Difference between aluminum alloy and aluminum profile

Difference between aluminum alloy and aluminum profile

Aluminum alloy is a kind of aluminum material, and it is also mixed with other metals, which is an alloy material. The aluminum profile is a product, which is made of aluminum alloy or pure aluminum, and can be directly used in the field of decoration. 2. The uses of the two are different, and the corrosion resistance, electrical conductivity and recyclability of aluminum profiles are more superior.

Difference between aluminum alloy and aluminum profile

In the building materials market, one is aluminum alloy, and the other is aluminum profile. Although there are many similarities between the two, there are still some differences. Today, Xiaobian will introduce aluminum alloy and aluminum for you. What is the difference between profiles.

The following article explains aluminum profiles in detail

Great prospects for the application of aluminum profiles

1. What are the differences between aluminum alloys and aluminum profiles?

The most direct difference is that the definitions of the two are different. Aluminum alloy is a kind of aluminum material, and it will also be mixed with other metals. It is an alloy material. The aluminum profile is actually a product, which is made of aluminum alloy or pure aluminum, and can be directly used in the field of decoration. The uses of the two are different, and the corrosion resistance, electrical conductivity and recyclability of aluminum profiles are more superior.

Difference between aluminium alloy and aluminum profile

2. What are the characteristics of aluminum profiles

①. Aluminum profiles made of pure aluminum have very good corrosion resistance, because the density of this material is 2.7 per cubic meter. If it is pure aluminum, it has very good corrosion resistance.
②. In addition, the conductivity of this material is also very good. Compared with other materials, the conductivity of aluminum is twice that of copper.
③. The thermal conductivity of aluminum profiles is also relatively prominent, so it can be made into a variety of utensils, such as cooking utensils, and our spatula can be made of aluminum alloys into an aluminum profile, including auto parts, etc. Etc., as well as radiators, are made of this material.
④. The processability of aluminum profiles is also very good, which can maintain the characteristics of the material.
⑤. Because this aluminum profile has a certain recyclability and can be reused, it is widely used in many aspects. It is also used in the furniture market and medical equipment, including some automated machinery and equipment.

3.The classification characteristics of aluminum alloys.

If it is divided according to its production process, it can be divided into deformed aluminum alloy or cast aluminum alloy. If it is a deformed aluminum alloy, there are also different products. For example, one is to prevent rust. Each has its own advantages and disadvantages, and the scope of application is also different.

Common products of aluminum profiles include: aluminium platealuminium coil, aluminium foil, aluminium strip, etc

Basic characteristics of aviation aluminum alloy

The main characteristics of aluminum alloys for aerospace are: large-scale and integration, thin-walled and lightweight, precision of section size and geometric tolerance, uniformity and quality of microstructure and properties. According to different service conditions and parts of aircraft, aluminum alloys for aerospace are mainly high-strength aluminum alloy, heat-resistant aluminium alloy and corrosion-resistant aluminum alloy. High strength aluminum alloy is mainly used for aircraft fuselage components, engine compartment, seats, control systems, etc., and is the most widely used,For example, 5086 aluminum alloy.

characteristics of aviation aluminum alloy

The biggest characteristic of aviation aluminum alloy is that it can improve the strength by deformation heat treatment. Deformation heat treatment is a comprehensive process that combines the deformation strengthening of plastic deformation with the phase transformation strengthening during heat treatment to unify the forming process and formability. During the plastic deformation process of aviation aluminum alloy, the defect density inside the crystal increases, and these crystal defects will cause the change of the internal microstructure of the material. In the process of plastic deformation of aviation aluminum alloy, dynamic recovery, dynamic recrystallization, sub dynamic crystallization, static recrystallization, static recovery and other crystal structure changes will occur. These changes in crystal structure, if properly controlled, will significantly improve the mechanical properties of the material and enhance the service life of the material.

Aeronautical aluminum alloys are generally strengthened by precipitation of dispersed phase in supersaturated solid solution. The general precipitation sequence is: segregation region (or GP region) ~ transition phase (metastable phase) ~ equilibrium phase. In the process of deformation heat treatment, deformation induces precipitation, precipitation affects deformation, deformation and precipitation affect each other, and dynamically affect the properties of the material.

characteristics of aviation aluminium alloy

The precipitation strengthening process of deformation heat treatment is greatly affected by temperature. Deformation heat treatment can be divided into high temperature deformation heat treatment and low temperature deformation heat treatment. The basic processes of low temperature deformation heat treatment are: quenching of aviation aluminum alloy, cold deformation at room temperature and aging heat treatment. After this treatment, the strength of aviation aluminum alloy is greatly improved, but the plasticity is reduced. High temperature deformation heat treatment process: quenching, high temperature deformation and aging. After high temperature deformation heat treatment, the strength of the material is higher, the plasticity and toughness are improved, and the heat resistance strength of the alloy is also improved.

The difference between pvc and pur cables

Although both PVC and PUR are classified as plastics, due to the different molecular formulas, the two chemical substances have significantly different properties. In contrast, PUR cables have excellent acid and alkali resistance, good resistance, abrasion resistance, low temperature resistance (low temperature resistance), moisture resistance, aging resistance, corrosion resistance, weather resistance, long application life, and UV resistance. Kinetic energy release and many other good effects, suitable for oil stains, extreme places of ultra-low temperature natural environment culmination.
PVC sheathed 10 million times extremely flexible and fast towline cable. Highly flexible PVC sheathed towline cable used in the cable towline management system. Special high-softness PVC is used as the outer sheath. Its function: and acid resistance Alkali and freezing liquid can be used in humid natural environment, but not suitable for outdoor use. Especially messed up and the material of PVC is that the cable has a long service life.
Modified material pvc raw material towline cable
PUR sheathed 10 million times extremely flexible and fast towline cable. Highly flexible PUR sheathed towline cable used in the cable towline management system. The PUR outer sheath is used. The key function: it adopts resilience and is very resistant to abrasion. Very good wear resistance, hydrolysis resistance, acid resistance, can be used in humid natural environments, because it has good weather resistance, it can be suitable for indoor and outdoor applications.


The quality of PVC cable material is basically determined by the secret recipe of PVC cable material and the material selected. Especially at the environmental protection cable material level and the environmental protection cable material level with special requirements.
Polyurethane material (PUR) is a kind of high polymer with urethane open chain repeating structural unit made by the reaction of acrylate and polyether polyol. PUR products are divided into polyurethane foam products and non-polyurethane foam products. Polyurethane foam products include soft plastic, rigid, and semi-rigid PUR plastic foam; non-polyurethane foam products include architectural coatings, adhesives, and synthetic leather. , Elastomer materials and collagen fibers. PUR raw materials have excellent functions, are widely used, and have many types of products. Cables made of PUR raw materials are called PUR cables.
Compared with PVC cables, PUR cables have excellent acid and alkali resistance, good resistance, abrasion resistance, low temperature resistance (low temperature resistance), moisture resistance, aging resistance, corrosion resistance, weather resistance, long application life, and Ultraviolet light and its kinetic energy release and many other good effects, suitable for oil stains, extreme places of ultra-low temperature natural environment culmination. Natural PUR raw materials are relatively higher than PVC materials, and the cost is much higher, at least 40% higher.
Although both PVC and PUR belong to plastics, due to the different molecular formulas, the two chemical substances have significantly different properties. In contrast, PUR cables have excellent wear resistance, good resistance, abrasion resistance, low temperature resistance (low temperature resistance), moisture resistance, aging resistance, corrosion resistance, weather resistance, long application life, and UV resistance. The kinetic energy is released and has many good effects, suitable for oil stains and extreme places where the ultra-low temperature natural environment is extreme.
In price comparison, the price of pur raw materials is twice as high as that of pvc raw materials. If it is a towline cable without special regulations, it is suggested to use modified material pvc raw materials to save a lot of costs.

Take you to understand mining cables and insulated environmental protection cables

Mining cable is the abbreviation of coal mine cable, which is a rubber sheathed cable for coal mine manufactured through national standards. Mining cables are suitable for mobile laying cables for mining power plants with power frequency rated voltage U0/U 8.7/10KV and below.
In the mine power supply system, high-voltage power supply lines generally use armored cables, and their failure rate is much less than that of low-voltage power supply.
The power supply in the mining area is a weak link in the power supply system, and the working environment is poor. Therefore, how to choose the type and section of the cable is related to the safety of the power supply operation.

The choice of cable type has a great relationship with the reliability, safety and economical reasons of the power supply. Article 467 of the Coal Mine Safety Regulations stipulates the following selection requirements for the selection of cables:
1. The level difference of the actual cable laying location should be compatible with the specified allowable cable laying level difference.
2. The cable should have a conductor with sufficient cross-section for protective grounding.
3. It is strictly forbidden to use aluminum-clad cables.
4. The fire -retardant cable that has passed the inspection and obtained the safety mark of coal mine products must be selected.
5. The cross-section of the main core of the cable should meet the load requirements of the power supply line.
Insulated environmental protection cables generally refer to wires and cables that have been tested by a regular testing organization, do not contain heavy metals and brominated flame retardants, do not produce harmful substances, and do not pollute the soil.
Insulated environmentally friendly cables can be recycled and will not harm the environment when discarded, and will not cause the spread of carcinogens. With the development of world economy and technology, the demand for cables is increasing, and their performance requirements are increasing. Under the new economic development trend and technical conditions, the development of the world’s cable industry has shown new trends, and insulated and environmentally friendly cables have gradually become the development focus of cables all over the world.

How to test and evaluate the quality of electric wires

For fire protection, maintenance and safety, it’s best to choose a wire specification for home improvement that has a certificate, a production license number, and a brand logo, and you must pay attention to its quality when purchasing overhead cables during home decoration. As long as there is nothing wrong with it, it is OK, otherwise the quality of the wires will not only affect our normal life, but there may also be huge safety hazards.
1. Appearance
Smooth and round, uniform color, insulating rubber and copper core are tight and not easy to peel off, inferior rubber looks thick, but when pressed hard, the squeezed part will become white, and it will be easy to age and fall off in the future, causing electric leakage.
2. Eccentricity
The thickness of the rubber ring is the same, that is, if the copper core is in the middle of the wire, the eccentricity is low.
3. Flame retardant
Use a lighter to burn the rubber. When the lighter leaves the wire, the wire should be automatically extinguished and a small amount of white smoke will be released. If the flame spreads and a large amount of white smoke is released, the rubber quality is not good.

4. Copper core
The high-purity copper core is anti-aging, high conductivity, and the fake color is yellow or white, and contains impurities. You can rub a piece of white paper on the copper core. If there are black substances on the white paper, it means that there are more impurities in the copper core. .
5. Logo
Whether there is a complete certificate of conformity, “CCC” mark, rated voltage, length, date, factory name and address and other complete information.
6. Thickness
The size of inferior copper core is often smaller than the size of a regular factory, and the outer insulation is thick, and the error of the wire section diameter cannot exceed 0.02%.
7. Length
The length of the ABC cable product conforms to the national standard 100±0.5m (that is, the standard is 100 meters, and the allowable error is 0.5 meters).
8. Weight
For the whole wire (100 meters), 1.5 square meters shall not be less than 1871 grams, 2.5 square meters shall not be less than 2915 grams, 4 square meters shall not be less than 4312 grams, and 6 square millimeters shall not be less than 6107 grams.

Fire-retardant and fire-retardant design of subway wires and cables

According to statistics from relevant departments, among the subway fires that occurred, fires caused by electricity accounted for more than half. However, in electrical fires, because there are relatively more wires and cables in subway buildings, and the underground environment is relatively humid, the commercialization of overhead cables, as well as aging and wire overload, etc., cause fires to be relatively large. Proportional. To a certain extent, the toxic gas emitted by the combustible insulation of wires and cables and the burning of protective materials will directly cause casualties, and will also restrict firefighting. Therefore, for these problems, it is necessary to use flame-retardant and fire-resistant wires and cables in the subway construction process, which can prevent electrical fires from occurring.
Subway cable laying


At present, the most commonly used in subway station construction is ordinary flame-retardant fire-retardant wires and cables, which are relatively simple in production and relatively low-cost. Under the conditions of laying, the cable is burned to control the flame spread in the corresponding range. In this way, it prevents the disaster caused by the fire of the wire and cable and improves the fire protection level of the cable. The flame retardants in electrical fires mainly include aluminum hydroxide, chlorinated paraffin, dioxin and phosphoric acid wax and so on. However, the materials of ordinary flame-retardant cables are cross-linked polyethylene, oil hemp and ethylene-propylene rubber, etc. These materials are relatively easy to burn, except for polyvinyl chloride. When a fire occurs in a subway station, the combustion will release a large amount of toxic gases such as hydrogen chloride, and the damage caused is greater than the harm of the fire itself. Therefore, the application of flame-retardant cable materials can prevent corrosive gases from appearing in the cable during combustion, and only produce a small amount of dense smoke, which also reduces the damage to the equipment and the human body, which is conducive to the follow-up rescue work after the fire. The cost of the insulating layer and protective material of the low-smoke flame-retardant cable is based on polyvinyl chloride resin, and then plasticizers and absorbents, high-efficiency flame retardants and marital inhibitors are added to it, and then passed It is produced by a special process. This material can greatly reduce the release of dense smoke and toxic gases produced by the burning of the material, thereby ensuring the safety of the victims and equipment under the subway. So as to reduce economic losses.

Soaring! Today’s copper price rises for 3 consecutive years! Up to 80000!

Today’s copper price

CCMN spot copper price: 77050 yuan / ton, up 2770 yuan / ton


Chile bill affects supply, copper may rise sharply on the 10th

Abstract: the prospect of economic restart in Europe and the United States is optimistic. Copper revenue rose nearly 3% every other week, reaching a record high. Chile’s tax increase bill will affect copper output, and renewable energy will promote consumption growth. Today, copper is expected to rise sharply.Huaxing ACSR Cable.
[copper futures market] with the acceleration of vaccine promotion, the prospects of economic restart in Europe and the United States are more optimistic. Every other week, Luntong continued to be strong and set a new record high. The latest closing price was $10413 / T, up 297 or 2.94%. The trading volume was 23447, up 9877, and the position was 328659, up 1073. On Friday night, Shanghai copper jumped to open high, and the latest closing price of the main monthly 2106 contract was 75720 yuan / ton, up 1570 yuan, or 2.12%.
London Metal Exchange (LME) reported its latest inventory of 126725 tons on May 7, a decrease of 4025 tons or 3.08% compared with the previous trading day.
Copper stocks in the previous period increased by 8603 tons to 208473 tons last week, after a slight decline for two consecutive weeks. Chile’s lower house of Parliament has passed a bill that includes a floating tax on copper sales based on copper price fluctuations. Industry analysts believe that the bill will at least delay Chile’s new copper production capacity projects. The CEO of Glencore believes that the copper price needs to grow to 15000 yuan to promote new supply, and the development of renewable energy will promote consumption growth for a long time. Today’s spot copper price is expected to rise sharply.

Working principle and characteristics of radiation cross-linked wire and cable

1. Explanation of the principle of irradiation:
Irradiation cross-linking is to use the high-energy electron beam generated by the electron accelerator to bombard the insulating layer and the sheath to break the polymer chain, and each broken point becomes a free radical. Free radicals are unstable and must be recombined with each other. After recombination, the original chain molecular structure becomes a three-dimensional network molecular structure to form crosslinks.
Second, the characteristics of radiation cross-linked low-smoke halogen-free wire and aaac cable
1. Large current carrying capacity; after radiation cross-linked cable, after high-energy electron beam irradiation, the molecular structure of the material changes from linear to three-dimensional network molecular structure, and the temperature resistance level is increased from non-crosslinked 70℃ to 90℃, 105 ℃, 125℃, 135℃, or even 150℃, the current carrying capacity of cables of the same specification is increased by 15-50%.
2. The insulation resistance is large; because the radiation cross-linked cable avoids the use of hydroxide as a flame retardant, it prevents pre-cross-linking during cross-linking and the insulation resistance drop due to the absorption of moisture in the air by the insulating layer. Thereby ensuring the insulation resistance value.

3. Long service life and strong overload capacity; due to the high temperature resistance grade and high aging temperature of the radiation crosslinked polyolefin material, the service life of the cable during the cycle of heating is extended.
4. Environmental protection and safety; since the materials used in the abc cables are all halogen-free environmentally friendly materials, the combustion characteristics of the cables meet environmental protection requirements.

5. Product quality temperature: The quality of traditional warm water cross-linked cables is affected by water temperature, preparation process, cross-linking additives and other factors, and the quality is unstable. The quality of irradiated cross-linked cables depends on the radiation dose of the electron beam. The radiation dose is controlled by a computer, and there are no human factors, so the quality is stable.
Irradiation cross-linked low-smoke halogen-free flame-retardant wires and cables are difficult to catch fire and have the ability to prevent or delay the spread of flames. They have strong overload capacity and once caught fire, they have halogen-free, low-smoke, non-toxic, and non-corrosive characteristics. Used in high-rise buildings, hotels, hospitals, subways, nuclear power plants, tunnels, power plants, ore, petroleum, chemical industries, etc.

Cable quality defects and troubleshooting methods

The degree of crosslinking (hot extension) is unqualified
If the degree of cross-linking fails to meet the standard, the thermal-mechanical properties of the aac cable are unqualified and cannot meet the requirement of 90°C working temperature.
The reasons for the unqualified cross-linking degree are the unqualified formula and the improper type and ratio of the compounding agent. The formula should be adjusted to solve the problem; the second is the improper vulcanization process, such as low air pressure, fast line speed, high cooling water level and other factors.
The solution is to first find out what is the reason, which may be one or several reasons at the same time, and eliminate the reasons.

Unqualified structure and appearance
(1) The thinnest point of the insulating layer thickness is lower than the minimum value specified in the standard, or the average thickness is lower than the nominal value. The reasons for the unqualified insulation thickness are the fast line speed, the small amount of glue from the extruder, and the improper selection of molds.
The solution is to reduce the linear speed or increase the speed of the extruder and adjust the size of the die.
(2) Eccentricity
The reason for the eccentricity is that the mold is not adjusted or the suspension control has changed after the recruitment is adjusted.
The solution is to control the drape as stable as possible during driving.
The reason for the appearance of the bamboo-shaped outside of the cable is electrical and mechanical systems that cause the traction speed to be unstable. The second is that the core is too small, or the outer diameter of the acsr conductor full form is uneven.
The troubleshooting method is to check the mechanical and electrical system and eliminate the fault. Properly adjust the size of the core, control the outer diameter of the suburbs and counties to be as uniform as possible, and the stranded wire that exceeds the process regulations can be used.

Scratches on the surface
(1) The cable touches the upper or lower wall or foreign matter in the vulcanizing tube. Therefore, it is required to adjust the degree of suspension, try to make the wire core move in the middle of the cross-linked tube, and find foreign matter, and clean it in time.
(2) There is burnt on the outer edge of the mold sleeve. The solution is to adjust the temperature of the mold sleeve when starting the car to prevent overheating. Once it is found to be burnt, it should be stopped immediately to remove it, or it will not get better by itself.
Most of the impurities in insulating materials and semi-insulating materials are brought in during mixing and during the feeding process of the extruder. Strict attention should be paid to the cleanliness of materials during operation to prevent the mixing of external impurities. Another kind of impurity is scorching lumps, its existence affects the performance and service life of the abc cable, so the temperature is strictly controlled during mixing and extrusion to prevent the occurrence of scorching.

There may be two reasons for bubbles generated in insulation, one is caused during extrusion. The solution is to select appropriate molds. There are bubbles in the shielding layer. The main reason is that there is moisture in the material. It should be dried before extrusion. The second is insufficient cooling. At this time, the following will appear. A circle of bubbles will appear on the circumference equidistant from the core.
The elimination method is to strengthen the cooling, raise the water level and lower the temperature of the cooling water.
Unqualified cable performance
(1) Unqualified free discharge and dielectric loss
The causes of dissociation discharge and dielectric loss unqualified are very complicated, and they are shielded from the outside. Whether the insulation contains bubbles and impurities is closely related to the performance of the raw materials. The elimination method is to keep the raw materials clean and strictly follow the production process.
(2) Cable insulation breakdown
The main cause of cable insulation breakdown is the mixing of insulating materials and external damage. Due to strict avoidance of external damage, the mixing of impurities should be avoided as much as possible. The semi-finished products are strictly managed to prevent stumbling.
(3) Cushion breakdown
The main reason for the cushion layer breakdown is the steel with burrs, curling, and puncture the cushion. The method of elimination is the use of different quality requirements of the steel belt. The cushion shall be made of plastic tape with a higher hardness, and it shall be ensured The thickness of the cushion.

The basic process flow of plastic wire and cable manufacturing

1. Copper and aluminum monofilament drawing
Commonly used copper and aluminum rods for wires and cables, at room temperature, use a wire drawing machine to pass through one or several stretch die holes to reduce the cross-section, increase the length, and increase the strength. Wire drawing is the first process of various wire and abc cable companies, and the main process parameter of wire drawing is die matching technology.
2. Monofilament annealing
Copper and aluminum monofilaments are heated to a certain temperature to recrystallize the toughness of the monofilament and reduce the strength of the monofilament to meet the requirements of the wire and cable for the conductive core. The key to the annealing process is to prevent the oxidation of the copper wire.

3. Stranding of conductors
In order to improve the flexibility of the wire and cable and facilitate the laying and installation, the conductive core is made of multiple monofilaments twisted. From the stranding form of the conductive core, it can be divided into regular stranding and irregular stranding. Irregular stranding is divided into bundle stranding, concentric twisting, special stranding and so on. In order to reduce the occupied area of ​​the wire and reduce the geometric size of the cable, the compacted form is adopted while the acsr conductor size is twisted, so that the ordinary circle is transformed into a semicircle, sector shape, tile shape and compacted circle. This kind of conductor is mainly used in power cables.

4. Insulated extrusion plastic wires and cables mainly use extruded solid insulation layer, the main technical requirements of plastic insulation extrusion:
4.1. Eccentricity: The deviation value of the extruded insulation thickness is an important indicator of the level of the extrusion process. Most of the product structure dimensions and deviation values ​​are clearly specified in the standard.
4.2. Smoothness: The surface of the extruded insulating layer must be smooth, and there must be no poor quality problems such as surface roughness, burnt, and impurities
4.3. Density: The cross-section of the extruded insulation layer should be dense and strong, and no pinholes visible to the naked eye are allowed to prevent the existence of air bubbles.
5. Cable
For multi-core cables, in order to ensure the degree of forming and reduce the appearance of the cable, it is generally necessary to twist them into a circle. The stranding mechanism is similar to that of conductor stranding. Because the stranding pitch diameter is larger, most of them adopt the non-back-twisting method. Technical requirements for cable formation: First, to prevent twisting of the cable caused by the overturning of the special-shaped insulated core; second, to prevent the insulation layer from being scratched. Most of the cables are completed with the completion of the other two processes at the same time: one is filling to ensure the roundness and stability of the cable after the cable is formed; the other is binding to ensure that the cable core is not loose.

6. Inner sheath
In order to protect the insulated core from being damaged by the armor, it is necessary to properly protect the insulating layer. The inner protective layer is divided into: extruded inner protective layer (isolation sleeve) and wrapped inner protective layer (cushion layer). The wrapping cushion layer replaces the lashing tape and the cable forming process is carried out simultaneously.
7. Armoured
For cables laid underground, they may be subjected to certain positive pressure during work, and an inner steel tape armored structure can be selected. Cable laying in occasions with both positive pressure and tension (such as in water, vertical shafts or soil with a large drop), the structure type with inner steel wire armor should be selected.
8. Outer sheath
The outer sheath is the structural part that protects the insulating layer of the wire and cable from environmental factors. The main function of the outer sheath is to improve the mechanical strength of the wire and cable, prevent chemical corrosion, moisture, waterproof, and prevent the cable from burning. According to the different requirements of the cable, the plastic sheath is directly extruded by the extruder.