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Kemet Share | Basic Knowledge and Application of Aluminum

Release time:

2021-10-12

Silver, in the humid air can form a layer of metal corrosion oxide film, the relative density of 2.7g/cm3, melting point of 660 ℃, boiling point of 2327 ℃, higher than the strength, good electrical and thermal conductivity, high reflectivity and oxidation resistance.

1. the basic properties of aluminum

silvery white, in humid air can form a layer of metal corrosion prevention oxide film, relative density 2.7g/cm3, melting point 660 ℃, boiling point 2327 ℃, high specific strength, good electrical and thermal conductivity, high reflectivity and oxidation resistance.

2. Type

Profile Type: Aluminum Profile, Aluminum Pipe, Aluminum Bar, etc.

Plate Class: Aluminum Plate, Aluminum Foil, Aluminum Strip (Coil);

Casting Class: Aluminum Castings, Aluminum Grains; The first digit of

3. common brand

indicates the aluminum alloy series, and the second digit indicates the modification of the original aluminum alloy, the last two digits indicate the purity of the aluminum alloys in the same group.

1100: is used to process parts that require good formability and high corrosion resistance, but do not require high strength. For example, storage containers, sheet processing parts, deep-drawn concave vessels, heat exchangers, printing plates, nameplates, reflective appliances, etc.

2011: quick cutting alloy, good machinability and high strength, but poor corrosion resistance, suitable for volume shaft, optical components, screw head, screw and machining products requiring good cutting performance.

3003: has the performance of 1xxx series alloy and has higher strength than 1xxxx series alloy, such as kitchen utensils, food and chemical product processing and storage devices, tanks and tanks for transporting liquid products, and various pressure vessels and pipelines for thin plate processing.

4A01: has high silicon content, heat resistance and wear resistance. It is a building material, mechanical part, forging material and welding material.

5052: is the most representative alloy with medium strength (the highest 5083), with good corrosion resistance, solubility and formability, especially high fatigue strength and good seawater resistance. It is used in the manufacture of aircraft oil tanks, oil pipes, sheet metal parts of transportation vehicles and ships, instruments, street lamp brackets and rivets, hardware products, etc.

6061: heat-treated corrosion-resistant alloy. Treatment with T6 can have very high endurance values, but the strength of the joint is low, so it is suitable for screws, ships, vehicles, and land structures.

6N01: Medium-strength extrusion alloy can be used as large thin meat profiles with complex shapes, with good corrosion resistance and solubility. Applicable to vehicles, land structures, ships.

6063: representative extrusion alloy, lower strength than 6061, good extrudability, can be used as profiles with complex cross-sectional shapes, good corrosion resistance and surface treatment, and is suitable for building highway guardrails, vehicles, furniture, household appliances and decorations.

7072: electrode has low potential and is mainly used for corrosion-resistant covering leather materials. It is also suitable for heat exchanger fins, air conditioner aluminum foil and extra-thin strips.

7075: aluminum alloy has one of the highest strength of the alloy, but the corrosion resistance is not good, and 7072 covered with leather material can improve its corrosion resistance, but the cost increases. Suitable for aircraft, ski pole thick plate forging products.

Material Selection Example:

Product Requires Hard, Surface Treatment for Coarse Wire Drawing or Coarse Sand Surface, Selection of 5000 Series Aluminum Alloy, Commonly Used: 5052;

product surface treatment requirements are high, there can be no sand holes, profile traces, choose 6000 series aluminum alloy, commonly used: 6063/6061;

products require low price, need to stretch the shape complex, select 2000 series pure aluminum, commonly used: 2011;

products with high strength and high hardness need to be used for bearing structure. Select 7000 series aluminum alloy, commonly used: 7075.

4. aluminum surface treatment

, anodizing after sandblasting or wire drawing;

2, electrophoretic paint;

, powder electrostatic spraying after polishing, fluorocarbon spraying;

, electroplating after polishing the mirror surface;

, wood grain thermal transfer printing;

Titanium plating and electrophoresis process are the most expensive, followed by wood grain thermal transfer, anodizing, and finally spraying. The specific price is subject to the manufacturer's quotation.

5. aluminum profiles are mainly used in the following applications:

, architectural aluminum profiles (doors and windows, curtain walls;

2, radiator aluminum profile;

3, general industrial aluminum profile: mainly used in industrial production and manufacturing, such as automatic mechanical equipment, skeleton, etc., can be customized by mold opening;

, aluminum alloy profile for rail vehicle structure: mainly used for rail vehicle body manufacturing;

, decorate aluminum profile, make aluminum alloy face frame, mount various decorative paintings;

, appearance aluminum profile, mainly used in household appliances or communication industry, such as mobile hard disk, mobile power supply, TV set, display and other internal structure and appearance decoration.

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