1. Hardness Many customers are very concerned when buying aluminum
. The choice of hardness is directly related to the chemical composition of the alloy. Secondly, different conditions also have a greater impact. Judging from the achievable hardness, 7 series, 2 series, 4 series, 6 series, 5 series, 3 series, 1 series, which decrease in order. Second, strength Strength is an important factor that must be considered during product design. When aluminum alloy components are used as components, appropriate alloys should be selected according to the pressure they bear. Pure aluminum has the lowest strength, while the 2 series and 7 series heat-treated alloys have higher degrees, and there is a certain relationship between hardness and strength. 3. Corrosion resistance Corrosion resistance includes chemical corrosion, stress corrosion resistance and other properties. Generally speaking, pure aluminum of series 1 has higher corrosion resistance, series 5 performs well, followed by series 3 and 6, and series 2 and 7 are inferior. The selection principle of corrosion resistance should be determined according to its use occasion. For high-strength alloys to be used in a corrosive environment, various anti-corrosion composite materials must be used. Four. Machinability Machining performance includes insert forming performance and cutting performance. Because formability is related to state, after selecting aluminum alloy grades, the strength range of various states must be considered. Generally, high-strength materials are not easy to form. Taiguo needs to bend, stretch, and deep-draw the aluminum material. The formability of the material in the annealed state is the best. On the contrary, the formability of the heat-treated material is the worst. Aluminum alloy has poor machinability and better machinability for molds and mechanical parts. On the contrary, low-strength ones have poor machinability. For products that require cutting, such as molds and mechanical parts, the machinability of aluminum alloy is important. Consider factors. 5. Weldability There is no problem with the weldability of most aluminum alloys, especially some 5 series aluminum alloys, which are designed for welding considerations. On the contrary, some 2 series and 7 series aluminum alloys are difficult to weld. 6. Decorative performance. When aluminum is used for decoration or some specific occasions, its surface needs to be processed by anodizing, painting, etc. to obtain the corresponding color and surface structure. At this time, its decorative properties should be considered, generally In terms of materials with better corrosion resistance, their anodic treatment performance, surface treatment performance, and coating performance are excellent.
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