The Study On Microstructure And Mechanical Properties Of A356.2 Aluminum Alloy Wheel

Aluminum alloy wheels with its beautiful appearance, safe and comfortable, such as the characteristics of more and more private owners of favor. Now almost all the new models have used the aluminum alloy wheel. Because of the light weight of aluminum alloy wheel, the manufacturing precision is high, the deformation is small and the inertia resistance is small in high speed rotation. This is conducive to improve the car’s straight line driving performance, reduce tire rolling resistance, thereby reducing fuel consumption. While the heat transfer coefficient of aluminum alloy steel, iron and other big three times, the heat dissipation effect is much better, thus enhancing the braking efficiency, improve the service life of the tire and brake disc, effectively protect te shafety of the car. Aluminum alloy has many advantages, such as beautiful, durable, light weight, good heat dissipation, good corrosion resistance and excellent mechanical properties, which has been widely used in automobile industry. Automobile aluminum alloy wheel not only as the appearance, but also as a safety device, its structure and mechanical properties of the automobile factory is particularly valued. The structure and mechanical properties of the structure are controlled by special characteristicsThis article through to the manufacturing process of aluminum alloy wheel each link’s influence on the mechanical properties and structure analysis, and through the problems in the process of production and quality complaint analysis and solution or experimental study. Shows that(1) Sr modification has a significant effect on the characteristic values of A356.2 al alloy. With the increase of the amount of Sr modifier, total crystal core temperature and eutectic temperature decreased platform. When the addition amount of Sr reached Sr, the modification effect of 500 ppm on eutectic silicon was the best. In this article, the eutectic silicon changes from coarse acicular, fibrous or wormlike punctate.(2) A356.2 aluminum alloy ingot melting to 720 to 750 DEG C in the process of serious loss of strontium. Since A356.2 Al alloy can improve the hydrogen absorption rate in the process of melting, it can be used to adjust the strontium content in addition to the addition of strontium before refining. The process requirements can be achieved by adjusting the strontium content by adding strontium to the refining process. A356.2 liquid aluminum alloy in die casting machine insulation burning furnace also appeared, but the ratio in the smelting process of strontium burning less.(3) from the point of view of the test results, Al5Ti0.45 C join than simple refinement of Al5Ti1 B enable A356.2 aluminum alloy strength and elongation increased, especially spoke position changed significantly; hardness is not obvious. But from the grain size picture, the grain size of the grain is finer than that of the Al5Ti1 B after the refinement of Al5Ti0.45 C. For A356.2 Al alloy Al5Ti0.45 C, Al5Ti1 B is a better refinement effect.(4) the main factors that affect the mechanical properties of A356.2 aluminum alloy wheel are chemical composition, slag containing gas, and the influence of temperature on the process.(5) the influence of die casting process on the mechanical properties of aluminum alloy wheels, mainly due to the influence of casting defects and crystallization rate.(6) the heat treatment process is an important step in the mechanical properties of A356.2 aluminum alloy wheel, which can improve the strength and hardness by changing the microstructure. Effect of heat treatment process and coating process parameters on A356.2 aluminum alloy. The yield strength of T4(natural aging 48 hours) after heat treatment is lower than that of T6, the tensile strength of 20-30%, the tensile strength and the hardness of 10-20%, and the elongation of the alloy are improved by 70-100%. The tensile strength, yield strength and hardness of the alloy are higher than those of the coating. Effect of multiple artificial aging on mechanical properties of A356.2 aluminum alloy wheel in low pressure casting. The tensile strength, yield strength and hardness of the alloy have been improved by many artificial aging. The elongation rate decreased, and the number of artificial time increased, the microstructure and mechanical properties of A356.2 Al alloy were stable. The tensile strength and hardness of the grain were not affected by the T6 heat treatment...