In today’s society, people’s understanding of environmental protection and their own health is constantly deepened, and the emission requirements of automobile exhaust gas are increasingly high. Under the premise of this high emission standard, the development of the automobile industry has brought urgent problems to be solved. According to the investigation of relevant data, 0.4-1.0l gasoline can be saved in a journey of 100km for every 100kg reduction of vehicle mass.

At present, about 70% of the oil in the cars produced is consumed by the car weight. In order to meet the emission standard of automobile exhaust, automobile lightweight is a very effective method. In many automobile companies, lightweight materials have been used instead of traditional materials in order to reduce the quality of automobiles.

ZL101A is widely used in some castings of automobile industry. It is a typical Al Mg Si alloy with good fluidity, no hot crack tendency and small linear shrinkage.

Moreover, for the Al Mg SI system alloy, the T6 heat treatment process can be used to refine the mg2ssi system alloy, the T6 heat treatment process can be used to refine the mg2ssi system alloy, and the T6 heat treatment process can be used to refine the Mg2Si system alloy to achieve the required comprehensive mechanical properties. At present, ZL101A aluminum alloy has been widely used in the field of lightweight automotive parts. In this paper, ZL101A is proposed to be used in the lightweight of the front and rear cast aluminum bearing of a certain automobile chassis part, and its performance characteristics and microstructure are studied to provide support for the application.

(1) The high temperature flow stress state of fe-13cr-4al alloy is mainly affected by temperature and strain rate, and it is affected by low deformation temperature (800-900 ℃), low strain rate (0.01-0.1s-1) (800-900 ℃), low strain rate (0.01-0.1s-1) (800-900 ℃) and low strain rate (0.01-0.1s-1) Under the condition of deformation, it shows the characteristics of dynamic recrystallization, while under the condition of deformation (0.01, 0.1, 1, 10 s-1) (950-1000 ℃), it shows the characteristics of dynamic recovery (0.01, 0.1, 1, 10 s-1) (950-1000 ℃).

(2) The high temperature rheological behavior of fe-13cr-4al alloy can be described by the constitutive equation including Arrhenius term

(3) The material constants Q, α, N and LNA are all functions of strain, and the relationship between them can be fitted by using quintic polynomials. At the same time, the constitutive equation including strain compensation can be used to predict the change of flow stress of fe-13cr-4al alloy at experimental temperature and strain rate.