Research Of The Mechanical Properties Of Parts Of HSS Tailored Tempering

In recent years, manufacturing technology continues to progress, demand from the automotive industry also rises, the mechanical properties of the parts have higher requirements, and in order to conserve energy and to reduce emissions, the use of high-strength steel starts increasing. But the strength of ultra-high strength steel can reach 1000 MPa after cold stamping, which led to problems like great resilience, and low precision. However, there are many problems in the process of forming high strength steel in the traditional process of cold stamping process, in order to solve these problems people are concerned about high strength steel hot forming. Different organizations, different properties in different parts of the thermoforming process can be gotten, and according to different requirements of parts, to design different thermoforming process for them is very necessary.In this paper, the writer explores the influence of mold temperature and various forming processes on the mechanical properties of the parts by changing the temperature of the mold and forming process according to the basic principle of thermoformed. USibor1500(22MnB5) is taken as research subjects, and different experiments are designed for the die temperature, dwell time, cooling process. Preliminary analysis is done through numerical analysis method, and flat die experiments are done, organizational structure is observed, and the research of the mechanical properties of parts in different process and different drawing rate are done. The results showed that: with the die temperature gradually increasing, sheet metal cooling rate decreases, bainite content increases, the tensile strength of parts reduces, the hardness lowers and ductility increases. Parts gain better deformation and collision capability at the expense of decreased strength. The paper compares the simulated temperature and actual temperature and finds a more accurate simulation method.