Narrow Results

With vehicle safety regulations and the demand for vehicle lightweight are increasing gradually. The front bumper is increasing use of hot stamping or aluminum alloy. According the crash tests of base vehicle front bumper verify the validity of impact finite model. Complete front bumper crashworthiness analysis of a vehicle. Research front bumper made of high-strength steel, advanced high-strength steel, hot forming steel and aluminum alloy crashworthiness changes, by comparing, hot forming steel impact has the best crashworthiness, Aluminum alloy has best lightweight. Consider performance and cost, Front bumper using hot forming steel, the vehicle impact simulation analysis has been completed. Crash test results show that the results suffice development goals.

Hot forming technology can not only improve the impact resistance and safety performance of the car, but also reduce its weight, so it has become a popular research topic in China and abroad. Hot forming steel is divided into uncoated hot forming steel and coated hot forming steel. Hot stamping parts of coated hot forming steel do not need shot blasting treatment and have better corrosion resistance compared with uncoated hot forming steel, so coated hot forming steel has been used more widely. Al-Si coating is the most mature coating for hot forming steel, and the Zn coating hot forming steel is still in the research stage because of the narrow process window. This paper focuses on Masteel Al-Si coating hot forming steel, whose coating composition, matrix microstructure and mechanical properties before and after hot stamping is studied. The research shows that Masteel Al-Si coating hot forming steel has good performance, and it can meet the requirements of mainstream car manufacturers.

Hot forming has been an advanced technology, which fulfills lightweight of automotive body and guarantees crash safety at the same time. At present, hot forming has been an efficient way for automotive manufacturers to improve competence of their products. In this paper, a hot forming Bpillar reinforcement and its original steel sheet are evaluated, including component size, microstructure and mechanical properties. Meanwhile, three-point-bending and side impact testing are conducted for B-pillars manufactured from different raw material suppliers.