| Ultrahigh-strength steel plays an important role in the automotive lightweighting industry. However, with the enhancement of the steel strength, its formability is worsened dramatically. So, failure and fracture are always occurred in stamping. As a new production process, hot stamping can help to solve these problems. Hot stamping is such a technology, by which the metal with high temperature has good plasticity and ductility, and its yield strength decreases. The material has better plasticity, higher forming limit and easier to shape in hot stamping than in cold stamping. In recent years, many foreign companies pay much attention to the study of hot stamping of ultrahigh-strength steel, but less study of our country is carried out. Thus, it is meaningful to take the study on hot stamping of ultrahigh-strength steel.Arcelor Company's USIBOR1500 is a representative Ultrahigh-Strength Boron Steel plate, which mechanics performance can be greatly enhanced through hot stamping process. This paper's research studies on the USIBOR1500 Boron Steel plate. Firstly, its mechanics performance is measured in normal temperature. The deformation resistance in different temperature, different strain and different strain rate are investigated with tensile experiments, and the mathematic model of deformation resistance of steel is based on liner regression with least-square method, which provides the scientific basis for the production. Secondly, the quenching speed is obtained through gas quenching experiment, which is performed on the plate with high temperature. Besides, a solid quenching experiment is carried out and corresponding simulation is taken, which draw a conclusion that solid quenching satisfies the demand of quenching speed. This conclusion makes the cooling method simpler, which can direct the mould design.
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