Improvement of Mechanical Properties of Automotive Components Using Hot Stamping with Integrated Q-P Process
Cold forming of high strength materials is accompanied by an undesirable spring-back effect and therefore the automotive industry prefers to produce components from high strength steels by hot stamping. Hot deformation and cooling in a die are applied to obtain shaped components with martensitic microstructure and high yield strength and ultimate tensile strength. This article presents new applications of this forming technology by incorporating another innovative heat treatment by the Q-P process, which improves both strength and ductility of obtained structures at the same time. Ultimate strengths over 2000 MPa with ductility above 10％ can be achieved by this processing. To test microstructure development, thin sheet was hot formed and a corresponding FEM simulation was created. This processing was applied to low alloyed AHS steel with 0.42％ of carbon and with an alloying strategy based on Mn, Si and Cr. Martensitic microstructure with retained austenite was obtained by this processing with a strength of around 2000 MPa and ductility of 10％.
hot stamping AHSS Q-P process
MASEK Bohuslav JIRKOVA Hana KUCEROVA Ludmila ZEMKO Michal
University of West Bohemia, Research Centre of Forming Technology,CZ–30614 Pilsen,Czech Republic COMTES FHT a.s.,Pr(u)mysloa 955,CZ-334 41 Dob(r)any,Czech Republic
国际会议
The 6th International Conference on High Strength Low Alloy Steels(第六届高强度低合金钢国际会议HSLA Steels2011)
北京
英文
384-388
2011-05-31（万方平台首次上网日期，不代表论文的发表时间）