高性能节约型不锈钢制备技术研发与应用

摘要

Quenching and partitioning(Q&P)treatment was applied to cold rolling sheets of 409L and 410S ferritic stainless steels,which resulted in a multiphase microstructure of ferrite, martensite and retained austenite. The austenitizing temperature,quenching temperature and partitioning time were optimized to obtain the maximum martensite and retained austenite. Compared to normally annealed and quenching and tempering(Q&T)treated sheets,the Q&P treated one exhibited the best combination of strength and elongation,a continuous yielding and moderate n-value and r-value,which satisfied the requests of high strength and well formability and can substitute advanced high-strength steel in manufacture of automobile structural parts.%开发了409L和410S铁素体不锈钢冷轧板的淬火-配分（Q&P）工艺，获得了铁素体、马氏体和残余奥氏体的复相组织。通过优化奥氏化温度、淬火温度和配分时间，获得了尽量多的马氏体和残余奥氏体。与常规退火和淬火-回火（Q&T）工艺相比，Q&P工艺获得了最优的强度和延伸率组合、连续性屈服和适中的n值、r值，达到了高强度和易成型的要求，能够替代先进高强钢用于生产汽车结构件。