先进超高强度-高塑性Q-P-T钢

ADVANCED Q-P-T STEELS WITH ULTRAHIGH STRENGTH-HIGH DUCTILITY

首先论述从淬火-分配(Q&P)工艺发展起来的淬火-分配-回火(Q-P-T)工艺以及两者的差异,总结Q-P-T钢从超高强度到高强塑性的发展,对比先进新型Q-P-T工艺和传统淬火-回火(Q-T)工艺的差异及其对钢力学性能的不同影响,重点讨论在形变中残留奥氏体对超高强钢塑性增强的微观机制,为先进高强钢的进一步发展提供组织设计和控制的理论指导.

The quenching-partitioning-tempering（Q-P-T） process was developed from quenching partitioning（QP） process and their difference are first described in this paper.The development of Q-P-T steels from ultrahigh strength to high strength-ductility is summarized.Novel Q-P-T process and conventional quenching-tempering（Q-T） process and their different effects on mechanical properties are compared.The micro-mechanism of the ductility enhancement from retained austenite in unltrahigh strength steels during deformation is emphasized in discussion,which provides guidance for microstructural design and control on the further development of advanced high strength steels.