Microstructure and mechanical properties of a Nb-microalloyed medium carbon steel treated by quenching-partitioning process
The recently developed quenching and partitioning heat treatment and quenching-partitioning-tempering heat treatment are novel processing technologies,which are designed for achieving advanced high strength steels (AHSS) with combination of high strength and adequate ductility.In present study,a medium carbon steel containing Nb was subjected to the Q-P-T process,and both the microstructure and mechanical properties was studied.The experimental results show that the Nb-microalloyed steel demonstrates high tensile strength and relatively high elongation.The microstructure of the steel was investigated in terms of scanning electron microscope and transmission electron microscope,and the results indicate that the Q-P-T steel consist of fine martensite laths with dispersive carbide precipitates and the film-like interlath retained austenite.The orientation relationships between martensite and retained austcnitc is as well-known Kurdjurmov-Sachs relationship:(111)a//101γ,(1(1)0)a//((1)ll)γ and Nishiyama-Wasserman relationship:(1)00α //101y,(011)α//((1)11)γ.
High strength steel Quenching and partitioning steel Microstructure Mechanical property
Kai Zhang Shangwen Lu Yaohui Ou Xiaodong Wang Ning Zhong
Institute of Concrete Pumps Machinery R & D, Sany Heavy Industry Co., Ltd, Changsha 410100,China School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240,China Institute of Marine Materials Science and Engineering, Shanghai Maritime University, Shanghai 200135
国际会议
广州
英文
596-599
2012-11-16（万方平台首次上网日期，不代表论文的发表时间）