淬火-配分-回火工艺处理低碳低合金钢的氢脆敏感性

Susceptibility to Hydrogen Embrittlement of Low-Carbon and Low-Alloy Steel Treated by Quenching-Partitioning-Tempering Process

对低碳低合金钢进行淬火-配分-回火(Q-P-T)工艺处理,研究了Q-P-T处理后试验钢的显微组织、力学性能以及氢脆敏感性,并与传统淬火回火(Q-T)工艺处理后的进行了比较。结果表明:相对于传统Q-T工艺,Q-P-T工艺处理后的试验钢获得了较多的残余奥氏体,塑性和韧性分别提高了3.5%和27%,氢脆敏感性降低;残余奥氏体对降低氢脆敏感性具有积极作用。

The microstructure,mechanical property and susceptibility to hydrogen embrittlement of a low-carbon and low-alloy steel treated by quenching-partitioning-tempering (Q-P-T)process was studied,and compared with those of the steel treated by traditional quenching-tempering (Q-T)process.The results show that the steel treated by Q-P-T process contained more retained austenite,the ductility and toughness increased by 3.5% and 27%respectively,and the susceptibility to hydrogen embrittlement decreased comparing with that by Q-T process.The retained austenite plays a positive role in decreasing the susceptibility to hydrogen embrittlement.