材料期刊网

本文研究了“淬火-分配-（回火）”（Q-P(-T)）工艺处理对35Si2Ni2钢显微组织和力学性能的影响，并与传统的淬火回火（Q-T）工艺进行比较，用SEM、TEM、XRD分析了微观组织。试验结果表明，相对于传统淬火回火（Q-T）工艺，经Q-P工艺处理后得到了较多的残余奥氏体，强度水平稍有降低，而塑韧性明显提高，经Q-P工艺处理后再进行回火处理后，残余奥氏体分解，析出ε碳化物，导致Q-P工艺处理钢的屈服强度升高，屈强比升高。

The effect of “Quenching-Partitioning-(Tempering)(Q-P(-T)) process on the microstructure and mechinicial properties of 35Si2Ni2 steel were investigated in this paper, and compared with traditional Quenching-Tempering(Q-T) process, Microstructure was studyed by using SEM, TEM and XRD. The results show that, compared with traditional quenching-tempering process, samples treated by quenching-partitioning get more retained austenside, the strength decrease slightly, while the ductibility and toughness improved markedly. Retained austenside of the samples treated by quenching-partitioning-tempering process decomposited and ε carbides precipitated, which result in the increasing of yield strength, as well as the yield ratio.