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研究了低碳硅锰钢经I&P&Q和I&Q&P工艺处理后的组织性能。结果表明:经I&P&Q工艺处理得到的马氏体板条较I&Q&P工艺粗大,I&Q&P工艺下的部分板条马氏体形貌模糊;I&P&Q工艺利用Mn配分使钢具有12.6%的伸长率,强塑积16128MPa·%,I&Q&P工艺利用Mn配分和C配分的综合作用,使得伸长率大幅提高,强塑积达到33715 MPa·%;较I&P&Q工艺只有Mn配分作用稳定残余奥氏体,I&Q&P工艺在Mn、C配分共同作用下,使残余奥氏体量较I&P&Q工艺提高了6%。
The microstructure and properties of low-carbon Si-Mn steels treated by I & P & Q and I & Q & P processes were studied. The results show that the martensite lath obtained by I & P & Q process is thicker than that of I & Q & P. The lath martensitic morphology of I & Q & P process is fuzzy. The I & P & Q process makes the steel have elongation of 12.6% Product ratio of 16128MPa ·%, I & Q & P process using the combined effect of Mn and C with a large increase in elongation, plastic content reached 33715 MPa ·%; compared with the I & P & Q process only Mn stable stabilizing residual austenite, I & Q & P process in Mn , C with the role of the joint, so that the amount of retained austenite I & P & Q process increased by 6%.