Effect of Hot Deformation on Structure and Mechanical properties of Quenched and Partitioned Low Carbon CrNi3Si2MoV Steel

Special Steel ›› 2014, Vol. 35 ›› Issue (4): 55-58.

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Effect of Hot Deformation on Structure and Mechanical properties of Quenched and Partitioned Low Carbon CrNi3Si2MoV Steel

Fu Yongtao^1,2, Liu Jing¹, Wang Cunyu³, Zhang Yujie^3,1, Jia Guoxiang^3,4, Shi Jie³, Dong Han³

1 School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430080
2 Research and Development Center, WISCO, Wuhan 430080
3 Institute for Special Steels, Central Iron and Steel Research Institute, Beijing 100081
4 School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055

Received:2014-03-03 Online:2014-08-01 Published:2022-09-03

热变形对淬火配分低碳CrNi3Si2MoV钢组织和力学性能的影响

付勇涛^1,2, 刘静¹, 王存宇³, 张玉杰^3,1, 贾国翔^3,4, 时捷³, 董瀚³

1武汉科技大学材料与冶金学院，武汉430080 ；
2武汉钢铁集团公司技术研究院，武汉430083；
3钢铁研究总院特殊钢研究所，北京100081 ；
4西安建筑科技大学冶金工程学院，西安710055

通讯作者: 通讯作者:刘静，教授，博士生导师，武汉科技大学材料与冶金学院，武汉430080 E-mail ：Eujing@ wust. edu. cn
作者简介:付勇涛(1978-)，男,博士生，高级工程师,1999年武汉科技大学(本科)毕业，高强度钢研发。
基金资助:
青年科学基金项目(51101036),
国家973项目 (2010CB630803)资助

Abstract

Abstract: Test steel CrNi3Si2MoV (/% ： 0.21C, 1.75Si 0.29Mn, 0.006 0P, 0.0007S, 1.03Cr, 2.86Ni, 0.31 Mo, 0.08V) is melted by a 50 kg vacuum induction furnace and forged to φ15 mm bar product. The effect of hot deformation on structure and hardness of test steel CrNi3Si2MoV austenitized at 1 200 ℃, then hot deforming with 10% 〜 70% at 750 °C + quenching and partitioning (Q&P) treated by quenching to 330 °C and 550 ℃ for 1 min is studied by Gleeble-3800 thermal simulation machine, scanning and transmission electron microscope (SEM and TEM), and X-ray diffractometer (XRD). Test results show that the structure of hot deformation + Q&P treated steel CrNi3Si2MoV is lath martensite + 5. 7% ~ 17.2% lamella residual austenite, with 30% hot deformation the residual austenite amount (17. 2%) in steel is maximum, with 50% hot deformation the hardness HV value of steel is maximum up to 448, and as hot deformation up to 70%, the obvious recrystallization of steel occurs with fine structure and the hardness of steel decreases.

Key words: , Low Carbon CrNi3Si2MoV Steel, Hot Deformation, Quenching and Partitioning (Q&, P), Martensite, Residual Austenite, Hardness

摘要： 试验用CrNi3Si2MoV钢(/%:0.21C,1.75Si,0.29Mn,0.0060P,0.0007S,1.03Cr,2.86Ni,0.31Mo,0.08V)由50 kg真空感应炉冶炼,并锻成φ15 mm的钢棒。通过Gleeble-3800热模拟试验机、扫描、透射电镜(SEM、TEM)和X-射线衍射仪(XRD)等研究了1 200℃奥氏体化的CrNi3Si2MoV钢在750℃ 10%~70%热变形+淬火至330℃和550℃1 min的淬火分配(Q&P,Qnenching and Partitioning)处理后,热变形量对Q&P处理试验钢组织和硬度的影响。试验结果表明,热变形+Q&P处理后CrNi3Si2MoV钢的组织为板条奥氏体+5.7%~17.2%薄膜状残留奥氏体;变形量为30%时残留奥氏体量最大(17.2%),50%变形时HV值最大为448,当变形量达70%时该钢发生明显的再结晶,组织细化,钢的硬度降低。

关键词: 低碳CrNi3Si2MoV钢, 热变形, Q&, P(淬火分配), 马氏体, 残留奥氏体, 硬度

Fu Yongtao, Liu Jing, Wang Cunyu, Zhang Yujie Jia Guoxiang, Shi Jie , Dong Han. Effect of Hot Deformation on Structure and Mechanical properties of Quenched and Partitioned Low Carbon CrNi3Si2MoV Steel[J]. Special Steel, 2014, 35(4): 55-58.

付勇涛, 刘静, 王存宇, 张玉杰, 贾国翔, 时捷, 董瀚. 热变形对淬火配分低碳CrNi3Si2MoV钢组织和力学性能的影响[J]. 特殊钢, 2014, 35(4): 55-58.

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Effect of Hot Deformation on Structure and Mechanical properties of Quenched and Partitioned Low Carbon CrNi3Si2MoV Steel

热变形对淬火配分低碳CrNi3Si2MoV钢组织和力学性能的影响

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