热变形对淬火配分低碳CrNi3Si2MoV钢组织和力学性能的影响

特殊钢 ›› 2014, Vol. 35 ›› Issue (4): 55-58.

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

收稿日期:2014-03-03 出版日期:2014-08-01 发布日期:2022-09-03
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

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

摘要/Abstract

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

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

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.

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.

参考文献

[1] Speer J, Matlock D K, De Cooman B C, et al. Carbon Partitioning into Austenite after Martensite Transformation [J]. Acta Material, 2003, 51(9):2611-2622.
[2] Matlock D K, Brautigam V E, Speer J G. Application of the Quenching and Partitioning (Q&P) Process to a Medium-carbon High Si Microalloyed Bar Steel [J]. Materials Science Forum, 2003,426 (4) ；1089-1094.
[3] Speer J,Streicher A M,Matlock D K,et al. Quenching and Partitioning： A Fundamentally New Process to Create High Strength Trip Sheet Microstructures[C] // Damm E B, Merwin M. Austenite Formation and Decomposition. Warrendale PA: TMS-1SS, 2003: 505-522.
[4]王存宇.30GPa%级超高强度马奥组织钢的研究[D].北京:钢铁研究总院,2010.
[5] Bohuslav M, Hana J, Daniela H, et al. The Effect of Mn and Si on the Properties of Advanced High Strength Steels Processed by Quenching and Partitioning [J]. Materials Science Forum, 2010,654-656： 94-97.
[6] Mullner P, Solenthaler C. On the Effect of Deformation Twinning on Defect Densities [J]. Materials Science and Engineering A, 1997, 230(1-2) ：107-115.
[7] Speer J G, Matlock D K. Developments in the Quenching and Partitioning Process [J]. World Iron & Steel,2009(1) ：31-39.
[8] Somani M C, Kaijalainen L P Porter D A, et al. Evaluation of the Behaviour and Properties of a High-Si Steel Processed Using Direct Quenching and Partitioning [J]. Materials Science Forum, 2012, 706-709 ：2824-2829.
[9] Zhou S, Zhang K, Chen N L, et al. Investigation on High Strength Hot-rolled Plates by Quenching-Partitioning-Tempering Process Suitable for Engineering [J]. ISIJ International ,2011,51(10) ： 1688-1695.
[10] Thomas G A, Speer J G, Matlock D K. Quenched and Partitioned Microstructures Produced Via Gleeble Simulations of Hot-Strip Mill Cooling Practices [J]. Metallurgical and Materials Transactions A： Physical,2011,42 (12) ：3652-3659.
[11]张玉杰，王存宇,曹文全，等.热变形+Q&P工艺处理钢的微观组织和硬度[J]热加工工艺,2013 ,42(10):188-190.
[12]张玉杰，王存宇,刘文忠，等.变形温度对淬火配分钢微观组织和硬度的影响[J].材料热处理学报,2013,34(5):97-102.
[13] Guimaraes J R C, Shyne J C. On the Effect of Plastic Deformation on Thermal Stabilization of Austenite in an Fe-Ni-C Alloy [J]. Metallurgical Transactions A,1971 ,2(8) ：2063-2065.
[14] Koistinen D P, Marburger R E. A General Equation Prescribing the Extent of the Austenite-Martensite Transformation in Pure Iron Cabron Alloys and Plain Carbon Steel [J]. Acta Metallurgica, 1959, 36(7) ：59-63.
[15] Maxwell P C, Goldberg A, Shyne J G. Stress-Assisted and Strain-induced Martensites in Fe-Ni-C Alloys [J]. Metallurgica Transactions A,1974,5(6) ：13O5-1138.
[16]徐祖耀.马氏体相变与马氏体[M].北京:科学出版社(第二版),1999:700-704.