| 800MPa级冷轧相变诱发塑性钢的组织与性能 |
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| 引用本文： | 刘强,唐荻,江海涛,刘仁东. 800MPa级冷轧相变诱发塑性钢的组织与性能[J]. 机械工程材料, 2009, 0(10) |
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| 作者姓名： | 刘强 唐荻 江海涛 刘仁东 |
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| 作者单位： | 北京科技大学高效轧制国家工程研究中心,北京,100083;鞍山钢铁集团技术中心,鞍山,114001 |
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| 基金项目： | 国家“十一五”科技支撑计划资助项目(2006BAE03A06) |
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| 摘 要： | 采用全自动热模拟试验机测定了新开发的800 MPa级相变诱发塑性钢的CCT曲线,据此制定了12种工艺对试验钢进行退火处理;通过拉伸试验测定了经不同工艺退火处理试验钢的力学性能,确定出了最优热处理工艺;对经最优工艺退火处理钢的显微组织和残余奥氏体的稳定性进行了研究。结果表明:各种工艺处理钢均获得了800 MPa以上的抗拉强度,获得最佳综合力学性能(强塑积最大)的热处理工艺为830℃退火120 s后,先以20℃.s-1的速率缓冷至700℃,再以40℃.s-1的速率冷至400℃,并在400℃等温处理400 s,最后以20℃.s-1的速率冷至室温;经最优工艺退火处理后钢的显微组织为50%铁素体+38%贝氏体+12%残余奥氏体,残余奥氏体主要分布在铁素体晶界处,或铁素体与贝氏体的晶界处,还有小部分存在于大的铁素体晶粒内;在拉伸过程中试验钢中残余奥氏体的相变大部分发生变形量为10%~20%阶段。
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| 关 键 词： | 800 MPa 相变诱发塑性钢 热处理工艺 残余奥氏体 |
Microstructure and Properties of 800 MPa Cold Rolled TRIP Steel |
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| LIU Qiang,TANG Di,JIANG Hai-tao,LIU Ren-dongCorp.,Anshan ,China). Microstructure and Properties of 800 MPa Cold Rolled TRIP Steel[J]. Materials For Mechanical Engineering, 2009, 0(10) |
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| Authors: | LIU Qiang TANG Di JIANG Hai-tao LIU Ren-dongCorp. Anshan China) |
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| Affiliation: | LIU Qiang1,TANG Di1,JIANG Hai-tao1,LIU Ren-dong2(1.National Engineering Research Center for Advanced Rolling Technology,University of Science and Technology Beijing,Beijing 100083,China,2.Research and Development Center,Anshan Iron and Steel(Group)Corp.,Anshan 114001,China) |
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| Abstract: | 12 kind of annealing processes were worked out based on the CCT curves of the new developed 800 MPa(TRIP) steel which were determined by full automatic thermal simulation machine.The optimal heat treatment process was found out after the mechanical properties of testing steels annealed with different processes were obtained by tension tests.The microstructure of the steel treated with the optimal annealing process and the mechanical stability of the retained austenite were investigated.The results show that... |
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| Keywords: | 800 MPa TRIP steel heat treatment process retained austenite |
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