Characterization of microstructure obtained by quenching and partitioning process in low alloy martensitic steel
Characterization of microstructure obtained by quenching and partitioning process in low alloy martensitic steel
复制标题
低合金马氏体钢淬火和配分工艺获得的显微组织表征
DOI：
10.1016/j.msea.2010.02.020
复制
发表时间：
2010-06
期刊：
影响因子：
6.4
通讯作者：
Dong, H.
中科院分区：
文献类型：
--
作者：
Wang, C. Y.;Shi, J.;Cao, W. Q.;Dong, H.
采用扫描电镜（SEM）、透射电镜（TEM）、电子离子束衍射（EBSD）和x射线衍射（XRD）等手段对淬火配分（Q&P）低合金马氏体钢的组织进行了表征。采用单轴拉伸试验测定了经Q&P处理的钢和经Q&T淬火回火处理的钢的力学性能。研究表明，显微组织主要由初始马氏体、新鲜马氏体和残余奥氏体三相组成。在第一步淬火时形成的初始马氏体容易蚀刻；最后淬火阶段形成新的马氏体，形状为“块状”相，尺寸约为0.2 ~ 3μm，残余奥氏体主要位于包状晶界和初始奥氏体晶界。这些相的体积分数和碳含量与Speer提出的约束副平衡（CPE）模型的预测结果略有不同，这可以通过首次淬火后未转变奥氏体的不同晶粒尺寸的影响来解释。Q&P加工的钢的力学性能比Q&T加工的钢具有更高的强度和延展性。结果表明，Q&P工艺是一种很有前途的方法，可以控制由硬基体和延性残余奥氏体组成的多相组织，从而获得良好的强度和延性结合。
Microstructure of low alloy martensitic steel treated by quenching and partitioning (Q&P) process was characterized by means of SEM, TEM, EBSD and XRD. Mechanical properties of steel processed by Q&P and the same steel processed by quenching and tempering (Q&T) were measured by uniaxial tensile test. The study suggests that microstructure is mainly composed of three phases, i.e. initial martensite, fresh martensite and retained austenite. The initial martensite formed at the first quenching step is easily etched; the fresh martensite is formed at the final quenching step and looks like ‘blocky’ type phase with size about 0.2–3μm, and the retained austenite is mainly located on the packet boundary and initial austenite grain boundary. The measured volume fractions and carbon contents of these phases were slightly different from those predicted by the constrained paraequilibrium (CPE) model proposed by Speer, which was interpreted by the effects of the different grain sizes of the untransformed austenite after first quenching. Mechanical properties of steels processed by Q&P assume much higher strength and ductility than those processed by Q&T. It is concluded that Q&P process is a promising approach to control the multiphase structure with hard matrix and a ductile retained austenite, which gives an excellent combination of strength and ductility.
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DOI：
10.5860/choice.43-6550
发表时间：
2005-08
期刊：
--
影响因子：
--
作者：
G. Krauss
通讯作者：
G. Krauss
影响因子：
10.9
作者：
Xu Wang;Sigen Wang
通讯作者：
Xu Wang;Sigen Wang
影响因子：
1.8
作者：
S. Zwaag;Lie Zhao;S. O. Kruijver;J. Sietsma
通讯作者：
S. Zwaag;Lie Zhao;S. O. Kruijver;J. Sietsma
DOI：
10.4028/www.scientific.net/msf.426-432.1089
发表时间：
2003-01-01
期刊：
THERMEC'2003, PTS 1-5
影响因子：
--
作者：
Matlock, DK;Bräutigam, VE;Speer, JG
通讯作者：
Speer, JG
影响因子：
1.8
作者：
SUGIMOTO, K;USUI, N;HASHIMOTO, S
通讯作者：
HASHIMOTO, S