Si对中锰钢淬火配分组织和性能的影响

材料研究学报

2011, Vol. 25

Issue (1): 45-50

研究论文

本期目录 | 过刊浏览

Si对中锰钢淬火配分组织和性能的影响

赵晖^1,2, 时捷², 李楠^1,2, 王存宇², 胡劲¹, 惠卫军², 曹文全²

1.昆明理工大学材料科学与工程学院昆明 650093
2.钢铁研究总院结构材料研究所北京 100081

Effects of Si on the Microstructure and Mechanical Property of Medium Mn Steel Treated by Quenching and Partitioning Process

ZHAO Hui ^1,2, SHI Jie ², LI Nan ^1,2, WANG Cunyu ², HU Jin ¹, HUI Weijun ², CAO Wenquan²

1.Faculty of Materials and Metallurgical Engineering, Kunming University of Sci. & Tech., Kunming 650093
2.Central Iron & Steel Research Institute, Beijing 100081

引用本文:

赵晖时捷李楠王存宇胡劲惠卫军曹文全. Si对中锰钢淬火配分组织和性能的影响[J]. 材料研究学报, 2011, 25(1): 45-50.
, , , , . Effects of Si on the Microstructure and Mechanical Property of Medium Mn Steel Treated by Quenching and Partitioning Process[J]. Chin J Mater Res, 2011, 25(1): 45-50.

全文: PDF(1072 KB)

摘要: 将20Mn5钢和20Mn5Si2钢进行淬火和配分(Q&P)工艺处理, 用扫描电镜观测其微观组织, 用X射线法测量残余奥氏体量, 研究了Si对其微观组织和力学性能的影响。结果表明, 试验钢中的奥氏体含量明显高于传统的TRIP钢和Q&P工艺处理钢; 在相同Q&P工艺条件下, 20Mn5Si2钢比20Mn5有较多的残余奥氏体, 析出物数量较少。同时, 20Mn5Si2钢具有较低的屈服强度、较高的抗拉强度和达到28 GPa\%的强塑积。Si的添加提高了中锰钢中残余奥氏体量, 这种奥氏体在拉伸变形过程中的TRIP效应是产生较高抗拉强度高和延伸率的主要原因。

关键词 ：金属材料 , 中锰钢 , 淬火和配分 , TRIP效应 , 硅 , 高强高塑

Abstract：Effects of Si on the microstructure and mechanical property of 20Mn5 steel and 20Mn5Si2 steel processed by quenching and partitioning (Q&P) were investigated. The microstructure characterization and austenite fraction measurement were carried out using scanning electron microscopy and x--rays diffraction. It was found that there is much more austenite fraction in the studied medium manganese steels than that of conventional TRIP steels and steels treated by Q&P process; and under same experimental condition, the austenite fraction in 20Mn5Si2 is significantly higher and fewer precipitated carbides than that in 20Mn5 steel. It was proposed that the larger fractioned austenite in Si--medium Mn steel results in the much lower yield stress and much higher product of tensile strength to elongation than that of the medium Mn steel without Si both processed by quenching and partitioning.

Key words： metallic materials medium Mn steel quenching and partitioning (Q&P) TRIP effects Si high strength and high ductility

收稿日期: 2010-09-15

ZTFLH:

TG115

基金资助:

国家“九七三”计划2010CB630803和“八六三”计划2009AA033401、2009AA03Z519资助项目。

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