变形条件对C-Mn钢力学性能的影响机理

doi:10.11896/cldb.20090344

材料导报

2021, Vol. 35

Issue (22): 22146-22150 https://doi.org/10.11896/cldb.20090344

金属与金属基复合材料

变形条件对C-Mn钢力学性能的影响机理

米俊龙¹, 贾涓¹, 宋新莉¹, 王凯², 徐庭栋²

1 武汉科技大学省部共建耐火材料与冶金国家重点实验室,武汉 430081
2 钢铁研究总院,北京 100081

Influence Mechanism of Deformation Conditions on Mechanical Properties of C-Mn Steel

MI Junlong¹, JIA Juan¹, SONG Xinli¹, WANG Kai², XU Tingdong²

1 State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
2 General Institute of Iron and Steel Research, Beijing 100081, China

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摘要借助Gleeble 3500热模拟试验机和Instron 8801试验机对一种C-Mn试验钢进行了高温和室温拉伸试验,测量和计算了试验钢的力学性能,观察了断口形貌和显微组织,分析其力学性能随拉伸温度和应变速率变化的规律及机理。结果表明:随拉伸温度的升高和应变速率的减小,试验钢的屈服强度和抗拉强度逐渐降低,屈强比呈上升趋势;而断面收缩率在720 ℃出现极小值,随应变速率的增加逐渐增大。温度和应力作用引发的杂质原子的非平衡晶界偏聚影响着试验钢的塑性。

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关键词: C-Mn钢高温拉伸力学性能非平衡晶界偏聚

Abstract: Akind of C-Mn tested steel was tested at high temperature and room temperature by the Gleeble 3500 thermal simulation testing machine and the Instron 8801 testing machine. The mechanical properties of the tested steel were measured and calculated, the fracture morphology and microstructure were observed, and the change rule and mechanism of mechanical properties with tensile temperature and strain rate were analyzed. The results show that, with the increase of tensile temperature and the decrease of strain rate, the yield strength and tensile strength of the tested steel gradually decrease, and the yield ratio has an upward trend. The reduction of area appears a minimum at 720 ℃, and it increases with the increase of strain rate. The non-equilibrium grain boundary segregation of impurity atoms caused by temperature and stress affects the plasti-city of the tested steel.

Key words: C-Mn steel stretching at elevated temperature mechanical property non-equilibrium grain boundary segregation

出版日期: 2021-11-25 发布日期: 2021-12-13

ZTFLH:

TG142

基金资助: 国家自然科学基金(51871064)

通讯作者: queenyjj@hotmail.com

作者简介: 米俊龙,武汉科技大学硕士,主要从事金属拉伸力学性能和机理研究。
贾涓,武汉科技大学教授,硕士研究生导师,擅长金属、高分子等各种晶体材料的织构分析与研究。主要从事材料强韧化及各向异性的研究,发表教学科研论文30余篇。

引用本文:

米俊龙, 贾涓, 宋新莉, 王凯, 徐庭栋. 变形条件对C-Mn钢力学性能的影响机理[J]. 材料导报, 2021, 35(22): 22146-22150.
MI Junlong, JIA Juan, SONG Xinli, WANG Kai, XU Tingdong. Influence Mechanism of Deformation Conditions on Mechanical Properties of C-Mn Steel. Materials Reports, 2021, 35(22): 22146-22150.

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http://www.mater-rep.com/CN/10.11896/cldb.20090344 或 http://www.mater-rep.com/CN/Y2021/V35/I22/22146

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