淬火温度对中合金马氏体耐磨铸钢组织和性能的影响

doi:10.13251/j.issn.0254-6051.2021.09.023

金属热处理 ›› 2021, Vol. 46 ›› Issue (9): 133-137.DOI: 10.13251/j.issn.0254-6051.2021.09.023

淬火温度对中合金马氏体耐磨铸钢组织和性能的影响

于洪军¹, 陈正家¹, 迟晓明¹, 裴中正², 程福超¹, 许洁², 王永金²

1.鞍山钢铁集团有限公司大孤山球团厂, 辽宁鞍山 114004;
2.北京科技大学材料科学与工程学院, 北京 100083

收稿日期:2021-03-11 出版日期:2021-09-25 发布日期:2021-12-09
通讯作者: 王永金,讲师,博士,E-mail:wangyongjin@ustb.edu.cn
作者简介:于洪军(1966—),男,高级工程师,硕士,主要研究方向为钢铁材料的组织与性能,E-mail:991802665@qq.com。

Effect of quenching temperature on microstructure and mechanical properties of a medium alloy martensitic wear-resistant cast steel

Yu Hongjun¹, Chen Zhengjia¹, Chi Xiaoming¹, Pei Zhongzheng², Cheng Fuchao¹, Xu Jie², Wang Yongjin²

1. Dagushan Pelleting Plant of Ansteel Group Co., Ltd., Anshan Liaoning 114004, China;
2. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

Received:2021-03-11 Online:2021-09-25 Published:2021-12-09

摘要/Abstract

摘要： 对自行设计的矿山球磨机衬板用中合金马氏体耐磨铸钢在900、950、1000、1050、1100 ℃淬火后回火,研究了淬火温度对试验钢组织和性能的影响。试验结果表明,经过淬火、回火处理后的试验钢显微组织由板条马氏体和残留奥氏体组成。当保持回火温度250 ℃不变,随着淬火温度的升高,马氏体组织先变细密后又变粗大,抗拉强度、冲击性能及残留奥氏体含量均呈现先增大后减小的趋势,在1050 ℃淬火取得最优综合力学性能:抗拉强度1623 MPa,冲击性能14.4 J,此时试验钢的强化机理为孪晶马氏体和高密度位错缠结。通过冲击磨损试验解释了试验钢在该工艺下的磨损行为与磨损机理。

关键词: 马氏体, 耐磨铸钢, 中合金钢, 淬火, 显微组织

Abstract: A self-designed medium alloy martensitic wear-resistant cast steel was quenched at 900, 950, 1000, 1050, 1100 ℃ then tempered respectively, and the influence of quenching temperature on microstructure and mechanical properties of the tested steel was studied. The results indicate that the microstructure of the tested steel after quenching and tempering is composed of lath martensite and retained austenite. When the tempering temperature is kept constant at 250 ℃, with the increase of quenching temperature, the martensite structure first becomes finer and then coarser, and the tensile strength, impact properties and residual austenite content increase first and then decrease. The tested steel achieves the best comprehensive mechanical properties at 1050 ℃: tensile strength of 1623 MPa, impact property value of 14.4 J, the corresponding strengthening mechanism is twin martensite and high-density dislocation entanglement. And the wear behavior and the wear mechanism of the tested steel under this process are explained by the impact wear test.

Key words: martensite, wear-resistant cast steel, medium alloy steel, quenching, microstructure

中图分类号:

TG156.3

于洪军, 陈正家, 迟晓明, 裴中正, 程福超, 许洁, 王永金. 淬火温度对中合金马氏体耐磨铸钢组织和性能的影响[J]. 金属热处理, 2021, 46(9): 133-137.

Yu Hongjun, Chen Zhengjia, Chi Xiaoming, Pei Zhongzheng, Cheng Fuchao, Xu Jie, Wang Yongjin. Effect of quenching temperature on microstructure and mechanical properties of a medium alloy martensitic wear-resistant cast steel[J]. Heat Treatment of Metals, 2021, 46(9): 133-137.

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淬火温度对中合金马氏体耐磨铸钢组织和性能的影响

Effect of quenching temperature on microstructure and mechanical properties of a medium alloy martensitic wear-resistant cast steel

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