20Cr2Ni4A钢和17Cr2Ni2MoVNb钢渗碳层的组织与性能

doi:10.13251/j.issn.0254-6051.2022.05.027

金属热处理 ›› 2022, Vol. 47 ›› Issue (5): 166-170.DOI: 10.13251/j.issn.0254-6051.2022.05.027

20Cr2Ni4A钢和17Cr2Ni2MoVNb钢渗碳层的组织与性能

朱旭¹, 陈建文¹, 蒋亦舟¹, 刘克¹, 罗子相², 高毅强², 向臻东¹

1.江麓机电集团有限公司, 湖南湘潭 411100;
2.湘潭大学材料科学与工程学院, 湖南湘潭 411105

收稿日期:2021-10-09 修回日期:2022-01-10 出版日期:2022-05-25 发布日期:2022-06-16
通讯作者: 刘克,正高级工程师,硕士生导师,E-mail: 149008871@qq.com
作者简介:朱旭(1989—),女,工程师,主要研究方向为金属材料热处理,E-mail: 527776296@qq.com。

Microstructure and properties of carburized layer of 20Cr2Ni4A steel and 17Cr2Ni2MoVNb steel

Zhu Xu¹, Chen Jianwen¹, Jiang Yizhou¹, Liu Ke¹, Luo Zixiang², Gao Yiqiang², Xiang Zhendong¹

1. Jianglu Machinery & Electronics Group Co., Ltd., Xiangtan Hunan 411100, China;
2. School of Materials Science and Engineering, Xiangtan University, Xiangtan Hunan 411105, China

Received:2021-10-09 Revised:2022-01-10 Online:2022-05-25 Published:2022-06-16

摘要/Abstract

摘要： 研究了相同热处理工艺下20Cr2Ni4A和17Cr2Ni2MoVNb钢渗碳层的组织和性能特点。结果表明,17Cr2Ni2MoVNb钢的原材料和热处理后的晶粒比20Cr2Ni4A钢的均匀细小,经淬火+低温回火后,20Cr2Ni4A钢心部晶粒度等级为7级,17Cr2Ni2MoVNb钢心部晶粒度等级为8级。渗碳层晶粒呈梯度变化,最外层最粗但仍与心部晶粒尺寸相当;这得益于V、Nb等微量元素形成的碳化物对晶界的钉扎作用,同时因为含有更多的碳化物颗粒使得17Cr2Ni2MoVNb钢的显微硬度略高于20Cr2Ni4A钢。17Cr2Ni2MoVNb钢的渗层比20Cr2Ni4A钢的具有更高的硬度和更多的碳化物使其耐磨性更优。

关键词: 20Cr2Ni4A钢, 17Cr2Ni2MoVNb钢, 渗碳层, 晶粒度, 碳化物, 耐磨性

Abstract: Microstructure and properties of the carburized layers of 20Cr2Ni4A steel and 17Cr2Ni2MoVNb steel under the same heat treatment process were investigated. The results show that the grains of 17Cr2Ni2MoVNb steel before and after heat treatment are finer than that of the 20Cr2Ni4A steel. After quenching and low temperature tempering, the core grain size grade of the 20Cr2Ni4A steel is grade 7, and that of the 17Cr2Ni2MoVNb steel is grade 8. The grain size of the carburized layer changes gradually, and that of the outermost layer in the carburized layer is the biggest but still is the same as the core grain size due to the pinning effect of the carbide formed by trace elements such as V and Nb on the grain boundary. At the same time, more content of the carbide particles make the microhardness of the 17Cr2Ni2MoVNb steel slightly higher than that of the 20Cr2Ni4A steel. The carburized layer of 17Cr2Ni2MoVNb steel has higher hardness and more carbides than that of 20Cr2Ni4A steel, so its wear resistance is better.

Key words: 20Cr2Ni4A steel, 17Cr2Ni2MoVNb steel, carburized layer, grain size, carbides, wear resistance

中图分类号:

TG142.1

朱旭, 陈建文, 蒋亦舟, 刘克, 罗子相, 高毅强, 向臻东. 20Cr2Ni4A钢和17Cr2Ni2MoVNb钢渗碳层的组织与性能[J]. 金属热处理, 2022, 47(5): 166-170.

Zhu Xu, Chen Jianwen, Jiang Yizhou, Liu Ke, Luo Zixiang, Gao Yiqiang, Xiang Zhendong. Microstructure and properties of carburized layer of 20Cr2Ni4A steel and 17Cr2Ni2MoVNb steel[J]. Heat Treatment of Metals, 2022, 47(5): 166-170.

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20Cr2Ni4A钢和17Cr2Ni2MoVNb钢渗碳层的组织与性能

Microstructure and properties of carburized layer of 20Cr2Ni4A steel and 17Cr2Ni2MoVNb steel

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