高氮含量非调质钢的组织与性能

doi:10.13251/j.issn.0254-6051.2023.06.033

金属热处理 ›› 2023, Vol. 48 ›› Issue (6): 186-190.DOI: 10.13251/j.issn.0254-6051.2023.06.033

高氮含量非调质钢的组织与性能

穆相林, 晁月林, 马跃, 孙齐松, 程四华, 刘锟

首钢集团有限公司技术研究院, 北京 100041

收稿日期:2023-01-01 修回日期:2023-05-03 发布日期:2023-08-11
作者简介:穆相林(1992—),男,工程师,硕士,主要研究方向为线棒材产品开发、激光熔覆,E-mail:muxl3614@shougang.com.cn
基金资助:
国家新材料生产应用示范平台建设项目(TC200H01X-5)

Microstructure and properties of non-quenched and tempered steel with high nitrogen content

Mu Xianglin, Chao Yuelin, Ma Yue, Sun Qisong, Cheng Sihua, Liu Kun

Research Institute of Technology, Shougang Group Co., Ltd., Beijing 100041, China

Received:2023-01-01 Revised:2023-05-03 Published:2023-08-11

摘要/Abstract

摘要： 利用EBSD、TEM及性能测试等在45MnVS基础上研究了3种不同钒、氮含量非调质试验钢的组织和性能。结果表明, 通过提高N含量, 可以促进V(C, N)以及VN的析出, 大量细小弥散的析出物作为形核位置促进了珠光体转变, 同时起到了钉扎晶界的作用, 从而获得了显著的晶粒细化效果。高氮非调质钢具有良好的强韧性匹配, 在1150 ℃、保温时间60 min、开轧温度1000 ℃、终轧温度900 ℃的生产工艺条件下, 屈服强度达到580 MPa, 冲击吸收能量达到57 J。

关键词: 非调质钢, 氮, 钒的析出, 晶粒细化

Abstract: Microstructure and properties of three 45MnVS-based non-quenched and tempered steels with different vanadium and nitrogen contents were studied by using EBSD, TEM and performance test, etc. The results show that by increasing the N content, the precipitation of V(C, N) and VN can be promoted, and the significant grain refinement effect can be obtained with a large number of fine and dispersed precipitates as the nucleation sites to promote the pearlite transformation and pin the grain boundary. The high nitrogen non-quenched and tempered steel has good combination of strength and toughness, the yield strength reaches 580 MPa, and the impact absorbed energy reaches 57 J, when it is produced with the process of holding at 1150 ℃ for 60 min, and then initial rolling at 1000 ℃, final rolling at 900 ℃.

Key words: non-quenched and tempered steel, nitrogen, vanadium precipitation, grain refinement

中图分类号:

TG142.1

穆相林, 晁月林, 马跃, 孙齐松, 程四华, 刘锟. 高氮含量非调质钢的组织与性能[J]. 金属热处理, 2023, 48(6): 186-190.

Mu Xianglin, Chao Yuelin, Ma Yue, Sun Qisong, Cheng Sihua, Liu Kun. Microstructure and properties of non-quenched and tempered steel with high nitrogen content[J]. Heat Treatment of Metals, 2023, 48(6): 186-190.

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高氮含量非调质钢的组织与性能

Microstructure and properties of non-quenched and tempered steel with high nitrogen content

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