时效时间对低密度超高锰铸钢组织性能的影响

doi:10.13251/j.issn.0254-6051.2021.08.022

金属热处理 ›› 2021, Vol. 46 ›› Issue (8): 115-120.DOI: 10.13251/j.issn.0254-6051.2021.08.022

时效时间对低密度超高锰铸钢组织性能的影响

高志喆¹, 程福超¹, 冯一帆², 孙健³, 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;
3.鞍钢集团矿业有限公司, 辽宁鞍山 114004

收稿日期:2021-04-05 出版日期:2021-08-25 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:高志喆(1964—),男,教授级高工,主要研究方向为耐磨材料的制备与加工,E-mail:1119898759@qq.com。

Effect of aging time on microstructure and properties of a low density ultra-high manganese cast steel

Gao Zhizhe¹, Cheng Fuchao¹, Feng Yifan², Sun Jian³, Wang Yongjin²

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

Received:2021-04-05 Online:2021-08-25 Published:2021-12-09

摘要/Abstract

摘要： 为了提高传统高锰钢的初始硬度和强度,设计一种低密度超高锰铸钢,水韧处理后在550 ℃分别保温1~4 h时效处理,研究保温时间对试验钢组织性能的影响。试验结果显示:当时效保温时间为2 h,试验钢的综合力学性能最佳,其抗拉强度为1041.7 MPa,屈服强度为1002.7 MPa,断后伸长率为17.6%,冲击吸收能量(V型缺口)为62.0 J,硬度为268.5 HBS;与仅水韧处理相比屈服强度提高了107.3%,硬度提高了28.8%。试验钢强度和硬度的提升主要来自于纳米级κ碳化物的析出强化。

关键词: 超高锰钢, 低密度, 时效处理, 显微组织, 力学性能

Abstract: To improve the initial hardness and strength, an low density ultra-high manganese cast steel was designed. After water toughening, the tested steel was carried out aging treatment at 550 ℃ for 1-4 h and the effect of aging time on microstructure and properties was investigated. The experimental results show that the tested steel can obtained optimum mechanical properties after aging for 2 h. Its tensile strength is 1041.7 MPa, yield strength is 1002.7 MPa, elongation is 17.6%, impact absorbed energy (V-notch) is 62.0 J, and hardness is 268.5 HBS. Compared with the as-water toughened, the yield strength and the hardness of the steel are increased by 107.3% and 28.8% respectively, which can be attributed to the precipitation-hardened effect originating from the precipitation of nano-sized κ-carbides.

Key words: ultra-high manganese steel, low density, aging treatment, microstructure, mechanical properties

中图分类号:

TG142.1

高志喆, 程福超, 冯一帆, 孙健, 王永金. 时效时间对低密度超高锰铸钢组织性能的影响[J]. 金属热处理, 2021, 46(8): 115-120.

Gao Zhizhe, Cheng Fuchao, Feng Yifan, Sun Jian, Wang Yongjin. Effect of aging time on microstructure and properties of a low density ultra-high manganese cast steel[J]. Heat Treatment of Metals, 2021, 46(8): 115-120.

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时效时间对低密度超高锰铸钢组织性能的影响

Effect of aging time on microstructure and properties of a low density ultra-high manganese cast steel

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