金属热处理 ›› 2022, Vol. 47 ›› Issue (4): 151-154.DOI: 10.13251/j.issn.0254-6051.2022.04.024

• 工艺研究 • 上一篇    下一篇

不同水韧处理工艺下铌微合金化高锰钢的组织演变和力学性能

于洪军1, 程福超1, 马泽天2, 王永金2, 陈俊豪1, 陈正家1, 宋传颂馨2   

  1. 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:2021-12-16 修回日期:2022-01-14 出版日期:2022-04-25 发布日期:2022-05-19
  • 通讯作者: 王永金,讲师,E-mail:wangyongjin@ustb.edu.cn
  • 作者简介:于洪军(1966—),男,高级工程师,主要研究方向为高锰钢,E-mail:1762018420@qq.com。

Microstructure evolution and mechanical properties of Nb-alloyed high manganese steel under different water toughening processes

Yu Hongjun1, Cheng Fuchao1, Ma Zetian2, Wang Yongjin2, Chen Junhao1, Chen Zhengjia1, Song Chuansongxin2   

  1. 1. Dagushan Pelleting Plant, Anshan Iron & Steel Group Co., Ltd., Anshan Liaoning 114004, China;
    2. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2021-12-16 Revised:2022-01-14 Online:2022-04-25 Published:2022-05-19

摘要: 通过铌微合金化得到了一种具有高强度和高冲击吸收能量的高锰钢。通过研究不同的水韧处理温度和水韧处理保温时间下铌微合金化高锰钢的组织及性能的演变,探究其最佳的水韧处理工艺。结果表明,随着水韧处理温度的上升或水韧处理时间的延长,试验钢中的碳化物不断溶解在奥氏体基体中,由于晶粒不断长大,其强度和冲击吸收能量呈先上升后下降的趋势,当水韧处理温度为1100 ℃,水韧处理时间为1.5 h时,试验钢的强度和韧性达到峰值,抗拉强度为957.7 MPa,屈服强度为415.3 MPa,断后伸长率为57.2%,冲击吸收能量为298 J,硬度为222 HBW,此时试验钢达到最佳的力学性能。

关键词: 铌微合金化, 水韧处理, 高锰钢, 冲击吸收能量, 奥氏体

Abstract: A high manganese steel with high strength and impact absorbed energy was obtained by Nb-alloying, and its microstructure evolution and properties under different water toughening temperatures and time were studied to explore the best water toughening condition. The results show that with the increase of water toughening temperature or time, the carbides in the steel are dissolved in the austenite matrix constantly, while the grains are growing, and the strength and impact absorbed energy of the steel increase firstly and then decrease. When the water toughening temperature is 1100 ℃ and the time is 1.5 h, the strength and impact absorbed energy of the steel reaches the peak value, as the tensile strength, yield strength, elongation, impact absorbed energy and hardness are 957.7 MPa, 415.3 MPa, 57.2%, 298 J and 222 HBW, respectively, showing the optimum mechanical properties.

Key words: Nb-alloying, water toughening, high manganese steel, impact absorbed energy, austenite

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