金属热处理 ›› 2020, Vol. 45 ›› Issue (1): 139-142.DOI: 10.13251/j.issn.0254-6051.2020.01.028

• 材料研究 • 上一篇    下一篇

500 MPa级门架型钢的奥氏体晶粒长大行为

高彩茹1, 霍喜伟2, 宋玉卿2, 杜林秀1, 乔鹏1, 屈兵兵1   

  1. 1. 东北大学 轧制技术及连轧自动化国家重点实验室, 辽宁 沈阳 110819;
    2. 山东钢铁股份有限公司莱芜分公司, 山东 莱芜 271104
  • 收稿日期:2019-06-22 出版日期:2020-01-25 发布日期:2020-04-03
  • 作者简介:高彩茹(1962—),女,副教授,博士,主要从事金属材料成型过程组织性能调控与新材料开发,发表文章50多篇,联系电话:024-83686412,E-mail:gaocr@ral.neu.edu.cn。
  • 基金资助:
    国家高技术研究发展计划(863计划)(2015AA03A501)

Austenite grain growth behavior of 500 MPa grade gantry steel

Gao Cairu1, Huo Xiwei2, Song Yuqing2, Du Linxiu1, Qiao Peng1, Qu Bingbing1   

  1. 1. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang Liaoning 11089, China;
    2. Laiwu Branch of Shandong Iron and Steel Ltd., Laiwu Shandong 271104, China
  • Received:2019-06-22 Online:2020-01-25 Published:2020-04-03

摘要: 为探究加热温度和保温时间对500 MPa级门架型钢奥氏体晶粒尺寸的影响,以两种不同成分试验钢为研究对象,采用了SK型管式加热炉分别将试验钢加热到1000~1200 ℃下保温15、30 min,快速冷却后对组织进行观察。结果表明,奥氏体晶粒尺寸随着加热温度的升高和保温时间的延长而长大,Cr元素的添加对奥氏体晶粒的长大具有一定的抑制作用,研究结果对制定大生产加热具有实际指导作用。

关键词: 门架型钢, 加热温度, 保温时间, Cr元素, 奥氏体晶粒

Abstract: In order to study the effect of heating temperature and holding time on the austenite grain size of 500 MPa grade gantry steel, two kinds of tested steels with different compositions were studied. The SK type tubular heating furnace was used to heat the tested steels to 1000-1200 ℃ for 15 min and 30 min respectively. The microstructure was observed after rapid cooling from high temperature and the grain size was determined. The results show that the austenite grain size increases with the increase of heating temperature and holding time, the addition of Cr has a certain inhibitory effect on the growth of austenite grains. The research results have a practical guidance for the development of actual production heating process.

Key words: gantry steel, heating temperature, holding time, Cr element, austenite grain

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