基于07MnNiMoDR钢热处理工艺窗口的热处理工艺

doi:10.13251/j.issn.0254-6051.2021.10.024

金属热处理 ›› 2021, Vol. 46 ›› Issue (10): 137-143.DOI: 10.13251/j.issn.0254-6051.2021.10.024

基于07MnNiMoDR钢热处理工艺窗口的热处理工艺

刘峰^1,2, 庞玉华^1,2, 罗远^1,2, 孙琦^1,2, 王海³, 刘东³

1.西安建筑科技大学冶金工程学院, 陕西西安 710055;
2.陕西省冶金工程技术研究中心, 陕西西安 710055;
3.西北工业大学材料学院, 陕西西安 710072

收稿日期:2021-05-13 出版日期:2021-10-25 发布日期:2021-12-08
通讯作者: 庞玉华,教授,博士,E-mail:pyhyyl@126.com
作者简介:刘峰(1994—),男,硕士,主要研究方向为碳钢的热处理,E-mail:1196287962@qq.com
基金资助:
陕西省重点研发计划(2020GY-253)

Heat treatment process based on 07MnNiMoDR steel heat treatment process window

Liu Feng^1,2, Pang Yuhua^1,2, Luo Yuan^1,2, Sun Qi^1,2, Wang Hai³, Liu Dong³

1. School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an Shaanxi 710055, China;
2. Shaanxi Province Metallurgical Engineering Technology Research Center, Xi'an Shaanxi 710055, China;
3. School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an Shaanxi 710072, China

Received:2021-05-13 Online:2021-10-25 Published:2021-12-08

摘要/Abstract

摘要： 研究了07MnNiMoDR钢淬火和回火制度与晶粒尺寸和多边形铁素体含量的关系,建立了淬火保温时奥氏体尺寸窗口和回火保温时多边形铁素体含量窗口,确定了更为精准的热处理工艺。结果表明:奥氏体晶粒尺寸随淬火温度的升高、保温时间的延长而变大,均匀性存在最佳区间,合理的淬火制度为加热温度(940±10) ℃保温(80±10) min;随回火温度升高,约650 ℃出现多边形铁素体,其含量随回火温度的升高、保温时间的延长而增加,合理的回火制度为:加热温度(665±5) ℃、保温时间(165±15) min。优选后最佳热处理工艺为940 ℃×80 min淬火和660 ℃×180 min回火,最终性能测试结果表明:伸长率、冲击吸收能量和屈服强度相比国标分别提升了40.88%、206.25%和12.1%。

关键词: 07MnNiMoDR钢, 奥氏体晶粒尺寸窗口, 多边形铁素体含量窗口, 最佳热处理工艺, 性能测试

Abstract: Relationship between quenching and tempering prcesses and grain size and polygonal ferrite content of the 07MnNiMoDR steel was studied, and the austenite size window and tempered polygonal ferrite content window during quenching and tempering were established, and a more precise heat treatment process was determined. The results show that the austenite grain size increases with the increase of austenitizing temperature and holding time, and there is an optimal range of uniformity. The reasonable quenching process is heating at (940±10) ℃ and holding for (80±10) min. When the temperature rises, polygonal ferrite appears at about 650 ℃, of which content increases with the increase of tempering temperature and holding time. The reasonable tempering process is heating at (665±5) ℃ for (165±15) min. The optimal heat treatment process consists of quenching at 940 ℃ for 80 min and tempering at 660 ℃ for 180 min. The final performance test results show that the elongation, impact absorbed energy and yield strength are increased by 40.88%, 206.25% and 12.1%, respectively, compared with the national standard.

Key words: 07MnNiMoDR steel, austenite grain size window, polygonal ferrite content window, optimum heat treatment process, performance testing

中图分类号:

TG142.1

刘峰, 庞玉华, 罗远, 孙琦, 王海, 刘东. 基于07MnNiMoDR钢热处理工艺窗口的热处理工艺[J]. 金属热处理, 2021, 46(10): 137-143.

Liu Feng, Pang Yuhua, Luo Yuan, Sun Qi, Wang Hai, Liu Dong. Heat treatment process based on 07MnNiMoDR steel heat treatment process window[J]. Heat Treatment of Metals, 2021, 46(10): 137-143.

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基于07MnNiMoDR钢热处理工艺窗口的热处理工艺

Heat treatment process based on 07MnNiMoDR steel heat treatment process window

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