奥氏体化及回火温度对E550级低温钢组织和性能的影响

doi:10.13251/j.issn.0254-6051.2021.01.012

金属热处理 ›› 2021, Vol. 46 ›› Issue (1): 65-69.DOI: 10.13251/j.issn.0254-6051.2021.01.012

奥氏体化及回火温度对E550级低温钢组织和性能的影响

谢章龙¹, 陈锋², 胡其龙¹, 王兆华²

1.南京钢铁股份有限公司,江苏南京 210035;
2.东南大学江苏省先进金属材料高技术研究重点实验室,江苏南京 211189

收稿日期:2020-06-28 出版日期:2021-01-25 发布日期:2021-01-26
作者简介:谢章龙(1980—),男,工程师,博士,主要研究方向为低温容器用钢产品,E-mail:xzldsy@163.com

Influence of austenitizing and tempering temperature on microstructure and properties of E550 low-temperature steel

Xie Zhanglong¹, Chen Feng², Hu Qilong¹, Wang Zhaohua²

1. Nanjing Iron & Steel Co.,Ltd.,Nanjing Jiangsu 210035,China;
2. Jiangsu Key Laboratory of Advanced Metallic Materials,Southeast University,Nanjing Jiangsu 211189,China

Received:2020-06-28 Online:2021-01-25 Published:2021-01-26

摘要/Abstract

摘要： 利用光学显微镜、扫描电镜、拉伸和冲击试验机等手段,研究了E550级高强度钢850~1000 ℃系列奥氏体化温度下组织演变规律和不同回火温度下的组织性能。建立了奥氏体化温度与奥氏体晶粒尺寸的数学关系模型,模型计算结果与实测值高度吻合。检测了不同奥氏体化温度试板分别在600 ℃和670 ℃回火后的组织和力学性能,结果表明:奥氏体化温度选择880~930 ℃范围得到原奥氏体晶粒均匀细小,配合670 ℃回火,得到的综合性能优良。

关键词: 奥氏体化温度, 回火温度, 晶粒度, 数学模型, 强韧性

Abstract: Microstructure evolution rules of E550 steel austenitized between 850-1000 ℃ and microstructure and properties when quenched and tempered at different temperature were studied by means of OM,SEM,tensile and impact machines.A mathematical model of the relationship between austenitizing temperature and austenite grain size has been established.The results show that the calculated results of the model is in good agreement with the measured values.The microstructure and mechanical properties of the test plates quenched at different temperatures and then tempered at 600 ℃ and 670 ℃ show that prior autstenite grains are fine and uniform when the austenitizing temperature is selected in the range of 880-930 ℃ and a good combination properties can be obtained when tempered at 670 ℃.

Key words: austenitizing temperature, tempering temperature, grain size, mathematical model, strength and toughness

中图分类号:

TG142.1

谢章龙, 陈锋, 胡其龙, 王兆华. 奥氏体化及回火温度对E550级低温钢组织和性能的影响[J]. 金属热处理, 2021, 46(1): 65-69.

Xie Zhanglong, Chen Feng, Hu Qilong, Wang Zhaohua. Influence of austenitizing and tempering temperature on microstructure and properties of E550 low-temperature steel[J]. Heat Treatment of Metals, 2021, 46(1): 65-69.

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奥氏体化及回火温度对E550级低温钢组织和性能的影响

Influence of austenitizing and tempering temperature on microstructure and properties of E550 low-temperature steel

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