淬回火对10Cr5MoVRE钢组织性能的影响及其第二相析出行为

doi:10.13251/j.issn.0254-6051.2021.02.021

金属热处理 ›› 2021, Vol. 46 ›› Issue (2): 125-129.DOI: 10.13251/j.issn.0254-6051.2021.02.021

淬回火对10Cr5MoVRE钢组织性能的影响及其第二相析出行为

石晓霞^1,2, 李晓², 任慧平¹, 靳燕², 贾鹏霞²

1.内蒙古科技大学材料与冶金学院, 内蒙古包头 014010;
2.内蒙古包钢钢联股份有限公司, 内蒙古包头 014010

收稿日期:2020-07-23 出版日期:2021-02-25 发布日期:2021-05-08
作者简介:石晓霞(1984—),女,高级工程师,博士,主要研究方向为油井管,E-mail:409718770@qq.com

Effects of quenching and tempering on microstructure and properties of 10Cr5MoVRE steel and second phase precipitation behavior

Shi Xiaoxia^1,2, Li Xiao², Ren Huiping¹, Jin Yan², Jia Pengxia²

1. College of Materialsand Metallurgy, Inner Mongolian University of Science and Technology, Baotou Inner Mongolia 014010, China;
2. Baogang Steel Federation Co., Ltd., Baotou Inner Mongolia 014010, China

Received:2020-07-23 Online:2021-02-25 Published:2021-05-08

摘要/Abstract

摘要： 以10Cr5MoVRE钢为研究对象,对轧态及淬回火(QT)态试样组织性能进行对比研究,利用TEM和能谱仪对QT态试样析出物进行观察分析。力学性能检测结果表明,QT态试样获得了较好的强韧性配比,相较于轧态试样,QT态试样伸长率提高了93.8%,0 ℃条件下的冲击吸收能量提高了6倍以上。借助SEM观察的轧态及QT态10Cr5MoVRE试验钢低温冲击断口形貌,轧态试样的低温冲击断口形貌为脆性解理断裂,QT态的为韧性韧窝断裂。借助OM观察分析,轧态试样组织为粒状贝氏体而QT态为回火索氏体。QT态10Cr5MoVRE钢第二相析出物的TEM观察分析结果表明,碳化物析出相主要是碳化钒、碳化钼及碳化铬形成的复合相,显微夹杂物析出相则是Al₂O₃、MnS、Ca₃(PO₄)₂及稀土化合物等组成的复合夹杂物。

关键词: 10Cr5MoVRE钢, 淬火+回火, 力学性能, 显微组织, 第二相

Abstract: Taking 10Cr5MoVRE steel as the research object, the microstructure and properties of as-rolled and quenched+tempered(QT) specimens were compared, and the precipitates of quenched+tempered specimens were observed and analyzed by means of TEM and energy spectrometer. The mechanical property test results show that the strength and toughness of the quenched+tempered specimens are matched, and the elongation is increased by 93.8% and the impact abserbed energy under the condition of 0 ℃ is increased by more than 6 times compared with that of the rolled one. With the help of the SEM observation, the low temperature impact fracture morphology of the rolled specimen is brittle cleavage fracture and the quenched+tempered specimen is ductile dimple fracture. By means of OM observation and analysis, the microstructure of the rolled specimen is granular bainite and the quenched+tempered specimen is tempered sorbite. The second phase precipitates of the quenched+tempered 10Cr5MoVRE steel specimen were observed and analyzed by means of TEM and energy spectrometer, the results show that the carbide precipitates are mainly compound phase composed of vanadium carbide, molybdenum carbide and chromium carbide, while the inclusions is composed of Al₂O₃, MnS, Ca₃(PO₄)₂ and rare earth compounds.

Key words: 10Cr5MoVRE steel, quenching+tempering(QT), mechanical properties, microstructure, the second phase

中图分类号:

石晓霞, 李晓, 任慧平, 靳燕, 贾鹏霞. 淬回火对10Cr5MoVRE钢组织性能的影响及其第二相析出行为[J]. 金属热处理, 2021, 46(2): 125-129.

Shi Xiaoxia, Li Xiao, Ren Huiping, Jin Yan, Jia Pengxia. Effects of quenching and tempering on microstructure and properties of 10Cr5MoVRE steel and second phase precipitation behavior[J]. Heat Treatment of Metals, 2021, 46(2): 125-129.

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淬回火对10Cr5MoVRE钢组织性能的影响及其第二相析出行为

Effects of quenching and tempering on microstructure and properties of 10Cr5MoVRE steel and second phase precipitation behavior

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