热处理工艺对大尺寸1Cr17Ni2钢组织与性能的影响

doi:10.13251/j.issn.0254-6051.2023.12.002

金属热处理 ›› 2023, Vol. 48 ›› Issue (12): 7-12.DOI: 10.13251/j.issn.0254-6051.2023.12.002

热处理工艺对大尺寸1Cr17Ni2钢组织与性能的影响

徐桂芳¹, 刘文通¹, 张伯承^1,2, 宋瑞智¹

1.江苏大学材料科学与工程学院, 江苏镇江 212013;
2.镇江市京口区理工热处理科技服务站, 江苏镇江 212012

收稿日期:2023-07-18 修回日期:2023-09-27 出版日期:2023-12-25 发布日期:2024-01-29
作者简介:徐桂芳(1966—),女,教授,博士,主要研究方向为材料制备与加工,E-mail:gfxu@ujs.edu.cn
基金资助:
江苏省产业前瞻与共性关键技术(BE2017127)

Effect of heat treatment process on microstructure and mechanical properties of large size 1Cr17Ni2 steel

Xu Guifang¹, Liu Wentong¹, Zhang Bocheng^1,2, Song Ruizhi¹

1. School of Materials Science and Engineering, Jiangsu University, Zhenjiang Jiangsu 212013, China;
2. Zhenjiang Jingkou District Heat Treatment Science and Technology Service Station, Zhenjiang Jiangsu 212012, China

Received:2023-07-18 Revised:2023-09-27 Online:2023-12-25 Published:2024-01-29

摘要/Abstract

摘要： 使用光学显微镜(OM)、扫描电镜(SEM)、X射线衍射仪(XRD)、电子万能试验机和金属摆锤冲击试验机对大尺寸1Cr17Ni2钢在常规淬火和应力控制淬火两种工艺下的显微组织和力学性能进行分析。结果表明,两种工艺下1Cr17Ni2钢的组织均由回火马氏体、δ铁素体、细小碳化物和微量残留奥氏体组成,应力控制淬火工艺下的组织更为细小,且残留奥氏体含量相对较多;两种工艺下1Cr17Ni2钢的力学性能优良,抗拉强度、伸长率和冲击吸收能量分别超过1200 MPa、13.5%和31.2 J。应力控制淬火+360 ℃回火后的综合力学性能最优,冲击吸收能量达到96.4 J,比常规淬火+360 ℃回火后的高46.2%。拉伸与冲击断口形貌均表现为韧脆混合断裂,应力控制淬火工艺下的断口韧窝数量较多。

关键词: 1Cr17Ni2钢, 大尺寸, 热处理工艺, 组织与性能

Abstract: Microstructure and mechanical properties of the large size 1Cr17Ni2 steel under two processes of conventional quenching and stress controlled quenching were analyzed by means of optical microscope (OM) , scanning electron microscope (SEM) , X-ray diffractometer(XRD), electronic universal testing machine and metal pendulum impact testing machine. The results show that the microstructure of the 1Cr17Ni2 steel treated by the two processes is composed of tempered martensite, δ ferrite, fine carbide and trace retained austenite, and the microstructure of which under the stress controlled quenching process is finer, while the content of residual austenite is relatively more. Moreover, the mechanical properties of the 1Cr17Ni2 steel treated by the two processes are excellent as the tensile strength, elongation and impact absorbed energy exceeding 1200 MPa, 13.5% and 31.2 J, respectively. The comprehensive mechanical properties of the 1Cr17Ni2 steel after stress controlled quenching and tempering at 360 ℃ is the best, the impact absorbed energy can reach 96.4 J, which is 46.2% higher than that of the conventional quenching and tempering at 360 ℃. Both tensile and impact fracture morphologies of the 1Cr17Ni2 steel show ductile-brittle fracture, and there are more dimples under the stress controlled quenching process.

Key words: 1Cr17Ni2 steel, large size, heat treatment process, microstructure and properties

中图分类号:

TG161

徐桂芳, 刘文通, 张伯承, 宋瑞智. 热处理工艺对大尺寸1Cr17Ni2钢组织与性能的影响[J]. 金属热处理, 2023, 48(12): 7-12.

Xu Guifang, Liu Wentong, Zhang Bocheng, Song Ruizhi. Effect of heat treatment process on microstructure and mechanical properties of large size 1Cr17Ni2 steel[J]. Heat Treatment of Metals, 2023, 48(12): 7-12.

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热处理工艺对大尺寸1Cr17Ni2钢组织与性能的影响

Effect of heat treatment process on microstructure and mechanical properties of large size 1Cr17Ni2 steel

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