金属热处理 ›› 2025, Vol. 50 ›› Issue (7): 248-254.DOI: 10.13251/j.issn.0254-6051.2025.07.035

• 工艺研究 • 上一篇    下一篇

回火温度对石油套管用Cr-Mo-V钢组织与性能的影响

郭泰瑜1,2,3, 王娇娇1,2,3, 高云哲1,2,3, 赵林林1,2,3, 王健1,2,3, 武晓龙1,2,3, 苏冬艳3, 任可飘1,2,3   

  1. 1.河北河钢材料技术研究院有限公司, 河北 石家庄 050023;
    2.河钢集团有限公司, 河北 石家庄 050023;
    3.河钢股份有限公司, 河北 石家庄 050023
  • 收稿日期:2025-01-13 修回日期:2025-04-28 出版日期:2025-07-25 发布日期:2025-07-28
  • 通讯作者: 王娇娇,工程师,硕士,Email:wangjiaojiao@hbisco.com
  • 作者简介:郭泰瑜(1992—),男,工程师,硕士,主要研究方向为高端热轧产品开发,E-mail:guotaiyu@hbisco.com。
  • 基金资助:
    河北省工信厅“揭榜挂帅”项目(JGK231201);河钢集团重点科技项目(HG2023125)

Effect of tempering temperature on microstructure and properties of Cr-Mo-V steel for oil casing pipe

Guo Taiyu1,2,3, Wang Jiaojiao1,2,3, Gao Yunzhe1,2,3, Zhao Linlin1,2,3, Wang Jian1,2,3, Wu Xiaolong1,2,3, Su Dongyan3, Ren Kepiao1,2,3   

  1. 1. Hebei HBIS Materials Technology Research Institute Co., Ltd., Shijiazhuang Hebei 050023, China;
    2. HBIS Group Co., Ltd., Shijiazhuang Hebei 050023, China;
    3. HBIS Co., Ltd., Shijiazhuang Hebei 050023, China
  • Received:2025-01-13 Revised:2025-04-28 Online:2025-07-25 Published:2025-07-28

摘要: 为提高石油套管的综合力学性能,开发了一种以Cr-Mo-V钢为基础的石油套管用钢。通过光学显微镜(OM)、扫描电镜(SEM)和透射电镜(TEM)、拉伸试验和0 ℃冲击试验,研究了试验钢在930 ℃淬火后经不同温度(500、520、540、560 ℃)回火后的组织与性能。结果表明,Cr-Mo-V钢经回火处理后,得到回火索氏体组织,析出的细小弥散短棒状V(C, N)第二相粒子主要分布于基体。随回火温度升高,试验钢的抗拉强度、屈服强度逐渐降低,冲击吸收能量先升高后降低。最佳回火温度为540 ℃,此时强塑积为23.2 GPa·%,冲击吸收能量为147.7 J,回火后冲击断口扩展区均为细小的韧窝形貌。

关键词: 工具钢, 回火温度, 力学性能, 回火索氏体

Abstract: In order to improve the comprehensive mechanical properties of oil casing pipe, a steel for oil casing pipe based on Cr-Mo-V steel was developed. The microstructure and properties of the tested steel after quenching at 930 ℃ and tempering at different temperatures (500, 520, 540, 560 ℃) were studied by means of optical microscope (OM), scanning electron microscope (SEM), transmission electron microscope (TEM), tensile tests, and 0 ℃ impact tests. The results show that after tempering treatment, the Cr-Mo-V steel obtains tempered sorbite microstructure, and the precipitated fine, dispersed short-rod-like V(C, N) second-phase particles are mainly distributed in the matrix. With the increase of tempering temperature, the tensile strength and yield strength of the tested steel gradually decrease, while the impact absorbed energy first increases and then decreases. The optimal tempering temperature is 540 ℃, at which the strength-ductility product is 23.2 GPa·%, the impact absorbed energy is 147.7 J, and the impact fracture propagation zone after tempering is characterized by fine dimpled morphology.

Key words: tool steel, tempering temperature, mechanical properties, tempered sorbite

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