金属热处理 ›› 2023, Vol. 48 ›› Issue (11): 90-95.DOI: 10.13251/j.issn.0254-6051.2023.11.014

• 工艺研究 • 上一篇    下一篇

奥氏体化温度对1.2367热作模具钢显微组织及性能的影响

杜思敏1,2, 陈文雄1,2, 王洪利1,2, 胡峰荣3, 任金桥3, 周志明4   

  1. 1.成都先进金属材料产业技术研究院股份有限公司, 四川 成都 610303;
    2.海洋装备用金属材料及其应用国家重点实验室, 辽宁 鞍山 114009;
    3.攀钢集团江油长城特殊钢有限公司技术中心, 四川 江油 621700;
    4.重庆理工大学 材料科学与工程学院, 重庆 400054
  • 收稿日期:2023-06-20 修回日期:2023-09-01 出版日期:2023-11-25 发布日期:2023-12-27
  • 作者简介:杜思敏(1986—),女,高级工程师,主要研究方向为特殊钢及特种合金的热加工及热处理工艺,E-mail:2926747855@qq.com

Effect of austenitizing temperature on microstructure and properties of 1.2367 hot working die steel

Du Simin1,2, Chen Wenxiong1,2, Wang Hongli1,2, Hu Fengrong3, Ren Jinqiao3, Zhou Zhiming4   

  1. 1. Chengdu Advanced Metal Materials Industry Technology Research Institute Co., Ltd., Chengdu Sichuan 610303, China;
    2. State Key Laboratory of Marine Equipment Made of Metal Material and Application, Anshan Liaoning 114009, China;
    3. Technical Center of Pangang Group Jiangyou Great Wall Special Steel Co., Ltd., Jiangyou Sichuan 621700, China;
    4. School of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400054, China
  • Received:2023-06-20 Revised:2023-09-01 Online:2023-11-25 Published:2023-12-27

摘要: 通过热力学计算并采用光镜、扫描电镜、X射线衍射仪、洛氏硬度计及冲击试验机等,研究了奥氏体化温度对1.2367热作模具钢显微组织及性能的影响。结果表明,1.2367钢的室温平衡组织为铁素体基体上分布着M23C6、M6C和MC型碳化物,而在1025~1080 ℃之间淬火时,随着奥氏体化温度的升高碳化物逐渐减少、残留奥氏体量逐渐增加,淬火态组织为马氏体+碳化物+残留奥氏体。在615 ℃保温2 h两次回火后的组织为回火马氏体+碳化物,随奥氏体化温度的升高,硬度逐渐增加,最高硬度达49.05 HRC,冲击吸收能量逐渐降低。1050 ℃淬火+615 ℃回火后,1.2367热作模具钢可获得最佳强韧性匹配。

关键词: 1.2367热作模具钢, 奥氏体化温度, 组织, 性能

Abstract: Effect of austenitizing temperature on microstructure and properties 1.2367 hot working die steel was studied by means of thermodynamic calculation, optical microscope, scanning electron microscope, X-ray diffractometer, Rockwell hardness tester and impact testing machine. The results show that the room temperature equilibrium structure of the 1.2367 steel is distributed with M23C6, M6C and MC carbides on the ferrite matrix, while when quenched between 1025 ℃ and 1080 ℃, the carbide content gradually decreases and the retained austenite content gradually increases with the increase of austenitizing temperature, and the quenched microstructure is martensite+carbides+retained austenite. After twice rounds of tempering at 615 ℃ for 2 h, the microstructure is tempered martensite+carbides, and with the increase of austenitizing temperature, the hardness gradually increases, with the maximum hardness of 49.05 HRC, but the impact absorbed energy gradually reduces. After quenching at 1050 ℃ and tempering at 615 ℃, the 1.2367 hot working die steel can achieve the best strength and toughness matching.

Key words: 1.2367 hot working die steel, austenitizing temperature, microstructure, properties

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