金属热处理 ›› 2022, Vol. 47 ›› Issue (8): 40-45.DOI: 10.13251/j.issn.0254-6051.2022.08.006

• 材料研究 • 上一篇    下一篇

电磁能条件下球化退火过程中GCr15轴承钢碳化物的溶解行为

申丽娟1,2, 谢港生1, 麻永林1, 邢淑清1   

  1. 1.内蒙古科技大学 材料与冶金学院, 内蒙古 包头 014010;
    2.河南省特殊钢材料研究院有限公司, 河南 济源 459000
  • 收稿日期:2022-03-18 修回日期:2022-06-07 出版日期:2022-08-25 发布日期:2022-09-19
  • 作者简介:申丽娟(1986—),女,高级工程师,博士,主要研究方向为磁场对轴承钢的影响,E-mail:490069199@qq.com。
  • 基金资助:
    内蒙古自治区自然科学基金(2020MS05046);内蒙古自治区科技计划(2021GG0096)

Carbide dissolution behavior in GCr15 bearing steel during spheroidization annealing under condition of electromagnetic energy

Shen Lijuan1,2, Xie Gangsheng1, Ma Yonglin1, Xing Shuqing1   

  1. 1. School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou Inner Mongolia 014010, China;
    2. Henan Province Special Steel Materials Research Institute Co., Ltd., Jiyuan Henan 459000, China
  • Received:2022-03-18 Revised:2022-06-07 Online:2022-08-25 Published:2022-09-19

摘要: 对比研究了GCr15轴承钢在传统热场条件下和可控脉冲电磁能条件下,两相区球化退火保温阶段碳化物的演变过程,并采用扫描电镜观察了不同热处理条件下残留碳化物的形貌。结果表明,脉冲电磁能有助于缩短两相区球化退火的保温时间,残留碳化物分布密度由传统热场球化退火60 min后的2.6460 μm-2降低至电磁能球化退火60 min后的0.7839 μm-2。动力学分析认为,外加磁场降低了Gtot,提高了奥氏体的长大速度,促进了碳化物的溶解,缩短了球化退火时间。

关键词: GCr15轴承钢, 可控脉冲电磁能, 球化退火, 碳化物

Abstract: Retained carbide dissolution behavior of the GCr15 bearing steel during holding stage of two-phase zone spheroidization annealing was investigated under traditional heat filed treatment and controllable pulse electromagnetic energy treatment. The morphology of retained carbide under different heat treatments was observed by means of scanning electron microscope. The results show that pulse electromagnetic energy has a great effect on shortening holding time of two-phase zone spheroidization annealing and reduces the number of retained carbide per unit area from 2.6460 μm-2(traditional heat field spheroidization annealed for 60 min)to 0.7839 μm-2(electromagnetic energy spheroidization annealed for 60 min). The kinetic analysis indicates that the applied magnetic field makes the Gtot decrease, and the growth rate of austenite increase, improves the dissolution of carbides, and reduces the spheroidization annealing time.

Key words: GCr15 bearing steel, controllable pulse electromagnetic energy, spheroidization annealing, carbide

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