ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2023, Vol. 44 ›› Issue (1): 1-4.DOI: 10.20057/j.1003-8620.2022-00045

• 工艺技术 •    下一篇

20MnCr5 齿轮钢氧含量控制及其对钢的疲劳性能影响

曹红福1,王毛球2,孙鸿平1,何肖飞2,吴韶光1   

  1. 1 江阴兴澄特种钢铁有限公司研究院,江阴 214429;
    2 钢铁研究总院特殊钢研究所,北京 100081
  • 收稿日期:2022-05-29 出版日期:2023-02-01 发布日期:2023-01-20
  • 作者简介:曹红福( 1965 - ) ,男,研究员级高级工程师;

Control of Oxygen Content in 20MnCr5 Gear Steel and Its Effect on Fatigue Performance of Steel

Cao Hongfu1 ,Wang Maoqiu2,Sun Hongping1,He Xiaofei2,Wu Shaoguang1   

  1. 1 Research institute, Jiangying Xingcheng Special Steel Works Co.,Ltd.,Jiangying 214429;
    2 Special Steel Institute, Central Iron and Steel Research Institute, Beijing 100081
  • Received:2022-05-29 Published:2023-02-01 Online:2023-01-20

摘要: 提出了100 t EAF-LF-VD-CC-CR全流程控制齿轮钢氧含量的工艺措施;研究了0.00053%~0.00145%氧含量20MnCr5齿轮钢的旋转弯曲疲劳性能、断口和夹杂物尺寸。结果表明,钢中总氧含量越高,最大夹杂物尺寸也越大,疲劳强度越低,当[O]≤0.0010%时,随[O]降低,疲劳强度升高幅度较小;试验钢在表层不产生疲劳裂纹的临界夹杂物尺寸为21μm,距表面深度30~430μm的浅层区域为相对安全区域,其中的夹杂物很难引起疲劳开裂。

关键词: 氧含量, 20MnCr5 齿轮钢, 疲劳强度, 夹杂物临界尺寸

Abstract: The technological measures to control oxygen content of gear steel in 100 t EAF⁃LF⁃VD⁃CC⁃CR whole process are put forward. The rotary bending fatigue properties, fracture and inclusion size of gear steel 20MnCr5 with oxygen content 0.000 53% ~ 0.001 45% are investigated. The results show that the higher the oxygen content, the larger the size of maximum inclusion and the lower fatigue strength of steel, while [O] ≤0.001 0% ,with [O] decreasing, the fatigue strength of steel decreasing within a narrow range; the critical inclusion size of the test steel without fatigue crack under the surface is 21 μm and the shallow zone 30 ~ 430 μm away from the surface is relatively safe zone, where inclusions are difficult to cause fatigue cracking.

Key words: Oxygen Content;20MnCr5 Gear Steel, Fatigue Strength; Critical Size of Inclusion