金属加工（热加工）Issue(4)：47-51,5.
40Cr钢行星架盲孔台阶纵向裂纹形成原因分析
Reason analysis of longitudinal cracks on the inter wall of 40Cr steel stuff canister
杨光华1
作者信息
- 1. 宁波津玫科技有限公司 浙江宁波 315480
- 折叠
摘要
Abstract
The longitudinal cracks on the blind hole step of 40Cr steel planetary carrier was analyzed by means of macroscopic crack analysis,chemical composition analysis,metallographic examination and energy spectrum analysis.The results show that the longitudinal cracks on the blind hole step of 40Cr steel planetary carrier are quenching cracks.The reason is that the shape of the planetary carrier makes the cooling of the inner and outer martensite transformation non-isochronous,it leads more structure stress at the blind hole step of the planetary carrier,and when the local tangential tensile stress is greater than the fracture strength of martensite,resulting in quenching cracks.关键词
行星架/纵向裂纹/淬火裂纹/不等时性Key words
planetary carrier/longitudinal crack/quenching crack/non-isochronous引用本文复制引用
杨光华..40Cr钢行星架盲孔台阶纵向裂纹形成原因分析[J].金属加工（热加工）,2024,(4):47-51,5.
