金属加工（热加工）Issue(3)：107-110,115,5.
Q235B钢下连杆断裂失效分析
Fracture failure analysis of the Q235B steel lower connecting rod
李娜 1马志华 2蔡作新 1黄家路1
作者信息
- 1. 金丰(中国)机械工业有限公司 浙江宁波 315221
- 2. 宁波均普智能制造股份有限公司 浙江宁波 315040
- 折叠
摘要
Abstract
Analysis on the fracture failure reason of the Q235B steel lower connecting rod through the methods such as chemical composition test,hardness testing,impact performance testing,tensile testing,metallographic structure and fracture morphology analysis.The analysis results show that the carbon element of the Q235B part exceeds the stand requirement,and the hardness diatribution aroud the crack defect is uneven and higher than the standard requirement,and the impact performance of the failure part is far less than the stand requirement,The microstructure distribution around the defect is uneven,and the fracture morphology presents cleavage fracture morphology,indicating brittle fracture.The uneven distribution of the microstructure and mechanical properties of the failure part and more defects in the core part,are the main reasons for the cracking of the failure part.关键词
下连杆/断口形貌/断裂/失效分析Key words
lower connecting rod/fracture morphology/fracture/failure analysis引用本文复制引用
李娜,马志华,蔡作新,黄家路..Q235B钢下连杆断裂失效分析[J].金属加工（热加工）,2024,(3):107-110,115,5.
