理化检验-物理分册2024，Vol.60Issue(5)：46-49,4.DOI:10.11973/lhjy-wl202405012
ZG270-500钢转子支撑座断裂原因
Reasons for fracture of ZG270-500 steel rotor support seat
石凤仙 1孙智君1
作者信息
- 1. 中国航发商用航空发动机有限责任公司,上海 200241
- 折叠
摘要
Abstract
During the assembly process of a certain rotor support seat,it was found that it had broken.The reasons for the fracture of the rotor support seat were studied using methods such as macroscopic observation,chemical composition analysis,scanning electron microscopy analysis,metallographic examination and mechanical performance testing.The results show that under the action of assembly bending stress,the rotor support seat experienced brittle overload fracture mainly characterized by cleavage fracture.The presence of casting defects on the fracture surface resulted in stress concentration,which reduced the strength and plasticity of the material.The high carbon element content and coarse grain size of the rotor support seat led to an increase in pearlite content and a decrease in ferrite content in the material,resulted in the appearance of widmanstatten structure and coarse subgrains in the material,ultimately led to brittle fracture of the rotor support seat.关键词
转子支撑座/脆性过载断裂/魏氏组织/碳元素含量/力学性能Key words
rotor support seat/brittle overload fracture/widmanstatten structure/carbon element content/mechanical property分类
通用工业技术引用本文复制引用
石凤仙,孙智君..ZG270-500钢转子支撑座断裂原因[J].理化检验-物理分册,2024,60(5):46-49,4.
