理化检验-物理分册2025，Vol.61Issue(4)：55-58,4.DOI:10.11973/lhjy-wl240127
QT500-7球墨铸铁行星架断裂原因
Reasons for fracture of QT500-7 ductile iron planetary carrier
冯志明 1薛文璞 1冯银平 2张沈洁 2王小培 3左毅1
作者信息
- 1. 第一拖拉机股份有限公司,洛阳 471004||国家农机装备产业计量测试中心,洛阳 471004
- 2. 第一拖拉机股份有限公司,洛阳 471004||国家农机装备产业计量测试中心,洛阳 471004||洛阳市机械产品失效分析重点实验室,洛阳 471004
- 3. 第一拖拉机股份有限公司,洛阳 471004
- 折叠
摘要
Abstract
The ductile iron planetary carrier used in tractors cracked after approximately 400 hours of use.The fracture reasons of the planetary carrier were analyzed using macroscopic observation,scanning electron microscopy analysis,mechanical property,testing,metallographic examination.The results show that the mechanical properties of the planetary carrier were lower than the standard requirements,and there were serious casting defects such as slag inclusion,shrinkage,and unsoundness,which destroyed the continuity and density of the internal structure of the casting material,reduced the effective bearing area of the casting,lowered the strength of the parts,and caused stress concentration at the location of casting defects,ultimately led to early brittle fracture of the planetary carrier.关键词
QT500-7球墨铸铁/行星架/铸造缺陷/早期脆性断裂/显微组织/力学性能Key words
QT500-7 ductile iron/planetary carrier/casting defect/early brittle fracture/microstructure/mechanical property分类
通用工业技术引用本文复制引用
冯志明,薛文璞,冯银平,张沈洁,王小培,左毅..QT500-7球墨铸铁行星架断裂原因[J].理化检验-物理分册,2025,61(4):55-58,4.
