理化检验-物理分册
理化檢驗-物理分冊
이화검험-물리분책
Physical Testing and Chemical Analysis Part A:Physical Testing
2015年
11期
802-805,813
,共5页
张关震%丛韬%张弘%张澎湃%付秀琴%张斌
張關震%叢韜%張弘%張澎湃%付秀琴%張斌
장관진%총도%장홍%장팽배%부수금%장빈
铁路轴承%滚子%裂纹%磨削烧伤
鐵路軸承%滾子%裂紋%磨削燒傷
철로축승%곤자%렬문%마삭소상
railway bearing%roller%crack%grinding burn
在某铁路轴箱轴承检修作业时发现其轴承滚子存在宏观裂纹，采用宏观检验、化学成分分析、硬度测试、微观检验的方法对滚子裂纹成因进行了分析。结果表明：轴承滚子裂纹处存在磨削烧伤，引起应力集中；在机械应力和残余应力的共同作用下，磨削烧伤部位产生裂纹并扩展，最终发展为宏观裂纹。
在某鐵路軸箱軸承檢脩作業時髮現其軸承滾子存在宏觀裂紋，採用宏觀檢驗、化學成分分析、硬度測試、微觀檢驗的方法對滾子裂紋成因進行瞭分析。結果錶明：軸承滾子裂紋處存在磨削燒傷，引起應力集中；在機械應力和殘餘應力的共同作用下，磨削燒傷部位產生裂紋併擴展，最終髮展為宏觀裂紋。
재모철로축상축승검수작업시발현기축승곤자존재굉관렬문，채용굉관검험、화학성분분석、경도측시、미관검험적방법대곤자렬문성인진행료분석。결과표명：축승곤자렬문처존재마삭소상，인기응력집중；재궤계응력화잔여응력적공동작용하，마삭소상부위산생렬문병확전，최종발전위굉관렬문。
Macrocracks were found in bearing roller of one railway axle box during the overhaul work.The crack formation cause of the bearing rolling was analyzed by macrographic inspection, chemical compositions analysis,hardness test and micrographic inspection.The results show that grinding burn exsited in the crack area of bearing roller,which led to the stress concentration in this area.Due to the combined action of mechanical stress and residual stress,cracks generated and extended in the grinding burn area,and finally propagated into macrocracks.
