平腕臂底座螺栓断裂分析  

Crack Analysis of Bolt on Basis of Flat Bracket

作　　者：沈冬冬[1] 夏洋[1] 师静蕊[1] 袁泽喜[1] 

机构地区：[1]武汉科技大学耐火材料与冶金国家重点实验室,湖北武汉430081

出　　处：《热加工工艺》2017年第10期256-258,261,共4页Hot Working Technology

摘　　要：采用化学分析、宏观检验、金相组织检验及扫描电镜和能谱分析对平腕臂底座螺栓的断裂现象进行分析。结果表明:高铬碳化物大量析出是造成平腕臂底座螺栓断裂的主要原因。此外,材料表面处的大量夹杂物引起的表面锈蚀以及显微裂纹也是一个重要原因。Using chemical analysis, macroscopic examination, metallographic structure examination, scanning electron microscopy and energy spectrum analysis, the cracking phenomena of the bolt on the basis of fiat bracket was analyzed. The results show that the precipitation of large numbers of high chromium carbides is the main reasons for the crack of the bolt on the basis of the fiat bracket. In addition, the surface corrosion caused by a large number of inclusions in the material surface and micro-cracks are also important reasons

关 键 词：螺栓 断裂 夹杂物 

分 类 号：TG111.91[金属学及工艺—物理冶金]