采煤斗齿冲击值低原因检测分析  

Analysis of Low Impact Value of Coal Scuttle Teeth

作　　者：成易 CHENG Yi(Mechanical and Electrical Research and Design Institute,Guiyang Guizhou 550002,China)

机构地区：[1]贵州省机电研究设计院,贵州贵阳550002

出　　处：《铸造设备与工艺》2020年第6期45-48,共4页Foundry Equipment & Technology

摘　　要：对采煤斗齿的冲击值低查找原因。通过对斗齿化学成分分析、力学冲击、硬度试验分析、金相组织及冲击断口微观试验分析,发现采煤斗齿硬度值偏高直接影响冲击韧性值偏低;同时原材料中的夹杂物、疏松孔洞缺陷是造成冲击值低的又一因素。A company manufacturing coal scuttle impact value is low,one of the inspection sent to analyze the reason.Through the analysis of chemical composition of bucket teeth,mechanical impact,hardness test,metallographic structure and impact fracture micro test,it is found that the higher hardness of coal scuttles’teeth directly affects the lower impact toughness value,the more inclusions and loose holes in raw materials,which is another factor causing the lower impact value.

关 键 词：斗齿 冲击值 硬度 疏松孔洞 

分 类 号：TG161[金属学及工艺—热处理]