离心铸造低合金铸铁轧辊表面缺陷分析  

Analysis of Surface Defects in Centrifugal Casting Low Alloy Iron Casting Mill Roller

作　　者：郑爱琴 陈荣东 宋新莉[1] 朱瑞琪 苏海根 方勤波 

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室 [2]湖北金标通用轧辊有限公司

出　　处：《特种铸造及有色合金》2018年第2期189-192,共4页Special Casting & Nonferrous Alloys

摘　　要：借助OM、SEM及体视显微镜,分析了离心铸造低合金铸铁轧辊表面缺陷的微观特征、组织、夹杂物类型及成分等。结果表明,轧辊中存在大量孔洞,孔洞最深可达16.23μm,离心铸造轧辊主要组织是珠光体+渗碳体,基体中有MnS、TiC与VC析出,并存在P偏聚区。结合实际生产工艺分析了离心铸造铸铁轧辊表面锈斑缺陷产生的原因,并提出了改进措施。The microscopic characteristics,microstructure and inclusions of surface defects in centrifugal casting low alloy iron casting mill roller were analyzed by optical microscope and scanning electron microscope,stereoscopic microscopes.The results show that there exist a lot of holes in the mill roller with the depth of 16.23μm.The microstructure is composed of pearlite and cementite,and MnS inclusion and TiC as well as VC precipitates can be observed,and phosphorus segregation zone in the matrix is present.The reasons of the centrifugal casting defects were analyzed according to the production process,and the countermeasures were provided.

关 键 词：轧辊 离心铸造 缺陷 

分 类 号：TG249.4[金属学及工艺—铸造] TG250.6