20Mn舵系锻件内部贯穿性缺陷分析  

Analysis of Penetrating Defects in Rudder Forging 20Mn

作　　者：周预平 陈雄 张庆坤[1] 郭志刚 郭鹏程[1] 马晓兵[1] 王国栋[1] 银明辉 谢梅 

机构地区：[1]武汉重工铸锻有限责任公司技术中心,湖北430084

出　　处：《大型铸锻件》2017年第6期47-48,50,共3页Heavy Casting and Forging

摘　　要：我公司生产的某锻件内部出现贯穿性缺陷。通过电镜扫描、金相检测等手段进行分析研究,结果表明缺陷为氧化铝夹渣。进一步研究发现缺陷产生的原因为:进入钢锭的耐火材料或保护渣在锻造拔长过程中形成了贯穿锻件T、B端的缺陷。The penetrating defects are found in the forging of our company. The defect was determined as alumina slag inclusion after analysis and research by the ways of electron microscope scanning,metallography detection,etc..Through the further study the reason of defect was found： it is the refractory materials or the mould powder entering the ingot that forms the defect through T and B ends of forging in the process of drawing.

关 键 词：20Mn 氧化铝夹渣 断口分析 

分 类 号：TG115[金属学及工艺—物理冶金]