铸铁件在不同冷焊工艺下的金相组织分析  

Metallographic structure analysis of iron castings under different cold welding processes

作　　者：韩强 范成坤 杨恒远 王晓丽 王文明 颜景滨 HAN Qiang;FAN Chengkun;YANG Hengyuan;WANG Xiaoli;WANG Wenming;YAN Jingbin(Weichai Heavy Machinery Co.,Ltd.,Large Bore Material Forming Center,Weifang 261001,Shandong China)

机构地区：[1]潍柴重机股份有限公司大缸径材料成型中心,山东潍坊261001

出　　处：《中国铸造装备与技术》2023年第5期97-99,共3页China Foundry Machinery & Technology

摘　　要：铸铁件在生产中由于各种原因,会产生许多铸造缺陷,通过对铸件进行焊补可以提高铸件成品率,降低生产成本。主要以灰铸铁、球墨铸铁和蠕墨铸铁为母材探究其分别在电火花堆焊和激光熔覆的冷焊工艺下的组织分析,结果显示激光熔覆相较于电火花堆焊,母材与焊材熔合能力较好,焊补质量较好;焊补质量:灰铸铁>蠕墨铸铁>球墨铸铁。Due to various reasons,iron castings may produce many casting defects in production.Welding and repairing castings can improve the yield of castings and reduce production costs.The micro-structure analysis of gray cast iron,nodular cast iron,and vermicular graphite cast iron under cold welding processes of electric spark surfacing and laser cladding has been mainly investigated.The results show that laser cladding has better fusion ability between the base metal and the welding material,and better welding repair quality by comparing to electric spark surfacing;the order of welding repair quality is as follows:gray cast iron is better than vermicular graphite cast iron which is better than ductile iron.

关 键 词：铸铁件 金相组织 堆焊 激光熔覆 

分 类 号：TG143[一般工业技术—材料科学与工程]