铸铁表面的合金及强化方法  

Alloying and Hardening Method of Cast Iron Surface

作　　者：刘政军[1] 刘乐昕[2] 刘云秋[1] 林克光[1] 

机构地区：[1]沈阳工业大学,沈阳110023 [2]沈阳工业学院,沈阳110085

出　　处：《焊接学报》2000年第3期70-74,共5页Transactions of The China Welding Institution

摘　　要：提高铸铁表面的耐磨性 ,直接影响到其使用寿命。针对提高铸铁耐磨性的问题 ,介绍了用TIG电弧对涂敷合金元素的灰口铸铁表面进行局部重熔处理 ,找出了电弧电流、电弧移动速度等工艺参数对试样表面性能的影响规律。并在不同条件下 ,对重熔层的相结构、元素分布、显微组织、硬度和耐磨性进行了测试和分析。结果表明 ,用TIG电弧进行重熔处理能使灰口铸铁表面产生多种强化效果 ,尤其是通过合金化后强化效果更好 ,使表面性能有很大提高。To improve wear resistibility of surface cast iron will increase the useful life of grey cast iron directly.This paper presents that local grey cast iron surface is remelted by TIG arc and coated with alloys to incrense the wear resistibility.The influence law of technology parameter of arc current and moving speed etc on surface properties is found.Under different conditions,phase structure,elements distribution,microstructure,hardness and wear resistibility ablut remelting layer are analysed and measured.The resules indicate that grey cast iron surface is strengthened with many kinds of ways by TIG arc local remelting treatment.Expensively,surface alloying hardening effect is best and surface properties are improved remarkably.

关 键 词：局部重熔 钨极氩弧焊 硬度 耐磨性 灰口铸铁 

分 类 号：TG457.12[金属学及工艺—焊接]