气保焊堆焊方法制备的铁基非晶合金涂层  

Iron Based Amorphous Alloy Coating Prepared by CO_2 Welding

作　　者：陈珊珊[1] 樊自拴[1,2] 孙冬柏[1,2] 俞宏英[1,2] 王旭东[1,2] 

机构地区：[1]北京科技大学腐蚀与防护中心表面科学与技术研究所,北京100083 [2]北京科技大学北京腐蚀、磨蚀与表面技术重点实验室,北京100083

出　　处：《中国表面工程》2011年第3期78-82,共5页China Surface Engineering

摘　　要：以一种多元素铁基合金粉芯丝材(含Fe,Cr,B,Ti,C,Mo等)作为堆焊材料,用CO2气体保护焊堆焊的方法在基体A3钢上制备涂层。用X-射线衍射仪检测涂层的晶体结构,DSC分析非晶的起始晶化温度;透射电镜观察涂层的微观组织结构,扫描电镜观察涂层的形貌,并利用显微硬度仪和高温摩擦磨损试验机分别测量涂层的显微硬度和耐磨损性能。结果表明:所制备的涂层均匀致密,与基体结合良好;涂层含有非晶并且非晶的起始晶化温度约为524℃;这种非晶涂层具有较高的硬度和很好的耐磨损性能,近表面的最高硬度达825 HV0.3,耐磨性是A3钢的5.9倍.An iron based powder consisting of Fe,Cr,B,Ti,C,Mo and so on was welded onto A3 steel substrate using CO2 welding to create an amorphous coating.Crystal structure of the coating was studied by XRD,the original crystallization temperature was found via DSC,the microstructure was studied through TEM,the topography of the coatings was observed by SEM and the microhardness and wear resistance were measured using a microhardness tester and a high temperature abrasion machine respectively.The results show that the prepared coatings are even in density and firmly welded to the substrate.The crystallization temperature of the amorphous coating is about 542 ℃.The amorphous coating presents good hardness and wear resistance.The maximum hardness near the surface reaches 825 HV0.3.The wear resistance is 5.9 times than that of the A3 steel.

关 键 词：铁基非晶合金 堆焊 涂层 

分 类 号：TG174.4[金属学及工艺—金属表面处理]