采用高铬铁基耐磨合金细粉做成药芯焊丝,分别用埋弧堆焊和等离子束堆焊方法制备耐磨试样,对试样的显微组织、硬度分布、耐磨性分别进行研究。实验表明：埋弧堆焊和等离子束堆焊组织具有较明显的区别,埋弧堆焊试样结晶定向性更好,晶粒更细化；埋弧堆焊涂层显微硬度平均值为791 HV0.2,等离子束堆焊涂层显微硬度平均值为774HV0.2,埋弧堆焊涂层的显微硬度分布更均匀；耐干砂磨粒磨损性能埋弧堆焊是等离子束堆焊的1.7倍。
The wear-resistant samples were prepared by submerged arc hardfacing and plasma arc hardfacing process respectively using high chromium iron base alloy fine powder flux-cored wire.The microstructure,hardness distribution,wear resistance of the samples were studied respectively.The experiments show that the microstructure has a significant difference between the submerged arc hardfacing sample and the plasma arc hardfacing sample,crys-tallization stereospecificity of the submerged arc hardfacing sample is better,and its grain is refined;the average mi-crohardness of the submerged arc hardfacing sample is 791 HV0.2 ,the average microhardness of the plasma arc hard-facing sample is 774HV0.2 ,the submerged arc hardfacing sample has more uniform microhardness distribution;the dry sand abrasive wear resistance of the submerged arc hardfacing sample is about 1.7 multiples that of the plasma arc hardfacing sample.
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