NiTi wire coating was preplaced on super austenitic stainless steel (904L) for enhancing the surface mechanical property. Melting of NiTi wire of 1 mm diameter formed a clad track on the 904L stainless steel substrate using the TIG cladding process. The influence of TIG current on microstructure, phase formation, micro-hardness and abrasive wear resistance characteristics of the clad surface have been investigated. The maximum average micro-hardness of the NiTi clad layer was 952HV at current of 40 A which is 5.95 times greater than the substrate material 904L. The EDS and XRD study of the NiTi coating layer confirmed the formation of NiTi, NiTi2, and B2 (NiTiFeCr) structure as major constituent phases and some intermetallic (Cr-Fe-Ni) which improved the mechanical properties of the clad layer. The pin on disc type sliding abrasive wear of the NiTi clad layer showed the improvement of wear resistance up to 8.83 times compared to the substrate 904L.

将NiTi丝涂层预涂在超级奥氏体不锈钢（904L）上，以增强表面机械性能。使用TIG包层工艺，直径为1 mm的NiTi丝的熔化在904L不锈钢基板上形成了一条包层轨道。研究了TIG电流对复合表面显微组织，相形成，显微硬度和耐磨性的影响。NiTi包层的最大平均显微硬度在40 A的电流下为952HV，是基板材料904L的5.95倍。对NiTi涂层的EDS和XRD研究证实，形成了NiTi，NiTi2和B2（NiTiFeCr）结构作为主要组成相，并证实了一些金属间化合物（Cr-Fe-Ni）改善了包覆层的机械性能。