Cavitation erosion resistance of NiTi claddings by tungsten inert gas with/without Cu, Nb and Cu + Nb interlayers was investigated. The NiTi-TIG and NiTi-Nb-TIG claddings cannot resist the cavitation erosion due to the presence of cracks and brittle phase Fe₂Ti. The employment of Cu and Cu + Nb interlayers can inhibit the welding cracks and brittle phase Fe₂Ti. The ranking according to the cavitation erosion resistance is NiTi plate > NiTi-Cu-TIG cladding ≈ NiTi-Cu-Nb-TIG cladding > stainless steel. The superior cavitation erosion resistance of NiTi-Cu-TIG and NiTi-Cu-Nb-TIG claddings results from high hardness, superelasticity, no cracks and no brittle Fe₂Ti phases. However, the corrosion resistance of NiTi claddings with Cu and Cu + Nb interlayers is slightly reduced due to the existence of the second phases and pores, compared with the NiTi plate.

研究了有/无Cu，Nb和Cu + Nb夹层的钨极惰性气体对NiTi覆层的抗空蚀性。由于存在裂纹和脆相Fe ₂ Ti ，NiTi-TIG和NiTi-Nb-TIG覆层无法抵抗气蚀。Cu和Cu + Nb中间层的使用可以抑制焊接裂纹和脆相Fe ₂ Ti。根据耐空蚀性的排名为：NiTi板> NiTi-Cu-TIG包层≈NiTi-Cu-Nb-TIG包层>不锈钢。NiTi-Cu-TIG和NiTi-Cu-Nb-TIG覆层具有优异的抗气蚀性能，其原因是硬度高，超弹性，无裂纹且无脆性Fe ₂钛相。但是，与第二层相和孔相比，与第二层相和孔相比，具有Cu和Cu + Nb夹层的NiTi包层的耐蚀性略有降低。