Abstract Large-area TiC–Ni coating deposited through the overlapping of single-line TIG arc scanning under different welding current exhibited superior uniformity at 0% (end to end) over 50% overlapping. The micro-hardness value measured laterally on the coating showed that the majority of the hardness values are within 500–1500 HV for 50% overlapping, whereas, for 0%, the hardness readings are random. The sliding wear test of the coating executed against SiC abrasive-disc indicated a large discrepancy in the average wear for test specimen with 0% overlapping as compared to 50%. The results indicated the viability of a large-area hard and wear-resistance TiC–Ni coating by the TIG cladding method, which unveiled sufficient constancy in the performance for higher overlapping of TIG arc scanning.

中文翻译：

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TIG电弧扫描重叠形成的大面积TiC-Ni涂层磨损特性的恒定性

摘要 通过单线TIG电弧扫描在不同焊接电流下重叠沉积的大面积TiC-Ni涂层在0％（端到端）重叠率超过50％时表现出优异的均匀性。在涂层上横向测量的显微硬度值表明，对于 50% 的重叠，大多数硬度值在 500-1500 HV 之间，而对于 0%，硬度读数是随机的。对 SiC 磨盘执行的涂层滑动磨损试验表明，0% 重叠与 50% 重叠的试样的平均磨损存在很大差异。结果表明，采用 TIG 熔覆法形成大面积硬质耐磨 TiC-Ni 涂层的可行性，揭示了 TIG 电弧扫描重叠度更高的性能具有足够的稳定性。