为促进半高速钢轧辊再制造技术的发展，基于半高速钢的合金体系，研究调整氩弧熔覆粉末中钒的含量对增强熔覆层高温性能和改善焊接工艺性的影响规律。通过工艺试验分析钒添加量对焊缝成形性的影响；通过金相观察、XRD物相分析钒的添加对焊缝组织的影响；通过高温抗氧化试验、红硬性试验检测钒的添加对熔覆层高温情况下的工作特性的影响。试验结果表明：钒的添加能够改善熔覆层成形，提高半高速钢熔覆层的高温抗氧化特性、红硬性和热疲劳性能。

Aim at promoting the development of semi high-speed steel rolls remanufacturing technology, based on the alloy systems of semi high-speed steel, the influences of vanadium addition in argon arc welding powders on the high-temperature properties and weldability of cladding layer were studied.In addition, the effect of vanadium addition on the formability of welding seam was explored throng welding process test.The means of metallographic observation and XRD were employed to study the effect of vanadium addition on the cladding layer microstructure.Furthermore, high temperature oxidation and red hardness tests were carried out to clarify the effect of vanadium addition on the high temperature properties of cladding layer.Results showed that adding vanadium could modify the formability of cladding layers and improve their high-temperature oxidation resistance, red hardness and thermal fatigue resistance.