The present work reports the effect of addition of 0.2 wt.% C on the microstructure, mechanical properties and dry sliding wear of Fe-0.65 wt.% P-based alloy prepared by hot powder forging. The presence of phosphorus (P) leads to loss of ductility in steels which may be overcome by use of the reported powder forging route as well as addition of C in processing of Fe–P alloys. In this study, the iron-phosphate (master alloy) powder containing 5 wt.% P was prepared by a chemical route. The master alloy powder was then mixed with water-atomized Fe powder, while carbon was added in the form of graphite powder. The mixed powders were filled in a mild steel (M.S) capsule and heated at 1323 K in tubular furnace in the presence of flowing hydrogen atmosphere. The heated capsule was hot-forged at 1323 K and further homogenized at the same temperature for two hours. Strength and hardness increased on addition of 0.20 wt.% carbon in Fe-0.65 wt.% P alloy without loss in ductility. Friction and wear properties under dry sliding wear conditions have also been found to improve with the addition of carbon. Wear results have been discussed and correlated with observed microstructure and mechanical properties.

本工作报道了添加0.2 wt。％C对通过热粉末锻造制备的Fe-0.65 wt。％P基合金的显微组织，机械性能和干式滑动磨损的影响。磷（P）的存在会导致钢的延展性降低，这可以通过使用报道的粉末锻造路线以及在Fe-P合金加工中添加C来克服。在该研究中，通过化学途径制备了含5wt。％P的磷酸铁（母合金）粉末。然后将中间合金粉末与水雾化的铁粉混合，同时以石墨粉的形式添加碳。将混合的粉末填充到低碳钢（MS）胶囊中，并在流动的氢气气氛下在管式炉中于1323 K加热。将加热的胶囊在1323K下热锻，并在相同温度下进一步均质两小时。在Fe-0.65 wt。％P合金中添加0.20 wt。％的碳后，强度和硬度增加，而延展性不会降低。还发现，添加碳可改善干滑动磨损条件下的摩擦和磨损性能。已经讨论了磨损结果，并将其与观察到的微观结构和力学性能相关联。