【摘要】 本文以Ni-Cr高温合金粉为基,其间添加Mo,B和少量MoS₂。用粉末冶金热压法制备了含不同B和MoS₂添加量的Ni-Cr合金基自润滑材料。借助X射线衍射仪分析了材料结构,用布氏硬度计测试了材料硬度。以研制材料为销样,Al₂O₃陶瓷为盘样,在销-盘式高温摩擦试验机上考察材料在20～700℃温度范围内的摩擦磨损行为。试验结果表明,研制材料主要由Ni基固溶体、Cr₃S₄和MoB 3种相组成。材料硬度随B含量的增加而增加,但高温下其摩擦因数也随之增加。MoS₂添加量为4％（质量分数）的研制材料在20～700℃温度范围内有最佳减摩耐磨综合性能。更多还原

【Abstract】 The Ni-Cr alloy matrix high temperature self-lubrication materials were synthesized byP/M Hot-Pressing the mixture powders of Ni-Cr alloy, Mo, B and MoS₂ as raw materials.The materials and wear debris were analysed by X-ray diffractometer. The fricton coefficientand wear rate of the materials at elevated temperatures were determined in air by means of apin-on-disc tribometer. The results showed that the materials were composed of major nickelsolid solution,minor MoB and trace Cr₃S₄. Increasing the adding amount of B, the hardness ofthe materials increased and its friction coefficient were also increased at high temperature.One of the material （Ni-Cr-Mo-3B-4MoS₂） had better tribological properties. Over a widerange of temperature from 20 to 700 ℃, the friction coefficients of the material were in therange of 0.14～0. 26 and its wear rates were in the range of 1.6×10^-14～12×10^-14 m³/（N·m）.更多还原