含硫镍合金的研制及其高温摩擦学特性

Study on the Nickel Alloy Containing Sulfide and Its Tribological Properties at High Temperature

采用粉末冶金工艺和中频励磁感应加热高温快速热压成型法，研制出几种含硫和不含硫的镍合金高温自润滑耐磨材料，进而从中筛选出一种在室温和３００℃乃至６００℃都具有较高机械强度和低摩擦、耐磨损的含活性元素Ｓ的多元镍合金．对这种合金在较高速度和较高负荷条件下的摩擦学性能进行了试验研究，并且利用Ｘ射线衍射仪、Ｘ射线光电子能谱仪和Ｘ射线能量色散谱仪等揭示了这种合金的自润滑机理．结果表明：这种含硫镍合金在室温和３００℃下与ＷＣ－Ｎｉ－Ｃｏ－Ｍｏ－ＰｂＯ金属陶瓷对摩时，起润滑作用的主要是ＭｏＳ２和元素Ｃｒ与Ｓ的不定比化合物所形成的复合膜；在５００～６００℃的高温摩擦过程中。

By using powder metallurgical process,middle frequency induction hot pressing method,one kind of multi components nickel alloy containing active sulfur element was developed.The alloy,during rubbing against WC Ni Co Mo PbO metal ceramics,performed well with good self lubricating and mechanical properties at 20 ℃,300 ℃ and 600 ℃, and even better tribological properties under higher speeds and loads.X ray diffraction,X ray photoelectron spectroscopy,X ray energy dispersion analysis spectrometry were used to investigate the self lubricating mechanism of this alloy.It showed that the formation of MoS 2 and chromium sulfide film improvs the self lubricating behavior of the alloy at 20 ℃ and 300 ℃;While at 500 ℃ and 600 ℃,the film consists of chromium sulfide,MoO 3,NiO and transferred PbWO 4 plays an important role in improving the tribological properties.