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为了解决特殊工况下运转的机器设备在较宽温度范围内的润滑问题，已有多种镍基、铁基高温自润滑材料问世。但因这些材料的综合性能不够好，尚难满足有关场合下的实用要求。因此，在以往研制Ｎｉ－Ｃｒ合金的基础上，通过对多种含硫量不同的Ｎｉ－Ｃｒ－Ｓ合金中硫含量与材料摩擦学性能及机械性能之关系的考察，研制成功了一种综合性能比较好的Ｎｉ－Ｃｒ－Ｓ三元合金，其含硫量为５％（ｗｔ）。这种合金在常温下的抗压强度为０．８８ＧＰａ，冲击强度为０．３３×１０５Ｎ·ｍ／ｍ２，在５００℃下的摩擦系数为０．３１，磨损率为１５．８×１０（－１４）ｍ３／（Ｎ·ｍ）。组织结构分析发现，合金中硫与铬形成了多种ＣｒｘＳｙ［ｘ／ｙ＝（２／３）－１］型的化合物。这些化合物既能在合金摩擦面富集成膜，又能在偶件摩擦面形成转移膜，因而这种Ｎｉ－Ｃｒ－Ｓ合金具有自润滑性能，此外，合金中的ＣｒｘＳｙ化合物还对偶件材料高速钢表面的元素铁具有催化氧化作用，这也是其具有自润滑性能的重要原因。
In order to solve the special conditions of operation of machinery and equipment in a wide temperature range of lubrication problems, there are a variety of nickel-based, iron-based high temperature self-lubricating material come out. However, due to the comprehensive performance of these materials is not good enough, it is difficult to meet the practical requirements of the relevant circumstances. Therefore, on the basis of previous research on Ni-Cr alloy, through the investigation of the relationship between sulfur content and tribological and mechanical properties of Ni-Cr-S alloys with different sulfur contents, a comprehensive Better performance Ni-Cr-S ternary alloy, the sulfur content of 5% (wt). The compressive strength of this alloy at room temperature is 0.88GPa, the impact strength is 0.33 × 105N · m / m2, the friction coefficient at 500 ℃ is 0.31, the wear rate is 15.8 × 10 (- 14) m3 / (N · m). Tissue structure analysis found that a variety of CrxSy [x / y = (2/3) -1] type compounds were formed from sulfur and chromium in the alloy. These compounds not only can enrich the film on the friction surface of the alloy, but also form the transfer film on the friction surface of the even element. Therefore, the Ni-Cr-S alloy has the self-lubricating property. In addition, the CrxSy compound in the alloy also has high speed Iron on the surface of the steel with catalytic oxidation, which is also an important reason for its self-lubricating properties.