稀土氧化物或合金化元素对Ni－Cr－5S合金物理机械性能和摩擦学性能的影响  

Effects of Rare-Earth Oxude or Alloying Elements on the Physical-Mechanical and Tribological Properties of Ni-Cr-5S Alloy

作　　者：阚存一 刘近朱[1] 张国威[1] 欧阳锦林[1] 

机构地区：[1]中国科学院兰州化学物理研究所固体润滑开放研究实验室

出　　处：《摩擦学学报》1994年第4期289-297,共9页Tribology

基　　金：国家自然科学基金

摘　　要：虽然含硫量为５％（ｗｔ）的Ｎｉ－Ｃｒ－５Ｓ合金的自润滑性能比较好，但由于这种合金中存在着多种ＣｒｘＳｙ型化合物夹杂，故其机械强度受到影响而难以满足实际工况对材料之机械性能和摩擦学性能都比较好的双重要求。为了探求进一步提高Ｎｉ－Ｃｒ－５Ｓ合金综合性能的有效方法，考察了稀土氧化物ＣｅＯ＿２和Ｌａ＿２Ｏ＿３，以及合金化元素铁、钼、铌、钴等对这种合金之物理机械性能和摩擦学性能的影响．结果表明，添加适量的稀土氧化物或合金化元素能够改变Ｎｉ－Ｃｒ－５Ｓ合金的组织结构与组成而使其综合性能得以改善。在此基础上，又研制出一种实用性比较强的九组元ＰＢ合金，其在大气中从室温至６００℃的温度范围内都具有比较高的机械强度和良好的摩擦磨损性能，是一种可以在高温、高速和高负荷条件下使用的自润滑材料。Although the Ni-Cr-5S alloy containing 5 percent sulfur has good self-lubricationproperties,due to many kinds of CrxSy inclusions in this alloy,the mechanical strength of the alloyis lower and it is difficult to meet the double requirements of mechanical and tribological propertiesin conventional practice。 In order to find the effective methed for improving the comprehensivebehavior of Ni-Cr-5S alloy,the effects of rare-earth oxides(CeO2 and La2O3) and alloying elements(Fe,Mo,Ni, Co)on the mechanical and tribological properties of Ni-Cr- 5S alloy wereinvestigated. The test results shown that adding proper amount of rare- earth oxide or alloyingelements can change the structure and composition of alloy and then improve its behavior. On thebasis of above work, a PB alloy consisted of nine elements was developed, this alloy has highmechanical strength and good tribological properties from room temperature to 600℃ in the air,andis a self-lubricating material that ean be used under high temperature, high speed and high loadcondiditions.

关 键 词：Ni-Cr-5S合金 稀土氧化物 合金 摩擦学 自润滑 

分 类 号：TG146.15[一般工业技术—材料科学与工程]