TiAl基高温自润滑材料的机械和磨损性能研究  

Study on mechanical and wear properties of TiAl- based high- temperature self- lubricating materials

作　　者：闫昂昂 杨丽颖[1] 吴雅玉 栾加航 

机构地区：[1]济南大学机械工程学院,山东济南250022

出　　处：《制造技术与机床》2015年第12期93-96,共4页Manufacturing Technology & Machine Tool

基　　金：山东省科技发展计划项目(2012GGX10219)

摘　　要：以Ti44Al2Cr8Nb0.5B0.5Al2O3合金粉末为基体材料,添加固体润滑剂62%Ba F2-38%Ca F2共晶体,采用真空热压烧结技术制备抗磨减摩、耐高温、轻质的Ti44Al2Cr8Nb0.5B0.5Al2O3/(62%Ba F2-38%Ca F2)高温自润滑复合材料。研究在600℃高温下、相同接触压力和滑动速度的工况下,62%Ba F2-38%Ca F2共晶体含量对Ti44Al2Cr8Nb0.5B0.5Al2O3/(62%Ba F2-38%Ca F2)高温自润滑复合材料的摩擦磨损性能的影响以及室温工况下,对硬度、相对密度、抗拉强度、延伸率和冲击韧性的影响。结果表明:随着62%Ba F2-38%Ca F2含量增加,复合材料的相对密度逐渐减小,抗拉强度、冲击韧性、硬度以及延伸率均减小,摩擦系数逐渐减小,磨损率先降低后升高。当62%Ba F2-38%Ca F2体积分数为11%时复合材料的磨损率最低,摩擦系数较小,且其机械性能较好。The Ti44Al2Cr8Nb0. 5B0. 5Al2O3 alloy powder as matrix material,the addition of solid lubricants 62%Ba F2- 38% Ca F2 eutectic. The Ti44Al2Cr8Nb0. 5B0. 5Al2O3/（ 62% Ba F2- 38% Ca F2） high- temperature self- lubricating composite material of anti wear and high temperature,lightweight were prepared by vacuum hot pressing technology. Research of influences about friction on 62% Ba F2- 38%Ca F2 eutectic content on Ti44Al2Cr8Nb0. 5B0. 5Al2O3/（ 62% Ba F2- 38% Ca F2） high temperature self- lubricating composite material at 600 ℃ and the same pressure,sliding velocity conditions.And study of the affect on hardness,relative density,tensile strength,elongation and impact toughness at room temperature. The results show that ： with the increasing content of 62 % Ba F2-38 %Ca F2,the relative density of the composite material decreases,the tensile strength,toughness,hardness and extension rate decreases,the friction coefficient decreases and the wear rate increase after the first decrease. When the content of 62 % Ba F2- 38 % Ca F2 is at eleven percent,the wear rate is the lowest and the low friction coefficient is very small with good mechanical properties of composite materials.

关 键 词：TIAL基合金 高温自润滑 机械性能 磨损性能 

分 类 号：TG146[一般工业技术—材料科学与工程]