摘要
在钴基合金粉末中添加微量的稀散元素Te(质量分数分别为0、0.5%、1.0%、1.5%、2.0%),采用粉末烧结工艺制备试样.采用HB-3000型布洛维硬度仪、MMW-1立式万能摩擦磨损试验机、万分之一的电子分析天平FA2004、MEF-3金相显微镜、扫描电镜、XRD对其硬度、摩擦系数、磨损量、磨损形貌、金相组织进行分析研究.结果发现:钴基合金粉末中Te质量分数为1.5%时,硬度达到最高、摩擦系数小且曲线稳定、磨损量最低,同时Te的加入能细化合金晶粒、清晰晶界、提高组织致密度、使晶粒间结合更加牢固、产生新的硬质相CoCrWTe,这对提高硬度和耐磨性能起主导作用.
By adding trace quantity of tellurium to cobalt-base alloy powder（mass-fraction of tellurium being 0,0.5%,1.0%,1.5%and 2.0%,respectively）,the samples are prepared by means of powder sintering process.HB-3000 Bloch hardness tester,MMW-1vertical universal friction wear tester,electronic analysis balance FA2004 with ten thousandth accuracy,MEF-3 metallographic microscope,SEM,and XRD are employed to analyse and study their hardness,friction coefficient,abrasion loss,wear appearance,and metallographic structure.It is found that when Te content in cobalt-base alloy powder is 1.5%,the hardness will be the highest,friction coefficient-the lowest and stable,and wear loss-the lowest.Meantime,the addition of Te will make the alloy fine-grained,grain boundary clear,and improve the tissue compactness and solid intergranular coupling,generating new hard phase CoCrWTe that plays a leading role in improving the hardness and wear resistance.
出处
《兰州理工大学学报》
CAS
北大核心
2015年第6期12-16,共5页
Journal of Lanzhou University of Technology
关键词
碲元素
钴基合金粉末
摩擦磨损
tellurium element
cobalt-base alloy powder
frictional wear
