邢泽炳
,
卫英慧
,
翟鹏飞
材料热处理学报
以65Mn钢为研究对象,使用电弧熔敷由WC、TiC和Co组成的硬质合金粉末,在材料表面形成电弧熔敷层.使用光学显微镜,X射线衍射分析仪和扫描电镜观察和分析了电弧熔敷层的组织与结构,并通过显微硬度计和磨粒磨损试验机研究了熔敷层的硬度和耐磨性能.结果表明,电弧熔敷硬质合金可在65Mn钢表面形成与基体结合紧密的耐磨涂层,当涂层中Co、TiC和WC含量分别为45％,20％和35％时,硬质合金涂层表面的平均磨损量仅为未处理65Mn旋耕刀的27％.电弧熔敷可显著提高表层显微硬度,改善表面耐磨性能,提高耕作部件的使用寿命.
关键词:
耕作部件
,
电弧熔敷
,
硬质合金
,
摩擦磨损
J.Q.Zhou
,
X.Ai
,
Z.Q.Li and C.Z.Huang Institute of Mechanical Engineering
,
Shandong University of Technology
,
Jinan 250061
,
China
金属学报(英文版)
A novel ceramic cemented carbide compact insert was developed using hot pressing sintering technique. The surface layers of the sandwich material were ceramic and the middle layer was cemented carbide. The factors that affect the properties of the compact insert were analyzed. Theoretical analyses and experiments indicated that the cemented carbide with greater elastic module and thermal expansion coefficient than ceramic should be used in the sandwich material in order to get high equivalent flexure strength and the geometric parameters of the compact insert are also important to its properties.
关键词:
compact insert
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null
,
null
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null
宁来元
,
金腾
,
李晓静
,
于盛旺
,
申艳艳
,
唐伟忠
,
贺志勇
人工晶体学报
采用MPCVD法,以氢气和四甲基硅烷为先驱气体,YG6硬质合金刀片为基体材料,在不同沉积温度下制备了SiC涂层;并选用致密连续且附着性能优良的SiC涂层作为过渡层制备金刚石涂层.使用场发射扫描电镜、能谱仪和掠X射线衍射仪对SiC涂层和金刚石涂层的形貌和组成进行了分析,并对SiC涂层和金刚石涂层的附着力进行测试.结果表明,随着沉积温度升高,SiC涂层先由团聚在一起的β-SiC微晶相先转变为颗粒状和片状β-SiC,进而转变为团聚在一起的非晶态的SiC晶须;SiC涂层的厚度呈递增、致密度呈现先增强后减弱、表面粗糙度整体呈现先减小后增大、附着力呈先升高后降低的趋势.沉积温度为800℃时制备的片状SiC涂层与硬质合金基体有着良好的结合强度,将其作为过渡层时,能够在硬质合金表面制备出均匀、连续、致密的且附着力良好的金刚石涂层.
关键词:
SiC过渡层
,
金刚石涂层
,
沉积温度
,
硬质合金
