金刚石绳锯中串珠基体铜镀层与钴基工作层之间结合性能分析  

Analysis on bonding property between copper coating and cobalt-base work layer of diamond bead

作　　者：王艳娇[1] 郭桦[1] 张星[1] 张顺林[1] 

机构地区：[1]华侨大学脆性材料加工技术教育部工程研究中心,厦门361021

出　　处：《金刚石与磨料磨具工程》2013年第3期5-11,共7页Diamond & Abrasives Engineering

基　　金：国家自然科学基金(51175193);长江学者与创新团队发展计划(IRT1063);福建省科技计划项目(2010I0009)

摘　　要：研究了铜镀层厚度对Co基串珠工作层胎体与基体之间结合力的影响。自行设计一套单颗串珠剪切力检测装置,并对工作层与基体之间的剪切力进行测量,以表征工作层与基体之间的结合性能。借助电子探针显微分析仪(EPMA)观察了界面附近的组织显微结构并测定其元素分布。借助扫描电镜(SEM)观察了胎体剥离面的形貌。实验结果表明:采用电镀铜基体烧制成形的串珠,相比无电镀基体的串珠绳锯,可有效地增强基体与工作层之间的结合性能;随着金属镀层厚度的增加,串珠工作层与基体结合面剪切力值和结合强度值呈现增加的趋势,其值与无电镀基体相比分别增加了20.9%～35.4%和31.1%～57%。The effect of copper coating thickness on the bonding force between the cobalt-base work layer and the bead matrix is studied.In order to characterize the combination between the work layer and the bead matrix,a detection apparatus is designed to measure the bonding force.An electron probe micro-analyzer(EPMA) is used to observe the microstructure of the interface and detect the elements distribution in the interface field.A scanning electron microscope(SEM) is applied to observe the morphology of the work layer stripping surface.Results show that the bonding property between the cobalt-base work layer and the bead matrix is largely improved by coating copper on the bead matrix.The shearing force and bonding strength between the cobalt-base work layer and the bead matrix increase with the increase of copper coating thickness.Compared with the case of no copper coating,the values of the shearing force and bonding strength respectively increase by 20.9%-35.4% and 31.1%-57%.

关 键 词：金刚石绳锯 金刚石串珠 钴基结合剂 结合力 

分 类 号：TG174.44[金属学及工艺—金属表面处理]