钎焊金刚石钻头胎体拉伸测试及断面分析  

Tensile test and section analysis on matrix of brazing diamond bit

作　　者：王聪[1] 卜长根[1] 

机构地区：[1]中国地质大学(北京)工程技术学院,北京100083

出　　处：《金刚石与磨料磨具工程》2017年第1期47-50,55,共5页Diamond & Abrasives Engineering

基　　金：中国地质调查局项目(编号:12120113096600)

摘　　要：力学性能是钻头胎体的重要性能,但是用传统方法检测困难。因此设计胎体试样烧结模具,通过钎焊烧结制备拉伸试样,测试其强度并分析断口形貌。结果显示:胎体同基体结合良好;胎体与金刚石表面发生碳化反应;胎体层中的金刚石降低胎体的抗拉强度。试验条件下,加入金刚石后胎体强度最大下降53.8%。Mechanical property is a key performance for matrix of drilling bits,which used to be hard to test.Therefore,a new model is designed for sintering specimen.Then the specimen is used to test tensile strength and analyze fracture morphology.Results show that the matrix bonds well with bits and that there is carbonizing reaction between matrix and diamond surface.It is also found that adding diamonds will decrease the tensile strength of the matrix.In this experiment,adding diamond could decrease the tensile strength of matrix up to by 53.8%.

关 键 词：模具设计 钎焊胎体 抗拉强度 断口分析 

分 类 号：TQ164[化学工程—高温制品工业] TG74[金属学及工艺—刀具与模具]