TiC/TaC添加剂对WC-Co硬质合金性能改进研究  

Study on Performance Improvement of WC-Co Cemented Carbide by TiC/TaC Additive

作　　者：王泽宇 王洪福[1] 赵文 王光 王海鹏 WANG Ze-yu;WANG Hong-fu;ZHAO Wen;WANG Guang;WANG Hai-peng(College of Mechanical Engineering,North University of China,Taiyuan 030051 China;Nanyang Technological University,Singapore 639798)

机构地区：[1]中北大学机械工程学院,山西太原030051 [2]南洋理工大学,新加坡639798

出　　处：《稀有金属与硬质合金》2019年第1期70-73,共4页Rare Metals and Cemented Carbides

摘　　要：为改善煤矿开采工程中常用截齿因齿头受损而易失效的现状,研究了添加剂TiC、TaC对WC-Co硬质合金齿头相关性能的影响。研究结果显示,处理后的齿头结构硬度(HRA)能够达到87,远高于国家对采煤机截齿标准中的65。由于截齿表面生成大量碳化物,表面相对内部断裂韧性较低,平均断裂韧性大致为15.50 MPa·m^(1/2),内部因大量非碳化物的存在,断裂韧性有所提高,平均为16.31 MPa·m^(1/2)。In order to improve the status quo that the commonly used cutter pick in coal mining engineering is easy to failure due to the damage of the carbide bit,the effects of TiC and TaC additives on the performance of WC-Co cemented carbide bit were studied.The results show that the structural hardness (HRA)of the treated bit can reach 87 ,which is much higher than the national standard of cutter pick of 65.Compared with the interior,the surface fracture toughness of the cutter pick is lower due to the formation of a large number of carbides on the surface,the average fracture toughness is about 15.50 MPa ·m^1/2.The internal fracture toughness is improved due to the presence of a large number of non-carbides,and its average value is 16.31 MPa ·m^1/2.

关 键 词：碳化钛 碳化钽 WC-CO硬质合金 截齿结构 耐磨性 断裂韧性 

分 类 号：TG135.5[一般工业技术—材料科学与工程]