Cr12钢与YG8硬质合金焊接接头组织及性能研究  

Study of Microstructure and Properties of Welded Joint of Cr12 Steel and YG8 Cemented Carbide

作　　者：罗云萌[1] 马涛[1] 曹峻 LUO Yunmeng;MA Tao;CAO Jun(Shaanxi Railway Institute,Weinan 714000,China;Bureau of science and technology in Rudong County,Rudong 226400,China)

机构地区：[1]陕西铁路工程职业技术学院,陕西渭南714000 [2]如东县科学技术局,江苏如东226400

出　　处：《机械制造与自动化》2018年第6期59-61,共3页Machine Building & Automation

基　　金：陕西铁路工程职业技术学院科研基金项目(KY2017-031)

摘　　要：硬质合金主要用于制造刀具、采掘工具以及整体刀具等双金属结构,切削部分为硬质合金,基体为钢。大部分硬质合金工具是用焊接的办法镶嵌在基体上使用,焊接工艺参数将直接影响焊接接头的组织性能。采用真空钎焊焊接Cr12钢与YG8硬质合金,研究不同钎缝宽度对焊接接头组织及性能的影响。通过试验表明,采用Cu MnCo钎料,在1 070℃温度下真空钎焊,钎缝宽度控制在0.1 mm,所得到的焊接接头抗弯强度最高,组织性能最好。Cemented carbide is mainly used in bimetallic structure,such as the manufacture of cutting tools,mining tools,and overall cutting tools,the cutting part is cemented carbide,the matrix is steel.Most cemented carbide tools are embedded in the matrix by welding methods.The welding parameters directly affect the microstructure and properties of welded joints.This paper uses vacuum brazing of Cr12 steel and YG8 cemented carbide to make a study of the effects of welding joint with different brazing seam width on its microstructures and properties.The test results show that the flexural strength of the welded joint is the highest and the microstructure and properties are the best with CuMnCo solder,vacuum brazing at 1 070℃,and the width 0.1 mm of brazing joint.

关 键 词：CR12钢 YG8硬质合金 真空钎焊 钎缝宽度 性能 

分 类 号：TG454[金属学及工艺—焊接]