作　　者： ; ; ; ;

机构地区： 山东大学材料科学与工程学院材料液态结构及其遗传性教育部重点实验室

出　　处： 《焊接学报》 2006年第9期9-12,共4页

摘　　要： 通过添加Ti/Cu/Ti复合中间层,控制加热温度1 130℃,保温1 h,连接压力15 MPa,实现陶瓷基复合材料TiC-Al2O3与高速钢W18Cr4V的真空扩散连接,TiC-Al2O3/W18Cr4V接头抗剪强度达103 MPa。采用扫描电镜、X射线衍射、电子探针等测试方法分析了TiC-Al2O3/W18Cr4V扩散连接接头的微观组织结构和显微硬度分布。结果表明,Ti/Cu/Ti复合中间层与两侧基体TiC-Al2O3和W18Cr4V发生扩散结合,形成均匀致密、宽度为90μm的扩散过渡区,过渡区显微硬度从3 400 HM逐渐降低到1 000 HM,形成的相结构主要有Ti3Al,CuTi2,Cu和TiC。 Diffusion bonding of ceramic matrix composite TiC-Al_2O_3 and tool steel W18Cr4V was successfully carried out by addition of composite interlayer Ti/Cu/Ti at 1 130 ℃ for 1 h with a pressure of 15 MPa.Shear strength of the bonded TiC-Al_2O_3 /W18Cr4V joint is 103 MPa.Microstructure characteristics and microhardness in the diffusion bonded TiC-Al_2O_3 /W18Cr4V joint were investigated by means of scanning electron microscope,X-ray diffractometry and electron probe microanalysis.The results indicate that Ti/Cu/Ti interlayer has been fully diffused to combine with matrixes including TiC-Al_2O_3 and W18Cr4V and a diffusion transition zone with a thickness of 90 μm is formed.The microhardness from TiC-Al_2O_3 to W18Cr4V across the diffusion transition zone decreases from 3 400 HM to 1 000 HM.The phases formed in the diffusion transition zone are Ti_3Al,CuTi_2,Cu and TiC.

关 键 词： 复合中间层 接头 扩散连接 组织结构

领　　域： [金属学及工艺]