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5期35-38,共4页

摘　　要： Fe3A1/18-8扩散焊界面不均匀地分布着第二相析出物,特别是交界面处连续分布的析出相族可能直接诱发裂纹,是引起接头失效的重要因素。对Fe3A1/18-8扩散焊接头进行再加热,采用扫描电镜、能谱分析、X射线衍射等对析出相及界面相结构进行分析。结果表明,再加热后界面析出相细化且形状规则,均匀分布于Fe3A1/18-8界面,析出相族消失。界面附近的显微硬度降低,不存在高硬度脆性相。 There unevenly distributed second-phase precipitations at the Fe3A1/18-8 (stainless steel) diffusion bonding interface directly. Especially, the continuous precipitation groups at the boundary could induce welding cracks, which was the main factor caused the failure of the Fe3A1/18-8 diffusion-bonded joint. The Fe3A1/18-8 diffusion-bonded joint was re-heated and the precipitation and phase constituent of the interface were analysed by means of scanning electron microscope, energy dispersive spectrum and X-ray diffraction. The results indicated that the precipitation distributs evenly at the Fe3A1/18-8 diffusion bonding interface due to the effect of re-heating and the precipitation becomes tiny and regular. The continuous precipitation groups are liquated. The microhardness near the Fe3A1/18-8 diffusion bonding interface decreases and there are no higher-microhardness brittle phases after re-heating.

关 键 词： 扩散焊界面 再加热 析出相 相结构

领　　域： [金属学及工艺]