【摘要】 对Fe3Al/Q235扩散焊界面附近元素的分布进行计算并通过电子探针进行测定。结果表明,界面附近Al、Fe元素分布计算值和实测值的扩散趋势一致。随着加热温度和保温时间的增加,Fe3Al/Q235扩散焊界面附近元素的扩散距离增大。Fe3Al/Q235扩散焊界面过渡区宽度与保温时间的关系符合抛物线生长规律,保温时间超过60min后界面过渡区宽度不再明显增加。更多还原

【Abstract】 The element distribution near the Fe₃Al/Q235 diffusion welding interface was calculated and measured by means of electron probe microanalysis. The results indicated that the calculated value of Al and Fe content near the interface was close to the measured value. Element diffusion coefficient in the interface transition zone is larger than that in the base materials Fe3Al and Q235 steel under the same temperature, and the phase structure near the Fe₃Al/Q235 interface is favorable to element diffusion. The diffusion distance of elements near the Fe₃Al/Q235 interface increased with the increasing of the heating temperature and the holding time. The relation between the width of the interface transition zone and the holding time conformed to parabolic growth law. The width of the interface transition zone was not increased obviously when the holding time was longer than 60min.更多还原