diffusion zone 扩散区 ; 扩散带 ; 扩散层
Zone III diffusion 扩散三区
Zone I diffusion 扩散一区
Zone II diffusion 扩散二区
heat diffusion zone 热扩散区
diffusion zone cracking 扩散区纹裂
unexposed diffusion zone 未暴露扩散区
Modern analytical methods have been used to investigate the patterns of fusion zone and the diffusion behaviors of elements by tig direct welding and tig with Sn as transition layer welding.
利用现代分析测试手段分别研究了TIG焊直接焊接镁铝和镀锡焊接镁铝的焊缝熔合区形貌，并对其进行了元素扩散行为的分析及比较。
The results of experiments showed that the Nb can raise the depth of diffusion zone, hardness, wear resistance, strength and toughness of the nitriding layer of the matrix steel.
实验结果表明，铌能增加扩散层深度、 硬度及耐磨性，提高渗层的强韧性。
The diffusion zone width of main alloying elements increases and hardness of the friction weld zone near TC4 titanium alloy side improves after post-weld heat treatment.
经焊后回火热处理后，主要合金元素沿焊合区的扩散区宽度增大；焊合区钛合金侧硬度值显著提高。
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