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。
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。
By means of optical microscopy, microhardness testing, X-ray diffractometry (XRD) and scanning electron microscopy (SEM), the oxygen-diffusion zone was characterized in the present paper.
通过金相观察、显微硬度测试、x射线衍射(XRD)及扫描电镜(SEM)分析，研究了渗氧层的结构和性能。
By means of optical microscopy, microhardness testing, X-ray diffractometry (XRD) and scanning electron microscopy (SEM), the oxygen-diffusion zone was characterized in the present paper.
通过金相观察、显微硬度测试、x射线衍射(XRD)及扫描电镜(SEM)分析，研究了渗氧层的结构和性能。
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