Abstract—

Commercially pure titanium Cp-Ti and Ti6Al4V alloy were liquid borided using a borate bath consisting of 70% borax and 30% SiC at 1000°C for 3, 6, and 12 h. The borided materials were characterized by scanning electron microscopy to reveal the produced microstructures. Two kinds of titanium borides were identified by the X-ray diffraction analysis (TiB₂ on the top of the surface followed by TiB whiskers penetrating into the substrate). The kinetics of formation of titanium borides was also investigated. The hardness of titanium borides was measured by means of the Vickers indenter. The generated Ti borides were characterized by high values of surface hardness. The wear resistance of borided materials (at 1000°C for 12 h) was analyzed by measuring the relative mass loss in comparison with that of the untreated materials. In addition, the wear mechanism was elucidated for both borided and untreated materials. As a result, liquid boriding was found efficient for improving the wear resistance of both materials.

中文翻译：

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Cp-Ti和Ti6Al4V合金的液相硼化：硼化物层的表征和摩擦学性能

摘要-

使用由70％的硼砂和30％的SiC组成的硼酸盐浴在1000°C下进行3、6和12 h的液体硼化商业纯钛Cp-Ti和Ti6Al4V合金。通过扫描电子显微镜对硼化的材料进行表征，以揭示所产生的微观结构。通过X射线衍射分析确定了两种硼化钛（TiB ₂在表面的顶部，然后TiB晶须渗透到基底中）。还研究了硼化钛形成的动力学。硼化钛的硬度通过维氏压头测量。生成的钛硼化物的特征是表面硬度高。通过测量与未处理材料相比的相对质量损失，分析了硼化材料的耐磨性（在1000°C下持续12 h）。另外，阐明了硼化和未处理材料的磨损机理。结果，发现液体硼化对于改善两种材料的耐磨性都是有效的。