In this study, the function of rare earth (RE) oxides added in boronizing agents was studied by analyzing not only the boronized titanium (Ti6Al4V) but also the agent materials at 900–1050 °C. XRD results showed that low-melting-point RE borates were formed in the boronizing processes. The existence of the RE borates probably provided a partially liquid boronizing environment for the titanium alloys. By scaling up the boronizing process for larger samples, not only borides but also carbides were formed on the samples indicating a borocarburizing process occurring. The boronized alloys showed excellent mechanical properties (Vickers hardness 1800HV0.1, Rockwell hardness 95–98 HR15Y up to 900 °C, tensile strength 941 MPa, fiction coefficient 0.15, friction bonding strength >300 N) and a good burner rig thermal shock performance (without spallation of surface oxide).

中文翻译：

---

钛合金稀土渗硼工艺研究

在这项研究中，通过分析硼化钛 (Ti6Al4V) 和 900–1050 °C 的硼化剂材料，研究了添加到硼化剂中的稀土 (RE) 氧化物的功能。XRD 结果表明在渗硼过程中形成了低熔点稀土硼酸盐。稀土硼酸盐的存在可能为钛合金提供了部分液态渗硼环境。通过扩大较大样品的渗硼过程，不仅在样品上形成硼化物而且还形成碳化物，表明发生了硼渗碳过程。硼化合金显示出优异的机械性能（维氏硬度 1800HV0.1，洛氏硬度 95-98 HR15Y 高达 900 °C，抗拉强度 941 MPa，摩擦系数 0.15，摩擦结合强度 >