摘要
本文选用TA18钛合金作为实验材料,在箱式电阻炉中加热到750℃进行不同保温时间热氧化处理。利用光学显微镜(OM)、XRD、维氏硬度计、36%~38% HCl溶液浸泡、球盘摩擦磨损等试验手段考察样品组织形貌、物相、显微硬度和耐蚀性。研究结果表明,热氧化后TA18钛合金基体显微组织不变,样品表面形成了氧化层,主要为金红石型的TiO2及少量Al2O3组成。随着热氧化时间延长,金红石型TiO2含量逐渐增多;表面硬度逐渐提高。同时,热氧化可显著改善耐蚀性,210 min是提高TA18钛合金耐蚀性的最佳热氧化时间。
TA18 alloy was chosen as the experimental material in this research. The samples were subjected to a thermal oxidation treatment at 750 ˚C for different time in a conventional muffle furnace under air atmosphere. Optical Microscopy (OM), XRD, micro-hardness tester and immersion test in 36% ~ 38% HCl solution were used to determine the microstructure, phase constituents, micro-hardness and corrosion resistance. The results showed that the microstructure of the matrix of TA18 titanium alloy was unchanged after thermal oxidation, and an oxide layer was formed on the sample surface, mainly composed of TiO2 and a small amount of Al2O3. With the increase of thermal oxidation, the content of rutile TiO2 gradually increased and the surface hardness increased. Meanwhile, thermal oxidation can significantly improve the corrosion resistance, and 210 min is the optimal thermal oxidation time to improve the corrosion resistance of TA18 titanium alloy in 36% ~ 38% HCl solution.
出处
《应用物理》
CAS
2022年第8期490-496,共7页
Applied Physics
