Ti-6Al-4V钛合金黑色氧化膜的制备工艺

Preparation Processes of Black Oxidation Film on Ti-6Al-4V Titanium Alloy

为提高Ti-6Al-4V钛合金表面的消光和耐腐蚀性能，研究了以铬酸盐复合钛为促进剂的黑色氧化膜制备工艺。用扫描电镜、X射线衍射仪等分析了膜层的形貌、结构、组成。用显微硬度计、TPE盐雾试验箱等检测了膜层的硬度、耐蚀性能。结果表明，获得的由锐钛矿型TiO2和部分金红石型TiO2组成的厚为5．0～9．0μm的黑色氧化膜膜层是均匀、稳定，多孔性的。与基体相比，显微硬度和耐腐蚀性能有显著提高，耐腐蚀性能达到七级，满足了武器装备中钛合金部件表面改性处理的要求。

In order to improve the corrosion resistance and extinction performance of Ti-6Al-4V Titanium Alloy, the surface modification technique was used,and the process of making black oxidation film on the surface of Ti-6Al-4V Titanium Alloy was studied. The morphology,structure,and composition of the oxidation film were analyzed by means of scanning electron microscopy and X-ray diffraction. The hardness and corrosion-resistance of the film were evaluated. It was found that the oxidation film on the surface of Ti-6Al-4V Titanium Alloy substrate was uniform, stable, and porous. The results showed that the black oxidation film was 5.0-9.0 μm thick and was composed of anatase TiO2 as the major phase and a small amount of rutile TiO2. Compared with Ti-6Al-4V Titanium Alloy substrate, the micro-hardness and corrosion-resistance has a remarkable increase,with corrosion resistant up to the seventh and can meet the demands of surface modification of the Ti-6Al-4V Titanium Alloy for weapons and equipment.