不同制备工艺对金属钛粉微观性质及应用的影响研究

Study on Effect of Different Preparation Processes on the Micro Properties and Application of Titanium Powder

金属钛粉末在增材制造等新型成形方法中得到越来越广泛的应用,目前主要通过熔盐电解法和气体雾化法来制取。借助X射线衍射技术(XRD)、扫描电镜(SEM)、比表面积测试(BET)、热重-差热分析法(TGA-DSC)等检测方法,从物相结构、晶胞参数、微观形貌、表面状态、热稳定性等方面,对采用熔盐电解和气体雾化2种不同工艺制取的金属钛粉的性质和应用进行全面对比分析。结果表明,电解钛粉微观形貌不规则,同一性差,适合作为粉末冶金原料和热还原剂;气雾化钛粉微观形貌为均匀球状,表面不易吸附气体杂质,比表面积为3.69 m^2/g,更适宜作为增材制造的原材料。

Titanium powder is more and more widely used in new forming methods such as additive manufacturing, and it is mainly produced by molten salt electrolysis and gas atomization at present. The properties and applications of titanium powder prepared by the two different preparation processes were comprehensively compared and analyzed by means of X-ray diffraction(XRD), scanning electron microscope(SEM), Brunauer Emmett Teller(BET), thermogravimetry analysis and differential scanning calorimeter(TGA-DSC) from the phase structure, cell parameters, micro morphology, surface state, thermal stability and other aspects. The results show that the morphology of the titanium powder produced by molten salt electrolysis is irregular and the identity is poor, which is suitable for powder metallurgy raw material and thermal reducing agent. And the microstructure of atomized titanium powder is uniform and spherical, and the specific surface area is 3.69 m^2/g, which is more suitable for additive manufacturing.