研究采用真空感应气雾化(Vacuum Induction Gas Atomization,VIGA)技术制备GH4169合金粉末,系统探究气体温度对粉末特性的影响规律.结果表明,随着气体温度从 100℃升高到 600℃,粉末的粒度分布明显向左移动,D50 由75 μm减小到42 μm.扫描电子显微镜(Scanning Electron Microscope,SEM)分析表明,较高气体温度有助于提高粉末的球形度,减少卫星粉的生成.X射线衍射(X-Ray Diffraction,XRD)分析揭示,气体温度对粉末的物相组成影响不大,但是较高温度下粉末具有更高的结晶度和更大的晶粒尺寸.此外,粉末的流动性随气体温度的升高而显著改善.
Effect of Gas Temperature on the Preparation of GH4169 Alloy Powder by VIGA
The preparation of GH4169 alloy powder by Vacuum Induction Gas Atomization(VIGA)was studied.The effect of gas temperature on the powder properties was systematically investigated.The results show that as the gas temperature increases from 100℃to 600℃,the particle size distribution of the powder moves significantly to the left,and D50 decreases from 75 μm to 42 μm.Scanning Electron Microscope(SEM)analysis shows that higher gas temperature can improve the sphericity of the powder and reduce the formation of satellite powder.X-Ray Diffraction(XRD)analysis reveals that the gas temperature has little effect on the phase composition of the powder,but the powder has higher crystallinity and larger grain size at higher temperatures.In addition,the fluidity of the powder is significantly improved with the increase of gas temperature.
vacuum induction gas atomizationGH4169 alloy powderVacuum Induced Gas Atomization(VIGA)technologygas temperatureparticle size distribution
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