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采用真空感应炉制备316L-50Mn初始合金,然后通过真空环境下Mn升华去合金制备多孔不锈钢,应用SEM、EDS和XRD等对物理真空去合金工艺方法制备的多孔不锈钢进行分析,并研究去合金过程中温度以及时间对孔的形成、发展以及孔的形貌的影响。结果表明,物理真空去合金工艺可以制备多孔不锈钢,其孔隙率为30%~60%,孔径为0.5~3μm,多孔层深度达到15~60μm。真空热处理温度和时间是物理真空去合金制备方法的2个关键因素,处理温度主要通过影响Mn元素挥发和体扩散速率进而影响孔的形貌,而处理时间对多孔层的深度起到主要作用。
The initial 316L-50Mn alloy was prepared by vacuum induction furnace, and then the porous stainless steel was prepared by sublimation of Mn under vacuum environment. The porous stainless steel prepared by physical vacuum desulphurization process was analyzed by SEM, EDS and XRD. The effect of temperature and time on pore formation, development, and pore morphology. The results show that the porous stainless steel can be prepared by physical vacuum deoxidation process. The porosity is 30% -60%, the pore size is 0.5-3 μm, and the depth of porous layer is 15-60 μm. The vacuum heat treatment temperature and time are the two key factors in the physical vacuum preparation of the alloy. The treatment temperature mainly affects the pore morphology by affecting the volatilization of Mn and the bulk diffusion rate, while the treatment time plays a major role in the depth of the porous layer.