粉末粒径和压制压力对316L不锈钢多孔材料结构特性的影响  

Effects of powder size and molding pressure on structural characterization of 316L stainless steel porous material

作　　者：叶先勇[1] 刘京雷[1] 徐宏[1] 颜磊[1] 郭超[1] 嵇得宸[1] 

机构地区：[1]华东理工大学化学工程国家重点实验室,上海200237

出　　处：《粉末冶金材料科学与工程》2013年第3期409-414,共6页Materials Science and Engineering of Powder Metallurgy

基　　金：中央高校基本科研业务费专项资金;国家金属材料近净成形工程技术研究中心开放基金(201100B)

摘　　要：以气雾化316L不锈钢球形粉末为原料,通过压制、烧结工艺制备多孔过滤材料。在烧结温度、保温时间等其他制备工艺参数一定的情况下,着重分析粉末粒径、压制压力对多孔材料孔隙度、最大孔径和透过性能的影响规律,建立其相互关系方程。结果表明:多孔材料孔隙度主要受压制压力的影响,随压制压力的增大而减小,孔隙度的1.9倍与压制压力的平方根呈指数关系。相比于压制压力,多孔材料的最大孔径主要受粉末粒径的影响,随粉末粒径的增大而增大,两者之间呈线性关系;多孔材料的相对透气系数受粉末粒径和孔隙度的共同影响。在孔隙度一定的情况下,相对透气系数与粉末粒径的平方呈线性关系。Using air atomized spherical 316L stainless steel powders as raw materials,the porous filter material was prepared by molding pressing and sintering.The effects of powder size and molding pressure on the porosity,maximum pore diameter and permeability of porous materials in the same sintering process were studied,and the relationships between these fabrication factors were established.The results show that the porosity is mostly influenced by press pressure rather than powder size.The porosity decreases with increasing molding pressure.It is demonstrated that the square root of molding pressure and 1.9 times of porosity have an exponential relationship.In contrast to molding pressure,the maximum pore size of porous materials is mostly influenced by powder size and they are demonstrated to have a linear relationship.The permeability of porous materials is influenced by powder size and porosity.When porosity is determined,the permeability and the square of particle size are demonstrated to have a linear relationship.

关 键 词：多孔材料 结构特征 透过性能 316L 

分 类 号：TG142.71[一般工业技术—材料科学与工程]