烧结温度对316L多孔不锈钢孔结构的影响  

Effect of Sintering Temperature on the Structure of 316L Porous Stainless Steel

作　　者：王静[1] 杨军[1] 朱浪涛[1] 张相召 

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055 [2]西安交通大学材料科学与工程学院,陕西西安710049

出　　处：《材料科学与工程学报》2014年第3期448-451,共4页Journal of Materials Science and Engineering

摘　　要：将316L不锈钢粉、造孔剂(尿素颗粒)和粘结剂(聚乙烯醇溶液)进行混合,压坯后采用高温真空烧结制备出多孔不锈钢。利用真空浸渍法计算不同烧结温度下试样的孔隙率,在金相显微镜下观察试样的孔径分布及孔大小等,采用压汞法测试不同烧结温度下的最大孔径及其渗透性能。结果表明,烧结温度在1200℃时可获得小孔径分布均匀、孔隙贯通性良好的多孔结构;但烧结温度超过1200℃,烧结试样发生孔径的收缩和变形,使得孔隙率减小,多孔材料的渗透性能降低。The 316Lstainless steel powder,pore forming agent(carbamide)and binder(PVA)were mixed,and compacted,and finally high temperature vacuum sintering was performed to obtain porous stainless steel part.The specimen porosity was calculated for different sintering temperature using the Archimedes principle.Pore size distribution and pore structure as well as permeability were investigated by using metallography and mercury intrusion measurements.The results show that sintering at 1200 ℃ can give samples small and uniform pore size and nice pore interconnectivity of porous structure;but with the sintering temperature over 1200℃,the samples is sintered more easily,but exhibiting pore shrinkage and deformation, leading to porosity decrease,and permeability reduction.

关 键 词：烧结温度 孔隙率 孔径 造孔剂 粘结剂 

分 类 号：TG142.71[一般工业技术—材料科学与工程] TF124.5[金属学及工艺—金属材料]