摘要
通过凝胶注模与微波烧结方法制备多孔不锈钢,研究粉末固相含量对浆料和生坯性能的影响,比较冷冻干燥与传统干燥的效果,对比本文制备的多孔不锈钢与PM35多孔模具钢的内部孔隙与宏观性能,并将其用于注塑模型芯。实验结果表明:粉末固相含量为56%时,浆料流动性好,生坯强度高;与传统干燥方法相比,冷冻干燥后的生坯收缩更均匀,不易产生裂纹;与PM35多孔模具钢相比,本文制备的多孔不锈钢具有相近的孔隙形貌、孔隙率、平均孔径和透气率;利用多孔不锈钢型芯制作的注塑件表面粗糙度可达Ra1.1。凝胶注模与微波烧结法制备的多孔不锈钢可以很好地解决困气问题,同时保证注塑件的表面质量,简化模具结构,降低生产成本。
Porous stainless steel was prepared by gel casting and microwave sintering. Effects of solid content on the properties of slurry and green body were studied, and different results between freeze drying and traditional drying were compared. Macroscopic properties and internal porosities of the porous stainless steel were investigated and compared with PM35 porous mold steel, which was then served as injection mold core. The results show that optimum fluidity of slurry and high strength of green body can be accessed when solid content is 56%. Compared with traditional drying, shrinkage of the green body achieved by freeze drying is more uniform, and crack is seldom occurred. Pore morphology, porosity, average pore size and permeability of the porous stainless steel are similar to that of PM35 porous mold steel. Surface rough of injection part that produced via the PSS core can be up to Ral. 1. The porous stainless steel, prepared by gel casting and microwave sintering, can solve trapped gas problem. Meanwhile, it can ensure surface quality of injection parts, simplify mold structure, and reduce production cost.
作者
杨翔鹏
王霏
张际亮
吴树海
黄亦斌
顾永华
江开勇
YANG Xiangpeng WANG Fei ZHANG Jiliang WU Shuhai HUANG Yibin GU Yonghua JIANG Kaiyong(Fujian Provincial Key Laboratory of Special Energy Manufacturing, Xiamen Key Laboratory of Digital Vision Measurement, Huaqiao University, Xiamen 361021, China)
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2017年第5期796-800,共5页
Journal of Materials Science and Engineering
基金
国家自然科学基金资助项目(51605170)
福建省自然科学基金资助项目(2017J01089,2014J01190)
厦门市科技计划资助项目(3502Z20163010)
中央高校基本科研业务费资助项目(JB-ZR1211,JB-ZR1210)
华侨大学研究生科研创新能力培育计划资助项目
关键词
多孔不锈钢
注塑模具
困气问题
凝胶注模
微波烧结
porous stainless steel
injection mold
trapped gas problem
gel casting
microwave slntering
作者简介
杨翔鹏（1992-），男，硕士研究生，研究方向：增材制造。E-mail：1078793493@qq．com。
通讯作者：王霏（1979-），讲师，博士，研究方向：增材制造。E-mail：wangfei@hqu．edu．cn。
