摘要
基于自制润滑剂制备了预混合铁基粉末冶金材料,并对材料流动性、松装密度、压缩性能、耐腐蚀性、烧结体表征进行了实验测试分析。分析结果表明,优化颗粒表面粗糙度,减少小颗粒数量,都可有效改善预混合粉末冶金材料流动性;通过预混合工艺处理之后,所添加有机物可有效粘结石墨粉与铜粉,以此防止偏析与元素出现一定损失;在生坯致密度最高、孔隙率最低状态下,润滑剂含量则处于最佳形态;烧结时间越长,则预混合铁基粉末冶金材料腐蚀电流越小,表明其耐腐蚀性呈现逐步增强趋势;在润滑剂含量为0.6%时,烧结体密度处于最高状态,高达7.10 g/cm 3,预混合铁基粉末冶金材料作为原料制备生成烧结体的显微结构与组织分布更加均匀。
Premixed iron-based powder metallurgy materials were prepared based on self-made lubricant,and the fluidity,bulk density,compression performance,corrosion resistance and sintered body characterization of the materials were tested and analyzed.The results showed that optimizing the surface roughness of particles and reducing the number of small particles can effectively improve the fluidity of premixed PM materials.After the premixing process,the added organic matter can effectively adhere to the stone toner and copper powder,so as to prevent segregation and element loss.Under the condition of the highest green density and the lowest porosity,the lubricant content was in the best form.The longer the sintering time was,the smaller the corrosion current was,indicating that the corrosion resistance of the premixed iron-based powder metallurgy material was gradually enhanced.When the lubricant content was 0.6%,the density of the sintered body was at the highest state,up to 7.10 g/cm 3.The microstructure and microstructure distribution of the sintered body prepared by premixed iron-based powder metallurgy materials are more uniform.
作者
赵冬梅
Zhao Dongmei(Xuangang Branch,Hebei Industrial Vocational and Technology College,Zhangjiakou 075100,China)
出处
《能源与环保》
2021年第5期179-183,共5页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
基金
2020年度河北张家口市社科联规划课题(2020199)。
关键词
预混合工艺
机械混合工艺
铁基粉末
冶金材料
压缩性能
premixing process
mechanical mixing process
iron base powder
metallurgical materials
compression performance
