摘要
压制压力是制造粉末冶金材料的关键工艺因素之一，本文根据45#钢的铁碳配比，选取了5个压制压力（130，260，360，470，600MPa），在其他工艺条件如烧结温度、烧结压力、烧结气氛、保温时间、冷却方式相同的情况下，来考察这5个工艺水平对于粉末冶金钢组织和性能的影响。试验结果表明，随着压制压力的增大，烧结体的晶粒尺寸变小并趋于均匀，材料的冲击断裂方式也由韧性断裂转变为混合断裂方式，同时烧结体的密度、硬度也随着压力的增大而出现先增大后趋于平缓的趋势。
The effect of compaction pressure on the mircrostructure and mechanical properities of Fe--based P/M iron have been studied. The result shows that with the increase of compaction pressure, the sintered specimen grain size diminishes and tends toward homogenization; the material impact fracture way also transforms by the gliding fracture into the mixed brittle fracture and the gliding fracture, simultaneously, the density and hardness of the sintered specimens are observed increasing first and then the trend became smooth.
出处
《中国材料科技与设备》
2009年第5期20-23,共4页
Chinese Materials Science Technology & Equipment
基金
湖南省教育厅科学研究资助项目（06/3002）
关键词
压制压力
粉末冶金钢
Compaction pressure
Fe--based P/M iron
