摘要
本文采用模壁润滑和高速压制相结合工艺在HYP35-7型高速压机上成形Fe-2Cu-1C铁基粉末,研究压制速度对生坯密度、最大冲击力、脱模力和压坯的弹性后效的影响,并分析了压坯的显微组织。结果表明,试样的生坯密度均随压制速度提高而增加,有模壁润滑生坯密度较高,且当压制速度为4.39 m/s,生坯密度达到7.53 g/cm^3;同一压制速度下,有模壁润滑时的最大冲击力要高于无模壁润滑时的最大冲击力,脱模力要小5-20 kN;高速压制的生坯弹性后效远低于传统压制。
Fe-2Cu-1C powders were compacted on HYP35-7 high velocity compaction machine. The effect of eompacion velocity on green density, maximal impact force, withdraw force and radial springback was studied, and the top and bottom microstructures of specimens were observed. Results showed that green density is increased with compacion velocity. Green density of specimens compacted with die-wall lubrication reached 7.53 g/cm^3 at a compaction velocity of 4.39 m/s. The green density and maximal impact force of compaction with die-wall lubrication are greater and withdraw force was 5420 kN lower than that without die-wall lubrication. In addition, radial springback of specimens fabricated by high velocity compaction was lower than that of specimens produced by traditional compaction. The top part was more dense than the bottom part of the same specimen in both cases.
出处
《粉末冶金工业》
CAS
北大核心
2009年第6期28-32,共5页
Powder Metallurgy Industry
基金
国家自然科学基金资助项目(50874051)
广东省自然科学基金重点资助项目(06105411)
教育部新世纪优秀人才资助项目(NCET-05-0739)
关键词
高速压制
最大冲击力
脱模力
弹性后效
模壁润滑
high velocity compaction
maximal impact force
withdraw force
radial spring- back
die-wall lubrication
