Study on mechanical properties of warm compacted iron-base materials

来源期刊：中南大学学报(英文版)2002年第3期

论文作者：李元元 倪东惠 肖志瑜 张大童 陈维平

文章页码：154 - 158

Key words：warm compaction; powder metallurgy; mechanical property

Abstract: Mechanical properties of the warm compacted iron-base powder metallurgy materials were compared with those of conventional cold compacted materials. Factors such as compaction temperature, lubricant concentration and lubricant′s property were studied. A lubricant for warm compaction powder metallurgy was developed. An iron-based powder metallurgy material with a green density of 7.31 g/cm3(a relative density of 92.5%) can be obtained by pressing the powder at700MPa and 175℃. The sinteredmaterials have a density of 7.2 g/cm3, an elongation of 2.1% and a tensile strength of 751MPa compared to 546MPa using conventional cold compaction with the same lubricant and 655MPa using warm compaction with other lubricant. Compact density and mechanical properties were influenced strongly by the compacting temperature. Although the best quality compacts can be obtained at 175℃, warm compaction within 165 to 185℃can give high density compacts. Evidence shows that compact density depends on the friction coefficient of the lubricant.

基金信息：the National Natural Science Foundation of China