自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 9    No. 3    September 2002

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Study on mechanical properties of warm compacted iron-base materials
LI Yuan-yuan(李元元), Ngai Tungwai Leo(倪东惠), XIAO Zhi-yu (肖志瑜),
ZHANG Da-tong(张大童), CHENWei-ping(陈维平)

AdvancedMetallic Materials Engineering Research and ProcessingTechnology Center,
South China University ofTechnology,Guangzhou510640,China

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.

 

Key words: warm compaction; powder metallurgy; mechanical property

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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