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. 8    No. 4    December 2001

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Possibility of utilizing water-atomized Fe-Ni-Mo steel
powder as base materials for warm compaction process
CAO Shun-hua,QUXuan-hui,ZHANGLi-hua, YI Jian-hong,HUANG Bai-yun

State Key Laboratory for PowderMetallurgy, Central SouthUniversity,Changsha 410083, China

Abstract:Water-atomized Fe-Ni-Mo steel powder, was utilized as base powder for designing powder mixtures for warm pressing. The warm pressing and sintering behaviours of the powder mixtures were studied. The results show that, compared with the pressing at room temperature , the green density gain by warm pressing is within a range of 0.10-0.19 g/cm3and reduction in spring back is 30%-40% of the ambient, and maximum green density of 7.32 g/cm3at 735 MPa is obtained as the graphite mass fraction is 0.8%. It was found that sintered densities of the compacts were reduced slightly due to releasing of elastic stress stored in the compacts during sintering. The warm pressing of steel powders gives evidence for substituting the traditional double pressing and double sintering process.

 

Key words: water-atomized steel powder; warm compaction; sintering

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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