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. 8    No. 4    December 2001

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Abnormal gradient microstructure in Cr3C2based cemented carbide
ZHANGLi1,CHENShu2

1. PowderMetallurgy Factory, Central SouthUniversity, Changsha 410083, China;
2. Changsha Research Institute ofMining and Metallurgy, Changsha 410012, China

Abstract:With OLYMPUS PMG3 metallo graph, an abnormal three-layer gradient structure ,i.e. coarse grain zone, binder enrichment zone and normal structure zone from the surface to the inner, was observed in Cr3C2 based cemented carbide. In the binder enrichment zone, three different shapes of anomalous coarse carbides were observed. It is shown that the transverse rupture strength can be raised remarkably, up 20.7% from the alloy with abnormal gradient structure by removing the abnormal gradient structure. It is suggested that the abnormal gradient structure in the surface, especially the anomalous coarse carbides in the binder enrichment zone is the main reasons for the lower strength.

 

Key words: Cr3C2 based cermet; cemented carbide; gradient structure; microstructure

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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