Effects of (Cr,Fe)(2)B borides on hardness in powder-injection-molded product fabricated with Fe-based alloy powders
SCIE
SCOPUS
- Title
- Effects of (Cr,Fe)(2)B borides on hardness in powder-injection-molded product fabricated with Fe-based alloy powders
- Authors
- Jeonghyeon Do; Changwoo Jeon; Choongnyun Paul Kim; Lee, BJ; Lee, S; Eon-Sik Lee; Tae Shik Yoon; Yang Su Shin
- Date Issued
- 2012-10-30
- Publisher
- ELSEVIER
- Abstract
- In the present study, a powder injection molding (PIM) product containing (Cr,Fe)(2)B borides was fabricated with Fe-based alloy powders, and its microstructure and hardness were investigated in relation with volume fraction of (Cr,Fe)(2)B. In the Fe-based alloys designed by the thermodynamic calculation, the volume fractions of (Cr,Fe)(2)B increased with increasing (X-cr+ X-B) value, and were well matched with those obtained from the thermodynamic calculation. The hardness of the Fe-based alloys linearly increased with increasing volume fraction of (Cr,Fe)(2)B. When Fe-based alloy powders were injection-molded and sintered at 1165 degrees C, a densified microstructure with almost no pores was obtained. In the sintered microstructure, 56 vol% of (Cr,Fe)(2)B borides, together with a few pores (porosity; 0.5%), were relatively homogeneously distributed in the tempered martensite matrix, which resulted in the very high hardness over 600 VHN. Such a high hardness suggested that the present Fe-based alloy powders could be readily adopted for fabricating PIM products or for replacing conventional stainless steel PIM products. (c) 2012 Elsevier B.V. All rights reserved.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/15887
- DOI
- 10.1016/J.MSEA.2012.06.100
- ISSN
- 0921-5093
- Article Type
- Article
- Citation
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, vol. 556, page. 366 - 372, 2012-10-30
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