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Microstructure and tribological properties of gray cast iron specimens coated by aluminizing, boronizing, chromizing and siliconizing

Published online by Cambridge University Press:  15 January 2013

T. Murakami ,
K. Matsuzaki ,
Y. Gomi ,
S. Sasaki  and
H. Inui
T. Murakami
Affiliation:
National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Ibaraki 305-8564, Japan
K. Matsuzaki
Affiliation:
National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Ibaraki 305-8564, Japan
Y. Gomi
Affiliation:
Department of Mechanical Engineering, Tokyo University of Science, Tokyo 102-0073, Japan
S. Sasaki
Affiliation:
Department of Mechanical Engineering, Tokyo University of Science, Tokyo 102-0073, Japan
H. Inui
Affiliation:
Department of Materials Science and Engineering, Kyoto University, Kyoto 606-8501, Japan
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Abstract

In this study, aluminized, boronized, chromized and siliconized gray cast iron plate specimens were prepared, and their microstructures and tribological properties were investigated. The surfaces of the aluminized, boronized, chromized and siliconized specimens mainly consisted of FeAl, Fe2B, (Cr, Fe)23C6 and FeSi phases, respectively. Also, the surface of the boronized specimen exhibited the highest microvickers hardness of all the specimens. The aluminized, boronized and chromized specimens exhibited friction coefficients as low as the non-coated specimens when sliding against AISI 52100 steel ball specimens in poly-alpha-olefin. In addition, the boronized and chromized specimens exhibited much higher wear resistance than the non-coated specimens.

Keywords

coatingtribologyhardness
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1516: Symposium JJ – Intermetallic-Based Alloys—Science, Technology and Applications , 2013 , pp. 115 - 120
Copyright
Copyright © Materials Research Society 2012 

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