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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.52  No.3 (2011)  >  pp.474-480

MATERIALS TRANSACTIONS
<<Previous article Vol.52  No.3 (2011)   pp.474 - 480 Next article>>

High Chromium Fe-Cr-Mo-P-C Amorphous Coating Films Produced by Thermal Spraying Technique

Masahiro Komaki1), Tsunehiro Mimura1), Ryurou Kurahasi1), Masahisa Kouzaki2) and Tohru Yamasaki3)
1) Nakayama Steel Works, Ltd., R&D Division
2) Nakayama Steel Works, Ltd.
3) University of Hyogo


High chromium Fe-Cr-Mo-P-C amorphous coating films containing up to about 35 at% Cr having high hardness and high corrosion resistance have been produced by a newly developed thermal spraying technique. In order to control the temperatures of the powder particles in the flame spray and the substrate, a cylindrical nozzle, with external cooling nitrogen gas, was mounted to the front end of the thermal spraying gun. Fe70Cr10P13C7 and Fe38Cr35Mo7P13C7 films with various external cooling gas velocities between 20 m/s and 40 m/s exhibited entire amorphous structure without oxides and/or unmelted powder particles. High corrosion-resistance of the Fe38Cr35Mo7P13C7 amorphous coating film was observed in immersion tests using 35% hydrochloric acid.


Keyword:
high chromium alloys, iron-chromium-molybdenum-phosphorus-carbon, amorphous coating film, thermal spraying method, rapid cooling, hardness, corrosion resistance

Received: October 22, 2010
Accepted: December 20, 2010 , Published online: February 25, 2011
Copyright (c) 2011 The Japan Institute of Metals

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