Citation

Miyata A, Nishimoto A, Akamatsu K. Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals 2011; 75(9): 469-473.

Copyright

(Copyright © 2011)

DOI

10.2320/jinstmet.75.469

PMID

unavailable

Abstract

Cr-Si intermetallic compound coatings were coated on an austenitic stainless steel SUS310S substrate by pulsed electric current sintering process to improve its wear and oxidation resistances. The coating was carried out for 0.6-10.8 ks at 1073-1323 K at a coating pressure of 60 MPa. As a result of pin-on-disk wear test, the wear property of the coatings was more excellent than that of the substrate. The tensile strength of the coatings was 10-20 MPa. These coatings fractured at the interface between the coatings and the substrate during tensile test. As a result of hot hardness test, the coatings showed higher hardness than the substrate, even at high temperature. Hardness of the coatings fell gradually up to the transition temperature of 870 K and decreased rapidly on further heating. As a result of oxidation-testing for 700 ks at 1123 K, the mass increase of the coatings after oxidizing was less than that of the substrate. These results indicate that wear resistance and strength at elevated temperature could be given to the substrate without deteriorating oxidation resistance. © 2011 The Japan Institute of Metals.

Language: ja

Keywords

Electric currents; Intermetallics; Oxidation; Oxidation resistance; Substrates; Coatings; Sintering; Chromium; Hardness; Surface modification; Austenite; Wear resistance; High temperature; Elevated temperature; Corrosion resistant alloys; Austenitic stainless steel; Chromate coatings; Electric current measurement; Hardness testing; Hot hardness; Intermetallic compound; Mass increase; Pin-on-disk wear test; Pulsed electric current sintering; Reaction layer; Reaction layers; Soldering alloys; Surface reactions; Surface resistance; Surface testing; Tensile strength; Tensile testing; Tensile tests; Wear and oxidation resistance; Wear properties