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Indexed by:期刊论文

Date of Publication:2011-09-01

Journal:JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY

Included Journals:Scopus、SCIE、EI、ISTIC

Volume:27

Issue:9

Page Number:809-815

ISSN No.:1005-0302

Key Words:Cold spray; Gas temperature; 304 stainless steel coating; Microstructure; Property

Abstract:In the present study, 304 stainless steel coatings were deposited on interstitial-free steel substrates by cold gas dynamic spray technology. The effect of gas temperature on microstructure, micro-hardness, cohesive strength, and electrochemical property of the coatings were investigated and compared. The results showed that increasing gas temperature had a great contribution to enhancing the bonding strength between the deposited particles and making the microstructure more density. Therefore, the porosity of the coatings decreased from 6%+/- 0.5% to 2%+/- 0.3%, and the tensile strength of the coatings increased from 56 +/- 4 MPa up to 73 +/- 3 MPa. In addition, the corrosion resistance of the coatings was also deeply influenced by process gas temperature. The corrosion kinetics of the coatings were affected by both of the plastic deformation of deposited particles and the porosity in the coatings.