Microstructure, oxidation resistance and mechanical properties of stellite 12 composite coating doped with submicron TiC/B4C by laser cladding

Cheng, Q. and Shi, H. and Zhang, P. and Yu, Z. and Wu, D. and He, S. and Tian, Y. (2020) Microstructure, oxidation resistance and mechanical properties of stellite 12 composite coating doped with submicron TiC/B4C by laser cladding. Surface and Coatings Technology, 395: 125810. ISSN 0257-8972

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Abstract

Stellite 12 and Ti/B4C composite coatings were successfully fabricated on the surface of 304 stainless steel substrates by laser cladding. The effect of Ti/B4C with different mass fractions on the structure and properties of Stellite 12 coating were studied. The properties and the growth mode of the coating were analyzed. The results show that the Stellite 12 coating was mainly composed of face-centered cubic γ-Co and Cr7C3. With the addition of Ti/B4C, TiC submicron particle phase was synthesized in situ in the coatings. Residual B4C as a heterogeneous nucleus particle, forming a submicron microstructure TiC/B4C strengthening phase, and the particle size gradually decreases. The TiC/B4C particles can refine the grains of the coatings. The micro-hardness of the coating gradually increased with the increase of Ti/B4C, and the highest were 650 HV. The wear resistance and oxidation resistance of the coatings gradually increased with the increase of Ti/B4C. © 2020

Item Type:

Journal Article

Journal or Publication Title:

Surface and Coatings Technology

Additional Information:

This is the author’s version of a work that was accepted for publication in Surface and Coatings Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Surface and Coatings Technology, 395, 2020 DOI: 10.1016/j.surfcoat.2020.125810

Uncontrolled Keywords:

/dk/atira/pure/subjectarea/asjc/2500/2505

Subjects:

?? b4cwearboron carbidechromium compoundsinorganic coatingsmicrohardnessoxidation resistanceparticle sizestellitetitanium carbidewear resistance304 stainless steeldifferent massface-centered cubicgrowth modesheterogeneous nucleusstrengthening phasestructure ??

Departments:

Faculty of Science and Technology > Engineering

ID Code:

144509

Deposited By:

ep_importer_pure

Deposited On:

04 Jun 2020 15:40

Refereed?:

Yes

Published?:

Published