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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Wear Resistance of Boron-Modified Supermartensitic Stainless Steel Coatings Produced by High-Velocity Oxygen Fuel Process

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Author(s):
Koga, G. Y. [1] ; Zepon, G. [1] ; Santos, L. S. [1] ; Bolfarini, C. [1] ; Kiminami, C. S. [1] ; Botta, W. J. [1]
Total Authors: 6
Affiliation:
[1] Univ Fed Sao Carlos, Dept Mat Sci & Engn, Rod Washington Luis, Km 235, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: JOURNAL OF THERMAL SPRAY TECHNOLOGY; v. 28, n. 8, p. 2003-2014, DEC 2019.
Web of Science Citations: 0
Abstract

The wear resistance of boron-modified supermartensitic stainless steel coatings produced by high-velocity oxygen fuel (HVOF) was investigated through pinon-disk measurements. It was shown that addition of boron leads to the formation of an interconnected and rigid boride network delimiting the grain boundaries of the martensitic matrix. A very refined structure was formed as result of the high cooling rates imposed to the molten alloy during the HVOF process. The specific wear rates of the HVOF coatings were about tenfold lower than the boron-free supermartensitic stainless steel, lying in the order of 10(-5) mm(3)/N m. The refined boride skeleton along the HVOF coating was found to be effective to reduce the materials' removal from the exposed softer martensitic matrix. While the supermartensitic stainless steel master alloy and the mild steel substrate displayed severe adhesive wear, the HVOF coatings exhibited mild delamination wear at low sliding velocities (10 and 20 cm/s) and abrasive wear at the highest tested velocity (40 cm/s). The studied boron-modified supermartensitic HVOF coatings are an interesting approach to protect the surface of inexpensive steel substrates against wear. (AU)

FAPESP's process: 13/05987-8 - Processing and characterization of amorphous, metastable and nano-structured metallic alloys
Grantee:Claudio Shyinti Kiminami
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 17/09237-4 - Design and production of spray-formed boron-modified stainless steels with high corrosion and wear resistance
Grantee:Guilherme Yuuki Koga
Support Opportunities: Scholarships in Brazil - Post-Doctoral