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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11130190 B1

PDFFull Text
Date of Patent:
Sep. 28, 2021

Filed:

Aug. 29, 2017

Electro-spark deposition of molybdenum on stainless steel and products thereof

Applicant:

Huys Industries Limited, Weston, CA;

Inventors:

Zhen Jiao, Toronto, CA;

Yunhong Zhou, Waterloo, CA;

Assignee:

HUYS INDUSTRIES LIMITED, Weston, CA;

Attorneys:

Moore & Van Allen PLLC

Jeffrey R. Gray

Primary Examiner:

Michael E La Villa

Int. Cl.
CPC ...
B32B 15/01 (2006.01); C23C 26/02 (2006.01); C22C 38/22 (2006.01); B23K 9/04 (2006.01); B23K 9/16 (2006.01); B23K 35/32 (2006.01); B23K 35/02 (2006.01); B23K 35/30 (2006.01); C23C 28/02 (2006.01); C23C 30/00 (2006.01); B32B 15/18 (2006.01); B32B 15/04 (2006.01); C23C 26/00 (2006.01); B23K 103/04 (2006.01);
U.S. Cl.
CPC ...
B23K 9/042 (2013.01); B23K 9/04 (2013.01); B23K 9/16 (2013.01); B23K 35/0261 (2013.01); B23K 35/3093 (2013.01); B23K 35/32 (2013.01); B32B 15/01 (2013.01); B32B 15/013 (2013.01); B32B 15/04 (2013.01); B32B 15/043 (2013.01); B32B 15/18 (2013.01); C22C 38/22 (2013.01); C23C 26/00 (2013.01); C23C 26/02 (2013.01); C23C 28/02 (2013.01); C23C 28/021 (2013.01); C23C 28/023 (2013.01); C23C 30/00 (2013.01); C23C 30/005 (2013.01); B23K 2103/05 (2018.08); C21D 2211/001 (2013.01); C21D 2211/005 (2013.01); Y10T 428/12826 (2015.01); Y10T 428/12847 (2015.01); Y10T 428/12854 (2015.01); Y10T 428/12951 (2015.01); Y10T 428/12958 (2015.01); Y10T 428/12972 (2015.01); Y10T 428/12979 (2015.01); Y10T 428/12993 (2015.01); Y10T 428/2495 (2015.01); Y10T 428/24967 (2015.01); Y10T 428/263 (2015.01); Y10T 428/264 (2015.01); Y10T 428/265 (2015.01);
Abstract

Molybdenum is alloyed into stainless steel surface by electro-spark deposition technique. Shielding gas is used during electro-spark deposition process to minimize the oxidation of materials. Control of electro-spark voltage, frequency, capacitance, time can determine the alloying depth of Molybdenum. The alloyed surface thickness varies from 5 μm to 80 μm depending on the electro-spark deposition parameters. The alloyed surface comprises, by weight, 15 to 40% of Molybdenum, 8 to 22% of Cr, 0-15% of other alloy elements and impurities. The molybdenum alloyed stainless steel surface exhibits improvement in micro-hardness, wear resistance, and especially corrosion resistance in sodium chloride solutions. Thus, the present invention would be utilized in marine and handling of brines application, as well as in other applications which better corrosion resistance of stainless steel is desired.

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