US Patent 7431778 Case-hardening of stainless steel
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Patent abstract
The invention relates to case-hardening of a stainless steel article by means of gas including carbon and/or nitrogen, whereby carbon and/or nitrogen atoms diffuse through the surface into the article. The method includes activating the surface of the article, applying a top layer on the activated surface to prevent repassivation. The top layer includes metal which is catalytic to the decomposition of the gas.
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US Patent 07431778 Case-hardening of stainless steel US Patent 7431778 Case-hardening of stainless steel
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Patent Number
0743177800
Patent Number
743177800
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Official Website
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Infobox
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Patent Jurisdiction
Patent Number
074317780
Date of Patent
October 7, 2008
0Patent Application Number
105216120
Date Filed
July 15, 2003
0Official Website
Patent Primary Examiner
Edits on 25 Sep, 2022
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Infobox
Is a
Patent Jurisdiction
Patent Number
074317780
Date of Patent
October 7, 2008
0Patent Application Number
105216120
Date Filed
July 15, 2003
0Official Website
Patent Primary Examiner
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US Patent 07431778 Case-hardening of stainless steel
Infobox
Is a
Patent jurisdiction
Patent number
07431778
Date of patent
October 7, 2008
Patent application number
10521612
Date Filed
July 15, 2003
Patent primary examiner
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