Molten-salt bath for nitriding mechanical parts made of steel, and implementation method

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United States of America Patent

PATENT NO 9611534
APP PUB NO 20130327445A1
SERIAL NO

13985437

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A molten-salt bath for nitriding mechanical steel parts, essentially consisting of the following (the contents being expressed in wt %): 25 to 60 wt % of alkali-metal chlorides; 10 to 40 wt % of alkali-metal carbonates; 20 to 50 wt % of alkali-metal cyanates; and a maximum of 3 wt % of cyanide ions (formed during the use of the bath), wherein the total of the contents is 100 wt %. Preferably, the bath contains: 25 to 30 wt % of sodium cyanate; 25 to 30 wt % of sodium carbonate and lithium carbonate; 40 to 50 wt % of potassium chlorides; and a maximum of 3 wt % of cyanide ions (formed during the use of the bath), the total of the contents being 100 wt %.

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H E F42160 ANDREZIEUX-BOUTHEON

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chavanne, Herve Noalhat, FR 3 3
Maurin-Perrier, Philippe Saint-Marcellin-en-Forez, FR 21 59

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