C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 8/48 (2006.01)
Patent
CA 2565769
Provided is a method for nitriding a metal in a salt bath by using a non-cyanide salt and a nitrided metal manufactured using the same. The method includes the steps of: immerging at least one salt selected from the group consisting of KNO3, KNO2, Ca(NO3)2, NaNO3 and NaNO2 into the salt bath; melting the salt by heating and maintaining the molten salt at a predetermined temperature; and submerging the metal in the salt bath. Nitriding in non-cyanide salts, such as potassium nitrate(KNO3), potassium nitrite(KNO2), sodium nitrate (NaNO3), sodium nitrite(NaNO2), calcium nitrate(Ca(NO3)2) and their mixtures, is capable of solving an environmental pollution problem and reducing a cost. Also, the method is capable of increasing nitrided depth of the metal two to six times compared to conventional nitriding methods. As a result, the method can be carried out in various application fields.
Jung Hee Won
Kim Dong Sam
Lee Dong Nyung
Oh Kyu Hwan
Park Young June
Iljin Light Metal Co. Ltd.
Ridout & Maybee Llp
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