Nickel alloy products with their surfaces nitrided and hardened

Details Nickel alloy products with their surfaces nitrided and hardened Nickel alloy products with their surfaces nitrided and hardened

1992-07-02

1995-08-29

Yee, Deborah

Metal treatment

Stock

Carburized or nitrided

C21D 106

Patent

active

054456835

ABSTRACT:
The present invention relates to nickel alloy products with their surfaces nitrided and hardened which are formed by pressure casting nickel alloy material, and nitrided and hardened layers are formed in surface layers. Since the nitrided and hardened surfaces of the nickel alloy products according to the invention have much better corrosion resistance than iron products have, anticorrosion treatment such as plating is not required, and rich lubricity and excellent tightening property can be obtained without having seizure and scuffing phenomena.

REFERENCES:
patent: 4588450 (1986-05-01), Purohit
patent: 5114500 (1992-05-01), Tahara et al.
Journal of Less Common Metals V. 9 No. 5 Nov. 1965; Khan, I. A. and T. R. Bhat "Fluoride Catalysis of The Nitridation and Oxidation of Some Metals". pp. 388-389.
Metal Alloys Index 91(11):561392 1991.

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