Chemistry: electrical and wave energy – Processes and products – Coating – forming or etching by sputtering
Patent
1987-12-21
1989-04-11
Niebling, John F.
Chemistry: electrical and wave energy
Processes and products
Coating, forming or etching by sputtering
20419216, C23C 1446
Patent
active
048203920
ABSTRACT:
The wear life of a high-speed tool steel cutting bit is increased by (a) cleansing the bit by subjection to an ion beam; (b) while preventing the temperature of said cleansed from rising above 350.degree. C., coating the cleansed bit by condensing sputtered atoms of titanium and boron thereonto, the condensation being carried out to provide a coating thickness of 2-6 microns. An argon or krypton beam of ions is accelerated to 1300-1800 volts as a broad-beam ion source to sputter a titanium diboride target arranged as a cathode. The sputtering is carried out for 5-10 minutes while the bit is heated to about 200.degree. C. and a soft vacuum of about 4-6 milli-torr is used during the process.
REFERENCES:
patent: 3029102 (1962-04-01), Mueller
patent: 3160480 (1964-12-01), Alliegro
patent: 4209375 (1980-06-01), Gates et al.
patent: 4237184 (1980-12-01), Gonseth et al.
patent: 4411960 (1983-10-01), Mizuhara
patent: 4560577 (1985-12-01), Mirtich et al.
Hoffman David W.
Moskowitz David
Schmatz Duane J.
Ford Motor Company
Leader William T.
Malleck Joseph W.
May Roger L.
Niebling John F.
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