Formation of hard coatings on cutting edges

Details Formation of hard coatings on cutting edges Formation of hard coatings on cutting edges

1989-01-31

1990-06-12

Nguyen, Nam X.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

20419215, 20419216, 20419222, 427 38, 427249, 4272552, 4272553, C23C 1434, C23C 1600, B05D 306

Patent

active

049330586

ABSTRACT:
A method of making a cutting edge, which comprises coating a substrate cutting edge having a defined cross-sectional geometry, with a material which is harder than the material of the substrate cutting edge by a vapor deposition or sputtering process, if necessary in the presence of gaseous or vaporized molecules of another element or a compound of another element where it is desired to form the coating of a compound, at a pressure of less than 10.sup.-2 m bar, while simultaneously subjecting the cutting edge to ion bombardment with ions of sufficient mass and energy to cause sputter removal of the deposited material at a rate which is less than the rate of deposition, whereby a cutting edge formed of the deposited material and having a defined cross-sectional geometry and ultimate tip radius, is obtained.

REFERENCES:
patent: 3652443 (1972-03-01), Fish
patent: 3740327 (1973-06-01), Lane
patent: 3761374 (1973-09-01), Bromer
patent: 3802078 (1974-04-01), Denes
patent: 3829969 (1974-08-01), Fischbein
patent: 3911579 (1975-10-01), Lane
patent: 4094764 (1978-06-01), Boucher et al.
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patent: 4416912 (1983-11-01), Bache
patent: 4419202 (1983-12-01), Gibson
patent: 4526802 (1985-07-01), Sato
patent: 4720918 (1988-01-01), Curry et al.
International Search Report PCT-US87/00162, Apr. 1, 1987 (2 pages).

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