Method of producing areas of alloy metal on a metal part using e

Details Method of producing areas of alloy metal on a metal part using e Method of producing areas of alloy metal on a metal part using e

1978-07-12

1980-11-18

Reynolds, B. A.

Electric heating

Metal heating

For deposition welding

219 85, 219 95, 219 1043, 219 761, B23K 904, H05B 600, B23K 1100

Patent

active

042347769

ABSTRACT:
A method and apparatus for modifying the surface properties of a metal part in which electric current having a frequency of at least 3000 Hz is supplied to a narrow area on the part by means of contacts, one at each end of the area, and a proximity conductor or is induced therein by an induction coil until the metal in the area reaches a temperature at least equal to its melting temperature. A material which will alloy with the metal of the part is added to the molten metal so that when the molten metal is cooled an area of an alloy of the metal and the added material is produced. The added material may be in the form of a gas, powder, salt, wire, rod, bar, foil, etc. and may be applied to the area before, during, or after the melting of the metal of the area. The spacing between the proximity conductor or the induction coil and the work is no greater than three times the width of the proximity conductor or the coil conductor.

REFERENCES:
patent: 2164310 (1939-07-01), Denneen et al.
patent: 3267252 (1966-08-01), Morris
patent: 3497662 (1970-02-01), Rudd et al.
patent: 3504148 (1970-03-01), Maximovich et al.
patent: 3591757 (1971-07-01), Rudd
patent: 4006337 (1977-02-01), Maxim
patent: 4039700 (1977-08-01), Sohmer et al.
patent: 4117302 (1978-09-01), Earle et al.
Heat Treating, Feb. 1977, pp. 16-21, "Laser Heat Treating", by Lawrence W. Carley.
Automotive Industries, Aug. 1, 1976, pp. 31-33, "The Laser Takes on the Hard Ones", by Carl A. Gottesman.

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