Process for heat treating metals or metal alloys in a thermal pl

Details Process for heat treating metals or metal alloys in a thermal pl Process for heat treating metals or metal alloys in a thermal pl

1987-12-30

1989-10-10

Brody, Christopher W.

Metal treatment

Compositions

Heat treating

21912159, 148128, 148 16, 148 203, 148151, C21D 152

Patent

active

048729264

ABSTRACT:
Workpieces of metal are treated with a high temperature, ambient pressure argon arc plasma system to facilitate surface and through hardening.
The argon flame is directed against the outer surface of the rotating workpiece. The surface temperature is monitored by a non contact I.R. temperature sensor and controlled by varying the inert gas flowrate through the plasma generator and/or varying the electrical power input to the plasma generator.

REFERENCES:
patent: 2491134 (1949-12-01), Robb
patent: 3615924 (1971-10-01), Swoboda
patent: 3660630 (1972-05-01), Sunnen
patent: 4181845 (1980-01-01), Bolton
patent: 4312685 (1982-01-01), Riedl
patent: 4420346 (1983-12-01), Belkin et al.
Metals Handbook, vol. 4, Heat Treating, pp. 502-503, .COPYRGT.1981.

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