Method and apparatus for selectively heating a workpiece subject

Details Method and apparatus for selectively heating a workpiece subject Method and apparatus for selectively heating a workpiece subject

1988-03-09

1991-04-23

Kastler, III, S.

Metallurgical apparatus

With control means responsive to sensed condition

With means responsive to condition of treated material

266 78, 266115, C21D 968, C21D 1100

Patent

active

050093959

ABSTRACT:
Process and apparatus are provided for selective heating a portion of a workpiece to achieve improved ausforming and isoforming processes when the workpiece is plastically deformed by mechanical working above the M.sub.s temperature. The process and apparatus includes a preheating step where a larger portion of the workpiece is preheated to less than the austenitic critical temperature while the final heating step conducted at a temperature higher than the austenitic critical temperature heats a smaller portion of the workpiece which is subsequently subjected to plastic deformation.

REFERENCES:
patent: 2598694 (1952-06-01), Herbenar
patent: 3592702 (1971-07-01), Dehn
patent: 4373973 (1983-02-01), Cellitti et al.
Metals Handbook vol. 14 Forming and Forging 9th ed .COPYRGT.1981 pp. 173-175.
Metals Handbook vol. 4 9th ed .COPYRGT.1981 pp. 472-473.

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