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

1991-12-23

1994-04-12

Kastler, Scott

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148648, 266 92, C21D 104

Patent

active

053022157

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, Ninth Edition, vol. 4, "Forming and Forging", .COPYRGT.1981 pp. 172-175.

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