Method for selectively heating a workpiece subjected to low temp

Details Method for selectively heating a workpiece subjected to low temp Method for selectively heating a workpiece subjected to low temp

1987-01-23

1988-05-17

Brody, Christopher W.

Metal treatment

Compositions

Heat treating

148 12F, 148 124, 148150, C21D 800

Patent

active

047448369

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: 4373973 (1983-02-01), Cellitti
patent: 4637844 (1987-01-01), Pfaffman

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