Constrained quenching apparatus and heat treatment apparatus

Details Constrained quenching apparatus and heat treatment apparatus Constrained quenching apparatus and heat treatment apparatus

1994-08-26

1996-02-20

Kastler, Scott

Metallurgical apparatus

Having means for contacting a solid metalliferous material...

With means to prevent warping of treated object

148646, 266259, C21D 1673

Patent

active

054923085

ABSTRACT:
A constrained quenching apparatus is provided for hardening a workpiece such as an asymmetrical bar which has a notable tendency to warping when quenched, without warping the workpiece. The apparatus comprises a set of two or more dies having plural projections provided on the inner side thereof, the projections coinciding with the contour of the workpiece when the dies are closed so that their die faces in contact with one another, and having plural recesses therein defined by the projections. The recesses are provided with one or more cooling liquid blow holes. The apparatus does not exert pressure on the workpiece at the start of the quenching when the workpiece is soft, so the flattening of the hollow workpiece such as a pipe, can be prevented.

REFERENCES:
patent: 3506501 (1970-04-01), Hays et al.

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