Hot forming tools for aluminum and magnesium sheets

Details Hot forming tools for aluminum and magnesium sheets Hot forming tools for aluminum and magnesium sheets

2008-03-05

2009-11-24

Jones, David B (Department: 3725)

Metal tools and implements, making

Blank or process

Die

C072S039000, C072S053000, C072S057000, C072S060000, C148S218000, C148S219000

Reexamination Certificate

active

07621201

ABSTRACT:
A ferrous metal tool is provided for the forming of light metal sheet workpieces at elevated temperatures, with the forming surface of the tool prepared to minimize friction and adhesion when engaged in deformation of the hot sheet metal. The forming surface of a steel tool is nitrocarburized to form a compound layer and diffusion layer on the surface. The compound layer initially comprises an outer gamma-phase material and an underlying epsilon phase material. Gamma-phase material is removed to expose underlying epsilon phase material, and low friction particles are embedded in the modified nitrocarburized compound layer of the forming tool.

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patent: 5810947 (1998-09-01), Wu et al.
patent: 5887475 (1999-03-01), Muldner
patent: 6327884 (2001-12-01), Wills
patent: WO 2006019983 (2006-02-01), None

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