CRN coated die-casting tools for casting low aluminum iron alloy

Details CRN coated die-casting tools for casting low aluminum iron alloy CRN coated die-casting tools for casting low aluminum iron alloy

1993-12-21

1995-12-19

Bradley, P. Austin

Metal founding

Process

Shaping liquid metal against a forming surface

164312, 164113, B22C 300

Patent

active

054761344

ABSTRACT:
Steel tooling for die-casting low iron content aluminum alloys is surface treated with a layer of CrN applied to a thickness of at least 4 microns, and preferably 5-10 microns, by physical vapor deposition (PVD), and preferably a steered are evaporation PVD process. The CrN protects the steel tooling from dissolution and erosion by the highly active molten aluminum.

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Hard Coatings By PVD Methods; by A. Matthews, et al.; Published under the auspices of The Short Course Executive Committee American Vacuum Society; pp. 1-76.
Technical Note: A Review Of Cathodic Arc Plasma Deposition Process And Their Applications; by H. Randhawa et al.; Surface and Coatings Technology, 37 (1987) pp. 303-318.

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