Method of treating the surfaces of mould parts for casting moulds consisting of a steel material

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United States of America Patent

PATENT NO 11124866
APP PUB NO 20200283883A1
SERIAL NO

16765214

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Abstract

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With the method according to the invention, mould parts for casting moulds for light metal casting can be treated such that the danger of crack formation in the region of the surface sections of the mould part coming into contact with the light metal melt during casting is reduced to a minimum. This is achieved in that by means of nitriding treatment on the mould part a nitride-hardened edge layer adjoining its free surface is generated which is harder than the inner core region of the mould part and comprises a diffusion layer adjoining the core region and a compound layer located on the diffusion layer and adjoining the free surface of the mould part and in that at least one section of the surface of the mould part is mechanically processed by machine hammer peening, in the case of which a hammer tool, which, at a certain impact frequency, carries out an impact movement along a movement axis which is aligned in relation to the free surface at a certain acute angle, is guided continuously over the free surface of the mould part following a track determined in a preceding design step such that the compound layer is removed by the impacting stress in the impact region of the hammer tool.

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Patent Owner(s)

  • NEMAK, S.A.B. DE C.V.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bleicher, Friedrich Vienna, AT 7 19
Groza, Ugis Vienna, AT 1 0
Lechner, Christoph Vienna, AT 1 0
Scheil, Jan Darmstradt, DE 2 0
Viechtbauer, Christoph Bad Soden am Taunus, DE 1 0

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