Castings made from aluminium and its alloys, whereof at least one face has at least one region of wear-resistant zones
AssigneeCegedur Societe de Transformation de l'Aluminium Pechiney
InventorsGerard Laslaz, Serge Terroni
Life of this patent
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Abstract
Castings made from aluminum and its alloys have at least one face including at least one region of wear-resistant zones. These castings are formed by a controlled distribution of zones hardened by local melting effect. The zones, no matter what their length and shape, have a width and depth between 3 and 150 .mu.m and the surface fraction or percentage of the zones for the wear-resistant region is between 5 and 60%.
Claims12
A casting made of a material taken from the group consisting of aluminium and aluminium alloy, said casting having at least one surface including at least one wear-resistant region comprising a controlled distribution of zones hardened by localized melting and resolidification, wherein said zones have a width and a depth of between 3 and 150 .mu.m and wherein a percentage of the surface area of said wear-resistant region comprising said zones is between 5 and 60%.
A process of making a casting formed of a material taken from the group consisting of aluminium and aluminium alloy, said casting having at least one surface including at least one wear-resistant region, said process comprising the steps of:
- applying focused laser radiation to said wear-resistant region to produce melting zones,
- controlling at least one of said casting and said laser radiation such that said melting zones have a width and a depth of less than 150 .mu.m;
- and
- permitting said melting zones to resolidify to form hardened zones.
Dependencies are inferred from the claim text.