Method for the formation of a high-strength and wear-resistant composite layer
AssigneeDaimlerChrysler AG
InventorsJuergen Claus, Reiner Heigl, Markus Kern
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Abstract
The invention relates to a method for the formation of a high-strength and wear-resistant composite layer on the surface of an aluminium-alloy substrate made from an applied metal filler. Said metal filier comprises an alloy or a powder mixture containing aluminium, silicon, and at least 15 wt. % iron. The alloy or powder mixture arranged on the surface of the aluminium-alloy substrate is fused with a surface component of the aluminium-alloy substrate, by means of irradiating the alloy or powder mixture with a laser.
Claims11
A process for forming a high-strength, wear-resistant composite layer (2) on the surface of an aluminum alloy substrate (1), which comprises the following steps:
- a) positioning or supplying an additive material (5, 6) consisting of an alloy or powder mixture which contains aluminum, silicon and at least 20% by weight of iron, as well as copper in an amount of up to 15% by weight and/or zinc in an amount of up to 5% by weight, on the surface of the aluminum alloy substrate,
- b) irradiating the additive material (5, 6) which has been positioned or supplied on the surface of the aluminum alloy substrate (1) with a laser (4) in order to melt the alloy or powder mixture and a surface part of the aluminum alloy substrate,
- c) solidifying the melt (3) with high cooling rates in order to form a fine, homogenous microstructure.
Dependencies are inferred from the claim text.