METHOD FOR PRODUCING AN ANODIZED; TURNED 6XXX ALLOY MECHANICAL PART WITH LOW ROUGHNESS AFTER ANODIZATION

摘要

Method for producing a mechanical component, in which a. A. casting a billet of aluminum alloy of the following composition (in% by weight): Si 0.4-3.0; Mg 0.6-2.0; Cu 0.20-1.0; Fe 0.15-1.8; Mn≤0.5; Ni ≤ 1; Ti 0.15; Cr ≤ 0.35; Bi ≤ 0.8; Pb ≤ 0.4; Zr 0.04, other elements in each case 0.05 and in total 0.15, balance aluminum, b. the ingot is homogenized, c. the billet is extruded to obtain an extruded product, i. quenching is carried out from the press heat, e. the extruded product is optionally rectified and / or typically cold formed by stretching and / or drawing, and / or aged, f. an outsourcing treatment is performed, g. the extruded product is optionally cold formed, typically by drawing, h. the resulting extruded product is machined to obtain a rotated mechanical component, i. the resulting mechanical component is optionally molded, j. anodizing the resulting mechanical component is carried out, wherein the anodizing is carried out at a temperature between 15 and 40 ° C with a solution containing 100 to 250 g / l sulfuric acid and 10 to 30 g / l oxalic acid and 5 to 30 g / l comprising at least one polyol.