| 摘要 |
The component (7, 8, 9) is cast from a metallic material having a thixotropic structure and a semi-solid state. In a subsequent cold treatment stage, at least a part of the component is cold treated by impact with projectiles for plastic deformation. Preferably, after the casting stage and before the subsequent cold treatment stage, the formed component is subjected to structural hardening comprising quenching and tempering. Before structural hardening, the formed component is subjected to die-stamping. The metallic material is an alloy based on one of the following metals: aluminum, magnesium, titanium, iron, chromium, cobalt, nickel, copper, zinc, silver, tin, lead and antimony, preferably an aluminum alloy containing 6.5-7.5 weight % silicon and 0.5-0.6 weight % magnesium. Corundum particles of size 75-150 microns , glass microspheres, and steel shot of size 200-800 microns and are used in at least one operation of the cold treatment stage. Independent claims are given for: (a) fabrication of a metal component (9) for a vehicle wheel (9), the wheel (9) comprising a wheel disk (7) and a rim (8), so that the wheel comprises the fabricated metal component, and where the cold treatment stage involves subjecting the whole or at least a part of the face (7a) of the disc (7) and/or the rim (8) to impact with projectiles; (b) fabrication of a metal component (7 or 8) for a vehicle wheel (9), the component (7 or 8) comprising a wheel disk or a rim, so that the component comprises the fabricated metal component (7 or 8), and where the cold treatment stage involves subjecting the whole or at least a part of the face (7a) of the disc (7) and/or the rim (8) to impact with projectiles; and (c) a vehicle wheel (9) comprising a rim (8) on which is fixed a metallic disc (7) which is fabricated according to the above process. |
