| 摘要 |
The invention relates to a method for manufacturing an aluminum block having a thickness at least equal to 250 mm and intended for manufacturing elements for vacuum chambers. Said method involves the following consecutive steps: semi-continuous casting of an alloy block having a composition such that, in wt%, Si is between 0.5 and 1.5, Mg is between 0.5 and 1.5, Fe < 0.3, Cu < 0.2, Mn < 0.8, Cr < 0.10, Ti < 0.15, each other element is less than 0.05, and a total of 0.15 remains aluminum; solution heat treatment is carried out, at a temperature between 450° and 560° C, directly on the cast block that is possibly made uniform; the resulting solution heat-treated block is quenched with the speed for cooling, between the solution temperature and 200° C, being at least 200° C/h; and tempering is carried out on the thus-quenched and possibly de-tensioned block. The resulting blocks are particularly advantageous in creating vacuum chambers for the manufacture of semiconductor-based integrated electronic circuits, flat display screens, and photovoltaic panels. |
