Part 3. Ageing and Solution Treatment, Material Inspection, Five Alloy Specifications
This concluding article gives details of the final stages of the production of light-alloy gravity diecastings at a Rolls-Royce Shadow factory, and ends with a review of the characteristics of five important alloys. For the information contained in this series of articles we are indebted to Mr. J. Vickers, manager of this foundry.
This article first appeared in the Volume 5, Number 61 (November, 1943) issue of Aircraft Production magazine, and is presented here through the kind permission of Flight International. Thanks also to Bruce Vander Mark for furnishing volumes of Aircraft Production for scanning.
Ageing and solution treatment, where required, are the only operations remaining to be carried out on the castings. After being stamped by the inspectors, the parts are placed in metal bins or “heat-treatment baskets” constructed from 16 S.W.G. sheet iron perforated with 0.63” diameter holes that allow free circulation of hot air around the castings, thus automatically ensuring uniform heating while in the furnace.
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