From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Revised heat-treatment process for aluminium tin bearing alloys.
| Identifier | ExFiles\Box 115\3\ scan0094 | |
| Date | 6th October 1937 | |
| COPY. RHC.{R. H. Coverley - Production Engineer} c. RHC{R. H. Coverley - Production Engineer}/Mr.Pendlebury. c. RHC{R. H. Coverley - Production Engineer}/Mr.Goodall. c. BY/CS. c. H1. BY/HM.{Capt. W. Hallam - Head Repairs}36/J.6.10.37. HEAT-TREATMENT OF ALUMINIUM TIN BEARING ALLOYS. In accordance with instructions issued by BY, will you kindly note that all H1's aluminium tin bearing alloys must in future be given a heat treatment after rough machining of 20 hours at 160°C. The original period of twelve hours is not considered sufficiently long to ensure the bearings becoming properly stabilised and apparently some slight movement is still taking place in service. Will BY/CS, therefore kindly arrange to put the revised heat treatment which must be carried out after rough machining, on all drawings for aluminium tin bearing alloys irrespective of whether it is the AC.2, AC.6 or AC.7 material which is specified and will all concerned kindly note that in future 20 hours ageing must be given. BY/HM.{Capt. W. Hallam - Head Repairs} | ||