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).
The heat treatment process for Peregrine Chassis cylinder liners.
| Identifier | ExFiles\Box 2\3\ B002_X 116 117 119 120-page41 | |
| Date | 5th January 1933 | |
| HS.{Lord Ernest Hives - Chair} C.RHS. Y 119 BY.1./J.5.1.33. Peregrine Chassis - Cylinder Liners. The cylinder liners for the Peregrine Engine have been instructed for production in our normal Cylinder Cast Iron and should have a Brinell Hardness of 202 to 228. We understand that HL. has made some tests and has ascertained that by suitable treatment the Brinell of these liners can be raised to 400 - 450 (practically the same as the Special Liners originally obtained from Sheepbridge Stokes Castings Co.) The treatment necessary to obtain this result is as follows:- (1) Heat to 880°C, and quench in oil. (2) Temper at 350°C and cool in air. If it is desired to try a set of liners in the heat treated condition, it will be necessary to machine the parts before treatment leaving only grinding allowances for removal after heat treatment. We would suggest that one set of liners be tried experimentally in the heat treated condition. BY.{R.W. Bailey - Chief Engineer} | ||