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).
Single quenching process for gears made from 5% case-hardened nickel steel.
| Identifier | ExFiles\Box 49\2\ Scan129 | |
| Date | 22th September 1922 | |
| To BY.{R.W. Bailey - Chief Engineer} from R.{Sir Henry Royce} To Wor.{Arthur Wormald - General Works Manager} " Hs.{Lord Ernest Hives - Chair} " EP.{G. Eric Platford - Chief Quality Engineer} " HL. c. to CJ. X 3612 R1/M22.9.22. RE. BEVEL AND OTHER GEARS, ETC X.3612. X.492. Gears made in 5% case-hardened nickel steel should not require quenching more than once, this being the object in using this high content of nickel, and the resulting skin and core should be sufficiently fine and consistent to give a satisfactory gear, if the temperature is well chosen, as we understand is confirmed by the experience of the E.N.V. people, and RR. America. I have never desired more than one quenching with 5% C.H. nickel steel. Mr. Hall should say to what temperature the steel should be heated, and whether the core, and also the skin resulting from the single quenching is in a satisfactory condition. The great trouble and expense we have been to in using this material and in providing cold oil for quenching had for its chief object satisfactory case hardening without distortion. R.{Sir Henry Royce} | ||