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).
Query on using copper-plating to prevent hardening on specific areas during the nitrifying process.
| Identifier | ExFiles\Box 154a\1\ scan0116 | |
| Date | 22th November 1928 | |
| BY. {R.W. Bailey - Chief Engineer} from R. {Sir Henry Royce} Hs. {Lord Ernest Hives - Chair} X4469 RL/M22.11.28. NITRIFYING HARDENING. X.4469 X.7060 X.7090 In the above process can parts be treated so that they do not harden, say by copper-plating? The valve gear cam followers must not be hardened on the thread. R. {Sir Henry Royce} | ||