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).
Process and control of nitralloy hardening, including the use of test pieces to diagnose issues.
| Identifier | ExFiles\Box 154a\1\ scan0191 | |
| Date | 21th January 1930 | |
| X4469 BY1/G.21.1.30. H1. Mr. Pendlebury RHC.{R. H. Coverley - Production Engineer} c. Hs.{Lord Ernest Hives - Chair} c. Rg.{Mr Rowledge} c. Dft. c. Hor. NITRALLOY. It is of the utmost importance until we obtain thorough knowledge of the process of nitralloy hardening that either H1. himself or one of his Technical Assistants should be present and technically control the whole question of the treatment of the parts during the hardening process. H1. has a copy of all the information which is available in connection with this material, and in addition he is of course well acquainted with all the technical issues involved. We should, of course, with all the material we handle for nitralloy hardening have a series of test pieces exactly the same as we do when treating case hardening nickel steel in order to check the material, both from the point of view of the depth of the hardening and to be able to track out any variations from the normal. If we had had a number of test pieces in with the crank which is now under discussion from the point of view of being covered with small pit marks, we should have been able to check whether it was peculiar to the crankshaft or was exhibited in the test pieces as well. This matter is of the utmost importance from the point of view of thoroughly understanding the material and developing same as rapidly as possible. Unless some carefully organised scheme of this type is carefully adhered to we are unlikely to make material progress in the handling of this material. BY.{R.W. Bailey - Chief Engineer} | ||