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).
Heat treatment and hardness testing process for a gear component.
| Identifier | ExFiles\Box 94\2\ scan0277 | |
| Date | 9th August 1937 | |
| -4- RHC{R. H. Coverley - Production Engineer}/A.{Mr Adams} McW.1/MJ.9.8.37.Cont'd.{John DeLooze - Company Secretary} The carburizing was conducted at 1650°F.{Mr Friese} allowing a duration of 4 hours at heat to obtain a depth of penetration of approximately .030", and allowing the piece to cool in the pot. The piece was re-heated to 1550°F.{Mr Friese} and quenched in oil, heated again to 1425°F.{Mr Friese} and again quenched in oil. The piece was tempered at 325°F.{Mr Friese} and allowed to cool in the oven. Hardness figures obtained upon the pieces under this treatment were a Rockwell of C.60 to C.62 upon the case. The core Brinell showed figures of 280 to 300 upon the unhardened cores of the gear. It is suggested that the box be tested upon the dynamometer to obtain the necessary data of material, wear, etc., under load-period conditions. Now u 37 E-F RHC{R. H. Coverley - Production Engineer}/A.{Mr Adams} McWilliams. | ||