ISSN:
1573-8973
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Conclusions 1. The hardness of steel R14F4 after threefold tempering depends substantially on the temperature and the duration of the heating to the hardening temperature: a) an increase of the holding time to 12, 15, and 18 sec/mm, at all hardening temperatures, enhances the hardness obtained after triple tempering at 560 and 580°; b) the average hardness value after threefold tempering at 560° is higher than after identical treatment at 580°. 2. The highest red hardness values (Rh 60) are attainable on application of the following heat-treatment conditions: quenching from 1260°, holding for 15 and 18 sec/mm, triple tempering at 560°. 3. The steel R14F4 thread milling cutters heat-treated under optimum conditions display a performance 40% superior to that of cutters made from steel R18.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00819296
Permalink