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. Dashavskii gas is an effective carburizer and can be used in its natural state as an inexpensive carburizer. 2. The input of the natural gas into the muffle furnace is a direct function of the prescribed carbon content of the case, the temperature of the process, the size of the muffle, and the weight of the charge. With a controlled input of the carburizer no soot is formed in the furnace. 3. Adding 20–30% ammonia to natural gas accelerates carburizing, increases the depth of the case, and improves the wear resistance and mechanical properties of steels 20KhN3A and 17Kh3MA after all the heat treatments used. 4. Carburizing in natural gas with added ammonia and a controlled input of the carburizer shortens the process 50–60% by comparison with the present technique and makes it possible to control the case depth. This technique is already being used for 20KhN3A drill bits at the Drogobychskii Drill Plant.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00652975
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