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 rate of attack of a salt bath on the surface of parts being heated in a high-temperature bath with a graphite crucible changes as the bath ages and depends on the chemical composition of the steel, the depth to which the part is immersed and the heating time, the thickness of the graphite film formed on the surface of the bath, and also on the time when fresh salts are added to the bath. Depending on these factors, the bath with a graphite crucible may be decarburizing, neutral, or carburizing with respect to different steels. 2. We propose a single criterion for determining the character and rate of attack of the salt bath on steels after operation of the salt bath for different periods — the carbon activity factor Ka, experessing the change in the carbon content of thin samples of high-carbon steel, a negative value of which corresponds to a decarburizing potential, a zero value to neutral, and a positive value to a carburizing potential. 3. Salt baths with a graphite crucible are recommended for individual and small-scale production of cutting tools.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00663180
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