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. With accelerated heating up to the melting temperature during heat treatment for cast iron IChKh12M a composite structure is retained: a skeleton of primary ledeburite carbides included in a matrix of variable structure. 2. Use of accelerated austenitizing causes formation of a nonuniform solid solution of austenite in the cast iron matrix. Variation of the heating temperature and cooling rate makes it possible to change within wide limits the structure of the matrix and cast iron properties. An increase in heating temperature followed by slow cooling changes the cast iron matrix structure from pearlite-bainite to bainite-martensite. After quenching there is formation of a martensite-austenite structure. 3. Accelerated heating shifts the temperature of phase transitions for cast iron into a higher temperature region compared with furnace heating. On the basis of this an optimum heat treatment schedule was developed for cast iron IChKh12M which makes it possible to obtain high abrasive wear resistance. Heat treatment with heating for hardening in molten salts or electric heating is recommended for articles of cast iron IChKh12M which operate under abrasive wear conditions.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00776445
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