FIELD: electrothermic method of treatment of metals. SUBSTANCE: process is designed for surface saturation of working surface of spider from austentic manganese steel with carbon. Process consists in surface carburization of spider with carbon arc of reversed polarity with formation of pig iron structure and its subsequent chill due high cooling rate. Surface treatment is conducted by local melting of sections of spider surface in the form of spots or strips. Surface treatment is performed through layer or under layer of flux to obtain even and smooth surface of strengthened sections. EFFECT: prolonged service life of spider, simplified process. 2 cl
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