Abstract
The possibility of reducing the degree of carbide segregation in die steels by heat treatment was studied and optimization of the chemical analysis of the steels was evaluated in order to determine conditions for optimizing their service life as die steels. Investigations on determination of the rules of solution of type M/sub 7//C/sub 3/ carbide phase in Kh12Fl and Kh12M steels made it possible to establish the temperature time conditions for this process. To obtain a uniform carbide phase distribution and, as a result, an increase in the life of large tools the possibility of changing the composition of the steels was determined. To reduce carbide segregation the carbon content in the investigated steels was reduced and Y, Zr, and Nb were additionally added to their composition. The results of production tests and comparative increases in the service life of the steels are discussed.
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