Abstract

The effect of cooling rate and carbon content on the formation of nonequilibrium phases has been investigated in rapidly solidified 10Cr-5Mo and 10Cr-10Mo iron alloys containing very high carbon contents of 2 to 5% in mass. The cooling rate was varied by changing the nozzle size in a single roller method to result in an approximate value of 6.10 4 to 4.10 5 K/s. Nonequilibrium solid solutions of crystalline γ, e and ψ phases as well as an amorphous phase were formed depending on the cooling rate and chemical composition of alloys. The optimum condition for obtaining the e phase in the 10Cr-5Mo alloy and the ψ phase in the 10Cr-10Mo alloy was determined by the combination of cooling rate and carbon content

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