Abstract
1. High-temperature annealing of Fe−C−W alloys with 1.69–1.81% C and 19.7–11.2% W leads to the division, spheroidization, and coalescence of the eutectic cubic carbide (W, Fe)6C and the nucleation and growth of angular hexagonal WC, at the expense of reducing the amount of cubic carbide. 2. Some of the individual carbide particles in the structure of high-speed steels after treatment at high temperatures result from the transformation of carbide in the course of which the metastable binary carbide (W, Fe)6C is transformed into stable WC.
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