Abstract
1. Homogenization at 1200°C provides practically complete solution of carbides and borides. At 1160°C MC carbides and M5B3 borides are preserved and at 1100°C additional formation of M6C carbide is observed. 2. During subsequent aging at 1000°C M6C and M3B2 phases are precipitated and at 800–900°C M2 3C6 phase. MC carbide is stable only in the first steps of heat treatment. 3. The reaction M5B3→M3B2, the intensity of occurrence of which is determined by the conditions of heat treatment, established in KhN65VMTYu alloy.
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