Abstract
In this work the effect of heat treatment of the product from the heat-resistant alloy ZhS6U, obtained by the wire-feed electron beam additive technology on its structure and mechanical properties was investigated. Additively obtained material and the initial casted material were subjected to the following heat treatment: solution treatment at 1200°C for 4 hours followed by cooling in the air and aging at 950°C for 2 hours followed by cooling in the furnace chamber. Such structural-phase changes as dissolution of γ/γ′ eutectics, enlargement of γ′-phase, transformation of MeC carbides into Me6C as well as formation of Cr23C6 carbide and η-phase were established. The negative effect of the selected heat treatment regime on the mechanical properties of the additive material caused by the formation of the brittle η-phase is shown.
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