| 简介 |
FIELD : metallurgy.
SUBSTANCE : invention refers to cast heat resistant alloys on base of inter-metallide Ni3Al designed for manufacture of, for example, nozzle and working blades, units of nozzle blades, segments of combustion chamber, shutters, and other parts of gas-turbine engines of aircraft industry by method of directed crystallisation and mono-crystal casting. Alloy on base of inter-metallide Ni3Al has the following chemical composition, wt % : Al 8.2-8.7, Cr 2.5-6.0, Mo 2.8-4.2, W 2.8-4.5, Ti 0.01-1.2, Ta 0.5-5.5, Re 0.01-1.4, Co 0.01-5.5, C 0.015-0.08, La 0.015-0.4, Hf 0.01-0.6, Zr 0.01-0.08, Y 0.015-0.15, Ni - the rest.
EFFECT : production of alloy with increased heat resistance, short-term strength and yield point at room temperature for complex of pressure tight equipment (CPE).
2 tbl, 1 ex |
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