FIELD: chemical and heat treatment, mainly of refractory nickel alloys, possibly restoration and manufacture of blade of stationary power production plants and aircraft gas-turbine engines.
SUBSTANCE: method for protecting surface of blade at process of hot isostatic extrusion comprises steps of placing blade in container and further placing it in gasostat; before hot isostatic extrusion immersing blade or its part into ceramic powder on base of refractory oxides with melting temperature 1400-2800°C and fraction size in range 0.01 - 17 micrometers.
EFFECT: prevention of blade oxidation at hot isostatic extrusion.
3 cl, 8 dwg, 3 tbl, 3 ex
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