Ultra-supercritical thermal power generating unit steel excellent in steam corrosion oxidization resistance and high-temperature endurance property and preparing method thereof
An ultra-supercritical, thermal power unit technology, applied in the field of heat-resistant steel, can solve problems such as damage to steam turbine blades, reduced power generation efficiency, etc., and achieve high-temperature stability assurance, good industrialized manufacturability, and good room temperature mechanical properties.
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[0045] Use a vacuum induction furnace to smelt 50-500Kg steel ingots with the chemical composition shown in Table 1. After these steel ingots are billeted, they are heated to 1263 ° C, kept for 4 hours, and the deformation temperature is 1213 ° C. rolling plate. Next, the hot-rolled sheet was normalized and kept at 1146° C. for 1 hour, air-cooled to room temperature, then kept at 751° C. for 3 hours, and air-cooled to room temperature. The normal temperature mechanics, long-term failure and durable strength were taken from the above heat-treated steel plate, and the measured properties are shown in Table 3.
[0046] The water vapor oxidation test procedure is as follows: Preparation of H 2 O-air mixed gas: compressed air is used as the carrier gas to form 18% H through a water bath at a certain temperature 2 O--air mixture. The gas path between the water bath and the high temperature furnace is insulated (the temperature is higher than the temperature of the water bath) to ...
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