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700 HIGH-TEMPERATURE NICKEL-BASED ALLOY FOR 700 GRADE ULTRA-SUPERCRITICAL COAL-FIRED POWER STATION AND PREPARATION THEREOF
700 HIGH-TEMPERATURE NICKEL-BASED ALLOY FOR 700 GRADE ULTRA-SUPERCRITICAL COAL-FIRED POWER STATION AND PREPARATION THEREOF
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机译：700级超超临界燃煤电站的700高温镍基合金及其制备方法
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摘要
The present invention relates to a nickel-based high-temperature alloy for a super-critical coal-fired power plant at an elevated temperature of 700 ° C, comprising 0.01 to 0.07 wt% of C, 23 to 25.5 wt% of Cr, 10 to 14.6 wt% of Co, 0.3 to 3.5 wt% of Mo, % Of Ti, 1.0 to 2.5 wt% of Al, 1.0 to 2.5 wt% of B, 0.001 to 0.005 wt% of B, 0.01 to 0.3 wt% of Zr, 0.002 to 0.015 wt% of Mg, V 0.01 (Al (Ti + Nb)) of the number of atoms of Al and the sum of the numbers of atoms of Ti and Nb is in the range of 0.001 to 0.5 wt%, La is 0.001 to 0.005 wt%, and the balance is Ni and an inevitable impurity element (Cr / (Mo + W)) of the number of atoms of Cr and the sum of the numbers of atoms of Mo and W is greater than 12, and the ratio of the atomic percentages of Al, Ti and Nb is 5.5 to 6.2 at% , The sum of the atomic percentages of Cr, Mo and W does not exceed 30 at%.
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