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METHOD OF HEAT TREATMENT OF NI-BASE SUPERALLOY CONTAINING NIOBIUM FOR EXCELLENT INTERFACIAL PROPERTIES OF GRAIN BOUNDARIES AND NI-BASE SUPERALLOY HEAT-TREATED THEREBY
METHOD OF HEAT TREATMENT OF NI-BASE SUPERALLOY CONTAINING NIOBIUM FOR EXCELLENT INTERFACIAL PROPERTIES OF GRAIN BOUNDARIES AND NI-BASE SUPERALLOY HEAT-TREATED THEREBY
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机译：晶界的优良界面性能的含铌镍基高温合金的热处理方法及由此对镍基高温合金进行热处理的方法
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摘要
The present invention relates to a heat treatment method to form a serrated grain boundary of a Ni-based superalloy containing niobium such as an alloy 625 (Ni-21Cr-9Mo-3.5Nb) used for a main component such as a steam or gas turbine for power generation, a blade forming an aircraft engine turbine, a vein, a heat exchanger, and a combustor, and an alloy heat-treated thereby. More specifically, the present invention relates to a method of serration heat treatment of a Ni-based superalloy containing niobium of grain boundaries to increase resistance of damage caused by creep, fatigue, oxidation, corrosion, or the like at high temperature by an inter-crystalline crack, and a Ni-based superalloy containing niobium, which is heat-treated thereby to have a serrated grain boundary.
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