PROBLEM TO BE SOLVED: To provide a material which is excellent in high-temperature strength and room-temperature toughness, in which precision casting and directional solidification can be applied, and which is easily hot worked.;SOLUTION: The niobium-based high-temperature alloy includes 9.0 to 17.5 atom% Si and 1 atom% or more and a solid-solution limit or less of one or more elements selected from the group consisting of Au, Pd, Re, Os, Ir, and Pt, with the balance consisting of inevitable impurities and niobium, and has a Nb/Nb5Si3 eutectic structure in which spheroidized Nb5Si3 particles are dispersed in a Nb base material phase. In the niobium-based high-temperature alloy, the amount of displacement by a 1,200°C high-temperature three-point bending test is 1,500 μm or more. The niobium-based high-temperature alloy can be produced by a method including: a melting step of melting a raw material metal component; a solidification step of solidifying the molten material obtained by the melting step; and a heat treatment step of heat-treating the solidified material with a lamellar structure comprising Nb and Nb5Si3 obtained by the solidification step at 1,100 to 1,700°C in a solid state to spheroidize the Nb5Si3.;COPYRIGHT: (C)2013,JPO&INPIT
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机译:要解决的问题:提供一种具有优异的高温强度和室温韧性的材料,可以进行精密铸造和定向凝固,并且易于热加工。高温合金包括9.0至17.5原子%的Si和1原子%以上的元素,以及固溶极限值以下的一种或多种选自Au,Pd,Re,Os,Ir和Pt的元素,其余为由不可避免的杂质和铌组成,具有Nb / Nb 5 Sub> Si 3 Sub>共晶结构,其中球化Nb 5 Sub> Si 3 <颗粒分散在Nb基体材料相中。在铌基高温合金中,通过1200℃的高温三点弯曲试验的位移量为1500μm以上。铌基高温合金可通过以下方法制造:熔融原料金属成分的熔融步骤;和固化步骤,用于使通过所述熔融步骤得到的熔融材料固化。热处理步骤,是在1100〜1700℃下,在1100〜1700℃下对由上述固化步骤得到的具有Nb和Nb 5 Sub> Si 3 Sub>的层状结构的固化物进行热处理的工序。固态球化Nb 5 Sub> Si 3 Sub> .;版权所有:(C)2013,日本特许厅&INPIT
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