(EN) The purpose of the present invention is to provide: a Co-based alloy product having mechanical properties that are equivalent or superior to those of precipitation-hardened Ni-based alloy materials; and a method for producing the Co-based alloy product. The Co-based alloy product according to the present invention has a chemical composition which contains 0.08 to 0.25% by mass of C, 0.1% by mass or less of B and 10 to 30% by mass of Cr, also contains 5% by mass or less of Fe and 30% by mass or less of Ni wherein the total amount of Fe and Ni is 30% by mass or less, also contains W and/or Mo wherein the total amount of W and Mo is 5 to 12% by mass inclusive, also contains at least one element selected from Ti, Zr, Hf, V, Nb and Ta in a total amount of 0.5 to 2% by mass inclusive, and also contains 0.5% by mass or less of Si, 0.5% by mass or less of Mn and 0.003 to 0.04% by mass of N, with the remainder made up by Co and impurities, wherein the impurities contain 0.5% by mass or less ofAl and 0.04% by mass or less of O. The product is characterized in that the product is a polycrystal body of matrix phase crystals, post-segregation cells which have an average size of 0.13 to 2 [mu]minclusive are formed in crystal grains of the polycrystal body, and MC-type carbide phase grains each containing the Ti, the Zr, the Hf, the V, the Nb and/or the Ta are dispersed and deposited on theboundaries of the post-segregation cells.
(ZH) 本发明的目的在于提供一种具有与析出强化Ni基合金材同等以上的机械特性的Co基合金制造物及其制造方法。本发明所涉及的Co基合金制造物的特征在于，具有如下化学组成：含有0.08～0.25质量％的C、0.1质量％以下的B和10～30质量％的Cr，含有5质量％以下的Fe和30质量％以下的Ni且Fe和Ni的合计为30质量％以下，含有W和/或Mo且W和Mo的合计为5质量％以上12质量％以下，以合计0.5质量％以上2质量％以下含有Ti、Zr、Hf、V、Nb和Ta中的1种以上，含有0.5质量％以下的Si、0.5质量％以下的Mn和0.003～0.04质量％的N，余量由Co和杂质构成，所述杂质含有0.5质量％以下的Al和0.04质量％以下的O；所述制造物是母相结晶的多晶体，在所述多晶体的晶粒内，形成平均尺寸为0.13μm以上2μm以下的后偏析晶胞，含有所述Ti、所述Zr、所述Hf、所述V、所述Nb和/或所述Ta的MC型碳化物相粒子在该后偏析晶胞的边界上分散析出。
