中国有色金属学报（英文版）
中國有色金屬學報（英文版）
중국유색금속학보（영문판）
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2011年
10期
2270-2275
,共6页
杨舒宇%蒋敏%李洪晓%王磊
楊舒宇%蔣敏%李洪曉%王磊
양서우%장민%리홍효%왕뢰
Co-Cr-W三元系%Co基高温合金%相图%热力学%σ相%μ相%R相
Co-Cr-W三元繫%Co基高溫閤金%相圖%熱力學%σ相%μ相%R相
Co-Cr-W삼원계%Co기고온합금%상도%열역학%σ상%μ상%R상
Co-Cr-W system%Co-based superalloys%phase diagram%thermodynamics%r phase%μ phase%R phase
用CALPHAD方法评估了Co-Cr-W三元系,计算了1 000, 1 200和1 350℃的相平衡.采用亚正规溶体模型描述了液相,fcc相,bcc相和hcp相.σ相,μ相,R相分别用模型(Co,W)8(Cr,W)4(Co,Cr,w)18,(Co,CrW)7W2(Co,Cr,W)4和(Co,W)27(Cr,W)14(Co,Cr,W)12来表示；得到了自洽的热力学相互作用参数.计算的1 000,1 200和1 350℃的相图与实验数据吻合.
用CALPHAD方法評估瞭Co-Cr-W三元繫,計算瞭1 000, 1 200和1 350℃的相平衡.採用亞正規溶體模型描述瞭液相,fcc相,bcc相和hcp相.σ相,μ相,R相分彆用模型(Co,W)8(Cr,W)4(Co,Cr,w)18,(Co,CrW)7W2(Co,Cr,W)4和(Co,W)27(Cr,W)14(Co,Cr,W)12來錶示；得到瞭自洽的熱力學相互作用參數.計算的1 000,1 200和1 350℃的相圖與實驗數據吻閤.
용CALPHAD방법평고료Co-Cr-W삼원계,계산료1 000, 1 200화1 350℃적상평형.채용아정규용체모형묘술료액상,fcc상,bcc상화hcp상.σ상,μ상,R상분별용모형(Co,W)8(Cr,W)4(Co,Cr,w)18,(Co,CrW)7W2(Co,Cr,W)4화(Co,W)27(Cr,W)14(Co,Cr,W)12래표시；득도료자흡적열역학상호작용삼수.계산적1 000,1 200화1 350℃적상도여실험수거문합.
The Co-Cr-W ternary system was critically assessed using the CALPHAD technique.The solution phases including the liquid,y-Co,ε-Co and α-Cr were described by a substitutional solution model.The σ,μ and R phases were described by three-sublattice models of (Co,W)8(Cr,W)4(Co,Cr,W)18,(Co,Cr,W)7W2(Co,Cr,W)4 and (Co,W)27(Cr,W)14(Co,Cr,W)12,respectively,in order to reproduce their homogeneity ranges.A self-consistent set of thermodynamic parameters for each phase was derived.Thecalculated isothermal sections at 1 000,1 200 and 1 350 C are in good agreement with the experimental data.A eutectoid reaction of R (=) μ+γ-Co+σin this ternary system was predicted to occur at 1 022 ℃.
