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针对时效处理铸造镍基高温合金K52的碳化物,研究了其在强磁场作用下的组织形貌与化学成分变化规律。结果表明:在不同磁场条件下时效处理后,合金中碳化物MC和M23C6的组织形貌与分布基本相同,强磁场的施加对碳化物的组织形貌与分布并未产生显著影响,但经强磁场条件下时效处理后,MC和M23C6中强碳化物形成元素W、Mo、Nb和Ti含量有所增加,而弱碳化物形成元素Cr和非碳化物形成元素Co、和Ni含量显著降低。分析指出强磁场的施加可能提高了强碳化物形成元素与C间的亲和力,增强了其形成碳化物的倾向;同时其可能减弱了弱碳化物形成元素和非碳化物形成元素与C间的亲和力,从而使其在碳化物中存在的倾向也进一步降低。
Aging treatment of nickel-based superalloy K52 casting carbide, its magnetic field under the action of the changes in the morphology and chemical composition. The results show that the morphology and distribution of carbides MC and M23C6 in the alloy are basically the same after aging treatment under different magnetic fields. The application of the strong magnetic field has no significant effect on the morphology and distribution of carbides. However, After aging treatment under magnetic field conditions, the contents of W, Mo, Nb and Ti, the formation of strong carbide in MC and M23C6 increased, while the contents of Cr, non-carbide forming elements Co and Ni decreased significantly. The analysis indicates that the application of strong magnetic field may increase the affinity between the strong carbide forming elements and C and enhance their tendency to form carbides; at the same time, it may weaken the affinity between the weak carbide forming elements and the non-carbide forming elements and C , So that the tendency to exist in the carbide is further reduced.