Fe-25Cr-35Ni系合金中的第二相  

Second Phases in Fe-25Cr-35Ni Based Super Alloy

作　　者：郭景锋[1,2] 徐仁根[2] 晁代义[2] 邵文柱[3] 崔约贤[3] 

机构地区：[1]山东中川液压有限公司,临沂276715 [2]烟台大学环境与材料工程学院,烟台264005 [3]哈尔滨工业大学材料科学与工程学院,哈尔滨150001

出　　处：《理化检验（物理分册）》2012年第8期500-503,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：采用光学显微镜和扫描电子显微镜以及能谱仪研究了Fe-25Cr-35Ni系合金中的第二相种类和分布。结果表明:Fe-25Cr-35Ni系合金中的第二相主要有3种,即富铌相、氮化物相和碳化物相;其中,富铌相主要沿晶界分布,并且富铌相之间存在成分差异;氮化物相主要为TiN,一般与富铌相共生,其分布主要与氮化物偏析有关;碳化物相数量较多,分布较广泛,晶内、晶界、孪晶界和孪晶内均有分布,经高温固溶处理后可固溶到奥氏体基体中。The second phases and their distribution in Fe-25Cr-35Ni based super alloy were investigated through optical microscope, scanning electron microscope and energy diffraction spectrum. The results show that there are mainly three kinds of second phases in Fe-25Cr-35Ni based super alloy and they are Nb-rich phase, nitride phase and carbide phase. The Nb-rich phases mainly distribute along the grain ground, and there is chemical compositions difference between the Nb-rich phases. The nitride phases mainly are TiN and generally intergrow with the Nb-rich phases, and their distributing relates to the segregation of nitride. The carbide phases amount is more and they distribute in the grains, grain boundaries, twins and twin boundaries. And the carbide phases could be dissolved into the base metal after high temperature solution treatment.

关 键 词：Fe-25Cr-35Ni系合金 富铌相 氮化物相 碳化物相 

分 类 号：TG132.3[一般工业技术—材料科学与工程]