Fe-25Cr-35Ni系合金中的第二相

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

郭景锋

徐仁根

晁代义

邵文柱

崔约贤

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。

标签 Fe-25Cr-35Ni系合金

富铌相

氮化物相

碳化物相

Fe-25Cr-35Ni based super alloy

Nb-rich phase

nitride phase

carbide phase

Abstract

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.

中图分类号 TG132.3

所属栏目试验与研究

基金项目

收稿日期 2012/1/7

修改稿日期

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备注郭景锋(1983-),男,硕士。

引用该论文: GUO Jing-feng,XU Ren-gen,CHAO Dai-yi,SHAO Wen-zhu,CUI Yue-xian. Second Phases in Fe-25Cr-35Ni Based Super Alloy[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2012, 48(8): 500～504
郭景锋,徐仁根,晁代义,邵文柱,崔约贤. Fe-25Cr-35Ni系合金中的第二相[J]. 理化检验－物理分册, 2012, 48(8): 500～504

被引情况:

【1】杨超,冯立中,吴红涛,杨贤彪, "超超临界汽轮机IN783螺栓断裂原因分析",理化检验－物理分册 51, 346-349(2015)

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