陈雨来,房菲,李静媛,王一德

• 1:北京科技大学材料科学与工程学院
• 2:中国核电工程有限公司

摘要(Abstract)：

研究碳(C)含量为0.05%~0.77%时对18Mn18CrN高氮奥氏体不锈钢750~850℃时效析出行为的影响。结果表明,C含量未改变实验钢中析出方式和析出相类别,Cr2N析出相首先沿晶界以颗粒形貌析出,而后以片层状向晶内生长。随着时效时间的增加,片层状析出相体积分数及片层间隙增加,元素的扩散是控制其长大的主要因素。增加C含量可降低Cr2N相析出孕育时间,增加Cr2N相体积分数,降低Cr2N相扩散激活能,其中QD(A1)=157.63kJ·mol-1;QD(A3)=32.92kJ·mol-1。随C、N含量增加,实验钢中Cr2N相体积分数呈线性趋势增加,但其增加程度更敏感于N含量的变化。

关键词(KeyWords)： 高氮奥氏体不锈钢;C含量;N含量;析出相;扩散激活能

Abstract:

Keywords:

基金项目(Foundation): 国家“十二五”科技支撑计划项目(2012BAE04B02);; 国家自然科学基金(51174026)

作者(Author): 陈雨来,房菲,李静媛,王一德

DOI: 10.13289/j.issn.1009-6264.2015.09.017

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