郝宪朝,熊超,梁田,陈波,高明,刘奎,夏亮

• 1:中国科学院金属研究所
• 2:中国中原对外工程有限公司

摘要(Abstract)：

采用不同热处理工艺对热轧态690合金棒材进行处理,研究了合金的晶粒长大倾向,分析了晶粒尺寸对碳化物析出及晶界区域化学成分演变的影响。结果表明:690合金晶粒尺寸均随着固溶温度升高而增大。TT处理对合金晶粒尺寸的影响不明显。晶粒尺寸较大的690合金晶界碳化物较为连续,碳化物粗大、间距小、呈细条状,晶内含有少量的颗粒状碳化物;细小晶粒的合金晶界碳化物尺寸细小、间距大、呈颗粒状,晶粒内碳化物数量增加。随碳化物沿晶界析出,晶界区域Cr、Ni和Fe含量发生变化。与大晶粒尺寸的合金相比,小晶粒的690合金晶界最低Cr浓度增加,贫Cr区宽度明显减小。

关键词(KeyWords)： 690合金;固溶处理;TT处理;晶粒

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 郝宪朝,熊超,梁田,陈波,高明,刘奎,夏亮

DOI: 10.13289/j.issn.1009-6264.2017.01.019

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