赵雪会,白真权,冯耀荣,魏斌,尹成先,王敬忠

• 1:中国石油集团石油管工程技术研究院
• 2:西安建筑科技大学

摘要(Abstract)：

利用金相法、扫描电镜、透射电镜(TEM)等技术研究了镍基耐蚀合金材料固溶时效处理过程中,晶间和晶内大量产生的析出相对材料性能的影响。通过实际摸索试验,对不同温度固溶时效处理以及微观组织变化、析出相出现的条件分析,研究了组织的变化以及析出相对材料性能的影响。结果表明析出相的类型与数量明显受处理温度的影响,析出相大量在晶界产生,几乎呈网状结构;拉伸形貌表明有析出相的断口属于沿晶脆性断裂。结合镍基耐蚀合金在油气田的应用环境,研究了镍基耐蚀合金在酸性环境下的腐蚀性能。碳化物析出相使得晶界形成贫铬区,引起晶内与晶界电位的差异而发生点蚀,点蚀主要集中在晶界处,析出相的存在造成材料耐蚀性下降。建议控制合适的工艺参数,控制碳含量在尽可能低的水平,避免大量析出物的生成影响材料的耐蚀性能。

关键词(KeyWords)： 镍基耐蚀合金;固溶处理;析出相;沿晶断裂;晶界

Abstract:

Keywords:

基金项目(Foundation): 中石油科技开发项目(2008D-2404)

作者(Author): 赵雪会,白真权,冯耀荣,魏斌,尹成先,王敬忠

DOI: 10.13289/j.issn.1009-6264.2012.08.009

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