普恒,杨韬如,向敏,胡耀波

• 1:重庆大学材料科学与工程学院
• 2:国家镁合金材料工程技术研究中心

摘要(Abstract)：

可降解的压裂工具是目前石油钻井领域用工具的研究热点。在Mg合金中加入Fe能够与Mg基体形成电偶腐蚀，使合金具备高速率的可降解性能。添加较少稀土元素制备镁合金，可使合金具有较高的塑性，以增强其抗冲击的能力，从而适用于更复杂的石油钻井工况。基于此，制备了Mg-Gd-Fe合金和Mg-Gd-Cu合金，并对比研究了两种挤压态合金的微观组织、力学性能和腐蚀性能。结果表明：Mg-Gd-Cu合金的屈服强度和抗拉强度均高于Mg-Gd-Fe合金，Mg-Gd-Cu合金强度较高可归因于第二相的体积分数较高、晶粒尺寸较细；Mg-Gd-Fe和Mg-Gd-Cu合金的断后伸长率分别为53.0%和23.3%,这是由于Cu元素削弱了稀土织构，且第二相的体积分数较高，从而降低了Mg-Gd-Cu合金的塑性；在25℃的3.0 mass%KCl溶液中，Mg-Gd-Fe和Mg-Gd-Cu合金均具有优异的降解性能，降解速率分别为380.9 mm/y和219.5 mm/y。

关键词(KeyWords)： 可溶合金;高塑性;力学性能;腐蚀性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金面上项目(52071037)

作者(Author): 普恒,杨韬如,向敏,胡耀波

DOI: 10.13289/j.issn.1009-6264.2024-0294

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