谷云龙,夏培培,杨柳青,吴林恩,张莎莎,高志伟,龚宝明

• 1:中国石油天然气管道科学研究院有限公司
• 2:北华航天工业学院材料工程学院
• 3:天津职业技术师范大学
• 4:天津市高性能精准成形制造技术与装备重点实验室

摘要(Abstract)：

采用光学显微镜、扫描电镜和电化学测试等研究了热等静压处理对选区激光熔化(SLM)制备的GH3536合金试样的微观组织及耐腐蚀性能的影响。结果表明：SLM制备的GH3536合金沉积态试样存在明显的熔池形貌，微观组织存在明显的各向异性，试样的XOZ面和XOY面分别由柱状晶和等轴晶构成；热等静压处理后，熔池形貌和亚晶结构消失，微观组织趋于均匀，各向异性消失，并在晶界处析出了富铬的M_(23)C_6碳化物和富钼的M_6C碳化物；相比于沉积态试样，热等静压试样的自腐蚀电位提高约22%,点蚀电位提高约4%,腐蚀密度降低约43%,表明其具有更优异的耐腐蚀性能；这主要是由于热等静压处理消除了熔池边界和亚晶晶界，降低了点蚀敏感性，另外，晶界密度的下降和晶界类型的转变有助于热等静压态试样耐腐蚀性能的提高。

关键词(KeyWords)： GH3536合金;选区激光熔化;热等静压处理;耐蚀性能

Abstract:

Keywords:

基金项目(Foundation): 天津市市教委科研计划项目(2022KJ130);; 河北省高等学校科学技术研究项目(CXY2024017)

作者(Author): 谷云龙,夏培培,杨柳青,吴林恩,张莎莎,高志伟,龚宝明

DOI: 10.13289/j.issn.1009-6264.2025-0081

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