龙樟,唐东林,陈林燕,温飞娟,刘鑫,马明月

• 1:西南石油大学机电工程学院
• 2:西南石油大学新能源与材料学院
• 3:南充市特种设备监督检验所

摘要(Abstract)：

为降低选区激光熔化(Selective laser melting, SLM)成形GH4169合金的缺陷，提高其性能，对其进行了短时固溶+双时效、短时固溶+单时效及长时固溶+单时效3种不同工艺的热处理。采用光学显微镜、扫描电镜、X射线衍射和电子万能试验机等研究了SLMGH4169合金热处理前后的组织和性能。结果表明：原始态试样组织具有各向异性，XY面(垂直于成形方向)呈现“长条状”组织，而XZ面(平行于成形方向)形成“鱼鳞状”组织；固溶时效处理后，试样中的Laves相溶解并析出了δ相，基体内析出γ′和γ″强化相；经不同工艺热处理后，试样的硬度值均有较大提高；相比原始态试样，不同固溶时效处理态试样的屈服强度和抗拉强度显著增大，但塑性有所下降；所有试样的拉伸断口形貌均为韧窝状结构，但韧窝的大小有所差异，热处理试样形成相对较大的韧窝；3种不同固溶时效工艺处理后试样的电化学腐蚀速率均有所上升，耐腐蚀性能出现下降，但依然具有较好的耐腐蚀性能。

关键词(KeyWords)： 选区激光熔化;GH4169合金;固溶处理;时效处理

Abstract:

Keywords:

基金项目(Foundation): 2023年市校科技战略合作专项(23XNSYSX0112,23XNSYSX0061,23XNSYSX0094);; 2022年南充市科技计划项目(22YYJCYJ0085)

作者(Author): 龙樟,唐东林,陈林燕,温飞娟,刘鑫,马明月

DOI: 10.13289/j.issn.1009-6264.2024-0604

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