黄添,舒林森,陈向东,卢进军

• 1:陕西理工大学机械工程学院
• 2:陕西省工业自动化重点实验室
• 3:航空工业陕西飞机工业有限公司
• 4:陕西理工大学物理与电信工程学院

摘要(Abstract)：

为了解决镍基高温合金涂层“强度有余，韧性不足”的问题，采用激光重熔工艺处理激光熔覆Inconel718合金涂层，研究重熔功率对涂层表面形貌、物相组成、显微组织和拉伸性能的影响。结果表明：重熔后的熔覆层表面粉末附着减少，表面形貌得到明显改善；激光重熔后熔覆层的组织仍是由γ-(Ni, Fe, Cr)和γ″-Ni_3Fe双相组成，随着激光重熔功率的增大，组织中γ″-Ni_3Fe相的体积分数先增加后减少，且涂层顶部和中部组织的晶粒尺寸先减小后增大；经重熔后涂层的拉伸强度和屈服强度略有降低，但伸长率获得显著提升，重熔功率为1200、1350和1500 W时分别提高了47.4%、52.6%和48.7%;重熔功率为1350 W时试样断口中韧窝分布均匀，此功率重熔处理的涂层韧性最好。激光重熔工艺可以有效地提高熔覆层的力学性能。

关键词(KeyWords)： 激光熔覆;激光重熔;高温合金;显微组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 陕西省重点研发计划(S2022-YF-YBGY-0437);; 陕西省秦创原“科学家+工程师”团队建设项目(2023KXJ-123)

作者(Author): 黄添,舒林森,陈向东,卢进军

DOI: 10.13289/j.issn.1009-6264.2024-0037

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