冀宣名,赵丹,邓平

• 1:贵州大学材料与冶金学院

摘要(Abstract)：

针对Inconel718镍基合金与316L不锈钢异材焊接易出现气孔、裂纹、脆化等现象，采用不同的激光功率对它们进行激光焊接试验，研究了激光功率对接头组织和性能的影响。结果表明：采用激光功率在2.4～3.0 kW范围且氩气氛围辅助的激光焊接可得到宏观成型、微观组织致密性良好，无可视宏观缺陷的Inconel718/316L接头，熔池面积随激光功率增大而增大；Laves相在焊缝区析出，消耗基体内的强化元素，引起焊缝显微硬度的降低，接头显微硬度呈阶梯状分布，Inconel718母材最高，焊缝次之，316L母材最低；激光功率为2.4 kW时，接头具有最高的抗拉强度，为689 MPa,随激光功率的继续增大，强度降低；接头的耐蚀性受焊缝晶粒尺寸与Laves相的影响，表现为2.4 kW>2.2 kW>(2.6～3.0) kW。

关键词(KeyWords)： IN718/316L接头;激光焊接;激光功率;Laves相;接头性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51974097,52161010);; 贵州省科技支撑计划(2022-050);; 贵州大学培育项目(2020-21)

作者(Author): 冀宣名,赵丹,邓平

DOI: 10.13289/j.issn.1009-6264.2023-0168

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