激光沉积修复ZL105铝合金显微组织及力学性能

伊俊振; 潘家鸣; 杨婷; 潘珂瑛; 王超

doi:10.3969/j.issn.2095-1248.2025.02.004

沈阳航空航天大学学报 ›› 2025, Vol. 42 ›› Issue (2) : 31 -37. DOI: 10.3969/j.issn.2095-1248.2025.02.004

机械与材料工程

激光沉积修复ZL105铝合金显微组织及力学性能

伊俊振 ^a ,
潘家鸣 ^a ,
杨婷 ^a ,
潘珂瑛 ^a ,
王超 ^b

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Microstructure and mechanical properties of ZL105 aluminum alloy repaired by laser deposition

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摘要

随着航空航天领域的飞速发展，航空铝合金铸件的高质量修复技术具有重大的经济效益和科研价值，为此，开展了ZL105铝合金的激光沉积修复技术研究。探索了最佳的激光沉积修复工艺参数，分析激光修复区的组织形貌及试样的显微硬度和室温拉伸性能。结果表明，修复区与基体形成良好的冶金结合。修复区组织细密，由柱状树枝晶和等轴晶组成。修复区显微硬度较基体提升了16%，修复件强度可达基体强度的96%以上，且随着修复比的增大，修复件的强度逐渐降低，但塑性提高。修复试样断裂机制是“韧+脆”的混合断裂。

Abstract

With the rapid development of the aerospace industry，high quality repair technology of aerospace aluminum alloy castings has significant economic benefits and scientific research mirits.Accordingly，a study on the laser deposition repair technology of ZL105 aluminum alloy was carried out.Optimal laser deposition repair process parameters were explored.The microstructure morphology of the laser repair area，the microhardness and room temperature tensile properties of the specimens were measured.The results show that good metallurgical bonding between the repair area and the substrate are obtained.Restoration areas are finely organized and composed of columnar dendrites and isometric crystals.The microhardness of the repaired area increased 16% compared to the substrate，and the strength of the repair parts can reach more than 96% of the strength of the substrate.What’s more，as the repair ratio increases，the strength of the repair parts decreases gradually but the plasticity improves.The fracture mechanism of the repaired specimen is a mixed fracture of tough and brittle.