摘要
目的探究电弧熔丝增材工艺和热处理制度对ZL114A修复件组织性能的影响规律,为后续实际修复提供参考。方法基于电弧熔丝增材沉积技术对T6态ZL114A铝合金进行修复,对比了不同电弧模式对增材修复交界区冶金结合的影响,并分析了电弧增材修复对修复区组织变化和力学性能的影响。结果采用CMT-P电弧模式进行增材修复能够实现良好的冶金结合,但在增材修复交界区域存在共晶硅的聚集;增材修复区域的共晶硅呈片状连续分布。修复区显微硬度远小于T6态基体的显微硬度,且交界区存在0.5 mm左右的热影响区。经T6全域热处理可以显著提升修复件的整体性能,使基体热影响区消失,修复件抗拉强度、延伸率分别达到338 MPa、5.6%。结论与未热处理前相比,热处理后修复件的抗拉强度和延伸率均有所提升,修复试样力学性能达到HB962标准。
The work aims to explore the effects of the wire arc additive process and heat treatment system on the ZL114A repair parts,so as to provide a reference for the subsequent on-site repair.Wire arc additive technology was used to repair the cast T6 temper aluminum alloy ZL114A.The effects of different arc modes on the repaired interface were compared,and the microstructure and mechanical properties of the repaired area were analyzed.The results showed that good metallurgical bond-ing could be achieved by repairing with the CMT-P arc mode,and aggregation of eutectic silicon existed in the repaired interface.Eutectic silicon in the additive repair region showed a continuous sheet-like distribution.The microhardness in the repaired area was significantly lower than that of the T6 tempered substrate,and there was a heat affected zone with approximately 0.5 mm at the interface.The performance of the repaired part could be significantly improved by the overall heat treatment.The heat af-fected zone of the substrate disappeared.The tensile strength and elongation of the repaired part were improved compared with those before heat treatment,which reach 338 MPa and 5.6% respectively.Compared with those before heat treatment,both the tensile strength and the elongation of the repaired parts increase after heat treatment,and the mechanical properties of the re-paired samples reach the HB962 standard.
作者
宾浩宇
梁洁
李然
王颢铭
张宏凯
方学伟
黄科
BIN Haoyu;LIANG Jie;LI Ran;WANG Haoming;ZHANG Hongkai;FANG Xuewei;HUANG Ke(Aecc South Industry Company Limited,Hunan Zhuzhou 410000,China;Aecc Hunan Power Machinery Research Institute,Hunan Zhuzhou 410000,China;School of Mechanical Engineering,Xi'an Jiaotong University,Xi'an 710049,China)
出处
《精密成形工程》
北大核心
2025年第8期161-168,共8页
Journal of Netshape Forming Engineering
基金
国家自然科学基金面上项目(52275374)。
