冷金属转移焊接修复参数对铸造镁合金表面缺陷修复成形的影响

IF 2.4 4区 材料科学 Q2 CRYSTALLOGRAPHY Crystals Pub Date : 2024-07-26 DOI:10.3390/cryst14080679
Zenghui Cai, Faming Shen, Qihao Chen, Zhien Chen, Yanfeng Cui, Tongge Shao, Bolun Dong, Sanbao Lin, Xiaoyu Cai
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引用次数: 0

摘要

采用电弧焊方法修复 ZM6 铸造镁合金表面缺陷在工程领域具有重要意义。与传统的钨极惰性气体(TIG)焊接修复技术相比,冷金属转移(CMT)焊接修复具有输入热量低、修复变形小、效率高等优点。采用 CMT 焊接修复 ZM6 铸造镁合金表面缺陷具有重要的研究价值。本文系统研究了 CMT 焊接修复参数对缺陷修复成形的影响,获得了无未熔合缺陷的修复工艺窗口。采用表面堆焊法研究了母材预热温度、送丝速度、焊接速度、焊丝伸出长度和保护气体流量对镁合金熔体扩散和焊缝成形的影响。在焊接过程中,使用照相机捕捉电弧和熔滴特征的图像。在铸件表面加工了一个深度为 11.5 毫米的凹坑缺陷,并研究了五种不同的修补路径对修补区形成的影响。为了使修补区有更好的熔合效果,合理的修补参数如下:预热温度范围为 310-450 ℃,送丝速度范围为 5-7 m/min,焊接速度范围为 8-10 mm/s,焊丝伸出长度为 12 mm,保护气体流量为 20 L/min,修补路径采用连续线性往复焊接路径。该研究对铸镁合金 CMT 修复技术的发展具有重要的指导意义。
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Effect of Cold Metal Transfer Welding Repair Parameters on the Forming for the Repair of Surface Defects of Cast Magnesium Alloy
It is of great significance in the field of engineering to repair the surface defects of ZM6 cast magnesium alloy by an arc welding method. Compared with the traditional tungsten inert gas (TIG) welding repair technology, cold metal transfer (CMT) welding repair has the advantages of low heat input, small repair deformation, and high efficiency. It is of great research value to repair the surface defects of ZM6 cast magnesium alloy by CMT welding. In this paper, the effect of CMT welding repair parameters on defect repair forming is systematically studied, and a repair process window free of unfused defects is obtained. The effects of preheating temperature of base material, wire-feeding speed, welding speed, stick-out length of welding wire and shielding gas flow on the spread of magnesium alloy melt and weld formation were investigated by a surface surfacing method. During the welding process, a camera was used to capture images of the arc and droplet features. A pit defect with a depth of 11.5 mm was machined on the surface of the casting, and the effect of five different repair paths on the formation of the repair area was studied. In order to make the repair area have better fusion, reasonable repair parameters are as follows: The preheating temperature range is 310–450 °C, the wire-feeding speed range is 5–7 m/min, the welding speed range is 8–10 mm/s, the stick-out length of the welding wire is 12 mm, the shielding gas flow rate is 20 L/min, and the repair path adopts a continuous linear reciprocating welding path. This study has important significance for guiding the development of CMT repair technology of cast magnesium alloy.
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来源期刊
Crystals
Crystals CRYSTALLOGRAPHYMATERIALS SCIENCE, MULTIDIS-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
4.20
自引率
11.10%
发文量
1527
审稿时长
16.12 days
期刊介绍: Crystals (ISSN 2073-4352) is an open access journal that covers all aspects of crystalline material research. Crystals can act as a reference, and as a publication resource, to the community. It publishes reviews, regular research articles, and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on article length. Full experimental details must be provided to enable the results to be reproduced. Crystals provides a  forum for the advancement of our understanding of the nucleation, growth, processing, and characterization of crystalline materials. Their mechanical, chemical, electronic, magnetic, and optical properties, and their diverse applications, are all considered to be of importance.
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