水下脉冲电流FCAW第1部分:波形和工艺特征

IF 2.2 3区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING
C. Jia, Junfei Wu, Yanfei Han, Yong Zhang, Qingyuan Yang, Chuansong Wu
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引用次数: 6

摘要

传统水下药芯焊丝电弧焊(FCAW)中典型的金属转移模式提供了低频率的大液滴排斥转移。工艺稳定性和焊接质量严重恶化,飞溅严重,电弧频繁熄灭。人们认为,通过快速降低焊接电流,使液滴下垂和振荡,可以减少施加在液滴上的排斥力。提出了一种新型的水下脉冲电流FCAW,用于周期性调节液滴受力。实验系统是用专门设计的脉冲电流和可靠的弧长控制开发的。同时采集视觉信号和电信号来研究过程特征。发现最大液滴直径减小到小于5mm;临时灭弧频率显著下降;几乎没有短路转移和表面张力转移;焊接过程的稳定性显著提高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Underwater Pulse-Current FCAW - Part 1: Waveform and Process Features
The typical metal transfer mode in conventional underwater wet flux cored arc welding (FCAW) delivers large droplet repulsive transfer with low frequency. The process stability and the weld quality are seriously deteriorated with significant spatter and frequent arc extinctions. It is thought the repulsive forces applied on droplets can be reduced by rapidly decreasing the welding current, making the droplets sag and oscillate. A novel underwater pulsecurrent FCAW was proposed to periodically regulate the forces applied on droplets. The experimental system was developed with specially designed pulse current and reliable arc length control. Visual and electrical signals were collected simultaneously to study the process features. It was found that the maximum droplet diameter decreased to less than 5 mm; the temporary arc-extinguishing frequency decreased significantly; there was almost no short-circuit transfer and surface-tension transfer; and the stability of the welding process was significantly improved.
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来源期刊
Welding Journal
Welding Journal 工程技术-冶金工程
CiteScore
3.00
自引率
0.00%
发文量
23
审稿时长
3 months
期刊介绍: The Welding Journal has been published continually since 1922 — an unmatched link to all issues and advancements concerning metal fabrication and construction. Each month the Welding Journal delivers news of the welding and metal fabricating industry. Stay informed on the latest products, trends, technology and events via in-depth articles, full-color photos and illustrations, and timely, cost-saving advice. Also featured are articles and supplements on related activities, such as testing and inspection, maintenance and repair, design, training, personal safety, and brazing and soldering.
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