Characteristics of short-circuit behaviour and its influencing factors in self-shielded flux-cored arc welding. (February 2016)

• Record Type: Journal Article
• Authors: Zhu, Z.; Fan, K.; Liu, H.; Ma, G.
• Is Part Of: Science and technology of welding & joining. Volume 21:Number 2(2016)
• Page Start: 91
• Page End: 98
• Publication Date: 2016-02
• Subjects: Self-shielded flux-cored wire -- Short-circuit behaviour -- Characterisation by electric information -- Explosive spatter; Welding -- Periodicals; Joints (Engineering) -- Periodicals; Surfaces (Technology) -- Periodicals; 671.52
• DOI: 10.1179/1362171815Y.0000000069
• Languages: English
• ISSNs: 1743-2936

Abstract

Abstract : The characteristics of short-circuit behaviour during the process of self-shielded flux-cored arc welding and its corresponding welding electric information are investigated by a synchronous acquisition system of high-speed images and welding electric information. The research results show that when the welding arc between the wire tip and the weld pool extinguishes, a short-circuit event occurs and its corresponding arc voltage is below ∼10 V, which can be used to judge the occurrence of the short-circuit procedure. Meanwhile, the influence of welding process setting parameters on the short-circuit behaviour is explored in detail. The existence of liquid slag increases the difficulty of arc re-ignition, which makes it easy to produce weld defects. Therefore, the short-circuit procedure in self-shielded flux-cored arc welding should be avoided as much as possible.