Effect of Zn Vaporization on Wetting of Al-galvanized Steel in Cold Metal Transfer Process

• Published in: Journal of iron and steel research, international Vol. 23; no. 6; pp. 566 - 572
• Main Authors: LIN, Qiao-li, MAO, Gao-jun, HUANG, Qian, CAO, Rui, CHEN, Jian-hong
• Format: Journal Article
• Language: English
• Published: Singapore Elsevier Ltd 01.06.2016; Springer Singapore
• Subjects: Al-galvanized steel; Applied and Technical Physics; capillarity; cold metal transfer; Engineering; interface; Machines; Manufacturing; Material; Materials Engineering; Materials Science; Metallic Materials; Physical Chemistry; Processes; wetting; Zn vaporization; 润湿性; 热镀锌钢; 蒸发; 转移过程; 送丝速度; 金属; 铝合金; 高速摄像机; Zn vaporization; wetting; interface; Al-galvanized steel; capillarity; cold metal transfer
• ISSN: 1006-706X; 2210-3988
• DOI: 10.1016/S1006-706X(16)30089-9

The wetting of galvanized steel by molten Al alloys was studied in the cold metal transfer process by the sessile drop method using a high speed video camera.The wetting behavior can be divided into two typical cases,trending of non-wetting by using small wire feeding speed and wetting by using large wire feeding speed.The Leidenfrost effect is caused by the volatilization of Zn,which is responsible for the former case.The enhanced wettability of steel by Al and the weakening of the Leidenfrost effect are responsible for the latter case.Zn is the destabilizing factor for Al-steel joining that needs to be avoided by a reasonable design of process.