Blowhole Generation Phenomenon and Quality Improvement in GMAW of Galvanized Steel Sheet

Autor:	Reiichi Suzuki, Toshiro Uezono, Kazuki Nakamura, Shun Izutani, Kei Yamazaki, Yuji Ueda
Rok vydání:	2013
Předmět:	Engineering Blowhole (geology) geography symbols.namesake geography.geographical_feature_category business.industry Mechanical Engineering Metallurgy symbols business Industrial and Manufacturing Engineering Galvanization Gas metal arc welding
Zdroj:	International Journal of Automation Technology. 7:103-108
ISSN:	1883-8022 1881-7629
DOI:	10.20965/ijat.2013.p0103
Popis:	In the automotive industry, galvanized steel sheets have been applied for quality improvement. However, it has a problem of the weldability debasement by porosity defect (blowhole, pit) and spatter increase. In this study, the blowhole generating behavior which was not clarified until now has been observed by the high-intensity X-ray imaging apparatus. And the method to make reduce both of the porosity defects and the spatter has been examined. In the result, the measure was effective that the porosity defect is released as zinc vapor from just under the arc to outside of the molten pool. Based on this knowledge, a solution to problem was accomplished by optimizing (a) composition and size of welding wire, (b) shielding gas composition and (c) current pulse wave pattern.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f8fc40d3945628a210b6b533e9d3ca67 https://doi.org/10.20965/ijat.2013.p0103 Zobrazit plný text záznamu