single-au.php

IJAT Vol.7 No.1 pp. 103-108
doi: 10.20965/ijat.2013.p0103
(2013)

Paper:

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

Shun Izutani*, Kei Yamazaki*, Reiichi Suzuki*,
Yuji Ueda**, Kazuki Nakamura**, and Toshiro Uezono**

*KOBE STEEL,LTD.Welding Business, 100-1 Miyamae, Fujisawa, Kanagawa

**DAIHEN Corporation, Welding & Mechatronics Company, 4-1 Koyocho-nishi, Higashinada-ku, Kobe, Hyogo

Received:
July 9, 2012
Accepted:
November 7, 2012
Published:
January 5, 2013
Keywords:
galvanized steel sheet, blowhole, pit, spatter, X-ray imaging system
Abstract

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.

Cite this article as:
S. Izutani, K. Yamazaki, R. Suzuki, <. Ueda, K. Nakamura, and T. Uezono, “Blowhole Generation Phenomenon and Quality Improvement in GMAW of Galvanized Steel Sheet,” Int. J. Automation Technol., Vol.7, No.1, pp. 103-108, 2013.
Data files:
References
  1. [1] K. Yamazaki, et al., “Blowholes generate phenomenon in GMAW of galvanized steel sheet,” Preprints of the national meeting of JWS, No.90, pp. 90-91, 2012.
  2. [2] S. Izutani, et al., “Blowholes reduction in GMAW of galvanized steel sheet (Part 1),” Preprints of the national meeting of JWS, No.90, pp. 92-93, 2012.
  3. [3] K. Nakamura, et al., “Blowholes reduction in GMAW of galvanized steel sheet (Part 2),” Preprints of the national meeting of JWS, No.90, pp. 94-95, 2012.
  4. [4] Y. Ueda, et al., “Spatter reduction in pulsed MAG welding of galvanized steel sheet,” Preprints of the national meeting of JWS, No.90, pp. 96-97, 2012.

*This site is desgined based on HTML5 and CSS3 for modern browsers, e.g. Chrome, Firefox, Safari, Edge, IE9,10,11, Opera.

Last updated on Nov. 18, 2019