Browse > Article

Resistance Spot Weldability of Ferritic Stainless Steel and Galvanized Steel  

Kim, Jeong-Kil (POSCO Technical Research Lab.)
Woo, In-Su (POSCO Technical Research Lab.)
Jeong, Bo-Young (POSCO Technical Research Lab.)
Lee, Jong-Bong (POSCO Technical Research Lab.)
Publication Information
Journal of Welding and Joining / v.24, no.6, 2006 , pp. 39-43 More about this Journal
Abstract
A ferritic stainless steel, STS430, and a galvanized steel for case and frame of electronic goods are welded by resistance spot welding and resistance projection welding methods. In this study, resistance spot welding has been performed to investigate the weldability of dissimilar materials such as a ferritic stainless steel and a galvanized steel. Tensile load of the spot weld without heat treatment was 196 kN and brittle fracture occurred at interface between STS430 and nugget due to the high hardness, 380 Hv, in nugget. It was found that the hardness of as-welded nugget increased with higher cooling rate during resistance spot welding by comparing with GTA weld of same materials. Heat treatment by applying second current made nugget softened. Tensile load of heat treated weld increased and reached to 303 kN and fracture occurred at base metal, a galvanized steel.
Keywords
Resistance spot welding; Ferritic stainless steel; Galvanized steel; Nugget;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Shoji Inoue, Katsuhito Fukumura and Satoshi Soga : Spot welding of Aluminum alloy sheets to coated steel sheets, Nippon steel technical report, 69,(1994)
2 Kinya Ichikawa : Spot welding and projection welding, J of JWS, 64-2 (1995) (in Japanese)
3 I.H Heu, C.K Lee and B.D Chae : The quality evaluation on resistance spot welding of 2024 aluminum alloy and zinc coated steel, J of KWS, 12-4 (2001) (in Korean)
4 H.I. Shin and S.S Kang : A study on the spot weldability of high strength steel sheet and two stories galvannealed high strength steel sheet, J. of KWS, 12-3 (1994) (in Korean)
5 Riei Ichikawa, Teruo Ohashi : Resistance Spot Welding of Dissimilar Metals-Commercial Pure Titanium to Some Aluminum Alloys, J of JWS, 48-10 (1979) (in Japanese)
6 Murat Vural, Ahmet Akkus : On the resistance spot weldability of galvanized interstitial free steel sheet with austenitic stainless steel sheet, Journal of materials processing technology, 1-6 (2004)
7 Norman A. Freytag : A comprehensive study of spot welding galvanized steel, Welding research supplement, April, (1965)
8 U. Bernabai, A. Brotzu and F. Felli : Analysis of the problems in spot welding AISI 301 high strength austenitic stainless steel and galvanized steel plates, W J, 11 (1997)
9 Assessment of the torsion test for resistance spot welds : K.I. Johnson, The welding institute (1999)