Effect of Temperature and Water Assumtion on Strength of Spot Welded Zine Steel Plates

점용접 아연도금판의 강도특성에 대한 온도 및 침수의 영향

  • 서도원 (전북대학교 공대 기계설계학과 재료 및 파괴역학 연구실) ;
  • 윤호철 (전북대학교 공대 기계설계학과 재료 및 파괴역학 연구실) ;
  • 최준용 (전북대학교 공대 기계설계학과 재료 및 파괴역학 연구실) ;
  • 임재규 (전북대학교 기계항공시스템공학부, 공학연구원 공업기술연구센터)
  • Published : 2003.04.23

Abstract

Spot welded structure is operated in diverse situation because of temperature, humidity and precipitation. In addition factors of environmental pollution such as acid rain, that courses corrosion, have the tendency to increase, But spot welded structure strength is affected by dampness and environment temperatures. Therefore, it is important to evaluate effect of temperature of spot welded part, In this study, the strength distribution of spot welded plates is evaluated about the environmental temperature of zine coated steel plates and test is conducted with welded part immersed in distilled and synthetic sea water. Specimens are immersed into water for 10, 100, 500 and 1000hours to evaluate the effects of water immersion time on tensile-shear strength under the conditions of -40, 0, 20 and $50^{\circ}C$. Strength is evaluated by tensile-shear test. The conditions of spot welding are 240kgf electrode force, 10KA welding current with 0 and 5mm clearance. From this study, spot welded specimens with clearance have lower tensile-shear strength in the distilled water or synthetic sea water comparing with spot welded specimens without clearance. And they have lower tensile-shear strength under $-40^{\circ}C$ and over $50^{\circ}C$.

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