Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Impact Toughness and Cracking Behavior of a Railroad Weldment with Preheating Conditions

예열온도 변화에 따른 레일용접부의 충격인성 및 균열특성

  • Lee, Hae-Woo (Welding Research Team, Shiping & Plant Institute, Samsung Heavy Industries, Co., Ltd.) ;
  • Shin, Yong-Teak (Welding Research Team, Shiping & Plant Institute, Samsung Heavy Industries, Co., Ltd.)
  • 이해우 (삼성중공업 조선플랜트연구소 용접연구팀) ;
  • 신용택 (삼성중공업 조선플랜트연구소 용접연구팀)
  • Published : 1998.03.31
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Abstract

High carbon steel is used for rails due to the excellent wear resistance, however the welding of high carbon steel is more difficult than that of mild steel owing to the high hardenability and sensitivity to cracking at the weldment. In this study, the impact toughness and cracking behavior of a rail weldment were evaluated as function of preheating temperatures. Impact toughness were more excellent in the specimen welded with preheating temperature above $250^{\circ}C$ than that below $100^{\circ}C$, and cracks were not detected in the specimen welded with preheating temperature above $250^{\circ}C$.

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