In this study, the cold rolled DP590 FSW joints were obtained by the position control type of the FSW machine and examined. The FSW weldability was investigated using the Si3N4 tool specially made by Cold Isostatic Press (CIP). Defect-free joints were formed at 180-300 mm/min at 800 rpm. However, a groove-like defect was observed along the joint line of the advancing side due to the insufficient material flow. In addition, the life of the Si3N4 tool was compared to that of the polycrystalline cubic boron nitride (PCBN) tool for the durability. The SI3N4 tool that was broken in which tool reached a length of 5 m and around half of the performance level of the PCBN tool.

1. 서 론
 2. 실험 방법
  2.1 실험 재료
  2.2 접합 장비 및 조건
 3. 실험 결과 및 고찰
  3.1 접합부 품질과 입열량과의 관계
  3.2 적정접합조건범위의 설정
  3.3 용접부 경도 및 미세조직관찰
  3.4 기구 내구성 평가
 4. 결 론
 References

• 김영곤(Member, Korea Institute of Industrial Technology) | Young- Gon K im Corresponding author
• 김인주(Korea Institute of Industrial Technology) | In- Ju K im