Recently, applied areas of nonferrous materials have been expanded in terms of efficiency of materials used and cost reduction. And, in accordance with compactness and accuracy of parts, the need of joining of dissimilar materials is raised. Accordingly, this study aimed at finding out the optimal welding current value(6.3～6.5kA) considering tensile strength, fracture test and welding residue after joining with various welding conditions by means of copper pipe(Φ7.0 × t0.5) and aluminium pipe(Φ7.0 × t0.7) using an eutectic diffusion bonding machine.

Abstract
 1. 서론
 2. 용접장치
 3. 실험 및 방법
  3.1 시편제작
  3.2 용접시편
  3.3 인장시험
  3.4 파괴시험
 4. 결과 및 고찰
 5. 결론
 References

• 이윤기(조선이공대학교 자동차과 교수) | Yoon Ki Lee
• 선신규((주)광진전자 상무이사) | Shin Kyu Sun