The purpose of this study is to investigate cutting characteristics and wear behavior in SCM440 steel with different cutting tools, CBN(Cubic Boron Nitride) and coated CBN. During the test coated CBN toolespecially with TiAlN showed better wear resistance behavior than orginal CBN tools. In the interruptedcutting condition, axial groove affected tool surface with impact force during the turning operation. Foradvantageous turning parameter in the interrupted process it is recommendable that lower speed. Also surface roughness showed better behavior in the coated CBN tool conditions than normal CBN conditions. Mainly this is caused by reduced friction between material and tool surface with coated layer.

Abstract
 1. 서론
 2. 실험 방법
  2.1 실험재료 및 방법
  2.2 절삭조건 및 공구선정
 3. 실험결과 및 고찰
  3.1 초기절삭력 평가
  3.2 단속방향에 따른 절삭력의 변화추세
  3.3 절삭길이에 따른 표면거칠기 변화
  3.4 공구수명
 4. 결론
 참고문헌

• 방홍인(전북대학교 공과대학 일반대학원) | H.I. Bang
• 신형곤(전북대학교 기계시스템 공학부) | H.G. Shin
• 오성훈(전북대학교 기계시스템 공학부) | S.H. Oh
• 김태영(전북대학교 기계시스템 공학부) | T.Y. Kim