Cu 표면에 Ni기 합금의 레이저 클래딩에 미치는 공정인자의 영향

• 영문명: Effects of processing parameters on the laser clad for Ni-based alloy on Cu substrate
• 발행기관: 한국레이저가공학회
• 저자명: I.S. Eom(엄인섭) B.S. Jo(조범석) S.H. Lee(이상훈) C.H. Ye(예창호) Chung-Yun Kang(강정윤)
• 간행물 정보: 『한국레이저가공학회 학술대회 논문집』2007년도 춘계학술발표대회 논문집, 65~69쪽, 전체 5쪽
• 주제분류: 공학 > 기계공학
• 파일형태: PDF
• 발행일자: 2007.06.30

영문 초록

  The electroplating of Ni or NiB on the Cu substrate has been conducted to improve the wear resistance and thus to increase the service life of continuous casting mold (Cu-1 wt%Cr-0.2wt%Zr). In this study, the characteristics of laser cladding with nickel-based alloy on Cu substrate were investigated to enhance the performance of casting mold at high temperature. In order to accommodate the difference of thermal expansion coefficient between Cu substrate and Ni-based alloy, Ni electroplated intermediate bonding layer was introduced between Cu substrate and Ni-based coating layer. The study investigated that the laser cladding parameters, such as powder carrying gas flow, powder feed rate and gun travel speed, had an effect on the clad thickness. Cracks and porosities were found at the interface between the cladding layer and the electroplated Ni layer. Or, they were detected in the layer for high cladding thickness. The substrate preheating restraint the crack initiation during cooling by reducing thermal stresses. Preheating temperature had relationship with porosity or crack occurred in the laser cladding layer. Hardness of laser cladding layer is 458.5Hv, Ni coating layer is 106Hv and Cu substrate is 128Hv.

목차

Abstract
1. 서론
2. 실험방법
3. 실험결과
4. 결론 및 고찰
참고문헌

키워드

Laser cladding Ni-based alloy Processing parameter Vickers hardness