다중 적층된 이종소재 레이저 용접시 레이저 빔의 열영향 분석에 대한 연구 (A Study on Heat Flow Affects on Multiplies Dissimilar Material Laser Beam Welding)

서지정보

· 발행기관 : 한국기계가공학회
· 수록지 정보 : 한국기계가공학회지 / 23권 / 3호 / 8 ~ 14페이지
· 저자명 : 최해운

초록

The results of a numerical analysis of the joining of copper and aluminum in a laser welding process are presented. The laser beam was arranged parallel to the two spots with a 1 mm offset and the layers in two cases were studied to determine the heat flux tendency. For the Cu-Al-Cu layer, the heat flows in a two-dimensional tendency. The heat flow from the more conductive material to the less conductive material acted as a heat shield. However, in the Al-Cu-Al layer, heat flows in a three-dimensional trend. The heat flow from the less conductive material to the more conductive material acted as a heat sink that redistributed the heat flow to adjacent layers with higher thermal conductivity. Comparing the heat flux along the z-direction or thickness, it was found that the Al-Cu-Cu laminated material had more than three times higher thermal conductivity than the Cu-Al-Cu laminated material, supporting three-dimensional directional heat transfer and efficient laser welding. The heat distribution in multilayer materials by laser welding is an important analysis step to understand the heat flow for high weld quality and high productivity processes.

영어초록

The results of a numerical analysis of the joining of copper and aluminum in a laser welding process are presented. The laser beam was arranged parallel to the two spots with a 1 mm offset and the layers in two cases were studied to determine the heat flux tendency. For the Cu-Al-Cu layer, the heat flows in a two-dimensional tendency. The heat flow from the more conductive material to the less conductive material acted as a heat shield. However, in the Al-Cu-Al layer, heat flows in a three-dimensional trend. The heat flow from the less conductive material to the more conductive material acted as a heat sink that redistributed the heat flow to adjacent layers with higher thermal conductivity. Comparing the heat flux along the z-direction or thickness, it was found that the Al-Cu-Cu laminated material had more than three times higher thermal conductivity than the Cu-Al-Cu laminated material, supporting three-dimensional directional heat transfer and efficient laser welding. The heat distribution in multilayer materials by laser welding is an important analysis step to understand the heat flow for high weld quality and high productivity processes.

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