강과 알루미늄의 레이저 접합에 관한 연구 Part 1 : 접합 변수의 최적 조건에 관한 연구 = A Study on Laser Joining of Low Carbon Steel and Aluminum Alloy Part 1 : Process Parameters

다국어 초록 (Multilingual Abstract)

Steel has been mainly used in the automotive industry, because of good mechanical properties, weldability and so on. However, there has been increase in using aluminum to reduce the weight of vehicle. This leads to improve fuel efficiency and to reduce air pollution. A steel-aluminum hybrid body structure is recently used not only to reduce the weight of vehicle but also to increase safety. In this paper, the laser beam joining method is suggested to join steel and aluminum. To avoid making brittle intermetallic compounds(IMC) that reduce mechanical properties of the joint area, only aluminum is melted by laser irradiation and wetted on the steel surface. The brittle IMC layer is formed with small thickness at the interface between steel and aluminum. By controlling the process parameters, brittle IMC layer thickness is suppressed under 10 micrometers which is a criterion to maintain good mechanical properties.

참고문헌 (Reference)

1 "Recent development in aluminum alloys for automotive industry" A280 : 37-49, 2000

2 "Light-weight structures produced by laser beam joining for future applications in automobile and aerospace industry" 115 : 2-8, 2001

3 "Laser roll bonding of low carbon steel and aluminum alloys for a hybrid structure" 30-36, 2002

4 "Laser brazing of aluminum" 143 (143): 651-655, 2003

5 "Joining techniques for aluminum spaceframes used in automobiles PartⅡ-adhesive bonding and mechanical fasteners" 99 : 72-79, 2000

6 "Joining techniques Joining techniques for aluminum space frames used in automobiles. PartⅠ-solid and liquid phase weldingfor aluminum space frames used in automobiles. PartⅠ-solid and liquid phase welding Journal of Materials Processing Technology" 99 : 62-71, 2000

7 "Joining of aluminum alloy 5052 and low-carbon steel by laser roll welding" 83 : 16s -26s, 2004