Journal of the Korean Society of Manufacturing Technology Engineers (한국생산제조학회지)

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
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Multi-thin plate welding characteristics of Low Carbon Steel for Ni-MH battery of using Continuous Wave Nd:YAG laser

연속파 Nd:YAG 레이저를 이용한 Ni-MH전지용 저탄소강의 다층 박판 용접 특성

  • 양윤석 (조선대학교 첨단부품소재학과 (정밀기계설계공학)) ;
  • 황찬연 (조선대학교 첨단부품소재학과 (정밀기계설계공학)) ;
  • 유영태 (조선대학교 메카트로닉스공학과)
  • Received : 2011.06.15
  • Accepted : 2011.08.30
  • Published : 2011.12.15
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Abstract

Lap joint welding conducts low carbon steel plates using a 2.0kW continuous wave Nd:YAG laser beam. The specimen is composed of thin plate of 20 sheets. Process Variables contain two controlled parameters of the laser power and the welding speed. In order to quantitatively examine the characteristics of the lap welding, the welding quality of the cut section, stain-stress behavior, and the hardness of the welded part are investigated. The weld width difference between the top and the bottom because the welding speed is increased. The reason, cooling rate is decreased because of fast welding speed. When the heat input is higher, larger volume of the base metal will melt and the welding heat has longer time to conduct into the bottom from the top. The microstructure and tensile properties of the joints are investigated in order to analyze the effects of heat input on the quality of laser welded specimen. From the results of the investigation, We observe that welding quality is good for the laser power of 1800W, and laser welding speed from 1.8m/min to 2.2m/min.

Keywords

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