DOI QR코드

DOI QR Code

A Study on Laser Welding of the Seat Back Frame Applied by High Strength Steels

고장력 강판을 적용한 Seat Back Frame의 레이저용접에 관한 연구

  • 설현욱 (엔케이에스주식회사 기술연구소) ;
  • 정병훈 (엔케이에스주식회사 기술연구소) ;
  • 김석원 (울산대학교 물리학과)
  • Received : 2017.01.09
  • Accepted : 2017.03.28
  • Published : 2017.06.30

Abstract

The automotive industry is in constant pursuit of alternative materials and processes to address the ever changing needs of their customers and the environment. Applications of laser welding have increased steadily in recent years due to its benefits including high speed, high productivity, and high energy density of heat source. This paper investigated the relationship between laser welding parameters and penetration characteristics. The Welding power was fixed at 5kW and welding speeds were varied for the thickness of the workpiece material. Full penetration occurred in the energy per unit area of $21J/mm^2$. The hardness of the weld zone was different for each strength of the workpiece material, however the lowest hardness values were the same in the heat-affected zone.

Keywords

References

  1. J. G. Byeon, K. S. Park, W. J. Han and S. H. Shim, Welding Characteristics of Inconel Plate Using Pulsed Nd:YAG Laser Beam, Journal of Korean Society of Laser Processing, 3(2000), 12-20 (in Korean)
  2. C. V. David, Role of the Seat in Rear Crash Safety, Society of Automotive Engineers, (2002)
  3. Ki-Chul Kim, Effect of laser process parameters on weld characteristics of structural steels, (1992), 1-10
  4. Steffen. Neumann, Claus Thomy, Thomas Seefeld, Frank Vollertsen, Distorion Minimization and Shielding gas Flow Optimization in $CO_2$ Laser Remote Welding of Steel, ICALEO 2005(2006)
  5. Chung-Yun Kang, Hardening Characteristics and Carbon Equivalent in Laser Welds of Advanced High Strength Steels for Automobile, Journal of KWJS, 29(6) (2011), 15-25 (in Korean)
  6. M. Ono, Nakada, S. Kosuge, An Investigation on $CO_2$ Laser induced Plasma, Journal of JWS, 10(2), (1992), 239-245 (in Japanese)
  7. H. Park, S. Rhee, Development of a Weld Quality Monitoring System in CO2 Laser Welding by using Photodiode, Journal of Laser Application, 13(1) (2001), 12-18 (in Korean) https://doi.org/10.2351/1.1342163
  8. W. Gatzweiler, D. Maischner and E. Beyer, On-line Diagnostics for Process-control in Welding with $CO_2$ Lasers, SPIE 1020(1989), 142-148
  9. R. Shatma, P. Molian and F. Peters, Geometric Variability and Surface Finish of Weld Zones in Yb:YAG Laser Welded Advanced High Strength Steels, Journal of Manufacturing Processes, 12(2010), 78-84
  10. William M. Steen, Laser Material Processing(3th Edition), Springer, (2003), 162-176
  11. J.K. Choi, M.J. Kang, J.H. Cho, C.H. Kim, Laser Welding Characteristics of Ultra High Strength Steel for Automotive Application, Journal of KWJS, 27(5) (2009), 1-4 (in Korean)