Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Process Analysis of Melting Behaviors in Selective Laser Melting Process

선택적 레이저 용융 공정시 용융 거동에 대한 공정 분석

  • 성민영 (부산대학교 정밀기계공학과) ;
  • 주병돈 (부산대학교 정밀기계공학과) ;
  • 김수희 (부산대학교 정밀기계공학과) ;
  • 문영훈 (부산대학교 정밀기계공학과/정밀정형 및 금형가공연구소)
  • Received : 2010.11.03
  • Accepted : 2010.11.24
  • Published : 2010.12.01
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Abstract

Selective laser melting (SLM) is emerged as a new manufacturing technique to directly fabricate precise parts using metallic materials. The final characteristics of a component fabricated through the SLM process are strongly dependent upon various parameters such as laser power, scan rate and pulse duration, etc. This paper, therefore, focuses on the dimensional characteristics of melted $20{\mu}m$ Fe-Cr-Ni powder by fiber laser for the selective laser melting process. With energy density decrease, the height and depth were decreased. Although the conditions are of the same energy density, the shape is different by laser power and scan rate. The shapes at various laser parameters were divided into 3 groups based on depth over height. The smooth regular shape is obtained under the conditions of $50{\mu}m$ of powder height and $15-20{\mu}s$ of pulse duration. And the laser power influenced the variation of shape more significantly than the scan rate.

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References

  1. W. Zhengying T. Yiping, L. Bingheng, 2003, A rapid manufacturing method for water-saving emitters for crop irrigation based on rapid prototyping and manufacturing, Int. J. Adv. Manu. Technol., Vol. 21, pp. 644-648. https://doi.org/10.1007/s00170-002-1384-1
  2. Y. Ding, H. Lan, J. Hong, D. Wu, 2004, An integrated manufacturing system for rapid tooling based on rapid prototyping, Rob. Comput. Integr. Manuf., Vol. 20, pp. 281-288. https://doi.org/10.1016/j.rcim.2003.10.010
  3. K. Osakada, M. Shiomi, 2006, Flexible manufacturing of metallic products by selective laser melting of powder, Int. J. Mach. Tools Manuf., Vol. 46, pp. 1188-1193. https://doi.org/10.1016/j.ijmachtools.2006.01.024
  4. J. P. Kruth, L. Froyen, J. Van Vaerenbergh, P. Mercelis, M. Rombouts, B. Lauwers, 2004, Selective laser melting of iron-based powder, J. Mater. Process. Technol., Vol. 149, pp. 616-622. https://doi.org/10.1016/j.jmatprotec.2003.11.051
  5. I. Yadroitsev, L. Thivillon, Ph. Bertrand. I. Smurov, 2007, Strategy of manufacturing components with designed internal structure by selective laser melting of metallic powder, Appl. Surf. Sci., Vol. 254, pp. 980-983. https://doi.org/10.1016/j.apsusc.2007.08.046
  6. J. W. Rho, J. H. Kim, C. K. Lee, 2008, An overview of Selective Laser Sintering, J. Kor. Weld. Joining. Soc., Vol. 26, No. 4, pp. 34-37. https://doi.org/10.5781/KWJS.2008.26.4.034
  7. A.V. Gusarov, I. Yadroitsev, Ph. Bertrand, I. Smurov, 2007, Heat transfer modeling and stability analysis of selective laser melting, Appl. Surf. Sci., Vol. 254, pp. 975-979 https://doi.org/10.1016/j.apsusc.2007.08.074
  8. E. Capello, B. Previtali, 2006, The influence of operator skills, process parameters and materials on clad shape in repair using laser cladding by wire, J. Mater. Process. Technol., Vol. 174, pp. 223-232. https://doi.org/10.1016/j.jmatprotec.2006.01.005
  9. B. C. Jeon, J. D. Kim, 1998, Selective Laser Sintering by $CO_2$ Laser, J. Kor. Soc. Prec. Eng., Vol. 15, pp. 18-25.

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