Paper Title:
Research on Technics of Laser Direct Metal Deposition Forming Technology
  Abstract

The technological parameters of laser direct metal deposition (DMD) were researched by DMD forming experiments using 2Cr13 powder. Fixing other parameters, the lower of laser power, the smaller the characteristic sizes of cladding layer are. Increasing of laser power, cladding height would firstly increase and then decrease, cladding width would firstly increase and then almost maintain constant, while cladding depth would gradually increase. When other parameters are invariable, with increasing of powder feeding speed, cladding height would increase, cladding width and cladding depth would decrease. When other parameters are invariable, cladding width, cladding height and cladding depth would decrease with the adding of scanning speed. The microstructure of single track cladding had three typical patterns, cellular dendritic, column dendritic and equiaxed crystal. The patterns depended on the temperature gradient and the solidification velocity. Under different technical parameters, the average hardness of specimens would change from 300HV0.2 to 550HV0.2.

  Info
Periodical
Advanced Materials Research (Volumes 69-70)
Edited by
Julong Yuan, Shiming Ji, Donghui Wen and Ming Chen
Pages
54-58
DOI
10.4028/www.scientific.net/AMR.69-70.54
Citation
W. Zhang, J. H. Yao, "Research on Technics of Laser Direct Metal Deposition Forming Technology", Advanced Materials Research, Vols. 69-70, pp. 54-58, 2009
Online since
May 2009
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Price
$32.00
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