Journal of Northeastern University Natural Science ›› 2020, Vol. 41 ›› Issue (3): 374-379.DOI: 10.12068/j.issn.1005-3026.2020.03.013

• Mechanical Engineering • Previous Articles     Next Articles

Study on the Process and Performance of Variable Thickness Cladding Layer Deposition

XIN Bo, ZHOU Xian-xin, GONG Ya-dong   

  1. School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, China.
  • Received:2019-04-26 Revised:2019-04-26 Online:2020-03-15 Published:2020-04-10
  • Contact: XIN Bo
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Abstract: In order to reduce the step-effect caused by uniform thickness cladding layers, the variable scanning speed and height-varying overlapping methods were proposed to form variable thickness cladding layers. Based on the raster scanning path, the geometric model with variable thickness slices was established. The surface quality, hardness and microstructure distribution of the ramp cuboids were observed, compared with uniform thickness cladding layer deposition. The results showed that the process of variable thickness cladding layers can dramatically improve geometric precision. The variation of grain growth direction at the longitudinal section of the formed samples is revealed. Moreover, in the scanning and overlapping direction, the maximum hardness value appears near the high end.

Key words: variable thickness cladding layer, scanning speed, geometric precision, grain growth direction, Vickers hardness

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