Paper Title:
Technical Study of Exhaust Valve Overlaying Based on Micro-Plasma Arc Welding
  Abstract

The micro-plasma arc welding technology(MPAW) was used to remanufacture the exhaust valve of W615 engine. The ST6 Co alloy powder was selected as overlaying material, the processing parameters of overlaying was optimized considering the geometry demand of deposited layer, and the current downslope method was adopted to weaken the arc crater. The microstructure characteristics and the micro-hardness of the weld were investigated, no defects were found in the deposited layer or at the interface, and the heat-affected zone among joint was not evident. The maximum hardness situated at the top layer being 657.8HV, with a slight decrease towards the bottom layer and fusion zone.

  Info
Periodical
Key Engineering Materials (Volumes 373-374)
Main Theme
Edited by
M.K. Lei, X.P. Zhu, K.W. Xu and B.S. Xu
Pages
330-333
DOI
10.4028/www.scientific.net/KEM.373-374.330
Citation
Y. H. Xiang, B. S. Xu, Y. H. Lv, D. Xia, "Technical Study of Exhaust Valve Overlaying Based on Micro-Plasma Arc Welding", Key Engineering Materials, Vols. 373-374, pp. 330-333, 2008
Online since
March 2008
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Price
$35.00
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