Study on weld seam surface deposits of CuSi3 CMT brazing

Study on weld seam surface deposits of CuSi3 CMT brazing CuSi3 CMT brazing is an advanced welding technology widely used in automotive industry. But dark deposits defect was found on the weld seam surface. SEM and EDS analyses were operated in this paper and this surface was found to contain three areas: area A with silicates thin film and Cu, area B with MnO·SiO2 silicates, and area C with CuO. And thus the formation mechanism of surface deposits, which was mainly attributed to the generation and uneven distribution of large amount of dark CuO, was proposed. Based on the mechanism of the deposit formation, four methods were processed to suppress the surface dark deposits. Ar + 2%O2 would prevent the generation of dark deposits because of enhanced cathode crushing effect. Besides, delay gas protection time, keep torch travel angle positive, and maintain a low heat input would be benefit for suppressing dark deposits on the weld seam surface. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The International Journal of Advanced Manufacturing Technology Springer Journals

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Publisher
Springer London
Copyright
Copyright © 2017 by Springer-Verlag London
Subject
Engineering; Industrial and Production Engineering; Media Management; Mechanical Engineering; Computer-Aided Engineering (CAD, CAE) and Design
ISSN
0268-3768
eISSN
1433-3015
D.O.I.
10.1007/s00170-017-0349-3
Publisher site
See Article on Publisher Site

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