Paper Title:
Diffusion Welding of WC-Co (Hardmetal)/ High Strength Steels
  Abstract

The present work shows the microstructural and mechanical results obtained in joints WC-Co / steel 90MnCrV8 (high strength steel). The joints were carried out using diffusion welding processes and soft interlayers Cu-Ni. The binary Cu-Ni alloys were obtained by electrochemical deposition techniques. The microstructural and mechanical changes provoked in the steel, due to heat treatments, were studied in order to know plastic deformation during the joints. The diffusion welds were obtained in an Edwards vacuum furnace (10-3 - 10-4 Pa), three welding temperatures were used, (825 °C, 850 °C and 875 °C) and 30, 45 and 60 minutes, as welding times. The constant pressure was 5 MPa. The welding interface microstructure was studied by scanning electron microscopy (SEM-EDX). In order to determine the mechanical behaviour of all joints were carried out shear tests. The optimum results were obtained at 850 °C / 45 min and 850 °C / 60 min. Nevertheless, the diffusion welding conditions allowed attaining high quality welding interfaces in all joints of WC-Co / 90MnCrV8

  Info
Periodical
Materials Science Forum (Volumes 514-516)
Edited by
Paula Maria Vilarinho
Pages
1526-1530
DOI
10.4028/www.scientific.net/MSF.514-516.1526
Citation
J. M. Gómez de Salazar, M. I. Barrena, N. Merino, L. Matesanz, "Diffusion Welding of WC-Co (Hardmetal)/ High Strength Steels", Materials Science Forum, Vols. 514-516, pp. 1526-1530, 2006
Online since
May 2006
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Price
$32.00
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