Effect of Brazing Temperature on the Microstructure and Property of Vacuum Brazed WC-Co and Carbon Steel Joint
The effect of brazing temperature on the properties of brazed joints between WC-Co hard alloy and SAE1045 carbon steel using Cu and ASTM C52100 bronze metal as insert fillers were investigated. A vacuum brazing furnace was employed to conduct the experiment with different sets of operational parameters (brazing temperature, bonding time and filler) were used. The experimental result shows that Fe-Co-Cu alloy layer was formed at the WC-Co/Cu filler interface. With increased brazing temperature and bonding time, the thickness of the Fe-Co-Cu layer increases. From the shear test, the maximum shear strength is 320±10 MPa for the joint brazed at 1140°C for 15 min using Cu filler. The shear strength of WC-Co/C52100/SAE1045 brazed joints was better than WC-Co/Cu/SAE1045 brazed joints. The increase of bonding time of WC-Co/C52100/SAE1045 joints improved the shear strength slightly.
Alan K.T. Lau, J. Lu, Vijay K. Varadan, F.K. Chang, J.P. Tu and P.M. Lam
L. H. Chiu et al., "Effect of Brazing Temperature on the Microstructure and Property of Vacuum Brazed WC-Co and Carbon Steel Joint", Advanced Materials Research, Vols. 47-50, pp. 682-685, 2008