| Steel-backed Cu-graphite bonding plate, composed of steel plate and Cu-graphite cladding, is an ideal bearing material. Copper matrix of Cu-graphite composite has good performances of strength, heat conductivity, wear resistance and embedability, while graphite has perfect lubricating property with a high service temperature of 400℃when exposed to air. For the wettability and diffusion between semisolid slurry and steel plate of steel-backed Cu-graphite bonding plate by using semisolid bonding are not very good, semisolid high-frequency vibration bonding was made use of to prepare steel-backed Cu-graphite bonding plate, and then interfacial bonding strength and interfacial structure of the clad plate was investigated. The main contents were described as follows:1. QTi3.5-3.5 graphite slurry with the solid fraction of 26% was prepared by using electromagnetic-mechanical stirring technique.2. Steel-backed Cu-graphite bonding plate with high bond strength was obtained by using semisolid high-frequency vibration bonding. The effect of vibration frequency on average thickness of interfacial diffusion zone and interfacial shear strength was investigated.3. Interfacial structure of steel-backed Cu-graphite bonding plate as well as semisolid high-frequency vibration bonding process was analyzed. Mechanism of the effect of high-frequency vibration on the bonding process was discussed.
|
PDF Full Text Request