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Roll bonding is a solid state, cold welding process, obtained through flat rolling of sheet metals. In roll bonding, two or more layers of different metals are passed through a pair of flat rollers under sufficient pressure to bond the layers. The pressure is high enough to deform the metals and reduce the combined thickness of the clad material. The mating surfaces must be previously prepared (scratched, cleaned, degreased) in order to increase their friction coefficient and remove any oxide layers. The process can be performed at room temperature or at warm conditions. In warm roll bonding, heat is applied to pre-heat the sheets just before rolling, in order to increase their ductility and improve the strength of the weld. The strength of the rolled bonds depends on the main process parameters, including the rolling conditions (entry temperature of the sheets, amount of thickness reduction, rolling speed, etc.), the pre-rolling treatment conditions (annealing temperature and time, surface preparation techniques, etc.) and the post-rolling heat treatments.
Self-riveting microstructure promotes metal composite plate rolling bonding method
ActiveCN121360777BSolve the problem of low bonding strengthHigh bonding strengthHard metalComposite plate
The present application relates to the technical field of metal composite plate preparation, and particularly relates to a self-riveting microstructure promoted metal composite plate rolling bonding method. The method is to preheat the stacked soft and hard metal plates, then roll and composite, and in the rolling process, the soft and hard metal plates are combined by self-riveting microstructure to realize mechanical riveting connection of the bonding surface, and form a composite plate; the composite plate is further promoted by heat treatment to realize metallurgical bonding of the bonding interface, and finally obtain a double connection interface of mechanical riveting and metallurgical bonding; the self-riveting microstructure includes a plurality of micro grooves arranged on the surface of the hard metal plate and a plurality of micro protrusions arranged on the surface of the soft metal plate, each column of micro protrusions is respectively inserted into each micro groove, and the micro groove is a necked structure, and in the rolling process, the micro protrusion is plastically deformed to fill and engage into the micro groove. The present application realizes the high-strength mechanical riveting and metallurgical bonding double-strengthened interface of the soft and hard metal composite plate, and significantly improves the comprehensive performance and reliability of the composite plate.
Owner:HARBIN INST OF TECH