METHOD FOR PREPARING TITANIUM-STEEL COMPOSITE PLATE

摘要

A method for preparing a titanium-steel composite plate. The titanium-steel composite plate with excellent bonding performance is prepared by means of blank preparation, surface treatment, separation agent coating, symmetric blanking, electron beam welding, heating, rolling, straightening, and plate cutting processes. A spacer (2) is added to an interface between the titanium and the steel by means of a blanking process, such that titanium and steel in a composite blank do not completely contact with each other, element interdiffusion is prevented during a heating process, and the formation of brittle phases such as carbides and intermetallic compounds on the interface is controlled. Subsequently, an interface oxide film is corrupted by means of large-reduction rolling, such that the formation of a new titanium-steel bonding interface and full metallurgical bonding are achieved. In addition, fast cooling after rolling is performed to suppress further formation of brittle phases, such that a titanium-steel composite plate with excellent bonding performance and no brittle phases is prepared. Compared with methods requiring additional nickel or copper foils as intermediate layers, the method has simpler steps, lower costs, and excellent bonding performance.