There are many kinds of process methods for metal composite plates, and each preparation method has its own advantages. However, none of the existing reports can replace other methods. Therefore, in a certain period of time, it is still the coexistence of various preparation methods.
1. The direct rolling composite method is one of the main methods for producing metal plates. For hot rolling, problems need to be solved, such as complex process, long processing cycle and oxidation of joint interface; For cold rolling, the problems to be solved are difficult to control plate shape, edge crack of rolled piece, large first pass reduction and transverse fracture and deformation instability of metal when the deformation resistance is large; After more than 30 years of asynchronous rolling. A large number of scientific research achievements have been achieved in the development of, which is a relatively competitive process method, but the problems of practical application should be solved as soon as possible; The vacuum rolling composite method needs to overcome the problems of obtaining and changing the vacuum degree, designing the gas atmosphere, and obtaining and maintaining the activated surface.
2. Explosive billet making - rolling composite method is also one of the main methods to produce metal composite plates at present. Because it obtains the blank through the explosive compound method, it has the disadvantages of the explosive method, that is, the selection of the blasting site, the treatment of noise, and the low production and productivity.
3. The porosity of metal composite plate obtained by sintering method is large, so this method can only be used to prepare composite metal materials with high porosity, and the scope of application is very narrow. In addition, this method has complex complex complex processes and high energy consumption.
4. During the production of composite plate by cast-rolling composite method, due to the high composite temperature, the surface of composite substrate is easy to oxidize and form oxide layer; At the same time, due to the different melting points of the clad metal and the base metal, the joint part is easy to produce melting loss, so it is difficult to obtain high-quality clad steel plate. In order to avoid being melted by molten steel, the plate thickness and weight are also limited.
5. It is difficult to prepare metal clad plates by reverse solidification method, and the yield is low, and the dimensional accuracy of its products is also difficult to control.
6. The process of producing composite plates by electromagnetic continuous casting is still in the research stage. However, like the reverse solidification method, they have strong competitiveness in the field of future research due to their advantages of good interfacial bonding strength, high efficiency, low consumption and environmental protection. Because it is a combination of liquid and liquid, it is difficult to control the thickness of the composite plate, and the structure and properties of the composite plate are also relatively poor compared with the rolling method.