GR12 Titanium Clad Steel Plate For Pressure

The performance difference between titanium and steel is large. The thermal conductivity of titanium is only 1/6 of that of steel, and the elastic modulus is only 1/2 of that of steel. As the main manufacturing process of titanium-steel composite plate, explosive welding composite technology has its shortcomings and limitations increasingly apparent. Many scholars at home and abroad have carried out a lot of theoretical and experimental research on the manufacturing process of titanium-steel composite plate, and put forward explosive+rolling composite technology on the basis of explosive welding, which has been well applied. As a new metal material composite technology, vacuum rolling composite technology is also increasingly used in actual production. The research status of explosive welding, explosive+rolling and vacuum rolling are different, and there are advantages and disadvantages. Summarize the theoretical research and practical experience of relevant aspects at home and abroad, and get their respective technical characteristics, which is of great significance to the standardized production of GR12 Titanium Clad Steel Plate for Pressure.

At present, explosive welding composite technology is the most important manufacturing process for producing titanium steel composite plates at home and abroad. Its principle is to use the huge energy generated by explosive detonation to complete the solid/solid metallurgical combination of the same or different metal composites in a flash. It has the advantages of simple process and low cost, and the wavy bonding at the interface increases the bonding area between the base metals, which greatly improves the bonding strength of the composite. Figure 1 (a) shows the current parallel explosive welding method at home and abroad. In this method, the energy generated by explosives is only used downward, and the energy utilization rate is low. Figure 1 (b) shows that the new dual-vertical explosive welding method can save about 2/3 of explosives and improve the welding efficiency compared with the traditional parallel welding method.

 

The research on the wave forming mechanism at the interface of explosive welding clad plate is the key and difficult point in the theory of explosive welding, and also a hot field for scholars at home and abroad. It mainly includes the engraving mechanism, instability mechanism, Karman vortex street mechanism, stress wave mechanism, metal physics mechanism, etc ω-。 The research on the mechanism of explosive welding wave bonding is the premise to improve the bonding strength of composite plates, and any mechanism is closely related to the process parameters of explosive welding. Reasonable selection of explosive welding process parameters will change the size of the waveform, thus changing the bonding strength, mechanical properties and other quality characteristics of the composite plate.

The process parameters of explosive welding include the material performance parameters of metal substrate and explosive, static parameters such as charge quantity and clearance between plates, and dynamic parameters such as detonation velocity and impact angle. Among them, the static installation parameters play a decisive role in the performance of composite materials, namely charge quantity and clearance between plates. Too much charge will lead to over-melting of the interface, while too small charge will reduce the composite rate of the two plates; If the gap between plates is too small, it will be difficult to exhaust gas and produce many defects during welding. If the gap is too large, it may miss the stable detonation stage of the explosive and cause welding failure.