Due to the characteristics of lightweight, high specific strength and excellent corrosion resistance, titanium and its alloys are widely used in petrochemical and aerospace fields such as various pressure vessels and heat exchangers, but titanium is expensive. The high cost of use restricts its application range. Titanium-steel clad plate has the dual advantages of performance and cost. While not affecting the corrosion resistance and other characteristics of titanium, it greatly reduces the consumption of rare metals and has excellent mechanical properties of steel. Therefore, titanium-steel clad plate There is a tendency to gradually replace titanium alloys in applications in various fields.
The performance gap between titanium and steel is large. The thermal conductivity of titanium is only 1/6 of that of steel, and the modulus of elasticity is only 1/2 of that of steel. This creates a great obstacle to the compounding of titanium and steel. Explosive welding composite technology is the main manufacturing process of titanium steel clad plate, its shortcomings and limitations are becoming 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 clad plate, and on the basis of explosive welding Proposed explosion + rolling composite technology, has been better applied. As a new type of metal material composite technology, the vacuum rolling composite technology is also increasingly used in actual production.
The research status of the three manufacturing processes of explosive welding, explosion + rolling and vacuum rolling is different, and there are advantages and disadvantages.
1. Explosive welding composite technology
At present, explosive welding composite technology is the most important manufacturing process for producing titanium steel composite plates at home and abroad. The principle is to use the huge energy generated by the detonation of explosives to complete the solid/solid phase metallurgical combination of the same or dissimilar metal composite materials in an instant. The advantages are that the process is simple, the cost is low, and the wavy bonding at the interface increases the bonding area between the matrix metals, which greatly improves the bonding strength of the composite material.
2. Explosion + rolling composite technology
The explosion + rolling method is to carry out subsequent rolling treatment on the explosive composite material. Firstly, a smaller and thicker composite material is produced by explosive welding technology, and then processed into a larger and thinner composite material by rolling treatment, that is, compared with the simple explosive welding composite technology, it can break through its material Due to the limitation of manufacturing size, the comprehensive technical advantages of explosive welding and rolling technology are fully utilized, and the surface roughness, shape accuracy, thickness dimensional accuracy and machinability of composite materials are significantly improved.
3. Vacuum rolling composite technology
Explosive welding and explosive + rolling processes are relatively perfect, but there are still shortcomings such as low production efficiency and yield, and serious environmental pollution. At present, the vacuum rolling composite method, as a new type of clad plate welding technology, is increasingly used in the production of titanium-steel clad plates. This method can greatly improve production efficiency and yield, and reduce environmental pollution. More importantly, it can prevent metal oxides or nitrides from appearing at the interface during heating and rolling, thereby greatly improving the bonding strength of the clad plate.
From the above it can be concluded
(1) Explosive welding, explosive + rolling, and vacuum rolling have their own characteristics and scope of application. Combining these three manufacturing processes can optimize the manufacturing process of titanium-steel composite materials and promote standardized production.
(2) Explosive welding is a relatively mature titanium-steel clad plate manufacturing process, which is mainly used to manufacture clad plates with a thickness greater than 2mm and a length less than 4m, so it is suitable for high-pressure and ultra-high pressure vessels.
(3) The composite technology of explosion + rolling can produce large-area ultra-thin materials, breaking through the limitations of explosive welding; the combination of the double-vertical explosive welding method and the principle of window lower limit can reduce 2/3 of explosives At the same time, it produces microwave or wavelet combination, which ensures the feasibility of subsequent rolling. The performance of titanium steel explosion + rolled clad plate has been reduced, which is suitable for medium and high-pressure vessels.
Baoji Taicheng Clad Metal Materials Co., Ltd is a professional metal composite plates manufacturer. The company has 2 complete production lines. We can provide customized titanium steel composite plates and high-quality services for buyers. Welcome to consult and cooperate!
