Titanium alloy has excellent corrosion resistance, low density, good fatigue strength and crack propagation resistance, and has wide application prospects in aviation, aerospace, automotive, shipbuilding, energy, and other industries. Titanium's excellent corrosion resistance and good specific strength make titanium tubes thinner and better heat transfer products than other traditional metal pipe fittings.
TC4 titanium alloy is one of the most widely used titanium alloys at present. It has high strength and good corrosion resistance. However, it is difficult to see TC4 seamless titanium tubes in the seamless titanium tube market at home and abroad. TC4 titanium is mainly plate material, and TC4 pipes on the market are mainly high-strength thick-walled pipes produced by hot extrusion or oblique perforation. The main reason for this current situation is the high strength of TC4 titanium alloy and the difficulty of cold rolling. In order to solve the key technology of the cold rolling forming of TC4 seamless pipe, a series of researches have been carried out by the school and the enterprise. For example, the direct cold-rolled forming process is used to produce high-strength titanium alloy pipes, which not only greatly reduces production costs, but also meets the requirements for high-performance applications of titanium alloys.
The billet is opened with different deformation amounts, and the billet is rolled into a pipe with a total deformation of 70% through two passes and three passes. Vacuum annealing was performed at 800 ° C for 1 hour between passes, and the cooling method was that the furnace was cooled to 500 ° C and then air-cooled to room temperature, and the structure and property changes were observed. Concluded:
In the case of a small deformation amount, the wall thickness deviation is small, and the surface roughness is gradually reduced; when the large deformation amount is opened, the wall thickness deviation is large, which will affect the wall thickness deviation of the subsequent rolling. When the total amount of deformation is the same, the more rolling passes, the greater the elongation and hardness of the pipe, and the higher the strength.
The comprehensive performance is good. The material flow is large when rolling with large deformation, and the material flow is small when rolling with small deformation. Under the same heat treatment conditions and the subsequent rolling process, the large deformation The distortion of the tube structure obtained by the blanking is more serious. The small deformation amount has little effect on the anisotropy of the pipe; there is a certain fluctuation in the anisotropy of the mechanical properties in multi-pass rolling.
bend titanium pipe grade 1 titanium tube grade 1 titanium foil grade 5 titanium rod
TC4 titanium alloy is one of the most widely used titanium alloys at present. It has high strength and good corrosion resistance. However, it is difficult to see TC4 seamless titanium tubes in the seamless titanium tube market at home and abroad. TC4 titanium is mainly plate material, and TC4 pipes on the market are mainly high-strength thick-walled pipes produced by hot extrusion or oblique perforation. The main reason for this current situation is the high strength of TC4 titanium alloy and the difficulty of cold rolling. In order to solve the key technology of the cold rolling forming of TC4 seamless pipe, a series of researches have been carried out by the school and the enterprise. For example, the direct cold-rolled forming process is used to produce high-strength titanium alloy pipes, which not only greatly reduces production costs, but also meets the requirements for high-performance applications of titanium alloys.
The billet is opened with different deformation amounts, and the billet is rolled into a pipe with a total deformation of 70% through two passes and three passes. Vacuum annealing was performed at 800 ° C for 1 hour between passes, and the cooling method was that the furnace was cooled to 500 ° C and then air-cooled to room temperature, and the structure and property changes were observed. Concluded:
In the case of a small deformation amount, the wall thickness deviation is small, and the surface roughness is gradually reduced; when the large deformation amount is opened, the wall thickness deviation is large, which will affect the wall thickness deviation of the subsequent rolling. When the total amount of deformation is the same, the more rolling passes, the greater the elongation and hardness of the pipe, and the higher the strength.
The comprehensive performance is good. The material flow is large when rolling with large deformation, and the material flow is small when rolling with small deformation. Under the same heat treatment conditions and the subsequent rolling process, the large deformation The distortion of the tube structure obtained by the blanking is more serious. The small deformation amount has little effect on the anisotropy of the pipe; there is a certain fluctuation in the anisotropy of the mechanical properties in multi-pass rolling.
bend titanium pipe grade 1 titanium tube grade 1 titanium foil grade 5 titanium rod
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