And a high-performance TC11 tube and its preparation method. The invention first uses grade 1 sponge titanium and adding aluminum vanadium alloy, aluminum molybdenum alloy and zirconium chips to prepare TC11 titanium alloy ingot by strictly controlling the batching and smelting process. The ingot is prepared by forging black skin bar billet, and then the extruded ingot billet is prepared by machining and surface grinding. After drilling, wrapping and heating, the billet was prepared by extrusion. After thermal straightening, surface treatment and heat treatment, the finished TC11 pipe was prepared by machining. TC11 titanium alloy pipe prepared by the invention 1) has high strength, plasticity and impact properties; 2) Pipe with higher tolerance level can be obtained; 3) Uniform and stable structure; 4) Excellent corrosion resistance; These features enable it to meet the high standards required by the petroleum industry.
At present, the oil industry widely used steel pipe for pipeline, due to the low strength and impact performance of steel pipe, therefore, in use process, due to overload and collision, easy to cause steel scrap or accident, at the same time, the service life of steel tube is very short, the use of steel pipe due to reasons such as corrosion, basic will not be able to use again after a year later, New steel pipes need to be replaced, thus increasing operating costs.
TC11 titanium alloy has the advantages of high specific strength, good impact performance, good corrosion resistance and so on. As an important aviation and aerospace material, it is widely used in compressor discs, blades, drums and other parts of aero-engines and aircraft structural parts. Because TC11 titanium alloy is a hot strong titanium alloy, its strength is high, deformation resistance is large, easy to crack in the process of processing, making it difficult to prepare pipe, microstructure and performance is difficult to control. Therefore, there are few materials about TC11 titanium alloy pipe production in the existing technology.
