Aerospace Aircraft BT20 Titanium Alloy Profiles

As a medium-strength titanium alloy, BT20 titanium alloy is an alpha-beta titanium alloy with a nominal composition of Ti-6Al-2Zr-1Mo-1V. BT20 titanium alloy profiles for aircraft can be categorized by cross-sectional shape into right-angle, sharp-angle, obtuse-angle, Z-shaped, U-shaped, T-shaped, etc. The main strengthening mechanism is solid solution strengthening by Al element, while the addition of neutral element Zr improves processability. Precision rolling technology has gradually become one of the common processing methods for titanium alloy profiles. This production technology not only improves production efficiency but also enhances the quality of profile products. Producing titanium alloy profiles using precision rolling technology has more advantages compared to traditional extrusion, such as higher production efficiency, lower required costs, and rolled profiles that can meet the high standards and requirements in fields like aerospace.
 

The room temperature and high-temperature tensile mechanical properties of BT20 titanium alloy profiles for aircraft are shown in Table 1.

The BT20 titanium alloy profiles for aerospace aircraft have the excellent properties of α-type titanium alloys while also possessing the advantages of α+β titanium alloys, such as maintaining high strength in medium and high-temperature environments, as well as having good thermal stability and weldability. Therefore, BT20 titanium alloy can serve as a raw material for key components in the aerospace field. Titanium alloy profiles are mainly used in the fuselage parts of aircraft for beams and frames, which can significantly enhance aircraft strength, reduce the aircraft's own weight, and thus increase its payload capacity. Currently, there is an increasing demand for titanium alloy profiles from civil aircraft, large transport aircraft, and military aircraft.
 

Process flow: (1) Die design: Design of rolling mill dies, allocation of deformation in each pass; (2) Die system simulation and optimization: Simulation analysis of the continuous rolling process to verify the rationality of the designed die system; (3) Heating: Resistance furnace heating, with heating temperature about 30℃ below the phase transformation point; (4) Profile rolling: Multi-roll mill, multi-pass rolling; (5) Heat treatment: Atmospheric heat treatment above the recrystallization temperature; (6) Straightening: Straightening of the profile at a certain temperature to meet straightness standards and customer requirements; (7) Surface treatment: Alkali-acid pickling or sandblasting; (8) Sampling: Testing chemical composition and room-temperature tensile properties; (9) Inspection: Measuring product dimensions, visually checking appearance quality, ensuring uniform color without cracks, folds, or scratches, ensuring dimensional tolerance meets standard requirements, with profile physical picture; (10) Packaging: Packaged in custom sturdy wooden crates to prevent damage during transportation; (11) Shipping: Delivery by land or air.

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