Titanium alloy serrated flat wire preparation method, first put titanium alloy round wire into a vacuum furnace, heating to 650℃-900℃, heat 1-2 hours, cooling with the furnace; The titanium alloy round wire was removed from the vacuum furnace for alkali and pickling, and then the quality defects found on the surface of the titanium alloy round wire were polished. Then put into the electric furnace heating, the temperature is maintained at 600℃-1100℃; The heated titanium alloy round wire was put into the rolling mill for rolling semi-finished flat wire. The semi-finished flat wire is re-heated in the electric furnace, and the temperature is still maintained at 600℃-1100℃; After the second heating, the semi-finished flat wire is rolled into the rolling mill again. After straightening, the finished flat wire is put into the die to draw the finished flat wire with serrated edges on both sides. The process of the invention is simple and easy, the finished serrated flat wire has the advantages of corrosion resistance, high strength, light weight and low cost, and can be used for screws and nuts of high-grade mobile phones, and has high practical value.
1) Take TA7 titanium alloy round wire with a diameter of 3mm;
2) Put the titanium alloy round wire into the vacuum furnace, vacuum the furnace to reach 1.5×10-3-1.5×10-4Pa, heat to 900℃, hold for 2 hours, and cool with the furnace;
3) Take the titanium alloy round wire out of the vacuum furnace, soak it in alkali solution for 5 minutes, and wash it after taking it out; Then soak in acid solution for 15 minutes, remove and wash with water; The titanium alloy wire is immersed in sodium hydride in a molten state, that is, sodium hydride is heated to 450℃-550℃ to a molten state; The acid solution is nitric acid, hydrofluoric acid and water with a weight percentage of 40-50%, 3-10% and 40-60%.
4) The quality defects found on the surface of titanium alloy round wire after alkali and pickling are polished;
5) Put the polished titanium alloy round wire into the electric furnace to heat, and keep the temperature at 1100℃;
6) Put the heated titanium alloy round wire into the rolling mill to roll the semi-finished flat wire with a thickness of 2.5mm and a width of 3.5mm;
7) Put the semi-finished flat wire back into the electric furnace for heating, and the temperature is still maintained at 1100℃;
8) After the second heating of the semi-finished flat wire into the rolling mill online again to roll 2.2mm thick, 4.2mm wide finished flat wire; If the rolled flat wire does not meet the finished product requirements, repeat steps 7) and 8) until a qualified finished flat wire is obtained.
