Preparation method of TC4 titanium forging stock

Abstract

The invention discloses a preparation method of a TC4 titanium forging stock. 0-grade titanium sponge is selected. The preparation method specifically comprises the following steps: step 1, selectingsmelting equipment for machining, wherein the equipment adopts a vacuum consumable electric arc furnace, and an integral electrode or a tailor-welded electrode is adopted in an electrode preparation mode; step 2, carrying out smelting, wherein the smelting frequency is not less than two; and step 3, casting an ingot, carrying out flaw detection to determine the position of a shrinkage cavity and carrying out sawing, and after the cast ingot is peeled, carrying out ultrasonic flaw detection according to an AMS2631 B-grade standard to detect whether defects such as inclusions and air holes existin the cast ingot or not. According to the preparation method, the forging and smelting frequency is increased, so that in the early stage of production, the forging basis of the TC4 titanium forgingstock is improved, and the circumstance that the hardness is low in the later stage is avoided; meanwhile, in the later detection, detection is carried out through different detection samples at different positions, so that the detection effect is more accurate; and during supply, the overall quality of the TC4 titanium forging stock is higher through treatment of an annealing process again.

Description

technical field [0001] The invention belongs to the technical field of TC4 titanium forging blanks, and in particular relates to a preparation method of TC4 titanium forging blanks. Background technique [0002] The composition of titanium alloy TC4 material is Ti-6Al-4V, which belongs to (α+β) type titanium alloy and has good comprehensive mechanical and mechanical properties. Greater than strength. The strength sb=1.012GPa of TC4, the density g=4.51g / cm3, the specific strength sb / g=23.5, while the specific strength sb / g of alloy steel is less than 18. Titanium alloys have low thermal conductivity. The thermal conductivity of titanium alloy is 1 / 5 of that of iron and 1 / 10 of that of aluminum, and the thermal conductivity of TC4 is l=7.955W / m·K. [0003] In the production of the existing TC4 titanium forging billet, it is generally smelted and forged once, which leads to the phenomenon that the hardness is low and the quality cannot meet the standard after the later produ...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of preparation method of TC4 titanium forging billet, in order to solve the existing TC4 titanium forging billet proposed in the above-mentioned background technology in the production, generally through single smelting and forging, cause after the late production , it is easy to have low hardness and the phenomenon that the quality cannot meet the standard. At the same time, the existing TC4 titanium forging blanks have inaccurate detection values ​​in the post-production detection, and the performance fluctuations in the later use are relatively large.