Forging method for improving alpha-beta two-phase titanium alloy forging blank structure uniformity

Abstract

The invention discloses a forging method for improving alpha-beta two-phase titanium alloy forging blank structure uniformity. Based on a drawing-out forging process, before drawing-out forging is carried out, model selection of a swage block is firstly carried out, the swage block obtained by model selection is used for conducting homogenizing forging on a blank at the two-phase region temperature, and then the drawing-out forging process is carried out after the above operation is completed to obtain a forging blank finished product; and the forging heating temperature of the drawing-out forging process is below the phase transformation point temperature. According to the forging method, homogenizing forging at the two-phase region temperature is additionally carried out, the overall uniformity of the blank is effectively improved, and the purpose of improving the finished forging blank structure uniformity is achieved.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy processing, and relates to forging of titanium alloys, in particular to a forging method for improving the microstructure uniformity of α-β two-phase titanium alloy forging blanks. Background technique [0002] Titanium alloy has a series of characteristics such as low density, high specific strength, good corrosion resistance, excellent heat resistance, and non-magnetic, and has been widely used. For example, the titanium alloy consumption of the fourth-generation fighter F-22 in the United States accounts for 41%; the titanium alloy consumption of civil aviation aircraft Airbus A350XWB accounts for 15%. With the development of titanium alloy processing technology, large-scale overall frame and beam forgings with a projected area of ​​more than 2 square meters are becoming more and more common, making the size of titanium alloy forging billets larger and larger, especially the rear fuselag...

AI Technical Summary

Problems solved by technology

[0004] The first type: elongated forging process, which has the smallest amount of forging deformation, the least number of fires, the lowest cost, and the high yield of forged blanks, but the obtained forged blanks have uneven structures;

[0005] The second type: on the basis of the above-mentioned first type of process, the firing times of the upsetting and drawing forging method are increased. The amount of forging deformation in this type of process increases, and the uniformity of the forged billet obtained is higher than that of the first type. The cost increases and the yield of forged billets decreases;

[0006] The third type: on the basis of the above-mentioned second type of process, one or more cycles of forging above the temperature of the phase transition point and below the temperature of the phase transition point (or "high-low high-low forging") are added, which greatly increases the number of forging fires and deformation Quantity, the obtained forging billet structure is uniform, but the firing times and cost are the highest, and the yield of forging billet is the lowest

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