Processing method of refining grains of biphasic titanium alloy bar
A technology of grain refinement and processing method, applied in the field of grain refinement of two-phase titanium alloy bars, can solve the problems of increased cost, high effect, inconspicuousness, etc. The effect of uniform grain refinement
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Embodiment 1
[0016] For Warp TC4 Blank After rolling, the dimension after rolling is The rolling deformation is 98.22%, and then The TC4 rolling is drawn, and the size after drawing is The amount of drawing deformation is 17.87%, and the ratio of rolling and drawing deformation is 5.5:1; the phase transition point of TC4 billet is determined to be 972°C, the drawing temperature is set to 800°C, and the drawing speed is 4m / min. Pass drawing, respectively The single-pass drawing deformations are 6.15%, 6.35%, and 6.55%, respectively. Through the observation of the rod structure after drawing, the microstructure is a fine equiaxed structure with a grain size of 2-5 μm, specifically as follows figure 1 shown.
Embodiment 2
[0018] Pair warp TC20 billet After rolling, the dimension after rolling is The rolling deformation is 97.22%, and then The TC20 rolling is drawn, and the size after drawing is The drawing deformation is 19%, and the ratio of rolling and drawing deformation is 5.1:1; the phase transition point of TC20 billet is determined to be 1029°C, the drawing temperature is set to 880°C, and the drawing speed is 4m / min. Pass drawing, respectively The single-pass drawing deformations were 4.94%, 5.06%, and 5.19%, respectively. Through the observation of the rod structure after drawing, the microstructure is a fine equiaxed structure with a grain size of 5-8 μm, specifically as follows figure 2 shown.
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