Titanium alloy blade forging method

Abstract

The invention belongs to the technical field of titanium alloy blade forging and discloses a titanium alloy blade forging method. The titanium alloy blade forging method includes the following steps that the machining allowance of a corresponding forged piece is determined according to part drawings and technical design parameters of a titanium alloy blade; a corresponding hot forging drawing is designed. The twist angle of the titanium alloy blade is determined according to the hot forging drawing and the following formula of theta=(alpha1+alpha2)/2, wherein the alpha1 is the included angle between a profile chord length line of a tip of the titanium alloy blade and the chord direction of the titanium alloy blade, and the alpha2 is the included angle between the profile chord length line of a root of the titanium alloy blade and the chord direction of the titanium alloy blade. A finish forging die is made according to the hot forging drawing and the twist angle of the titanium alloy blade. A forged-piece rough profile is designed according to the hot forging drawing, and a tire mold is made according to the size and shape of the designed forged-piece rough profile. A blank is subjected to on-hammer rough profile forging through a free forging hammer to form the forged-piece rough profile; then, the forged-piece rough profile is subjected to on-hammer die forging through the finish forging die.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy blade forging, and in particular relates to a method for forging a titanium alloy blade. Background technique [0002] Titanium alloy blades are more difficult to prepare in the process of barren type and die forging. The specific performances are as follows. First, if the heating temperature and holding time are not appropriate, it is easy to cause the surface of the material to become brittle and form micro-cracks, which will make the material The thermal stability is reduced; second, the friction coefficient of titanium alloy material is large, relatively sticky, and the metal fluidity is not good, especially the large titanium alloy blades are not easy to be filled in multiple parts and difficult to form; third, thermal effects are prone to occur during the forging process, Lead to the generation of defects such as bright lines in forgings. Contents of the invention [0003] The purp...

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Problems solved by technology

[0002] Titanium alloy blades are more difficult to prepare in the process of barren type and die forging. The specific performance is as follows. First, if the heating temperature and holding time are not appropriate, the surface of the material will easily become brittle and form micro-cracks, which will make the material The thermal stability decreases; second, the friction coefficient of titanium alloy material is large, relatively sticky, and the metal fluidity is not good, especially the large titanium alloy blades are not easy to be filled in multiple parts, and forming is difficult; third, thermal effects are prone to occur during the forging process, Lead to the generation of defects such as bright lines in forgings