Method for rolling and forming alpha-phase titanium alloy thick-wall ring forging

Abstract

The invention discloses a method for rolling and forming alpha-phase titanium alloy thick-wall ring forging. The method for rolling and forming alpha-phase titanium alloy thick-wall ring forging comprises the following steps of: designing an intermediate blank to be a special ring blank provided with a lug boss close to an inner wall; calculating respective dimensions of the special ring blank according to an equivolumetric principle; designing a specific mould according to shape and dimensions of the special ring blank; preparing the special ring blank from an alpha-phase titanium alloy rod by using a specific mould after the alpha-phase titanium alloy rod is heated until the alpha-phase titanium alloy rod is heated at a temperature which can cause a deformation and is subject to upsetting, punching and pre-rolling; and reheating the special ring blank until reheating the special ring blank at the temperature which can cause a deformation, and rolling the special ring blank into the thick-wall ring forging matched with appropriate rolling parameters. According to the method for rolling and forming the alpha-phase titanium alloy thick-wall ring forging provided by the invention, defects such as recesses and folds arisen during the rolling of the thick-wall ring forging can be overcome efficiently, and rolling quality of the thick-wall ring forging can be improved. The method is used for rolling and forming the thick-wall ring forging.

Description

technical field [0001] The invention relates to a rolling forming method of a ring forging, in particular to a rolling forming method of an α-phase titanium alloy thick-walled ring forging. Background technique [0002] The rolling forming of the ring refers to the plastic forming method in which the wall thickness is reduced and the inner and outer diameters are increased under the action of the rolling force of the main roll and the core roll. When this forming method produces thick-walled ring forgings, the flow velocity of the metal material near the inner and outer walls of the ring is higher than that of the metal material in the middle part, and the greater the wall thickness, the greater the difference between the two , if a rectangular ring blank is used for rolling forming, grooves will appear on the upper end surface of the formed thick-walled ring forging, that is, the height of the part near the outer wall and the part near the inner wall is greater than the hei...

AI Technical Summary

Problems solved by technology

The first method will destroy the metal flow line on the end face of the forging, reduce the strength of the ring, and waste materials

Although the second method suppresses the height increase on both sides of the inner wall and the outer wall, it is easy to cause excessive metal materials to flow to the upper ends of the inner wall and the outer wall, where they accumulate and form folds; and if the pressing speed of the cone roller is too high Fast, it will also cause a serious temperature rise on the end face of the forging, which will seriously affect the quality of the forging

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