Method for forging large-size integral titanium alloy frames

Abstract

The invention belongs to the technical field of forging, and relates to a method for forging large-size integral titanium alloy frames, which includes: the first step, designing a finish forge piece and an isothermal forging die according to materials, shapes and size of parts; the second step, designing a hammer pre-forging piece and a die drawing and keeping the size of a cavity of the pre-forging piece die and the size of a cavity of the isothermal forging die consistent; the third step, selecting pre-forging piece blank and making a finish forging die and a pre-forging die according to the first step and the second step; the fourth step, processing the blank by means of hammer pre-forging including coating protective lubricant, heating by an electric furnace, holding temperature, forging, subsequent process and the like; and the fifth step, processing the pre-forging piece by means of isothermal die-forging. The method realizes organic combination of hammer pre-forging and isothermal forging, so that the forging cycle is shortened and the heating number is reduced from 5-7 to 2 in isothermal forging.

Description

technical field [0001] The invention belongs to the field of forging and relates to a forging method of a large titanium alloy integral frame. Background technique [0002] Large titanium alloy forgings generally refer to forgings with a weight of more than 50kg and an outer diameter of 500mm. With the rapid development of science and technology, there are more and more demands for isothermal precision forgings of large or super large titanium alloy integral frames. Most of these forgings generally have structural characteristics such as high ribs, thin webs, and large projected areas. If the molding method of isothermal forging is directly adopted, it takes 5 to 7 fires to complete, and the burr must be milled after each fire, the production cycle is long (it takes 8 days to raise and cool the mold), and the isothermal forging cycle of 1 forging needs 12 days. days; this not only caused equipment and personnel consumption, but also reduced the service life of the mold. ...

AI Technical Summary

Problems solved by technology

If the molding method of isothermal forging is directly adopted, it takes 5 to 7 fires to complete, and the burr must be milled after each fire, the production cycle is long (it takes 8 days to raise and cool the mold), and the isothermal forging cycle of 1 forging needs 12 days. days; this not only caused equipment and personnel consumption, but also reduced the service life of the mold