Rolling and forming method for iron-based high-temperature alloy thick-walled ring forging

Abstract

The invention discloses a rolling and forming method for an iron-based high-temperature alloy thick-walled ring forging. The rolling and forming method comprises the following steps: designing an intermediate blank into a special-shaped ring blank, wherein a boss is formed at the position, close to the inner wall, of the special-shaped ring blank; calculating each size of the special-shaped ring blank according to an equivolumetric principle; designing a special mould according to the shapes and the sizes of the special-shaped ring blank; heating an iron-based high-temperature alloy rod to a deforming temperature, performing upsetting, punching and pre-rolling, and preparing the special-shaped ring blank under the action of the special mould; reheating the special-shaped ring blank to the deforming temperature, and preparing the special-shaped ring blank into a thick-walled ring forging by matching suitable rolling parameters. According to the method, the defects of grooving and folding caused during a rolling process of the thick-walled ring forging can be effectively overcome; the rolling quality of the thick-walled ring forging can be improved. The method is used for the rolling and forming of the thick-walled 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 iron-based superalloy 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 heig...

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

Images