Roll forming method of large and medium-sized superalloy solid disc-shaped forgings

Abstract

The invention discloses a rolling forming method of a large and medium-sized high-temperature alloy solid disk-shaped forging. Firstly, the high-temperature alloy bar is upset and pressed into a solid disk blank, and then the disk blank is put into a rolling machine for rolling. Within 20s of rolling, the disk blank is widened at a speed of 9mm / s~11mm / s at an axial feed rate of 1.6mm / s and an axial rolling force of 4000~4900KN; within 20~40s of rolling, With an axial feed speed of 0.7mm / s and an axial rolling force of 3000-3500KN, the disk blank is widened at a speed of 7mm / s-9mm / s; The axial feed speed is 2500-3000KN under the axial rolling force of 2500-3000KN, so that the disk blank is widened at a speed of 4mm / s-7mm / s, and rolled into a solid disk-shaped forging. This method is mainly used for rolling disc-shaped forgings with excellent shape, size, structure and performance.

Description

technical field [0001] The invention relates to a rolling forming method of a forging, in particular to a rolling forming method of a large and medium-sized superalloy solid disc-shaped forging. Background technique [0002] Large and medium-sized solid disk forgings, such as compressor disks and turbine disks for heavy-duty ground gas turbines, require forgings to have excellent structure and performance due to the harsh working environment and complex stress. [0003] Chinese Invention Patent Specification CN1978125A published on June 13, 2007 discloses a rolling forming method for large and medium-sized solid disc-shaped forgings. After the solid disc is heated, it is installed in the machine for positioning and axially rolled into a solid disc-shaped forging. This method only solves the technical problem of rolling forming of large and medium-sized solid disc-shaped forgings. When using this method to roll large and medium-sized high-temperature alloy solid disc forgin...

AI Technical Summary

Problems solved by technology

When using this method to roll large and medium-sized high-temperature alloy solid disc forgings, when the upper tapered roller of the rolling mill moves axially towards the disc blank to roll the disc blank, if the feed speed is too high, it will cause the disc blank When the temperature rises during rolling, it is easy to cause defects such as overheating, overburning, and structural variation; if the feed rate is too small, it will cause the plate to dissipate heat too quickly during rolling, resulting in no rolling, or increased rolling time and rolling times, reduce rolling efficiency, and also cause defects such as insufficient filling of the peripheral part of the ring sharp corner near the outer ring surface of the disk forging

And when adopting this method to roll disc-shaped forgings, it is necessary to make the shape and size of disc-shaped forgings reach the requirements through repeated multi-turn rolling, which not only increases production costs, reduces productivity, but also repeatedly rolls for many times. Process and quality control add difficulty

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