Rolling formation method of large and medium titanium alloy solid disc-shaped forge piece

Abstract

The invention discloses a rolling formation method of a large and medium titanium alloy solid disc-shaped forge piece , which comprises the following steps of: upsetting, compressing and punching a titanium alloy rod material into a solid disc blank; putting the disc blank into a rolling machine to roll; rolling the disc blank for 20s and axially rolling the hollow disc blank under an axial rolling force of 4000-4900KN at an axial feeding speed of 1.8mm / s to widen the hollow disc blank at a speed of 10-12mm / s; rolling the disc blank for 20-40s and axially rolling the hollow disc blank under an axial rolling force of 3000-3500KN at an axial feeding speed of 0.8mm / s to widen the hollow disc blank at a speed of 8-10mm / s; rolling the disc blank for 40-70s and axially rolling the solid disc blank under an axial rolling force of 2500-3000KN at an axial feeding speed of 0.5mm / s to widen the hollow disc blank at a speed of 5-8mm / s; and carrying out fire rolling to prepare the solid disc-shaped forge piece. The method is mainly used for rolling disc-shaped forge pieces with excellent shapes, sizes, textures and performances.

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 titanium alloy solid disk 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 this method is used to roll large and medium-sized stainless steel solid disc forgings, when...

AI Technical Summary

Problems solved by technology

When this method is used to roll large and medium-sized stainless steel solid disc forgings, when the upper tapered roll of the rolling mill moves towards the disc blank in the axial direction to roll the disc blank, if the feed speed is too high, the disc blank will be rolled. 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 increasing the 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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