Rolling formation method of large and medium stainless steel hollow disc-shaped forge piece

Abstract

The invention discloses a rolling formation method of a large and medium stainless steel hollow disc-shaped forge piece , which comprises the following steps of: upsetting, compressing and punching a stainless steel rod material into a hollow disc blank; putting the disc blank into a rolling machine to roll; rolling the disc blank for 20s to enable the disc blank to widen at a speed of 10-15mm / s under 4000-4900KN of an axial rolling force at an axial feeding speed of 2mm / s; rolling the disc blank for 20-40s to enable the disc blank to widen at a speed of 8-12mm / s under 3000-3500KN of an axial rolling force and 3000-4000KN of a radial rolling force at an axial feeding speed of 1mm / s; rolling the disc blank for 40-60s to enable the disc blank to widen at a speed of 5-8mm / s under 2500-3000KN of an axial rolling force and 2000-3000KN of a radial rolling force at an axial feeding speed of 0.5mm / s; and carrying out fire rolling to prepare the hollow 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 forgings, in particular to a rolling forming method of large and medium-sized stainless steel hollow disk forgings. Background technique [0002] Large and medium-sized hollow 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] The Chinese invention patent specification CN101020282A published on August 22, 2007 discloses a rolling forming method for large and medium-sized hollow disc-shaped forgings. Hollow disc blanks are formed, and the hollow disc blanks are heated and then installed, positioned, axially rolled and radially-axially rolled to form hollow disc-shaped forgings. This method only solves the technical problem of rolling forming of large and medium-sized hollow disk-shaped forgings. When this method is used to roll larg...

AI Technical Summary

Problems solved by technology

When this method is used to roll large and medium-sized stainless steel hollow 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, 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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