Forging method achieving uniformity of crystal particles of GH141 abnormally-shaped annular forged piece

Abstract

The invention discloses a forging method achieving the uniformity of crystal particles of a GH141 abnormally-shaped annular forged piece, and belongs to the technical field of forging technologies. According to the technical scheme, the forging method is characterized by comprising the following steps that S1, heating is conducted, specifically, a GH141 alloy bar is heated to enable the temperature to be 1100 DEG C, and heat preservation is conducted after heating is accomplished; S2, upsetting operation and punching operation are conducted, specifically, the GH141 alloy bar is subjected to upsetting operation, and then the GH141 alloy bar is subjected to punching operation, so that a forged blank is obtained; S3, heating is conducted for the second time, specifically, after the forged blank is heated to enable the temperature to be 1080 DEG C, heat preservation is conducted; S4, mandrel supporter hole enlarging operation is conducted, specifically, the forged blank is subjected to mandrel supporter hole enlarging operation; S5, heating is conducted for the third time, specifically, after the forged blank is heated to enable the temperature to be 1080 DEG C, heat preservation is conducted; S6, forging is conducted, specifically, the forged blank is put into a used blank membrane (2), and then a forming punch (1) is utilized to downwards press the forged blank so that the forgedblank can be forged and formed; and S7, cooling operation is conducted, specifically, air cooling operation is conducted. The forging method has the advantage that the degree of the uniformity of thecrystal particles of the GH141 abnormally-shaped annular forged piece is improved.

Description

technical field [0001] The invention relates to the technical field of forging technology, in particular to a forging method for homogenizing crystal grains of a GH141 special-shaped ring forging. Background technique [0002] GH141 alloy is a precipitation-hardening nickel-based deformation superalloy with high tensile and durable creep strength and good oxidation resistance in the range of 650-950 °C. Due to its excellent mechanical properties, GH141 alloy has been widely valued, and it is widely used in the field of aerospace. The aero-engine is a highly complex and precise thermal machine, and every important change in the history of human aviation is inseparable from the technical progress of the aero-engine. Currently used aero engines include turbojet / turbofan engines, turboshaft / turboprop engines, ramjet engines and piston engines, etc. No matter which aeroengine is due to its harsh working environment, the requirements for material properties more and more harsh. ...

AI Technical Summary

Problems solved by technology

[0003] At present, the cracking problem of GH141 is relatively serious in the forging process. The reason for the cracking is that the local deformation of GH141 alloy forgings, especially sp...

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