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

A homogenization and special-shaped ring technology, which is applied in the field of forging technology, can solve the problems of unsatisfactory grain size and large grain size difference, and achieve the effects of improving mixed crystal defects, optimizing heat treatment temperature, and shortening production cycle

Inactive Publication Date: 2020-09-15
WUXI PAIKE HEAVY CASTING & FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 special-shaped forgings, is uneven during the forging process, resulting in extremely large grain size differences and coarse grains that cannot meet the relevant acceptance criteria. asked questions

Method used

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

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Experimental program
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Effect test

Embodiment

[0029] Embodiment: a kind of forging method of grain uniformity of GH141 special-shaped ring forging, such as figure 1 shown, including the following steps:

[0030] S1, heating: prepare as figure 2 The GH141 alloy bar is shown, the size of the GH141 alloy bar is φ200mm+2mm×424mm+5mm, the GH141 alloy bar is heated to 1100°C, and the heat preservation time is 160min after the heating is completed.

[0031] S2, upsetting and punching: first, the GH141 alloy bar is upset, and then punched in the GH141 alloy bar to obtain a forged billet (such as image 3 shown), the size is φ315mm±5mm×175mm±5mm, and the diameter of the inner hole of the forging billet is 140mm±5mm.

[0032] S3. Secondary heating: heat the forging billet to 1080° C., and then keep it warm for 105 minutes.

[0033] S4, horse frame reaming: carry out horse frame reaming to the forging billet (such as Figure 4 shown), the size of the forged blank horse frame after reaming is φ335mm±5mm×φ220mm±5mm×175mm±5mm.

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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. ...

Claims

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Application Information

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IPC IPC(8): B21K1/76B21J1/06B21J5/00B21J5/02B21J5/08
CPCB21J1/06B21J5/002B21J5/02B21J5/08B21K1/761
Inventor 连忠礼刘峰刘智刘其源陈翠王骏许志成吴玉超
Owner WUXI PAIKE HEAVY CASTING & FORGING
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