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A kind of forging method of special-shaped ring of alloy material for aviation

A technology of alloy materials and special-shaped rings, which is applied in the field of metal forging, can solve the problems of sudden change in grain size, accelerated oxidation of coarse grains, and short ring forging time, so as to achieve uniform and fine grain size, slow down the growth tendency, and fine grain size. and even effect

Active Publication Date: 2016-03-30
豪梅特航空机件(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (1) Limited by the transfer time, preheating temperature, etc., the ring forging time is short and the rolling deformation resistance is large
[0008] (2) The dimensional control accuracy of the existing ring rolling technology is not high, and the subsequent shaping machine must be used to correct the size. However, the uneven deformation of the special-shaped shaping process leads to local critical deformation, which leads to local mutations in the grain size during the high-temperature solution treatment process , to get coarse tissue
However, if the internal grain size of this ring forging is large, it will work under high temperature, oxidation and pressure, especially when the aircraft is working in a harsh environment at high altitude, the coarse grains inside the ring forging will undergo accelerated oxidation, eventually leading to cracks, become the source of cracks, and thus pose a danger

Method used

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  • A kind of forging method of special-shaped ring of alloy material for aviation
  • A kind of forging method of special-shaped ring of alloy material for aviation
  • A kind of forging method of special-shaped ring of alloy material for aviation

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Example 1: Please refer to the attached figure 2 To attach Figure 5 , the invention discloses a method for forging a special-shaped ring of an alloy material for aviation, comprising the following steps:

[0044] a. Preheat the Inco783 bar material cut according to the specification at 1100°C for 2 hours, press it with a 3,000-ton press, punch and trim to obtain a round billet with an inner diameter of 125mm, and the final rolling temperature of this step is 900°C;

[0045] b. Preheat the round billet obtained in step a at 1040°C for 2 hours, then ring roll it until the inner hole is 352mm, and the final rolling temperature of this step is 900°C;

[0046]c. Preheat the billet obtained in step b at 996°C for 1 hour, then continuously ring-roll three fires, and the ring-rolling ratio of each fire is 9%, 14%, and 19% in turn; obtain a special-shaped ring with an inner hole of 733mm , the finishing temperature of this step is 900°C;

[0047] d. Aging: annealing the s...

Embodiment 2

[0056] Example 2: The invention discloses a method for forging a special-shaped ring of an alloy material for aviation, which comprises the following steps:

[0057] a. Preheat the nickel-based superalloy bar material blanked according to the specification at 1070°C for 3 hours, press it with a press, punch and trim the edges to obtain a round billet with a certain inner diameter, and the final rolling temperature of this step is 980°C;

[0058] b. Preheat the round billet obtained in step a at 1020°C for 2 hours, and then ring roll until the inner hole increases to a certain requirement. The final rolling temperature of this step is 900°C;

[0059] c. Preheat the billet obtained in step b at 1020°C for 2 hours, then continue ring rolling for three fires, and the ring rolling ratio of each fire is 7%, 12%, and 16% in turn; to obtain a special-shaped ring, the final step of this step The rolling temperature is 850°C;

[0060] d. Aging: annealing the special-shaped ring obtai...

Embodiment 3

[0063] Example 3: The invention discloses a method for forging a special-shaped ring of an alloy material for aviation, which comprises the following steps:

[0064] a. Preheat the nickel-based superalloy rods cut according to the specifications at 1180°C for 1.5 hours, press them with a press, punch holes and trim the edges to obtain a round billet with a certain inner diameter, and the final rolling temperature of this step is 900°C ;

[0065] b. Preheat the round billet obtained in step a at 1100°C for 2 hours, and then ring roll until the inner hole increases to a certain requirement. The final rolling temperature of this step is 850°C;

[0066] c. Preheat the billet obtained in step b at 1100°C for 2 hours, then continue ring rolling for three fires, and the ring rolling ratio of each fire is 8%, 14%, and 19% in turn; to obtain a special-shaped ring, the final step of this step The rolling temperature is 850°C;

[0067] d. Aging: annealing the special-shaped ring obta...

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Abstract

The invention relates to the field of metal forging, in particular to a method for forging a special-shaped ring of an alloy material for aviation. The method for forging special-shaped rings of aviation alloy materials provided by the present invention includes the following steps: a. Preheating the nickel-based superalloy rods blanked according to the specifications at a temperature of 1070°C to 1180°C, pressing them with a press, and punching holes Trimming to obtain a round billet; b. Preheating the round billet obtained in step a at a temperature of 1020°C-1100°C, and then performing ring rolling to expand the inner hole; c. Preheating the billet obtained in step b at 1020°C-1100°C Preheating at 1100°C, and then continuous ring rolling for three fires, the ring rolling ratio of each fire is 7-9%, 12-14%, 16-19% in turn; d, the special-shaped ring obtained in step c is heated at 800°C Annealing treatment under the temperature condition of -900° C.; e. Performing ring expansion again after solution treatment of the heteromorphic ring obtained in step d.

Description

technical field [0001] The invention relates to the field of metal forging, in particular to a method for forging a special-shaped ring of an alloy material for aviation. Background technique [0002] The special-shaped ring forgings of aero-engines or ground gas turbines made of nickel-based superalloys (such as GH4169 and other material grades), such as casings, aircraft engines and other parts, require forgings to have better performance and durability due to long-term work in harsh environments. Tissue temperature. [0003] Regarding the manufacturing process of special-shaped ring forgings for aviation parts, there are the following existing technologies: Chinese invention patent CN101020284A discloses a method for making a high-temperature alloy large-scale special-shaped cross-section ring billet. Upsetting into a solid cake base, punching out the center hole of the solid cake base with a punch to obtain a hollow cake base, heating the hollow cake base to the deforma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00B21H1/06
CPCB21H1/06B23P15/00C22C19/058
Inventor 黄震徐剑宋利兵
Owner 豪梅特航空机件(苏州)有限公司
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