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Method for forging special-shaped alloy ring used for aviation

An alloy material and special-shaped ring technology, applied in the field of metal forging, can solve the problems of sudden change in grain size, large rolling deformation resistance, short ring forging time, etc., and achieve uniform and small grain size, accurate part size, and fine grain size. and uniform effect

Active Publication Date: 2014-12-03
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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  • Method for forging special-shaped alloy ring used for aviation
  • Method for forging special-shaped alloy ring used for aviation
  • Method for forging special-shaped alloy ring used for aviation

Examples

Experimental program
Comparison scheme
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 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 h, and then continue ring rolling for three fires. The ring rolling ratio of each fire is 9%, 14%, and 19% in turn; a special-shaped steel pipe with an inner hole of 733mm is obtained. ring, the final rolling temperature of this step is 900°C;

[0047] d. Aging:...

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 h, 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 step The final rolling temperature is 850°C;

[0060] d. Aging: annealing the special-shaped ring obtained in step c for...

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 h, then continuously ring-roll three fires, and the ring-rolling ratio of each fire is 8%, 14%, and 19% in turn; to obtain a special-shaped ring, the step The final rolling temperature is 850°C;

[0067] d. Aging: annealing the special-shaped ring obtained in step c for 4...

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PUM

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Abstract

The invention relates to the field of metal forging, in particular to a method for forging a special-shaped alloy ring used for aviation. The method for forging the special-shaped alloy ring used for aviation comprises steps as follows: a, a nickel-base superalloy bar blanked according to the specification is preheated at the temperature of 1,070 DEG C-1,180 DEG C, pressed by a press and punched and trimmed to obtain a round billet; b, the round billet obtained from the step a is preheated at the temperature of 1,020 DEG C-1,100 DEG C and then is subjected to ring rolling to expand the inner hole; c, the billet obtained from the step b is preheated at the temperature of 1,020 DEG C-1,100 DEG C and then is subjected to continuous ring rolling by fire for three times, and the rates for ring rolling by fire each time are 7%-9%, 12%-14% and 16%-19% sequentially; d, the special-shaped ring obtained from the step c is subjected to annealing treatment at the temperature of 800 DEG C-900 DEG C; and e, the special-shaped ring obtained from the step d is subjected to solution treatment and then is expanded.

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 CN 101020284A discloses a method for making a high-temperature alloy large-scale special-shaped cross-section ring billet. In this method, the high-temperature alloy rod is heated to the deformation temperature After upsetting into a solid cake base, use a punch to punch out the center hole of...

Claims

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Application Information

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Patent Type & Authority Applications(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