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Process of making ring fine crystal blank of GH4169 alloy for near constant temperature forging

A GH4169, isothermal forging technology, which is applied in the blank making field of deformed superalloy forging blanks, can solve the problems of high cost of consolidated powder blanks, many technical difficulties, and great difficulty, so as to facilitate popularization and application, reduce forging costs, The effect of grain refinement

Active Publication Date: 2007-08-22
GUIZHOU ANDA AVIATION FORGING
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  • Claims
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Problems solved by technology

This patent application does not fully disclose how to use casting or forging billets with fine grains for forging, and the original blanks of casting, forging or rolling are relatively coarse in grains, so the forging method provided by this patent application is used to process the original blanks. It is difficult to obtain forgings with fine grains after forging
The crystal grains of the consolidated powder billet are relatively small, but there are also the following problems: First, the consolidated powder billet needs special metal powder making technology and powder making equipment to produce, but at present, due to the difficulty of metal powder making technology and powder making The high investment in equipment makes the cost of the consolidated powder billet higher and the price is more expensive; second, the metal powder technology needs to overcome many technical problems, resulting in the unstable quality of forgings produced by using the consolidated powder billet; The metal powder making technology belongs to Fangxing technology, which has not been widely used, which makes it difficult to obtain consolidated powder blanks

Method used

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  • Process of making ring fine crystal blank of GH4169 alloy for near constant temperature forging
  • Process of making ring fine crystal blank of GH4169 alloy for near constant temperature forging

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Embodiment Construction

[0018] To implement the method for producing fine-grained ring blanks for near-isothermal forging of GH4169 alloy of the present invention, it is necessary to provide forging heating furnaces, forging presses, rolling mills and cast, forged or rolled GH4169 alloy raw bars.

[0019] Figure 1 shows the process flow of the method for making a fine-grain ring blank for near-isothermal forging of GH4169 alloy. The operation steps of the method are as follows:

[0020] Step 1: Upsetting. Heat the GH4169 alloy bars according to the forging specifications to 980℃~1010℃ in a heating furnace, preferably at 1010℃, and then upset the bars to 1 / 3~1 / 3 of the original bar height on the forging press A pie is obtained at 1 / 2 height.

[0021] Step 2: Pull out. The primary cake blank described in step 1 is drawn on a forging press and changed back to the height of the original bar to obtain a secondary bar.

[0022] Step 3: Upsetting again. Heat the secondary bar described in step 2 in a heating fu...

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Abstract

The technological process of making ring fine crystal blank of GH4169 alloy for near constant temperature forging includes the following steps: heating the GH4169 alloy rod to 980-1010 deg.c, upsetting into the first cake blank of thickness in 1 / 3-1 / 2 the rod height, drawing the cake blank to secondary rod of original height, heating the secondary rod to 980-1010 deg.c, upsetting into the secondary cake blank of thickness in 1 / 3-1 / 2 the rod height, punching hole in the secondary cake blank, heating the cake blank to 980-1010 deg.c, and rolling to obtain ring fine crystal blank of 35-45 % deformation. The ring fine crystal blank may be near constant temperature forged into forging with fine crystal grains.

Description

Technical field [0001] The invention relates to a method for making a blank for deformed high-temperature alloy forging, in particular to a method for making a fine-crystal ring blank for near-isothermal forging of GH4169 alloy. Background technique [0002] GH4169 alloy is a precipitation-strengthened nickel-chromium-iron-based high-temperature alloy. Due to its high strength and narrow deformation temperature range, the alloy has a large deformation resistance and is difficult to forge. When the alloy is forged near isothermally, in order to obtain high-strength forgings with fine grains, the grains of the forging blank must be made fine. [0003] The Chinese Invention Patent Specification CN1500577A (application number: 200310103692.4) published on June 2, 2004 discloses a quasi-isothermal forging of a nickel-based superheat-resistant alloy, which is similar to the near-isothermal forging of the present invention. It is just that the temperature difference between the heating ...

Claims

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Application Information

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IPC IPC(8): C21D8/00B21J1/00
Inventor 叶俊青魏志坚夏欲民邹伟占立水张衡黎汝栋江飞龙刘朝辉
Owner GUIZHOU ANDA AVIATION FORGING
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