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

A GH4169, isothermal forging technology, applied in the field of blank making of deformed superalloy forging blanks, can solve the problems of high cost of consolidated powder blanks, many technical problems, unstable quality of forgings, etc. Cost, Ease of Access

Active Publication Date: 2009-06-17
GUIZHOU ANDA AVIATION FORGING
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 making a fine-grained ring billet for near-isothermal forging of GH4169 alloy according to the present invention, it is necessary to provide a forging heating furnace, a forging press, a rolling mill and a cast, forged or rolled GH4169 alloy original rod.

[0019] figure 1 Shown is the technological process of the billet making method of the fine-grained ring blank for near-isothermal forging of GH4169 alloy, and the operation steps of the billet making method are as follows:

[0020] Step 1: Upsetting. Heat the GH4169 alloy rods blanked according to the forging specifications to 980 ° C ~ 1010 ° C in the heating furnace, preferably at a temperature of 1010 ° C, and then upset the bars to 1 / 3 ~ 1 / 3 of the height of the original bars on the forging press 1 / 2 height to get a cake base.

[0021] Step 2: Pull out the length. The primary cake blank described in step 1 is drawn on a forging press to return to the height of the original bar to ob...

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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 blank-making method for a deformed high-temperature alloy forging blank, in particular to a method for making a fine-grained ring blank for near-isothermal forging of a GH4169 alloy. Background technique [0002] GH4169 alloy is a precipitation-strengthened nickel-chromium-iron-based superalloy. 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 nearly isothermally forged, in order to obtain a high-strength forging with fine grains, it is first necessary to make the grains of the forged blank 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 superalloy. The quasi-isothermal forging is similar to the near-isothermal forging described in the present invention. Only the temperature differe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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