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Method for crystal grain homogenization of GH3128 high-temperature alloy

A technology of GH3128 and high-temperature alloy, which is applied in the field of forging technology, can solve the problems of ineffective correction, waste of resources, and easy occurrence of mixed crystals, etc., and achieve the effects of improving batch scrapping, saving production costs, and refining grains

Active Publication Date: 2018-11-13
WUXI PAIKE HEAVY CASTING & FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] GH3128 is a nickel-based alloy that is strengthened by solid solution of tungsten and molybdenum and strengthened by boron, cerium and zirconium at the grain boundary. The performance is superior to similar nickel-based solid solution alloys such as GH3044 and GH3536. It is suitable for the manufacture of combustor flame tubes, afterburner shells, regulator plates and other high-temperature parts of aero-engines that work at 950 ° C for a long time. The main products are Cold-rolled sheet can also supply hot-rolled sheet, bar, forging, wire and pipe. In the production process, due to various factors such as personnel, equipment, environment, raw materials and technology, GH3128 alloy is prone to mixed after forging. crystals, that is, 20% of the 2nd grade grains and 80% of the 4th grade grains. In the prior art, after the mixed crystals of the superalloy GH3128 are produced, the GH3128 mixed crystals cannot be effectively corrected, so it is easy to cause batch scrapping, resulting in Rising costs and waste of resources

Method used

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  • Method for crystal grain homogenization of GH3128 high-temperature alloy

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Experimental program
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Effect test

Embodiment 1

[0034] The GH3128 superalloy crystal grain homogenization method of the present embodiment, its specific process step is as follows:

[0035] Step 1: Heating: After heating the coarse-grained GH3128 rod to 1125°C, keep it warm for 100 minutes;

[0036] Step 2: If figure 1 As shown, X-axis radial elongation and upsetting: place one end of the bar processed in step 1 perpendicular to the Z-axis on the press platform, and alternately forge along the Z-axis and Y-axis respectively, so that the bar The material is drawn along the X-axis direction; then the end surface of the bar material perpendicular to the X-axis is placed on the press platform, and it is upset along the X-axis direction, and the height of the upsetting to the X-axis direction is equal to the original bar size before processing;

[0037] Step 3: Return the hot material to the furnace: return the bar obtained in step 2 to the furnace for heating for 70 minutes;

[0038] Step 4: If figure 2 As shown, Y-axis rad...

Embodiment 2

[0043] The GH3128 superalloy crystal grain homogenization method of the present embodiment, its specific process step is as follows:

[0044] Step 1: Heating: After heating the coarse-grained GH3128 rod to 1130°C, keep it warm for 90 minutes;

[0045] Step 2: If figure 1 As shown, X-axis radial elongation and upsetting: place one end of the bar processed in step 1 perpendicular to the Z-axis on the press platform, and alternately forge along the Z-axis and Y-axis respectively, so that the bar The material is drawn along the X-axis direction; then the end surface of the bar material perpendicular to the X-axis is placed on the press platform, and it is upset along the X-axis direction, and the height of the upsetting to the X-axis direction is equal to the original bar size before processing;

[0046] Step 3: return the hot material to the furnace: return the bar obtained in step 2 to the furnace for heating for 60 minutes;

[0047] Step 4: If figure 2 As shown, Y-axis radi...

Embodiment 3

[0052] The GH3128 superalloy crystal grain homogenization method of the present embodiment, its specific process step is as follows:

[0053] Step 1: Heating: After heating the coarse-grained GH3128 rod to 1120°C, keep it warm for 120 minutes;

[0054] Step 2: If figure 1 As shown, X-axis radial elongation and upsetting: place one end of the bar processed in step 1 perpendicular to the Z-axis on the press platform, and alternately forge along the Z-axis and Y-axis respectively, so that the bar The material is drawn along the X-axis direction; then the end surface of the bar material perpendicular to the X-axis is placed on the press platform, and it is upset along the X-axis direction, and the height of the upsetting to the X-axis direction is equal to the original bar size before processing;

[0055] Step 3: return the hot material to the furnace: return the bar obtained in step 2 to the furnace for heating for 80 minutes;

[0056] Step 4: If figure 2 As shown, Y-axis radia...

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Abstract

The invention relates to a method for crystal grain homogenization of a GH3128 high-temperature alloy. Radial and axial upsetting and drawing is adopted for a GH3128 forged piece forming mixed crystals. Specific process steps include that a coarse-grain GH3128 bar is heated to 1120-1130 DEG C, X axis radial draw-out and upsetting and hot material remelting heating are correspondingly performed onthe bar, then Y axis radial draw-out and upsetting and hot material remelting heating, and Z axis draw-out and cooling are performed, crystal grains in various direction are made to obtain great kinetic energy for recrystallization, and recrystallization is generated; and a purpose of refining the crystal grains is achieved, the batch scrap problem caused by the mixed crystal problem can be eliminated or solved, resources are saved, and the production cost is saved.

Description

technical field [0001] The invention relates to the technical field of forging technology, in particular to a method for homogenizing GH3128 superalloy grains. Background technique [0002] GH3128 is a nickel-based alloy strengthened by solid solution of tungsten and molybdenum and strengthened by boron, cerium and zirconium at the grain boundary. The performance is superior to similar nickel-based solid solution alloys such as GH3044 and GH3536. It is suitable for the manufacture of combustor flame tubes, afterburner shells, regulator plates and other high-temperature parts of aero-engines that work at 950 ° C for a long time. The main products are Cold-rolled sheets can also supply hot-rolled sheets, bars, forgings, wires and pipes. During the production process, due to various factors such as personnel, equipment, environment, raw materials and processes, GH3128 alloy is prone to mixed after forging. crystals, that is, 20% of the 2nd grade grains and 80% of the 4th grade...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/10
CPCC22F1/10
Inventor 王骏刘智陈翠刘其源许亮许志成连忠礼
Owner WUXI PAIKE HEAVY CASTING & FORGING
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