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Preparation method of gh4698 superalloy mold

A high-temperature alloy and mold technology, which is applied in the field of GH4698 high-temperature alloy mold preparation, can solve the problems of not being able to meet the requirements of long life, poor cavity size accuracy, and economical advantages, etc., and achieve a wide range of chemical composition and low cost , the effect of reducing the difficulty of smelting

Active Publication Date: 2021-10-22
中国第二重型机械集团德阳万航模锻有限责任公司
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Problems solved by technology

[0002] Commonly used rotating parts of aero-engines are high-temperature alloys such as GH4169. These rotating parts are usually in the form of die forgings. From the perspective of cost, the mold generally chooses hot-work die steel 5CrNiMo, and the operating temperature is 300 ° C. ℃, at this time, it will cause tempering softening, the wear of the mold will be intensified, the service life will be reduced, and the dimensional accuracy of the cavity will be deteriorated, which cannot meet the requirements of long service life.
The GH4698 superalloy die can be used to forge the common rotating parts of the GH4169 aero-engine, but the cost of the GH4698 superalloy die made of the traditional GH4698 superalloy forging rod is extremely high, and the economy has no advantages

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  • Preparation method of gh4698 superalloy mold
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preparation example Construction

[0030] For solving technical problem of the present invention, GH4698 superalloy mold preparation method of the present invention comprises:

[0031] a. Heating the ingot to 1160-1180°C for the first forging, the total deformation in the forging process is less than 20%;

[0032] b. Heating the ingot after the first forging to 1160-1180°C for the second forging, the total deformation in the forging process is less than 25%;

[0033] c. Heating the ingot after the second forging to 1160-1180°C for the third forging, the total deformation in the forging process is less than 35%;

[0034] d. peeling the ingot after forging for the third time in step c to obtain a bar stock;

[0035] e. The bar material obtained in step d is subjected to three-fire upsetting to complete the module manufacturing. When the three-fire upsetting bar is upsetting, the deformation amount does not exceed 40%, and after the upsetting is completed, it is rounded to eliminate the influence of the belly;

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Embodiment 1

[0054] Determine the selected mold specification according to the outer dimension of the die forging, and then add the machining allowance to the maximum outer dimension of the mold to determine the size of the module blank, plus the amount of damage in the process of ingot opening, the amount of bar skinning in bar processing, and the amount of damage in the upsetting process. Quantity, and finally determine the required GH4698 superalloy ingot size.

[0055] The mold specification required for a certain forging is φ920×370mm. According to the conversion, the required GH4698 superalloy ingot specification is φ610×905mm.

[0056] The composition of the ingot is: C 0.049%; Cr 14.69%; Ti 2.57%; Al 1.7%; Mo 3.06%; Ni balance; Nb 2.06%; Fe0.46%; Mn0.02%; Si0.06%; .001%; ​​P0.006%; Mg≤0.008%; Zr0.033%; B0.003%.

[0057] The GH4698 superalloy ingot billet forging equipment is a 45MN fast forging machine, the forging temperature is 1170±10°C, and it is heated by a natural gas furnac...

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Abstract

The invention relates to a method for preparing a GH4698 superalloy mold, belonging to the technical field of alloy materials. The preparation method of the GH4698 superalloy mold of the present invention includes: heating the ingot to 1160-1180°C for the first forging, the total deformation of the forging process is less than 20%; reheating to 1160-1180°C for the second forging, the forging process The total deformation is less than 25%; reheating to 1160-1180°C for the third forging, the total deformation of the forging process is less than 35%; the ingot after the third forging is peeled to obtain a bar; the obtained bar is 1140~1160℃ for three-fire upsetting to complete the module manufacturing. When three-fire upsetting, the upsetting deformation of the bar material does not exceed 40%. After the upsetting is completed, it is rounded to eliminate the influence of the belly; heat treatment and finishing process to obtain GH4698 superalloy mold. By adopting the method of the invention to prepare the mold, the cost is greatly reduced.

Description

technical field [0001] The invention relates to a method for preparing a GH4698 superalloy mold, belonging to the technical field of alloy materials. Background technique [0002] Commonly used rotating parts of aero-engines are high-temperature alloys such as GH4169. These rotating parts are usually in the form of die forgings. From the perspective of cost, the mold generally chooses hot-work die steel 5CrNiMo, and the operating temperature is 300 ° C. ℃, at this time, it will cause tempering softening, the wear of the mold will be intensified, the service life will be reduced, and the dimensional accuracy of the cavity will be deteriorated, which cannot meet the long service life requirements. The GH4698 superalloy die can be used to forge the common rotating parts of the GH4169 aero-engine, but the cost of the GH4698 superalloy die made of the traditional GH4698 superalloy forging rod is extremely high, and the economy has no advantages. [0003] In view of the above sit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/05C22F1/10
CPCC22C19/056C22F1/10
Inventor 张鹏周文武王周田刘洋常玥莹
Owner 中国第二重型机械集团德阳万航模锻有限责任公司
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