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Method for forging and sleeve packaging of ultra-large type nickel-base superalloy turbine disc

A technology of nickel-based superalloys and superalloys, which is used in manufacturing tools, metal processing equipment, forging/pressing/hammer devices, etc. It can meet the requirements of the forging process for the temperature control accuracy of the forgings, and achieve the effects of not easily falling off, improving the microstructure and mechanical properties, and reducing the risk of damage.

Inactive Publication Date: 2013-11-20
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, this method has many limitations and cannot fully meet the requirements of the forging process on the temperature control accuracy of forgings, especially the following outstanding problems:
Therefore, this method still cannot fully meet the thermal insulation performance requirements of superalloy thermal processing.

Method used

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  • Method for forging and sleeve packaging of ultra-large type nickel-base superalloy turbine disc
  • Method for forging and sleeve packaging of ultra-large type nickel-base superalloy turbine disc
  • Method for forging and sleeve packaging of ultra-large type nickel-base superalloy turbine disc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The regular Φ600mm×1260mm cylindrical rod blank was heated and kept, the initial grain size was 150μm, and the actual composition of the selected superalloy was measured as C: 0.06%; Al: 1.42%; Ti: 3.15%; Co: 13.5%; Cr: 20.0%; Mo: 4.1%; Ni balance.

[0050] Step 1. The initial cylindrical superalloy billet is heated and kept warm.

[0051] Put the high-temperature alloy billet bar in the effective area of ​​the electric furnace, and pad it with refractory bricks below to ensure that the high-temperature alloy billet is heated evenly. The heating temperature of the electric furnace is controlled at 1060 ° C and kept for 15 hours.

[0052] Step 2. After the billet is heated and kept warm, the billet is taken out for heat wrapping.

[0053] After heating the superalloy billet, take it out of the furnace and wrap it quickly. Firstly, soft wrap: wrap the superalloy billet with insulation cotton, and use a high-temperature adhesive to bond the superalloy billet and the insul...

Embodiment 2

[0061] In this example, a cylindrical rod blank of Φ508mm×1200mm was used for heating and heat preservation, and its initial grain size was 150 μm, and the actual composition of the selected superalloy was measured as C: 0.06%; Al: 1.45%; Ti: 3.10%; Co : 13.2%; Cr: 19.3%; Mo: 4.4%; Ni balance.

[0062] The difference between its sheath and forging process and embodiment 1 is:

[0063] The heating temperature of the electric furnace in step 1 is controlled at 1030°C, and the holding time is 10h;

[0064] The heating temperature of the electric furnace in step 3 is controlled at 1030° C., and the holding time is 3 hours;

[0065] Other steps are identical to Example 1. After testing, the room temperature, high temperature tensile properties and durability properties all meet the technical requirements.

Embodiment 3

[0067] In this example, a cylindrical rod blank of Φ600mm×1240mm was used for heating and heat preservation, and its initial grain size was 135 μm, and the actual composition of the selected superalloy was measured as C: 0.07%; Al: 1.38%; Ti: 3.5%; Co : 13.0%; Cr: 19.5%; Mo: 4.3%; Ni balance.

[0068] The difference between the sheathing and forging process and that of Example 1 is that the thickness of the soft sheathing in step 2 is 5mm, and the thickness of the stainless steel strip of the hard sheathing is 1.5mm.

[0069] Other steps are identical to Example 1. After testing, the room temperature, high temperature tensile properties and durability properties all meet the technical requirements.

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Abstract

The invention discloses a method for forging and sleeve packaging of an ultra-large type nickel-base superalloy turbine disc and relates to a method for heating and sleeve packaging of nickel-base superalloy during the forging process of a turbine disc. The method for forging and sleeve packaging of the ultra-large type nickel-base superalloy turbine disc is realized through the following steps: Step 1, heating and heat preserving an original cylindrical superalloy blank; Step 2, performing heat packaging on the superalloy blank after heating and heat preserving; Step 3, remelting the superalloy blank for heating and heat preserving after heat sleeve packaging. The method, disclosed by the invention, solves the problems that a traditional sleeve packaging method causes the superalloy blank to be heated for an unnecessarily long time in a furnace, a soft sleeve is easy to fall off and the clamp is easy to damage, can effectively solve the problem that the temperature of the superalloy blank is decreased during the delivery and forging processes, avoids cracking of a forge piece during the deformation process, effectively reduces the deformation resistance of the forge piece, and can obtain ideal crystalline grain structures.

Description

technical field [0001] The invention relates to a sheathing method applied to the forging of a super-large nickel-based high-temperature alloy turbine disc, which is used for controlling the forging temperature and heat preservation during the thermal processing of metal materials in the metallurgical and mechanical industries. It is a special sheathing method for thermal processing. It is especially suitable for the situation where the deformation temperature of the billet must be strictly controlled for super-large and difficult-to-deform nickel-based superalloys. Background technique [0002] Nickel-based superalloys are widely used as turbine disk materials in petroleum, chemical, thermal and nuclear power industries due to their excellent high-temperature properties. During the use of the turbine disk, the working temperature is generally above 550°C, and its performance is mainly determined by the alloy structure. However, because nickel-based superalloys have high al...

Claims

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Application Information

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IPC IPC(8): B21K29/00B21K3/00
Inventor 姚志浩董建新张麦仓李蓬川
Owner BC P INC CHINA NAT PETROLEUM CORP
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