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Manufacturing method of fine-grain NiCr20TiAl alloy forged material

A manufacturing method and alloy technology, applied in the field of metal material manufacturing, can solve problems such as inapplicability

Inactive Publication Date: 2021-05-18
苏州集萃高合材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent application 20191228401.5 discloses the production method of nickel-based GH4080A alloy wire rod, which adopts the processes of vacuum induction smelting, electroslag remelting, forging blanking, and rolling wire rod, but it is not suitable for fine grain after 8 hours of heat preservation at 1050-1080°C Microstructure, larger size GH4080A alloy forging products

Method used

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  • Manufacturing method of fine-grain NiCr20TiAl alloy forged material
  • Manufacturing method of fine-grain NiCr20TiAl alloy forged material
  • Manufacturing method of fine-grain NiCr20TiAl alloy forged material

Examples

Experimental program
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Effect test

Embodiment 1

[0019] A method for manufacturing a fine-grained NiCr20TiAl alloy forging material. First, the NiCr20TiAl alloy is melted in a 1-ton vacuum induction furnace, and an electrode with a diameter of 290 mm is cast under vacuum conditions. The mass fraction of each ingredient is shown in the table below.

[0020] element Cr Ti Al C Mo Ni Content (mass fraction%) 20.5 2.6 1.7 0.07 0.25 Remain

[0021] In the second step, the electrode is remelted into an electroslag ingot with a diameter of 390mm using argon protection electroslag, wherein the melting rate is 3.5kg / min, and the flow rate of argon gas is 30L / min.

[0022] The third step is to perform high-temperature homogenization heat treatment on the electroslag ingot in a resistance heating furnace. The homogenization treatment process is 1200 ° C for 48 hours, and the furnace is cooled.

[0023] In the fourth step, a 2,000-ton fast forging machine is used to open the ingot to form a material. ...

Embodiment 2

[0032] A method for manufacturing a fine-grained NiCr20TiAl alloy forging material. First, the NiCr20TiAl alloy is melted in a 1-ton vacuum induction furnace, and an electrode with a diameter of 290 mm is cast under vacuum conditions. The mass fraction of each ingredient is shown in the table below.

[0033]

[0034] In the second step, the electrode is remelted into an electroslag ingot with a diameter of 390mm using argon protection electroslag, wherein the melting rate is 4kg / min, and the argon gas flow rate is 30L / min.

[0035] The third step is to perform high-temperature homogenization heat treatment on the electroslag ingot in a resistance heating furnace. The homogenization treatment process is 1200 ° C for 48 hours, and the furnace is cooled.

[0036] In the fourth step, a 2,000-ton fast forging machine is used to open the ingot to form a material. The heating temperature of the ingot is 1150°C. The specific process is as follows:

[0037] First fire: upsetting th...

Embodiment 3

[0045] A method for manufacturing a fine-grained NiCr20TiAl alloy forging material. First, the NiCr20TiAl alloy is melted in a 1-ton vacuum induction furnace, and an electrode with a diameter of 290 mm is cast under vacuum conditions. The mass fraction of each ingredient is shown in the table below.

[0046]

[0047] In the second step, the electrode is remelted into an electroslag ingot with a diameter of 390 mm using argon protection electroslag, wherein the melting rate is 3 kg / min, and the argon gas flow rate is 10 L / min.

[0048]The third step is to perform high-temperature homogenization heat treatment on the electroslag ingot in a resistance heating furnace. The homogenization treatment process is 1180 ° C for 72 hours, and the furnace is cooled.

[0049] In the fourth step, a 2,000-ton fast forging machine is used to open the ingot into a material. The heating temperature of the ingot is 1080°C. The specific process is as follows:

[0050] First fire: upsetting the...

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Abstract

The invention discloses a manufacturing method of a fine-grain NiCr20TiAl alloy forged material, which comprises the following steps: in the smelting process, controlling the C element to be 0.06-0.10%, controlling the Cr element to be 20.0-22.0%, and adding 0.15-0.50% of Mo element at the same time; the vacuum induction melting and electroslag remelting ingot is subjected to a high-temperature homogenization heat treatment process, so that the C, Cr and Mo elements are uniformly diffused; and the heating temperature and the deformation time of the final heating number are controlled during forging. Through the measures, the NiCr20TiAl alloy forged material produced through the method can eliminate the grain coarsening tendency during subsequent high-temperature solution treatment, the forged material is subjected to solution heat treatment at the temperature of 1050-1080 DEG C for 8 h, the average grain size can obtain five-level fine grains or a better level, and meanwhile the forged material has good obdurability after aging treatment.

Description

technical field [0001] The invention belongs to the field of metal material manufacturing, in particular to a method for manufacturing fine-grained NiCr20TiAl alloy forgings. Background technique [0002] NiCr20TiAl alloy, also known as GH4080A or GH80A, is a nickel-chromium-based superalloy in which the face-centered cubic γ′ is the main precipitation strengthening phase. The alloy has good creep resistance and oxidation resistance in the range of 650°C to 850°C. The alloy has good cold and hot workability, and is widely used in the manufacture of rotor blades, guide vane supports, sector mounting rings, Bolts, blade lock plates and other parts, fasteners and blades of automobile engines, high temperature blades for steam turbines, exhaust valves for marine diesel engines, etc. [0003] With the development of aviation and steam turbine industries, in order to improve the service life of parts, materials are required to have good plasticity, high temperature durability and...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C19/05C22F1/10C21D9/00B21J5/00
CPCB21J5/002C21D9/0075C22C1/023C22C19/055C22F1/10Y02P10/20
Inventor 沈海军王资兴张思允王国栋杨春雷陈国胜
Owner 苏州集萃高合材料科技有限公司
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