Method for refining grain structure of nickel-based alloy forging by regulating and controlling deformation temperature

A nickel-based alloy, deformation temperature technology, applied in the field of forging, can solve problems such as high cost and high energy consumption, and achieve the effect of inhibiting grain growth and grain refinement

Inactive Publication Date: 2017-10-24
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a method for refining the grain structure of nickel-based alloy forgings by adjusting and controlling the deformation temperature. The problem of high cost and high energy consumption in the grain structure of alloy forgings

Method used

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  • Method for refining grain structure of nickel-based alloy forging by regulating and controlling deformation temperature
  • Method for refining grain structure of nickel-based alloy forging by regulating and controlling deformation temperature
  • Method for refining grain structure of nickel-based alloy forging by regulating and controlling deformation temperature

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Embodiment 1

[0022] Step 1: The nickel-based alloy forging billet is subjected to solution treatment, the solution temperature is 1040°C, the solution time is 45 minutes, and then quenched in water, the obtained grain structure is as follows figure 1 shown;

[0023] Step 2: Plastic deformation of the solution-treated nickel-based alloy forging billet with a strain rate of 0.01s -1 , first heat the forging billet to the deformation temperature of 1040°C, and wait until the temperature of the forging billet is uniform and then start to deform. The deformation process includes two stages. The cooling rate of 5°C / s reduces the deformation temperature to 980°C, and the second stage of deformation begins after the temperature of the forging billet is kept uniform. The total deformation of the forging billet in the two stages is 70% (true strain 1.2). Example The relationship between deformation temperature and strain of 1 is as follows figure 2 shown;

[0024] Step 3: Immediately after the d...

Embodiment 2

[0027] Step 1: The nickel-based alloy forging billet is solution treated, the solution temperature is 1040°C, the solution time is 45min, and then quenched, the obtained grain structure is as follows figure 1 shown;

[0028] Step 2: Plastic deformation of the solution-treated nickel-based alloy forging billet with a strain rate of 0.01s -1 , first heat the forging billet to the deformation temperature of 1040°C, and wait until the temperature of the forging billet is uniform and then start to deform. The deformation process is divided into two stages. The deformation amount of the first stage is 40% (true strain 0.51). Reduce the deformation temperature to 980°C at a cooling rate of 5°C / s, and start the second stage of deformation after the heat preservation until the temperature of the forging billet is uniform. The total deformation of the forging billet in the two stages is 70% (true strain 1.2), implement The relationship between deformation temperature and strain of Exam...

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Abstract

The invention discloses a method for refining the grain structure of a nickel-based alloy forging by regulating and controlling the deformation temperature. The method comprises the following steps: (1) performing solid solution treatment on the nickel-based alloy forging stock and quenching; (2) performing plastic deformation on the nickel-based alloy forging stock on the condition that the strain rate is 0.001 s[-1]-0.1 s[-1]: firstly, heating the forging stock to a deformation temperature of 1030-1050 DEG C, and secondarily performing deformation after performing heat preservation on the forging stock until the forging stock is uniform in temperature, wherein the deformation process comprises two stages, the deformation amount at the first stage is 20%-40%, the deformation temperature is reduced to 950-1010 DEG C after the completion of deformation, the second-stage deformation is carried out until the forging stock after heat preservation is uniform in temperature, and the total deformation amount of the forging stock at the two stages is 60%-70%; and (3) immediately quenching the forging after the completion of deformation. According to the method for refining the grain structure of the nickel-based alloy forging by regulating and controlling the deformation temperature, the grain structure of the nickel-based alloy forging is refined by regulating and controlling the deformation temperature, and an effective means is provided for the manufacture of high quality forgings.

Description

Technical field: [0001] The invention belongs to the technical field of forging, and relates to a method for refining the grain structure of a nickel-based alloy forging by adjusting and controlling the deformation temperature. Background technique: [0002] Nickel-based alloy is a γ" phase (Ni 3 Nb) is the main strengthening phase, and the γ' phase (Ni 3 AlTi) is a nickel-based superalloy with an auxiliary strengthening phase. Because of its good comprehensive performance in the temperature range of -253°C to 700°C, especially at 650°C, it has high strength, high temperature resistance, corrosion resistance, oxidation resistance, and good creep and fatigue resistance, and is widely used For the manufacture of high-quality aero-engine components. [0003] The hot forging deformation process is an important way to obtain nickel-based alloy forgings with uniform and fine grain structure. Dynamic recrystallization is an important grain refinement mechanism during hot forgin...

Claims

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Application Information

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IPC IPC(8): C22F1/10
CPCC22F1/002C22F1/10
Inventor 蔺永诚吴凡陈明松
Owner CENT SOUTH UNIV
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