Aging strengthening heat treatment method for nickel-based alloy GH4169

A technology of GH4169 and heat treatment method, which is applied in the field of aging strengthening heat treatment of GH4169 nickel-based alloy, can solve the problems that the heat treatment process cannot meet the requirements of special users, and achieve the effects of reducing heating defects, improving material plasticity and yield, and improving performance

Inactive Publication Date: 2020-02-04
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] With the development of economy and technology, the range of application of nickel-based alloy GH4169 materials is becoming wider and wider, and its traditional heat treatment process can no longer meet the requirements of special users, such as the field of high-temperature molds, etc.

Method used

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  • Aging strengthening heat treatment method for nickel-based alloy GH4169
  • Aging strengthening heat treatment method for nickel-based alloy GH4169
  • Aging strengthening heat treatment method for nickel-based alloy GH4169

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Effect test

Embodiment 1

[0027] The aging strengthening heat treatment method of the nickel-based alloy GH4169 in this embodiment includes a full solution treatment and a two-stage aging treatment process, and the specific process steps are as follows:

[0028] (1) Full solution treatment process: Nickel-based alloy GH4169 material is kept at 1000°C for 1.5h;

[0029] (2) Two-stage aging treatment process: one-stage aging treatment, the nickel-based alloy GH4169 material is heated to 780°C at a rate of 200°C / h, and kept for 18 hours; Cool at 55°C / h to 680°C, keep warm for 25h, take out the furnace and air cool to room temperature.

[0030] The scanning electron microscope picture of the GH4169 nickel-based alloy material after aging strengthening by the method of this embodiment is shown in figure 1 , the scanning electron microscope image of GH4169 nickel-based alloy material after standard aging strengthening treatment is shown in Figure 9 ;The figure shows, figure 1 , Figure 9 The medium γ″ p...

Embodiment 2

[0033] The aging strengthening heat treatment method of the nickel-based alloy GH4169 in this embodiment includes a full solution treatment and a two-stage aging treatment process, and the specific process steps are as follows:

[0034] (1) Full solution treatment process: Nickel-based alloy GH4169 material is kept at 1050°C for 1.2h;

[0035] (2) Two-stage aging treatment process: one-stage aging treatment, the nickel-based alloy GH4169 material is heated to 750°C at a rate of 180°C / h, and kept for 15 hours; Cool at 55°C / h to 650°C, keep warm for 20h, take out the furnace and air cool to room temperature.

[0036] The scanning electron microscope picture of the GH4169 nickel-based alloy material after aging strengthening by the method of this embodiment is shown in figure 2 , the scanning electron microscope image of GH4169 nickel-based alloy material after standard aging strengthening treatment is shown in Figure 9 ;The figure shows, figure 2 , Figure 9 The medium γ″...

Embodiment 3

[0039] The aging strengthening heat treatment method of the nickel-based alloy GH4169 in this embodiment includes a full solution treatment and a two-stage aging treatment process, and the specific process steps are as follows:

[0040] (1) Full solution treatment process: Nickel-based alloy GH4169 material is kept at 1030°C for 1.8h;

[0041] (2) Two-stage aging treatment process: one-stage aging treatment, the nickel-based alloy GH4169 material is heated to 730°C at a rate of 150°C / h, and kept for 12 hours; the second-stage aging treatment is completed, and the nickel-based alloy GH4169 material is Cool at 55°C / h to 630°C, keep warm for 18h, take out the furnace and air cool to room temperature.

[0042] The scanning electron microscope picture of the GH4169 nickel-based alloy material after aging strengthening by the method of this embodiment is shown in image 3 , the scanning electron microscope image of GH4169 nickel-based alloy material after standard aging strengtheni...

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Abstract

The invention discloses an aging strengthening heat treatment method for nickel-based alloy GH4169. The method comprises full solution treatment and a two-stage aging treatment process. A nickel-basedalloy GH4169 material is subjected to the full solution treatment by preserving the heat for 1 to 3 hours at 980 to 1,070 DEG C; the two-stage aging treatment process comprises first-stage aging treatment, namely, rising the temperature of the nickel-based alloy GH4169 material to 730 to 780 DEG C at the speed of 150 to 200 DEG C/h and preserving the heat for 12 to 18 hours; and second-stage aging treatment, namely, cooling the nickel-based alloy GH4169 material to 630 to 680 DEG C at the speed of 55 DEG C/h and preserving the heat for 18 to 25 hours, discharging the nickel-based alloy GH4169material out of a furnace, and performing air-cooling to room temperature. According to the aging strengthening heat treatment method for the nickel-based alloy GH4169, the tensile strength and yieldstrength of the nickel-based alloy GH4169 at room temperature can be remarkably improved; the hardness at the room temperature is obviously improved; the comprehensive performance of the material isobviously improved; and the service life of the material is obviously prolonged.

Description

technical field [0001] The invention belongs to the technical field of nickel-based alloy heat treatment, and in particular relates to an aging strengthening heat treatment method of GH4169 nickel-based alloy. Background technique [0002] GH4169 is an age-strengthened nickel-iron-based deformable superalloy with body-centered square γ″ and face-centered cubic γ′ as the main strengthening phase. It has good fatigue resistance, radiation resistance and oxidation resistance in the temperature range of -253 to 700 °C , corrosion resistance, as well as good processing performance, welding performance and long-term organizational stability, it can manufacture various parts with complex shapes, and has been widely used in aerospace, nuclear energy, and petroleum industries. [0003] The standard aging strengthening heat treatment process and performance indicators of the alloy are shown in Table 1: [0004] [0005] With the development of economy and technology, the range of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/10
CPCC22F1/10
Inventor 韩彦光张雲飞吕达崔毅任帅郭福在张坤
Owner HEBEI IRON AND STEEL
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