Grain refinement method for GH4169 high-temperature alloy plate

A GH4169, superalloy technology, applied in metal rolling, furnace, heat treatment equipment and other directions, can solve problems such as unfavorable industrialized mass production, complex process flow, low production efficiency, etc., and achieve short heat treatment time, simple process flow, and production efficiency. improved effect

Active Publication Date: 2022-04-22
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current methods for grain refinement of GH4169 superalloy plates generally have problems such as high equipment requirements, complicated process flow, unfavorable industrialized mass production, low production efficiency, and high production costs.

Method used

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  • Grain refinement method for GH4169 high-temperature alloy plate
  • Grain refinement method for GH4169 high-temperature alloy plate
  • Grain refinement method for GH4169 high-temperature alloy plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Solution treatment: The treatment temperature is 1060°C, the holding time is 1h, and water cooling.

[0041] Large deformation cold rolling: the reduction rate of cold rolling is 84%; the reduction per pass is 0.3mm.

[0042] δ phase precipitation treatment: the treatment temperature is 860°C, and the holding time is 10h.

[0043]Temperature rise: the heating rate is 10°C / min.

[0044] Recrystallization annealing: the annealing temperature is 950°C; the holding time is 3h, air cooling. The microstructure of the alloy plate finally obtained in this embodiment is as follows: Figure 4 shown. From Figure 4 It can be seen that the microstructure of the alloy sheet obtained in this example is fine and uniform, the average grain size is less than 3 μm, and the grain size rating is ASTM13.5.

Embodiment 2

[0046] Solution treatment: The treatment temperature is 1050°C, the holding time is 1h, and water-cooled.

[0047] Large deformation cold rolling: the reduction rate of cold rolling is 76%; the reduction per pass is 0.3mm.

[0048] δ phase precipitation treatment: the treatment temperature is 860°C, and the holding time is 10h.

[0049] Temperature rise: the heating rate is 10°C / min.

[0050] Recrystallization annealing: the annealing temperature is 950°C; the holding time is 3h, air cooling. The microstructure of the alloy plate finally obtained in this embodiment is as follows: Figure 5 shown. From Figure 5 It can be seen that the microstructure of the alloy plate obtained in this example is fine and uniform, the average grain size is less than 3 μm, and the grain size rating is ASTM14.5.

Embodiment 3

[0052] Solution treatment: The treatment temperature is 1050°C, the holding time is 1h, and water-cooled.

[0053] Large deformation cold rolling: the reduction rate of cold rolling is 84%; the reduction per pass is 0.3mm.

[0054] δ phase precipitation treatment: the treatment temperature is 840°C, and the holding time is 5h.

[0055] Temperature rise: the heating rate is 10°C / min.

[0056] Recrystallization annealing: the annealing temperature is 950°C; the holding time is 3h, air cooling. The microstructure of the alloy plate finally obtained in this embodiment is as follows: Figure 6 shown. From Figure 6 It can be seen that the microstructure of the alloy plate obtained in this example is fine and uniform, the average grain size is less than 3 μm, and the grain size rating is ASTM14.

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Abstract

The invention provides a grain refinement method of a GH4169 high-temperature alloy plate, which comprises the following steps: solution treatment: the treatment temperature is 1050-1060 DEG C, the heat preservation time is 0.5-1 hour, and water cooling is carried out; performing large-deformation cold rolling, wherein the cold rolling reduction rate is controlled to be 75-85%; delta-phase precipitation treatment: the treatment temperature is 840-860 DEG C, and the heat preservation time is 5-10 hours; recrystallization annealing is conducted, specifically, the temperature is increased to 950-960 DEG C at the heating rate of 10-15 DEG C/min; and the heat preservation time is 1-3 hours. The grain refinement method for the GH4169 high-temperature alloy plate is simple in process, low in cost and remarkable in grain refinement effect.

Description

technical field [0001] The invention belongs to the technical field of grain refinement of nickel-based high-temperature alloy plates, and in particular relates to a grain refinement method of GH4169 high-temperature alloy plates. Background technique [0002] GH4169 alloy is a precipitation-strengthened nickel-based superalloy with good high-temperature mechanical properties, excellent corrosion resistance and oxidation resistance, and is widely used in important fields such as aerospace, petrochemical, and nuclear energy applications. However, due to the high temperature deformation resistance of the alloy and the serious strain hardening tendency, when using plastic processing methods such as forging and extrusion to produce heterogeneous parts, the requirements for molds and equipment are relatively high. [0003] In order to improve the formability of alloys, superplastic forming technology provides a more feasible method. This technology has the advantages of large def...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/10C21D9/00B21B1/02B21B3/00B21B37/56
CPCC22F1/10C21D9/0081B21B1/026B21B3/00B21B37/56
Inventor 王丙兴杨旭陈淑楠王斌田勇王国栋
Owner NORTHEASTERN UNIV
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