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Method for homogenizing gh4780 alloy ingot and gh4780 alloy casting and its application

A homogenization treatment and alloy ingot technology, which is applied in the field of homogenization treatment of GH4780 alloy ingots and GH4780 alloy castings, can solve the problems of poor homogenization treatment effect of GH4780 alloy ingots, achieve uniform distribution, eliminate stress, heat The effect of improving the deformation ability

Active Publication Date: 2021-06-22
BEIJING CISRI GAONA TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem that the homogenization treatment method of the prior art has a poor effect on the homogenization treatment of GH4780 alloy ingots, to provide a method for homogenization treatment of GH4780 alloy ingots and GH4780 alloy castings and its application

Method used

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  • Method for homogenizing gh4780 alloy ingot and gh4780 alloy casting and its application
  • Method for homogenizing gh4780 alloy ingot and gh4780 alloy casting and its application
  • Method for homogenizing gh4780 alloy ingot and gh4780 alloy casting and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The GH4780 alloy ingot (the ingot shape is Φ508 ± 20mm) is obtained by smelting through the double process. Tungsten, 18.9 wt% cobalt, 0.24 wt% iron, 0.81 wt% niobium, 1.26 wt% aluminum, 2.24 wt% titanium, not more than 0.005 wt% phosphorus, 0.0032 wt% boron, 0.98 wt% Tantalum, 0.0023 wt% copper, 0.005 wt% manganese, 0.029 wt% silicon, not more than 0.005 wt% vanadium, not more than 0.001 wt% magnesium, 0.0006 wt% sulfur, 50.76 wt% nickel.

[0052] The alloy ingot is processed according to the following heating process:

[0053] (1) Raise the temperature from room temperature to 700°C at a heating rate of 1°C / min, and keep it warm for 60 minutes;

[0054] (2) Raise the temperature to 950°C at a heating rate of 0.5°C / min, and keep it warm for 120min;

[0055] (3) Raise the temperature to 1100°C at a heating rate of 0.5°C / min, and keep it warm for 120min;

[0056] (4) Raise the temperature to 1175°C at a heating rate of 0.3°C / min, and keep it warm for 500 minutes for h...

Embodiment 2

[0060] The GH4780 alloy ingot was obtained by smelting through two-stage processes (same as Example 1).

[0061] The alloy ingot is processed according to the following heating process:

[0062] (1) Raise the temperature from room temperature to 700°C at a heating rate of 1.2°C / min, and keep it warm for 60 minutes;

[0063] (2) Raise the temperature to 950°C at a heating rate of 0.8°C / min, and keep it warm for 120min;

[0064] (3) Raise the temperature to 1150°C at a heating rate of 0.75°C / min, and keep it warm for 120min;

[0065] (4) Raise the temperature to 1200°C at a heating rate of 0.5°C / min, keep it warm for 700min for homogenization treatment, cool to 550°C with the furnace, and then air cool to room temperature to obtain GH4780 alloy casting A2.

[0066] The room temperature tensile properties of the GH4780 alloy casting A2 were tested according to the ASTM E8 standard, and the high temperature tensile properties of the GH4780 alloy casting A2 were tested according ...

Embodiment 3

[0069] The GH4780 alloy ingot was obtained by smelting through two-stage processes (same as Example 1).

[0070] The alloy ingot is processed according to the following heating process:

[0071] (1) Raise the temperature from room temperature to 900°C at a heating rate of 2°C / min, and keep it warm for 150min;

[0072] (2) Raise the temperature to 1050°C at a heating rate of 1.2°C / min, and keep it warm for 200 minutes;

[0073] (3) Raise the temperature to 1150°C at a heating rate of 1°C / min, and keep it warm for 200min;

[0074] (4) The temperature was raised to 1175°C at a heating rate of 1°C / min, and held for 4000 minutes for homogenization treatment, cooled to 550°C with the furnace, and then air cooled to room temperature to obtain GH4780 alloy casting A3.

[0075] The tensile properties at room temperature were tested according to the ASTM E8 standard, and the high-temperature tensile properties were tested according to the ASTM E21 standard. The results are shown in Ta...

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Abstract

The invention relates to the field of GH4780 alloy processing, in particular to a method for homogenizing and processing GH4780 alloy ingots, GH4780 alloy castings and applications thereof. The method comprises: homogenizing the GH4780 alloy ingot at 1175-1240° C. for 500-5000 min. The method of the invention realizes the uniform distribution of elements in the alloy ingot, eliminates the stress existing in the alloy ingot at the same time, and the thermal deformation ability of the GH4780 alloy casting after homogenization treatment is obviously improved.

Description

technical field [0001] The invention relates to the field of GH4780 alloy processing, in particular to a method for homogenizing and processing GH4780 alloy ingots, GH4780 alloy castings and applications thereof. Background technique [0002] The GH4780 alloy has excellent high-temperature mechanical properties, and its service temperature reaches 760°C. This is mainly due to two factors. First, the alloy matrix dissolves nearly twenty kinds of alloying elements, which play a solid solution strengthening role; second, the alloy matrix precipitates A large number of co-lattice ordered A 3 Type B intermetallic compound γ’-Ni 3 (Al, Ti, Ta) phases and MC carbides act as strengthening phases to produce precipitation strengthening effects. The above two strengthening mechanisms work together to make the alloy obtain good high temperature strength, durability, fatigue performance and oxidation resistance. However, the addition of a large number of alloying elements will cause s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/05C22F1/10C22C30/02
CPCC22C19/055C22C30/02C22F1/10
Inventor 谢兴飞曲敬龙杜金辉张国栋田成刚谷雨安腾唐超毕中南谢锦丽
Owner BEIJING CISRI GAONA TECH
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