Vacuum induction melting process of gh4720li alloy, gh4720li alloy and aviation parts

A technology for vacuum induction melting and parts, which is applied in the field of alloy manufacturing, can solve the problems of stability of smelting process, poor comprehensive use performance of controllable alloys, increase in metallurgical defects such as ingot shrinkage and cracks, etc., so as to increase the difficulty of work. , the effect of increasing the cooling time and improving the stability

Active Publication Date: 2021-01-08
BEIJING CISRI GAONA TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, at present, more emphasis is placed on smelting factors such as pouring temperature and pouring speed in the VIM pouring system, resulting in a significant increase in metallurgical defects such as shrinkage porosity, shrinkage cavities and cracks in the ingot, resulting in the stability and controllability of the subsequent smelting process And the overall performance of the alloy is poor

Method used

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  • Vacuum induction melting process of gh4720li alloy, gh4720li alloy and aviation parts
  • Vacuum induction melting process of gh4720li alloy, gh4720li alloy and aviation parts

Examples

Experimental program
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Embodiment 1

[0080] A vacuum induction melting process for GH4720Li alloy, comprising: injecting GH4720Li alloy liquid into an ingot mold with a temperature of 600°C to obtain GH4720Li alloy;

[0081] The ingot mold with a temperature of 600°C is mainly obtained by the following method: heating the ingot mold to 600°C and holding it for 8 hours;

[0082] The diameter of the ingot mold is 380mm, the temperature of the alloy liquid is 1530°C, and the injection time of the alloy liquid is 10min.

Embodiment 2

[0084] A vacuum induction melting process for GH4720Li alloy, comprising: injecting GH4720Li alloy liquid into an ingot mold with a temperature of 600°C to obtain GH4720Li alloy;

[0085] The ingot mold with a temperature of 600°C is mainly obtained by the following method: heating the ingot mold to 600°C and keeping it warm for 4 hours;

[0086] The diameter of the ingot mold is 380mm, the temperature of the alloy liquid is 1530°C, and the injection time of the alloy liquid is 10min.

[0087] Different from Example 1, the preparation method of the ingot mold with a temperature of 600° C. in this example is within the preferred scope of the present invention.

Embodiment 3

[0089] A vacuum induction melting process for GH4720Li alloy, comprising: injecting GH4720Li alloy liquid into an ingot mold with a temperature of 650° C. to obtain GH4720Li alloy;

[0090] The ingot mold with a temperature of 650°C is mainly obtained by the following method: heating the ingot mold to 650°C and keeping it warm for 5 hours;

[0091] The diameter of the ingot mold is 380mm, the temperature of the alloy liquid is 1530°C, and the injection time of the alloy liquid is 10min.

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Abstract

The invention provides a vacuum induction melting process for a GH4720Li alloy, the GH4720Li alloy and aviation parts. The vacuum induction melting process for the GH4720Li alloy comprises the step that a GH4720Li alloy liquid is injected into an ingot mold with the temperature ranging from 600 DEG C to 680 DEG C to obtain the GH4720Li alloy. According to the process, shrinkage porosity and the formation range and size of shrinkage holes can be reduced, and the generation of cracks can be reduced, so that the stability, the controllability and comprehensive alloy using performance in subsequent smelting processes such as ESR and / or VAR are improved.

Description

technical field [0001] The invention relates to the field of alloy manufacturing, in particular to a vacuum induction melting process of GH4720Li alloy, GH4720Li alloy and aviation parts. Background technique [0002] GH4720Li alloy is a Ni-Cr-Co-based precipitation-strengthened deformable high-temperature alloy. The service temperature is below 750°C. The alloy has high high-temperature strength, fatigue resistance and creep resistance, and long-term structural stability. At present, domestic superalloy manufacturers all prepare nickel-based superalloy GH4720Li electrodes required for electroslag remelting or vacuum arc remelting through vacuum induction melting process. [0003] However, at present, more emphasis is placed on smelting factors such as pouring temperature and pouring speed in the VIM pouring system, resulting in a significant increase in metallurgical defects such as shrinkage porosity, shrinkage cavities and cracks in the ingot, resulting in the stability a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/05B22D7/00C22C1/03
CPCB22D7/005C22C1/023C22C1/03C22C19/056
Inventor 曲敬龙杜金辉杨树峰谷雨安腾陈正阳毕中南秦鹤勇唐超王民庆史玉亭孟令胜荣义
Owner BEIJING CISRI GAONA TECH
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