Grain refinement method for large-size semi-continuous casting magnesium alloy ingot

A technology of grain refinement and magnesium alloy, which is applied in the field of magnesium alloy materials, can solve problems such as uneven grain size and coarse grain, and achieve macroscopically uniform grain size, fine grain and macroscopically uniform, which is conducive to popularization and application Effect

Active Publication Date: 2021-09-28
SHANGHAI SPACE PRECISION MACHINERY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem of uneven grain size and coarse grain size of existing large-scale magnesium alloy ingots, to provide a grain refinement method for large-scale semi-continuous casting magnesium alloy ingots, and to realize the prepared magnesium alloy ingots. The grain size of alloy products is uniform and fine

Method used

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  • Grain refinement method for large-size semi-continuous casting magnesium alloy ingot
  • Grain refinement method for large-size semi-continuous casting magnesium alloy ingot

Examples

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Effect test

Embodiment 1

[0042]A large-scale semi-continuous casting high rare earth magnesium alloy ingot. The magnesium ingot has a diameter of 200mm and a length of 1m. The contents of each component and their mass percentages: Gd is 15%; Zn is 1%; Zr is 0.5%; the balance It is Mg and unavoidable impurity elements (<1%).

[0043] A method for preparing a large-scale semi-continuous casting high rare earth magnesium alloy ingot, comprising the following steps:

[0044] S1. According to the size of the magnesium ingot and the burning of the alloy, the batching is carried out, and the intermediate alloy is preheated;

[0045] S2. Add magnesium ingots to the smelting furnace, and add various intermediate alloys at the required temperature, stir until completely melted, and transfer the magnesium melt to the refining furnace after smelting;

[0046] S3. Raise the temperature of the melt to 710°C, select JDMJ as the refining agent, refine for 5 minutes, skim off the surface scum after refining, and tran...

Embodiment 2

[0051] A large-scale semi-continuous casting high rare earth magnesium alloy ingot. The magnesium ingot has a diameter of 300mm and a length of 1m. The components and their mass percentage contents are as follows: Gd is 10%; Zr is 0.4%; Ti is 0.1%; the balance is Mg and unavoidable impurity elements (<1%).

[0052] A method for preparing a large-scale semi-continuous casting high rare earth magnesium alloy ingot, comprising the following steps:

[0053] S1. According to the size of the magnesium ingot and the burning of the alloy, the batching is carried out, and the intermediate alloy is preheated;

[0054] S2. Add magnesium ingots to the smelting furnace, and add various intermediate alloys at the required temperature, stir until completely melted, and transfer the magnesium melt to the refining furnace after smelting;

[0055] S3. Raise the temperature of the melt to 710°C, select JDMJ as the refining agent, refine for 5 minutes, skim off the surface scum after refining, a...

Embodiment 3

[0060] A large-scale semi-continuous casting high rare earth magnesium alloy ingot. The magnesium ingot has a diameter of 300mm and a length of 1m. The contents of each component and their mass percentages are as follows: Gd is 9%; Y is 4%; Zn is 1%; Zr is 0.4 %; the balance is Mg and unavoidable impurity elements (<1%).

[0061] A method for preparing a large-scale semi-continuous casting high rare earth magnesium alloy ingot, comprising the following steps:

[0062] S1. According to the size of the magnesium ingot and the burning of the alloy, the batching is carried out, and the intermediate alloy is preheated;

[0063] S2. Add magnesium ingots to the smelting furnace, and add various intermediate alloys at the required temperature, stir until completely melted, and transfer the magnesium melt to the refining furnace after smelting;

[0064] S3. Raise the temperature of the melt to 710°C, select JDMJ as the refining agent, refine for 5 minutes, skim off the surface scum af...

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Abstract

The invention provides a grain refinement method for a large-size semi-continuous casting magnesium alloy ingot. In the solidification process of a magnesium alloy melt, an Mg-Ti-Zr grain refinement alloy wire is fed to the middle part of the magnesium alloy melt through a wire feeding method, and the alloy wire comprises the following chemical components in percentage by mass: 0.5-15% of Ti, 10-25% of Zr, less than 1% of inevitable impurities and the balance of Mg. According to the method, grain refinement particle distribution of a large-size magnesium alloy cast ingot is regulated and controlled through a wire feeding method, temperature field distribution, component distribution and grain refiner distribution of the large-size magnesium alloy cast ingot generate a synergistic effect, the grain size of a macroscopic area is precisely regulated and controlled, and finally the large-size magnesium alloy cast ingot is fine in grain and macroscopically uniform in grain size; and the comprehensive mechanical property is improved, and popularization and application of the large-size magnesium alloy cast ingot are facilitated.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy materials, and in particular relates to a grain refinement method for large-size semi-continuous casting magnesium alloy ingots. Background technique [0002] As the lightest structural metal material, magnesium alloy has the advantages of high specific strength, high specific stiffness, excellent shock and noise reduction performance, good electromagnetic shielding performance, excellent machining performance, and easy recycling. It can replace traditional steel and aluminum alloys. , has broad application prospects in the fields of aviation, aerospace and automobiles. Among them, large-scale magnesium alloy ingots can be used to produce large-scale key components of aerospace equipment, and the lightweight effect is more significant, which has great application value and market prospects. [0003] At present, it is difficult to manufacture large-scale magnesium alloy ingots, and there a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C1/03C22C23/06B22D11/108
CPCC22C1/06C22C1/03B22D11/001B22D11/108C22C23/06
Inventor 王世伟肖旅王煜烨孙京丽陈舸周海涛孟佳杰康靓江善尧汪彦博
Owner SHANGHAI SPACE PRECISION MACHINERY RES INST
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