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Preparation process of ZK61M magnesium alloy bar with diameter of 720 mm

A ZK61M and preparation process technology, applied in the field of ZK61M magnesium alloy bar preparation technology, can solve the problems of large amount of bottom solvent, large and deep cold insulation of the bar, large combustion loss, etc., to reduce production cost, shorten production time, The effect of improving production efficiency

Active Publication Date: 2018-06-15
洛阳晟雅镁合金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As the usage of ZK61M magnesium alloy increases at an annual rate of 25% in recent years, the existing production process and crystallizer cannot meet the needs of the existing market more and more, and the existing production process has the following problems: 1. During the melting process, due to the large loss of magnesium combustion, the amount of base solvent is too large. At the same time, the quality of the selected solvent varies greatly due to different manufacturers. Generally, mechanical or even manual stirring is used, which is very easy to cause the presence of impurities in the magnesium alloy liquid and several Uneven distribution of metals, resulting in alloy segregation
3. At present, the diameter of the crystallizer used for casting ZK61M magnesium alloy is generally between 130-500mm. If the magnesium alloy rod with a larger diameter is prepared, the existing casting technology is backward. At the same time, due to the characteristics of ZK61M magnesium alloy, it is easy to The cold gap of the bar is large and deep, and even cracks appear on the bar, which leads to the failure of the bar preparation. If the magnesium alloy is returned to the furnace, the recovery rate is extremely low due to the characteristics of the Zr metal in ZK61M.
A certain amount of magnesium-zirconium alloy needs to be re-added. The market price of magnesium-zirconium alloy is generally around 120,000 yuan / ton, which will cause great economic losses to the manufacturer. However, the ZK61M magnesium alloy used in major national projects and intelligent manufacturing industries is currently The urgent need for large-scale products has led to high prices for ZK61M magnesium alloys in the market. Some needs can only be replaced by other series of magnesium alloys with lower tensile strength and yield strength. How to solve the above problems has become a long-term difficult problem. technical challenge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The first step: smelting: preheat the crucible with a specification of φ1000×1800mm in the melting furnace to 180°C, add 12kg of No. The liquid surface forms a protective film isolated from the air. Add high-purity magnesium ingots after the No. 2 solvent melts. When the temperature of the crucible of the melting furnace rises to 760±5°C, add the required magnesium-zirconium alloy with the hopper. The content of zirconium is 30%, and stirred with argon for 10 minutes, when the temperature dropped to 700±5°C, add more than 99.9% of the required zinc ingot, and filled with argon to stir for 10 minutes, after stirring fully and evenly, let it stand for 30 minutes;

[0017] The composition weight percent of each component in the No. 2 solvent is: magnesium chloride 45%, potassium chloride 30%, sodium chloride 20%, barium chloride 5%, and the sum of the above components by weight is 100%. %.

[0018] The second step: an analysis test: samples are taken in the crucible in th...

Embodiment 2

[0023] The first step: smelting: preheat the crucible with a specification of φ1000×1800mm in the melting furnace to 180°C, add 12kg of No. The liquid surface forms a protective film isolated from the air. Add high-purity magnesium ingots after the No. 2 solvent melts. When the temperature of the crucible of the melting furnace rises to 760±5°C, add the required magnesium-zirconium alloy with the hopper. The content of zirconium is 30%, and stirred with argon for 10 minutes, when the temperature dropped to 700±5°C, add more than 99.9% of the required zinc ingot, and filled with argon to stir for 10 minutes, after stirring fully and evenly, let it stand for 30 minutes;

[0024]The composition weight percent of each component in the No. 2 solvent is: magnesium chloride 45%, potassium chloride 30%, sodium chloride 20%, barium chloride 5%, and the sum of the above components by weight is 100%. %.

[0025] The second step: an analysis and test: samples are taken in the crucible in...

Embodiment 3

[0030] The first step: smelting: preheat the crucible with a specification of φ1000×1800mm in the melting furnace to 180°C, add 12kg of No. The liquid surface forms a protective film isolated from the air. Add high-purity magnesium ingots after the No. 2 solvent melts. When the temperature of the crucible of the melting furnace rises to 760±5°C, add the required magnesium-zirconium alloy with the hopper. The content of zirconium is 30%, and stirred with argon for 10 minutes, when the temperature dropped to 700±5°C, add more than 99.9% of the required zinc ingot, and filled with argon to stir for 10 minutes, after stirring fully and evenly, let it stand for 30 minutes;

[0031] The composition weight percent of each component in the No. 2 solvent is: magnesium chloride 45%, potassium chloride 30%, sodium chloride 20%, barium chloride 5%, and the sum of the above components by weight is 100%. %.

[0032] The second step: an analysis test: samples are taken in the crucible in th...

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Abstract

The invention discloses a preparation process of a ZK61M magnesium alloy bar with a diameter of 720 mm. The preparation process comprises the following steps of carrying out smelting, primary analysisand testing, refining, secondary analysis and testing, standing, and semi-continuous casting. According to the preparation process of the ZK61M magnesium alloy bar with the diameter of 720 mm, the production process conditions are strictly controlled, the technical difficulty in the production process is overcome, the production time is shortened, and the production efficiency of the magnesium alloy bar is improved, the production cost is reduced, and the produced finished product can fully meet the requirements of domestic and foreign markets.

Description

technical field [0001] The invention relates to the field of magnesium alloy manufacture and processing, in particular to a preparation process for ZK61M magnesium alloy rods with a diameter of 720 mm. Background technique [0002] ZK61M magnesium alloy is a kind of wrought magnesium alloy. It not only has higher strength, better ductility and more diversified mechanical properties, but also has good corrosion resistance and welding performance compared with other alloys. Although the alloy has relatively poor deformability, it can be made into rods, and products can be obtained by extrusion and forging. Its products are commonly used to make aircraft skins, hatches, siding, robots, etc. [0003] As the usage of ZK61M magnesium alloy increases at an annual rate of 25% in recent years, the existing production process and crystallizer cannot meet the needs of the existing market more and more, and the existing production process has the following problems: 1. During the melt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C1/06C22C23/04B22D11/00
CPCB22D11/001C22C1/03C22C1/06C22C23/04
Inventor 李志军陈培军陈路东
Owner 洛阳晟雅镁合金科技有限公司
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