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Preparation process of ME20M magnesium alloy flat ingot

A preparation process and magnesium alloy technology, applied in the field of preparation technology of ME20M magnesium alloy slab, can solve the problems of burning loss, inability to improve the metal quality and the actual yield of alloy components, and easy oxidation.

Active Publication Date: 2018-07-24
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

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a preparation process for ME20M magnesium alloy slabs. The process of the present invention can solve the problem of easy oxidation and serious burning loss in the production process of existing magnesium alloys. Second, it can solve the problem of smelting Metal cerium is easy to lose during the process, which cannot improve the metal quality and the actual yield of alloy components. The third is that the process of the present invention can produce large-scale ME20M magnesium alloy ingots

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The steps of the preparation process flow are: melting in a melting furnace → primary analytical test → refining in a refining furnace → secondary analytical test → standing, semi-continuous casting.

[0021] The first step is to melt the melting furnace: first clean the used power frequency crucible boiler, the specification of the melting crucible is 1000×2000mm, then preheat the melting crucible to 200°C, add 50kg of No. 5 solvent, and at the same time Add 1900kg of high-purity magnesium ingots of more than 99.9%, and then start to heat up. When the temperature rises to 780℃, add 50kg of electrolytic metal manganese. While adding electrolytic metal manganese, fill with argon and stir. The manganese addition process takes 27-32min. After the manganese metal is added, continue to fill with argon and stir for another 9-10 minutes, and then start to cool down. When the temperature of the magnesium alloy liquid drops to 750°C, add 70kg of metallic cerium, fill with argon and ...

Embodiment 2

[0030] The steps of the preparation process flow are: melting in a melting furnace → primary analytical test → refining in a refining furnace → secondary analytical test → standing, semi-continuous casting.

[0031] The first step is to melt the melting furnace: first clean the used power frequency crucible boiler, the specification of the melting crucible is 1000×2000mm, then preheat the melting crucible to 200°C, add 50kg of No. 5 solvent, and at the same time Add 1900kg of high-purity magnesium ingots above 99.9%, and then start to heat up. When the temperature rises to 780℃, add 50kg of electrolytic metal manganese. While adding electrolytic metal manganese, fill with argon and stir. The manganese addition process takes 28-30 minutes. After the metal manganese is added, continue to fill with argon and stir for another 9-10 minutes, and then start to cool down. When the temperature of the magnesium alloy liquid drops to 750°C, add 70kg of metallic cerium, and fill with argon to...

Embodiment 3

[0040] The steps of the preparation process flow are: melting in a melting furnace → primary analytical test → refining in a refining furnace → secondary analytical test → standing, semi-continuous casting.

[0041] The first step is to melt the melting furnace: first clean the used power frequency crucible boiler, the specification of the melting crucible is 1000×2000mm, then preheat the melting crucible to 200°C, add 50kg of No. 5 solvent, and at the same time Add 1900kg of high-purity magnesium ingots above 99.9%, and then start to heat up. When the temperature rises to 780℃, add 50kg of electrolytic metal manganese. While adding electrolytic metal manganese, fill with argon for stirring. The manganese addition process takes 26 to 33 minutes. After the metal manganese is added, continue to fill with argon and stir for 10-11 minutes, and then start to cool down. When the temperature of the magnesium alloy liquid drops to 750°C, add 70kg of metal cerium, and fill with argon to co...

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Abstract

The invention discloses a preparation process of a ME20M magnesium alloy flat ingot. The preparation process comprises the flow steps of melting by a melting furnace-primary analysis and test-refiningby a refining furnace-secondary analysis and test-standing and semicontinuous casting; a crystallizer is reasonably designed; the temperature and the flowing speed of magnesium alloy liquid guided inthe crystallizer are accurately mastered; such phenomenon as easy fire leakage in the casting process of the ME20M magnesium alloy flat ingot and influence on the product quality by weak fluidity ofthe magnesium alloy liquid in the crystallizer and easy generation of large cold shut is overcome; fifth solvent can prevent oxide inclusions in the smelting process of a ME20M magnesium alloy; the utilization rate of metal cerium is increased; a protective film isolated from air can be formed on the surface of magnesium alloy liquid; and self preparation of a refining agent achieves the followingpurposes: (1) the effects of the fifth solvent are achieved; and (2) impurities in the magnesium alloy liquid are fully precipitated to guarantee that the cast magnesium alloy flat ingot has no defects of inclusions and air holes.

Description

Technical field [0001] The invention relates to the field of manufacture and extension processing of magnesium alloys, in particular to a preparation process of ME20M magnesium alloy slabs. Background technique [0002] At present, ME20M (MB8) magnesium alloy is a kind of wrought magnesium alloy. Due to the presence of metallic cerium (0.15% to 0.35%), the alloy can refine grains, inhibit the formation of twins, and is beneficial to yield strength. (Especially the increase in compression yield strength) is suitable for processing structural parts that bear longitudinal bending loads. In addition, cerium (Ce) also improves heat resistance. ME20M magnesium alloy can be used for a long time below 200°C. At the same time, the alloy has high corrosion resistance, low SCC tendency, and is easy to weld. It is a deformed magnesium alloy that is used more. Plates can be used to manufacture aircraft skins, wall panels and internal parts; die forgings can be used to manufacture components ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/00B22D7/00B22D21/04C22C1/06C22C23/00
CPCB22D7/005B22D11/001B22D21/007C22C1/06C22C23/00
Inventor 陈培军李志军陈路东
Owner 洛阳晟雅镁合金科技有限公司
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