CN102069173B - Method for preparing low-carbon mixed protective gas for magnesium and magnesium alloy melt - Google Patents
Method for preparing low-carbon mixed protective gas for magnesium and magnesium alloy melt Download PDFInfo
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- CN102069173B CN102069173B CN2011100411467A CN201110041146A CN102069173B CN 102069173 B CN102069173 B CN 102069173B CN 2011100411467 A CN2011100411467 A CN 2011100411467A CN 201110041146 A CN201110041146 A CN 201110041146A CN 102069173 B CN102069173 B CN 102069173B
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Abstract
The invention relates to the technology of magnesium and magnesium alloy melt protection, in particular to a method for preparing low-carbon mixed protective gas for a magnesium and magnesium alloy melt. By the method, the problem that the traditional magnesium and magnesium alloy melt protective gas does not thoroughly protect the magnesium and magnesium alloy melt is solved. The method comprises the following steps of: (1) mixing three kinds of gas, namely HFC-134a, HFC-152a and full ketonic fluorade to prepare main protective gas; and (2) mixing the main protective gas and dry air or dry nitrogen to prepare the final protective gas. The low-carbon mixed protective gas is prepared by the method, effectively solves the problem that the traditional magnesium and magnesium alloy melt protective gas does not thoroughly protect the magnesium and magnesium alloy melt and is applied to the anti-oxidization protection of the magnesium and magnesium alloy melt.
Description
Technical field
The present invention relates to magnesium and magnesium alloy fused mass resist technology, specifically is the preparation method of the low-carbon type hybrid protection gas used of a kind of magnesium and magnesium alloy fused mass.
Background technology
Oxidized for preventing magnesium and magnesium alloy fused mass, adopt protective gas that magnesium and magnesium alloy fused mass are protected usually.At present, the protective gas used of magnesium and magnesium alloy fused mass mainly adopts sulfur hexafluoride (SF6).But the greenhouse effects of sulfur hexafluoride gas are 23900 times of carbon dioxide, and climate change causes and has a strong impact on to the earth, and when temperature is too high, also can decomposite poisonous S2F10 and SF4 on a small quantity, and human body is produced harm.And use single FHC-1341 (HFC-134a) or HC152a (Difluoroethane); When these two kinds of gases carry out anti-oxidation protection to magnesium and magnesium alloy fused mass; Ubiquity is protected halfway problem, promptly adopts existing magnesium and magnesium alloy fused mass protective gas not to form thoroughly effectively protection to magnesium and magnesium alloy fused mass; Based on this, be necessary to invent the preparation method of the low-carbon type hybrid protection gas that a kind of magnesium and magnesium alloy fused mass use.
Summary of the invention
The present invention protects halfway problem in order to solve existing magnesium and magnesium alloy fused mass protective gas, and the preparation method of the low-carbon type hybrid protection gas that a kind of magnesium and magnesium alloy fused mass use is provided.
The present invention adopts following technical scheme to realize: the preparation method of the low-carbon type hybrid protection gas that magnesium and magnesium alloy fused mass are used; This method is to adopt following steps to realize: (1) is with HFC-134a (1; 1,1,2-HFC-134a), HFC-152a (1; The 1-Difluoroethane), three kinds of gases of perfluorinated ketone mix the main protective gas of preparation formation; During mixing, the volume ratio of HFC-134a is 20%-60%, and the volume ratio of HFC-152a is 20%-60%, and the volume ratio of perfluorinated ketone is 10%-30%, and the volume ratio sum of HFC-134a, HFC-152a, perfluorinated ketone is 100%; (2) main protective gas is mixed with dry air or drying nitrogen, preparation forms final protective gas; When main protective gas mixed with dry air, the volume ratio of main protective gas was 0.1%-1%, and the volume ratio of dry air is 99%-99.9%; When main protective gas mixed with drying nitrogen, the volume ratio of main protective gas was 0.1%-2%, and the volume ratio of drying nitrogen is 98%-99.9%.
Can protect magnesium and magnesium alloy fused mass through final protective gas, prevent that magnesium and magnesium alloy fused mass are oxidized; Compare with existing magnesium and magnesium alloy fused mass protective gas; The final protective gas that adopts the preparation method of the low-carbon type hybrid protection gas that magnesium of the present invention and magnesium alloy fused mass use to be prepared from is low-carbon type hybrid protection gas; This low-carbon type hybrid protection gas price is low; Protection effect good than single kind of gas can form thoroughly effectively anti-oxidation protection to magnesium and magnesium alloy fused mass, thereby efficiently solves existing magnesium and the magnesium alloy fused mass protective gas is protected halfway problem.
The present invention prepares low-carbon type hybrid protection gas through adopting brand-new preparation method, efficiently solves existing magnesium and magnesium alloy fused mass protective gas and protects halfway problem, is applicable to the anti-oxidation protection of magnesium and magnesium alloy fused mass.
The specific embodiment
The preparation method of the low-carbon type hybrid protection gas that magnesium and magnesium alloy fused mass are used, this method adopt following steps to realize: HFC-134a, HFC-152a, three kinds of gases of perfluorinated ketone are mixed in (1), and preparation forms main protective gas; During mixing, the volume ratio of HFC-134a is 20%-60%, and the volume ratio of HFC-152a is 20%-60%, and the volume ratio of perfluorinated ketone is 10%-30%, and the volume ratio sum of HFC-134a, HFC-152a, perfluorinated ketone is 100%; (2) main protective gas is mixed with dry air or drying nitrogen, preparation forms final protective gas; When main protective gas mixed with dry air, the volume ratio of main protective gas was 0.1%-1%, and the volume ratio of dry air is 99%-99.9%; When main protective gas mixed with drying nitrogen, the volume ratio of main protective gas was 0.1%-2%, and the volume ratio of drying nitrogen is 98%-99.9%.
Claims (1)
1. the preparation method of the low-carbon type hybrid protection gas used of magnesium and magnesium alloy fused mass; It is characterized in that: this method is to adopt following steps to realize: HFC-134a, HFC-152a, three kinds of gases of perfluorinated ketone are mixed in (1), and preparation forms main protective gas; During mixing, the volume ratio of HFC-134a is 20%-60%, and the volume ratio of HFC-152a is 20%-60%, and the volume ratio of perfluorinated ketone is 10%-30%, and the volume ratio sum of HFC-134a, HFC-152a, perfluorinated ketone is 100%; (2) main protective gas is mixed with dry air or drying nitrogen, preparation forms final protective gas; When main protective gas mixed with dry air, the volume ratio of main protective gas was 0.1%-1%, and the volume ratio of dry air is 99%-99.9%; When main protective gas mixed with drying nitrogen, the volume ratio of main protective gas was 0.1%-2%, and the volume ratio of drying nitrogen is 98%-99.9%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100411467A CN102069173B (en) | 2011-02-21 | 2011-02-21 | Method for preparing low-carbon mixed protective gas for magnesium and magnesium alloy melt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100411467A CN102069173B (en) | 2011-02-21 | 2011-02-21 | Method for preparing low-carbon mixed protective gas for magnesium and magnesium alloy melt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102069173A CN102069173A (en) | 2011-05-25 |
| CN102069173B true CN102069173B (en) | 2012-06-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100411467A Expired - Fee Related CN102069173B (en) | 2011-02-21 | 2011-02-21 | Method for preparing low-carbon mixed protective gas for magnesium and magnesium alloy melt |
Country Status (1)
| Country | Link |
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| CN (1) | CN102069173B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106862536A (en) * | 2017-02-19 | 2017-06-20 | 山东银光钰源轻金属精密成型有限公司 | A kind of novel magnesium alloy gas shield new technology |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1352583A (en) | 1999-04-28 | 2002-06-05 | 铸造中心有限公司 | Cover gas |
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2011
- 2011-02-21 CN CN2011100411467A patent/CN102069173B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1352583A (en) | 1999-04-28 | 2002-06-05 | 铸造中心有限公司 | Cover gas |
Non-Patent Citations (1)
| Title |
|---|
| 陈虎魁等.HFC-134a气体在保护镁及合金熔体过程中的分解行为.<<铸造技术>>.2008,第29卷(第1期),第59-63页. * |
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| CN102069173A (en) | 2011-05-25 |
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Granted publication date: 20120627 Termination date: 20130221 |