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Covering flux of vitrous body of magnesium alloy and manufacturing method

A technology covering flux and production methods, which is applied in the field of metal materials and metallurgy, can solve the problems of inability to meet protection requirements, low flux slagging ability, poor separation of magnesium melt, etc., to achieve enhanced protection effect, oxidation inclusion and porosity reduction , the effect of not easy flux inclusion

Inactive Publication Date: 2006-01-11
SHANGHAI LIGHT ALLOY NET FORMING NAT ENG RES CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual production and research, the magnesium melt sometimes needs to be heated to a high temperature of 760-800°C. If there is no good protection, the magnesium melt at this time will suffer from gas absorption and oxidation, and even burn violently. The protection effect of series fluxes at high temperature of 760-800℃ is extremely poor and cannot meet the protection requirements
In addition, RJ series fluxes have low slagging ability and poor separation from magnesium melt, so they are easily wrapped in magnesium melt to form flux inclusions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Magnesium alloy glass covering flux composition (mass percentage): 65% magnesium chloride (MgCl 2 ), 10% potassium chloride (KCl), 10% sodium chloride (NaCl), 3% calcium chloride (CaCl 2 ), 3% calcium fluoride (CaF 2 ), 2% magnesium oxide (MgO), 6% cryolite (Na 3 AlF 6 ), 1% boron oxide (B 2 o 3 ).

[0014] The production method of the flux covering the magnesium alloy glass body is as follows: after the crucible is heated to about 350 ° C, magnesium chloride, potassium chloride, sodium chloride, calcium chloride, magnesium oxide and cryolite are added, and after the temperature is partially melted, fluoride is added. Calcium and boron oxide are heated up to about 770°C, stirred evenly, and poured into blocks. After crushing, put it into a ball mill and grind it into powder, and sieve it with a No. 20 sieve. Prepared flux should be put into airtight container for standby.

[0015] When in use, add industrial pure magnesium or magnesium alloy to the industrial ma...

Embodiment 2

[0017] Magnesium alloy glass covering flux composition (mass percentage): 50% magnesium chloride (MgCl 2 ), 20% potassium chloride (KCl), 10% sodium chloride (NaCl), 2% calcium chloride (CaCl 2 ), 9% calcium fluoride (CaF 2 ), 2% magnesium oxide (MgO), 2% cryolite (Na 3 AlF 6 ), 5% sodium borate (Na 2 B 4 o 7 ).

[0018] The production method of the flux covering the magnesium alloy glass body is as follows: after the crucible is heated to about 350 ° C, magnesium chloride, potassium chloride, sodium chloride, calcium chloride, magnesium oxide and cryolite are added, and after the temperature is partially melted, fluoride is added. Calcium and sodium borate, heat up to about 790°C, stir evenly, and cast into blocks. After crushing, put it into a ball mill and grind it into powder, and sieve it with a No. 30 sieve. Prepared flux should be put into airtight container for standby.

[0019] When in use, add industrial pure magnesium or magnesium alloy to the industrial ma...

Embodiment 3

[0021] Magnesium alloy glass covering flux composition (mass percentage): 45% magnesium chloride (MgCl 2 ), 10% potassium chloride (KCl), 20% sodium chloride (NaCl), 10% calcium chloride (CaCl 2 ), 3% calcium fluoride (CaF 2 ), 8% magnesium oxide (MgO), 2% cryolite (Na 3 AlF 6 ), 1% boron oxide (B 2 o 3 ), 1% sodium borate (Na 2 B 4 o 7 ).

[0022] The production method of the flux covering the magnesium alloy glass body is as follows: after the crucible is heated to about 360 ° C, magnesium chloride, potassium chloride, sodium chloride, calcium chloride, magnesium oxide and cryolite are added, and after the temperature is partially melted, fluoride is added. Calcium, boron oxide and sodium borate are heated up to about 780°C, stirred evenly, and poured into blocks. After crushing, put it into a ball mill and grind it into powder, and sieve it with a No. 40 sieve. Prepared flux should be put into airtight container for standby.

[0023] When in use, add industrial p...

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Abstract

This invention provided a Mg alloy glass covering flux and its production method. The mass percentage sphere of the flux chemical composition is: MgCl 45-65%, KCL10-22%, NaCl10-22%, CaCl2 2-10%, CaF3-10%, MgO2-8%, cryolite: 2-6%, glass agent 0.5-5%, among which, the glass agent is boric oxide / or sodium borate. The flux is in glass state under high temperature and no crack appears in the stirred solution in the Mg melt so that it increase the protection effect for over 3.5 hours.

Description

technical field [0001] The invention relates to a magnesium alloy vitreous body covering flux and a production method thereof. A magnesium alloy covering flux which is vitreous during use and has a long acting time is produced to prevent oxidation and combustion during the smelting process of the magnesium alloy. It belongs to the field of metal materials and metallurgy. Background technique [0002] Magnesium alloy is the lightest metal structural material in practical application, and has the characteristics of low density, high specific strength and rigidity, good vibration damping, strong electromagnetic shielding ability and easy recycling. Since the 1990s, industrially developed countries have attached great importance to the research and development of magnesium alloys, and magnesium alloys have been widely used in the fields of national defense, aerospace, automobiles and electronic information industries, and have very broad market prospects. [0003] However, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C1/02
Inventor 吴国华卢晨丁文江
Owner SHANGHAI LIGHT ALLOY NET FORMING NAT ENG RES CENT
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