CN102251128A - Smelting technology of magnesium alloy - Google Patents
Smelting technology of magnesium alloy Download PDFInfo
- Publication number
- CN102251128A CN102251128A CN 201010175367 CN201010175367A CN102251128A CN 102251128 A CN102251128 A CN 102251128A CN 201010175367 CN201010175367 CN 201010175367 CN 201010175367 A CN201010175367 A CN 201010175367A CN 102251128 A CN102251128 A CN 102251128A
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- CN
- China
- Prior art keywords
- magnesium alloy
- temperature
- smelting
- smelting furnace
- az91d
- Prior art date
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- 238000003723 Smelting Methods 0.000 title claims abstract description 65
- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 60
- 238000005516 engineering process Methods 0.000 title claims abstract description 24
- 238000005266 casting Methods 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 235000014347 soups Nutrition 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 11
- 238000010792 warming Methods 0.000 claims description 9
- 230000004907 flux Effects 0.000 claims description 8
- 238000007670 refining Methods 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 238000007872 degassing Methods 0.000 claims description 4
- 238000010907 mechanical stirring Methods 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 abstract description 12
- 230000007797 corrosion Effects 0.000 abstract description 12
- 239000012535 impurity Substances 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract 4
- 239000002994 raw material Substances 0.000 abstract 1
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 238000005530 etching Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910052761 rare earth metal Inorganic materials 0.000 description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a smelting technology of a magnesium alloy. The smelting technology is suitable for smelting a magnesium alloy AZ91D. The smelting technology comprises the following steps of 1) heating to smelting a magnesium alloy AZ91D raw material, 2) standing liquid melt obtained from the step 1 with cooling, wherein a temperature of the liquid melt is controlled within a range of 610 to 650 DEG C, 3) standing the liquid melt obtained from the step 2 with heating, wherein a temperature of the liquid melt is controlled within a range of 670 to 720 DEG C, and 4) carrying out a casting process for producing ingot castings. The smelting technology of a magnesium alloy can reduce greatly impurity elements without raising cost, thus can improve greatly a corrosion resistance of a magnesium alloy AZ91D.
Description
[technical field]
The present invention relates to a kind of smelting technology of magnesium alloy, be specifically related to a kind of smelting technology of the AZ9 of raising 1D corrosion stability of magnesium alloy.
[background technology]
The chemically reactive height of magnesium, therefore micro-cell corrosion very easily takes place in the alloy based on magnesium, and especially its solidity to corrosion of magnesium alloy of exceeding standard of impurity contents such as iron, nickel, copper is poorer.The AZ91D magnesium alloy is the most widely used class magnesium alloy, it has excellent castability and good room-temperature mechanical property, but the solidity to corrosion difference of AZ91D magnesium alloy has hindered the AZ91D magnesium alloy to be used widely, although occurred the prescription of more high corrosion resistance magnesium alloy at present, it is by adding the solidity to corrosion of rare earth element raising AZ91D magnesium alloy.Though add the solidity to corrosion that rare earth element helps improving the AZ91D magnesium alloy, rare earth element has improved cost on the one hand, on the other hand because rare earth element fusing point height can cause the flowability of AZ91D magnesium alloy to descend.
In view of this, be necessary to develop a kind of smelting technology of magnesium alloy in fact, the smelting technology of this magnesium alloy is applied to the smelting to the AZ91D magnesium alloy, and it has significantly improved the solidity to corrosion of AZ91D magnesium alloy under the prerequisite that does not raise the cost.
[summary of the invention]
Therefore, the purpose of this invention is to provide a kind of smelting technology of magnesium alloy, the smelting technology of this magnesium alloy is applied to the smelting to the AZ91D magnesium alloy, and it has significantly improved the solidity to corrosion of AZ91D magnesium alloy under the prerequisite that does not raise the cost.
In order to achieve the above object, the smelting technology of magnesium alloy of the present invention is applied to the smelting to the AZ91D magnesium alloy, and it comprises the steps:
(1) with the former material heating of AZ91D magnesium alloy melting, the former material of this AZ91D magnesium alloy is that batchings such as compression casting waste material or pure magnesium are formed;
(2) the molten soup after the above-mentioned melting is lowered the temperature leave standstill, its temperature is controlled between 610 ℃～650 ℃;
(3) the molten soup after cooling is left standstill heats up and leaves standstill, and its temperature is controlled between 670 ℃～720 ℃;
(4) carry out the casting of ingot casting.
Preferable, above-mentioned steps (1) comprises the steps:
(a) smelting furnace is warming up to 750 ℃ from room temperature;
(b) when temperature of smelting furnace is 750 ℃, in smelting furnace, throw in the former material of AZ91D magnesium alloy, after former material all melted, adjusting temperature of smelting furnace was 730 ℃;
(c) when temperature of smelting furnace is 730 ℃, molten soup is carried out mechanical stirring and in molten soup, adds flux and carry out refining;
When (d) temperature of smelting furnace is warming up to 760 ℃, in molten soup, feed N
2And adding flux carries out the degasification refining.Compared to prior art, the smelting technology of magnesium alloy of the present invention has significantly improved the solidity to corrosion of AZ91D magnesium alloy under the prerequisite that does not raise the cost.
[description of drawings]
Fig. 1 illustrates the flow chart of steps of the smelting technology of magnesium alloy of the present invention.
Fig. 2 illustrates the process route chart of first embodiment of the invention.
Fig. 3 illustrates the process route chart of second embodiment of the invention.
[embodiment]
The present invention is further elaborated below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.
First embodiment
See also Fig. 1, shown in Figure 2, it illustrates the flow chart of steps of the smelting technology of magnesium alloy of the present invention, the process route chart of first embodiment of the invention respectively.In first embodiment, adopt QR2-30 type smelting furnace (18 kilograms in fusible AZ91D magnesium alloy), the former material of AZ91D magnesium alloy is the AZ91D magnesium alloy compression casting waste material, its processing step is as follows:
Step 101:(a) smelting furnace is warming up to 750 ℃ from room temperature, needs 60 minutes approximately; (b) when temperature of smelting furnace is 750 ℃, in smelting furnace, throw in the AZ91D magnesium alloy compression casting waste material, after former material all melted, adjusting temperature of smelting furnace was 730 ℃, needs 60 minutes approximately; (c) when temperature of smelting furnace is 730 ℃, need molten soup to be carried out mechanical stirring in 20 minutes approximately and in molten soup interpolation flux carry out refining; When (d) temperature of smelting furnace is warming up to 760 ℃, in molten soup, feed N
2And add flux and carry out the degasification refining, need 30 minutes approximately;
Step 102: with smelting furnace outage, the molten soup after the above-mentioned melting lowered the temperature leave standstill, temperature of smelting furnace is reduced to 620 ℃ from 760 ℃, needs 80 minutes approximately;
Step 103: the molten soup after above-mentioned cooling left standstill heats up and leaves standstill, and temperature of smelting furnace rises to 710 ℃ from 620 ℃, needs 30 minutes approximately;
Step 104: when temperature of smelting furnace during, carry out the casting of ingot casting, need finish in 30 minutes the smelting of AZ91D magnesium alloy approximately at 710 ℃.
In first embodiment, will adopt the AZ91D magnesium alloy ingot of the smelting technology preparation of this magnesium alloy, carry out the salt fog contrast test after polishing with commercial AZ9 1D magnesium alloy ingot product section.The result is as shown in table 1:
Table 1: embodiment 1 test result
| Alloy designations | 2 hours post-etching areas of SaltSprayTest accounting | 4 hours post-etching areas of SaltSprayTest accounting |
| Commercial AZ91D | 15％ | 25％ |
| Embodiment 1-AZ91D | 0％ | 10％ |
Second embodiment
See also Fig. 1, shown in Figure 3, it illustrates the flow chart of steps of the smelting technology of magnesium alloy of the present invention, the process route chart of second embodiment of the invention respectively.In second embodiment, adopt QR2-150 type smelting furnace (110 kilograms in fusible AZ91D magnesium alloy), the former material of AZ91D magnesium alloy is the AZ91D magnesium alloy compression casting waste material, its processing step is as follows:
Step 201:(e) smelting furnace is warming up to 750 ℃ from room temperature, needs 60 minutes approximately; (f) when temperature of smelting furnace is 750 ℃, in smelting furnace, throw in the AZ91D magnesium alloy compression casting waste material, after former material all melted, adjusting temperature of smelting furnace was 730 ℃, needed 120 minutes approximately; (g) when temperature of smelting furnace is 730 ℃, need molten soup to be carried out mechanical stirring in 20 minutes approximately and in molten soup interpolation flux carry out refining; When (h) temperature of smelting furnace is warming up to 760 ℃, needed 30 fens to feed N in the molten soup of clockwise approximately
2And adding flux carries out the degasification refining;
Step 202: with smelting furnace outage, the molten soup after the above-mentioned melting lowered the temperature leave standstill, temperature of smelting furnace is reduced to 640 ℃ from 760 ℃, needs 120 minutes approximately;
Step 203: the molten soup after above-mentioned cooling left standstill heats up and leaves standstill, and temperature of smelting furnace is warming up to 690 ℃ from 640 ℃, needs 30 minutes approximately;
Step 204: when temperature of smelting furnace during, carry out the casting of ingot casting, need finish in 80 minutes the smelting of AZ91D magnesium alloy approximately at 690 ℃.
In second embodiment, will adopt the AZ91D magnesium alloy ingot of the smelting technology preparation of this magnesium alloy, carry out the salt fog contrast test after polishing with commercial AZ9 1D magnesium alloy ingot product section.The result is as shown in table 2:
Table 2: embodiment 2 test results
| Alloy designations | 4 hours post-etching areas of SaltSprayTest accounting | 8 hours post-etching areas of SaltSprayTest accounting |
| Commercial AZ91D | 25％ | 30％ |
| Embodiment 2-AZ91D | 2％ | 5％ |
Compared to prior art, the smelting technology of magnesium alloy of the present invention is under the prerequisite that does not raise the cost, and impurity element can significantly reduce, thereby has significantly improved the solidity to corrosion of AZ91D magnesium alloy.
Claims (2)
1. the smelting technology of a magnesium alloy is applied to the smelting to the AZ91D magnesium alloy, it is characterized in that, the smelting technology of this magnesium alloy comprises the steps:
(1) with the former material heating of AZ91D magnesium alloy melting;
(2) the molten soup after the above-mentioned melting is lowered the temperature leave standstill, its temperature is controlled between 610 ℃～650 ℃;
(3) the molten soup after cooling is left standstill heats up and leaves standstill, and its temperature is controlled between 670 ℃～720 ℃;
(4) carry out the casting of ingot casting.
2. the smelting technology of magnesium alloy according to claim 1 is characterized in that, above-mentioned steps (1) comprises the steps:
(a) smelting furnace is warming up to 750 ℃ from room temperature;
(b) when temperature of smelting furnace is 750 ℃, in smelting furnace, throw in the former material of AZ91D magnesium alloy, after former material all melted, adjusting temperature of smelting furnace was 730 ℃;
(c) when temperature of smelting furnace is 730 ℃, molten soup is carried out mechanical stirring and in molten soup, adds flux and carry out refining;
When (d) temperature of smelting furnace is warming up to 760 ℃, in molten soup, feed N
2And adding flux carries out the degasification refining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010175367 CN102251128B (en) | 2010-05-18 | 2010-05-18 | Smelting technology of magnesium alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010175367 CN102251128B (en) | 2010-05-18 | 2010-05-18 | Smelting technology of magnesium alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102251128A true CN102251128A (en) | 2011-11-23 |
| CN102251128B CN102251128B (en) | 2013-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010175367 Expired - Fee Related CN102251128B (en) | 2010-05-18 | 2010-05-18 | Smelting technology of magnesium alloy |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111719074A (en) * | 2020-07-20 | 2020-09-29 | 哈尔滨吉星机械工程有限公司 | Preparation method for high-entropy alloy particle reinforced magnesium-based composite lost foam casting |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101368236A (en) * | 2008-09-01 | 2009-02-18 | 李扬德 | Solvent-free waste magnesium on-site remelting refining reutilization process |
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- 2010-05-18 CN CN 201010175367 patent/CN102251128B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101368236A (en) * | 2008-09-01 | 2009-02-18 | 李扬德 | Solvent-free waste magnesium on-site remelting refining reutilization process |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111719074A (en) * | 2020-07-20 | 2020-09-29 | 哈尔滨吉星机械工程有限公司 | Preparation method for high-entropy alloy particle reinforced magnesium-based composite lost foam casting |
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| CN102251128B (en) | 2013-02-06 |
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