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CN102400021A - Formula for improving fluidity of magnesium alloy - Google Patents

Formula for improving fluidity of magnesium alloy Download PDF

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Publication number
CN102400021A
CN102400021A CN2010102756566A CN201010275656A CN102400021A CN 102400021 A CN102400021 A CN 102400021A CN 2010102756566 A CN2010102756566 A CN 2010102756566A CN 201010275656 A CN201010275656 A CN 201010275656A CN 102400021 A CN102400021 A CN 102400021A
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CN
China
Prior art keywords
magnesiumalloy
prescription
mobile
az91d
raising
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2010102756566A
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Chinese (zh)
Inventor
马跃群
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitac Precision Technology Kunshan Ltd
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Mitac Precision Technology Kunshan Ltd
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Publication date
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Priority to CN2010102756566A priority Critical patent/CN102400021A/en
Publication of CN102400021A publication Critical patent/CN102400021A/en
Pending legal-status Critical Current

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Abstract

A formula for improving the fluidity of magnesium alloy comprises the following components in parts by weight: 9.5 to 10.5% of aluminum , 0.5 to 1.0% of zinc (Zn), 0.1 to 0.5% of manganese (Mn), 0.0005 to 0.0015% of beryllium (Be), 0.01 to 0.15% of strontium (Sr), and the balance of magnesium (Mg). The formula improves the fluidity of the magnesium alloy and the yield of die-casting products.

Description

Improve the mobile prescription of magnesiumalloy
[technical field]
The invention relates to a kind of magnesium alloy formula, particularly can effectively improve the mobile prescription of AZ91D magnesiumalloy relevant for a kind of.
[background technology]
Magnesiumalloy is widely used on the casing of notebook computer owing to have lightweight, outstanding die casting and machining property, electromagnetic wave shielding and be easy to advantage such as recovery.Though the magnesiumalloy trade mark AZ91D of main flow can satisfy the die cast requirement of most of workpiece, along with the more and more frivolous requirement of notebook computer, AZ91D also runs into increasing challenge.For example, more thin-walled (≤when 0.8mm) workpiece was with the AZ91D moulding, yield declined to a great extent, and ordered about the high workability magnesiumalloy of research staff's development of new, under the prerequisite that does not reduce the AZ91D mechanical property, further improved its mobile and moulding filling capacity.In the high workability magnesiumalloy patent of China and foreign countries applications, compare AZ91D commonly used, the mechanical property that has descends too much, and the cost that has is too high, does not all have a practical value, is necessary that therefore further exploitation has more the high workability magnesiumalloy of industrial application potentiality.
For example, U.S. Patent number is mobile excellent magnesiumalloy and material thereof described in the patent of US 6582533, improves flowability through the content that improves aluminium and silicon, and the alloy unit elongation descends a lot, satisfied not the requirement of notebook product to plasticity; On AZ91D alloy basis, to have added Ca/Sr/ mishmetal etc. element modified for the patent of ZL 200610025394 for Chinese patent number, and wherein the element addition of embodiment is too much, has significantly improved the manufacturing cost of these alloys.
[summary of the invention]
In view of this; The purpose of this invention is to provide a kind of mobile prescription of magnesiumalloy that improves; To be implemented under the prerequisite that does not reduce magnesiumalloy mechanical property and manufacturing cost raising; The flowability of AZ91D magnesiumalloy has been improved >=20%, with respect to the AZ91D alloy make the yield of die-cast product improved >=50%.
In order to achieve the above object, the prescription that raising magnesiumalloy of the present invention is mobile, its composition fraction representation by weight comprises:
Aluminium (Al) 9.5~10.5%
Zinc (Zn) 0.5~1.0%
Manganese (Mn) 0.1~0.5%
Beryllium (Be) 0.0005~0.0015%
Strontium (Sr) 0.01~0.15%
Magnesium (Mg) surplus.
In the preferred embodiment, the mobile prescription of above-mentioned raising magnesiumalloy also comprises: mishmetal (RE) 0.01~0.2%.
Compared to prior art; The prescription that raising magnesiumalloy of the present invention is mobile; Compared to existing AZ91D alloy; Under the prerequisite that does not reduce magnesiumalloy mechanical property and manufacturing cost raising≤10%, the flowability of AZ91D magnesiumalloy has been improved>=20%, the yield of die-cast product has been improved>=50%.
[embodiment]
Further specify the present invention through embodiment below.
Embodiment 1
The prescription parts by weights array of magnesiumalloy of the present invention becomes to comprise:
Aluminium (Al) 10.2%
Zinc (Zn) 0.6%
Manganese (Mn) 0.28%
Strontium (Sr) 0.12%
Beryllium (Be) 0.0008%
Magnesium (Mg) surplus.
Wherein, Also comprise a small amount of unavoidable impurities, as: individual event foreign matter content≤0.025%, content of impurities≤0.05%; Simultaneously; Strontium (Sr) is the surface active element of magnesiumalloy, thereby has the molten soup viscosity of reduction to improve the mobile effect of molten soup, and strontium (Sr) also has the effect of grain refining and raising plasticity.
Above-mentioned formula materials adopts QR2-150 type smelting furnace to carry out refinery process, raw material is fed in 750 ℃ the smelting furnace, and transferring to temperature of smelting furnace after the fusing is 730 ℃ (needing 120 minutes approximately), on one side the molten soup of mechanical stirring, add flux on one side and carry out refining (needing 20 minutes approximately); Under 760 ℃ of the temperature of smelting furnace, through feeding N 2Gas, and add flux, this flux is the RJ-2 flux among the aircraft industry standard HB/Z5123-79, carries out degasification refining (needing 30 minutes approximately); Smelting furnace is cut off the power supply, molten soup is lowered the temperature leave standstill, 760 ℃~610 ℃ of control temperature of smelting furnace need 120 minutes approximately; When alloy is cooled to 720 ℃, get the molten soup mobile sample of casting; After completion was left standstill in above-mentioned cooling, 610 ℃~710 ℃ of control temperature of smelting furnace needed 30 minutes approximately; 710 ℃ of control temperature of smelting furnace carry out the casting of ingot casting, need 80 minutes approximately; Produce product, the above-mentioned product of producing is carried out flowability and measuring mechanical property, test result such as table 1, table 2 are said:
Table 1. embodiment 1 contrasts with the flowability of AZ91D alloy
Alloy species Mobile specimen length (cm) Relative AZ91D increase rate
AZ91D 66 0.0%
Present embodiment 1 80.2 21.5%
Table 2. embodiment 1 contrasts with the mechanical property of AZ91D alloy
Figure BDA0000025881560000021
Figure BDA0000025881560000031
Embodiment 2
The prescription parts by weights array of magnesiumalloy of the present invention becomes to comprise:
Aluminium (Al) 9.8%
Zinc (Zn) 0.7%
Manganese (Mn) 0.32%
Strontium (Sr) 0.01%
Cerium-rich mischmetal (RE) 0.15%
Beryllium (Be) 0.0009%
Magnesium (Mg) surplus.
Wherein, also comprise a small amount of unavoidable impurities, as: individual event foreign matter content≤0.025%, content of impurities≤0.05%.Cerium-rich mischmetal (RE) is the surface active element of magnesiumalloy, have to reduce molten soup viscosity and help the stream effect, and cerium-rich mischmetal (RE) has modifying-refining and the effect that improves plasticity.
Above-mentioned formula materials adopts QR2-150 type smelting furnace to carry out refinery process, raw material is fed in 750 ℃ the smelting furnace, and transferring to temperature of smelting furnace after the fusing is 730 ℃ (needing 120 minutes approximately), on one side the molten soup of mechanical stirring, add flux on one side and carry out refining (needing 20 minutes approximately); Under 760 ℃ of the temperature of smelting furnace, through feeding N 2Gas, and add flux, carry out degasification refining (needing 30 minutes approximately); Smelting furnace is cut off the power supply, molten soup is lowered the temperature leave standstill, 760 ℃~610 ℃ of control temperature of smelting furnace need 120 minutes approximately; When alloy is cooled to 720 ℃, get the molten soup mobile sample of casting; After completion was left standstill in above-mentioned cooling, 610 ℃~710 ℃ of control temperature of smelting furnace needed 30 minutes approximately; 710 ℃ of control temperature of smelting furnace carry out the casting of ingot casting, need 80 minutes approximately; Produce product, the above-mentioned product of producing is carried out flowability and measuring mechanical property, test result such as table 3, table 4 are said:
Table 3. embodiment 2 contrasts with the flowability of AZ91D alloy
Alloy species Mobile specimen length (cm) Relative AZ91D increase rate
AZ91D 66 0.0%
Present embodiment 2 79.8 20.9%
Table 4. embodiment 2 contrasts with the mechanical property of AZ91D alloy
Figure BDA0000025881560000032
Compared to prior art; The prescription that raising magnesiumalloy of the present invention is mobile; Compared to existing AZ91D alloy; Under the prerequisite that does not reduce magnesiumalloy mechanical property and manufacturing cost raising≤10%, the flowability of AZ91D magnesiumalloy has been improved>=20%, the yield of die-cast product has been improved>=50%.

Claims (5)

1. one kind is improved the mobile prescription of magnesiumalloy, it is characterized in that its composition fraction representation by weight comprises:
Aluminium (Al) 9.5~10.5%
Zinc (Zn) 0.5~1.0%
Manganese (Mn) 0.1~0.5%
Beryllium (Be) 0.0005~0.0015%
Strontium (Sr) 0.01~0.15%
Magnesium (Mg) surplus.
2. the prescription that raising magnesiumalloy as claimed in claim 1 is mobile is characterized in that, also comprises a small amount of unavoidable impurities, as: individual event foreign matter content≤0.025%, content of impurities≤0.05%.
3. the prescription that raising magnesiumalloy as claimed in claim 1 is mobile is characterized in that in the preferred embodiment, the composition of this prescription fraction representation by weight comprises:
Aluminium (Al) 10.2%
Zinc (Zn) 0.6%
Manganese (Mn) 0.28%
Strontium (Sr) 0.12%
Beryllium (Be) 0.0008%
Magnesium (Mg) surplus.
4. the prescription that raising magnesiumalloy as claimed in claim 1 is mobile, it is characterized in that this prescription also comprises: mishmetal (RE), its weight fraction are 0.01~0.2%.
5. the prescription that raising magnesiumalloy as claimed in claim 4 is mobile is characterized in that in the preferred embodiment, the composition of this prescription fraction representation by weight comprises:
Aluminium (Al) 9.8%
Zinc (Zn) 0.7%
Manganese (Mn) 0.32%
Strontium (Sr) 0.01%
Cerium-rich mischmetal (RE) 0.15%
Beryllium (Be) 0.0009%
Magnesium (Mg) surplus.
CN2010102756566A 2010-09-08 2010-09-08 Formula for improving fluidity of magnesium alloy Pending CN102400021A (en)

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Publications (1)

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CN102400021A true CN102400021A (en) 2012-04-04

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105220048A (en) * 2015-11-03 2016-01-06 苏州云海镁业有限公司 A kind of high workability magnesium alloy and production technique thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1266105A (en) * 2000-03-29 2000-09-13 上海交通大学 Heat-resistant flame-retarded compression casting magnesium alloy and smelting cast technology thereof
US6139651A (en) * 1998-08-06 2000-10-31 Dead Sea Magnesium Ltd Magnesium alloy for high temperature applications
US20010026768A1 (en) * 2000-03-03 2001-10-04 Tadayoshi Tukeda Magnesium alloys excellent in fluidity and materials thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6139651A (en) * 1998-08-06 2000-10-31 Dead Sea Magnesium Ltd Magnesium alloy for high temperature applications
US20010026768A1 (en) * 2000-03-03 2001-10-04 Tadayoshi Tukeda Magnesium alloys excellent in fluidity and materials thereof
CN1266105A (en) * 2000-03-29 2000-09-13 上海交通大学 Heat-resistant flame-retarded compression casting magnesium alloy and smelting cast technology thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105220048A (en) * 2015-11-03 2016-01-06 苏州云海镁业有限公司 A kind of high workability magnesium alloy and production technique thereof

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Application publication date: 20120404