CN100424209C - High-temp, creeping resistant compression casting magnesium alloy - Google Patents
High-temp, creeping resistant compression casting magnesium alloy Download PDFInfo
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- CN100424209C CN100424209C CNB031270638A CN03127063A CN100424209C CN 100424209 C CN100424209 C CN 100424209C CN B031270638 A CNB031270638 A CN B031270638A CN 03127063 A CN03127063 A CN 03127063A CN 100424209 C CN100424209 C CN 100424209C
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Abstract
The present invention relates to a novel compression casting magnesium alloy with high-temperature resistance and creep resistance. An Mg-Al-Zn-Y(Nd) alloy with good creep-resistance performance is obtained by a Mg-rare earth master alloy and comprises the components by the weight portion: 8.0 to 9.5 of Al, 0.45 to 0.90 of Zn and 0.5 to 3.0 of Y(Nd), and moreover, the rest part is composed of Mg and inevitable impurities. The alloy melt can be simply processed without the influence on the compression casting characteristics of the alloy, and moreover, the alloy has good technical property, is easy for popularization and usage and satisfies stable operation under the conditions of the temperature of 150 DEG C and the pressure of 50MPa, and the highest cost of the alloy does not exceed 15% of the cost of an AZ91HP alloy. The magnesium alloy is suitable for scale commercial production and has excellent market potential.
Description
Technical field:
The present invention relates to a kind of diecast magnesium alloy, particularly relate to a kind of novel anti high temperature creep diecast magnesium alloy.Mainly be the lightweight magnesium alloy member that uses as auto parts, and be the Hpdc magnesium alloy.
Background technology:
Magnesium is as the lightest engineering metal material (density 1.8g/cm
3Be 2/3 of aluminium, steel 1/4), has light specific gravity, specific tenacity and specific rigidity height, damping and amortization and machinability are good, thermal conductivity is good, the electromagnetic shielding ability is strong and vibration damping is good and be easy to the character of a series of uniquenesses such as reclaiming, satisfied aviation, space flight, Hyundai Motor industry is to loss of weight, requirements of saving energy, and alternative engineering plastics are to satisfy 3C (computer, communication, consumer electronics) product is light, thin, miniaturization, the requirement of high integration and environmental protection aspect, become the preferred material of Hyundai Motor and 3C industry, be described as " the green engineering material of 21 century ".But also exist at present the difficult point that awaits the technical elements that solves in a large number and restricting the further application of diecast magnesium alloy parts on automotive industry, this mainly shows the insufficient strength height, still can not be used on the important structure parts, the high temperature use properties obviously descends; More than two aspects can not get not solving, magnesium alloy just can not obtain widely to use in automotive industry.
The high temperature creep-resisting magnesium alloy of having developed at present mainly contains AE42 alloy (diecast magnesium alloy, U.S. DOW company, cost height, melt treatment complexity, manufacturability is poor, creep-resistant property is good), AS41 and AS21 alloy (diecast magnesium alloy, germany volkswagen company, manufacturability is poor, creep-resistant property is general), AC52 alloy (diecast magnesium alloy, AM General company, the test assessment stage, do not see and carry out industrial application), (the sand mold casting magnesium alloy contains Y and Nd to WE43, has the good high-temperature performance, the cost height, the melt treatment complexity), but yet there are no about containing the creep resistance diecast magnesium alloy of Y and Nd.
Summary of the invention:
The objective of the invention is to be to provide a kind of novel anti high temperature creep diecast magnesium alloy; so low melting point and Mg-Y are cheaply being adopted in the essential distinction of the one-tenth assignment system of this series novel alloy and the WE43 alloy of the mishmetal preparation of adopting rich Y; the Nd master alloy is realized the interpolation of Y and Nd; utilize Y and Nd solid solubility in magnesium alloy bigger; make full use of the creep-resistant property that solution strengthening improves magnesium alloy; and greatly reduce the complexity of cost and melt treatment; thereby the low cost of making; the mass-producing commercial production becomes possibility; and satisfying in the automotive industry requirement to material cost, its cost is the highest can not to surpass 15% of AZ91 magnesium alloy cost.Its good manufacturability is easy to promote the use of, and satisfies at 150 ℃ steady operation under the 50MPa condition.
Technical scheme of the present invention is achieved in that a kind of novel anti high temperature creep diecast magnesium alloy, it is characterized in that: the composition of alloy is by ratio of weight and the number of copies: Al 8.0-9.5, Zn 0.65-0.90, Y 0.5-0.78, and remainder is made up of Mg and unavoidable impurities.
The present invention also provides a kind of novel anti high temperature creep diecast magnesium alloy, and it is characterized in that: the composition of alloy is by ratio of weight and the number of copies: Al 8.0-9.5, and Zn 0.64-0.90, Nd0.5-0.76, and remainder is made up of Mg and unavoidable impurities.
Processing step of the present invention is as follows: comprise the preparation and the melting of alloy;
(1) preparation of alloy: comprise following two kinds of methods;
Method 1:
Calculate the parts by weight that each raw material needs according to the composition that adopts, the employing raw material is: (composition should meet the regulation of ASTM B93/94 to the AZ91HP alloy, Mn content＞0.3% wherein, its composition is pressed Mg 90.3, Al 9, Zn 0.7 calculates), pure Al (calculate umber 1.05), Mg-Y or Nd master alloy (calculate 1.03 of umber, except that rare earth element, its Si, Mn, Fe, Ni, Cu and other impurity should meet the corresponding composition regulation of AZ91HP alloy among the ASTM B93/94, its composition is pressed Mg 19.8, Y 20, and Mn 0.2 calculates), electrolysis Zn (calculate umber 1.03).
Calculate the parts by weight that each raw material needs according to the composition that adopts, the employing raw material is: magnesium ingot (calculates 1.08 of umber, Mg content by umber greater than 99.9), pure Al (calculate umber 1.02), electrolysis Zn (calculate umber 1.01), Al-Mn alloy, Mg-Y or Nd master alloy (calculate 1.03 of umber, except that rare earth element, its Si, Mn, Fe, Ni, Cu and other impurity should meet the corresponding composition regulation of AZ91HP alloy among the ASTM B93/94, its composition is pressed Mg 19.8, and Y 20, and Mn 0.2 calculates).
(2) melting of alloy:
1. the raw material that method 1 is configured adds in the following order: with the AZ91HP alloy, and electrolysis Zn, pure Al after the mixing is warming up to it 685-690 ℃ of fusing, is promptly feeding mixed gas protectedly more than 420 ℃, and its ratio of gas mixture is: N
2+ 0.002-0.005%SF
6, add Mg-Y or Nd master alloy until completely melted, static 30 minutes, keep melt temperature at 680-690 ℃, get final product die casting or reduce to 620-630 ℃ of cast alloy cast ingot.
2. the raw material that method 2 is configured, remove Mg-Y or Nd master alloy, all the other raw materials are pressed the general melting program melting of AZ91HP alloy, after treating that alloy is finished refining, keep melt temperature at 690-710 ℃, add Mg-Y or Nd master alloy, and logical Ar stirred 20 minutes, static to 690 ℃ of die casting or reduce to 620-630 ℃ of cast alloy cast ingot.
Positively effect of the present invention is: its good manufacturability is easy to promote the use of, and satisfies at 150 ℃, steady operation under the 50MPa condition, the highest 15% of the AZ91HP alloy that is no more than of its cost.And prove its effect by following experimental example:
Experimental example 1:
Compare test with alloy of the present invention and AZ91HP alloy at room temperature tensile strength, wherein 1# is the AZ91HP alloy, and 2# and 3# are the alloy of dosing different ratios Y of the present invention, and 4# and 5# dose the alloy of different ratios Nd for the present invention.The alloy tensile strength at room temperature of two kinds of different components is apparently higher than the AZ91HP alloy as can be seen by the test-results of Fig. 3, and the tested alloys composition is as shown in table 1.
Table 1 tested alloys composition
Can prove by Fig. 3, the AZ91HP alloy tensile strength at room temperature of 1# is 220MPa, 2# and 3# dose respectively 0.57 and the alloy tensile strength at room temperature of 0.78Y then be 272MPa and 275MPa, 4# and 5# dose respectively 0.48 and the alloy tensile strength at room temperature of 0.76Nd be 264 and 274MPa.
Experimental example 2:
Tested alloys in the table 1 at 150 ℃, is carried out the creep resistance test under the 50MPa, its test-results as shown in Figure 4.The creep-resistant property of 2# of the present invention and 3# and 4# and 5# alloy is significantly better than the AZ91HP alloy, and the creep compliance of its 100h has only the 1/15-1/20 of AZ91HP alloy.The creep-resistant property of 2# and 3# alloy is a little more than the alloy of 4# and 5#, because the difference of the creep resistance of the alloy of different ratios is little, so that some creep curve overlaps.
Cost analysis
According to the cost estimating to alloy of the present invention, visible novel alloy cost of the present invention has increased about 8% with AZ91 alloy phase ratio as shown in Figure 5.
Description of drawings
Fig. 1 is the ambient temperature mechanical properties sample
Fig. 2 is creep test sample
Fig. 3 is the contrast of magnesium alloy materials of the present invention and AZ91HP alloy room temperature tensile strength.
Fig. 4 is in creep test, the contrast of magnesium alloy materials of the present invention and AZ91HP alloy creep-resistant property.
Fig. 5 is the cost estimating of alloy of the present invention.
Embodiment:
The invention will be further described below in conjunction with accompanying drawing:
Embodiment 1:
A kind of novel anti high temperature creep diecast magnesium alloy, its alloy ingredient comprises Al 9.0 by ratio of weight and the number of copies, and Zn 0.65, and Y 0.5, and Mn 0.2, and remainder is made up of Mg and unavoidable impurities.The adding of Mn mainly is in order to improve corrosion resistance of alloy, if the parts by weight of Mn surpass 0.4, might form the compound that influences creep-resistant property, and the parts by weight of Mn to be lower than 0.1, then corrosion resisting property not being had benefit.The preparation of this composition alloy and the process of melting may further comprise the steps:
(1) preparation of alloy
Novel alloy can adopt following two kinds of methods preparation,
Method 1:
The employing raw material is: (composition should meet the regulation of ASTM B93/94 to the AZ91HP alloy, Mn content＞0.3% wherein), pure Al, Mg-Y or Nd master alloy are (except that rare earth element, its Si, Mn, Fe, Ni, Cu and other impurity should meet the corresponding composition regulation of AZ91HP alloy among the ASTM B93/94), electrolysis Zn, calculate each raw-material consumption according to the composition proportion that adopts, wherein pure Al takes by weighing by 1.05 of calculating umber, the Mg-Y master alloy takes by weighing by 1.03 of calculating umber, and Zn takes by weighing by 1.03 of calculating umber;
The employing raw material is: magnesium ingot (
Mg content is counted by weight greater than 99.9), pure Al, electrolysis Zn, Al-Mn alloy, Mg-Y master alloy (except that rare earth element, its Si, Mn, Fe, Ni, Cu, other impurity should meet the corresponding composition regulation of AZ91HP alloy among the ASTM B93/94).Calculate each raw-material consumption according to the composition proportion that adopts, wherein magnesium ingot takes by weighing by 1.08 of calculating umber, and pure Al takes by weighing by 1.02 of calculating umber, and the Mg-Y master alloy takes by weighing by 1.03 of calculating umber, and Zn takes by weighing by 1.01 of calculating umber;
(2) melting of alloy
Dispose raw material by method 1:
Raw-material addition sequence is the AZ91HP alloy, electrolysis Zn, and pure Al is warming up to 685-690 ℃ of fusing, is promptly feeding mixed gas protected (blending ratio: N more than 420 ℃
2+ 0.002-0.005%SF
6), add Mg-Y or Nd master alloy until completely melted, static 30 minutes, keep melt temperature at 680-690 ℃, get final product die casting or reduce to 620-630 ℃ of cast alloy cast ingot.
Dispose raw materials by method 2:
Remove the Mg-Y master alloy, all the other raw materials are pressed the general melting program melting of AZ91HP alloy, after treating that alloy is finished refining, keep melt temperature at 690-710 ℃, add Mg-Y (or Nd) master alloy, and logical Ar stirred 20 minutes, should try one's best without insulating covering agent (unless bath surface ignition) in this stage.Static to 690 ℃ of die casting or reduce to 620-630 ℃, the cast alloy cast ingot.
Embodiment 2:
A kind of novel anti high temperature creep diecast magnesium alloy, its alloy ingredient comprises Al 9.0 by ratio of weight and the number of copies, and Zn 0.90, and Nd 0.5, and Mn 0.4 and remainder are made up of Mg and unavoidable impurities.
The proportioning of Mg-Nd alloy is identical with embodiment 1 with the melting mode.
Embodiment 3:
A kind of novel anti high temperature creep diecast magnesium alloy, its alloy ingredient comprises Al 9.0 by ratio of weight and the number of copies, and Zn 0.90, and Y 0.1, and Nd 0.5, and Mn 0.4, and remainder is made up of Mg and unavoidable impurities.
The proportioning of Mg-Nd-Y alloy is identical with embodiment 1 with the melting step.
Claims (5)
1. novel anti high temperature creep diecast magnesium alloy, it is characterized in that: the composition of alloy is by ratio of weight and the number of copies: Al 8.0-9.5, Zn 0.65-0.90, Y 0.57-0.78, Mn0.26-0.40, and remainder is made up of Mg and unavoidable impurities.
2. novel anti high temperature creep diecast magnesium alloy, it is characterized in that: the composition of alloy is by ratio of weight and the number of copies: Al 8.0-9.5, Zn 0.64-0.90, Nd 0.5-0.76, Mn0.26-0.40, and remainder is made up of Mg and unavoidable impurities.
3. a kind of novel anti high temperature creep diecast magnesium alloy according to claim 1 is characterized in that described Y content is 0.7 by weight.
4. a kind of novel anti high temperature creep diecast magnesium alloy according to claim 2 is characterized in that described Nd content is 0.7 by weight.
5. the preparation method of a kind of novel anti high temperature creep diecast magnesium alloy according to claim 1 and 2 is characterized in that described diecast magnesium alloy prepares by following processing step: comprise the preparation and the melting of alloy:
(1) preparation of alloy comprises following two kinds of methods:
Method 1:
The employing raw material is: the AZ91HP alloy, require Mn content＞0.3%, pure Al for calculate umber 1.05, Mg-Y or Mg-Nd master alloy be for calculating 1.03 of umber, electrolysis Zn is for calculating 1.03 of umber;
Method 2;
The employing raw material is: magnesium ingot for calculate umber 1.08, pure Al for calculate umber 1.02, electrolysis Zn for calculate umber 1.01, Al-Mn alloy, Mg-Y or Mg-Nd master alloy be for calculating 1.03 of umber;
(2) melting of alloy:
1. the raw material that method 1 is configured adds in the following order: with the AZ91HP alloy, and electrolysis Zn, pure Al after the mixing is warming up to it 685-690 ℃ of fusing, is promptly feeding mixed gas protectedly more than 420 ℃, and its ratio of gas mixture is: N
2+ 0.002-0.005%SF
6, add Mg-Y or Nd master alloy until completely melted, static 30 minutes, and keep melt temperature at 680-690 ℃, get final product die casting or reduce to 620-630 ℃ of cast alloy cast ingot;
2. the raw material that method 2 is configured removes Mg-Y or Mg-Nd master alloy, all the other raw materials are pressed the general melting program melting of AZ91HP alloy, after treating that alloy is finished refining, keep melt temperature at 690-710 ℃, add Mg-Y or Mg-Nd master alloy, and logical Ar stirred 20 minutes, and is static to 690 ℃ of die casting or reduce to 620-630 ℃ of cast alloy cast ingot.
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| CNB031270638A CN100424209C (en) | 2003-06-06 | 2003-06-06 | High-temp, creeping resistant compression casting magnesium alloy |
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| CNB031270638A CN100424209C (en) | 2003-06-06 | 2003-06-06 | High-temp, creeping resistant compression casting magnesium alloy |
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| CN100424209C true CN100424209C (en) | 2008-10-08 |
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| CNB031270638A Expired - Lifetime CN100424209C (en) | 2003-06-06 | 2003-06-06 | High-temp, creeping resistant compression casting magnesium alloy |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100425720C (en) * | 2005-03-31 | 2008-10-15 | 鸿富锦精密工业（深圳）有限公司 | Creep resistant magnesium alloy materials |
| CN100430503C (en) * | 2006-05-17 | 2008-11-05 | 中国科学院金属研究所 | High-strength AZ91HP magnesium-alloy and its production |
| CN102296221A (en) * | 2011-09-22 | 2011-12-28 | 中南大学 | High-ductility high-yield-strength magnesium alloy |
| CN104152826B (en) * | 2014-07-17 | 2016-08-24 | 南昌大学 | A kind of heat treatment method of Mg-Al-Zn-Y magnesium-rare earth |
| CN107523729A (en) * | 2016-06-20 | 2017-12-29 | 张家港市华舰五金工具有限公司 | Deformable rare earth magnesium alloy and preparation method thereof |
| CN115652158B (en) * | 2022-10-25 | 2023-08-11 | 西安交通大学 | Creep-resistant Mg-Al deformed magnesium alloy and preparation method thereof |
Citations (2)
| 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 |
| CN1382823A (en) * | 2001-03-14 | 2002-12-04 | 利优比株式会社 | Creep resistance Dow metal |
-
2003
- 2003-06-06 CN CNB031270638A patent/CN100424209C/en not_active Expired - Lifetime
Patent Citations (2)
| 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 |
| CN1382823A (en) * | 2001-03-14 | 2002-12-04 | 利优比株式会社 | Creep resistance Dow metal |
Non-Patent Citations (6)
| Title |
|---|
| Effect of Y,Sr,and Nd additions on the microstructure andmicrofracture mechanism of squeeze-cast AZ91-X magnesiumalloys. Lee S, Lee S H, Kim D H.Metallurgical and Materials Transactions A,Vol.29A . 1998 |
| Effect of Y,Sr,and Nd additions on the microstructure andmicrofracture mechanism of squeeze-cast AZ91-X magnesiumalloys. Lee S, Lee S H, Kim D H.Metallurgical and Materials Transactions A,Vol.29A . 1998 * |
| 压铸镁合金高温蠕变研究现状及进展. 刘海峰，侯骏，刘耀辉，佟国栋，孟赢，刘文辉.铸造，第51卷第6期. 2002 |
| 压铸镁合金高温蠕变研究现状及进展. 刘海峰，侯骏，刘耀辉，佟国栋，孟赢，刘文辉.铸造，第51卷第6期. 2002 * |
| 钇及铈镧混合稀土对AZ91镁合金铸态组织的影响. 张诗昌，魏伯康，林汉同，王立士.中国有色金属学报，第11卷第S2期. 2001 |
| 钇及铈镧混合稀土对AZ91镁合金铸态组织的影响. 张诗昌，魏伯康，林汉同，王立士.中国有色金属学报，第11卷第S2期. 2001 * |
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