CN1515697A - Creep eresistant magnesium alloy with improved casting property - Google Patents
Creep eresistant magnesium alloy with improved casting property Download PDFInfo
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- CN1515697A CN1515697A CNA031031714A CN03103171A CN1515697A CN 1515697 A CN1515697 A CN 1515697A CN A031031714 A CNA031031714 A CN A031031714A CN 03103171 A CN03103171 A CN 03103171A CN 1515697 A CN1515697 A CN 1515697A
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Abstract
The present invention relates to a magnesium base alloy. Its composition contains at least 86 wt% of Mg, 4.8-9.2 wt% of Al, 0.08-0.38 wt% of Mn, 0.00-0.9 wt% of Zn, 0.2-1.2 wt% of Ca, 0.05-1.4 wt% of Sr and 0.00-0.8 wt% of rare earth element. The alloy also can contain Zr whose maximum content can be up to 0.02 wt% and Be whose maximum content can be up to 0.001 wt%.
Description
Technical field
The present invention relates to have the good creep resistance and the Magnuminium of improved castability, this alloy is applicable under the high temperature and uses, and has good solidity to corrosion.
Background of invention
Than the magnesium alloy of equal-volume aluminium alloy light 1/3, the possibility of many weight reductions can be provided, so, very attractive in as the application of automobile industry and aerospace industry.After CAFE king and other environmental legislation, most of auto-makers are target setting, and in the near future, each automobile uses the magnesium alloy of 40-100kg.Magnesium alloy component is produced by various castmethods, comprises high pressure diecasting, sand mold casting and permanent mold casting.Other relevant production technology is pressure die casting, semi-solid casting, touches to melt casting (thixocasting) and touch and melt molding (thixomolding).According to the prediction of international magnesium association (IMA), the use of die casting magnesium will continue to increase.Be used to make the ideal magnesium alloy of trolley part, except that cost efficiency, should satisfy some conditions, this condition relates in castingprocesses and the characteristic when using under stress continuously.Advantages of good casting comprises the good flowability of molten alloy to enter thin mould portion, and molten alloy is to the low-adhesion of mould and the oxidation-resistance in castingprocesses.Good alloy should not produce the crack in the cooling and the solidification stages of casting.The parts of alloy casting should have high stretching and compression yield strength, and in the use under the pyritous stress condition, should show low continuous strain (creep resistance).If parts are used as the parts of wheel casing float chamber, even be higher than under 120 ℃, should preferably keep the favorable mechanical performance in temperature.Alloy also should have solidity to corrosion.The physics of alloy and chemical property are decided by the existence of other metallic element basically, and it can form various intermetallic compounds.These intermetallic compounds stop crystal grain to slide under the pyritous stress condition.
All conventional die cast magnesium alloys are based on the Mg-Al system.Alloy of Mg-Al-Zn system (for example commercial alloy A Z91D that can buy) or alloy with Mg-Al-Mn system that good castability, solidity to corrosion, environment intensity and ductility combines, but their show the creep resistance and the hot strength of difference.On the other hand, Mg-Al-Si alloy and Mg-Al-RE alloy show improved creep resistance, but show the castability (AS21 and AE42 alloy) of not enough solidity to corrosion (AS41 and AS21 alloy) and difference.At ambient temperature, two of alloy types further show low relatively tensile yield strength.In addition, high-load rare earth element (RE) for example has 2.4% in AE42, increased cost.Adulterated Ca or Sr demonstration can overcome some shortcoming of mentioning in alloy.German patent specification No847992 has described Magnuminium, and it contains the aluminium of 2-10 weight %, 0-4 weight % zinc, 0.001-0.5 weight % manganese, the calcium of 0.5-3 weight % and reach the beryllium of 0.005 weight % at most.In addition, these alloys also contain the iron (reaching 0.3 weight % at most) of relative high density to suppress the hot tearing problem.Publication GB2296256 discloses and has contained the Magnuminium that reaches 2 weight %RE at most and reach 5.5 weight % calcium at most.WO9625529 discloses and has contained the Magnuminium that reaches 0.8 weight % calcium at most, and it at 150 ℃ down and apply under the 35MPa stress 200 hours and have and be less than 0.5% creep strain.EP799901 has described the Magnuminium of semi-solid casting, and it contains calcium that reaches 4 weight % at most and the strontium that reaches 0.15 weight % at most, and wherein the ratio of Ca/Al should be less than 0.8.EP791662 discloses and has contained the Magnuminium that reaches 3 weight %Ca at most and reach 3 weight %RE elements at most, and wherein only when element reaches certain ratio, but alloy is die casting.EP1048743 has instructed the method for making cast magnesium alloys, comprises Ca that reaches 3.3 weight % at most and the Sr that reaches 0.2 weight % at most.U.S. Patent No. 6139651 discloses and has contained the Ca that reaches 1.2 weight % at most, reaches the Magnuminium of the Sr of 0.2 weight % at most, but the scope of Zn is 0.01-1 or 5-10 weight %.WO0144529 has described and has contained the magnesium base casting alloy that reaches 2.2 weight %Sr at most.
Purpose of the present invention provides has the alloy that improves intensity under envrionment temperature and high temperature, and at high temperature until under 150 ℃, have improved creep resistance at least.
Another object of the present invention provides the alloy that is specially adapted to high pressure diecasting technology, and it shows the susceptibility that reduces to sticking to mould, oxidation and hot tearing, and has good flowability.
Another purpose more of the present invention provides and is applicable to the Magnuminium that uses under the high temperature, and it has good solidity to corrosion.
Further object of the present invention provides the alloy that also can be used for other application, for example sand mold casting, permanent mold casting, pressure die casting, semi-solid casting, touches to melt casting (thixocasting) and touch and melts molding (thixomolding).
Although of the present invention more further purpose provide the alloy that does not contain beryllium but still can successfully cast.
Also purpose of the present invention provides the alloy that shows described characteristic and performance and have relatively low cost.
According to specification sheets, other purpose of the present invention and advantage can obviously be found out.
Summary of the invention
The present invention relates to have the Magnuminium of good resistance creep properties and castability, this alloy is applicable at high temperature and uses, and has good solidity to corrosion.Described alloy comprises aluminium, manganese, zinc, calcium, strontium, zirconium and rare earth element.Alloy of the present invention contains the Mg of at least 86 weight %, 4.8-9.2 the aluminium of weight %, 0.08-0.38 the manganese of weight %, 0.00-0.9 the zinc of weight %, 0.1-1.2 the calcium of weight %, 0.05-1.4 the strontium of weight %, the zirconium of 0.00-0.8 weight % rare earth element and 0.00-0.02 weight %, and they can contain the beryllium that reaches 0.001 weight % at most.The content of iron, nickel, copper and silicon is no more than 0.004 weight % respectively in alloy, 0.001 weight %, 0.003 weight % and 0.03 weight %.The total amount of calcium and strontium is higher than 0.9 weight %, and is lower than 1.6 weight %.Contain Mg-Al sosoloid as matrix according in the microstructure of alloy of the present invention, and the intermetallic compound Mg that is positioned at described Mg-Al sosoloid crystal boundary place
17Al
9Ca
2Sr, Al
2Ca
0.5Sr
0.5, Al
8(Mn, RE), Al
2(Sr, Ca)
1, Al
2(Sr, Ca RE)
1And Al
x(Mn, RE)
y
Under envrionment temperature and 150 ℃, alloy of the present invention shows good intensity and creep property, and has good solidity to corrosion.In castingprocesses, they show good flowability, low stickness and for the low sensitivity of oxidation and hot tearing.This alloy also has low relatively cost.
The present invention also relates to can be used for polytechnic alloy, comprise high pressure diecasting, sand mold casting, die cast, squeeze casting, semi-solid casting, touch to melt casting (thixocasting) and touch and melt molding (thixomolding).
The present invention further relates to by casting and has the goods that the Magnuminium of component as indicated above is produced, and this alloy has good creep resistance and castability.Described goods are applicable at high temperature and use, and have good solidity to corrosion.
Description of drawings
By following embodiment and with reference to the accompanying drawings, can more easily find out above-mentioned and other characteristic and advantage of the present invention, wherein:
Fig. 1 is a table 1, the chemical composition of expression alloy;
Fig. 2 is a table 2, is illustrated in the intermetallic phase in the new alloy;
Fig. 3 is a table 3, the castability of expression new alloy;
Fig. 4 is a table 4, the mechanical property of expression new alloy;
Fig. 5, A and B represent the microstructure according to the alloy for die casting of embodiment 4 and embodiment 8 respectively;
Fig. 6, A and B represent the microstructure according to the alloy for die casting of comparative examples 1 and comparative examples 2 respectively.
Specific embodiments
Have been found that now that in Magnuminium certain combination of element comprises aluminium, manganese, zinc, calcium, strontium, zirconium and rare earth element, can cause performance to be better than the performance of prior art alloy.These performances comprise fabulous molten metal characteristic and castability, improved creep resistance, solidity to corrosion and the high tensile under envrionment temperature and high temperature and the yield strength of compression.
Magnuminium of the present invention comprises the aluminium of 4.8-9.2 weight %.If the concentration of aluminium is lower than 4.8 weight %, alloy can not show advantages of good casting, and is especially relevant with flowability.On the other hand, the concentration of aluminium is higher than the deterioration that 9.2 weight % can cause embrittlement and creep resistance.Alloy of the present invention contains the manganese of 0.08-0.38 weight % and reaches the zinc of 0.9 weight % at most.Alloy of the present invention contains calcium and strontium.The preferable range of calcium is 0.2-1.2 weight %, and the preferable range of strontium is 0.05-1.4 weight %.The element of these two kinds of existence has improved creep resistance effectively by forming the stable intermetallic compound that stops crystal grain to slide.The total amount of calcium and strontium should be higher than 0.9 weight %, to suppress β-phase, Mg
17(Al, Zn)
12The formation of intermetallic compound, and improved creep resistance is provided.On the other hand, the total amount of calcium and strontium should be no more than 1.6 weight % to avoid embrittlement and to adhere to mold and hot tearing subsequently.The oxidation-resistance of alloy is further given in the existence of calcium.Find that most of alloy of the present invention can be prepared into the steel ingot form, die casting under the condition that does not contain beryllium then.Alloy of the present invention can contain the rare earth element of maximum 0.8 weight %.Rare earth element improves the intermetallic compound of separating out and increases its stability.In addition, the existence of RE element improves solidity to corrosion.But, contain the castability that the RE element that surpasses 0.8 weight % can cause reducing strength property and deterioration in the alloy, saying nothing of also to increase cost.
Alloy of the present invention contains minimum iron, copper and mickel, to keep low corrosion rate.In alloy, contain the iron that is less than 0.004 weight %, preferably be less than the iron of 0.003 weight %.Can reduce iron level by adding manganese.When the residual manganese content of minimum is 0.17 weight %, can obtain to be less than the iron level of 0.003 weight %, still, also exist if reach a small amount of zirconium of 0.02 weight % at most, the manganese that only contains 0.08 weight % also can obtain identical result.
Contain the nickel that is no more than 0.001 weight % according to alloy of the present invention, be no more than the copper and the silicon that is no more than 0.03 weight % of 0.003 weight %.
In preferred specific embodiment of the present invention, Magnuminium contains the aluminium of 7.8-8.8 weight %, 0.00-0.3 the zinc of weight %, 0.65-1.05 the calcium of weight %, 0.15-0.65 the strontium of weight %, 0.00-0.2 weight % rare earth element and 0.08-0.28 weight % manganese, wherein rare earth element adds as cerium base misch metal.Alloy according to preferred specific embodiment contains Mg-Al sosoloid as matrix, and intermetallic compound Mg
17Al
9Ca
2Sr, Al
2Ca
0.5Sr
0.5And Al
8(Mn, RE)
5, wherein said intermetallic compound is positioned at the crystal boundary place of Mg-Al sosoloid.
In another preferred specific embodiment of the present invention, Magnuminium contains the aluminium of 4.8-6.0 weight %, 0.10-0.37 the manganese of weight %, 0.00-0.3 the zinc of weight %, 0.15-0.30 the calcium of weight %, 0.7-1.4 the rare earth element of the strontium of weight % and 0.1-0.6 weight %, wherein rare earth element adds as cerium base misch metal.Alloy according to preferred specific embodiment contains Mg-Al sosoloid as matrix, and intermetallic compound crystal grain Al
2(Sr, Ca), Al
2(Sr, Ca, RE)
1And Al
x(Mn, RE)
y, wherein said intermetallic compound is positioned at Mg-Al sosoloid crystal boundary place.
Have been found that some other intermetallic compound, except above-mentioned enumerate, in the presence of calcium, strontium, rare earth element, zinc and manganese, in alloy of the present invention, separate out, its weight percentage is listed in as mentioned, comprises Mg
17(Al, Ca, Sr)
12, Mg
17(Al, Ca, Sr, Zn)
12(Al, Zn)
2(Ca, Sr).Crystal boundary place at the sosoloid of Mg-Al matrix finds these intermetallic phases.
Magnesium alloy of the present invention after tested, and compare with control sample comprises and using on a large scale, commercial can the acquisition, magnesium alloy AZ91D and AE42.Test by scanning electronic microscope, and the X-ray diffraction analysis of precipitate is presented at control sample and obviously different according to existing between the alloy of the present invention, for example, the formation of new intermetallic precipitate.The microstructure of new alloy for example, is made of close grain Mg-Al sosoloid and the eutectic phase that is positioned at the crystal boundary place.
In castingprocesses, by the parameter of giving alloy characteristic in conjunction with three kinds: mobile, stickness and oxidation-resistance, can estimate castability.In all control samples, have only the AZ91D alloy to have similar castability to alloy of the present invention, the castability of alloy of the present invention significantly is better than the AE42 alloy.
Under envrionment temperature and 150 ℃, tensile and compression test shows that tensile yield strength (TYS) and compression yield strength (CYS) that alloy of the present invention has are significantly higher than AZ91D and AE42 alloy.
The solidity to corrosion of new alloy is measured by being immersed in the NaCl solution, its similar in appearance to or be better than the AZ91D alloy, and significantly be better than the AE42 alloy.
Under the stress of 85MPa and 50MPa of respectively doing for oneself and under 135 ℃ and 150 ℃ of temperature, measured creep properties in 200 hours.The selection of condition is based on for example requirement of wheel casing, intake manifold etc. of power-driven gear member.Creep speed value with minimum characterizes creep resistance, and this value is regarded as the most important design variable of power-driven gear member.The creep resistance of alloy of the present invention is better than the AE42 alloy, and significantly is better than the AZ91D alloy.
In preferred specific embodiment, the goods of making according to alloy of the present invention are high pressure diecastings.
In other specific embodiment of the present invention, goods according to alloy manufacturing of the present invention are cast by selecting a kind of operation, and this operation comprises sand mold casting, die cast, squeeze casting, semi-solid casting, touches to melt casting (thixocasting) and touch and melt molding (thixomolding).
Based on above-mentioned discovery, the present invention also comprises the goods of being made by the magnesium alloy component, and described goods have improved intensity, creep resistance and solidity to corrosion under envrionment temperature and high temperature, and wherein said goods are as the parts of automobile or aerospace tectonic system.
Further describe and explain the present invention in the following embodiments.
Embodiment
Common operation
Alloy of the present invention is to prepare in the bath that 100 liters soft steel is done.CO
2+ 0.5%SF
6Mixture as protective atmosphere.The raw material that uses is as follows:
Magnesium-pure magnesium, grade 9980A contains at least 99.8% magnesium.
Manganese-when temperature of fusion is 700 ℃-720 ℃, the Al-60%Mn mother alloy being joined in the molten magnesium, this depends mainly on the concentration of magnesium.The violent stirring of the special preparation of carrier sheet and 15-30 minute melt is used for promoting the dissolving of manganese at molten magnesium.
Aluminium-commercially available pure Al (being less than 0.2% impurity).
Rare earth element-contain the cerium base misch metal of 50%Ce+25%La+20%Nd+5%Pr.
Calcium-mother alloy Al-75%Ca.
Strontium-mother alloy Al-90%Sr.
Zinc-commercially available pure Zn (being less than 0.1% impurity).
The representative temperature that adds Al, Ca, Sr, Sn and Zn is 690 ℃-710 ℃.Violent stirring 2-15 minute with these elements in the abundant dissolving molten magnesium.
Beryllium-before casting, under 660-690 ℃ temperature, after the tempering melt, in some new alloys, add the beryllium of 5-10ppm with the form of mother alloy Al-1%Be.But, in the preparation of most of new alloys and casting, do not contain Be.
After the required component of preparation, be the steel ingot of 8kg with alloy casting.In mold,, under condition, cast without any the molten metal protection in solidification stages.Calcination or oxidation are not observed in surface at all test steel ingots.Use the spark emission spectrometer to carry out chemical analysis.The cold-chamber die castig machine that uses IDRA OL-320 to have 345 tons of mold locking forces carries out the die casting test.The mould that is used for the production test sample is six chamber molds, produces:
-be used for two circular samples according to the tension test of ASTM standard B557M-94,
-be applicable to a sample of creep test,
-be applicable to a sample of fatigue test,
-one ASTM E23 standard shock test sample,
-one diameter is the circular sample of 10mm, and it is used for the dip etching test according to ASTM G31 standard.
By observing mobile (F), oxidation-resistance (OR) and mould adhesivity (D) are estimated the die cast performance in the die casting test.About three kinds of performances, from 1 to 10 increase according to quality, every kind of alloy has all been done grading.By three calculation of parameter bonded of weighing " castability factor " (CF), wherein the weighing factor of sticking to mould is 4, flowability and oxygenizement, and the weighing factor that each has is 1:
Wherein T is actual casting temp, the 670th, the casting temp of AZ91D alloy [℃].
Use opticmicroscope and be equipped with energy to disperse the scanning electronic microscope (SEM) of spectrometer (EDS) to carry out metallographic examination.Use the X-ray diffraction analysis that combines with the EDS analysis to measure mutually component.
Under envrionment temperature and high temperature, use to be equipped with the Instron4483 machine of high-temperature chamber to carry out tensile and compression test.Measure tensile yield strength (TYS), final tensile strength (UTS) and unit elongation (%E), and compression yield strength (CYS).
SATEC type M-3 machine is used for creep test.Under the stress of 85MPa and 50MPa of respectively doing for oneself and under 135 ℃ and 150 ℃ of temperature, carried out creep test in 200 hours.The selection of condition is based on power-driven gear member required creep properties such as wheel casing, intake manifold for example.Creep speed value (MCR) with minimum characterizes creep resistance, and this value is regarded as the most important design variable of power-driven gear member.
According to ASTM standard G31-87, use dip etching test evaluation corrosive property.Test sample, long 100mm and diameter are the cylindrical bar of 10mm, remove oil stain in acetone, under 23 ± 1 ℃ of envrionment temperatures, are immersed in the 5%NaCl solution 72 hours then.Every kind of alloy revision test 5 times.Then, under 80 ℃, in about 3 minutes, at chromic acid solution (180gCrO in every liter of solution
3) in, make sample exfoliation corrosion product.Gravimetry loss, be used for calculating with milligram/centimetre
2The average corrosion rate of/day calculating.
The embodiment of alloy
Table 1-4 shows chemical composition and the performance according to alloy of the present invention and comparative examples alloy.The chemical composition of table 1 14 new alloys of expression and 5 comparative examples.Comparative examples 1 and 2 is respectively commercially available magnesium alloy AZ91D and AE42.The metallographic examination of new alloy and comparative examples 1 and 2 the results are shown among Fig. 5-8.The microstructure of new alloy is made of with the eutectic phase that is positioned at the crystal boundary place the close grain of Mg-Al sosoloid.Use X-ray diffraction analysis and EDS to analyze and differentiate these precipitates.The result who obtains and the data results of comparative examples are listed in the table 2.
As can be seen from Table 2, the alloy with aluminium, calcium, strontium, rare earth element, manganese and zinc can cause forming new precipitate, and this precipitate is different from the intermetallic compound that forms in AZ91D and AE42 alloy.
The die cast performance of new alloy is shown in Table 3.The result shows that obviously the die cast performance of new alloy demonstration of the present invention similar in appearance to AZ91D, significantly is better than AE42 (comparative examples 1) or other comparative examples.The stretching of new alloy, compression and corrosive nature are shown in Table 4.In envrionment temperature with under 150 ℃, alloy of the present invention shows tensile yield strength (TYS) and the compression yield strength (CYS) that is higher than the AZ91D alloy, and the CYS and the TYS that are significantly higher than the AE42 alloy.
The solidity to corrosion of new alloy also similar in appearance to or be better than the AZ91D alloy, and significantly better than the solidity to corrosion of AE42 alloy.
As can be seen from Table 4, under 135 ℃ and 150 ℃, alloy of the present invention significantly is better than AZ91D aspect creep resistance.Sometimes, reach two sequence grades in the difference aspect the minimum creep rate (MCR).Under 135 ℃ and under the stress at 85MPa, the creep resistance of alloy of the present invention also is better than the AE42 alloy.
Though the present invention is described with regard to some specific embodiment,, many corrections and change are fine.So, be appreciated that except having offered some clarification within the scope of the appended claims, the present invention can realize.
Claims (15)
1, a kind of Magnuminium contains
A) magnesium of at least 86 weight %,
B) aluminium of 4.8-9.2 weight %,
C) manganese of 0.08-0.38 weight %,
D) zinc of 0.00-0.9 weight %,
E) calcium of 0.2-1.2 weight %,
F) strontium of 0.05-1.4 weight % and
G) 0.00-0.8 weight % rare earth element.
2, according to the alloy of claim 1, also further contain the zirconium that reaches 0.02 weight % at most.
3, according to the alloy of claim 1 and 2, also further contain the beryllium that reaches 0.001 weight % at most.
4, according to the alloy of claim 1-3, also further contain accidental impurity.
5, according to the alloy of claim 1-4, contain the iron that reaches 0.004 weight % at most, reach the nickel of 0.001 weight % at most, reach the copper of 0.003 weight % at most or reach the silicon of 0.03 weight % at most.
6, according to the alloy of claim 1-5, wherein the total amount of calcium and strontium is higher than 0.9 weight %, and is lower than 1.6 weight %.
7, according to the alloy of claim 1, it contains the aluminium of 7.8-8.8 weight %, the zinc of 0.00-0.3 weight %, the calcium of 0.65-1.05 weight %, the strontium of 0.15-0.65 weight %, the manganese of 0.00-0.2 weight % rare earth element and 0.08-0.28 weight %.
8, according to the alloy of claim 7, in their structure, contain Mg-Al sosoloid as matrix, and intermetallic compound Mg
17Al
9Ca
2Sr, Al
2Ca
0.5Sr
0.5And Al
8(Mn, RE)
5, described intermetallic compound is positioned at the crystal boundary place of Mg-Al sosoloid.
9, according to the alloy of claim 1, it contains the aluminium of 4.8-6.0 weight %, the manganese of 0.10-0.37 weight %, the zinc of 0.00-0.3 weight %, the calcium of 0.20-0.30 weight %, the rare earth element of the strontium of 0.7-1.4 weight % and 0.1-0.6 weight %.
10, according to the alloy of claim 9, in their structure, contain Mg-Al sosoloid as matrix, and intermetallic compound Al
2(Sr, Ca), Al
2(Sr, Ca, RE)
1And Al
x(Mn, RE)
y, described intermetallic compound is positioned at the crystal boundary place of Mg-Al sosoloid.
11, according to one of any alloy of claim 1-10, wherein rare earth element comprises misch metal.
12, according to one of any alloy of claim 1-11, wherein do not contain beryllium.
13, according to one of any alloy of claim 1-12, under envrionment temperature and high temperature, has high creep resistance, mainly as described in the specification sheets.
14, a kind of goods, it is the foundry goods by one of any magnesium alloy of claim 1-13.
15, the goods of claim 14, castmethod wherein are selected from high pressure diecasting, sand mold casting, die cast, squeeze casting, semi-solid casting, touch to melt casting (thixocasting) and touch and melt molding (thixomolding).
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300357C (en) * | 2004-09-29 | 2007-02-14 | 上海交通大学 | Preparation of high-strength creep resistant deforming magnesium alloy |
| CN1306052C (en) * | 2004-09-17 | 2007-03-21 | 中国科学院上海微系统与信息技术研究所 | High corrosion resisting as cast magnalium and preparation method |
| CN1327021C (en) * | 2004-07-22 | 2007-07-18 | 同济大学 | Process for preparing magnesium alloy and its composite material |
| CN103695744A (en) * | 2014-01-16 | 2014-04-02 | 张霞 | Nanoparticle enhanced magnesium alloy and preparation method thereof |
| CN106967915A (en) * | 2017-06-02 | 2017-07-21 | 哈尔滨工业大学 | A kind of readily soluble Mg Y Ni Zr Ca magnesium alloys of super high-strength and high-modulus and preparation method thereof |
| CN108004423A (en) * | 2017-11-30 | 2018-05-08 | 于海松 | The synthesis technique of high-performance magnesium base alloy |
| CN109136700A (en) * | 2017-06-16 | 2019-01-04 | 比亚迪股份有限公司 | High thermal conductivity magnesium alloy, inverter case, inverter and automobile |
-
2003
- 2003-01-07 CN CNA031031714A patent/CN1515697A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1327021C (en) * | 2004-07-22 | 2007-07-18 | 同济大学 | Process for preparing magnesium alloy and its composite material |
| CN1306052C (en) * | 2004-09-17 | 2007-03-21 | 中国科学院上海微系统与信息技术研究所 | High corrosion resisting as cast magnalium and preparation method |
| CN1300357C (en) * | 2004-09-29 | 2007-02-14 | 上海交通大学 | Preparation of high-strength creep resistant deforming magnesium alloy |
| CN103695744A (en) * | 2014-01-16 | 2014-04-02 | 张霞 | Nanoparticle enhanced magnesium alloy and preparation method thereof |
| CN106967915A (en) * | 2017-06-02 | 2017-07-21 | 哈尔滨工业大学 | A kind of readily soluble Mg Y Ni Zr Ca magnesium alloys of super high-strength and high-modulus and preparation method thereof |
| CN109136700A (en) * | 2017-06-16 | 2019-01-04 | 比亚迪股份有限公司 | High thermal conductivity magnesium alloy, inverter case, inverter and automobile |
| CN108004423A (en) * | 2017-11-30 | 2018-05-08 | 于海松 | The synthesis technique of high-performance magnesium base alloy |
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