CN103305738A - Silicon-containing heat-resistant rare earth magnesium alloy and preparation method thereof - Google Patents
Silicon-containing heat-resistant rare earth magnesium alloy and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a silicon-containing heat-resistant rare earth magnesium alloy and a preparation method thereof, wherein the alloy comprises the following components by weight percentage: 5-10% of Gd, 2-8% of Y, 0.3-2% of Si, 0.35-0.8% of Zr, 1-13% of Gd+Y1, less than 0.02% of impurities and the balance of magnesium. The invention also relates to a preparation method of the silicon-containing heat-resistant rare earth magnesium alloy; and the method comprises the steps of raw material preheating, smelting and subsequent heat treatment, wherein the smelting is carried out under protection of the mixed gases of SF6 and CO2; and the subsequent heat treatment comprises solid-solution treatment and aging treatment on the silicon-containing heat-resistant rare earth magnesium alloy. The preparation method of the silicon-containing heat-resistant rare earth magnesium alloy is simple in process, low in content of rare earth, and capable of guaranteeing excellent plasticity while improving the strength of the alloy; and a high-strength high-tenacity heat-resistant wearable magnesium alloy can be obtained by adjusting the constituents of the alloy and the heat treatment process; besides, the obtained magnesium alloy can be applied to a plurality of fields of automobile, aerospace, war industry and the like, and thereby is capable of meeting the requirements of a plurality of application occasions.
Description
Technical field
The present invention relates to the magnesium alloy in a kind of structural metallic materials field and preparation method thereof, specifically, what relate to is a kind of siliceous heat resisting magnesium-rare earth alloy and preparation method thereof.
Background technology
Magnesium alloy is the lightest structural metallic materials of using at present, has high specific strength, specific rigidity, and good heat conduction, conduction and capability of electromagnetic shielding have broad application prospects in fields such as automobile, electronics, household electrical appliances, communication, instrument and space flight and aviation.Especially can satisfy the requirement of automobile industry aspect lightweight, less energy-consumption, high-environmental, therefore be subject to paying close attention to widely.Yet the ordinary magnesium alloy at high temperature low and poor defective of plasticity of intensity has restricted its application on engine and power system part.So improve the mechanical property of magnesium alloy, comprise hot strength, plasticity, creep resistance and wear resistance etc. is the basis that enlarges its industrial application.Therefore, need to develop high performance heat resistance magnesium alloy.In recent years, the adding of research discovery rare earth element can be proposed heavy alloyed high-temperature behavior and creep resistance largely, therefore develop a series of heat resistance magnesium alloys that can when 200～250 ℃ of conditions are long, use, such as Mg-Y-RE series alloy WE54 and WE43 alloy, these alloys have obtained commercial applications.As cast condition WE54 alloy is after T6 processes, and room temperature tensile strength is 280MPa, and yield strength is 172MPa, and unit elongation is 2%; Tensile strength is 240MPa in the time of 200 ℃, and yield strength 150MPa, unit elongation are 7%; 200 ℃/80MPa creep 100h deflection is 0.1%.
For the literature search discovery of prior art, Gd and Y element have good solution strengthening and ageing strengthening effect in magnesium alloy, can significantly improve the performance of magnesium alloy, are associated gold thereby obtain Mg-Gd-Y.At patent documentation, Chinese patent, its publication number are to have put down in writing a kind of high-strength heat-resistant rare earth magnesium alloy among the CN1804083A, and its component and weight percent are: Gd2～10%, Y3～12%, the weight sum of Gd and Y is 13～14%, Zr0.3～0.7% and is not more than 0.3% activating element (among Zn, Ag, Cu, Sr, Sr, Ca, Ti, Bi, the Cd any), or 0.6～1.5% Mn and be not more than 0.3% activating element (Sn, Si, Sb, Ca any), all the other are magnesium.This magnesium-rare earth consists of netted phase structure by precipitate, has high intensity and creep resistance, is 180MPa 300 ℃ of condition smallest limit tensile strength.Yet this patent middle-weight rare earths composition is higher and be not optimized, the increase that brings cost on the one hand, and high rare-earth content causes that plasticity and other performances are slightly poor to have restricted its comprehensively application of demand in the power system part on the other hand; And the Si element only adds together with Mn and is very micro-, is not as special strengthening element.In conjunction with containing the Mg-Al-Si of Si and Mg-Al-Si-RE (such as Chinese patent about the piston applications type in the present patent, its publication number is CN1796024A) and Mg-Zn-Si-RE class alloy (such as Chinese patent: application number is 200410102511, publication number is that CN1886528A and publication number are CN101027420A) have preferably resistance toheat and a wear resisting property, the present invention is intended to comprehensively to contain the comprehensive excellent properties that the magnesium alloy of Si and rare earth element has, optimize rational RE content and subsequent heat treatment technique, obtain a kind of high-performance magnesium-alloy of high-strength and high ductility heat-resistant antifriction.
Summary of the invention
For defective of the prior art, the purpose of this invention is to provide a kind of siliceous heat resisting magnesium-rare earth alloy and preparation method thereof.By in Mg, adding Gd, Y, Zr and a small amount of Si element, and optimization solid solution and aging technique parameter, realization is under rational rare earth element total amount, obtain excellent room temperature and hot strength and plasticity, and in the resistance toheat that keeps alloy, put forward heavy alloyed wear resistance, obtain the heat resistance magnesium alloy of excellent combination property.
The present invention is achieved by the following technical solutions:
First aspect the present invention relates to a kind of siliceous heat resisting magnesium-rare earth alloy, and described alloy comprises each component of following weight percent:
Gd 5～10%，
Y 2～8%，
Si 0.3～2%，
Zr 0.35～0.8%，
Gd+Y 11～13%，
Impurity is less than 0.02%,
Surplus is magnesium.
Preferably, the weight percent of each composition of described impurity is: Fe＜0.005%, Cu＜0.005%, Ni＜0.002%, Ca＜0.01%.
Second aspect the invention still further relates to the preparation method of aforesaid siliceous heat resisting magnesium-rare earth alloy, and described method comprises: raw material preheating, melting and subsequent heat treatment:
Step 1, raw material preheating: raw material magnesium ingot, Mg-Si, Mg-Gd, Mg-Y and Mg-Zr master alloy are carried out preheating;
Step 2, melting: described melting is at flux or SF
6And CO
2Carry out under mixed gas protected, comprise the steps:
Step 2.1 adds hot smelting with magnesium ingot;
Step 2.2 after magnesium ingot melts fully, adds Mg-Si master alloy and stirring, adds successively Mg-Gd master alloy, Mg-Y master alloy, Mg-Zr master alloy again, insulation adds the refining agent refining, leaves standstill, skim, casting ladle casting or low-pressure casting get siliceous heat resisting magnesium-rare earth alloy;
Step 3, subsequent heat treatment comprises the steps:
Described siliceous heat resisting magnesium-rare earth alloy is carried out solution treatment, ageing treatment.
Preferably, in the step 1, described preheating temperature is 180～220 ℃.
Preferably, in the step 2.2, treat to add the Mg-Si master alloy when magnesium liquid temp is 660～680 ℃, churning time is 3～5 minutes; Treat to add when the magnesium liquid temp is 730～750 ℃ the Mg-Gd master alloy, go up to 730～750 ℃ and the stable rear Mg-Y of adding alloy until the magnesium liquid temp, treat to add the Mg-Zr master alloy when magnesium liquid temp is 780～790 ℃, described holding temperature is 780 ℃, and soaking time is 5～15min.
Preferably, in the step 2.2, described refining time is 5～15 minutes, and described dwell temperature is 760～780 ℃, and described time of repose is 20～30 minutes, and the described temperature of skimming is 700～720 ℃.
Preferably, in the described step 3, the temperature of described solution treatment is 480～520 ℃, and the time is 4～20h; The temperature of described ageing treatment is 200～250 ℃, and the time is 8～50h.
Preferably, the massfraction ﹥ 99.9% of magnesium in the described magnesium ingot, described flux and refining agent are for containing MgCl
2, KCl, CaF
2Magnesium alloy flux.
Preferably, described SF
6And CO
2SF in the mixed gas
6Percent by volume is 0.2%.
Preferably, follow stirring in the described refining process.
The present invention has following beneficial effect:
(1) alloy of the present invention passes through to add a small amount of Si, and the content of Gd and Y is further optimized, so that alloy has higher intensity and good plasticity; Under the prerequisite that guarantees enough strengthening effects, control rare earth element total amount, the Si of adding forms Mg
2Si and (RE
xSi
y) hard phase, its fusing point is high, and specific rigidity is high, but the wear resistance of Effective Raise alloy; Add Zr by the remarkable crystal grain thinning of heterogeneous forming core, strengthen the refined crystalline strengthening effect and improve alloy plasticity;
(2) the present invention increases the Precipitation phase amount and makes its refinement in conjunction with optimizing solid solution and aging technique parameter.By above principle and method, make alloy of the present invention have a content of rare earth lower, intensity is high, the excellent specific property such as good and heat-resistant antifriction of plasticity.
(3) technique of the present invention is simple, and content of rare earth is lower, has guaranteed good plasticity when improving alloy strength, and can by adjusting alloying constituent and thermal treatment process, obtain the magnesium alloy of the high-strength and high ductility heat-resistant antifriction of different premium properties combinations.Be fit to scale operation, can be applicable to automobile aerospace military project etc. multi-field, satisfy the needs of various application occasions.
Embodiment
The present invention is described in detail below in conjunction with specific embodiment.Following examples will help those skilled in the art further to understand the present invention, but not limit in any form the present invention.Should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, can also make some distortion and improvement.These all belong to protection scope of the present invention.
Embodiment 1
The present embodiment relates to a kind of siliceous heat resisting magnesium-rare earth alloy, and described alloy comprises each component of following weight percent:
9%Gd, 2%Y, 0.5%Si and 0.35%Zr, all the other are Mg and inevitable impurity (weight percent is less than 0.02%).Wherein impurity content is: Fe＜0.005%, Cu＜0.005%, Ni＜0.002%, Ca＜0.01%.
The present embodiment also relates to the preparation method of this alloy of aforementioned silicon heat resisting magnesium-rare earth alloy, and described method comprises: raw material preheating, melting and subsequent heat treatment:
Step 1, raw material preheating: raw material magnesium ingot, Mg-Si, Mg-Gd, Mg-Y and Mg-Zr master alloy are preheated to 200 ℃;
Step 2, melting: at SF
6And CO
2Mixed gas (SF
6Percent by volume is 0.2%) protection is lower carries out, and comprises the steps: that (1) adds magnesium: the pure magnesium of adding in electrical crucible, carry out melting; (2) add Si: after magnesium melts fully, in the time of 680 ℃, add the Mg-Si master alloy and stirred 5 minutes; (3) add Gd and Y: add the Mg-Gd master alloy after being warming up to 730 ℃, treat that the magnesium liquid temp adds the Mg-Y master alloy when ging up to 730 ℃; (4) add Zr: rising magnesium liquid temp to 780 ℃ adding Mg-Zr master alloy; (5) refining: approximately after 15 minutes, constantly electrorefining is 15 minutes 780 ℃ of insulations, and refining process needs fully to stir; (6) casting: left standstill 30 minutes at 760 ℃ after the refining, treat that magnesium liquid is cooled to 700 ℃ of skimming operations, with metal type dies casting, casting is preheated to 250 ℃ with steel die, afterwards siliceous heat resisting magnesium-rare earth alloy;
Step 3, subsequent heat treatment: be under 500 ℃ of conditions in temperature, carry out the 6h solution treatment, then under temperature is 250 ℃ condition, carries out the 8h ageing treatment and get final product.
Implementation result: the siliceous heat resisting magnesium-rare earth alloy of the present embodiment preparation is at room temperature tensile strength 330MPa, yield strength 210MPa, unit elongation 10%; 200 ℃ of tensile strength 310MPa, yield strength 190MPa, unit elongation 16%; 100 hours deflections of creep are 0.065% under the 200 ℃/80MPa condition.
Embodiment 2
The present embodiment relates to a kind of siliceous heat resisting magnesium-rare earth alloy, described alloy comprises each component of following weight percent: 8%Gd, 3%Y, 1%Si and 0.6%Zr, all the other are Mg and inevitable impurity (weight percent is less than 0.02%), and wherein impurity content is: Fe＜0.005%, Cu＜0.005%, Ni＜0.002%, Ca＜0.01%.
The present embodiment also relates to the preparation method of this alloy of aforementioned silicon heat resisting magnesium-rare earth alloy, and described method comprises: described method comprises: raw material preheating, melting and subsequent heat treatment:
Step 1, raw material preheating: raw material magnesium ingot, Mg-Si, Mg-Gd, Mg-Y and Mg-Zr master alloy are preheated to 220 ℃;
Step 2, melting: at SF
6And CO
2Mixed gas (SF
6Percent by volume is 0.2%) protection is lower carries out, and comprises the steps: that (1) adds magnesium: the pure magnesium of adding in electrical crucible, carry out melting; (2) add Si: after magnesium melts fully, in the time of 660 ℃, add the Mg-Si master alloy and stirred 4 minutes; (3) add Gd and Y: add the Mg-Gd master alloy after being warming up to 740 ℃, treat that the magnesium liquid temp adds the Mg-Y master alloy when ging up to 740 ℃; (4) add Zr: rising magnesium liquid temp to 790 ℃ adding Mg-Zr master alloy; (5) refining: approximately after 10 minutes, constantly electrorefining is 10 minutes 780 ℃ of insulations, and refining process needs fully to stir; (6) casting: left standstill 25 minutes at 770 ℃ after the refining, treat that magnesium liquid is cooled to 710 ℃ of skimming operations, with metal type dies casting, casting is preheated to 240 ℃ with steel die, afterwards siliceous heat resisting magnesium-rare earth alloy;
Step 3, subsequent heat treatment: being under 500 ℃ of conditions in temperature, carrying out the 8h solution treatment, is under 225 ℃ of conditions in temperature then, carries out the 16h ageing treatment, gets final product.
Implementation result: the siliceous heat resisting magnesium-rare earth alloy of the present embodiment preparation is at room temperature tensile strength 350MPa, yield strength 220MPa, unit elongation 8%; 200 ℃ of tensile strength 320MPa, yield strength 205MPa, unit elongation 14%; 100 hours deflections of creep are 0.052% under the 200 ℃/80MPa condition.
Embodiment 3
The present embodiment relates to a kind of siliceous heat resisting magnesium-rare earth alloy, described alloy comprises each component of following weight percent: 10%Gd, 3%Y, 2%Si and 0.5%Zr, all the other are Mg and inevitable impurity (weight percent is less than 0.02%), and wherein impurity content is: Fe＜0.005%, Cu＜0.005%, Ni＜0.002%, Ca＜0.01%.
The present embodiment also relates to the preparation method of this alloy of aforementioned silicon heat resisting magnesium-rare earth alloy, and described method comprises: described method comprises: raw material preheating, melting and subsequent heat treatment:
Step 1, raw material preheating: raw material magnesium ingot, Mg-Si, Mg-Gd, Mg-Y and Mg-Zr master alloy are preheated to 210 ℃;
Step 2, melting: at SF
6And CO
2Mixed gas (SF
6Percent by volume is 0.2%) protection is lower carries out, and comprises the steps: that (1) adds magnesium: the pure magnesium of adding in electrical crucible, carry out melting; (2) add Si: after magnesium melts fully, in the time of 670 ℃, add the Mg-Si master alloy and stirred 3 minutes; (3) add Gd and Y: add the Mg-Gd master alloy after being warming up to 750 ℃, treat that the magnesium liquid temp adds the Mg-Y master alloy when ging up to 750 ℃; (4) add Zr: rising magnesium liquid temp to 790 ℃ adding Mg-Zr master alloy; (5) refining: approximately after 5 minutes, constantly electrorefining is 5 minutes 780 ℃ of insulations, and refining process needs fully to stir; (6) casting: left standstill 20 minutes at 780 ℃ after the refining, treat that magnesium liquid is cooled to 720 ℃ of skimming operations, with metal type dies casting, casting is preheated to 260 ℃ with steel die, afterwards siliceous heat resisting magnesium-rare earth alloy;
Step 3, subsequent heat treatment: being under 490 ℃ of conditions in temperature, carrying out the 10h solution treatment, is under 200 ℃ of conditions in temperature then, carries out the 50h ageing treatment, gets final product.
Implementation result: the siliceous heat resisting magnesium-rare earth alloy of the present embodiment preparation is at room temperature tensile strength 360MPa, yield strength 230MPa, unit elongation 6%; 200 ℃ of tensile strength 340MPa, yield strength 215MPa, unit elongation 12%; 100 hours deflections of creep are 0.042% under the 200 ℃/80MPa condition.
Embodiment 4
The present embodiment relates to a kind of siliceous heat resisting magnesium-rare earth alloy, described alloy comprises each component of following weight percent: 5%Gd, 8%Y, 1.5%Si and 0.4%Zr, all the other are Mg and inevitable impurity, and wherein impurity content is: Fe＜0.005%, Cu＜0.005%, Ni＜0.002%, Ca＜0.01%.
The present embodiment also relates to the preparation method of this alloy of aforementioned silicon heat resisting magnesium-rare earth alloy, and described method comprises: described method comprises: raw material preheating, melting and subsequent heat treatment:
Step 1, raw material preheating: raw material magnesium ingot, Mg-Si, Mg-Gd, Mg-Y and Mg-Zr master alloy are preheated to 180 ℃;
Step 2, melting: at SF
6And CO
2Mixed gas (SF
6Percent by volume is 0.2%) protection is lower carries out, and comprises the steps: that (1) adds magnesium: the pure magnesium of adding in electrical crucible, carry out melting; (2) add Si: after magnesium melts fully, in the time of 670 ℃, add the Mg-Si master alloy and stirred 4 minutes; (3) add Gd and Y: add the Mg-Gd master alloy after being warming up to 730 ℃, treat that the magnesium liquid temp adds the Mg-Y master alloy when ging up to 730 ℃; (4) add Zr: rising magnesium liquid temp to 785 ℃ adding Mg-Zr master alloy; (5) refining: approximately after 10 minutes, constantly electrorefining is 10 minutes 780 ℃ of insulations, and refining process needs fully to stir; (6) casting: left standstill 25 minutes at 760 ℃ after the refining, treat that magnesium liquid is cooled to 700 ℃ of skimming operations, with metal type dies casting, casting is preheated to 250 ℃ with steel die, afterwards siliceous heat resisting magnesium-rare earth alloy;
Step 3, subsequent heat treatment: being under 480 ℃ of conditions in temperature, carrying out the 20h solution treatment, is under 200 ℃ of conditions in temperature then, carry out the 50h ageing treatment after, get final product.
Implementation result: the siliceous heat resisting magnesium-rare earth alloy of the present embodiment preparation is at room temperature tensile strength 320MPa, yield strength 215MPa, unit elongation 7%; 200 ℃ of tensile strength 295MPa, yield strength 205MPa, unit elongation 15%; 100 hours deflections of creep are 0.067% under the 200 ℃/80MPa condition.
Embodiment 5
The present embodiment relates to a kind of siliceous heat resisting magnesium-rare earth alloy, described alloy comprises each component of following weight percent: 6%Gd, 6%Y, 0.3%Si and 0.8%Zr, all the other are Mg and inevitable impurity, and wherein impurity content is: Fe＜0.005%, Cu＜0.005%, Ni＜0.002%, Ca＜0.01%.
The present embodiment also relates to the preparation method of this alloy of aforementioned silicon heat resisting magnesium-rare earth alloy, and described method comprises: described method comprises: raw material preheating, melting and subsequent heat treatment:
Step 1, raw material preheating: raw material magnesium ingot, Mg-Si, Mg-Gd, Mg-Y and Mg-Zr master alloy are preheated to 220 ℃;
Step 2, melting: containing MgCl
2, KCl, CaF
2The magnesium alloy flux protection under carry out, comprise the steps:
(1) adds magnesium: in electrical crucible, add pure magnesium, carry out melting; (2) add Si: after magnesium melts fully, in the time of 680 ℃, add the Mg-Si master alloy and stirred 5 minutes; (3) add Gd and Y: add the Mg-Gd master alloy after being warming up to 740 ℃, treat that the magnesium liquid temp adds the Mg-Y master alloy when ging up to 740 ℃; (4) add Zr: rising magnesium liquid temp to 790 ℃ adding Mg-Zr master alloy; (5) refining: approximately after 10 minutes, constantly electrorefining is 10 minutes 780 ℃ of insulations, and refining process needs fully to stir; (6) casting: left standstill 25 minutes at 770 ℃ after the refining, treat that magnesium liquid is cooled to 710 ℃ of skimming operations, with metal type dies casting, casting is preheated to 240 ℃ with steel die, afterwards siliceous heat resisting magnesium-rare earth alloy;
Step 3, subsequent heat treatment: being under 520 ℃ of conditions in temperature, carrying out the 4h solution treatment, is under 200 ℃ of conditions in temperature then, carries out the 48h ageing treatment, gets final product.
Implementation result: the siliceous heat resisting magnesium-rare earth alloy of the present embodiment preparation is at room temperature tensile strength 310MPa, yield strength 210MPa, unit elongation 8%; 200 ℃ of tensile strength 290MPa, yield strength 200MPa, unit elongation 14%; 100 hours deflections of creep are 0.07% under the 200 ℃/80MPa condition.
In sum, the present invention realizes obtaining excellent room temperature and hot strength and plasticity, and put forward heavy alloyed wear resistance in the resistance toheat that keeps alloy under rational rare earth element total amount, obtains the heat resistance magnesium alloy of excellent combination property.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, any content that does not break away from technical solution of the present invention, to any simple modification, equivalent variations and modification that above embodiment does, all belong to the scope of technical solution of the present invention according to technical spirit of the present invention.
Claims (10)
1. a siliceous heat resisting magnesium-rare earth alloy is characterized in that, described alloy comprises each component of following weight percent:
Gd 5～10%，
Y 2～8%，
Si 0.3～2%，
Zr 0.35～0.8%，
Wherein, the content sum of Gd and Y is 11～13%,
Impurity is less than 0.02%,
Surplus is magnesium.
2. siliceous heat resisting magnesium-rare earth alloy as claimed in claim 1 is characterized in that, each composition and the weight percent thereof of described impurity are: Fe＜0.005%, Cu＜0.005%, Ni＜0.002%, Ca＜0.01%.
3. the preparation method of a siliceous heat resisting magnesium-rare earth alloy as claimed in claim 1 is characterized in that, described method comprises: raw material preheating, melting and subsequent heat treatment:
Step 1, raw material preheating: raw material magnesium ingot, Mg-Si, Mg-Gd, Mg-Y and Mg-Zr master alloy are carried out preheating;
Step 2, melting: described melting is at flux or SF
6And CO
2Carry out under mixed gas protected, comprise the steps:
Step 2.1 adds hot smelting with magnesium ingot;
Step 2.2 after magnesium ingot melts fully, adds Mg-Si master alloy and stirring, adds successively Mg-Gd master alloy, Mg-Y master alloy, Mg-Zr master alloy again, insulation adds the refining agent refining, leaves standstill, skim, casting ladle casting or low-pressure casting get siliceous heat resisting magnesium-rare earth alloy;
Step 3, subsequent heat treatment: comprise the steps:
Described siliceous heat resisting magnesium-rare earth alloy is carried out solution treatment, ageing treatment.
4. the preparation method of siliceous heat resisting magnesium-rare earth alloy as claimed in claim 3 is characterized in that, in the step 1, described preheating temperature is 180～220 ℃.
5. the preparation method of siliceous heat resisting magnesium-rare earth alloy as claimed in claim 3 is characterized in that, in the step 2.2, treats to add the Mg-Si master alloy when magnesium liquid temp is 660～680 ℃, and churning time is 3～5 minutes; Treat to add when the magnesium liquid temp is 730～750 ℃ the Mg-Gd master alloy, go up to 730～750 ℃ of stable rear Mg-Y of adding alloys until the magnesium liquid temp, treat to add the Mg-Zr master alloy when magnesium liquid temp is 780～790 ℃, described holding temperature is 780 ℃, and soaking time is 5～15min.
6. the preparation method of siliceous heat resisting magnesium-rare earth alloy as claimed in claim 3 is characterized in that, in the step 2.2, described refining time is 5～15 minutes, described dwell temperature is 760～780 ℃, and described time of repose is 20～30 minutes, and the described temperature of skimming is 700～720 ℃.
7. the preparation method of siliceous heat resisting magnesium-rare earth alloy as claimed in claim 3 is characterized in that, in the described step 3, the temperature of described solution treatment is 480～520 ℃, and the time is 4～20h; The temperature of described ageing treatment is 200～250 ℃, and the time is 8～50h.
8. the preparation method of siliceous heat resisting magnesium-rare earth alloy as claimed in claim 3 is characterized in that, the massfraction of magnesium＞99.9% in the described magnesium ingot, and described flux and refining agent are for containing MgCl
2, KCl, CaF
2Magnesium alloy flux.
9. the preparation method of siliceous heat resisting magnesium-rare earth alloy as claimed in claim 3 is characterized in that, described SF
6And CO
2SF in the mixed gas
6Percent by volume is 0.2%.
10. the preparation method of siliceous heat resisting magnesium-rare earth alloy as claimed in claim 3 is characterized in that, follows stirring in the described refining process.
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| CN104195396A (en) * | 2014-08-04 | 2014-12-10 | 上海交通大学 | Heat-resistant rare-earth magnesium alloy containing silicon, zinc and Gd(-Y) and preparation method thereof |
| CN104928549A (en) * | 2015-06-16 | 2015-09-23 | 上海交通大学 | High-strength and high-elasticity-modulus casting Mg-RE alloy and preparation method thereof |
| CN105483485A (en) * | 2015-12-08 | 2016-04-13 | 上海交通大学 | High-strength cast magnesium alloy containing Zn and heavy rare-earth Gd and preparation method of high-strength cast magnesium alloy |
| CN105886815A (en) * | 2016-06-23 | 2016-08-24 | 陕西友力实业有限公司 | Method for preparing silicon-magnesium alloy by means of vacuum sintering |
| CN106119582A (en) * | 2016-06-23 | 2016-11-16 | 陕西友力实业有限公司 | Utilize the method that microwave sintering prepares Si-Mg alloy |
| CN109811224A (en) * | 2019-03-29 | 2019-05-28 | 南京航空航天大学 | High-toughness heat-resistant die casting Mg-Y-Er alloy and preparation method thereof |
| CN114525421A (en) * | 2022-01-25 | 2022-05-24 | 台山市中镁科技有限公司 | Magnesium alloy and preparation method and application thereof |
| CN114525421B (en) * | 2022-01-25 | 2023-03-14 | 台山市中镁科技有限公司 | Magnesium alloy and preparation method and application thereof |
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