CN111321326B - Al-RE-Y-Mg alloy and preparation method thereof - Google Patents
Al-RE-Y-Mg alloy and preparation method thereof Download PDFInfo
- Publication number
- CN111321326B CN111321326B CN202010356881.6A CN202010356881A CN111321326B CN 111321326 B CN111321326 B CN 111321326B CN 202010356881 A CN202010356881 A CN 202010356881A CN 111321326 B CN111321326 B CN 111321326B
- Authority
- CN
- China
- Prior art keywords
- alloy
- temperature
- casting
- aluminum
- strength
- 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.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Continuous Casting (AREA)
Abstract
The invention provides an Al-RE-Y-Mg alloy and a preparation method thereof, wherein the alloy comprises the following chemical components in percentage by mass: 4-10% of RE, 0.3-4% of Y, 0.2-0.4% of Mg, and the balance of Al and other inevitable impurities. Wherein RE is at least one element of La and Ce. After the Al-RE-Y-Mg alloy is subjected to pressure casting, the room-temperature tensile strength of the die-cast alloy reaches 260MPa, and the elongation is 11%; the tensile strength of the high-temperature tensile reaches 130MPa at 250 ℃, and the elongation is 19 percent; after gravity casting, the tensile strength at room temperature reaches 145MPa, and the elongation is 14%; the heat conductivity coefficient is 178W/(m.K), the alloy can be used without subsequent heat treatment, and the high-end requirement of the industries of aerospace, war industry, automobiles and the like on light weight development is met.
Description
Technical Field
The invention belongs to the field of industrial aluminum alloy and manufacturing thereof, and relates to an Al-RE-Y-Mg alloy and a preparation method thereof; in particular to a high-strength and high-toughness heat-resistant die-casting/high-heat-conductivity corrosion-resistant Al-RE-Y-Mg alloy suitable for pressure/gravity casting.
Background
The aluminum alloy is a general term of alloy taking aluminum as a matrix, has the characteristics of small density and higher strength, and has excellent specific strength. The main alloy systems include Al-Si system, Al-Cu system, Al-Mg system, and the like. The method has wide application in the fields of traffic, automobiles, mechanical manufacturing and aerospace. Particularly, the aluminum alloy used as the heat-resistant aluminum alloy for the conductor needs to have better heat resistance under the condition of ensuring good conductivity and oxidation resistance, so that the current-carrying capacity is improved and the loss is reduced. Heat resistant aluminum alloys for use in mechanical equipment are required to maintain good mechanical properties and creep fatigue resistance at relatively high temperatures. In the automotive industry, the aluminum alloy is often subjected to continuous load and vibration in the service process, which has higher requirements on creep fatigue property of parts, so that the demand of the aluminum alloy with special use requirements is higher and higher.
The rare earth is always an element for refining and strengthening in the aluminum alloy, and the high-strength Al-Zn-Mg aluminum alloy disclosed by the Chinese invention patent 201910683881.4 (a high-strength aluminum alloy) comprises the following components in percentage by weight: 5.3-5.7% of Zn, 2.2-2.6% of Mg, 1.3-1.8% of Cu, 0.2-0.5% of Si, 0.3-0.6% of Fe, 0.2-0.4% of Mn, 0.06-0.2% of Cr, 0.06-0.15% of Ce/La, 0.2-0.8% of Ag and the balance of Al. The La/Ce rare earth with the weight percentage of 0.06-0.15 is added, the formation of a rare earth strengthening phase and a dispersion strengthening phase can be remarkably promoted, the dispersion precipitation characteristics of a precipitation phase in the aluminum alloy are improved, and the compression strength and the yield strength of the aluminum alloy are remarkably improved. However, the La/Ce rare earth is added only as a microalloying element and not as a main element, and the addition amount is generally less than 1 wt%. The rare earth aluminum alloy intermediate material disclosed in Chinese patent ZL201610127881.2 (a high-strength and high-toughness rare earth aluminum alloy material and a preparation method thereof) comprises the following components in percentage by weight: 2.0 to 2.5 percent of Ce, 2.0 to 2.6 percent of La, less than or equal to 1.5 percent of Sc and the balance of Al. The mixture of Sc and La/Ce rare earth is adopted, Sc mainly acts on an Al matrix, and an Al3Sc nanometer precipitated phase is formed after heat treatment, so that the strength is improved. There is still a problem in that Sc is added in an amount of not more than 1.5 wt% as a method for increasing the strength and maintaining the elongation thereof, since Sc is expensive, it is not suitable for industrial production and mass use; on the other hand, the rare earth aluminum alloy is added as an intermediate alloy and is not used as an alloy.
In the light weight of automobiles, aluminum-silicon alloy is most used, and is widely used for producing parts such as engine cylinder bodies, cylinder covers, wheel hubs and the like at present, and the representative alloys are A354, A356 and A380. Compared with common gravity casting, the die casting has the advantages of higher die punching speed, high production rate, easy realization of mechanization and automation and forming of complex thin-wall parts. And secondly, the die casting has high dimensional accuracy and small surface roughness, and subsequent machining is less or not needed. In the automotive industry, more than 90% of key structural members use a380 alloy suitable for die casting. This is due to its good flowability and superior toughness. However, the mechanical properties and creep fatigue properties of Al-Si alloys are rapidly reduced at 200 ℃ or higher, and thus the alloys cannot be used normally. In the Al-RE system alloy taking La/Ce as the main element, the main phase is Al11RE3 phase, the high-temperature stability is far higher than that of Si phase, and the alloy also has excellent fluidity. Chinese patent 201910650876.3 (a near eutectic high-strength heat-resistant Al-Ce series aluminum alloy and a preparation method) discloses a near eutectic high-strength heat-resistant Al-Ce series aluminum alloy component: 5.00 to 15.00 percent of Ce, 0.01 to 5.00 percent of Fe, 0.10 to 1.20 percent of Mg, 0.05 to 1.00 percent of Si and 0.001 to 5.00 percent of Cu. The tensile strength of the material reaches more than 440 MPa; the tensile strength of the aluminum alloy reaches more than 250MPa at 300 ℃. The following problems still exist at present: the used process is continuous casting and rolling or rapid solidification. The process has high production cost and long production period, and large-sized parts and complex parts cannot be produced.
The castable high temperature Ce-modified aluminum alloys mentioned in International patent application WO 2017/007908A1 (castable high temperature Ce-modified aluminum alloys) disclose aluminum alloys containing an X element consisting of Ce or La, with an X content of 5-30 wt%, forming Al11X3 precipitate phase, and the disclosed compositions include Al-8Ce, Al-10Ce, Al-12Ce, all of which have yield strengths between (6.2-8.5ksi or 43-59MPa), elongations of > 8%, Al-6Ce yield strengths of 28-40MPa, Al-16Ce yield strengths of 68-70MPa, elongations of only 2.0-2.5%, Al-12Ce-0.4Mg yield strengths of 76-79MPa, elongations of only 2.5-6.0%, Al-12Ce-0.25Zr yield strengths of 45MPa, Al-12Ce-1.3Ti yield strengths of 43-47MPa, these results are consistent with the results of published papers (Z.C.Sims, D.Weiss, S.K.McCall, et al, center-Based, Intermetallic-Strength Aluminum Casting Alloy: High-Volume Co-product Development, JOM 68(7) (2016)1940-1947.) the following problems still exist: the RE formed by mixing Ce and La and the Al generated Al11RE3 phase is lath-shaped, and has a relatively thick size, so that the mechanical property of the Al-RE alloy is very low, and the yield strength is not more than 90 MPa. Al11RE3 generated by RE and Al is compatible and easy to generate segregation, a serious segregation phenomenon is generated, a coarse primary phase is formed, the performance, particularly the elongation, is seriously influenced, and the elongation of Al-16Ce is only 2-2.5%. The addition of 0.4 wt% of Mg increases the yield strength by about 20MPa, but the elongation thereof is reduced from 8.5% to 6.0%, while if the addition of an excessive amount of Mg causes a rapid increase in the solidification interval and oxidation of the melt, seriously deteriorating the casting properties. The addition of conventional refiners Zr and Ti at the same time hardly improves the yield strength. The high-toughness non-heat treatment strengthened die-casting aluminum alloy mentioned in the Chinese invention patent 201910434413.3 (a high-toughness non-heat treatment strengthened die-casting aluminum alloy and a preparation method thereof) discloses an aluminum alloy which comprises 7-10 wt% of RE, 0.05-0.5% of Mg and 0.05-0.1% of Ti. The yield strength under the casting state is more than 150MPa, the tensile strength is more than 200MPa, and the elongation is more than 10%. The following problems still exist at present: al11RE3 generated by RE and Al is compatible and easy to generate segregation, and a serious segregation phenomenon is generated, so that a coarse primary phase is formed, and the performance of the alloy is seriously influenced. The improvement of yield strength by adding a small amount of Mg is between solid solution strengthening and precipitation strengthening, namely between 5 and 20 MPa. The typical book of Light Alloys gives a Mg solid solution strengthening contribution to yield strength of about 5-15MPa (I.J. Polmear, Light Alloys: From Traditional Alloys to Nanocrystals,4th edition, Butterworth-Heinemann,2006,421, page 32). While the comparison gives example 2 (composition Al-4Ce-4La-0.25Mg-0.1Ti, yield strength 165MPa) and example 5 (composition Al-4Ce-4La-0.5Mg-0.1Ti, yield strength 170MPa), the addition of Mg also gives a yield strength increase of only 5 MPa. The addition of Ti element alone does not easily form Al3Ti as heterogeneous nucleus, and the improvement of yield performance by refinement is not obvious. Comparing the example 1 (composition Al-8Ce-0.25Mg-0.1Ti, yield strength 174MPa) and example 5 (composition Al-5Ce-5La-0.1Mg-0.1Ti, yield strength 190MPa) given it, it can be found that the addition of an additional 1% RE rare earth contributes about 10MPa to the yield strength (considering that the example 1 properties include the Mg contribution to the yield strength). Further comparing example 2 (composition Al-4Ce-4La-0.25Mg-0.1Ti, yield strength 165MPa) and example 4 (composition Al-7La-0.05Mg-0.1Ti, yield strength 150MPa), it was found that the increase in yield strength by the addition of Ti element was almost 0, considering the strength difference of 15MPa, 10MPa contributed mainly by 1% RE and 5MPa contributed by 0.2% Mg. Therefore, the addition of 0-0.5% Mg contributes about 5-20MPa to the yield strength, and the addition of Ti contributes less significantly to the strength, less than 5 MPa.
Therefore, the development of a high-strength and high-toughness heat-resistant die-casting aluminum alloy is urgently needed; in particular to a high-strength heat-resistant die-casting aluminum alloy suitable for pressure casting.
The Chinese patent 201910720696.8 (a high-strength aluminum alloy anodic oxidation electrolyte, a preparation method of a high-strength aluminum alloy anodic oxidation film and a high-strength aluminum alloy workpiece) discloses a preparation method of a high-strength aluminum alloy anodic oxidation film, and the corrosion resistance of the high-strength aluminum alloy anodic oxidation film is improved by using 0.1-0.2 mol/L phytic acid for anodic oxidation. The following problems still exist at present: firstly, the anode coating needs to adopt corrosive liquid, which is not beneficial to environmental protection; secondly, the resulting film is prone to breakage and its corrosion resistance is greatly reduced. Chinese patent 201910378236.1 (a method for preparing a medium-strength corrosion-resistant aluminum alloy plate) discloses an Al-Mg-Mn-Cr corrosion-resistant aluminum alloy, which comprises the following components of 4.0-5.0% of Mg, 0.3-1.0% of Mn, 0-0.3% of Cr, 0-0.4% of Zr and 0-0.35% of Fe. The following problems still exist at present: the Al-Mg alloy has poor casting performance and is easy to generate defects in the gravity casting process; secondly, the alloy needs subsequent hot rolling for multiple times, has huge energy consumption and can not produce large-sized pieces and complex pieces. The Chinese patent ZL201910650876.3 (a near eutectic high-strength heat-resistant Al-Ce series aluminum alloy and a preparation method) discloses a near eutectic high-strength heat-resistant Al-Ce series aluminum alloy component: 5.00 to 15.00 percent of Ce, 0.01 to 5.00 percent of Fe, 0.10 to 1.20 percent of Mg, 0.05 to 1.00 percent of Si and 0.001 to 5.00 percent of Cu. The tensile strength of the material reaches more than 440 MPa; the tensile strength of the aluminum alloy reaches more than 250MPa at 300 ℃. The following problems still exist at present: the patent adopts a continuous casting and rolling process method, so that the production cost is high and the production period is long.
There is therefore also a great need to develop a corrosion resistant aluminium alloy with high thermal conductivity suitable for gravity casting.
Disclosure of Invention
The invention provides an Al-RE-Y-Mg alloy and a preparation method thereof, aiming at solving the problem that the application of the existing cast rare earth aluminum alloy is greatly limited because the performance of the cast rare earth aluminum alloy (such as A380 and other cast aluminum alloys) can not meet the industrial requirement due to insufficient obdurability and heat resistance, and the room-temperature tensile strength of the alloy reaches 260MPa and the elongation reaches 11 percent after the alloy is subjected to pressure casting; the tensile strength of the high-temperature tensile reaches 130MPa at 250 ℃, and the elongation is 19 percent; after the alloy is cast by gravity, the tensile strength at room temperature reaches 145MPa, and the elongation reaches 14 percent; the thermal conductivity reaches 178W/(m.K).
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides an Al-RE-Y-Mg alloy which comprises the following elements in percentage by mass: 4-10% of RE, 0.3-4% of Y, 0.2-0.4% of Mg, and the balance of Al element and inevitable impurity elements.
Further, the material consists of the following elements in percentage by mass: 8-10% of RE, 0.1-3% of Y, 0.2-0.4% of Mg, and the balance of Al element and inevitable impurity elements.
Further, the RE is one or two of Ce and La.
Compared with the prior art, one of the innovative ideas of the Al-RE-Y-Mg alloy suitable for pressure/gravity casting provided by the invention is as follows: the alloy adopts the mixture of Y element and La/Ce element, and Y and La/Ce are cheap rare earth elements, on one hand, the mixture of Y element and La/Ce element can fine crystal grains well, and simultaneously can change the appearance of Al11RE3 phase to change the Al11RE3 phase from half strip shape into fiber shape, improve the segregation of Al11RE3 phase in pure Al-La/Ce alloy, and have more uniform structure and better performance. On the other hand, the mixed addition overcomes the defect that primary Al11RE3 phase is generated when the RE content is higher than 8 percent, greatly improves the elongation and the strength of the alloy, and simultaneously enlarges the addition range of the rare earth content. If the Sc and the La/Ce rare earth are mixed, the effect of Sc on refining the Al11RE3 phase is very limited. Moreover, Sc is expensive and not suitable for addition in large quantities; and the effect of Y refining Al11RE3 phase is obvious, and the action mechanism of Y and La/Ce is completely different from that of Sc.
The invention provides the second innovative idea of the Al-RE-Y-Mg alloy suitable for pressure/gravity casting as follows: the invention discovers for the first time that the amount of the strengthening phase is increased by the mixed addition of the rare earth elements and Y, so that the content of the Al11RE3 phase with high heat resistance is more and thinner, the distribution is more uniform, and the effect of high heat resistance can be exerted. The addition of Zr can also refine the Al11RE3 phase, but the amount of Zr added cannot exceed 0.3 wt.%, otherwise primary Al3Zr phase will be created. But the content of the added Y can be mixed and proportioned with La/Ce, so that a corresponding primary phase cannot be generated, the content of RE is increased from 8% to 14% (RE + Y), the content of a strengthening phase is greatly increased, and the fluidity and the casting performance of the alloy are not influenced.
The invention provides the third innovative idea of the Al-RE-Y-Mg alloy suitable for pressure/gravity casting as follows: on one hand, the RE element and the Y element have no solubility in aluminum, all intermetallic compounds are generated, and the pure aluminum and the rare earth intermetallic compounds have good heat conductivity, so that the high heat conductivity of the aluminum alloy is ensured. On the other hand, through the mixing of RE and Y elements, the metal piece compound is refined, so that the aluminum matrix is communicated, and the heat-conducting property of the aluminum matrix is also improved.
The invention provides the fourth innovative idea of the Al-RE-Y-Mg alloy suitable for pressure/gravity casting, which is as follows: and a proper amount of Mg element is added, so that the effects of solid solution strengthening and possible precipitation strengthening are realized in the alloy, the alloy has the function of fine crystal strengthening, and the strength of the alloy is further improved. The addition of a proper amount of Mg element does not influence the fluidity and the casting performance, and does not influence the elongation of the alloy.
The invention also provides a preparation method of the Al-RE-Y-Mg alloy, which comprises the following steps:
s1, calculating the consumption of the needed aluminum ingot, magnesium ingot, Al-RE intermediate alloy and Al-Y intermediate alloy according to the Al-RE-Y-Mg alloy components and the stoichiometric ratio;
s2, heating to 740-760 ℃ after the aluminum ingot is completely melted, adding the Al-RE intermediate alloy and the Al-Y intermediate alloy, keeping the temperature constant at 740-760 ℃, and stirring until the aluminum ingot is completely melted;
s3, cooling to 700-710 ℃ after the intermediate alloy is completely melted, adding the magnesium ingot, keeping the temperature constant at 700-710 ℃, stirring until the intermediate alloy is completely melted, and keeping the temperature for 25-35 minutes;
s4, adding a refining agent for refining, raising the temperature of the furnace to 745-755 ℃, preserving the temperature, standing for 10-20 minutes to promote the settlement of inclusions, and obtaining an aluminum alloy melt;
and S5, cooling the aluminum alloy melt to 700-740 ℃, skimming surface scum, and die casting the melt into a die preheated to 180-250 ℃ by a die casting machine or gravity casting to obtain the Al-RE-Y-Mg alloy.
In the step S1, oxide layers of an aluminum ingot, a magnesium ingot, an Al-RE intermediate alloy and an Al-Y intermediate alloy are removed, and the aluminum ingot, the magnesium ingot, the Al-RE intermediate alloy and the Al-Y intermediate alloy are dried and preheated to 190-210 ℃; and calculating the required dosage. The aluminum ingot is an industrial pure aluminum ingot, and the magnesium ingot is an industrial pure magnesium ingot.
In step S2, melting an aluminum ingot which accounts for 22-28% of the height of the crucible into a molten pool at 715-725 ℃, and adding the rest aluminum ingot. Adding the Al-RE and Al-Y intermediate alloy for 2-4 times.
In the step S4, when the scheme of pressure casting is adopted, 40-60 minutes before pressure casting, adding a refining agent for refining after the alloy is completely melted, heating the furnace temperature to 750 ℃, keeping the temperature and standing for 10-20 minutes to promote the settlement of impurities, and obtaining an aluminum alloy melt;
further, in step S1, the Al-RE intermediate alloy is one or both of Al-20Ce and Al-20La, and the Al-Y intermediate alloy is Al-10Y.
Further, in step S4, the refining agent comprises, by mass: 55% KCl, 30% NaCl, 15% BaCl2。
Further, in step S4, the amount of the refining agent added is 1.0 to 2.5% of the total weight of the raw material.
Further, in step S4, the refining temperature is 720 to 750 ℃, and the stirring time for the refining treatment is 10 to 15 min.
Further, in the step S5, the die casting temperature is 700-740 ℃; the casting temperature is 710-740 ℃.
Further, in step S5, the die casting speed is 1-8 m/S.
The preparation method of the Al-RE-Y-Mg alloy suitable for pressure/gravity casting provided by the invention has the advantages that: (1) RE and Y are added in the form of intermediate alloy, elements easy to burn and damage are not contained, the components are easy to control, and the smelting process is simple and easy to control; (2) the refining treatment adopts a special refining agent without MgCl2, so that the burning loss of the rare earth Y in the refining process is further reduced; (3) subsequent heat treatment is not needed, the process is simplified, and the energy utilization rate and the production efficiency are improved. (4) Ce, La and Y all belong to cheap rare earth elements, are suitable for mass production and meet industrial requirements.
Compared with the prior art, the invention has the following beneficial effects:
1) the Al-RE-Y-Mg alloy is obtained by pressure casting, the room temperature tensile strength reaches 260MPa, and the elongation is 11%; after the heat preservation is carried out for 200 hours at 250 ℃, the high-temperature tensile strength reaches 130MPa, the elongation is 19 percent, and the normal-temperature strength and the high-temperature strength are both excellent;
2) the Al-RE-Y-Mg alloy is obtained by gravity casting, has the tensile strength of 145MPa at room temperature, the elongation of 14 percent, the heat conductivity coefficient of 178W/(m.K), and excellent comprehensive performance;
3) the preparation method provided by the invention has the advantages of simple process, high efficiency, suitability for large-scale production and the like, and meets the high-end requirements of aerospace, military industry, automobiles and other industries on light weight development.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a metallographic structure diagram of a high-strength, high-toughness, heat-resistant die-cast Al-RE-Y-Mg alloy obtained by pressure casting in example 3;
FIG. 2 is a metallographic structure diagram of a high thermal conductivity and corrosion resistance Al-RE-Y-Mg alloy obtained by gravity casting in example 3;
FIG. 3 is a metallographic structure diagram of an alloy obtained by pressure casting in comparative example 2.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1
The Al-RE-Y-Mg alloy comprises the following components in percentage by weight: according to the theoretical mixture ratio, 10 wt% of Ce, 4 wt% of Y, 0.3 wt% of Mg, and the balance of Al element and inevitable impurity elements.
The preparation method comprises the following steps: (1) properly considering the burning loss, calculating the consumption of the required raw materials according to the Al-RE-Y-Mg alloy components and the stoichiometric ratio; removing oxide layer from industrial pure aluminum ingot, industrial pure magnesium ingot and Al-20Ce and Al-10Y intermediate alloyDrying and preheating to 200 ℃; calculating the consumption of the required raw materials according to the components and the stoichiometric ratio of the alloy; (2) melting an industrial pure aluminum ingot accounting for 25% of the height of the crucible into a molten pool at 720 ℃, and adding the rest aluminum ingot; (3) heating to 750 ℃ after the aluminum ingot is completely melted, adding Al-20Ce and Al-10Y intermediate alloy for 2-4 times, keeping the temperature constant at 750 ℃, stirring until the intermediate alloy is completely melted, (4) cooling to 700 ℃ after the intermediate alloy is completely melted, adding the industrial pure magnesium ingot into the melt, keeping the temperature constant at 700 ℃, stirring until the intermediate alloy is completely melted, and keeping the temperature for 30 minutes; (5) 40-60 minutes before pressure casting or gravity casting, adding a refining agent accounting for 1 percent of the weight of the raw materials for refining after the master alloy is completely melted, wherein the refining temperature is 730 ℃, the stirring time of the refining treatment is 10min, and the refining agent comprises the following components in percentage by mass: 55% KCl, 30% NaCl, 15% BaCl2Raising the furnace temperature to 750 ℃, preserving the temperature and standing for 10 minutes to promote the settlement of impurities to obtain an aluminum alloy melt; (6) cooling the aluminum alloy melt to 720 ℃, skimming surface scum, pressing the melt into a metal mold preheated to 180 ℃ by a die casting machine, and obtaining the high-strength high-toughness heat-resistant die-casting Al-RE-Y-Mg alloy at a die casting speed of 4 m/s; or pouring the melt into a metal mold die preheated to 250 ℃ through gravity casting to obtain the gravity-cast high-heat-conductivity corrosion-resistant Al-RE-Y-Mg alloy.
Respectively carrying out a-room temperature tensile test on the prepared pressure casting high-strength-toughness heat-resistant Al-RE-Y-Mg alloy;
b, carrying out high-temperature tensile property test at 200 ℃ after 200-hour heat exposure treatment at 250 ℃. In the example, the room-temperature tensile strength of the high-strength and high-toughness heat-resistant Al-RE-Y-Mg alloy is 269MPa, the yield strength is 168MPa, and the elongation is 7.5 percent; the tensile strength at high temperature of 250 ℃ is 145MPa, and the elongation is 15%.
Respectively carrying out a-room temperature tensile test on the prepared gravity casting high-thermal-conductivity corrosion-resistant Al-RE-Y-Mg alloy; b. and testing the thermal conductivity coefficient at room temperature. In the embodiment, the tensile strength at room temperature of the gravity-cast high-heat-conductivity corrosion-resistant Al-RE-Y-Mg alloy is 160MPa, the yield strength is 88MPa, and the elongation is 11.0%; the thermal conductivity is 160W/(m.K).
Example 2
The Al-RE-Y-Mg alloy comprises the following components in percentage by weight: according to the theoretical mixture ratio, 4 wt% of La, 0.3 wt% of Y, 0.2 wt% of Mg, and the balance of Al element and inevitable impurity elements.
The preparation method comprises (1) properly considering burning loss, and calculating the required raw material amount according to the Al-RE-Y alloy components and the stoichiometric ratio; removing oxide layers of an industrial pure aluminum ingot, an industrial pure magnesium ingot and Al-20La and Al-10Y intermediate alloys, drying and preheating to 200 ℃; calculating the consumption of the required raw materials according to the components and the stoichiometric ratio of the alloy; (2) melting an industrial pure aluminum ingot accounting for 25% of the height of the crucible into a molten pool at 720 ℃, and adding the rest aluminum ingot; (3) heating to 750 ℃ after the aluminum ingot is completely melted, adding Al-20La and Al-10Y intermediate alloy for 2-4 times, keeping the temperature constant at 750 ℃, stirring until the intermediate alloy is completely melted, (4) cooling to 700 ℃ after the intermediate alloy is completely melted, adding the industrial pure magnesium ingot into the melt, keeping the temperature constant at 700 ℃, stirring until the intermediate alloy is completely melted, and keeping the temperature for 30 minutes; (5) 40-60 minutes before pressure/gravity casting, adding a refining agent accounting for 2% of the weight of the raw materials for refining after the master alloy is completely melted, wherein the refining temperature is 750 ℃, the stirring time of the refining treatment is 15min, and the refining agent comprises the following components in percentage by mass: 55% KCl, 30% NaCl, 15% BaCl2Raising the furnace temperature to 750 ℃, preserving the temperature and standing for 10 minutes to promote the settlement of impurities to obtain an aluminum alloy melt; (6) cooling the aluminum alloy melt to 740 ℃, skimming surface scum, pressing the melt into a metal mold preheated to 200 ℃ by a die casting machine, and obtaining the high-strength high-toughness heat-resistant die-casting Al-RE-Y-Mg alloy at a die casting speed of 2 m/s; or pouring the melt into a metal mold die preheated to 200 ℃ through gravity casting to obtain the gravity-cast high-heat-conductivity corrosion-resistant Al-RE-Y-Mg alloy.
Respectively carrying out a-room temperature tensile test on the prepared pressure casting high-strength-toughness heat-resistant Al-RE-Y-Mg alloy; b, carrying out high-temperature tensile property test at 250 ℃ after 200-hour heat exposure treatment at 250 ℃. In the example, the room-temperature tensile strength of the high-strength and high-toughness heat-resistant Al-RE-Y-Mg alloy is 230MPa, the yield strength is 130MPa, and the elongation is 18.2%; the tensile strength at high temperature of 250 ℃ is 90MPa, and the elongation is 25%.
Respectively carrying out a-room temperature tensile test on the prepared gravity casting high-thermal-conductivity corrosion-resistant Al-RE-Y-Mg alloy; b. and testing the thermal conductivity coefficient at room temperature. In the embodiment, the tensile strength at room temperature of the gravity-cast high-heat-conductivity corrosion-resistant Al-RE-Y-Mg alloy is 130MPa, the yield strength is 73MPa, and the elongation is 19.0%; the thermal conductivity is 195W/(m.K).
Example 3
The Al-RE-Y-Mg alloy comprises the following components in percentage by weight: according to the theoretical mixture ratio, 5 wt% of La, 3 wt% of Ce, 3 wt% of Y, 0.4 wt% of Mg, and the balance of Al element and inevitable impurity elements.
The preparation method comprises (1) properly considering burning loss, and calculating the required raw material amount according to the Al-RE-Y alloy components and the stoichiometric ratio; removing oxide layers of an industrial pure aluminum ingot, an industrial pure magnesium ingot and intermediate alloys of Al-20La, Al-20Ce and Al-10Y, drying and preheating to 200 ℃; calculating the consumption of the required raw materials according to the components and the stoichiometric ratio of the alloy; (2) melting an industrial pure aluminum ingot accounting for 25% of the height of the crucible into a molten pool at 720 ℃, and adding the rest aluminum ingot; (3) heating to 750 ℃ after the aluminum ingot is completely melted, adding Al-20La, Al-20Ce and Al-10Y intermediate alloy for 2-4 times, keeping the temperature constant at 750 ℃, stirring until the intermediate alloy is completely melted, (4) cooling to 700 ℃ after the intermediate alloy is completely melted, adding the industrial pure magnesium ingot into the melt, keeping the temperature constant at 700 ℃, stirring until the intermediate alloy is completely melted, and keeping the temperature for 30 minutes; (5) 40-60 minutes before pressure/gravity casting, adding a refining agent accounting for 1.5 percent of the weight of the raw materials for refining after the master alloy is completely melted, wherein the refining temperature is 740 ℃, the stirring time of the refining treatment is 12min, and the refining agent comprises the following components in percentage by mass: 55% KCl, 30% NaCl, 15% BaCl2Raising the furnace temperature to 750 ℃, preserving the temperature and standing for 10 minutes to promote the settlement of impurities to obtain an aluminum alloy melt; (6) cooling the aluminum alloy melt to 720 ℃, skimming surface scum, pressing the melt into a metal mold preheated to 250 ℃ by a die casting machine, and obtaining the high-strength high-toughness heat-resistant die-casting Al-RE-Y-Mg alloy at the die casting speed of 1 m/s; or pouring the melt into a metal mold preheated to 250 ℃ by gravity casting to obtain the gravity castingHigh heat-conducting corrosion-resistant Al-RE-Y-Mg alloy.
Respectively carrying out a-room temperature tensile test on the prepared pressure casting high-strength-toughness heat-resistant Al-RE-Y-Mg alloy; b, carrying out high-temperature tensile property test at 250 ℃ after 200-hour heat exposure treatment at 250 ℃. In the example, the room-temperature tensile strength of the high-strength and high-toughness heat-resistant Al-RE-Y-Mg alloy is 260MPa, the yield strength is 145MPa, and the elongation is 11%; the tensile strength at high temperature of 250 ℃ is 130MPa, and the elongation is 19%. As shown in a metallographic structure diagram of the alloy in FIG. 1, as can be seen from FIG. 1, eutectic Al11RE3 phase in the structure is uniformly and finely distributed, and a primary Al11RE3 phase hardly exists, so that the alloy has good heat resistance and strength. The presence of rosette pure aluminum dendrites in the crystalline phase provides the alloy with high toughness.
Respectively carrying out a-room temperature tensile test on the prepared gravity casting high-thermal-conductivity corrosion-resistant Al-RE-Y-Mg alloy; b. and testing the thermal conductivity coefficient at room temperature. In the embodiment, the tensile strength at room temperature of the gravity-cast high-heat-conductivity corrosion-resistant Al-RE-Y-Mg alloy is 145MPa, the yield strength is 85MPa, and the elongation is 14.0%; thermal conductivity 178W/(m.K). As shown in FIG. 2, the metallographic structure of the alloy is shown in FIG. 2, and it is understood from FIG. 2 that the primary Al11RE3 phase is hardly present in the structure and the aluminum dendrites are dendritic. The Al11RE3 phase in the eutectic structure is uniformly distributed and has certain dendritic characteristics. This allows the Al in the alloy to be connected with each other, and has excellent heat conductivity and good elongation.
Example 4
The Al-RE-Y-Mg alloy comprises the following components in percentage by weight: according to the theoretical mixture ratio, 8 wt% of La, 1 wt% of Ce, 2 wt% of Y, 0.2 wt% of Mg, and the balance of Al element and inevitable impurity elements.
The preparation method comprises (1) properly considering burning loss, and calculating the required raw material amount according to the Al-RE-Y alloy components and the stoichiometric ratio; removing oxide layers of an industrial pure aluminum ingot, an industrial pure magnesium ingot and intermediate alloys of Al-20La, Al-20Ce and Al-10Y, drying and preheating to 200 ℃; calculating the consumption of the required raw materials according to the components and the stoichiometric ratio of the alloy; (2) melting an industrial pure aluminum ingot accounting for 25% of the height of the crucible into a molten pool at 720 ℃, and adding the rest aluminum ingot; (3) after the aluminum ingot is completely melted, the temperature is raised to 750 ℃, and Al-20La and Al-Adding 20Ce and Al-10Y intermediate alloy for 2-4 times, keeping the temperature constant at 750 ℃, stirring until the intermediate alloy is completely melted, (4) cooling to 700 ℃ after the intermediate alloy is completely melted, adding industrial pure magnesium ingot into the melt, keeping the temperature constant at 700 ℃, stirring until the intermediate alloy is completely melted, and keeping the temperature for 30 minutes; (5) 40-60 minutes before pressure/gravity casting, adding a refining agent accounting for 2.5 percent of the weight of the raw materials for refining after the master alloy is completely melted, wherein the refining temperature is 750 ℃, the stirring time of the refining treatment is 10min, and the refining agent comprises the following components in percentage by mass: 55% KCl, 30% NaCl, 15% BaCl2Raising the furnace temperature to 750 ℃, preserving the temperature and standing for 10 minutes to promote the settlement of impurities to obtain an aluminum alloy melt; (6) cooling the aluminum alloy melt to 720 ℃, skimming surface scum, pressing the melt into a metal mold preheated to 240 ℃ by a die casting machine, and obtaining the high-strength high-toughness heat-resistant die-casting Al-RE-Y-Mg alloy at a die casting speed of 5 m/s; or pouring the melt into a metal mold die preheated to 240 ℃ through gravity casting to obtain the gravity-cast high-heat-conductivity corrosion-resistant Al-RE-Y-Mg alloy.
Respectively carrying out a-room temperature tensile test on the prepared pressure casting high-strength-toughness heat-resistant Al-RE-Y-Mg alloy; b, carrying out high-temperature tensile property test at 250 ℃ after 200-hour heat exposure treatment at 250 ℃. In the example, the room-temperature tensile strength of the high-strength and high-toughness heat-resistant Al-RE-Y-Mg alloy is 240MPa, the yield strength is 135MPa, and the elongation is 12%; the tensile strength at high temperature of 250 ℃ is 125MPa, and the elongation is 18%.
Respectively carrying out a-room temperature tensile test on the prepared gravity casting high-thermal-conductivity corrosion-resistant Al-RE-Y-Mg alloy; b. and testing the thermal conductivity coefficient at room temperature. In the embodiment, the tensile strength at room temperature of the gravity-cast high-heat-conductivity corrosion-resistant Al-RE-Y-Mg alloy is 135MPa, the yield strength is 78MPa, and the elongation is 16.0 percent; thermal conductivity 181W/(m.K).
Example 5
The Al-RE-Y-Mg alloy comprises the following components in percentage by weight: according to the theoretical mixture ratio, 10 wt% of La, 1 wt% of Y, 0.3 wt% of Mg, and the balance of Al element and inevitable impurity elements.
The preparation method comprises (1) properly considering burning loss, alloying according to the above Al-RE-YDividing the stoichiometric ratio, and calculating the consumption of the required raw materials; removing oxide layers of an industrial pure aluminum ingot, an industrial pure magnesium ingot and Al-20La and Al-10Y intermediate alloys, drying and preheating to 200 ℃; calculating the consumption of the required raw materials according to the components and the stoichiometric ratio of the alloy; (2) melting an industrial pure aluminum ingot accounting for 25% of the height of the crucible into a molten pool at 720 ℃, and adding the rest aluminum ingot; (3) heating to 750 ℃ after the aluminum ingot is completely melted, adding Al-20La and Al-10Y intermediate alloy for 2-4 times, keeping the temperature constant at 750 ℃, stirring until the intermediate alloy is completely melted, (4) cooling to 700 ℃ after the intermediate alloy is completely melted, adding the industrial pure magnesium ingot into the melt, keeping the temperature constant at 700 ℃, stirring until the intermediate alloy is completely melted, and keeping the temperature for 30 minutes; (5) 40-60 minutes before pressure/gravity casting, adding a refining agent accounting for 1 percent of the weight of the raw materials for refining after the master alloy is completely melted, wherein the refining temperature is 720 ℃, the stirring time of the refining treatment is 10min, and the refining agent comprises the following components in percentage by mass: 55% KCl, 30% NaCl, 15% BaCl2Raising the furnace temperature to 750 ℃, preserving the temperature and standing for 10 minutes to promote the settlement of impurities to obtain an aluminum alloy melt; (6) cooling the aluminum alloy melt to 740 ℃, skimming surface scum, pressing the melt into a metal mold preheated to 250 ℃ by a die casting machine, and obtaining the high-strength high-toughness heat-resistant die-casting Al-RE-Y-Mg alloy at the die casting speed of 8 m/s; or pouring the melt into a metal mold die preheated to 250 ℃ through gravity casting to obtain the gravity-cast high-heat-conductivity corrosion-resistant Al-RE-Y-Mg alloy.
Respectively carrying out a-room temperature tensile test on the prepared pressure casting high-strength-toughness heat-resistant Al-RE-Y-Mg alloy; b, carrying out high-temperature tensile property test at 250 ℃ after 200-hour heat exposure treatment at 250 ℃. In the example, the room-temperature tensile strength of the high-strength and high-toughness heat-resistant Al-RE-Y-Mg alloy is 265MPa, the yield strength is 141MPa, and the elongation is 9.2%; the tensile strength at high temperature of 250 ℃ is 128MPa, and the elongation is 16%.
Respectively carrying out a-room temperature tensile test on the prepared gravity casting high-thermal-conductivity corrosion-resistant Al-RE-Y-Mg alloy; b. and testing the thermal conductivity coefficient at room temperature. In the embodiment, the tensile strength at room temperature of the gravity-cast high-heat-conductivity corrosion-resistant Al-RE-Y-Mg alloy is 138MPa, the yield strength is 80MPa, and the elongation is 15.0%; the thermal conductivity is 180W/(m.K).
Comparative example 1
The comparative example provides an alloy comprising, by weight: according to the theoretical mixture ratio, 4 wt% of La, 0.3 wt% of Ti, 0.2 wt% of Mg, and the balance of Al element and inevitable impurity elements. The composition and preparation are essentially the same as in example 2, except that: in this comparative example 0.3 wt% Ti was added instead of 0.3 wt% Y added in example 2.
Respectively carrying out a-room temperature tensile test on the prepared pressure casting alloy; b, carrying out high-temperature tensile property test at 250 ℃ after 200-hour heat exposure treatment at 250 ℃. In the comparative example, the tensile strength of the alloy at room temperature is 150MPa, the yield strength is 105MPa, and the elongation is 10.9 percent; the tensile strength at high temperature of 250 ℃ is 62MPa, and the elongation is 20%.
Respectively carrying out a-room temperature tensile test on the prepared gravity casting alloy; b. and testing the thermal conductivity coefficient at room temperature. In the comparative example, the tensile strength of the alloy at room temperature is 110MPa, the yield strength is 59MPa, and the elongation is 17.0 percent; the thermal conductivity is 150W/(m.K).
Comparative example 2
The comparative example provides an alloy comprising, by weight: according to the theoretical mixture ratio, 5 wt% of La, 3 wt% of Ce, 0.2 wt% of Ti, 0.4 wt% of Mg, and the balance of Al element and inevitable impurity elements. The composition and preparation are essentially the same as in example 3, except that: in this comparative example 0.2 wt% Ti was added instead of 3 wt% Y added in example 3.
Respectively carrying out a-room temperature tensile test on the prepared pressure casting alloy; b, carrying out high-temperature tensile property test at 250 ℃ after 200-hour heat exposure treatment at 250 ℃. In the comparative example, the tensile strength of the alloy at room temperature is 190MPa, the yield strength is 125MPa, and the elongation is 10 percent; the tensile strength at high temperature of 250 ℃ is 70MPa, and the elongation is 18%.
The metallographic structure diagram of the alloy is shown in fig. 3, and a primary Al11RE3 phase exists in the structure, so that the eutectic phase is seriously segregated and is in a lath shape, and the performance of the alloy is influenced.
The above description is a detailed description of specific embodiments of the present invention. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (9)
1. An Al-RE-Y-Mg alloy for pressure/gravity casting is characterized by comprising the following elements in percentage by mass: 4-10% of RE, 1-4% of Y, 0.2-0.4% of Mg, and the balance of Al element and inevitable impurity elements; the RE is one or the combination of two of Ce and La.
2. The Al-RE-Y-Mg alloy of claim 1, consisting of, in mass percent: 8-10% of RE, 1-4% of Y, 0.2-0.4% of Mg, and the balance of Al element and inevitable impurity elements.
3. A method for producing the Al-RE-Y-Mg alloy according to claim 1 or 2, characterized in that it comprises the following steps:
s1, calculating the consumption of the needed aluminum ingot, magnesium ingot, Al-RE intermediate alloy and Al-Y intermediate alloy according to the Al-RE-Y-Mg alloy components and the stoichiometric ratio;
s2, heating to 740-760 ℃ after the aluminum ingot is completely melted, adding the Al-RE intermediate alloy and the Al-Y intermediate alloy, keeping the temperature constant at 740-760 ℃, and stirring until the aluminum ingot is completely melted;
s3, cooling to 700-710 ℃ after the intermediate alloy is completely melted, adding the magnesium ingot, keeping the temperature constant at 700-710 ℃, stirring until the intermediate alloy is completely melted, and keeping the temperature for 25-35 minutes;
s4, adding a refining agent for refining, raising the temperature of the furnace to 745-755 ℃, preserving the temperature, standing for 10-20 minutes to promote the settlement of inclusions, and obtaining an aluminum alloy melt;
and S5, cooling the aluminum alloy melt to 700-740 ℃, skimming surface scum, and die casting the melt into a die preheated to 180-250 ℃ by a die casting machine or gravity casting to obtain the Al-RE-Y-Mg alloy.
4. The method of claim 3, wherein in step S1, the Al-RE intermediate alloy is one or both of Al-20Ce and Al-20La, and the Al-Y intermediate alloy is Al-10Y.
5. The method for preparing the Al-RE-Y-Mg alloy according to claim 3, wherein in step S4, the refining agent comprises the following components in percentage by mass: 55% KCl, 30% NaCl, 15% BaCl2。
6. The method of manufacturing the Al-RE-Y-Mg alloy according to claim 3, wherein in step S4, the amount of the refining agent added is 1.0-2.5% by weight of the total weight of the raw materials.
7. The method of claim 3, wherein in step S4, the refining temperature is 720-750 ℃, and the stirring time for the refining treatment is 10-15 min.
8. The method for preparing the Al-RE-Y-Mg alloy according to claim 3, wherein in step S5, the die casting temperature is 700-740 ℃; the casting temperature is 710-740 ℃.
9. The method of producing an Al-RE-Y-Mg alloy according to claim 3, wherein in step S5, the die casting speed is 1 to 8 m/S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010356881.6A CN111321326B (en) | 2020-04-29 | 2020-04-29 | Al-RE-Y-Mg alloy and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010356881.6A CN111321326B (en) | 2020-04-29 | 2020-04-29 | Al-RE-Y-Mg alloy and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111321326A CN111321326A (en) | 2020-06-23 |
| CN111321326B true CN111321326B (en) | 2022-03-01 |
Family
ID=71173547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010356881.6A Active CN111321326B (en) | 2020-04-29 | 2020-04-29 | Al-RE-Y-Mg alloy and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111321326B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112795818A (en) * | 2020-12-30 | 2021-05-14 | 上海交通大学 | High-strength heat-resistant rare earth aluminum alloy manufactured by laser additive manufacturing and preparation method thereof |
| CN112831694B (en) * | 2020-12-30 | 2022-12-20 | 上海交通大学 | Rare earth aluminum alloy powder suitable for additive manufacturing and preparation method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301878A (en) * | 1999-12-28 | 2001-07-04 | 中国科学院力学研究所 | Rare earth aluminium alloy for thermal dip plating of steel |
| US6416882B1 (en) * | 1997-11-03 | 2002-07-09 | Siemens Aktiengesellschaft | Protective layer system for gas turbine engine component |
| CN104818411A (en) * | 2015-05-21 | 2015-08-05 | 广西友合铝材有限公司 | Rare-earth aluminum-magnesium alloy material and preparation method thereof |
| CN106906386A (en) * | 2017-03-17 | 2017-06-30 | 北京科技大学 | A kind of method of regulation and control Al La strength of alloy and plasticity |
| CN108559874A (en) * | 2017-12-28 | 2018-09-21 | 上海交通大学 | A kind of heat-resistant aluminum alloy wire of high-strength highly-conductive and preparation method thereof |
| CN110106401A (en) * | 2019-05-23 | 2019-08-09 | 上海交通大学 | A kind of high tough non-heat treated reinforcing pack alloy and preparation method thereof |
| CN110343912A (en) * | 2019-07-18 | 2019-10-18 | 上海交通大学 | A kind of rare-earth heat-resistant aluminium alloy conductor material and preparation method |
| CN110484757A (en) * | 2019-07-18 | 2019-11-22 | 上海交通大学 | A kind of high conductivity and heat heat resistance in-situ authigenic aluminum matrix composite and preparation method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170362687A1 (en) * | 2016-06-16 | 2017-12-21 | Ut-Battelle, Llc | Structural direct-write additive manufacturing of molten metals |
-
2020
- 2020-04-29 CN CN202010356881.6A patent/CN111321326B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6416882B1 (en) * | 1997-11-03 | 2002-07-09 | Siemens Aktiengesellschaft | Protective layer system for gas turbine engine component |
| CN1301878A (en) * | 1999-12-28 | 2001-07-04 | 中国科学院力学研究所 | Rare earth aluminium alloy for thermal dip plating of steel |
| CN104818411A (en) * | 2015-05-21 | 2015-08-05 | 广西友合铝材有限公司 | Rare-earth aluminum-magnesium alloy material and preparation method thereof |
| CN106906386A (en) * | 2017-03-17 | 2017-06-30 | 北京科技大学 | A kind of method of regulation and control Al La strength of alloy and plasticity |
| CN108559874A (en) * | 2017-12-28 | 2018-09-21 | 上海交通大学 | A kind of heat-resistant aluminum alloy wire of high-strength highly-conductive and preparation method thereof |
| CN110106401A (en) * | 2019-05-23 | 2019-08-09 | 上海交通大学 | A kind of high tough non-heat treated reinforcing pack alloy and preparation method thereof |
| CN110343912A (en) * | 2019-07-18 | 2019-10-18 | 上海交通大学 | A kind of rare-earth heat-resistant aluminium alloy conductor material and preparation method |
| CN110484757A (en) * | 2019-07-18 | 2019-11-22 | 上海交通大学 | A kind of high conductivity and heat heat resistance in-situ authigenic aluminum matrix composite and preparation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111321326A (en) | 2020-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111378875B (en) | High-thermal-conductivity corrosion-resistant Al-RE-Y-Zr alloy suitable for gravity casting and preparation method thereof | |
| CN110029250B (en) | High-elongation heat-resistant cast aluminum alloy and pressure casting preparation method thereof | |
| CN109972003B (en) | High-elongation heat-resistant aluminum alloy suitable for gravity casting and preparation method thereof | |
| CN111411268B (en) | High-strength-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting and preparation method thereof | |
| CN115261684A (en) | Cast Al-Si alloy and preparation method thereof | |
| CN109807302B (en) | High-strength high-toughness heat-resistant die-casting Mg-Gd alloy and preparation method thereof | |
| CN110512122B (en) | Graphene composite rare earth modified hypoeutectic Al-Si-Mg casting alloy and preparation method thereof | |
| CN110079711B (en) | Heat-resistant high-pressure cast Al-Si-Ni-Cu aluminum alloy and preparation method thereof | |
| CN111321326B (en) | Al-RE-Y-Mg alloy and preparation method thereof | |
| CN114457263A (en) | High-strength high-toughness high-heat-conductivity die-casting aluminum alloy and manufacturing method thereof | |
| CN102002617B (en) | Cast aluminum alloy for automobile and preparation method thereof | |
| CN109930045B (en) | High-strength-toughness heat-resistant Mg-Gd alloy suitable for gravity casting and preparation method thereof | |
| CN112921209A (en) | Ultrahigh-heat-conductivity high-plasticity medium-strength aluminum alloy and preparation method thereof | |
| CN110947762A (en) | Preparation method of 308 aluminum alloy three-layer composite plate for vacuum brazing | |
| CN107937764B (en) | Liquid die forging high-strength and high-toughness aluminum alloy and liquid die forging method thereof | |
| CN112609109A (en) | Ce-Mg-containing high-strength heat-resistant aluminum alloy and preparation method thereof | |
| CN116590583A (en) | High-strength and high-toughness cast aluminum alloy material and preparation method thereof | |
| CN117026023A (en) | Heat-treatment-free high-strength high-toughness die-casting aluminum alloy and preparation method thereof | |
| CN109852859B (en) | High-strength-toughness heat-resistant Mg-Y-Er alloy suitable for gravity casting and preparation method thereof | |
| CN111485139B (en) | Al-RE-Y alloy and preparation method thereof | |
| CN114457266A (en) | Ultrahigh-strength and toughness cast aluminum alloy and forming method thereof | |
| CN101597708B (en) | Al-Mg-Nd-Sc aluminium alloy | |
| WO2024139526A1 (en) | Aluminum alloy, part prepared from same, and vehicle comprising part | |
| CN109881064B (en) | High-strength high-toughness heat-resistant die-casting Mg-Gd-Y alloy and preparation method thereof | |
| CN109868402B (en) | High-strength-toughness heat-resistant die-casting Mg-Y alloy and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |