CN111411268B - High-strength-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting and preparation method thereof - Google Patents
High-strength-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting and preparation method thereof Download PDFInfo
- Publication number
- CN111411268B CN111411268B CN202010356884.XA CN202010356884A CN111411268B CN 111411268 B CN111411268 B CN 111411268B CN 202010356884 A CN202010356884 A CN 202010356884A CN 111411268 B CN111411268 B CN 111411268B
- Authority
- CN
- China
- Prior art keywords
- alloy
- strength
- resistant
- pressure casting
- temperature
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
-
- 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)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Continuous Casting (AREA)
Abstract
The invention provides a high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting and a preparation method thereof, wherein the alloy comprises the following elements in percentage by mass: 3-11% of RE, 0.1-5% of Y, 0.1-0.4% of Mg, 0.01-0.5% of Zr, and the balance of Al element and inevitable impurity elements; wherein RE is at least one element of La and Ce. After the high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy is subjected to pressure casting, the room-temperature tensile strength of the die-cast alloy is up to 275MPa, and the elongation is up to 19.5%; the tensile strength at high temperature of 250 ℃ reaches 134MPa, the elongation reaches 25%, the alloy can be used without subsequent heat treatment, and the high-end requirement of industries such as aerospace, military industry and automobiles on light weight development is met.
Description
Technical Field
The invention belongs to the technical field of industrial aluminum alloy and manufacturing thereof, relates to an Al-RE-Y-Zr alloy and a preparation method thereof, and particularly relates to a high-strength-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting and a preparation method thereof.
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 disclosed in the 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. 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 alloy mentioned in International patent publication WO 2017/007908A1 (castable high temperature Ce-modified aluminum alloy) discloses an aluminum alloy containing an X element consisting of Ce or La, with an X content of 5-30 wt%, forming Al11X3 precipitate phase, and disclosed compositions including Al-8Ce, Al-10Ce, Al-12Ce, all of which have yield strengths between (6.2-8.5ksi or 43-59MPa), an elongation of > 8%, Al-6Ce yield strength of 28-40MPa, Al-16Ce yield strength of 68-70MPa, an elongation of only 2.0-2.5%, Al-12Ce-0.4Mg yield strength of 76-79MPa, an elongation of only 2.5-6.0%, Al-12Ce-0.25Zr yield strength of 45MPa, Al-12Ce-1.3Ti yield strength of 43-47MPa, these results are consistent with the results of the 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 at present: 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 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 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.
Disclosure of Invention
The invention provides a high-strength-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting 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 aluminum alloy such as A380 and the like cannot be achieved due to insufficient strength, toughness and heat resistance, and the like, and the alloy has the room-temperature tensile strength of 275MPa, the yield strength of 175MPa and the elongation of 19.5 percent after pressure casting; the tensile strength of the high-temperature tensile at 250 ℃ is up to 134MPa, and the elongation is up to 25%.
The purpose of the invention is realized by the following technical scheme:
the invention provides a high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting, which comprises the following elements in percentage by mass: 3 to 11% of RE, 0.1 to 5% of Y, 0.1 to 0.4% of Mg, 0.01 to 0.5% of Zr, the balance being Al element and unavoidable impurity elements.
Preferably, the high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting comprises the following elements in percentage by mass: 8 to 11% of RE, 1.0 to 3% of Y, 0.1 to 0.4% of Mg, 0.01 to 0.3% of Zr and the balance of Al.
Preferably, the component of RE is one or a combination of two of La and Ce.
Compared with the prior art, one of the innovative ideas of providing the high-strength-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting 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.
The invention provides the second innovative idea of high-strength-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting, which is as follows: the quantity of the strengthening phases is increased by the mixed addition of the rare earth elements, so that the high-heat-resistance Al11RE3 phase has more content, is thinner and is more uniformly distributed, and the high-heat-resistance effect of the high-heat-resistance Al11RE3 phase 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 (rare earth) is increased from 8% to RE + Y16%, 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 high-strength-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting, which is as follows: and a proper amount of Mg element is added to realize the effects of solid solution strengthening and possible precipitation strengthening in the alloy, thereby further improving the strength of the alloy. 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 provides the fourth innovative idea of high-strength-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting, which is as follows: the invention firstly discovers that the addition of Zr element in Al-Ce series die-casting aluminum alloy can obviously refine crystal grains and improve the strength of the aluminum alloy. On one hand, Zr can refine the Al11RE3 phase, so that the Al11RE3 phase is distributed more uniformly, and the comprehensive performance of the alloy is improved. On the other hand, intermetallic compounds generated by Zr have higher melting points and are positioned at grain boundaries, and the heat resistance of the aluminum alloy can be improved for the first time.
The invention provides a preparation method of high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting, which comprises the following steps:
(1) properly considering the burning loss, calculating the consumption of the required raw materials according to the Al-RE-Y-Zr alloy components and the stoichiometric ratio; removing oxide layers of industrial pure aluminum ingots, industrial pure magnesium ingots, Al-RE, Al-Y and Al-Zr intermediate alloys, and drying and preheating to 220 ℃ of 180 ℃; 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 of the industrial pure aluminum ingot;
(3) after the industrial pure aluminum ingot is completely melted, heating to 750 ℃, adding Al-RE, Al-Y and Al-Zr intermediate alloys for 2-4 times, keeping the temperature constant at 750 ℃, and stirring until the industrial pure aluminum ingot is completely melted;
(4) after the alloy is completely melted, cooling to 700-710 ℃, adding an industrial pure magnesium ingot into the melt, keeping the temperature constant at 700-710 ℃, stirring until the alloy is completely melted, and keeping the temperature for 30 minutes; adding a refining agent for refining, heating the furnace to 750 ℃, preserving heat and standing for 10-20 minutes to promote impurity settlement, and obtaining an aluminum alloy melt;
(5) adding a refining agent for refining 40-60 minutes before pressure casting when the alloy is completely melted, heating the furnace temperature to 750 ℃, preserving the temperature, standing for 10-20 minutes to promote the settlement of impurities and obtain an aluminum alloy melt;
(6) and cooling the aluminum alloy melt to 720-740 ℃, skimming surface scum, pressing the melt into a die preheated to 180-250 ℃ through a die casting machine, and thus obtaining the high-strength high-toughness heat-resistant die-casting Al-RE-Y-Zr alloy.
Preferably, in the step (1), the Al-RE intermediate alloy is Al-20Ce, Al-20La or aluminum mixed rare earth intermediate alloy; the Al-Y intermediate alloy is Al-10Y, and the Al-Zr intermediate alloy is Al-5 Zr.
Preferably, in the step (5), the refining agent comprises the following components in percentage by mass: 55% KCl, 30% NaCl, 15% BaCl2。
Preferably, in the step (5), the addition amount of the refining agent is 1.0-2.5% of the total weight of the alloy raw materials.
Preferably, in the step (5), the refining temperature is 720-750 ℃, and the stirring time of the refining treatment is 10-15 min.
Preferably, in the step (6), the casting temperature is 710-740 ℃.
Preferably, in the step (6), the die casting speed is 1-8 m/s.
The preparation method of the high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting has the beneficial effects 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 MgCl-free2The special refining agent further reduces the burning loss of the rare earth Y in the refining process; (3) subsequent heat treatment is not needed, the process is simplified, and the energy utilization rate and the production efficiency are improved.
Compared with the prior art, the invention has the following beneficial effects:
1) the high heat-resistant alloy suitable for pressure casting has the room-temperature tensile strength as high as 275MPa and the elongation as high as 19.5 percent; after the heat preservation is carried out for 200 hours at 250 ℃, the high-temperature tensile strength is as high as 134MPa, the elongation is as high as 25%, and the comprehensive performance is excellent;
2) according to the invention, the Y element and the La/Ce element are mixed and added, so that the generation of primary Al11RE3 phase when the RE content is higher than 8% is overcome, the elongation and strength of the alloy are greatly improved, and the addition range of the rare earth content is expanded;
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 photograph of the structure of a high-toughness heat-resistant Al-RE-Y-Zr alloy obtained by pressure casting in example 4 of the present invention.
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 high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting comprises the following components in percentage by weight: according to the theoretical mixture ratio, 11 wt% of Ce, 5 wt% of Y, 0.3 wt% of Mg, 0.01 wt% of Zr, 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 industrial pure aluminum ingots, industrial pure magnesium ingots, Al-20Ce, Al-10Y and Al-5Zr intermediate alloys, and drying and preheating to 220 ℃ of 180-; 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, Al-10Y and Al-5Zr intermediate alloys for 2-4 times, keeping the temperature constant at 750 ℃, stirring until the intermediate alloys are completely melted, (4) cooling to 700 ℃ after the intermediate alloys are completely melted, adding the industrial pure magnesium ingot into the melt, keeping the temperature constant at 700 ℃, stirring until the intermediate alloys are completely melted, and keeping the temperature for 30 minutes; (5) 40-60 minutes before pressure 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 15 minutes, 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 pressingThe high-strength and high-toughness heat-resistant die-casting Al-RE-Y-Zr alloy is obtained at the casting speed of 4 m/s.
Respectively carrying out a-room temperature tensile test on the prepared high-strength high-toughness heat-resistant Al-RE-Y-Zr 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-Zr alloy is 275MPa, the yield strength is 175MPa, and the elongation is 7.3 percent; the tensile strength at high temperature of 250 ℃ is 150MPa, and the elongation is 15%.
Example 2
The high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting comprises the following components in percentage by weight: 3 wt% of La, 0.2 wt% of Y, 0.1 wt% of Mg, 0.08 wt% of Zr, and the balance of Al element and inevitable impurity elements according to the theoretical mixture ratio.
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 industrial pure aluminum ingots, industrial pure magnesium ingots, Al-20Ce, Al-10Y and Al-5Zr intermediate alloys, and drying and preheating to 220 ℃ of 180-; 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, heating to 750 ℃, adding the Al-20Ce, Al-10Y and Al-5Zr intermediate alloys for 2-4 times, keeping the temperature constant at 750 ℃, stirring until the intermediate alloys are completely melted, and keeping the temperature for 30 minutes; (4) after the intermediate alloy is completely melted, cooling to 700 ℃, 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, 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 refining treatment is 12 minutes, 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 machineThe high-strength and high-toughness heat-resistant die-casting Al-RE-Y-Zr alloy is obtained at the die-casting speed of 2 m/s.
Respectively carrying out a-room temperature tensile test on the prepared high-strength high-toughness heat-resistant Al-RE-Y-Zr 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-Zr alloy is 230MPa, the yield strength is 132MPa, and the elongation is 19.5%; the tensile strength at high temperature of 250 ℃ is 90MPa, and the elongation is 25%.
Example 3
The high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting 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, 0.2 wt% of Mg, 0.2 wt% of Zr, 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 industrial pure aluminum ingots, industrial pure magnesium ingots and intermediate alloys of Al-20La, Al-20Ce, Al-10Y and Al-5Zr, and drying and preheating to 220 ℃; 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 the intermediate alloy of Al-20La, Al-20Ce, Al-10Y and Al-5Zr 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, 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 10 minutes, 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 gold preheated to 250 ℃ by a die casting machineIn the type I die, the high-strength and high-toughness heat-resistant die-casting Al-RE-Y-Zr alloy is obtained at the die-casting speed of 1 m/s.
Respectively carrying out a-room temperature tensile test on the prepared high-strength high-toughness heat-resistant Al-RE-Y-Zr 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-Zr alloy is 269MPa, the yield strength is 153MPa, and the elongation is 11%; the tensile strength at high temperature of 250 ℃ is 134MPa, and the elongation is 20%.
Example 4
The high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting 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, 0.5 wt% of Zr, 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 industrial pure aluminum ingots, industrial pure magnesium ingots and intermediate alloys of Al-20La, Al-20Ce, Al-10Y and Al-5Zr, and drying and preheating to 220 ℃; 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 the intermediate alloy of Al-20La, Al-20Ce, Al-10Y and Al-5Zr 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, 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 10 minutes, 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 the preheated melt by a die casting machineThe high-strength and high-toughness heat-resistant die-casting Al-RE-Y-Zr alloy is obtained in a metal die with the temperature of 240 ℃ and the die-casting speed of 5m/s, and the structure photograph is shown in figure 1.
Respectively carrying out a-room temperature tensile test on the prepared high-strength high-toughness heat-resistant Al-RE-Y-Zr 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-Zr alloy is 238MPa, the yield strength is 137MPa, and the elongation is 13%; the tensile strength at high temperature of 250 ℃ is 120MPa, and the elongation is 14%.
Example 5
The high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting comprises the following components in percentage by weight: according to the theoretical mixture ratio, 11 wt% of La, 1 wt% of Y, 0.3 wt% of Mg, 0.3 wt% of Zr, 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 industrial pure aluminum ingots, industrial pure magnesium ingots, Al-20La, Al-10Y and Al-5Zr intermediate alloys, and drying and preheating to 220 ℃ of 180-; 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-10Y and Al-5Zr intermediate alloys for 2-4 times, keeping the temperature constant at 750 ℃, stirring until the intermediate alloys are completely melted, (4) cooling to 700 ℃ after the intermediate alloys are completely melted, adding the industrial pure magnesium ingot into the melt, keeping the temperature constant at 700 ℃, stirring until the intermediate alloys are completely melted, and keeping the temperature for 30 minutes; (5) 40-60 minutes before pressure 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 10 minutes, 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, and carrying out die casting on the melt by using a die casting machinePressing into a metal die preheated to 250 ℃, and obtaining the high-strength high-toughness heat-resistant die-casting Al-RE-Y-Zr alloy at the die-casting speed of 8 m/s.
Respectively carrying out a-room temperature tensile test on the prepared high-strength high-toughness heat-resistant Al-RE-Y-Zr 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-Zr alloy is 273MPa, the yield strength is 156MPa, and the elongation is 10 percent; the tensile strength at high temperature of 250 ℃ is 135MPa, and the elongation is 18%.
Example 6
The high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting comprises the following components in percentage by weight: according to the theoretical mixture ratio, 10 wt% of La, 0.1 wt% of Y, 0.3 wt% of Mg, 0.01 wt% of Zr, and the balance of Al element and inevitable impurity elements.
This example was prepared in the same manner as example 5.
Respectively carrying out a-room temperature tensile test on the prepared high-strength high-toughness heat-resistant Al-RE-Y-Zr 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-Zr alloy is 220MPa, the yield strength is 140MPa, and the elongation is 7.5%; the tensile strength at high temperature of 250 ℃ is 119MPa, and the elongation is 14%.
Example 7
The high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting comprises the following components in percentage by weight: according to the theoretical mixture ratio, 7 wt% of La, 1 wt% of Y, 0.3 wt% of Mg, 0.3 wt% of Zr, and the balance of Al element and inevitable impurity elements.
This example was prepared in the same manner as example 5.
Respectively carrying out a-room temperature tensile test on the prepared high-strength high-toughness heat-resistant Al-RE-Y-Zr 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-Zr alloy is 238MPa, the yield strength is 135MPa, and the elongation is 12%; the tensile strength at high temperature of 250 ℃ is 95MPa, and the elongation is 20%.
Example 8
The high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting comprises the following components in percentage by weight: according to the theoretical mixture ratio, 11 wt% of La, 0.5 wt% of Y, 0.3 wt% of Mg, 0.3 wt% of Zr, and the balance of Al element and inevitable impurity elements.
This example was prepared in the same manner as example 5.
Respectively carrying out a-room temperature tensile test on the prepared high-strength high-toughness heat-resistant Al-RE-Y-Zr 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-Zr alloy is 245MPa, the yield strength is 150MPa, and the elongation is 8.2%; the tensile strength at high temperature of 250 ℃ is 124MPa, and the elongation is 15%.
Example 9
The high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting comprises the following components in percentage by weight: according to the theoretical mixture ratio, 11 wt% of La, 1 wt% of Y, 0.3 wt% of Mg, 0.5 wt% of Zr, and the balance of Al element and inevitable impurity elements.
This example was prepared in the same manner as example 5.
Respectively carrying out a-room temperature tensile test on the prepared high-strength high-toughness heat-resistant Al-RE-Y-Zr 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-Zr alloy is 242MPa, the yield strength is 140MPa, and the elongation is 9%; the tensile strength at high temperature of 250 ℃ is 125MPa, and the elongation is 12%.
Comparative example 1
The high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting comprises the following components in percentage by weight: according to the theoretical mixture ratio, 11 wt% of La, 0.3 wt% of Mg, 0.3 wt% of Zr, and the balance of Al element and inevitable impurity elements.
This comparative example was prepared in the same manner as in example 5.
Respectively carrying out a-room temperature tensile test on the prepared high-strength high-toughness heat-resistant Al-RE-Y-Zr alloy; b, carrying out high-temperature tensile property test at 250 ℃ after 200-hour heat exposure treatment at 250 ℃. In the comparative example, the room-temperature tensile strength of the high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy is 230MPa, the yield strength is 143MPa, and the elongation is 8 percent; the tensile strength at high temperature of 250 ℃ is 120MPa, and the elongation is 15%.
Comparative example 2
The high-strength and high-toughness heat-resistant Al-RE-Yb-Zr alloy suitable for pressure casting comprises the following components in percentage by weight: according to the theoretical mixture ratio, 11 wt% of La, 1 wt% of Yb, 0.3 wt% of Mg, 0.3 wt% of Zr, and the balance of Al element and inevitable impurity elements.
This comparative example was prepared in the same manner as in example 5.
Respectively carrying out a-room temperature tensile test on the prepared high-strength high-toughness heat-resistant Al-RE-Yb-Zr alloy; b, carrying out high-temperature tensile property test at 250 ℃ after 200-hour heat exposure treatment at 250 ℃. The room-temperature tensile strength of the high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy in the comparative example is 224MPa, the yield strength is 143MPa, and the elongation is 7.6 percent; the tensile strength at high temperature of 250 ℃ is 120MPa, and the elongation is 14.6%.
Comparative example 3
The high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting comprises the following components in percentage by weight: according to the theoretical mixture ratio, 11 wt% of La, 1 wt% of Y, 0.6 wt% of Mg, 0.3 wt% of Zr, and the balance of Al element and inevitable impurity elements.
This comparative example was prepared in the same manner as in example 5.
Respectively carrying out a-room temperature tensile test on the prepared high-strength high-toughness heat-resistant Al-RE-Y-Zr alloy; b, carrying out high-temperature tensile property test at 250 ℃ after 200-hour heat exposure treatment at 250 ℃. The room-temperature tensile strength of the high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy in the comparative example is 231MPa, the yield strength is 158MPa, and the elongation is 6.5%; the tensile strength at high temperature of 250 ℃ is 126MPa, and the elongation is 14%.
Comparative example 4
The high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting comprises the following components in percentage by weight: according to the theoretical mixture ratio, 11 wt% of Ce, 6 wt% of Y, 0.3 wt% of Mg, 0.01 wt% of Zr, and the balance of Al element and inevitable impurity elements.
This comparative example was prepared in the same manner as in example 1.
Respectively carrying out a-room temperature tensile test on the prepared high-strength high-toughness heat-resistant Al-RE-Y-Zr alloy; b, carrying out high-temperature tensile property test at 250 ℃ after 200-hour heat exposure treatment at 250 ℃. The room-temperature tensile strength of the high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy in the comparative example is 262MPa, the yield strength is 180MPa, and the elongation is 6 percent; the tensile strength at high temperature of 250 ℃ is 148MPa, and the elongation is 14%.
Comparative example 5
The high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting comprises the following components in percentage by weight: 3 wt% of La, 0.2 wt% of Y, 0.08 wt% of Zr, and the balance of Al element and inevitable impurity elements according to the theoretical mixture ratio.
This comparative example was prepared in the same manner as in example 2.
Respectively carrying out a-room temperature tensile test on the prepared high-strength high-toughness heat-resistant Al-RE-Y-Zr alloy; b, carrying out high-temperature tensile property test at 250 ℃ after 200-hour heat exposure treatment at 250 ℃. In the comparative example, the room-temperature tensile strength of the high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy is 225MPa, the yield strength is 126MPa, and the elongation is 19.6 percent; the tensile strength at high temperature of 250 ℃ is 88MPa, and the elongation is 25%.
The invention has many applications, and the above description is only a preferred embodiment of the invention. It should be noted that the above examples are only for illustrating the present invention, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications can be made without departing from the principles of the invention and these modifications are to be considered within the scope of the invention.
Claims (8)
1. A high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting is characterized in that: the material consists of the following elements in percentage by mass: 3-11% of RE, 0.1-5% of Y, 0.1-0.4% of Mg, 0.01-0.5% of Zr, and the balance of Al element and inevitable impurity elements; the RE component is one or two of La and Ce.
2. The high toughness, heat resistant Al-RE-Y-Zr alloy suitable for pressure casting according to claim 1, wherein: the material consists of the following elements in percentage by weight: 8 to 11% of RE, 1.0 to 3% of Y, 0.1 to 0.4% of Mg, and 0.01 to 0.3% of Zr.
3. The method for preparing the high-strength high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting according to claim 1, wherein the method comprises the following steps: the 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-Zr alloy components and the stoichiometric ratio; removing oxide layers of industrial pure aluminum ingots, industrial pure magnesium ingots, Al-RE, Al-Y and Al-Zr intermediate alloys, and drying and preheating to 220 ℃ of 180 ℃;
(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 of the industrial pure aluminum ingot;
(3) after the industrial pure aluminum ingot is completely melted, heating to 750 ℃, adding Al-RE, Al-Y and Al-Zr intermediate alloys for 2-4 times, keeping the temperature constant at 750 ℃, and stirring until the industrial pure aluminum ingot is completely melted;
(4) after the alloy is completely melted, cooling to 700-710 ℃, adding an industrial pure magnesium ingot into the melt, keeping the temperature constant at 700-710 ℃, stirring until the alloy is completely melted, and keeping the temperature for 30 minutes;
(5) adding a refining agent for refining 40-60 minutes before pressure casting when the alloy is completely melted, heating the furnace temperature to 750 ℃, preserving the temperature, standing for 10-20 minutes to promote the settlement of impurities and obtain an aluminum alloy melt; the refining agent is MgCl-free2The refining agent of (4);
(6) and cooling the aluminum alloy melt to 720-740 ℃, skimming surface scum, pressing the melt into a die preheated to 180-250 ℃ through a die casting machine, and thus obtaining the high-strength high-toughness heat-resistant die-casting Al-RE-Y-Zr alloy.
4. The method for preparing the high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting according to claim 3, wherein the method comprises the following steps: in the step (1), the Al-RE intermediate alloy is Al-20Ce, Al-20La or aluminum mixed rare earth intermediate alloy; the Al-Y intermediate alloy is Al-10Y, and the Al-Zr intermediate alloy is Al-5 Zr.
5. The method for preparing the high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting according to claim 3, wherein the method comprises the following steps: in the step (5), the refining agent comprises the following components in percentage by mass: 55% KCl, 30% NaCl, 15% BaCl2。
6. The method for preparing the high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting according to claim 3, wherein the method comprises the following steps: in the step (5), the addition amount of the refining agent is 1.0-2.5% of the total weight of the alloy raw materials.
7. The method for preparing the high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting according to claim 3, wherein the method comprises the following steps: in the step (5), the refining temperature is 720-750 ℃, and the stirring time of the refining treatment is 10-15 min.
8. The method for preparing the high-strength and high-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting according to claim 3, wherein the method comprises the following steps: in the step (6), the die casting speed is 1-8 m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010356884.XA CN111411268B (en) | 2020-04-29 | 2020-04-29 | High-strength-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010356884.XA CN111411268B (en) | 2020-04-29 | 2020-04-29 | High-strength-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111411268A CN111411268A (en) | 2020-07-14 |
| CN111411268B true CN111411268B (en) | 2022-03-01 |
Family
ID=71490321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010356884.XA Active CN111411268B (en) | 2020-04-29 | 2020-04-29 | High-strength-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111411268B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113151713A (en) * | 2021-04-23 | 2021-07-23 | 东北大学 | Al-Zr-B intermediate alloy and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108220693A (en) * | 2017-12-28 | 2018-06-29 | 上海交通大学 | A kind of Heat-resistant aluminum alloy of big content of rare earth 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 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0874012A (en) * | 1994-09-08 | 1996-03-19 | Toyota Motor Corp | Production of superplastic aluminum alloy |
| CN1584087A (en) * | 2004-06-15 | 2005-02-23 | 重庆大学 | High-perforance compression casting aluminium alloy |
| CN109868402B (en) * | 2019-03-29 | 2021-08-17 | 上海交通大学 | High-strength-toughness heat-resistant die-casting Mg-Y alloy and preparation method thereof |
-
2020
- 2020-04-29 CN CN202010356884.XA patent/CN111411268B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108220693A (en) * | 2017-12-28 | 2018-06-29 | 上海交通大学 | A kind of Heat-resistant aluminum alloy of big content of rare earth 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 |
Non-Patent Citations (1)
| Title |
|---|
| Effect of rare earth Y and Al-Ti-B master alloy on the microstructure and mechanical properties of 6063 aluminum alloy;Wanwu Ding et.al;《Journal of Alloys and Compounds》;20200307;1-11 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111411268A (en) | 2020-07-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| 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 | |
| CN109881062B (en) | High-strength, high-toughness and high-modulus extrusion casting magnesium alloy and preparation method thereof | |
| CN111378875B (en) | High-thermal-conductivity corrosion-resistant Al-RE-Y-Zr alloy suitable for gravity casting and preparation method thereof | |
| CA2770531A1 (en) | Multi-element heat-resistant aluminum alloy material with high strength and preparation method thereof | |
| CN110079711B (en) | Heat-resistant high-pressure cast Al-Si-Ni-Cu aluminum alloy and preparation method thereof | |
| CN108559875B (en) | High-strength heat-resistant aluminum alloy material for engine piston and preparation method thereof | |
| CN109807302B (en) | High-strength high-toughness heat-resistant die-casting Mg-Gd alloy and preparation method thereof | |
| CN105779838B (en) | High-thermal-conductivity die-casting magnesium alloy and preparation process thereof | |
| CN110129629B (en) | Heat-resistant cast Al-Si-Ni-Cu aluminum alloy and gravity casting preparation | |
| CN111411268B (en) | High-strength-toughness heat-resistant Al-RE-Y-Zr alloy suitable for pressure casting and preparation method thereof | |
| CN113699418B (en) | High-elasticity modulus and high-plasticity aluminum-silicon casting alloy and preparation method and application thereof | |
| CN111321326B (en) | Al-RE-Y-Mg alloy and preparation method thereof | |
| CN107937764B (en) | Liquid die forging high-strength and high-toughness aluminum alloy and liquid die forging method thereof | |
| CN111101031B (en) | Al-Mg2Si-Mg-Mn-Y-B high-strength and high-toughness aluminum alloy and preparation method thereof | |
| CN112921209A (en) | Ultrahigh-heat-conductivity high-plasticity medium-strength aluminum alloy and preparation method thereof | |
| CN117026023A (en) | Heat-treatment-free high-strength high-toughness die-casting aluminum alloy and preparation method thereof | |
| CN114182141A (en) | Novel high-strength and high-toughness heat-resistant aluminum-silicon casting alloy | |
| CN109930045B (en) | High-strength-toughness heat-resistant Mg-Gd alloy suitable for gravity casting and preparation method thereof | |
| CN109852859B (en) | High-strength-toughness heat-resistant Mg-Y-Er alloy suitable for gravity casting and preparation method thereof | |
| CN105112743A (en) | High-toughness cast-forged aluminum alloy and preparation method thereof | |
| CN100999799A (en) | Magnesium alloy | |
| CN109868402B (en) | High-strength-toughness heat-resistant die-casting Mg-Y alloy and preparation method thereof | |
| CN111485139B (en) | Al-RE-Y alloy and preparation method thereof | |
| CN112609109A (en) | Ce-Mg-containing high-strength heat-resistant aluminum 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 |