CN112725662A - High-strength heat-resistant cast aluminum alloy material and preparation method thereof - Google Patents
High-strength heat-resistant cast aluminum alloy material and preparation method thereof Download PDFInfo
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- 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
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- 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
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- 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
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
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- 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
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0068—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only nitrides
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/057—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
Abstract
The invention relates to the technical field of aluminum alloy materials and preparation methods thereof, in particular to a high-strength heat-resistant cast aluminum alloy material which comprises the following components in percentage by mass: 1-5% of copper, 0.2-1.2% of manganese, 0.12-0.2% of magnesium, 0.06-0.08% of hafnium, 3.4-5.8% of aluminum oxynitride and the balance of aluminum; smelting an aluminum ingot at high temperature, adding copper, manganese, magnesium and hafnium metals weighed according to the mass percentage, raising the temperature, adding aluminum oxynitride after all the metals are molten, and preparing a mixed solution; placing the mixed solution in an ultrasonic heating device for heat preservation; finally, casting the aluminum alloy into a mold subjected to preheating treatment, and cooling to obtain a cast aluminum alloy; according to the invention, aluminum oxynitride is added into aluminum, copper, manganese, magnesium and hafnium metal, so that the aluminum alloy material has the characteristics of high strength and good heat resistance, and meanwhile, ultrasonic waves are emitted by the ultrasonic heating device to fully mix all components, so that the casting performance of the aluminum alloy material is greatly improved, and the strength of the aluminum alloy material is further improved.
Description
Technical Field
The invention relates to the technical field of aluminum alloy materials and preparation methods thereof, in particular to a high-strength heat-resistant cast aluminum alloy material and a preparation method thereof.
Background
Aluminum alloys are the most widely used class of non-ferrous structural materials in industry and have found a number of applications in the aerospace, automotive, mechanical manufacturing, marine and chemical industries. The rapid development of industrial economy has increased the demand for welded structural members of aluminum alloys, so that the study on the weldability of aluminum alloys is also deep, and the aluminum alloys are the most used alloys at present. The aluminum alloy has low density, high strength similar to or superior to that of high-quality steel, good plasticity, excellent electric conductivity, heat conductivity and corrosion resistance, is widely used in industry, and is second to steel in use amount.
However, with the rapid development of the industries such as aviation and aerospace, the use temperature of cast aluminum alloy components is continuously increased, the requirement on the strength of materials is higher and higher, and the improvement of the strength and the heat resistance of cast aluminum alloys becomes urgent needs for meeting the requirement.
Chinese patent (publication No. CN108624788A) discloses a high-strength and high-toughness cast aluminum alloy and a preparation method thereof, the high-strength and high-toughness cast aluminum alloy is prepared from the following components of 8.5-12.0 parts by weight of silicon, 1.0-4.0 parts by weight of copper, 0.2-0.5 part by weight of magnesium, 0.55-0.7 part by weight of manganese, 0.05-0.1 part by weight of titanium, 0.001-0.003 part by weight of boron, 0.0-0.2 part by weight of rhenium, 0.0-0.25 part by weight of alterant, 0.0-0.5 part by weight of impurity element and the balance of aluminum, and the preparation method comprises the following steps: A. heating aluminum and silicon, alloying, and adjusting the content of Ca to 0.0-0.004 weight part and the alloying temperature to 750-; B. electrolyzing and preheating manganese to obtain electrolytic manganese, adding the electrolytic manganese and copper into the step A, and fully stirring and alloying; C. b, preparing modifier intermediate alloy and aluminum rare earth intermediate alloy from modifier and rhenium, adding the modifier intermediate alloy and the aluminum rare earth intermediate alloy into the step B, fully stirring and alloying, sampling, carrying out process component detection and adjusting, wherein the modifier is antimony or strontium; D. adopting sodium-free or low-sodium slag remover to spray powder for deslagging and refining, and skimming the slag, wherein the content of the slag remover is 0.5-3% of the weight of the melt; E. making titanium and boron into an intermediate alloy to obtain aluminum titanium and aluminum titanium boron, adding magnesium, aluminum titanium and aluminum titanium boron into the step D, fully stirring and alloying, sampling, detecting process components and adjusting; F. introducing 99.99 percent high-purity nitrogen or ammonia gas into the furnace for refining until the pinhole degree is 2 grade, standing, cleaning the scum on the surface, wherein the refining temperature in the furnace is 700-; G. carrying out aluminum alloy ingot casting in a furnace or transferring the aluminum alloy ingot into a casting machine heat preservation furnace to obtain an aluminum alloy ingot, remelting, degassing, deslagging and refining the aluminum alloy ingot, transferring the refined aluminum alloy ingot into the casting machine heat preservation furnace, and carrying out die casting to obtain a die casting piece, wherein the ingot casting temperature is 670-; H. demolding the die casting, and immediately cooling by water cooling or forced air cooling after demolding, wherein the demolding temperature is more than 350 ℃; J. carrying out aging heat treatment strengthening on the die casting to obtain cast aluminum alloy, wherein the aging temperature is 140 ℃ and 180 ℃, and the aging time is 1-8 hours; however, the cast aluminum alloy material is prepared through the steps of heating, electrolysis, stirring, heat preservation and the like, but the aluminum alloy material prepared by the method has insufficient strength and heat resistance, and cannot be used in the fields with high requirements on materials such as aerospace and the like.
Disclosure of Invention
The invention aims to provide a high-strength heat-resistant cast aluminum alloy material and a preparation method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a high-strength heat-resistant cast aluminum alloy material comprises the following components in percentage by mass: 1 to 5% of copper, 0.2 to 1.2% of manganese, 0.12 to 0.2% of magnesium, 0.06 to 0.08% of hafnium, 3.4 to 5.8% of aluminum oxynitride, and 87.72 to 95.22% of aluminum.
As a further scheme of the invention: the high-strength heat-resistant cast aluminum alloy material comprises the following components in percentage by mass: 2 to 4% of copper, 0.45 to 0.95% of manganese, 0.14 to 0.18% of magnesium, 0.065 to 0.075% of hafnium, 4 to 5.2% of aluminum oxynitride and 89.595 to 93.345% of aluminum.
As a still further scheme of the invention: the high-strength heat-resistant cast aluminum alloy material comprises the following components in percentage by mass: 3% of copper, 0.7% of manganese, 0.16% of magnesium, 0.07% of hafnium, 4.6% of aluminum oxynitride and 91.47%.
A preparation method of a high-strength heat-resistant cast aluminum alloy material comprises the following steps:
1) smelting an aluminum ingot, controlling the smelting temperature to be 700-800 ℃, adding copper, manganese, magnesium and hafnium metals weighed according to the mass percentage while smelting, raising the temperature, adding aluminum oxynitride after all the metals are molten, and preparing a mixed solution;
2) placing the mixed solution in an ultrasonic heating device, preserving heat, and simultaneously generating ultrasonic waves by the ultrasonic heating device;
3) casting the mixed solution into a mold subjected to preheating treatment, and naturally cooling in air to obtain a cast ingot;
4) carrying out hot extrusion or hot rolling on the ingot, wherein the extrusion or rolling temperature is 400-500 ℃, and reducing the cross section area of the round ingot or the rectangular ingot by at least 30% to obtain a blank;
5) annealing the blank at the temperature of 350-450 ℃ for 1 minute, then cooling, and cooling to room temperature within 0.5-1 hour;
6) drawing or cold rolling the blank to reduce its cross-sectional area by at least 10%;
7) annealing the blank at the temperature of 200-250 ℃ for 5-10 hours;
8) and (4) placing the blank in air to naturally cool to room temperature to obtain the cast aluminum alloy material.
As a still further scheme of the invention: in the step 2), the heat preservation temperature of the mixed solution is controlled to be 700-800 ℃.
As a still further scheme of the invention: in the step 2), the heat preservation time of the mixed solution is controlled to be 8-10 hours.
As a still further scheme of the invention: in the step 2), the frequency of ultrasonic waves generated by the ultrasonic heating device is 25000-30000 Hz.
As a still further scheme of the invention: in step 5), the cooling treatment is performed by water cooling or air cooling.
As a still further scheme of the invention: and step 6) and step 7) are repeated in sequence.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, aluminum oxynitride is added into aluminum, copper, manganese, magnesium and hafnium metal, so that the aluminum alloy material has the characteristics of high strength and good heat resistance, and meanwhile, ultrasonic waves are emitted by the ultrasonic heating device to fully mix all components, so that the casting performance of the aluminum alloy material is greatly improved, and the strength of the aluminum alloy material is further improved.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Example 1
In the embodiment of the invention, the high-strength heat-resistant cast aluminum alloy material comprises the following components in percentage by mass: 1% of copper, 0.2% of manganese, 0.12% of magnesium, 0.06% of hafnium, 3.4% of aluminum oxynitride and 95.22% of aluminum.
The preparation method of the high-strength heat-resistant cast aluminum alloy material comprises the following steps:
1) smelting an aluminum ingot, controlling the smelting temperature at 700 ℃, adding copper, manganese, magnesium and hafnium metals weighed according to the mass percentage while smelting, raising the temperature, adding aluminum oxynitride after all the metals are molten, and preparing a mixed solution;
2) placing the mixed solution in an ultrasonic heating device, and carrying out heat preservation, wherein the heat preservation temperature is controlled to be 700 ℃, the heat preservation time is controlled to be 8 hours, and meanwhile, the ultrasonic heating device generates ultrasonic waves with the frequency of 25000 Hz;
3) casting the mixed solution into a mold subjected to preheating treatment, and naturally cooling in air to obtain a cast ingot;
4) hot extruding or hot rolling the ingot, wherein the extruding or rolling temperature is 400 ℃, and the cross section area of the round ingot or the rectangular ingot is reduced by at least 30 percent to obtain a blank;
5) annealing the blank at 350 ℃ for 1 minute, then carrying out water cooling or air cooling treatment, and cooling to room temperature within 0.5 hour;
6) drawing or cold rolling the blank to reduce its cross-sectional area by at least 10%;
7) annealing the blank at a temperature in the range of 200 ℃ for 5 hours;
8) and (5) repeating the step 6) and the step 7), and then naturally cooling the blank in the air to room temperature to obtain the cast aluminum alloy material.
Example 2
In the embodiment of the invention, the high-strength heat-resistant cast aluminum alloy material comprises the following components in percentage by mass: 5% of copper, 1.2% of manganese, 0.2% of magnesium, 0.08% of hafnium, 5.8% of aluminum oxynitride and 87.72% of aluminum.
The preparation method of the high-strength heat-resistant cast aluminum alloy material comprises the following steps:
1) smelting an aluminum ingot, controlling the smelting temperature at 800 ℃, adding copper, manganese, magnesium and hafnium metals weighed according to the mass percentage while smelting, raising the temperature, adding aluminum oxynitride after all the metals are molten, and preparing a mixed solution;
2) placing the mixed solution in an ultrasonic heating device, and carrying out heat preservation, wherein the heat preservation temperature is controlled at 800 ℃, the heat preservation time is controlled at 10 hours, and meanwhile, the ultrasonic heating device generates ultrasonic waves with the frequency of 30000 Hz;
3) casting the mixed solution into a mold subjected to preheating treatment, and naturally cooling in air to obtain a cast ingot;
4) hot extruding or hot rolling the ingot, wherein the extruding or rolling temperature is 500 ℃, and the cross section area of the round ingot or the rectangular ingot is reduced by at least 30 percent to obtain a blank;
5) annealing the blank at the temperature of 450 ℃ for 1 minute, then carrying out water cooling or air cooling treatment, and cooling to room temperature within 1 hour;
6) drawing or cold rolling the blank to reduce its cross-sectional area by at least 10%;
7) annealing the blank at a temperature of 250 ℃ for 10 hours;
8) and (5) repeating the step 6) and the step 7), and then naturally cooling the blank in the air to room temperature to obtain the cast aluminum alloy material.
Example 3
In the embodiment of the invention, the high-strength heat-resistant cast aluminum alloy material comprises the following components in percentage by mass: 2% of copper, 0.45% of manganese, 0.14% of magnesium, 0.065% of hafnium, 4% of aluminum oxynitride and 93.345% of aluminum.
The preparation method of the high-strength heat-resistant cast aluminum alloy material comprises the following steps:
1) smelting an aluminum ingot, controlling the smelting temperature at 750 ℃, adding copper, manganese, magnesium and hafnium metals weighed according to the mass percentage while smelting, raising the temperature, adding aluminum oxynitride after all the metals are molten, and preparing a mixed solution;
2) placing the mixed solution in an ultrasonic heating device, and carrying out heat preservation, wherein the heat preservation temperature is controlled to be 750 ℃, the heat preservation time is controlled to be 9 hours, and meanwhile, the ultrasonic heating device generates ultrasonic waves with the frequency of 27500 Hz;
3) casting the mixed solution into a mold subjected to preheating treatment, and naturally cooling in air to obtain a cast ingot;
4) hot extruding or hot rolling the ingot, wherein the extruding or rolling temperature is 450 ℃, and the cross section area of the round ingot or the rectangular ingot is reduced by at least 30 percent to obtain a blank;
5) annealing the blank at the temperature of 400 ℃ for 1 minute, then carrying out water cooling or air cooling treatment, and cooling to the room temperature within 0.75 hour;
6) drawing or cold rolling the blank to reduce its cross-sectional area by at least 10%;
7) annealing the blank at a temperature in the range of 225 ℃ for 7.5 hours;
8) and (5) repeating the step 6) and the step 7), and then naturally cooling the blank in the air to room temperature to obtain the cast aluminum alloy material.
Example 4
In the embodiment of the invention, the high-strength heat-resistant cast aluminum alloy material comprises the following components in percentage by mass: 4% of copper, 0.95% of manganese, 0.18% of magnesium, 0.075% of hafnium, 5.2% of aluminum oxynitride and 89.595% of aluminum.
The procedure was as in example 3.
Example 5
In the embodiment of the invention, the high-strength heat-resistant cast aluminum alloy material comprises the following components in percentage by mass: 3% of copper, 0.7% of manganese, 0.16% of magnesium, 0.07% of hafnium, 4.6% of aluminum oxynitride and 91.47% of aluminum.
The procedure was as in example 3.
Comparative example 1
The formulation and preparation were identical to those of example 5 except that no aluminum oxynitride was present, the aluminum content was 96.07%.
Comparative example 2
The formulation and the rest of the preparation process were identical to those of example 5, except that the preparation process lacked the process of keeping the temperature in the ultrasonic heating device.
Performance testing
And (3) testing tensile strength: the tensile test was performed using a hydraulic universal material testing machine.
1) Selecting a proper force measuring dial before testing;
2) starting the hydraulic pump and checking whether the operation is normal. And rotating a hand wheel of the oil delivery valve to open the oil delivery valve, lifting the workbench by about 10mm, and then gradually closing the oil delivery valve. And adjusting the balance thallium under the conditions that the hydraulic pump continues to work and the workbench basically stops rising, so that the left side surface of the swing rod above the pendulum bob is superposed with the calibrated reticle. Lifting the pendulum bob to check whether the buffer valve is normal or not, and then rotating the toothed bar to enable the pointer to align to a zero point of the force measuring dial;
3) clamping one end of an aluminum alloy sample in an upper clamping head, adjusting the position of a lower jaw seat according to the length of the sample, and clamping the sample;
4) starting a hydraulic pump, rotating an oil delivery valve and applying force at a certain speed;
5) after the test is finished, the oil feeding valve is closed, the machine is stopped, the sample is taken down, and the hand wheel of the oil return valve is slowly rotated, so that oil in the hydraulic cylinder leaks back to the oil tank, and the workbench descends to the original position.
And (3) hardness testing: calculations were performed using the brinell hardness calculation method. A steel ball with a diameter D is pressed into the surface of a sample under a load P of a predetermined size, and is unloaded after a predetermined time, and the hardness value is calculated from the ratio of the load value (kilogram force, 1 kilogram force equals 9.80665 Newton) to the indentation area (square millimeter). The calculated formula for brinell hardness HB is:
wherein d is the diameter of the indentation.
Melting point test: the measurement was carried out using DSC thermogram. The power difference (e.g., in the form of heat) input to the sample and reference is measured as a function of temperature under programmed temperature. The curve recorded by the differential scanning calorimeter is called DSC curve, and the information such as melting point of the tested sample can be read on a computer by taking the rate of heat absorption or heat release of the sample, namely the heat flow rate dH/dt (unit milliJoule/second) as an ordinate and the temperature T or time T as an abscissa.
The alloy properties of the high-strength, heat-resistant cast aluminum alloy materials obtained in examples 1 to 5 and comparative examples 1 to 2 were measured, and the results are shown in Table 1:
TABLE 1
| Group of | Tensile strength (MPa) | Hardness (HB) | Melting Point (. degree.C.) |
| Example 1 | 298 | 117 | 530～565 |
| Example 2 | 305 | 118 | 560～570 |
| Example 3 | 319 | 125 | 600～620 |
| Example 4 | 330 | 129 | 620～635 |
| Example 5 | 352 | 135 | 660～685 |
| Comparative example 1 | 280 | 102 | 520～525 |
| Comparative example 2 | 273 | 104 | 545～560 |
The aluminum alloy material has the advantages that under the combined action of the components, particularly the existence of aluminum oxynitride, the aluminum alloy material has high tensile strength, high hardness and high melting point; in the preparation process, ultrasonic heating is adopted to improve the tensile strength, the hardness and the melting point of the material.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. A high-strength heat-resistant cast aluminum alloy material is characterized by comprising the following components in percentage by mass: 1 to 5% of copper, 0.2 to 1.2% of manganese, 0.12 to 0.2% of magnesium, 0.06 to 0.08% of hafnium, 3.4 to 5.8% of aluminum oxynitride, and 87.72 to 95.22% of aluminum.
2. The high-strength heat-resistant cast aluminum alloy material as recited in claim 1, which is composed of, in mass percent: 2 to 4% of copper, 0.45 to 0.95% of manganese, 0.14 to 0.18% of magnesium, 0.065 to 0.075% of hafnium, 4 to 5.2% of aluminum oxynitride and 89.595 to 93.345% of aluminum.
3. The high-strength heat-resistant cast aluminum alloy material as recited in claim 2, which is composed of, in mass percent: 3% of copper, 0.7% of manganese, 0.16% of magnesium, 0.07% of hafnium, 4.6% of aluminum oxynitride and 91.47% of aluminum.
4. A method for producing a high-strength, heat-resistant cast aluminum alloy material as recited in any one of claims 1 to 3, comprising the steps of:
1) smelting an aluminum ingot, controlling the smelting temperature to be 700-800 ℃, adding copper, manganese, magnesium and hafnium metals weighed according to the mass percentage while smelting, raising the temperature, adding aluminum oxynitride after all the metals are molten, and preparing a mixed solution;
2) placing the mixed solution in an ultrasonic heating device, preserving heat, and simultaneously generating ultrasonic waves by the ultrasonic heating device;
3) casting the mixed solution into a mold subjected to preheating treatment, and naturally cooling in air to obtain a cast ingot;
4) carrying out hot extrusion or hot rolling on the ingot, wherein the extrusion or rolling temperature is 400-500 ℃, and reducing the cross section area of the round ingot or the rectangular ingot by at least 30% to obtain a blank;
5) annealing the blank at the temperature of 350-450 ℃ for 1 minute, then cooling, and cooling to room temperature within 0.5-1 hour;
6) drawing or cold rolling the blank to reduce its cross-sectional area by at least 10%;
7) annealing the blank at the temperature of 200-250 ℃ for 5-10 hours;
8) and (4) placing the blank in air to naturally cool to room temperature to obtain the cast aluminum alloy material.
5. The preparation method of the high-strength heat-resistant cast aluminum alloy material as claimed in claim 4, wherein in the step 2), the temperature of the mixed solution is controlled to be 700-800 ℃.
6. The preparation method of the high-strength heat-resistant cast aluminum alloy material as claimed in claim 4, wherein in the step 2), the heat preservation time of the mixed solution is controlled to be 8-10 hours.
7. The preparation method of the high-strength heat-resistant cast aluminum alloy material as recited in claim 4, wherein in the step 2), the ultrasonic heating device generates ultrasonic waves with a frequency of 25000Hz to 30000 Hz.
8. The method for preparing a high-strength heat-resistant cast aluminum alloy material according to claim 4, wherein in the step 5), the cooling treatment is performed by water cooling or air cooling.
9. The method of claim 4, wherein step 6) and step 7) are repeated one after another.
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| CN108350529A (en) * | 2015-10-30 | 2018-07-31 | 住友电气工业株式会社 | Agglomerated material and its manufacturing method |
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| CN109554571A (en) * | 2018-12-27 | 2019-04-02 | 吉林大学 | A kind of preparation method of two-way vertical controlled rolling trace Ti C REINFORCED Al-Cu-Mg sheet alloy |
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