CN112045183A - Method for preparing ODS (oxide dispersion strengthened) reinforced heat-resistant aluminum alloy by adopting laser cladding forming - Google Patents
Method for preparing ODS (oxide dispersion strengthened) reinforced heat-resistant aluminum alloy by adopting laser cladding forming Download PDFInfo
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- C22C32/001—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 only oxides
- C22C32/0015—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 only oxides with only single oxides as main non-metallic constituents
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Abstract
The invention belongs to the field of advanced metal material preparation research, and particularly provides a method for preparing oxide dispersion strengthened heat-resistant aluminum alloy by laser cladding forming, which specifically comprises the following steps: preparing precursor powder: firstly, the rotary electrode atomized aluminum alloy powder is dipped into the solution for a period of time, then the nano oxide is selected and added into the solution, stirred and dried. Preparing nano oxide coated aluminum alloy powder: and (3) putting the precursor powder into a high-speed stirring heating furnace for stirring, decomposing and removing organic matters, scattering powder raw material agglomeration, and infiltrating the nano oxide into the surface layer of the alloy powder particles to finally obtain the nano oxide coated aluminum alloy powder. And carrying out laser cladding forming on the aluminum alloy powder coated with the nano oxide to finally obtain the aluminum alloy with the superfine oxide dispersed phase. The invention provides a new idea for preparing the ODS reinforced heat-resistant aluminum alloy, and has the advantages of short production period, low cost, convenient operation and the like.
Description
Technical Field
The invention belongs to the field of advanced metal material preparation research, and particularly provides a method for preparing oxide dispersion strengthened heat-resistant aluminum alloy through laser cladding forming.
Background
The rapid development of the modern aerospace industry puts higher requirements on the strength and heat resistance of the aluminum alloy. However, the traditional aluminum alloy material is difficult to meet the harsh requirements of high temperature resistance, high specific strength and the like of some components, so that the development of the heat-resistant aluminum alloy meeting the high-temperature service condition and the preparation technology thereof has good development prospect. The novel Al-Cu-Mg-Ag heat-resistant aluminum alloy is developed on the basis of the traditional heat-resistant aluminum alloy, and is expected to meet the requirements of the new generation of aerospace vehicles on the contrast strength, heat resistance and economy. After the alloy is added with a trace amount of Ag element, the aging precipitation behavior of the alloy can be improved, and Al can be promoted2Cu phase and a new phase (omega phase) are dispersed and separated out, so that the alloy has excellent thermal stability. Research shows that the Al-Cu-Mg-Ag alloy can be used for a long time at the temperature of 200-250 ℃. However, as the heat exposure temperature is increased, the precipitated phase in the alloy can be obviously coarsened, so that the strength of the alloy is rapidly reduced, and the alloy is further limitedGold is used at higher temperatures.
The nanometer Oxide is introduced into an aluminum alloy matrix to prepare Oxide Dispersion Strengthened (ODS) aluminum alloy, and the problem can be effectively solved. Firstly, the high-strength nano oxide can play a role in hindering dislocation movement in the matrix, and the dislocation movement is hindered, namely the material is strengthened. And the melting point of the nano oxide is higher, and compared with other precipitated phases, the nano oxide can not be dissolved even at a very high use temperature, so that the high-temperature strength of the heat-resistant aluminum alloy is effectively improved. Secondly, the introduction of a finely sized dispersoid phase into the matrix can significantly refine the matrix grains. And thirdly, the fine dispersed oxide particles can effectively inhibit the recrystallization of the alloy and prevent secondary recrystallization. In summary, dispersion strengthening of the heat-resistant aluminum alloy by using the nano oxide is an effective method for improving the high-temperature strength.
It is noted that ODS heat-resistant aluminum alloy has high room temperature strength as well as high temperature strength. Therefore, it is difficult to prepare heat-resistant parts with complex shapes by the conventional processing method, which severely restricts the popularization and application of ODS heat-resistant aluminum alloy. The 3D printing technology is taken as a representative technology of powder near-net shaping and is suitable for shaping parts with moderate size and complex shapes. The laser cladding forming technology in the 3D printing technology has attracted extensive attention due to a series of advantages of low cost, high product density, high precision, less cutting and even no cutting. In order to ensure the integrity of a complex fine structure in the near-net forming process, spherical fine-grained powder is generally required for the powder for laser cladding forming, and the requirement on the purity of the powder is high. However, when the ODS heat-resistant aluminum alloy is prepared by mechanical alloying, Al, Mg and other elements are easily oxidized in the mechanical alloying process. Meanwhile, in the high-energy ball milling process, the powder, the ball milling medium and the ball milling tank can collide at a high speed, and long-time ball milling causes the elements in the ball milling medium and the ball milling tank to enter target powder to cause pollution, so that the material performance is influenced. In addition, the powder obtained by mechanical alloying is seriously hardened, most of the powder is irregular in shape, the powder has poor flowability, and only some special methods such as sheath hot extrusion, sheath hot isostatic pressing or discharge plasma sintering forming can be used, so that the requirement of a laser cladding forming technology on the powder cannot be met. Therefore, it is necessary to develop a new technique for preparing ODS heat-resistant aluminum alloy.
During laser cladding of shaped metal materials, the area of laser action will form a molten pool in which the liquid metal is not stationary but is in vigorous motion with a series of physicochemical reactions. Based on the characteristic of laser cladding forming, the inventor proposes that the rotary electrode atomized powder with fine particle size is used as a heat-resistant aluminum alloy matrix powder raw material, and then nanometer oxide coated heat-resistant aluminum alloy powder is prepared and subjected to laser cladding forming. In the process of laser cladding forming, melting bath area metal is melted into liquid state, and nanometer oxide coated on the surface of powder is brought into the powder through violent movement in the melting bath and is dispersed and distributed, and finally the ODS heat-resistant aluminum alloy product with a complex shape is obtained.
Disclosure of Invention
The invention aims to provide a method for preparing an ODS (oxide dispersion strengthened) heat-resistant aluminum alloy, and aims to develop an efficient method for preparing a heat-resistant aluminum alloy with an ultrafine oxide dispersed phase. The ODS heat-resistant aluminum alloy has strong designability and extremely fine and uniform oxide dispersed phase.
The preparation method comprises the steps of firstly preparing a powder precursor by adopting rotary electrode atomized powder of a target alloy and a corresponding nano oxide, then obtaining superfine oxide dispersion phase coated heat-resistant aluminum alloy powder in a special stirring heating furnace by the powder precursor, and finally obtaining the ODS reinforced heat-resistant aluminum alloy with a complex shape by carrying out laser cladding forming on the nano oxide coated heat-resistant aluminum alloy powder.
Therefore, the invention provides a method for preparing an ODS reinforced heat-resistant aluminum alloy, which comprises the following steps of: firstly, the concentration is adjusted to be 4-10 g.L-1Adding the poly diallyl dimethyl ammonium chloride solution or the cysteine solution into the solution to dip for 10-30 minutes, and then selecting nano Y2O3Or La2O3One of the powders is a nano oxide source, the nano oxide source is added into the solution and stirred for 0.5-6 hours, and then the solution is dried, wherein the nano oxide and the atomized powder are used in such amounts that the nano oxide in the finally prepared powder accounts for 0.01-5 wt.% of the ODS aluminum alloy. b. Preparing the nano oxide coated aluminum alloy powder: and (b) putting the precursor powder obtained in the step (a) into a high-speed stirring heating furnace, stirring at a certain temperature under the condition of atmosphere protection, decomposing and removing organic matters remained in the precursor in the high-speed stirring process, scattering the powder raw materials, and infiltrating the nano oxide into the surface layer of the atomized alloy powder particles of the rotary electrode to finally obtain the nano oxide-coated heat-resistant aluminum alloy powder. c. Carrying out laser cladding on the heat-resistant aluminum alloy powder coated with the nano oxide to form an ODS aluminum alloy: and c, carrying out laser cladding forming on the aluminum alloy powder coated with the nano oxide obtained in the step b, controlling the process in the laser cladding forming process to enable the metal powder to be melted by laser to form a molten pool, and carrying the nano oxide into the molten pool by the flowing of liquefied metal in the molten pool and uniformly dispersing and distributing the nano oxide to finally obtain the heat-resistant aluminum alloy with the superfine oxide dispersed phase.
In a specific embodiment, in step a, the solution for preparing the precursor powder is poly (diallyldimethylammonium chloride) solution or cysteine solution with a concentration of 4-10 g.L-1Preferably 6 to 8 g.L-1。
In a specific embodiment, in step a, the rotary electrode atomized aluminum alloy composition is Al- (3-7.5) wt.% Cu- (0.3-2) wt.% Mg- (0.3-1.3) wt.% Ag- (0.2-0.65) wt.% Mn- (0.02-0.1) wt.% Ti- (0.05-5) wt.% Zr, preferably: al- (4.5-6.5) wt.% Cu- (0.5-1.2) wt.% Mg- (0.5-0.8) wt.% Ag- (0.3-0.5) wt.% Mn- (0.03-0.06) wt.% Ti- (0.1-0.3) wt.% Zr.
In a specific embodiment, in step a, the time for stirring after the powder raw material is added to the solution is 0.5 to 6 hours, preferably 0.5 to 2 hours.
In a specific embodiment, in step a, the source of nano-oxide is nano-Y2O3Or La2O3One of the powdersThe final mass percentage of the nano-oxide in the ODS aluminum alloy powder is 0.01-5 wt.%, preferably 0.1-2 wt.%.
In a specific embodiment, the protective atmosphere in step b is one of vacuum, argon and nitrogen, and preferably the protective atmosphere is vacuum and argon.
In a particular embodiment, the incubation temperature in step b is from 50 ℃ to 300 ℃, preferably from 70 ℃ to 150 ℃.
In a specific embodiment, the rotation speed of the stirring propeller in step b is 15000-.
In a particular embodiment, the stirring time in step b is from 0.5 to 4 hours, preferably from 0.5 to 2 hours.
In a specific embodiment, the laser scanning speed in step c is 500-.
In a specific embodiment, the laser scanning pitch in step c is 0.02 to 0.075mm, preferably 0.03 to 0.05 mm.
In a particular embodiment, the thickness of the dusting in step c is from 0.03 to 0.075mm, preferably from 0.04 to 0.06 mm.
The invention has the advantages that:
1. the ODS strengthened heat-resistant aluminum alloy obtained by the method has high density, and the nano-oxide dispersed phase has fine particle size and is uniformly dispersed in a matrix.
2. The alloy prepared by the invention has strong designability of components, and can be used for preparing products with complex shapes under the condition of little processing or no processing.
3. The method has simple process and low cost, and is a method for efficiently preparing the ODS reinforced heat-resistant aluminum alloy.
Drawings
FIG. 1 is a process flow chart of a method for preparing an oxide dispersion strengthened heat-resistant aluminum alloy by laser cladding forming.
Detailed Description
The technical solution of the present invention is further described with reference to the following specific embodiments.
As shown in FIG. 1, the invention relates to a method for preparing oxide dispersion strengthened heat-resistant aluminum alloy by laser cladding forming, which comprises the following steps,
s1) adding the atomized aluminum alloy powder of the rotary electrode into the solution for dipping, then adding the nano oxide source, stirring and drying to obtain precursor powder,
s2) putting the precursor powder obtained in the step S1) under the condition of atmosphere protection, heating, keeping the temperature until the set temperature is reached, simultaneously stirring at a high speed, decomposing and removing organic matters remained in the precursor in the process of high-speed stirring, scattering the agglomeration of powder raw materials, and infiltrating the nano oxide into the surface layer of the atomized alloy powder particles of the rotary electrode to finally obtain the nano oxide-coated aluminum alloy powder;
s3) carrying out laser cladding forming on the aluminum alloy powder coated with the nano oxides obtained in the step S2), controlling the process in the laser cladding forming process to enable the metal powder to be melted by laser to form a molten pool, and carrying the nano oxides into the molten pool by the flowing of liquefied metal in the molten pool and uniformly dispersing and distributing the nano oxides, so as to finally obtain the aluminum alloy with the superfine oxide dispersed phase.
The specific steps of S1) are as follows:
s1.1) firstly preparing the concentration of 4-10 g.L-1Adding atomized aluminum alloy powder of a rotary electrode into the precursor solution, and soaking for 10-30 minutes to obtain a suspension solution;
s1.2) stirring the nano oxide source suspension solution for 0.5-6 hours, and then drying the solution to obtain precursor powder;
wherein the nano oxide and the rotary electrode atomized aluminum alloy powder are used in an amount such that the aluminum alloy with the superfine oxide dispersed phase in the finally prepared alloy has a mass percentage of 0.01-5 wt.%.
The precursor solution is a poly diallyl dimethyl ammonium chloride solution or a cysteine solution;
the nano oxide source is nano Y2O3Or La2O3One of the powders;
the rotary electrode atomized aluminum alloy comprises the following components: 3-7.5 wt.% Cu, 0.3-2 wt.% Mg, 0.3-1.3 wt.% Ag, 0.2-0.65 wt.% Mn, 0.02-0.1 wt.% Ti, 0.05-5 wt.% Zr, the balance Al.
The S2) comprises the following specific steps:
s2.1) heating the obtained precursor powder in a vacuum environment to 50-300 ℃, preserving heat,
s2.2) stirring for 0.5-4 hours by adopting a stirring propeller at the rotating speed of 15000-40000 r/min to obtain the aluminum alloy powder coated by the nano oxide.
The S3) comprises the following specific steps:
s3.1) carrying out laser cladding forming on the obtained aluminum alloy powder coated with the nano oxide, wherein the powder spreading thickness is 0.04-0.06 mm;
s3.2) laser scanning is adopted, the scanning speed is 500-4000mm/S, the scanning distance is 0.02-0.075mm, the flow of the liquefied metal in the molten pool brings the nano oxide into the molten pool and the nano oxide is uniformly dispersed and distributed, and finally the aluminum alloy with the superfine oxide dispersed phase is obtained.
The concentration of the precursor solution can also be 6-8 g.L-1。
The components of the rotary electrode atomized aluminum alloy powder can also be as follows: 4.5-6.5 wt.% Cu, 0.5-1. wt.% Mg, 0.5-0.8 wt.% Ag, 0.3-0.5 wt.% Mn, 0.03-0.06 wt.% Ti, 0.1-0.3 wt.% Zr, the balance being Al.
The rare earth nano oxide is used in an amount which ensures that the nano oxide in the finally prepared alloy accounts for 0.1-2 wt.% of the aluminum alloy with the superfine oxide dispersed phase.
The heating temperature in the S2) can be 70-150 ℃;
the rotation speed can also be 20000-30000 r/min, and the stirring time can be 0.5-2 hours.
In the S3), the powder spreading thickness can also be 0.045-0.055 mm; the scanning speed is 1000-2000 mm/s; the scanning interval can also be 0.03-0.05 mm.
Example 1:
the components: al-6.7 wt.% Cu-0.8 wt.% Mg-0.7 wt.% Ag-0.4 wt.% Mn-0.06wt. -% ]
Ti-0.2wt.％Zr-0.5wt.％La2O3Preparing a heat-resistant aluminum alloy:
ingredients of Al-6.7 wt.% Cu-0.8 wt.% Mg-0.7 wt.% Ag-0.4 wt.% Mn-0.06 wt.%
Rotary electrode atomized powder of Ti-0.2 wt.% Zr and nano La2O3The powder is weighed for standby according to the mass ratio of 99.5: 0.5. Weight percent of Al-6.7 wt.% Cu-0.8 wt.% Mg-0.7 wt.% Ag-0.4 wt.% Mn-0.06wt. -%)
Atomized powder of Ti-0.2 wt.% Zr dissolved in 8 g.L-1Soaking the poly (diallyl dimethyl ammonium chloride) solution for 30 minutes, and then adding nano La2O3And adding the powder into the solution, stirring for 2 hours, and drying the solution to obtain a powder precursor. And stirring the powder precursor for 2 hours in an argon atmosphere at the temperature of 100 ℃ and the rotating speed of a stirring propeller of 25000 r/min to obtain the nano-oxide coated aluminum alloy powder. And finally, carrying out laser cladding forming on the aluminum alloy powder coated with the nano oxide, wherein forming parameters comprise the powder laying thickness of 0.04mm, the scanning speed of 1000mm/s and the scanning distance of 0.03mm, and obtaining the ODS aluminum alloy product with the target shape.
Example 2:
the composition Al-5.5 wt.% Cu-0.8 wt.% Mg-0.4 wt.% Ag-0.3 wt.% Mn-0.05 wt.% Ti
-0.15wt.％Zr-1wt.％La2O3Preparing a heat-resistant aluminum alloy:
ingredients are Al-5.5 wt.% Cu-0.8 wt.% Mg-0.4 wt.% Ag-0.3 wt.% Mn-0.05 wt.%
Rotary electrode atomized powder of Ti-0.15 wt.% Zr and nano La2O3The powder is weighed for standby according to the mass ratio of 99: 1. Weight percent Al-5.5 wt.% Cu-0.8 wt.% Mg-0.4 wt.% Ag-0.3 wt.% Mn-0.05 wt.%
Ti-0.15 wt.% Zr in 6 g.L-1Soaking the solution of poly (diallyldimethylammonium chloride) for 20 minutes, and then adding nano La2O3Adding the powder into the solution, stirring for 1.5 hours, and drying the solution to obtain a powder precursor. Placing the powder precursor in argon atmosphere at 90 deg.C and stirring propeller speed of 20000 rpmStirring for 2 hours under the condition of the aluminum alloy powder, and obtaining the aluminum alloy powder coated with the nano oxide. And finally, carrying out laser cladding forming on the aluminum alloy powder coated with the nano oxide, wherein forming parameters comprise the powder laying thickness of 0.05mm, the scanning speed of 1200mm/s and the scanning distance of 0.04mm, and obtaining the ODS aluminum alloy product with the target shape.
Example 3:
the component Al-5 wt.% Cu-0.6 wt.% Mg-0.3 wt.% Ag-0.25 wt.% Mn-0.04 wt.% Ti-
0.05wt.％Zr-0.6wt.％Y2O3Preparing a heat-resistant aluminum alloy:
the components are Al-5 wt.% Cu-0.6 wt.% Mg-0.3 wt.% Ag-0.25 wt.% Mn-0.04 wt.% Ti
-0.05 wt.% Zr rotary electrode atomized powder and nano-Y2O3The powder is weighed for standby according to the mass ratio of 99.4: 0.6. Dividing the weighed Al-5 wt.% Cu-0.6 wt.% Mg-0.3 wt.% Ag-0.25 wt.% Mn-0.04 wt.%
Atomized powder of Ti-0.05 wt.% Zr dissolved in 4 g.L-1Is soaked for 15 minutes, and then the nano Y is put into2O3Adding the powder into the solution, stirring for 1 hour, and drying the solution to obtain a powder precursor. And stirring the powder precursor for 2 hours in an argon atmosphere at the temperature of 110 ℃ and the rotating speed of a stirring propeller of 20000 revolutions per minute to obtain the nano-oxide coated aluminum alloy powder. And finally, carrying out laser cladding forming on the aluminum alloy powder coated with the nano oxide, wherein forming parameters comprise the powder laying thickness of 0.06mm, the scanning speed of 1000mm/s and the scanning distance of 0.03mm, and obtaining the ODS aluminum alloy product with the target shape.
Example 4:
the composition Al-4.5 wt.% Cu-0.5 wt.% Mg-0.5 wt.% Ag-0.2 wt.% Mn-0.03 wt.% Ti-
0.1wt.％Zr-0.8wt.％Y2O3Preparing a heat-resistant aluminum alloy:
the components are Al-4.5 wt.% Cu-0.5 wt.% Mg-0.5 wt.% Ag-0.2 wt.% Mn-0.03 wt.% Ti
-0.1 wt.% Zr rotary electrode atomized powder and nano-Y2O3The powder is weighed for standby according to the mass ratio of 99.2: 0.8. Weighing Al, 4.5 wt.% Cu, 0.5 wt.% Mg and 0.5 wt.% Mg.％Ag-0.2wt.％Mn-0.03wt.％Ti
Atomized powder of-0.1 wt.% Zr dissolved in 4 g.L-1Is soaked for 15 minutes, and then the nano Y is put into2O3Adding the powder into the solution, stirring for 1 hour, and drying the solution to obtain a powder precursor. And stirring the powder precursor for 1 hour in an argon atmosphere at the temperature of 90 ℃ and the rotating speed of a stirring propeller of 30000 r/min to obtain the nano-oxide coated aluminum alloy powder. And finally, carrying out laser cladding forming on the aluminum alloy powder coated with the nano oxide, wherein forming parameters comprise the powder laying thickness of 0.04mm, the scanning speed of 1500mm/s and the scanning distance of 0.04mm, and obtaining the ODS aluminum alloy product with the target shape.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions and substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A method for preparing an oxide dispersion strengthened heat-resistant aluminum alloy by laser cladding forming is characterized by comprising the following steps:
s1) adding the rotary electrode atomized aluminum alloy into the precursor solution for dipping, adding the nano oxide source, stirring and drying to obtain precursor powder,
s2) putting the precursor powder obtained in the step S1) into a protective atmosphere, heating, keeping the temperature after heating to a set temperature, and stirring at a high speed to obtain the aluminum alloy powder coated by the nano oxide;
s3) carrying out laser cladding forming on the aluminum alloy powder coated with the nano oxides obtained in the step S2), controlling the process in the laser cladding forming process to enable the metal powder to be melted by laser to form a molten pool, and carrying the nano oxides into the molten pool by the flowing of liquefied metal in the molten pool and uniformly dispersing and distributing the nano oxides, so as to finally obtain the aluminum alloy with the superfine oxide dispersed phase.
2. The method as claimed in claim 1, wherein the specific steps of S1) are:
s1.1) firstly preparing the concentration of 4-10 g.L-1Adding atomized aluminum alloy powder of a rotary electrode into the precursor solution, and soaking for 10-30 minutes to obtain a suspension solution;
s1.2) stirring the nano oxide source suspension solution for 0.5-6 hours, and then drying the solution to obtain precursor powder;
wherein the nano-oxide is used in an amount such that the aluminum alloy having a dispersed phase of ultra-fine oxide in the finally prepared alloy has a weight percentage of 0.01-5 wt.%.
3. The method according to claim 2, wherein the precursor solution is a poly diallyldimethylammonium chloride solution or a cysteine solution;
the nano oxide source is nano Y2O3Or La2O3One of the powders;
the rotary electrode atomized aluminum alloy comprises the following components: 3-7.5 wt.% Cu, 0.3-2 wt.% Mg, 0.3-1.3 wt.% Ag, 0.2-0.65 wt.% Mn, 0.02-0.1 wt.% Ti, 0.05-5 wt.% Zr, the balance Al.
4. The method as claimed in claim 3, wherein the specific steps of S2) are as follows:
s2.1) heating the obtained precursor powder in a vacuum environment to 50-300 ℃, preserving heat,
s2.2) stirring for 0.5-4 hours by adopting a stirring propeller at the rotating speed of 15000-40000 r/min to obtain the aluminum alloy powder coated by the nano oxide.
5. The method as claimed in claim 4, wherein the specific steps of S3) are as follows:
s3.1) carrying out laser cladding forming on the obtained aluminum alloy powder coated with the nano oxide, wherein the powder spreading thickness is 0.04-0.06 mm;
s3.2) laser scanning is adopted, the scanning speed is 500-4000mm/S, the scanning distance is 0.02-0.075mm, the flow of the liquefied metal in the molten pool brings the nano oxide into the molten pool and the nano oxide is uniformly dispersed and distributed, and finally the aluminum alloy with the superfine oxide dispersed phase is obtained.
6. The method according to claim 3, wherein the precursor solution has a concentration of 6-8 g-L-1。
7. The method according to claim 3, wherein the rotary electrode atomized aluminum alloy powder has a composition further comprising: 4.5-6.5 wt.% Cu, 0.5-1. wt.% Mg, 0.5-0.8 wt.% Ag, 0.3-0.5 wt.% Mn, 0.03-0.06 wt.% Ti, 0.1-0.3 wt.% Zr, the balance being Al.
8. A method according to claim 3, characterized in that the rare earth nano-oxide is used in such an amount that the nano-oxide in the finally prepared alloy is in the range of 0.1-2 wt.% in relation to the weight percentage of the aluminium alloy with dispersed phases of ultra-fine oxide.
9. The method as claimed in claim 4, wherein the heating temperature in S2) is 70-150 ℃;
the rotation speed can also be 20000-30000 r/min, and the stirring time can be 0.5-2 hours.
10. The method of claim 5, wherein in S3) the dusting thickness is also 0.045-0.055 mm; the scanning speed is 1000-2000 mm/s; the scanning interval can also be 0.03-0.05 mm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113458415A (en) * | 2021-09-03 | 2021-10-01 | 北京煜鼎增材制造研究院有限公司 | Laser additive manufacturing method of high-stability particle dispersion strengthened titanium alloy |
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| CN115156525A (en) * | 2022-06-22 | 2022-10-11 | 广东省科学院新材料研究所 | Active modification spherical magnesium alloy powder based on electrostatic self-assembly and preparation method and application thereof |
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| CN112045183B (en) | 2022-12-20 |
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