CN115747547A - Metallurgical method for improving alloy micro-morphology through nanoparticles, product and application thereof - Google Patents
Metallurgical method for improving alloy micro-morphology through nanoparticles, product and application thereof Download PDFInfo
- Publication number
- CN115747547A CN115747547A CN202211326964.6A CN202211326964A CN115747547A CN 115747547 A CN115747547 A CN 115747547A CN 202211326964 A CN202211326964 A CN 202211326964A CN 115747547 A CN115747547 A CN 115747547A
- Authority
- CN
- China
- Prior art keywords
- alloy
- nanoparticles
- metal
- nano
- based master
- 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.)
- Pending
Links
Images
Landscapes
- Powder Metallurgy (AREA)
Abstract
The invention relates to a metallurgy method for improving alloy micro-morphology through nanoparticles, a product and application thereof, belonging to the technical field of alloy preparation. The invention discloses a metallurgy method for improving alloy micro-morphology through nano particles, which comprises the steps of mixing the nano particles into pure metal powder through a powder metallurgy method to form a nano particle metal-based master alloy, and then continuously heating and melting the nano particle metal-based master alloy and the pure metal, and uniformly stirring the nano particle metal-based master alloy and the pure metal to cast a blank. Compared with the traditional process in which a chemical modifier is added and the solidification speed is controlled, the invention can control the as-cast microstructure of the alloy by regulating and controlling the content of the nanoparticles in the nanoparticle metal-based master alloy and the content of the nanoparticle metal-based master alloy in the casting blank alloy so as to improve the material performance, and has the advantages of simpler process operation, low cost and suitability for large-scale and industrial production.
Description
Technical Field
The invention belongs to the technical field of alloy preparation, and relates to a metallurgy method for improving alloy micro-morphology through nanoparticles, and a product and application thereof.
Background
There is a strong correlation between the properties of the material and the microstructure, and conventional methods for controlling the as-cast microstructure include the addition of chemical modifiers and the control of the solidification rate. However, on the one hand, the modification method by chemical modifiers can only be effective for specific alloy systems; on the other hand, the high cost caused by controlling the solidification rate and the limited productivity in the prior art prevent the application of the method for controlling the as-cast microstructure by controlling the solidification rate to the mass production of engineering materials. Therefore, the alloy obtained by the traditional process has limited capability of controlling as-cast micro-morphology, and a new metallurgical control process is urgently needed to regulate and control the morphology, so that the structure performance of the alloy is improved.
Therefore, the alloy as-cast microstructure is controlled by a new metallurgical process method so as to achieve the purpose of improving the material performance, and the method is very necessary for widening the application range of the material performance and realizing large-scale production.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a metallurgical method for improving the microstructure of an alloy by nanoparticles; the invention also aims to provide a product prepared by the metallurgy method for improving the alloy micro-morphology through the nano particles.
In order to achieve the purpose, the invention provides the following technical scheme:
1. a metallurgical process for improving the microstructure of an alloy by means of nanoparticles, said process comprising the steps of:
(1) Preparing a nanoparticle metal-based master alloy: mixing nanoparticles with pure metal powder, and preparing the nanoparticles into a nanoparticle metal-based master alloy by a powder metallurgy method, wherein the metal in the pure metal powder has the highest content in the alloy to be improved;
(2) Preparing a casting blank alloy: and (2) uniformly mixing various metals in the alloy to be improved according to the composition proportion of the alloy to form a metal mixture, heating to melt, adding the nanoparticle metal-based master alloy prepared in the step (1), uniformly stirring, and casting in a die to form a casting blank alloy, namely the alloy with the improved microstructure.
Preferably, in the step (1), the powder metallurgy method is performed by a hot pressing sintering method, and specifically, the method comprises the following steps: mixing the nano particles with pure metal powder, sintering for 30min-1h under the pressure of 1-1000 MPa and at the temperature of 0.7-0.8 Tm, and cooling along with a furnace to obtain the nano-particles, wherein Tm is the absolute melting point of metal in the pure metal powder.
Further preferably, the decomposition temperature of the nanoparticles is greater than the melting point of the metal in the pure metal powder; no chemical reaction occurs between the nanoparticles and the pure metal powder during the hot pressing sintering process.
Further preferably, the nanoparticles are spherical and spheroidal, and the particle size of the nanoparticles is 10 nm-200 nm.
Further preferably, the nanoparticles comprise at least one of nano-carbide ceramic particles, nano-nitride ceramic particles, nano-oxide ceramic particles, or nano-boride ceramic particles.
Preferably, the nanoparticles are SiC,MoC、WC、Al 2 O 3 BN or TiB 2 At least one of (1).
Preferably, in the step (1), the metal in the pure metal powder is any one of Fe, cu, al or Mg;
the mass ratio of the nano particles to the pure metal powder is 1.
Preferably, in the step (2), the mass ratio of the nanoparticle metal-based master alloy to the metal mixture is 1.
2. The casting blank alloy is prepared according to the metallurgical method.
The invention has the beneficial effects that: the invention discloses a metallurgy method for improving alloy micro-morphology through nanoparticles, which is characterized in that nanoparticles are mixed into pure metal powder through a powder metallurgy method to form a nanoparticle metal-based master alloy, and then the nanoparticle metal-based master alloy is continuously heated and melted with the pure metal and uniformly stirred to cast a blank. Compared with the traditional process in which a chemical modifier is added and the solidification speed is controlled, the invention can control the as-cast microstructure of the alloy by regulating and controlling the content of the nanoparticles in the nanoparticle metal-based master alloy and the content of the nanoparticle metal-based master alloy in the casting blank alloy so as to improve the material performance, and has the advantages of simpler process operation, low cost and suitability for large-scale and industrial production.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is SEM testing of different materials during the metallurgical process of example 1, wherein a is a common as-cast CuCr alloy and b is the billet alloy prepared in example 1;
FIG. 2 is a diagram illustrating Cr distribution of different materials detected during the metallurgical process of example 1, wherein a is a common as-cast CuCr alloy, and b is the casting blank alloy prepared in example 1.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Example 1
A metallurgy method for improving the microstructure of a CuCr alloy by adding nano particles into the CuCr alloy comprises the following steps:
(1) Ball-milling 900g of copper powder and 100g of SiC nano particles in a high-energy ball mill at the rotating speed of 500rpm to uniformly mix the copper powder and the SiC nano particles, and then preparing the uniformly mixed mixture into a SiC-copper base master alloy (the mass is about 1000 g) by a hot-pressing sintering method (sintering the mixed nano particles-copper powder at the high temperature of 1000 ℃ and the high pressure of 10 MPa);
(2) 890g of Cu particles and 10g of Cr particles are uniformly mixed in an alumina crucible, heated and melted, and then 100g of SiC-copper base master alloy prepared in the step (1) is added under stirring, and after uniform stirring, casting is carried out in a die to form a casting blank alloy, namely the Cu-Cr alloy with the morphology improved by SiC nano particles.
SEM tests of different materials in the metallurgical process of example 1 show that a is a common as-cast CuCr alloy and b is the cast alloy prepared in example 1. The results of the detection of the Cr distribution of different materials in the metallurgical process of example 1 are shown in FIG. 2, wherein a is a common as-cast CuCr alloy, and b is the cast alloy prepared in example 1. As can be seen from FIGS. 1 and 2, the addition of nanoparticles does change the morphology of CuCr alloy and the distribution of metallic Cr by the metallurgical method of example 1.
Example 2
A metallurgy method for improving the microstructure of an AlBi alloy by adding nano particles into the AlBi alloy comprises the following steps:
(1) Ball milling 950g of aluminum powder and 50g of WC nanoparticles in a high-energy ball mill at the rotating speed of 600rpm to uniformly mix, and then preparing the uniformly mixed mixture into a WC-aluminum-based master alloy (the mass is about 1000 g) by a hot-pressing sintering method (the mixed nanoparticles, namely the aluminum powder, are sintered at the high temperature of 520 ℃ and the high pressure of 10 MPa);
(2) And (2) melting 850g of Al particles and 50g of Bi particles in an alumina crucible, adding 100g of the WC-aluminum-based master alloy prepared in the step (1) into a high-temperature solution under stirring, uniformly stirring, and casting in a mould to form a casting blank alloy, namely the Al-Bi alloy with the morphology improved by the WC nanoparticles.
Example 3
A metallurgy method for improving the microstructure of an AlBi alloy by adding nano particles into the AlBi alloy comprises the following steps:
(1) Ball milling 50g of aluminum powder and 50g of WC nanoparticles in a high-energy ball mill at the rotating speed of 600rpm to uniformly mix, and then preparing the uniformly mixed mixture into a WC-aluminum-based master alloy (the mass is about 100 g) by a hot-pressing sintering method (the mixed nanoparticles-aluminum powder are sintered at the high temperature of 520 ℃ and the high pressure of 10 MPa);
(2) And (2) melting 850g of Al particles and 50g of Bi particles in an alumina crucible, adding 9.1g of WC-aluminum-based master alloy prepared in the step (1) into a high-temperature solution under stirring, uniformly stirring, and casting in a mould to form a casting blank alloy, namely the Al-Bi alloy with the morphology improved by the WC nanoparticles.
Similarly, the performance tests of the products prepared in example 2 and example 3, as the product in example 1, are substantially consistent, and the alloy in example 3 is subjected to the action of the WC nanoparticles, and the morphology is changed.
In conclusion, the invention discloses a metallurgy method for improving the alloy micro-morphology through nanoparticles, which comprises the steps of mixing the nanoparticles into pure metal powder through a powder metallurgy method to form a nanoparticle metal-based master alloy, and then continuously heating and melting the master alloy and the pure metal, and uniformly stirring the master alloy and the pure metal to cast a blank. Compared with the traditional process in which a chemical modifier is added and the solidification speed is controlled, the method can control the as-cast microstructure of the alloy by regulating the content of the nanoparticles in the nanoparticle metal-based master alloy and the content of the nanoparticle metal-based master alloy in the casting blank alloy so as to improve the material performance, and has the advantages of simpler process operation, low cost and suitability for large-scale and industrial production.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A metallurgical process for improving the microstructure of an alloy by means of nanoparticles, said process comprising the steps of:
(1) Preparing a nanoparticle metal-based master alloy: mixing nanoparticles with pure metal powder, and preparing the nanoparticles into a nanoparticle metal-based master alloy by a powder metallurgy method, wherein the metal in the pure metal powder has the highest content in the alloy to be improved;
(2) Preparing a casting blank alloy: and (2) uniformly mixing various metals in the alloy to be improved according to the composition proportion of the alloy to form a metal mixture, heating to melt, adding the nanoparticle metal-based master alloy prepared in the step (1), uniformly stirring, and casting in a mould to form a casting blank alloy, namely the alloy with the improved microstructure.
2. The metallurgical process according to claim 1, wherein in step (1), the powder metallurgical process is carried out by a hot pressing sintering process, in particular: mixing the nano particles with pure metal powder, sintering for 30min-1h under the pressure of 1-1000 MPa and at the temperature of 0.7-0.8 Tm, and cooling along with a furnace to obtain the nano-particles, wherein Tm is the absolute melting point of metal in the pure metal powder.
3. The metallurgical process of claim 2, wherein the nanoparticles have a decomposition temperature greater than the melting point of the metal in the pure metal powder; no chemical reaction occurs between the nanoparticles and the pure metal powder during the hot pressing sintering process.
4. The metallurgical process of claim 2, wherein the nanoparticles are spherical and spheroidal, and the particle size of the nanoparticles is in the range of 10nm to 200nm.
5. The metallurgical process of claim 2, wherein the nanoparticles comprise at least one of nano-carbide ceramic particles, nano-nitride ceramic particles, nano-oxide ceramic particles, or nano-boride ceramic particles.
6. The metallurgical process of claim 1, wherein the nanoparticles are SiC, moC, WC, al 2 O 3 BN or TiB 2 At least one of (a).
7. The metallurgical method according to claim 1, wherein in the step (1), the metal in the pure metal powder is any one of Fe, cu, al or Mg;
the mass ratio of the nano particles to the pure metal powder is 1.
8. The metallurgical process of claim 1, wherein in step (2), the mass ratio of the nanoparticle metal-based master alloy to the metal mixture is 1.
9. A billet alloy obtainable by a metallurgical process according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211326964.6A CN115747547A (en) | 2022-10-26 | 2022-10-26 | Metallurgical method for improving alloy micro-morphology through nanoparticles, product and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211326964.6A CN115747547A (en) | 2022-10-26 | 2022-10-26 | Metallurgical method for improving alloy micro-morphology through nanoparticles, product and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115747547A true CN115747547A (en) | 2023-03-07 |
Family
ID=85353710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211326964.6A Pending CN115747547A (en) | 2022-10-26 | 2022-10-26 | Metallurgical method for improving alloy micro-morphology through nanoparticles, product and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115747547A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109023082A (en) * | 2018-09-06 | 2018-12-18 | 吉林大学 | A kind of method of the ceramics particle strengthened steel of the micro biphase in original position |
| CN109321767A (en) * | 2018-09-30 | 2019-02-12 | 郑州轻工业学院 | A kind of method that compound augmentation prepares aluminium based composite material enhanced by miscellaneous granules |
| CN109852834A (en) * | 2018-12-21 | 2019-06-07 | 昆明理工大学 | A kind of preparation method of nano-ceramic particle enhancing Metal Substrate classification configuration composite material |
| CN110172617A (en) * | 2019-05-30 | 2019-08-27 | 同济大学 | Add the aluminum matrix composite and preparation method thereof of tungsten disulfide self-lubricating nano particle |
| CN110629106A (en) * | 2019-11-08 | 2019-12-31 | 沈阳工业大学 | Method for reinforcing nodular cast iron material by using nano SiO2 particles |
| CN112210694A (en) * | 2020-10-21 | 2021-01-12 | 吉林大学 | Nanoparticle toughened ZTC4 titanium alloy and preparation method thereof |
| CN112247156A (en) * | 2020-10-21 | 2021-01-22 | 吉林大学 | Titanium alloy powder of endogenous nano TiC particles and preparation method and application thereof |
| CN112251646A (en) * | 2020-10-21 | 2021-01-22 | 吉林大学 | Titanium alloy powder of endogenous nano composite ceramic particles and preparation method and application thereof |
| CN112481516A (en) * | 2020-11-24 | 2021-03-12 | 中北大学 | Al-Ti-SiC intermediate alloy and preparation method and application thereof |
| CN112522564A (en) * | 2020-11-13 | 2021-03-19 | 吉林大学 | TiB2Particle reinforced nickel-based casting high-temperature alloy and preparation method thereof |
| CN113755725A (en) * | 2021-09-08 | 2021-12-07 | 江西理工大学 | Multi-scale particle modified 6000 series alloy wire rod and preparation method thereof |
-
2022
- 2022-10-26 CN CN202211326964.6A patent/CN115747547A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109023082A (en) * | 2018-09-06 | 2018-12-18 | 吉林大学 | A kind of method of the ceramics particle strengthened steel of the micro biphase in original position |
| CN109321767A (en) * | 2018-09-30 | 2019-02-12 | 郑州轻工业学院 | A kind of method that compound augmentation prepares aluminium based composite material enhanced by miscellaneous granules |
| CN109852834A (en) * | 2018-12-21 | 2019-06-07 | 昆明理工大学 | A kind of preparation method of nano-ceramic particle enhancing Metal Substrate classification configuration composite material |
| CN110172617A (en) * | 2019-05-30 | 2019-08-27 | 同济大学 | Add the aluminum matrix composite and preparation method thereof of tungsten disulfide self-lubricating nano particle |
| CN110629106A (en) * | 2019-11-08 | 2019-12-31 | 沈阳工业大学 | Method for reinforcing nodular cast iron material by using nano SiO2 particles |
| CN112210694A (en) * | 2020-10-21 | 2021-01-12 | 吉林大学 | Nanoparticle toughened ZTC4 titanium alloy and preparation method thereof |
| CN112247156A (en) * | 2020-10-21 | 2021-01-22 | 吉林大学 | Titanium alloy powder of endogenous nano TiC particles and preparation method and application thereof |
| CN112251646A (en) * | 2020-10-21 | 2021-01-22 | 吉林大学 | Titanium alloy powder of endogenous nano composite ceramic particles and preparation method and application thereof |
| CN112522564A (en) * | 2020-11-13 | 2021-03-19 | 吉林大学 | TiB2Particle reinforced nickel-based casting high-temperature alloy and preparation method thereof |
| CN112481516A (en) * | 2020-11-24 | 2021-03-12 | 中北大学 | Al-Ti-SiC intermediate alloy and preparation method and application thereof |
| CN113755725A (en) * | 2021-09-08 | 2021-12-07 | 江西理工大学 | Multi-scale particle modified 6000 series alloy wire rod and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104674038B (en) | Alloy material with high strength as well as ductility and semi-solid state sintering preparation method and application of alloy material | |
| CN108642402B (en) | Aluminum nitride dispersion strengthening powder metallurgy aluminum high-speed steel and preparation method thereof | |
| CA3043233A1 (en) | Aluminum alloy products having fine eutectic-type structures, and methods for making the same | |
| US4705560A (en) | Process for producing metallic powders | |
| CN111014703B (en) | Preparation method of nickel-based alloy powder for laser cladding | |
| CN109957684B (en) | Preparation method of high-strength heat-resistant aluminum alloy material for automobile parts | |
| CN113337746A (en) | Preparation method of carbide-reinforced high-entropy alloy composite material | |
| CN114525425A (en) | MC type carbide reinforced nickel-based superalloy composite material, preparation method and application thereof | |
| CN108251670B (en) | Preparation method of high-temperature-resistant intermetallic compound alloy | |
| Behnamfard et al. | Study on the incorporation of ceramic nanoparticles into the semi-solid A356 melt | |
| JPS6289803A (en) | Powdery particle for fine granular hard alloy and its production | |
| CN114703391A (en) | Nano-oxide dispersion strengthened copper alloy and preparation method thereof | |
| US10058917B2 (en) | Incorporation of nano-size particles into aluminum or other light metals by decoration of micron size particles | |
| CN110983152B (en) | Fe-Mn-Si-Cr-Ni based shape memory alloy and preparation method thereof | |
| CN115747547A (en) | Metallurgical method for improving alloy micro-morphology through nanoparticles, product and application thereof | |
| US20210254194A1 (en) | Preparation method for magnesium matrix composite | |
| JPH04325648A (en) | Production of sintered aluminum alloy | |
| JP4008597B2 (en) | Aluminum-based composite material and manufacturing method thereof | |
| US3522020A (en) | Stainless steels | |
| WO2003080881A1 (en) | Process for the production of al-fe-v-si alloys | |
| CN111334694B (en) | Method for modifying LPSO structure in magnesium alloy through primary nano disperse phase | |
| Kim et al. | Study on microstructure and mechanical properties of the Al–25Cr–5Si (at%) alloy powder using gas-atomization and SPS process | |
| CN114682774A (en) | Spherical Ti/TC4-TiC composite powder and preparation method thereof | |
| CN105478780A (en) | Method for preparing engine cylinder head by powder metallurgy process | |
| CN114058971A (en) | Ultrahigh vanadium high-speed steel 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 |