CN114635098A - Grain size and precipitated phase dual-isomerous magnesium alloy and preparation method thereof - Google Patents
Grain size and precipitated phase dual-isomerous magnesium alloy and preparation method thereof Download PDFInfo
- Publication number
- CN114635098A CN114635098A CN202210323914.6A CN202210323914A CN114635098A CN 114635098 A CN114635098 A CN 114635098A CN 202210323914 A CN202210323914 A CN 202210323914A CN 114635098 A CN114635098 A CN 114635098A
- Authority
- CN
- China
- Prior art keywords
- magnesium alloy
- grain size
- dual
- alloy plate
- precipitated phase
- 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
- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 64
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 230000032683 aging Effects 0.000 claims abstract description 23
- 239000006104 solid solution Substances 0.000 claims abstract description 17
- 238000001125 extrusion Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000001192 hot extrusion Methods 0.000 claims abstract description 6
- 230000009977 dual effect Effects 0.000 claims description 11
- 239000000243 solution Substances 0.000 claims description 6
- 238000001556 precipitation Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 description 10
- 239000013078 crystal Substances 0.000 description 5
- 238000012876 topography Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000748 Gd alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- 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
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Extrusion Of Metal (AREA)
Abstract
The invention discloses a dual-isomerous magnesium alloy with grain size and precipitated phase and a preparation method thereof, wherein the method comprises the following steps: step one, carrying out solid solution treatment on an as-cast magnesium alloy plate to obtain a solid solution magnesium alloy plate; step two, carrying out aging treatment on the solid-solution magnesium alloy plate to obtain an aged magnesium alloy plate; the aging temperature is 150-250 ℃, and the aging time is 8-60 h; and thirdly, performing hot extrusion on the aged magnesium alloy plate with the single-pass deformation of 80-90%, wherein the extrusion temperature is 200-280 ℃, and the extrusion speed is 5-6 mm/s. Which can improve the strength and plasticity of the magnesium alloy sheet at the same time.
Description
Technical Field
The invention relates to the field of magnesium alloy material processing, in particular to a dual-isomeric magnesium alloy with grain size and precipitated phase and a preparation method thereof.
Background
The magnesium alloy has low density, high specific strength, excellent shock absorption and electromagnetic shielding performance, and great application prospect as light weight material and functional material. The common magnesium alloy has a close-packed hexagonal crystal structure, has few slip systems which can be started at room temperature, has poor plasticity, and is difficult to realize high-strength high-plasticity combination through a conventional process.
The appearance of the heterogeneous material provides a new way for simultaneously improving the strength and the plasticity of the magnesium alloy, the heterogeneous material is composed of a coarse crystalline region and a fine crystalline region with obvious strength difference, and the grain size can be changed within the range from millimeter to nanometer. A large number of documents show that heterogeneous materials of different metals have excellent strong plastic matching compared with homogeneous structural materials, mainly because in the heterogeneous materials, the dislocation density in small grains can quickly reach saturation along with the increase of strain amount, so that the materials keep higher strength; the coarse grains have larger space to accommodate the dislocation newly generated in the plastic deformation, and provide higher work hardening capacity, so that the material keeps higher plasticity.
Based on the excellent mechanical properties exhibited by the heterogeneous materials, current research is mainly focused on the heterogeneous structure design of the grain size. In addition to grain size, heterogeneity in chemical composition, texture, hardness, precipitated phases is also typically included for heterogeneous metallic materials. In order to further optimize the mechanical properties of the heterogeneous metal materials, some researchers have constructed dual heterogeneous metal materials by adjusting the heterogeneity among the components to show excellent strong plastic combination, such as dual Mg-Gd alloy with grain size and texture, dual brass with lamellar structure and gradient distribution, dual low-carbon martensitic steel with grain size and dual phase isomerism, and the like. However, the preparation process of these dual heterostructures mainly focuses on various severe plastic deformation combined with subsequent annealing, and the preparation process is tedious, which undoubtedly results in increased cost, so that it is limited to laboratory research stage, and large-scale industrial preparation is difficult to achieve. In the previous research, the influence of the dual heterostructure of grain size and precipitated phase on the mechanical performance is little, so that the development of a method which has simple preparation process and low cost and can realize mass production of isomeric magnesium alloy materials with excellent strong plasticity matching is needed.
Disclosure of Invention
The invention aims to provide a dual-isomerous magnesium alloy with grain size and precipitated phase and a preparation method thereof, which can simultaneously improve the strength and plasticity of a magnesium alloy plate.
The preparation method of the dual-isomerous magnesium alloy with the grain size and the precipitated phase comprises the following steps:
step one, carrying out solid solution treatment on an as-cast magnesium alloy plate to obtain a solid solution magnesium alloy plate;
step two, carrying out aging treatment on the solid-solution magnesium alloy plate to obtain an aged magnesium alloy plate; the aging temperature is 150-250 ℃, and the aging time is 8-60 h;
and thirdly, carrying out hot extrusion with the single-pass deformation of 80-90% on the aged magnesium alloy plate, wherein the extrusion temperature is 200-280 ℃, and the extrusion speed is 5-6 mm/s.
Further, the solution treatment temperature in the first step is 400-450 ℃, and the solution treatment time is 16-24 hours.
Further, the as-cast magnesium alloy plate is an AZ magnesium alloy with high precipitation potential.
Further, the AZ-based magnesium alloy includes AZ61, AZ80, or AZ 91.
A dual-isomerous magnesium alloy with grain size and precipitated phase is prepared by the preparation method of the dual-isomerous magnesium alloy with grain size and precipitated phase.
Compared with the prior art, the invention has the following beneficial effects.
1. The method comprises the steps of firstly carrying out solid solution treatment on the as-cast magnesium alloy plate to ensure that the excess phase in the matrix is fully dissolved in the solid solution and then rapidly cooling to obtain the supersaturated solid solution. And then carrying out aging treatment on the solid-solution magnesium alloy plate, refining part of crystal grains in the matrix by controlling the aging temperature and the aging time, and simultaneously controlling the distribution, the size and the quantity of precipitated phases. And then carrying out hot extrusion with the single-pass deformation amount of 90% on the aging-state magnesium alloy plate, namely further refining crystal grains through large plastic deformation to obtain the magnesium alloy with double isomerism of crystal grain size and precipitated phase, and simultaneously improving the strength and plasticity of the as-cast-state magnesium alloy plate.
2. The method has the advantages of simple process, simple and easily obtained raw materials, wide application range and low cost, and can realize large-scale industrial production.
Drawings
FIG. 1 is a schematic of the process of the present invention;
FIG. 2 is a schematic of the micro-topography of A0;
FIG. 3 is a schematic of the micro-topography of A8;
FIG. 4 is a schematic of the micro-topography of A16;
FIG. 5 is a schematic of the micro-topography of A24;
FIG. 6 is a comparison of mechanical properties of magnesium alloy sheets in different processing states.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In a first embodiment, referring to fig. 1, a method for preparing a dual isomeric magnesium alloy having a grain size and a precipitate phase includes the following steps:
step one, carrying out solution treatment on an AZ91 as-cast magnesium alloy plate, wherein the AZ91 as-cast magnesium alloy plate has the length of 15mm, the width of 15mm and the height of 38 mm; the solid solution treatment temperature is 420 ℃, the solid solution treatment time is 20h, and the cooling mode is water cooling, so that the solid solution magnesium alloy plate is obtained.
And step two, carrying out aging treatment on the solid solution state magnesium alloy plate to obtain an aging state magnesium alloy plate, wherein the aging temperature is 200 ℃, and the aging time is 16 h.
And step three, polishing the surface of the aging-state magnesium alloy plate to remove oil, then performing hot extrusion with the single-pass deformation of 90%, after the temperature of an extrusion die and an extrusion cylinder is stable at 230 ℃, putting the polished and oil-removed plate into the extrusion cylinder, preserving the heat for 12min, performing extrusion, spraying graphite water on the inner wall of the extrusion cylinder as a lubricant before extrusion, wherein the extrusion speed is 6mm/s, and finally obtaining the dual-isomeric magnesium alloy with the thickness of about 3mm and the precipitated phase, which is recorded as A16.
Example two, a method for preparing a dual-structure magnesium alloy having a grain size and a precipitate phase, which is the same as example one except that the aging time is 8 hours, was carried out to obtain a magnesium alloy sheet designated as A8.
EXAMPLE III A process for producing a magnesium alloy sheet having a double structure of grain size and precipitate phase, which was identical to that of example I except that the aging time was 24 hours, was carried out to obtain a magnesium alloy sheet designated A24.
Comparative example an as-cast magnesium alloy sheet was subjected to solution treatment and hot extrusion treatment in this order, the process parameters of which were the same as those of example one, and the magnesium alloy sheet obtained was designated as A0.
Referring to fig. 2 to 5, the microstructure morphologies of a0, A8, a16 and a24 are observed, and the fine crystal proportion and precipitation phase in the microstructure are gradually increased along with the increase of the aging time, so that a remarkable dual-isomeric structure of grain size and precipitation phase is presented.
Mechanical property tests were performed on a0, A8, a16, a24, and the results are shown in fig. 6, where A8, a16, and a24 all exhibited superior strength and plasticity compared to the performance of a uniform texture magnesium alloy sheet material without prior aging treatment, i.e., a0, where the a16 sample has the best strong plastic bond. If the aging temperature is too high, Al element in the matrix is diffused quickly, the formation of a banded precipitated phase shown in figure 5 is accelerated, the mechanical property is deteriorated, and the stability of the precipitated phase is reduced due to high temperature; if the aging temperature is too low, the diffusion driving force of Al element is insufficient, and a limited dispersed fine precipitated phase is formed, and if the strengthening effect similar to that of A16 sample is achieved, the pre-aging time needs to be greatly prolonged, which increases the heat treatment cost accordingly.
Finally, while the present invention has been described in detail with reference to the preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention encompassed by the appended claims.
Claims (5)
1. A preparation method of a dual-isomerous magnesium alloy with grain size and precipitated phase is characterized by comprising the following steps:
step one, carrying out solid solution treatment on an as-cast magnesium alloy plate to obtain a solid solution magnesium alloy plate;
step two, carrying out aging treatment on the solid-solution magnesium alloy plate to obtain an aged magnesium alloy plate; the aging temperature is 150-250 ℃, and the aging time is 8-60 h;
and thirdly, carrying out hot extrusion with the single-pass deformation of 80-90% on the aged magnesium alloy plate, wherein the extrusion temperature is 200-280 ℃, and the extrusion speed is 5-6 mm/s.
2. The method for preparing a dual isomeric magnesium alloy having a grain size and a precipitated phase according to claim 1, wherein: the temperature of the solution treatment in the first step is 400-450 ℃, and the time of the solution treatment is 16-24 h.
3. The method for producing a grain size and precipitated phase dual magnesium alloy according to claim 1 or 2, characterized in that: the as-cast magnesium alloy plate is an AZ magnesium alloy with stronger precipitation potential.
4. The method for producing a dual isomeric magnesium alloy having a grain size and a precipitated phase according to claim 3, wherein: the AZ series magnesium alloy comprises AZ61, AZ80 or AZ 91.
5. A dual-isomerous magnesium alloy with grain size and precipitated phase is characterized in that: the magnesium alloy is prepared by the preparation method of the dual-structure magnesium alloy with the grain size and the precipitated phase according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210323914.6A CN114635098A (en) | 2022-03-30 | 2022-03-30 | Grain size and precipitated phase dual-isomerous magnesium alloy and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210323914.6A CN114635098A (en) | 2022-03-30 | 2022-03-30 | Grain size and precipitated phase dual-isomerous magnesium alloy and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114635098A true CN114635098A (en) | 2022-06-17 |
Family
ID=81952268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210323914.6A Pending CN114635098A (en) | 2022-03-30 | 2022-03-30 | Grain size and precipitated phase dual-isomerous magnesium alloy and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114635098A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104046934A (en) * | 2014-07-10 | 2014-09-17 | 重庆大学 | Method for preparing superfine magnesium-zinc-manganese alloy |
| CN106637010A (en) * | 2017-01-12 | 2017-05-10 | 西南大学 | Method for changing orientation of precipitated phase in magnesium alloy |
| CN108977710A (en) * | 2018-07-23 | 2018-12-11 | 上海交通大学 | A kind of extrusion casint magnesium alloy materials and preparation method thereof |
| CN109868380A (en) * | 2017-12-01 | 2019-06-11 | 南京理工大学 | A kind of preparation method of multiple dimensioned precipitation strength magnesium alloy materials |
| CN113430403A (en) * | 2021-05-17 | 2021-09-24 | 中北大学 | Method for preparing high-strength and high-toughness rare earth magnesium alloy through pre-aging |
| CN113637859A (en) * | 2021-08-11 | 2021-11-12 | 山东宏和轻量化科技有限公司 | Aluminum alloy and extrusion casting method and equipment thereof |
-
2022
- 2022-03-30 CN CN202210323914.6A patent/CN114635098A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104046934A (en) * | 2014-07-10 | 2014-09-17 | 重庆大学 | Method for preparing superfine magnesium-zinc-manganese alloy |
| CN106637010A (en) * | 2017-01-12 | 2017-05-10 | 西南大学 | Method for changing orientation of precipitated phase in magnesium alloy |
| CN109868380A (en) * | 2017-12-01 | 2019-06-11 | 南京理工大学 | A kind of preparation method of multiple dimensioned precipitation strength magnesium alloy materials |
| CN108977710A (en) * | 2018-07-23 | 2018-12-11 | 上海交通大学 | A kind of extrusion casint magnesium alloy materials and preparation method thereof |
| CN113430403A (en) * | 2021-05-17 | 2021-09-24 | 中北大学 | Method for preparing high-strength and high-toughness rare earth magnesium alloy through pre-aging |
| CN113637859A (en) * | 2021-08-11 | 2021-11-12 | 山东宏和轻量化科技有限公司 | Aluminum alloy and extrusion casting method and equipment thereof |
Non-Patent Citations (1)
| Title |
|---|
| SHUAISHUAI LIU等: "Achieving strength-ductility synergy of AZ91 extruded sheet by balancing dual-heterostructure of grain size and precipitates", 《MATERIALS SCIENCE&ENGINEERING A》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108220725B (en) | Preparation method of high-performance magnesium alloy bar | |
| Li et al. | Microstructural evolution of AZ91 magnesium alloy during extrusion and heat treatment | |
| JP5515167B2 (en) | Commercial magnesium alloy sheet with improved room temperature formability and method for producing the same | |
| CN101056998B (en) | Titanium aluminide based alloy | |
| CN1009741B (en) | Nickel base superalloy articles and methods of manufacture | |
| CN113430403B (en) | Method for preparing high-strength and high-toughness rare earth magnesium alloy through pre-aging | |
| CN1946861A (en) | Al-mg alloy sheet with excellent formability at high temperatures and high speeds and method of production of same | |
| Thirumurugan et al. | Extrusion and precipitation hardening behavior of AZ91 magnesium alloy | |
| CN110195178B (en) | High-strength high-plasticity heat-resistant flame-retardant magnesium alloy and manufacturing method thereof | |
| Zhan et al. | Production of Mg-Al-Zn magnesium alloy sheets with ultrafine-grain microstructure by accumulative roll-bonding | |
| CN104046934A (en) | Method for preparing superfine magnesium-zinc-manganese alloy | |
| JP2008190021A (en) | Al-Mg BASED ALLOY HOT ROLLED SHEET, AND METHOD FOR PRODUCING THE SAME | |
| CN113913660B (en) | Method for preparing magnesium alloy plate by hot-cold alternative rolling | |
| Madaj et al. | Magnesium-alloy die forgings for automotive applications | |
| CN109680194B (en) | Preparation method of high-strength extruded section of Mg-Zn-Sn-Mn alloy | |
| CN104152826A (en) | Heat treatment method for Mg-Al-Zn-Y rare-earth magnesium alloy | |
| Du et al. | Microstructure evolution and ductility improvement mechanisms of magnesium alloy in interactive alternating forward extrusion | |
| JP2008190022A (en) | Al-Mg-Si-BASED ALLOY HOT ROLLED SHEET, AND METHOD FOR PRODUCING THE SAME | |
| Wu et al. | Effect of rolling temperature on the microstructure and mechanical properties of AZ31 alloy sheet processed through variable-plane rolling | |
| CN115786833B (en) | Method for refining titanium-aluminum alloy microstructure through strong magnetic field treatment | |
| CN108251773B (en) | Extrusion method for preparing high-strength high-toughness wrought magnesium alloy and product | |
| CN114635098A (en) | Grain size and precipitated phase dual-isomerous magnesium alloy and preparation method thereof | |
| Xin et al. | Microstructure refining and property improvement of ZK60 magnesium alloy by hot rolling | |
| Li et al. | Dynamic recrystallization behavior of AZ31 magnesium alloy processed by alternate forward extrusion | |
| Chen et al. | Effect of impurity reduction on rollability of AZ31 magnesium alloy |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220617 |