CN101462123B - Method for preparing high-performance magnesium alloy sheet - Google Patents
Method for preparing high-performance magnesium alloy sheet Download PDFInfo
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- CN101462123B CN101462123B CN2009100762818A CN200910076281A CN101462123B CN 101462123 B CN101462123 B CN 101462123B CN 2009100762818 A CN2009100762818 A CN 2009100762818A CN 200910076281 A CN200910076281 A CN 200910076281A CN 101462123 B CN101462123 B CN 101462123B
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- magnesium alloy
- casting
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- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title abstract description 14
- 238000000137 annealing Methods 0.000 claims abstract description 56
- 238000005096 rolling process Methods 0.000 claims abstract description 44
- 238000005098 hot rolling Methods 0.000 claims abstract description 20
- 238000002360 preparation method Methods 0.000 claims abstract description 5
- 238000005266 casting Methods 0.000 claims description 36
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 239000006104 solid solution Substances 0.000 claims description 4
- 238000013019 agitation Methods 0.000 claims description 3
- 238000006356 dehydrogenation reaction Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 2
- 239000003595 mist Substances 0.000 claims description 2
- 239000013078 crystal Substances 0.000 abstract description 5
- 238000001953 recrystallisation Methods 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000011777 magnesium Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000005482 strain hardening Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 229910000806 Latten Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- -1 therefore Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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- Continuous Casting (AREA)
- Metal Rolling (AREA)
Abstract
The invention relates to a method for preparing a high performance magnesium alloy sheet, which belongs to the technical field of magnesium alloy preparation. The method is characterized by comprising: firstly, smelting out a magnesium alloy fused mass conforming to the requirements on components and then, adopting a double-roller rolling mill to produce rolling sheet blanks; heating the rolling sheet blanks to a set temperature so as to carry out hot rolling and matching with intermediate annealing in the hot rolling process so as to ensure that the sheets have perfect recrystallization and eliminate processing hardening; and subsequently, thermally rolling the hot rolled sheets to the needed thickness and carrying out final annealing on the magnesium alloy sheets so as to obtain the high performance magnesium alloy sheets with fine and uniform crystal grains. The prepared magnesium alloy sheets have the advantages of higher tensile strength, yield strength and elongation.
Description
Technical field
The invention belongs to the magnesium alloy preparing technical field.
Background technology
Magnesium alloy is with a wide range of applications in industries such as automobile, Aeronautics and Astronautics, electronics and sports goods.And Application of Magnesium only concentrates on cast magnesium alloy at present, especially is fit to diecast magnesium alloy, and the application of wrought magnesium alloy remains further to be developed.Sheet material is the most popular material of metal, and sheet material accounts for more than 60% of total metal content in the conventional metals structural material.And sheet material is less than 2% of output aggregate in the present magnesium alloy, therefore, magnesium alloy plate, especially thin plate, development space is very big.
The close-packed hexagonal structure of magnesium has determined that its temperature-room type plasticity deformability is relatively poor, and conventional rolling mill practice can't satisfy the requirement of producing high performance magnesium alloy board.Casting-rolling technology is with casting and a kind of short flow process that combines of rolling mill practice, plank stuff production technology efficiently.Adopt casting-rolling technology can directly produce the casting plate of thickness less than 6mm and excellent performance.But adopt casting-rolling technology to produce magnesium alloy plate, especially thin plate, sport technique segment is more, and difficulty is bigger, and it is very necessary to develop rational production technology and method.Technical difficult points is stressed, the deformation temperature of protection, process of setting of magnesium alloy fused mass and the control of drafts.Patent search result shows, mainly concentrates on the exploitation of casting and rolling installation and casting-rolling technology at present about the patent of roll-casting of magnesium alloy plate, does not retrieve the patent of distributing rationally about cast-rolled block, hot rolling, warm-rolling and annealing whole process flow.
Summary of the invention
The present invention is by giving full play to the structure property of cast-rolled block excellence, complex optimum subsequent hot rolled, warm-rolling and annealing process, and it is thick to have developed a kind of production 0.8～2mm, the production technology of the magnesium alloy sheet that 600mm is wide.The casting lath particle size that the present invention produces is about 4～7 μ m, and tensile strength is greater than 280MPa, and yield strength is greater than 190MPa, and percentage elongation can be realized large-scale industrial production greater than 20%.
The present invention at first melts out the magnesium alloy fused mass that meets the composition requirement, adopts twin-roll cast-rolling mill to produce cast-rolled block afterwards.Cast-rolled block is heated to design temperature carries out hot rolling, in course of hot rolling, cooperate rational intermediate annealing, make sheet material generation perfect recrystallization, eliminate work hardening.Afterwards with the hot rolled plate warm-rolling to desired thickness.At last magnesium alloy sheet is carried out final annealing, obtain the tiny and uniform high-performance magnesium alloy sheet of crystal grain.
The invention is characterized in: contain following steps successively:
1) casting
1.1) alloy melting: prepare burden by set component, under protective atmosphere, be heated to fusion temperature, after the strong agitation, carry out dehydrogenation and handle, make melt clean and be evenly distributed;
1.2) the high temperature casting: under 670～740 ℃ of casting temperature, with above-mentioned melt refining; To cast roller and be preheating to 140～240 ℃, regulating casting speed is 2～10m/min, carries out casting, obtains strand; In the casting and rolling machine outlet air cooling equipment is set, the high temperature cast-rolled block after just solidifying is carried out air-blast quenching, make the solid solution of slab part;
2) homogenizing annealing: annealing temperature is 450～500 ℃, and annealing time is 60～180h;
3) hot rolling: the casting base is heated to 440～500 ℃, and roll is heated to 150～240 ℃, carries out hot rolling, and reduction in pass is controlled at 15～30%; Carry out an intermediate annealing after rolling 1 or 2 passages, 250～400 ℃ of intermediate annealing temperature, annealing time 30min～90min;
4) warm-rolling: the slab after the hot rolling is heated to 240～300 ℃, and roll is heated to 100～160 ℃, carries out warm-rolling, reduction in pass is controlled at 5～10%, carry out an intermediate annealing after rolling 1 or 2 passages, 250～350 ℃ of intermediate annealing temperature, annealing time 30min～90min;
5) final annealing: 200～350 ℃ of annealing temperatures, annealing time are 60～120min.
The casting and rolling machine that adopts is a twin-roll cast-rolling mill.
The 1.1st) protective atmosphere described in the step is SF
6And N
2Mist.
At first melt out the magnesium alloy fused mass that meets the composition requirement, adopt twin-roll cast-rolling mill to produce cast-rolled block afterwards.Cast-rolled block is heated to design temperature carries out hot rolling, in course of hot rolling, cooperate rational intermediate annealing, make sheet material generation perfect recrystallization, eliminate work hardening.Afterwards with the hot rolled plate warm-rolling to desired thickness.At last magnesium alloy sheet is carried out final annealing, obtain the tiny and uniform high-performance magnesium alloy sheet of crystal grain.
Experiment showed, that the U.S. latten crystal grain that the present invention prepares is tiny evenly, have advantages of higher tensile strength, yield strength and percentage elongation.
The specific embodiment
According to the alloying component of following magnesium alloy sheet for carrying out proportioning:
2.5%～3.5%Al, 0.6%～1.4%Zn, Fe≤0.005%, Si≤0.08%, Cu≤0.01%, Ni≤0.001, Ca≤0.04%, all the other are Mg.
Production technology is:
1) casting-rolling technology
1.1) alloy melting:
Prepare burden by set component, afterwards at SF
6+ N
2Be heated to 640～660 ℃ from room temperature under the protective atmosphere, make the batching fusing.Be warming up to 700～720 ℃, add intermediate alloy, strong agitation is uniformly dispersed the interpolation alloy, insulation 25-30min.Be warming up to 720～750 ℃, feed argon gas 10～15min in the melt, carry out dehydrogenation and handle, it is comparatively even to continue stirring until melt simultaneously.
1.2) the high temperature casting:
Temperature returned drop to 670～740 ℃ of casting temperature, refining 20～30min.The casting roller of twin-roll cast-rolling mill is preheating to 140～240 ℃, and regulating casting speed is 2～10m/min, carries out casting, and obtaining slab thickness is 6mm.In the outlet of casting and rolling machine slab the curtain type air cooling equipment is set, the high temperature cast-rolled block that leaves the casting roller after just solidifying is carried out air-blast quenching, make the solid solution of slab part.
2) homogenizing annealing
Before the hot rolling, cast-rolled block is carried out homogenizing annealing, annealing temperature is 440～550 ℃, and annealing time is 1～3h.
2) hot rolling technology
The casting base is heated to 440～500 ℃, and roll is heated to 150～240 ℃, carries out hot rolling, and reduction in pass is controlled at 15～30%.An intermediate annealing of the laggard row of rolling one or two passages makes slab that crystallization again take place, and eliminates work hardening, improves plastic deformation ability, and intermediate annealing process is: 250～400 ℃ of annealing temperatures, annealing time 30min～90min.
3) warm-rolling technology
Slab after the hot rolling is heated to 240～300 ℃, and roll is heated to 100～160 ℃, carries out warm-rolling, reduction in pass is controlled at 5～10%, an intermediate annealing of the laggard row of rolling two passages, intermediate annealing process is: 250～350 ℃ of annealing temperatures, annealing time 30min～90min.
4) finished product annealing process
Through the comparative analysis to different casting plate annealing back mechanical property, determine that best parameter and annealing is: 200～350 ℃ of annealing temperatures, annealing time are 60～120min.
Provide 5 embodiment according to above-mentioned process, the mechanical property parameters of the magnesium alloy sheet of used parameter and acquisition sees Table one:
Table one
| Numbering | Production board thickness/mm | The casting temperature/℃ | Casting roller preheat temperature/℃ | Casting speed/m.min -1 | The homogenizing annealing temperature/℃ | Homogenizing annealing time/min | Hot-rolled temperature/℃ |
| 1? | 0.8? | 740? | 220? | 8? | 450? | 120? | 460? |
| 2? | 1? | 680? | 240? | 10? | 440? | 60? | 450? |
| 3? | 1.2? | 730? | 200? | 7? | 480? | 90? | 500? |
| 4? | 1.5? | 670? | 140? | 4? | 550? | 120? | 440? |
| 5? | 2? | 720? | 160? | 2? | 500? | 180? | 500? |
Table one is continuous
| Numbering | The hot roll temperature/℃ | Hot rolling intermediate annealing temperature/℃ | Hot rolling intermediate annealing time/min | The warm-rolling temperature/℃ | The warm-rolling roll temperature/℃ | Warm-rolling intermediate annealing temperature/℃ | Warm-rolling intermediate annealing time/min |
| 1? | 220? | 280? | 60? | 250? | 150? | 280? | 30? |
| 2? | 240? | 250? | 30? | 240? | 160? | 250? | 60? |
| 3? | 200? | 300? | 70? | 300? | 120? | 300? | 60? |
| 4? | 150? | 360? | 90? | 270? | 100? | 320? | 30? |
| 5? | 180? | 400? | 90? | 300? | 120? | 350? | 90? |
Table one is continuous
| Numbering | The finished products temperature/℃ | Finished products time/min | Tensile strength/MPa | Yield strength/MPa | Percentage elongation (gauge length 50mm)/% |
| 1? | 200? | 120? | 295? | 213? | 21.7? |
| 2? | 250? | 90? | 303? | 203? | 29.9? |
| 3? | 300? | 60? | 298? | 196? | 25.3? |
| 4? | 350? | 60? | 297? | 200? | 22.2? |
| 5? | 270? | 120? | 282? | 191? | 20.6? |
The present invention is by the cooperation between complex optimum casting, hot rolling, warm-rolling and annealing operation and each operation, obtains finally that crystal grain is tiny evenly, thickness is at the magnesium alloy sheet of 0.8～2mm.The crystallite dimension of final magnesium alloy sheet is 4～7 μ m, has excellent mechanical property.In the outlet of casting and rolling machine slab the curtain type air cooling equipment is set, obtains the slab of part solid solution, improved the following process ability of casting plate and the mechanical property of magnesium alloy sheet.The magnesium alloy sheet tensile strength that the present invention produced is greater than 280MPa, and yield strength is greater than 190MPa, and percentage elongation is greater than 20%.
Claims (3)
1. the preparation method of a high-performance magnesium alloy sheet is characterized in that, contains following steps successively:
1) casting
1.1) alloy melting: prepare burden by set component, under protective atmosphere, be heated to fusion temperature, after the strong agitation, carry out dehydrogenation and handle, make melt clean and be evenly distributed;
1.2) the high temperature casting: under 670～740 ℃ of casting temperature, with above-mentioned melt refining; To cast roller and be preheating to 140～240 ℃, regulating casting speed is 2～10m/min, carries out casting, obtains strand; In the casting and rolling machine outlet air cooling equipment is set, the high temperature cast-rolled block after just solidifying is carried out air-blast quenching, make the solid solution of slab part;
2) homogenizing annealing: annealing temperature is 450～500 ℃, and annealing time is 60～180h;
3) hot rolling: the casting base is heated to 440～500 ℃, and roll is heated to 150～240 ℃, carries out hot rolling, and reduction in pass is controlled at 15～30%; Carry out an intermediate annealing after rolling 1 or 2 passages, 250～400 ℃ of intermediate annealing temperature, annealing time 30min～90min;
4) warm-rolling: the slab after the hot rolling is heated to 240～300 ℃, and roll is heated to 100～160 ℃, carries out warm-rolling, reduction in pass is controlled at 5～10%, carry out an intermediate annealing after rolling 1 or 2 passages, 250～350 ℃ of intermediate annealing temperature, annealing time 30min～90min;
5) final annealing: 200～350 ℃ of annealing temperatures, annealing time are 60～120min.
2. the preparation method of high-performance magnesium alloy sheet as claimed in claim 1 is characterized in that, the casting and rolling machine of employing is a twin-roll cast-rolling mill.
3. the preparation method of high-performance magnesium alloy sheet as claimed in claim 1 is characterized in that, the 1.1st) protective atmosphere described in the step is SF
6And N
2Mist.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100762818A CN101462123B (en) | 2009-01-09 | 2009-01-09 | Method for preparing high-performance magnesium alloy sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100762818A CN101462123B (en) | 2009-01-09 | 2009-01-09 | Method for preparing high-performance magnesium alloy sheet |
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| Publication Number | Publication Date |
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| CN101462123A CN101462123A (en) | 2009-06-24 |
| CN101462123B true CN101462123B (en) | 2011-05-11 |
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| CN2009100762818A Expired - Fee Related CN101462123B (en) | 2009-01-09 | 2009-01-09 | Method for preparing high-performance magnesium alloy sheet |
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Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101658859B (en) * | 2009-09-29 | 2011-05-11 | 哈尔滨工业大学 | Rolling manufacture method for magnesium or magnesium alloy foil |
| CN102416405B (en) * | 2011-09-29 | 2013-08-14 | 西部钛业有限责任公司 | Method for processing magnesium alloy wide-width medium-thick plate |
| CN102586561A (en) * | 2012-02-27 | 2012-07-18 | 江苏诚德钢管股份有限公司 | Processing technology of large-size high-strength magnesium alloy sheet |
| CN103388116B (en) * | 2013-08-09 | 2015-07-01 | 重庆大学 | Method for effectively rolling Mg-Al-Zn magnesium alloys |
| CN104308456B (en) * | 2014-08-14 | 2017-04-19 | 中国重型机械研究院股份公司 | Magnesium or magnesium alloy strip coil production process |
| CN105234174B (en) * | 2015-08-31 | 2017-04-05 | 东北大学 | A kind of milling method of magnesium and magnesium alloy strip in razor-thin |
| CN105414183B (en) * | 2015-11-30 | 2018-06-26 | 太原科技大学 | Roll-casting of magnesium alloy plate prepares the process of wide sheet |
| CN106862272B (en) * | 2015-12-14 | 2020-01-31 | 宝山钢铁股份有限公司 | Preparation method of high-strength high-ductility magnesium alloy plates |
| CN107999538B (en) * | 2017-12-02 | 2020-03-17 | 吉林大学 | Pre-deformation auxiliary heat treatment and rolling method for high-volume-fraction second-phase magnesium alloy |
| CN110404966A (en) * | 2018-04-27 | 2019-11-05 | 宝山钢铁股份有限公司 | It is used to prepare the roughing technique and method of high-strength high-tractility magnesium alloy thin plate |
| CN109504884B (en) * | 2019-01-10 | 2020-07-28 | 吉林大学 | Multi-element small-quantity high-strength plastic magnesium alloy and large-reduction-quantity short-flow preparation method thereof |
| CN109468560A (en) * | 2019-01-15 | 2019-03-15 | 吉林大学 | Second phase homogenization regulation preparation method in a kind of high aluminium content casting magnesium alloy plate |
| CN110125201A (en) * | 2019-05-23 | 2019-08-16 | 广东省材料与加工研究所 | A kind of magnesium alloy anode thin plate and preparation method thereof |
| CN111922081B (en) * | 2019-06-26 | 2021-11-26 | 太原科技大学 | Continuous casting-rolling and rolling short-process preparation method of special-shaped magnesium alloy section |
| CN113070455B (en) * | 2021-03-19 | 2023-09-12 | 合肥诺瓦新材料科技有限公司 | Double-roller casting and rolling method for preparing high-performance LPSO (low-pressure-sensitive adhesive) magnesium alloy plate and method thereof |
| CN114517277B (en) * | 2022-04-21 | 2022-07-19 | 中铝材料应用研究院有限公司 | Aluminum alloy thick plate and preparation method thereof |
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