CN102744258B - Rolling processing method of AZ31B magnesium alloy wide-width thin plates - Google Patents
Rolling processing method of AZ31B magnesium alloy wide-width thin plates Download PDFInfo
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Abstract
The invention discloses a rolling processing method of AZ31B magnesium alloy wide-width thin plates. The method includes that a 2800mm hot mill is adopted to roll AZ31B magnesium alloy slabs with thickness of 30-380mm and width of 750-2600mm for 1-2 heating numbers to obtain the AZ31B magnesium alloy wide-width thin plates with thickness of 3-7mm and width of 1200-2600mm. The large-sized hot mill is adopted to roll the AZ31B magnesium alloy slabs in large deformation mode, plate performance is improved through temperature-controlled rolling, and finally the AZ31B magnesium alloy wide-width thin plates which are good in surface quality, fine in plate shapes, high in plate yield and excellent in performance are obtained. Room temperature mechanical properties of the rolled AZ31B magnesium alloy wide-width thin plates are that Rm>=280MPa, Rp0.2>=210MPa and A50>=6%, and requirements of the ASTMB90/B90M-07 standard are met.
Description
Technical field
The invention belongs to magnesium alloy plate processing technique field, be specifically related to a kind of rolling processing method of AZ31B magnesium alloy wide-width thin plate.
Background technology
Magnesium alloy is as the lightest commercial structural metallic materials, have that specific strength is high, a series of good characteristics such as specific stiffness is large, antidamping and antimagnetic shield, be used on automobile, motorcycle, track train except reducing deadweight, improve vehicles dynamic performance and reduce energy consumption, also can significantly improve vehicle structure and absorb vibration and noise.Domestic production magnesium alloy plate does not have maturation, stable technology, and magnesium plate quality and the supply of material are stable not, and plate width narrower (general hot rolled plate width < 1500mm, cold-reduced sheet width < 600mm).Along with the increase to heavy in section, wide plate demand, industrialization level far can not satisfy the demands at present.In < < new material industry " 12 " development plan > >, point out, by the low-cost AZ series magnesium alloy extrusion section bar of propelling and wood-based panel industry (typical trade mark AZ31B), to carry out the application demonstrations such as the above magnesium alloy plate of wide cut 1500mm.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned the deficiencies in the prior art, and it is 3mm～7mm that a kind of thickness is provided, the hot rolling method of the AZ31B magnesium alloy wide-width thin plate that width is 1200mm～2600mm.The method utilizes large-scale hot-rolling machine magnesium alloy to be carried out to the rolling of large deformation, by 1～2 fire time rolling, make the crystal grain of magnesium alloy fully broken, by temperature-controlled rolling, improve plate property, finally obtain that surface quality is good, plate shape is good, lumber recovery is high, the AZ31B magnesium alloy wide-width thin plate of excellent performance, the room-temperature mechanical property R of the AZ31B magnesium alloy wide-width thin plate of rolling
m>=280MPa, R
p0.2>=210MPa, A
50>=6%, meet the requirement of ASTMB90/B90M-07 standard.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of rolling processing method of AZ31B magnesium alloy wide-width thin plate, it is characterized in that, the method is: adopting the hot-rolling mill of 2800mm is 30mm～380mm to thickness, width is that the AZ31B magnesium alloy slab of 750mm～2600mm carries out the inferior rolling of 1～2 fire, obtaining thickness is 3mm～7mm, the AZ31B magnesium alloy wide-width thin plate that width is 1200mm～2600mm; The system of described the first fire time rolling is: in breaking down temperature, be repeat-rolling 6～16 passages under the condition of 460 ℃～500 ℃, the pass deformation rate of controlled rolling is 10%～45%, and total reduction is 70%～95%; The system of described the second fire time rolling is: in breaking down temperature, be repeat-rolling 4～8 passages under the condition of 400 ℃～460 ℃, the pass deformation rate of controlled rolling is 10%～45%, and total reduction is 70%～97%.
The rolling processing method of above-mentioned a kind of AZ31B magnesium alloy wide-width thin plate, when carrying out the inferior rolling of 1 fire, the finishing temperature of controlled rolling is 220 ℃～240 ℃.
The rolling processing method of above-mentioned a kind of AZ31B magnesium alloy wide-width thin plate, when carrying out the inferior rolling of 2 fire, the finishing temperature of controlling the second fire time rolling is 220 ℃～240 ℃.
The present invention compared with prior art has the following advantages:
1, method of the present invention is simple, and processing ease is easily realized suitability for industrialized production.
2, adopting method of the present invention can process thickness is 3mm～7mm, and the AZ31B magnesium alloy wide-width thin plate that width is 1200mm～2600mm has been filled up the blank of home products.
3, the present invention utilizes large-scale hot-rolling machine AZ31B magnesium alloy slab to be carried out to the rolling of large deformation, by 1～2 fire time rolling, make the crystal grain of magnesium alloy fully broken, by temperature-controlled rolling, improve plate property, finally obtain that surface quality is good, plate shape is good, lumber recovery is high, the AZ31B magnesium alloy wide-width thin plate of excellent performance.
4, adopt the room-temperature mechanical property R of the AZ31B magnesium alloy wide-width thin plate of method rolling of the present invention
m>=280MPa, R
p0.2>=210MPa, A
50>=6%, meet the requirement of ASTMB90/B90M-07 standard.
Below by embodiment, technical scheme of the present invention is described in further detail.
The specific embodiment
Embodiment 1
Adopting the hot-rolling mill of 2800mm is 380mm to thickness, width is that the AZ31B magnesium alloy slab of 750mm carries out the inferior rolling of two fire, the system of described the first fire time rolling is: in breaking down temperature, be repeat-rolling 16 passages under the condition of 500 ℃, the pass deformation rate of controlled rolling is followed successively by 10%, 30%, 35%, 30%, 25%, 20%, 20%, 15%, 10%, 10%, 10%, 10%, 10%, 10%, 10% and 10%, and total reduction is 95%; The system of described the second fire time rolling is: in breaking down temperature, be repeat-rolling 4 passages under the condition of 460 ℃, the finishing temperature of controlled rolling is 220 ℃, and pass deformation rate is followed successively by 15%, 45%, 25% and 15%, and total reduction is 70%; Finally obtain surface quality good, thickness is 5.7mm, the AZ31B magnesium alloy wide-width thin plate that width is 1200mm, and sheet material unevenness≤5mm/m, lumber recovery is 85%.
The present embodiment utilizes large-scale hot-rolling machine AZ31B magnesium alloy slab to be carried out to the rolling of large deformation, by two fire time rollings, make the crystal grain of magnesium alloy fully broken, by temperature-controlled rolling, improve plate property, finally obtain that surface quality is good, plate shape is good, lumber recovery is high, the AZ31B magnesium alloy wide-width thin plate of excellent performance, filled up the blank of home products, the room-temperature mechanical property R of the AZ31B magnesium alloy wide-width thin plate of rolling
m300MPa, R
p0.2225MPa, A
508%, meet ASTMB90/B90M-07 standard-required.
Embodiment 2
Adopting the hot-rolling mill of 2800mm is 100mm to thickness, width is that the AZ31B magnesium alloy slab of 2600mm carries out the inferior rolling of two fire, the system of described the first fire time rolling is: in breaking down temperature, be repeat-rolling 6 passages under the condition of 460 ℃, the pass deformation rate of controlled rolling is followed successively by 10%, 20%, 37%, 20%, 10% and 10%, and total reduction is 70%; The system of described the second fire time rolling is: in breaking down temperature, be repeat-rolling 6 passages under the condition of 430 ℃, the finishing temperature of controlled rolling is 235 ℃, and pass deformation rate is 30%, 45%, 40%, 23%, 20% and 10%, and total reduction is 87%; Finally obtain surface quality good, thickness is 4mm, the AZ31B magnesium alloy wide-width thin plate that width is 2600mm, and sheet material unevenness≤5mm/m, lumber recovery is 88%.
The present embodiment utilizes large-scale hot-rolling machine AZ31B magnesium alloy slab to be carried out to the rolling of large deformation, by two fire time rollings, make the crystal grain of magnesium alloy fully broken, by temperature-controlled rolling, improve plate property, finally obtain that surface quality is good, plate shape is good, lumber recovery is high, the AZ31B magnesium alloy wide-width thin plate of excellent performance, filled up the blank of home products, the room-temperature mechanical property R of the AZ31B magnesium alloy wide-width thin plate of rolling
m310MPa, R
p0.2230MPa, A507%, meet ASTMB90/B90M-07 standard-required.
Embodiment 3
Adopting the hot-rolling mill of 2800mm is 30mm to thickness, width is that the AZ31B magnesium alloy slab of 1200mm carries out the inferior rolling of a fire, the system of rolling is: in breaking down temperature, be repeat-rolling 10 passages under the condition of 480 ℃, the finishing temperature of controlled rolling is 240 ℃, pass deformation rate is followed successively by 10%, 15%, 25%, 25%, 20%, 20%, 15%, 10%, 10% and 10%, and total reduction is 83%; Finally obtain surface quality good, thickness is 5mm, the AZ31B magnesium alloy wide-width thin plate that width is 1200mm, and sheet material unevenness≤5mm/m, lumber recovery is 90%.
The present embodiment utilizes large-scale hot-rolling machine AZ31B magnesium alloy slab to be carried out to the rolling of large deformation, by a fire time rolling, make the crystal grain of magnesium alloy fully broken, by temperature-controlled rolling, improve plate property, finally obtain that surface quality is good, plate shape is good, lumber recovery is high, the AZ31B magnesium alloy wide-width thin plate of excellent performance, filled up the blank of home products, the room-temperature mechanical property R of the AZ31B magnesium alloy wide-width thin plate of rolling
m303MPa, R
p0.2228MPa, A
506.5%, meet ASTMB90/B90M-07 standard-required.
Embodiment 4
Adopting the hot-rolling mill of 2800mm is 60mm to thickness, width is that the AZ31B magnesium alloy slab of 2000mm carries out the inferior rolling of a fire, the system of rolling is: in breaking down temperature, be repeat-rolling 16 passages under the condition of 500 ℃, the finishing temperature of controlled rolling is 220 ℃, pass deformation rate is followed successively by 10%, 20%, 45%, 30%, 25%, 20%, 20%, 15%, 10%, 10%, 10%, 10%, 10%, 10%, 10% and 10%, and total reduction is 95%; Finally obtain surface quality good, thickness is 3mm, the AZ31B magnesium alloy wide-width thin plate that width is 2000mm, and sheet material unevenness≤5mm/m, lumber recovery is 87%.
The present embodiment utilizes large-scale hot-rolling machine AZ31B magnesium alloy slab to be carried out to the rolling of large deformation, by a fire time rolling, make the crystal grain of magnesium alloy fully broken, by temperature-controlled rolling, improve plate property, finally obtain that surface quality is good, plate shape is good, lumber recovery is high, the AZ31B magnesium alloy wide-width thin plate of excellent performance, filled up the blank of home products, the room-temperature mechanical property R of the AZ31B magnesium alloy wide-width thin plate of rolling
m310MPa, R
p0.2232MPa, A
508%, meet ASTMB90/B90M-07 standard-required.
Embodiment 5
Adopting the hot-rolling mill of 2800mm is 35mm to thickness, width is that the AZ31B magnesium alloy slab of 2600mm carries out the inferior rolling of a fire, the system of rolling is: in breaking down temperature, be repeat-rolling 8 passages under the condition of 480 ℃, the finishing temperature of controlled rolling is 230 ℃, pass deformation rate is followed successively by 10%, 20%, 25%, 25%, 20%, 20%, 15% and 10%, and total reduction is 80%; Finally obtain surface quality good, thickness is 7mm, the AZ31B magnesium alloy wide-width thin plate that width is 2600mm, and sheet material unevenness≤5mm/m, lumber recovery is 89%.
The present embodiment utilizes large-scale hot-rolling machine AZ31B magnesium alloy slab to be carried out to the rolling of large deformation, by a fire time rolling, make the crystal grain of magnesium alloy fully broken, by temperature-controlled rolling, improve plate property, finally obtain that surface quality is good, plate shape is good, lumber recovery is high, the AZ31B magnesium alloy wide-width thin plate of excellent performance, filled up the blank of home products, the room-temperature mechanical property R of the AZ31B magnesium alloy wide-width thin plate of rolling
m280MPa, R
p0.2210MPa, A
506%, meet ASTMB90/B90M-07 standard-required.
Embodiment 6
Adopting the hot-rolling mill of 2800mm is 380mm to thickness, width is that the AZ31B magnesium alloy slab of 2600mm carries out the inferior rolling of two fire, the system of described the first fire time rolling is: in breaking down temperature, be repeat-rolling 9 passages under the condition of 460 ℃, the pass deformation rate of controlled rolling is followed successively by 10%, 15%, 22%, 18%, 14%, 12%, 10%, 10% and 10%, and total reduction is 73%; The system of described the second fire time rolling is: in breaking down temperature, be repeat-rolling 8 passages under the condition of 400 ℃, the finishing temperature of controlled rolling is 240 ℃, pass deformation rate is followed successively by 40%, 45%, 45%, 42%, 40%, 30%, 20% and 15%, and total reduction is 97%; Finally obtain surface quality good, thickness is 3mm, the AZ31B magnesium alloy wide-width thin plate that width is 2600mm, and sheet material unevenness≤5mm/m, lumber recovery is 88%.
The present embodiment utilizes large-scale hot-rolling machine AZ31B magnesium alloy slab to be carried out to the rolling of large deformation, by two fire time rollings, make the crystal grain of magnesium alloy fully broken, by temperature-controlled rolling, improve plate property, finally obtain that surface quality is good, plate shape is good, lumber recovery is high, the AZ31B magnesium alloy wide-width thin plate of excellent performance, filled up the blank of home products, the room-temperature mechanical property R of the AZ31B magnesium alloy wide-width thin plate of rolling
m320MPa, R
p0.2220MPa, A
507%, meet ASTMB90/B90M-07 standard-required.
The above; it is only preferred embodiment of the present invention; not the present invention is done to any restriction, every any simple modification of above embodiment being done according to invention technical spirit, change and equivalent structure change, and all still belong in the protection domain of technical solution of the present invention.
Claims (1)
1. the rolling processing method of an AZ31B magnesium alloy wide-width thin plate, it is characterized in that, the method is: adopting the hot-rolling mill of 2800mm is 30mm～380mm to thickness, width is that the AZ31B magnesium alloy slab of 750mm～2600mm carries out the inferior rolling of 1～2 fire, obtaining thickness is 3mm～7mm, the AZ31B magnesium alloy wide-width thin plate that width is 1200mm～2600mm; The system of the first fire time rolling is: in breaking down temperature, be repeat-rolling 6～16 passages under the condition of 460 ℃～500 ℃, the pass deformation rate of controlled rolling is 10%～45%, and total reduction is 70%～95%; The system of the second fire time rolling is: in breaking down temperature, be repeat-rolling 4～8 passages under the condition of 400 ℃～460 ℃, the pass deformation rate of controlled rolling is 10%～45%, and total reduction is 70%～97%; When carrying out the inferior rolling of 1 fire, the finishing temperature of controlled rolling is 220 ℃～240 ℃; When carrying out the inferior rolling of 2 fire, the finishing temperature of controlling the second fire time rolling is 220 ℃～240 ℃.
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Citations (5)
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| CN1226443C (en) * | 2003-11-20 | 2005-11-09 | 洛阳铜加工集团有限责任公司 | Process for rolling deformation magnesium and magnesium alloy sheet material |
| CN1788926A (en) * | 2004-12-17 | 2006-06-21 | 长沙市美克科技开发有限公司 | Sheet rolling and heat treatment technology for magnesium alloy with thickness below millimeter |
| CN101422784A (en) * | 2007-11-01 | 2009-05-06 | 山西闻喜银光镁业（集团）有限责任公司 | Rolling technique of ultra-fine grained magnesium alloy sheet |
| CN101653778A (en) * | 2009-09-29 | 2010-02-24 | 哈尔滨工业大学 | Warm-rolling manufacture method for magnesium or magnesium alloy sheet |
| CN102416405A (en) * | 2011-09-29 | 2012-04-18 | 西部钛业有限责任公司 | Method for processing magnesium alloy wide-width medium-thick plate |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010043335A (en) * | 2008-08-16 | 2010-02-25 | Phifit Kk | Metal plate, magnesium alloy plate, and method and apparatus for manufacturing the same by rolling |
| JP5527498B2 (en) * | 2008-09-19 | 2014-06-18 | 公立大学法人大阪府立大学 | Magnesium alloy plate excellent in room temperature formability and processing method of magnesium alloy plate |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1226443C (en) * | 2003-11-20 | 2005-11-09 | 洛阳铜加工集团有限责任公司 | Process for rolling deformation magnesium and magnesium alloy sheet material |
| CN1788926A (en) * | 2004-12-17 | 2006-06-21 | 长沙市美克科技开发有限公司 | Sheet rolling and heat treatment technology for magnesium alloy with thickness below millimeter |
| CN101422784A (en) * | 2007-11-01 | 2009-05-06 | 山西闻喜银光镁业（集团）有限责任公司 | Rolling technique of ultra-fine grained magnesium alloy sheet |
| CN101653778A (en) * | 2009-09-29 | 2010-02-24 | 哈尔滨工业大学 | Warm-rolling manufacture method for magnesium or magnesium alloy sheet |
| CN102416405A (en) * | 2011-09-29 | 2012-04-18 | 西部钛业有限责任公司 | Method for processing magnesium alloy wide-width medium-thick plate |
Non-Patent Citations (2)
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| JP特開2010-43335A 2010.02.25 |
| JP特開2010-70821A 2010.04.02 |
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