CN102189120A - Supplementary heating method for low plastic metal plate band - Google Patents
Supplementary heating method for low plastic metal plate band Download PDFInfo
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- CN102189120A CN102189120A CN2010101239026A CN201010123902A CN102189120A CN 102189120 A CN102189120 A CN 102189120A CN 2010101239026 A CN2010101239026 A CN 2010101239026A CN 201010123902 A CN201010123902 A CN 201010123902A CN 102189120 A CN102189120 A CN 102189120A
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Abstract
The invention discloses a supplementary heating method for a low plastic metal plate band. The method comprises the following steps of: setting a working temperature of an air heating furnace according to a proper temperature under a recrystallization temperature of low plastic metal; generating furnace gas with uniform temperature and high-speed flow under the stirring of a heat resisting exhauster; and continuously tolerating and sweeping the low plastic metal so that the low plastic metal is subjected to the uniform supplementary heating. The invention eliminates the defects such as structure segregation of rolled metal, processing stress and the like, improves the plasticity of the rolled metal in order to facilitate the deep processing of the rolled metal, and increases the lumber recovery and the production efficiency.
Description
Technical field
The present invention relates to a kind of inductile metal plate and belt and replenish process in the temperature of rolling centre, specifically after a rolling process, the intermediate of inductile metal plate and belt that is rolled into volume is in hot-blast stove, with the uniform swiftly flowing hot furnace gas of temperature, contain purging inductile metal plate and belt continuously, thereby make the inductile metal plate and belt below recrystallization temperature, obtain replenishing uniformly the method for heating.
Background technology
In the operation of rolling of metal material, usually there are defectives such as remaining machining stress, uneven components, microstructure segregation, have a strong impact on the processing performance and the serviceability of metal material, as work hardening, defective such as plasticity is low.Eliminate or reduce these defectives, improve processing performance and serviceability and must anneal.So-called annealing is heated to a certain warm area more than the recrystallization temperature to workpiece exactly, keeps certain hour, the technical process of cooling off with a certain speed.Temperature is one of most important technological parameter in the metal rolled process of inductile such as magnesium, because magnesium elements is intensive hexahedron lattice structure, so rolling at normal temperatures very difficult, fracture and limit portion cracking have a strong impact on product quality in the middle of very easily taking place.
General inductile metal such as magnesium all have higher thermal conductivity factor and lower thermal capacity, and therefore temperature of articles decline is very fast in conveying, the operation of rolling, and finishing temperature is crossed the low goods percentage elongation that can cause and reduced, the permission drafts is little, production efficiency is low, is prone to crackle, and lumber recovery is low; The too high lattice that easily makes of finishing temperature is grown up, and causes the hot-short tendency increase of goods, intensity decline, oxidization burning loss to increase, and influences product quality.
Summary of the invention
In order to address the above problem, the invention provides a kind of inductile metal plate and belt and replenish heating method, material difference according to the inductile metallic article, the a certain temperature range that the recrystallization temperature that replenishing heats is set in this material is following both can improve the plasticity of metal, increased reduction in pass, can avoid occurring the oxidization burning loss of product surface crackle and metal again, and lattice grows up and causes red brittleness, and intensity descends, and improves the quality and the production efficiency of product.
The present invention specifically comprises following step:
A. in casting of inductile metal plate and belt or warm-rolling process, liquid inductile metal casting rolling or inductile metallic coil after the intermediate through the warm-rolling rolling, are delivered to supplementary heating in the hot-blast stove while hot;
B. gas medium in the hot-blast stove is heated in the setting range under the recrystallization temperature of inductile metal, under the stirring of blower fan, produces swiftly flowing hot furnace gas, contain continuously and purge the inductile metal plate and belt, make the inductile metal plate and belt obtain hot blast and mend temperature;
C. the inductile metal is evenly heated under the even containing of high speed hot blast, heating back warm-rolling rolling;
D. the intermediate after the warm-rolling rolling has been eliminated the work hardening in the inductile metal after hot blast is mended temperature, increases its plasticity, continues the warm-rolling rolling, puts into hot-blast stove again and proceeds above-mentioned PROCESS FOR TREATMENT;
E. above-mentioned processing step circulation repeats, and until rolling into final finished, enters subsequent processing at last.
At the inductile metal of unlike material, the following temperature range of the recrystallization temperature that is heated to different gas mediums is also different in the above-mentioned steps.
Beneficial effect of the present invention is: the middle supplementary heating difficult problem of the metal material that solved poor, the rolling difficulty of plasticity under all normal temperature, very easily ftractures, be set in certain interval temperature under the recrystallization temperature by hot-blast stove, evenly replenish and heat, eliminated the defective such as microstructure segregation, machining stress of metal material, the plasticity that improves stocking is beneficial to deep processing, improves lumber recovery and production efficiency simultaneously.
Description of drawings
Fig. 1 is a work flow schematic diagram of the present invention.
The specific embodiment
Be illustrated in figure 1 as work flow schematic diagram of the present invention, comprise following step::
A. in casting of inductile metal plate and belt or warm-rolling process, after the intermediate 4 after liquid inductile metal casting rolling 1 or the inductile metallic coil process warm-rolling rolling 3, deliver to supplementary heating in the hot-blast stove while hot;
B. gas medium in the hot-blast stove is heated in the setting range under the recrystallization temperature of inductile metal, under the stirring of blower fan, produces swiftly flowing hot furnace gas, contain continuously and purge the inductile metal plate and belt, make the inductile metal plate and belt obtain hot blast and mend temperature 2;
C. the inductile metal is evenly heated under the even containing of high speed hot blast, heating back warm-rolling rolling 3;
D. the intermediate 4 after the warm-rolling rolling 3 has been eliminated the work hardening in the inductile metal after hot blast is mended temperature, increases its plasticity, continues the warm-rolling rolling, puts into hot-blast stove again and proceeds above-mentioned PROCESS FOR TREATMENT;
E. above-mentioned processing step circulation repeats, and until rolling into final finished 5, enters subsequent processing 6 at last.
In the above-mentioned steps at the inductile metal of unlike material, temperature range below the recrystallization temperature that is heated to different gas mediums is also different, after becoming 3-10mm thickness volume base as the AZ31 magnesium alloy by liquid casting, deliver to while hot to replenish in the hot-blast stove and heat, hot blast temperature 220-380 ℃, temperature accuracy ± 5 ℃, in hot-blast stove supplementary heating 1.5-4 hour continuously, eliminate microstructure segregation and casting stress in the metal material, improve the plasticity of stocking, so that carry out warm-rolling; And for example the AZ31 magnesium alloy is become in the process of roll bending by casting volume base warm-rolling, whenever finish a rolling passage, all to deliver to the band that warm-rolling batches rolling while hot and carry out supplementary heating in the hot-blast stove, hot blast temperature 200-350 ℃, temperature accuracy ± 5 ℃, in stove, heated 1.0-4 hour continuously, eliminate the work hardening in the metal material, improve the plasticity of stocking, so that continue warm-rolling, so for different metal materials, its recrystallization temperature of setting in hot-blast stove is interval different.
Basic principle of the present invention, principal character and advantage of the present invention have more than been described.As usual; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present invention; under the prerequisite that does not break away from core technology of the present invention and processing range; attached technological parameter of the present invention also needs respective change because of the variation of the inductile metal material trade mark, and these variations all belong to protection scope of the present invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (2)
1. an inductile metal plate and belt replenishes heating method, it is characterized in that, comprises following step:
A. in casting of inductile metal plate and belt or warm-rolling process, after the intermediate after liquid inductile metal casting rolling or the inductile metallic coil process warm-rolling rolling, deliver to supplementary heating in the hot-blast stove while hot;
B. gas medium in the hot-blast stove is heated in the setting range under the recrystallization temperature of inductile metal, under the stirring of blower fan, produces swiftly flowing hot furnace gas, contain continuously and purge the inductile metal plate and belt, make the inductile metal plate and belt obtain hot blast and mend temperature;
C. the inductile metal is evenly heated under the even containing of high speed hot blast, heating back warm-rolling rolling;
D. the intermediate after the warm-rolling rolling has been eliminated the work hardening in the inductile metal after hot blast is mended temperature, increases its plasticity, continues the warm-rolling rolling, puts into hot-blast stove again and proceeds above-mentioned PROCESS FOR TREATMENT;
E. above-mentioned processing step circulation repeats, and until rolling into final finished, enters subsequent processing at last.
2. inductile metal plate and belt as claimed in claim 1 replenishes heating method, it is characterized in that, at the inductile metal of unlike material, the following temperature range of the recrystallization temperature that is heated to different gas mediums is also different in the above-mentioned steps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101239026A CN102189120A (en) | 2010-03-12 | 2010-03-12 | Supplementary heating method for low plastic metal plate band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101239026A CN102189120A (en) | 2010-03-12 | 2010-03-12 | Supplementary heating method for low plastic metal plate band |
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| Publication Number | Publication Date |
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| CN102189120A true CN102189120A (en) | 2011-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010101239026A Pending CN102189120A (en) | 2010-03-12 | 2010-03-12 | Supplementary heating method for low plastic metal plate band |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105728462A (en) * | 2016-04-01 | 2016-07-06 | 苏州大学 | Ultrasonic cast-rolling method for magnesium alloy slab |
| CN105855490A (en) * | 2016-04-01 | 2016-08-17 | 苏州大学 | Novel ultrasonic casting and rolling machine for preparing magnesium alloy plate blank |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1544683A (en) * | 2003-11-20 | 2004-11-10 | 洛阳铜加工集团有限责任公司 | Process for rolling deformation magnesium and magnesium alloy sheet material |
| CN1749428A (en) * | 2005-09-09 | 2006-03-22 | 洛阳铜加工集团有限责任公司 | Method for processing specific shape-changing magnesium and magnesium alloy plate strip |
| JP2006144043A (en) * | 2004-11-17 | 2006-06-08 | Mitsubishi Alum Co Ltd | Method for producing magnesium alloy sheet having excellent press moldability |
| CN1884896A (en) * | 2006-07-10 | 2006-12-27 | 东北大学 | Method for preparing 300MPa grade and isotropous AZ31 magnesium alloy sheet |
| JP2008163361A (en) * | 2006-12-27 | 2008-07-17 | Mitsubishi Alum Co Ltd | Method for producing magnesium alloy thin sheet having uniformly fine crystal grain |
| 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 |
-
2010
- 2010-03-12 CN CN2010101239026A patent/CN102189120A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1544683A (en) * | 2003-11-20 | 2004-11-10 | 洛阳铜加工集团有限责任公司 | Process for rolling deformation magnesium and magnesium alloy sheet material |
| JP2006144043A (en) * | 2004-11-17 | 2006-06-08 | Mitsubishi Alum Co Ltd | Method for producing magnesium alloy sheet having excellent press moldability |
| CN1749428A (en) * | 2005-09-09 | 2006-03-22 | 洛阳铜加工集团有限责任公司 | Method for processing specific shape-changing magnesium and magnesium alloy plate strip |
| CN1884896A (en) * | 2006-07-10 | 2006-12-27 | 东北大学 | Method for preparing 300MPa grade and isotropous AZ31 magnesium alloy sheet |
| JP2008163361A (en) * | 2006-12-27 | 2008-07-17 | Mitsubishi Alum Co Ltd | Method for producing magnesium alloy thin sheet having uniformly fine crystal grain |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 汪凌云: "《镁合金板材轧制工艺及组织性能分析》", 《稀有金属材料与工程》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105728462A (en) * | 2016-04-01 | 2016-07-06 | 苏州大学 | Ultrasonic cast-rolling method for magnesium alloy slab |
| CN105855490A (en) * | 2016-04-01 | 2016-08-17 | 苏州大学 | Novel ultrasonic casting and rolling machine for preparing magnesium alloy plate blank |
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Application publication date: 20110921 |