CN104233136A - Production process for obtaining copper alloy strip with uniform and small grains - Google Patents
Production process for obtaining copper alloy strip with uniform and small grains Download PDFInfo
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- CN104233136A CN104233136A CN201410475954.8A CN201410475954A CN104233136A CN 104233136 A CN104233136 A CN 104233136A CN 201410475954 A CN201410475954 A CN 201410475954A CN 104233136 A CN104233136 A CN 104233136A
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Abstract
The invention discloses a production process for obtaining a copper alloy strip with uniform and small grains, and belongs to the metal machining industry. According to the process, an alloy ingot is subjected to hot rolling after high-temperature heating to obtain a slab, the slab is subjected to intermediate annealing, technological parameters of a heating section, a thermal insulation section and a cooling section are controlled in the annealing process, and the copper alloy strip with the uniform and small grains is obtained. The production process is simple and has the greatest characteristic that the copper strip with the uniform and small grains can be obtained on the basis of conventional equipment, thereby having excellent popularization and application values.
Description
Technical field
The present invention relates to a kind of preparation technology of sheet brass band, especially obtain even, small grains copper alloy plate strip production technique, belong to metal-working industry.
Background technology
Along with the continuous expansion of copper alloy products range of application, propose more and more higher performance requriements to the performance of copper alloy band, the general working rate general control of brass alloys is at 60-70%.And in current suitability for industrialized production, have bell-type annealing and continous way annealing two large classes.There is annealing volume heart portion and outside temperature inequality in bell type annealing furnace, performance difference is comparatively large, very easily causes the defects such as surfaces stick when annealing temperature is higher, and the material volume of stepping back easily occurs that crystal grain is uneven.
Simultaneously grain refining can improve one of most effectual way of the strength of materials and toughness, splits viscous deformation to prepare small grains material at present mainly through plays such as microalloying means and high pressure torsions.More than manufacture forwarding method cost is high, technique is loaded down with trivial details, in existing scale production condition, be difficult to realization.
Summary of the invention
Technical assignment of the present invention be for above-mentioned deficiency of the prior art provide a kind of preparation that technique is simple in existing scale production Equipment Foundations, production cost is low, can accomplish scale production evenly, the preparation method of small grains copper alloy plate strip.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of acquisition is even, small grains copper alloy plate strip production technique, copper alloy casting ingot is carried out hot rolling after heat, obtains slab; Through milling face and normal temperature cold rolling and intermediate annealing step, in annealing process, control the processing parameter of heating zone, holding-zone and cooling section, obtain evenly, small grains copper plate/strip.
Preferably, its production technique specifically comprises the following steps:
The first step: heating hot rolling: copper alloy casting ingot is carried out hot rolling water-cooled at 780-850 DEG C, and finishing temperature is 350-550 DEG C, and total deformation is 80-96%, obtains 14-25mm red copper strand;
Second step: milling face and normal temperature cold rolling: the strand that the first step obtains is carried out milling, and milling amount is one side 0.5-1.0mm; Carry out cold rolling behind milling face, total deformation is 80-90%;
3rd step: recrystallization annealing: second step is obtained band and carry out recrystallization annealing at bell-type annealing furnace, point heating zone, holding-zone and cooling section in annealing process; Carrying out programming to cover annealing program makes wherein heating zone be divided into three steps, and the first step is heated to 400-450 DEG C, temperature rise rate >=120 DEG C/h, second step insulation 0.5-1 hour, 3rd step is heated to 450-520 DEG C, temperature rise rate 90 DEG C/h, and holding-zone is insulation 4.5 hours; Cooling section is less than 70 DEG C through air-cooled, water-cooled band tapping temperature;
4th step: the cold rolling and air-cushion type anneal of normal temperature: the band that the 3rd step obtains is carried out total deformation be the normal temperature of 50-70% cold rolling after, anneal at air-cushion type annealing furnace, annealing temperature: 650-700 DEG C, annealing time 9-50 second; The final air cushion furnace annealing of rolling through several rolling process obtains evenly, small grains copper alloy plate strip.
Described " evenly, small grains " refers to that grain-size is refine to (10.0 ± 0.5) μm by (25.0 ± 0.5) μm under traditional technology.
The cold rolling operation of rolling referred to below metal recrystallization temperature in described second step.
Preferably, in described 3rd step heating zone, the first step is heated to 400-430 DEG C, and temperature rise rate >=120 DEG C/h, second step is incubated 0.5 hour, and the 3rd step is heated to 450-480 DEG C, temperature rise rate 90 DEG C/h.
Preferably, the step of finishing process is also comprised after the 4th step:
The band that 4th step obtains is carried out cleaning, stretch-bending straightening, slitting finishing process obtain good surface, template quality.
Preferably, described copper alloy is brass alloys.
Production technique of the present invention is simple, the basis that maximum feature can be implemented in existing installation obtains the close grain copper plate/strip of uniformity, thus has good application value.
One of the present invention obtains evenly, small grains copper alloy plate strip production technique has to overcome performance difference in the problems referred to above larger, easily occur that crystal grain is uneven, the type of heating of its uniqueness, multistage path and flexile process parameter control can be realized, for cold rolling-annealing product provides the feature having more brand-new structure property solution.Not traditional process optimization, but inherently affect recovery and recrystallization and Grain Growth Mechanism.Compared with prior art, there is following outstanding beneficial effect:
1, grain-size obtains refinement and the grain size distribution difference of two squares reduces greatly, and that is even grain size improves greatly.
2, present invention process is simple, and existing installation can be utilized directly to put into production, and production cost is low, easily accomplishes scale production, and has good industrial prospect.
3, the present invention is by large working modulus, and low-carbon steel technology, because of the type of heating of its uniqueness, can realize multistage path and flexile process parameter control, and in annealing process, heating rate raises, the recrystal grain that refinement is final.Compared with original production technique, its intensity and extension property all have raising in various degree, can obvious crystal grain thinning.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Fig. 1 is that a kind of acquisition is even, small grains copper alloy plate strip production technique annealing curve schematic diagram;
Fig. 2 is former annealing process metallograph;
Fig. 3 is annealing process metallograph of the present invention.
Embodiment
Below by the embodiments of the invention described with reference to embodiment, embodiment only for explaining the present invention, and can not be interpreted as limitation of the present invention.
As shown in Figure 1, 2, 3, a kind of 650 obtain even, small grains copper alloy plate strip production technique, and the brass alloys ingot casting of cupric 65% is heated to 830 DEG C, carry out hot rolling, then water-cooled, it is thick that ingot casting thickness is that 290mm is rolled down to 16mm, and obtaining total deformation is 94.5%.Finishing temperature is not less than 500 DEG C and obtains the thick slab of 16mm, and then carrying out milling face one side milling amount is 0.6mm, and large working modulus is cold rolling, and cold rolling is the operation of rolling below metal recrystallization temperature, and it is 86.4% that cogging controls total deformation, obtains the 2.0mm roll coil of strip.Carry out recrystallization annealing to the roll coil of strip, adopt the first step to be heated to 430 DEG C, temperature rise rate >=120 DEG C/h, second step was 430 DEG C of insulations 0.5 hour, and the 3rd step is heated to 500 DEG C, temperature rise rate 90 DEG C/h.Holding-zone is insulation 4.5 hours.Cooling section is less than 70 DEG C through air-cooled, water-cooled band tapping temperature.Annealing through two rolling process rollings and air cushion furnace finally obtains even compact grained copper alloy plate strip.Then the band of acquisition is carried out cleaning, stretch-bending straightening, slitting finishing process obtain good surface, template quality.Fig. 2, Fig. 3 are shown in the contrast of former annealing process and this invention annealing process grain fineness number, and grain-size is refine to (10.0 ± 0.5) μm by (25.0 ± 0.5) μm under traditional technology, and grain-size is more even.
Fig. 2 production technique is: general working rate general control at 60-70%, control in annealing process heating zone be direct heating to 500 DEG C, temperature rise rate 90 DEG C/h, temperature rise rate is slow, lack second step 430 DEG C of insulations 0.5 hour compared with novel process.
Except the technical characteristic described in specification sheets, be the known technology of those skilled in the art.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (5)
1. obtain even, a small grains copper alloy plate strip production technique, it is characterized in that, copper alloy casting ingot is carried out hot rolling after heat, obtains slab; Through milling face and normal temperature cold rolling and intermediate annealing step, in annealing process, control the processing parameter of heating zone, holding-zone and cooling section, obtain evenly, small grains copper plate/strip.
2. the production technique according to claim, is characterized in that, comprises the following steps:
The first step: heating hot rolling: copper alloy casting ingot is carried out hot rolling water-cooled at 780-850 DEG C, and finishing temperature is 350-550 DEG C, and total deformation is 80-96%, obtains 14-25mm red copper strand;
Second step: milling face and normal temperature cold rolling: the strand that the first step obtains is carried out milling, and milling amount is one side 0.5-1.0mm; Carry out cold rolling behind milling face, total deformation is 80-90%;
3rd step: recrystallization annealing: second step is obtained band and carry out recrystallization annealing at bell-type annealing furnace, point heating zone, holding-zone and cooling section in annealing process; Carrying out programming to cover annealing program makes wherein heating zone be divided into three steps, and the first step is heated to 400-450 DEG C, temperature rise rate >=120 DEG C/h, second step insulation 0.5-1 hour, 3rd step is heated to 450-520 DEG C, temperature rise rate 90 DEG C/h, and holding-zone is insulation 4.5 hours; Cooling section is less than 70 DEG C through air-cooled, water-cooled band tapping temperature;
4th step: the cold rolling and air-cushion type anneal of normal temperature: the band that the 3rd step obtains is carried out total deformation be the normal temperature of 50-70% cold rolling after, anneal at air-cushion type annealing furnace, annealing temperature: 650-700 DEG C, annealing time 9-50 second; The final air cushion furnace annealing of rolling through several rolling process obtains evenly, small grains copper alloy plate strip.
3. production technique according to claim 2, is characterized in that, in described 3rd step heating zone, the first step is heated to 400-430 DEG C, and temperature rise rate >=120 DEG C/h, second step is incubated 0.5 hour, and the 3rd step is heated to 450-480 DEG C, temperature rise rate 90 DEG C/h.
4. production technique according to claim 2, is characterized in that, also comprises the step of finishing process after the 4th step:
The band that 4th step obtains is carried out cleaning, stretch-bending straightening, slitting finishing process obtain good surface, template quality.
5. production technique according to claim 2, is characterized in that, described copper alloy is brass alloys.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106001160A (en) * | 2016-08-05 | 2016-10-12 | 徐高磊 | Production technology of high-purity and high-conductivity oxygen-free copper strips |
| CN106048300A (en) * | 2016-06-21 | 2016-10-26 | 中色奥博特铜铝业有限公司 | Nickel brass strip and manufacturing method thereof |
| CN106086496A (en) * | 2016-06-16 | 2016-11-09 | 清远楚江铜业有限公司 | Preparation method of environment-friendly copper alloy strip |
| CN110938787A (en) * | 2019-12-24 | 2020-03-31 | 中铝华中铜业有限公司 | Air cushion type continuous annealing process |
| CN110964897A (en) * | 2019-12-31 | 2020-04-07 | 无锡隆达金属材料有限公司 | Annealing method for obtaining uniform mechanical property of HAl77-2 aluminum brass tube |
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| CN1654690A (en) * | 2004-02-13 | 2005-08-17 | 上海金泰铜业有限公司 | Copper alloy material for integrated circuit lead frame and manufacturing process thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086496A (en) * | 2016-06-16 | 2016-11-09 | 清远楚江铜业有限公司 | Preparation method of environment-friendly copper alloy strip |
| CN106086496B (en) * | 2016-06-16 | 2017-12-19 | 清远楚江铜业有限公司 | Preparation method of environment-friendly copper alloy strip |
| CN106048300A (en) * | 2016-06-21 | 2016-10-26 | 中色奥博特铜铝业有限公司 | Nickel brass strip and manufacturing method thereof |
| CN106001160A (en) * | 2016-08-05 | 2016-10-12 | 徐高磊 | Production technology of high-purity and high-conductivity oxygen-free copper strips |
| CN106001160B (en) * | 2016-08-05 | 2018-01-02 | 温州市日电电器有限公司 | A kind of high-purity high production technology led with oxygen-free copper stripe |
| CN110938787A (en) * | 2019-12-24 | 2020-03-31 | 中铝华中铜业有限公司 | Air cushion type continuous annealing process |
| CN110964897A (en) * | 2019-12-31 | 2020-04-07 | 无锡隆达金属材料有限公司 | Annealing method for obtaining uniform mechanical property of HAl77-2 aluminum brass tube |
| CN110964897B (en) * | 2019-12-31 | 2021-10-01 | 江苏隆达超合金股份有限公司 | Annealing method for obtaining uniform mechanical property of HAl77-2 aluminum brass tube |
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Application publication date: 20141224 |