CN107779795A - The double_stage guide heat riser and method of a kind of aluminium alloy thick plate - Google Patents
The double_stage guide heat riser and method of a kind of aluminium alloy thick plate Download PDFInfo
- Publication number
- CN107779795A CN107779795A CN201610775544.4A CN201610775544A CN107779795A CN 107779795 A CN107779795 A CN 107779795A CN 201610775544 A CN201610775544 A CN 201610775544A CN 107779795 A CN107779795 A CN 107779795A
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- Prior art keywords
- temperature
- burner hearth
- slab
- solid solubility
- aluminium alloy
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- 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
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0056—Furnaces through which the charge is moved in a horizontal straight path
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention discloses the double_stage guide heat riser and method of a kind of aluminium alloy thick plate, solution heat device is roller-hearth solution furnace, is divided into medium temperature solid solution burner hearth and high temperature solid solution burner hearth.First medium temperature solid solution burner hearth is heated to being far above first order solid solubility temperature, high temperature solid solution burner hearth is heated to be far above second level solid solubility temperature；Then aluminium alloy thick plate is put into medium temperature solid solution burner hearth, until slab temperature is warming up to first order solid solubility temperature, then fire box temperature is quickly down to the insulation of first order solid solubility temperature；Slab finally is transferred into high temperature solid solution burner hearth to continue to heat up, when slab temperature is warming up to two level solid solubility temperature, fire box temperature is reduced to the insulation of two level solid solubility temperature.Aluminium alloy thick plate temperature fast and efficiently can be heated to solid solubility temperature by the present invention, reduce heat treatment time, improve production efficiency, while can avoid the performance loss caused by long-time heating.The process is easy to operate, cost-effective, has actual industrial production application value.
Description
Technical field
The present invention relates to a kind of heat treatment method of aluminium alloy thick plate, belongs to nonferrous materials and its hot-working field.
Background technology
Aluminium alloy thick plate is because it is in the comprehensive advantage of manufacturing cost, structure loss of weight and formability etc., in aviation, boat
My god, be widely used in the important lightweight overall structure such as navigation and communications and transportation.Industrial aluminium alloy plate is generally dissolved
Can enhanced type aluminium alloy, it is necessary to by being dissolved, quenching, the solid solution craft such as timeliness obtain high intensity, high tenacity and decay resistance.
For aluminium alloy thick plate, double_stage guide solid solution system can separate out Al in advance in the solid solution stage3Zr particles, it can effectively suppress to tie again
Crystalline substance, to improve its mechanical property.Existing double_stage guide temperature-rising method does not consider the heating hesitation of big slab typically, directly will
Furnace gas temperature is warming up to target solid solubility temperature, and now, aluminium alloy thick plate temperature will be far below target solid solubility temperature, is unable to reach double
The effect of level solid solution.And this programming rate is excessively slow, to reach solid solubility temperature, it is necessary to can significantly extend the heating-up time, reduce
Production efficiency.Meanwhile long-time heat preservation may cause grain structure to grow up at high temperature, material property is reduced.
Structural member manufactured by high-performance aluminium alloy slab is the important light weight such as Aeronautics and Astronautics, navigation and communications and transportation
Change integrally-built key position, its performance and uniformity govern such component load-bearing ability and safety of being on active service.With current
The development of such aluminium alloy structure tends to big specification integration and high combination property, the solid solution work to large-size aluminum alloy slab
Skill proposes new challenge.Double_stage guide method can effectively improve the mechanical property of aluminium alloy thick plate.Therefore, a kind of essence of invention
Really this solid solution system effectively can be applied to industrial production by the double_stage guide method of being rapidly heated of control aluminium alloy thick plate temperature,
Be of great practical significance.
The content of the invention
A kind of the fast of accurate control aluminium alloy thick plate temperature is provided it is an object of the invention to overcome prior art deficiency
Fast temperature-rising method.
The purpose of the present invention is realized by the following method：The double_stage guide heat riser and method of a kind of aluminium alloy thick plate,
Characterized in that, solution heat device is roller-hearth solution furnace, it is divided into two parts of medium temperature solid solution burner hearth and high temperature solid solution burner hearth,
Medium temperature solid solution burner hearth is heated to first higher than the first order solid solubility temperature 20-300 °C, high temperature solid solution burner hearth is heated to than the
Two level solid solubility temperature is high 20-200 °C；Then aluminium alloy thick plate is put into medium temperature solid solution burner hearth, until slab temperature is warming up to the
One-level solid solubility temperature, then fire box temperature is quickly down to the insulation of first order solid solubility temperature；Slab is finally transferred to high temperature solid solution
Burner hearth continues to heat up, and when slab temperature is warming up to two level solid solubility temperature, fire box temperature is reduced to the insulation of two level solid solubility temperature；
Slab reaches the time of the first order and second level solid solubility temperature by formula：It is determined that in formula,T f
For furnace gas temperature,T 0 For slab initial temperature,TFor solid solubility temperature,AIt is 9.8 × 10 for constant value-6-1.0×10-3,t
Reach the time of solid solubility temperature for slab.
Methods described, the thickness of described aluminium alloy thick plate is 4-650mm.
Methods described, the heat-treatment temperature range of described aluminium alloy thick plate is 300-550 DEG C.
The present invention has considered below in technological design：In slab temperature-rise period, furnace gas and slab remain very
The big temperature difference, it is ensured that slab is all the time in the state that is rapidly heated；Slab directly can accurately be calculated using formula and reach solid solution
The time of temperature, fast cooling now is carried out to furnace gas, can effectively place slab burning；Slab is dissolved in burner hearth at two
OK, it can remain that fire box temperature is in same temperature section, the thermal loss of burner hearth heating and cooling can be reduced, while greatly improve
Production efficiency.
The invention has the advantages that：1. furnace gas temperature is far above solid solubility temperature, the programming rate of slab can be effectively improved.It is 2. thick
When plate is warming up to target solid solubility temperature soon, still there is the temperature difference in furnace gas and slab, and plate temperature can be made to be quickly ramped up to target temperature.3. stove
In the gas fast cooling stage, furnace gas temperature can be made to be reduced to solid solubility temperature, slab burning can be prevented.4. because the heating-up time significantly subtracts
Few, material grains caused by the heating-up time can be prevented long are grown up, and can effectively improve component performance.5. double_stage guide processing exists
Carried out in two burner hearths, heating and cooling time and thermal loss can be reduced, greatly improved production capacity and production efficiency, reduce cost.
6. the process is easy to operate, there is actual industrial production application value.
Brief description of the drawings
Fig. 1 is the furnace gas of Processing Example 1 of the present invention and the temperature-rise period of slab.Fig. 2 is not using present invention processing pair
The furnace gas of ratio 1 and the temperature-rise period of slab.Fig. 3 is the furnace gas of Processing Example 2 of the present invention and the temperature-rise period of slab.Fig. 4
It is not using the furnace gas of present invention processing comparative example 2 and the temperature-rise period of slab.Fig. 5 is present invention process schematic diagram.
Embodiment
The present invention is intended to further illustrate with reference to embodiments, is not intended to limit the present invention.
Embodiment
Aluminium alloy thick plate material is 7085 aluminium alloys, and size is：3000×1200×180mm.Slab is placed in two
Double_stage guide processing (300 DEG C/30min+480 DEG C/30min) is carried out in the roller hearth type heating furnace of individual burner hearth：TakeABe worth for 2.2 ×
10-4, calculated according to formula, be first dissolved in the medium temperature that furnace gas temperature is 450 DEG C in burner hearth and be incubated 70min, then fast cooling is to 300
DEG C, it is incubated 30min；Then fast transfer to the high-temperature burner hearth that furnace gas temperature is 570 DEG C is incubated 46min, then fast cooling is to 480
DEG C, it is incubated 30min.The temperature-rise period of furnace gas and slab, is shown in Fig. 3.
Comparative example 1
Aluminium alloy thick plate material is 7085 aluminium alloys, and size is：3000×1200×180mm.Slab is placed in an only stove
Double_stage guide processing (300 DEG C/30min+480 DEG C/30min) is carried out in the roller hearth type heating furnace of thorax：Furnace gas is first warming up to 452
DEG C, then fast cooling is to 300 DEG C, is incubated 30min；570 DEG C are warming up to, then fast cooling is incubated 30min to 480 DEG C.Furnace gas and
The temperature-rise period of slab, is shown in Fig. 2.
Comparative example 2
Aluminium alloy thick plate material is 7085 aluminium alloys, and size is：3000×1200×180mm.Slab is placed in an only stove
Double_stage guide processing (300 DEG C/30min+480 DEG C/30min) is carried out in the roller hearth type heating furnace of thorax：Furnace gas is first warming up to 300
DEG C, it is incubated 30min；480 DEG C are warming up to again, are incubated 30min.The temperature-rise period of furnace gas and slab, is shown in Fig. 3.
Claims (3)
1. the double_stage guide heat riser and method of a kind of aluminium alloy thick plate, it is characterised in that solution heat device is roller-bottom type
Solid solution furnace, it is divided into two parts of medium temperature solid solution burner hearth and high temperature solid solution burner hearth, medium temperature solid solution burner hearth is heated to than first first
Level solid solubility temperature is high 20-300 °C, and high temperature solid solution burner hearth is heated to higher than the second level solid solubility temperature 20-200 °C；Then will
Aluminium alloy thick plate is put into medium temperature solid solution burner hearth, until slab temperature is warming up to first order solid solubility temperature, then fire box temperature is quick
It is down to the insulation of first order solid solubility temperature；Slab finally is transferred into high temperature solid solution burner hearth to continue to heat up, when slab temperature is warming up to
During two level solid solubility temperature, fire box temperature is reduced to the insulation of two level solid solubility temperature；Slab reaches the first order and second level solid solution temperature
The time of degree is by formula：It is determined that in formula,T f For furnace gas temperature,T 0 For slab initial temperature,T
For solid solubility temperature,AIt is 9.8 × 10 for constant value-6-1.0×10-3,tReach the time of solid solubility temperature for slab.
2. according to the method for claim 1, it is characterised in that the thickness of the aluminium alloy thick plate is 4-650mm.
3. according to the method for claim 1, it is characterised in that the solid solubility temperature scope of the aluminium alloy thick plate is 300-
550℃。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610775544.4A CN107779795A (en) | 2016-08-31 | 2016-08-31 | The double_stage guide heat riser and method of a kind of aluminium alloy thick plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610775544.4A CN107779795A (en) | 2016-08-31 | 2016-08-31 | The double_stage guide heat riser and method of a kind of aluminium alloy thick plate |
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| Publication Number | Publication Date |
|---|---|
| CN107779795A true CN107779795A (en) | 2018-03-09 |
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| CN201610775544.4A Pending CN107779795A (en) | 2016-08-31 | 2016-08-31 | The double_stage guide heat riser and method of a kind of aluminium alloy thick plate |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1600466A (en) * | 2004-10-14 | 2005-03-30 | 北京科技大学 | Method for preparing block of nano aluminum alloy in ultrahigh strength |
| CN102936708A (en) * | 2012-11-23 | 2013-02-20 | 江苏常铝铝业股份有限公司 | Aluminum alloy material temperature difference proportion annealing technique |
-
2016
- 2016-08-31 CN CN201610775544.4A patent/CN107779795A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1600466A (en) * | 2004-10-14 | 2005-03-30 | 北京科技大学 | Method for preparing block of nano aluminum alloy in ultrahigh strength |
| CN102936708A (en) * | 2012-11-23 | 2013-02-20 | 江苏常铝铝业股份有限公司 | Aluminum alloy material temperature difference proportion annealing technique |
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Application publication date: 20180309 |
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