CN105177327A - Preparation method for high-magnesium aluminum alloy O-state plate of 5XXX series - Google Patents

Preparation method for high-magnesium aluminum alloy O-state plate of 5XXX series Download PDF

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Publication number
CN105177327A
CN105177327A CN201510498940.2A CN201510498940A CN105177327A CN 105177327 A CN105177327 A CN 105177327A CN 201510498940 A CN201510498940 A CN 201510498940A CN 105177327 A CN105177327 A CN 105177327A
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aluminum alloy
aluminium
refining
sawing
magnesium aluminum
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CN201510498940.2A
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Chinese (zh)
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赵启忠
何建贤
黄奎
赵解扬
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广西南南铝加工有限公司
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Publication of CN105177327A publication Critical patent/CN105177327A/en

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Abstract

The invention relates to a preparation method for a high-magnesium aluminum alloy O-state plate of 5XXX series. The method comprises the steps of smelting, refining, casting, soaking, saw cutting, surface milling, preheating, hot rolling, cross-cutting and uncoiling or edge trimming, saw cutting, packaging and warehousing and the like. According to the preparation method, the high-magnesium aluminum alloy O-state plate of the 5XXX series is prepared through a new production process, under the condition that the performance and structure stability of high-magnesium aluminum alloy are maintained, the production procedures can be reduced, and surface quality defects of the high-magnesium aluminum alloy can be reduced; products can be directly produced after the aluminum alloy plate with the thickness being equal to or larger than 3 mm is subjected to hot rolling, the product yield can be substantially increased, and production efficiency can be improved sufficiently.

Description

5XXX system high-magnesium aluminum alloy O state preparation of plates method

Technical field

The present invention relates to a kind of aluminium alloy manufacture field, be specifically related to a kind of 5XXX system high-magnesium aluminum alloy O state preparation of plates method.

Background technology

The good characteristics such as density is little, specific tenacity is high, specific rigidity is high owing to having, good springiness, shock resistance are good, corrosion-resistant, wear-resisting for aluminum and aluminum alloy mateial, high connductivity, high heat conduction, easily surface colour, easily processing, recyclable regeneration, are widely used in the industries such as communications and transportation, boats and ships, packaging vessel, building decoration, aerospace, mechanical electric apparatus, telecommunications, petrochemical complex.Especially, in aerospace industry, because aluminium is first-selected lightweight structure material, therefore consumption is very large.

In traditional material, although iron and steel and polymer-based composite have a large amount of application in the fields such as boats and ships, plate armour, communications and transportation, but high-magnesium aluminum alloy material has a series of over-all propertieies that iron and steel and macromolecular material do not possess, high specific strength and solidity to corrosion, excellent formability and weldability, easily reclaim and anti-aging, low density, make the application of aluminium alloy in shipbuilding more and more without features such as magnetic, low temperature environment performance are good, and have a high potential, have a extensive future.Therefore be trend of the times at the above-mentioned traffic transport industry aluminium related to for steel.

The production method critical process of 5XXX system high-magnesium aluminum alloy O state sheet material is: hot rolling+annealing process.The typical production process flow process of its O state sheet material is as follows: batching melting refining/degasification/filtration casting homogenizing annealing sawing end to end milling face preheating hot rolling finished products ( crosscut uncoiling) sawing quality inspection packaging warehouse-in or delivery.This technique has following shortcoming: (1) adds one-pass finished annealing process, the production cost greatly increased; (2), during annealing, aluminum alloy plate materials is heat-treated for a long time at high temperature, and make aluminum alloy sheet material surface generating portion oxidation etc., surface brightness is uneven, has a strong impact on aluminum alloy sheet material surface quality.

Summary of the invention

The object of the invention is to overcome the deficiencies in the prior art, there is provided a kind of new production technique to prepare 5XXX system high-magnesium aluminum alloy O state plate, when keeping high-magnesium aluminum alloy performance and tissue stabilization, production process can be reduced, reduce the surface quality defect of high-magnesium aluminum alloy, for thickness >=3mm aluminum alloy plate materials, realize hot rolling direct production product, finished product rate and production efficiency can be increased substantially.

The present invention is achieved in that

A kind of 5XXX system high-magnesium aluminum alloy O state preparation of plates method, is characterized in that: comprise melting, refining, casting, soaking, sawing and milling face, preheating, hot rolling, crosscut uncoiling or trimming, sawing and packaging warehouse-in, step is as follows:

(1) melting: dropped into by aluminium ingot in smelting furnace and carry out melting, reaches purity in 99.70% and above aluminium ingot input smelting furnace and carries out melting, and add magnalium master alloy, aluminium manganese master alloy, aluminium titanium boron wire, refining agent and slagging agent; Accelerate speed of melting by induction stirring, and take off slag operation to aluminium liquid slag inclusion, after skimming, composition analysis is carried out in sampling, makes its alloying constituent reach requirement;

(2) refining: go to holding furnace inside holding after aluminium liquid is heated to 720 ~ 760 DEG C, and carry out the interpolation of easy scaling loss alloying element, then carry out furnace refining; After aluminium liquid proceeds to holding furnace, open induction stirring, and be again heated to 720 ~ 760 DEG C, after refining completes, stopping induction stirring, then leaves standstill;

(3) cast: adopt semicontinuous casting to produce aluminium alloy cast ingot, ingot casting thickness is 300 ~ 700mm, and width is 1200 ~ 2670mm, and average casting speed is 60mm/min, adopt after aluminium alloy cast ingot side water-spraying control to 120 DEG C, then air natural is cooled to room temperature;

(4) soaking: aluminium alloy cast ingot is carried out equal thermal treatment 400 DEG C ~ 540 DEG C temperature, and during soaking, heat-up rate is 50 DEG C/h, be incubated 5 ~ 25 hours after reaching soaking temperature, then air natural is cooled to room temperature;

(5) sawing and milling face: after aluminium alloy cast ingot sawing is become requirement specification, respectively aluminium alloy cast ingot upper and lower surface and each mill off 10mm in side;

(6) preheating: aluminium alloy cast ingot is transferred in preheating oven, carries out preheating 400-540 DEG C of temperature, and warm up time is 2 ~ 25h;

(7) hot rolling: directly aluminium alloy cast ingot is hung out to transfer in hot rolls after preheating and carry out hot rolling, roll speed 2-3m/s, hot rolling finishing temperature >=350 DEG C;

(8) crosscut uncoiling or trimming: after the sheet material naturally cooling that hot rolling obtains, coiled material need carry out uncoiling trimming process; After the sheet material of thickness >=12mm and crosscut, the sheet material of thickness < 12mm forwards sawing machine again to and carries out sawing by finished product specification requirement;

(9) sawing: carry out sawing according to the trimmed size of customer requirement;

(10) packaging warehouse-in: inspection after construction, qualified rear packaging warehouse-in.

The chemical composition of the aluminium alloy O state sheet material obtained after the above refining is Mg:3.50 ~ 6.80%, Mn:0.40 ~ 1.50%, Zn≤1.0%, Cu≤0.50%, Fe≤0.40%, Si≤0.40%, Cr≤0.30%, Zr≤0.25%, Ti≤0.25% by weight percentage, single content≤0.05% of other impurity element, other impurity element total content≤0.15%, surplus is Al.

Above-described refining adopts chlorine and the refining of argon gas mixed gas, chlorine flowrate 0.1-0.18m 3/ h, chlorine gas pressure is 100-700Kpa, argon flow amount 2-8m 3/ h, argon pressure 200-1000Kpa, refining time is 20 ~ 50min.

During the above hot rolling, from preheating oven aluminium alloy cast ingot transferred between hot rolls transfer time≤10min.

Outstanding substantive distinguishing features of the present invention and significant progress are:

1,5XXX system of the present invention high-magnesium aluminum alloy O state preparation of plates method adopts new production technique to prepare 5XXX system high-magnesium aluminum alloy O state plate, when keeping high-magnesium aluminum alloy performance and tissue stabilization, the production process of annealing can be reduced, heat-treat for a long time at high temperature when avoiding aluminum alloy plate materials to anneal, make aluminum alloy sheet material surface generating portion oxidation etc., surface brightness is uneven, has a strong impact on aluminum alloy sheet material surface quality; And aluminum alloy plate materials repeatedly collides in handling process in the annealing operation course of processing, cause and surface quality defect is produced to aluminum alloy plate materials; And for thickness >=3mm aluminum alloy plate materials, realize hot rolling direct production product, finished product rate and production efficiency can be increased substantially.

2,5XXX system of the present invention high-magnesium aluminum alloy O state preparation of plates method decreases the annealing operation in former 5XXX system high-magnesium aluminum alloy O state sheet fabrication, make the production cost saving per ton 200-300 unit of high-magnesium aluminum alloy O state sheet material, decrease in annealing process the time of (heating up, being incubated and cooling) about 25 ~ 35 hours simultaneously, and have employed new hot rolling technology, the performance of the sheet material of production meets the service requirements of aluminium alloy O state sheet material.

Accompanying drawing explanation

Fig. 1 is 5XXX system high-magnesium aluminum alloy O state preparation of plates method process flow diagram of the present invention.

Fig. 2 is sheet material metallographic structure figure prepared by the present invention.

Fig. 3 is sheet material grain structure figure prepared by the present invention.

Embodiment

Below in conjunction with drawings and Examples, 5XXX system of the present invention high-magnesium aluminum alloy O state preparation of plates method is further described.

Embodiment 1

To produce 5083 aluminium alloy O state sheet materials:

(1) melting: dropped into by aluminium ingot in smelting furnace and carry out melting, reaches purity in 99.70% and above aluminium ingot input smelting furnace and carries out melting, and add magnalium master alloy, aluminium manganese master alloy, aluminium titanium boron wire, refining agent and slagging agent; Accelerate speed of melting by induction stirring, and take off slag operation to aluminium liquid slag inclusion, after skimming, composition analysis is carried out in sampling, makes its alloying constituent reach requirement;

(2) refining: go to holding furnace inside holding after aluminium liquid is heated to 720 ~ 760 DEG C, and carry out the interpolation of easy scaling loss alloying element, then carry out furnace refining; After aluminium liquid proceeds to holding furnace, open induction stirring, and be again heated to 720 ~ 760 DEG C, after refining completes, stopping induction stirring, then leaves standstill;

(3) cast: adopt semicontinuous casting to produce aluminium alloy cast ingot, ingot casting thickness is 520mm, and width is 1500mm, and average casting speed is 60mm/min, adopt after aluminium alloy cast ingot side water-spraying control to 120 DEG C, then air natural is cooled to room temperature;

(4) soaking: aluminium alloy cast ingot is carried out equal thermal treatment 450 DEG C of temperature, and during soaking, heat-up rate is 50 DEG C/h, be incubated 10 hours after reaching soaking temperature, then air natural is cooled to room temperature;

(5) sawing and milling face: after aluminium alloy cast ingot sawing is become requirement specification, respectively aluminium alloy cast ingot upper and lower surface and each mill off 10mm in side;

(6) preheating: aluminium alloy cast ingot is transferred in preheating oven, carries out preheating 500 DEG C of temperature, and warm up time is 5h;

(7) hot rolling: directly hung out to transfer in hot rolls by aluminium alloy cast ingot after preheating and carry out hot rolling, roll speed 2-3m/s, hot rolling finishing temperature is 356 DEG C;

(8) crosscut uncoiling or trimming: after the sheet material naturally cooling that hot rolling obtains, sheet material need carry out uncoiling trimming process; After the sheet material of thickness >=12mm and crosscut, the sheet material of thickness < 12mm forwards sawing machine again to and carries out sawing by finished product specification requirement;

(9) sawing: carry out sawing according to the trimmed size of customer requirement;

(10) packaging warehouse-in: inspection after construction, qualified rear packaging warehouse-in.

Table 1 former explained hereafter 7mm heavy-gauge sheeting performance index

State Rp0.2/MPa Rm/MPa A/% Hot rolling, before annealing 240 356 16 Hot rolling, annealing 400 DEG C/3h 156 303 26.5

Table 2 preparation method of the present invention produces 7mm heavy-gauge sheeting performance index:

State Rp0.2/MPa Rm/MPa A/% Finishing temperature 356 DEG C 152 301 26 Performance after 6 months 150 300 26

By table 1 and table 2 known, the present invention is in minimizing annealing operation and after improving hot rolling technology, and the high-magnesium aluminum alloy O state plate property of production reaches the performance requriements of the high-magnesium aluminum alloy O state sheet material of former explained hereafter completely.As shown in Figure 2, high-magnesium aluminum alloy O sheet material second-phase even dispersion distribution prepared by the present invention is separated out, crystal boundary Al 3mg 2discontinuous recipittaion; From seeing Fig. 3, recrystallize occurring, is typical O state tissue.

Claims (4)

1. a 5XXX system high-magnesium aluminum alloy O state preparation of plates method, is characterized in that: comprise melting, refining, casting, soaking, sawing and milling face, preheating, hot rolling, crosscut uncoiling or trimming, sawing and packaging warehouse-in, step is as follows:
(1) melting: dropped into by aluminium ingot in smelting furnace and carry out melting, reaches purity in 99.70% and above aluminium ingot input smelting furnace and carries out melting, and add magnalium master alloy, aluminium manganese master alloy, aluminium titanium boron wire, refining agent and slagging agent; Accelerate speed of melting by induction stirring, and take off slag operation to aluminium liquid slag inclusion, after skimming, composition analysis is carried out in sampling, makes its alloying constituent reach requirement;
(2) refining: go to holding furnace inside holding after aluminium liquid is heated to 720 ~ 760 DEG C, and carry out the interpolation of easy scaling loss alloying element, then carry out furnace refining; After aluminium liquid proceeds to holding furnace, open induction stirring, and be again heated to 720 ~ 760 DEG C, after refining completes, stopping induction stirring, then leaves standstill;
(3) cast: adopt semicontinuous casting to produce aluminium alloy cast ingot, ingot casting thickness is 300 ~ 700mm, and width is 1200 ~ 2670mm, and average casting speed is 60mm/min, adopt after aluminium alloy cast ingot side water-spraying control to 120 DEG C, then air natural is cooled to room temperature;
(4) soaking: aluminium alloy cast ingot is carried out equal thermal treatment 400 DEG C ~ 540 DEG C temperature, and during soaking, heat-up rate is 50 DEG C/h, be incubated 5 ~ 25 hours after reaching soaking temperature, then air natural is cooled to room temperature;
(5) sawing and milling face: after aluminium alloy cast ingot sawing is become requirement specification, respectively aluminium alloy cast ingot upper and lower surface and each mill off 10mm in side;
(6) preheating: aluminium alloy cast ingot is transferred in preheating oven, carries out preheating 400-540 DEG C of temperature, and warm up time is 2 ~ 25h;
(7) hot rolling: directly aluminium alloy cast ingot is hung out to transfer in hot rolls after preheating and carry out hot rolling, roll speed 2-3m/s, hot rolling finishing temperature >=350 DEG C;
(8) crosscut uncoiling or trimming: after the sheet material naturally cooling that hot rolling obtains, sheet material need carry out uncoiling trimming process; After the sheet material of thickness >=12mm and crosscut, the sheet material of thickness < 12mm forwards sawing machine again to and carries out sawing by finished product specification requirement;
(9) sawing: carry out sawing according to the trimmed size of customer requirement;
(10) packaging warehouse-in: inspection after construction, qualified rear packaging warehouse-in.
2. 5XXX system high-magnesium aluminum alloy O state preparation of plates method according to claim 1, it is characterized in that: the aluminum alloy chemically compositions in weight percentage obtained after described refining is Mg:3.50 ~ 6.80%, Mn:0.40 ~ 1.50%, Zn≤1.0%, Cu≤0.50%, Fe≤0.40%, Si≤0.40%, Cr≤0.30%, Zr≤0.25%, Ti≤0.25%, single content≤0.05% of other impurity element, other impurity element total content≤0.15%, surplus is Al.
3. 5XXX system high-magnesium aluminum alloy O state preparation of plates method according to claim 1, is characterized in that: described refining adopts chlorine and the refining of argon gas mixed gas, chlorine flowrate 0.1-0.18m 3/ h, chlorine gas pressure is 100-700Kpa, argon flow amount 2-8m 3/ h, argon pressure 200-1000Kpa, refining time is 20 ~ 50min.
4. 5XXX system high-magnesium aluminum alloy O state preparation of plates method according to claim 1, is characterized in that: during described hot rolling from preheating oven aluminium alloy cast ingot transferred between hot rolls transfer time≤10min.
CN201510498940.2A 2015-09-11 2015-09-11 Preparation method for high-magnesium aluminum alloy O-state plate of 5XXX series CN105177327A (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105543520A (en) * 2015-12-31 2016-05-04 广西南南铝加工有限公司 Preparing method of aluminum alloy base material for electronic product shell
CN105908026A (en) * 2016-05-31 2016-08-31 苏州有色金属研究院有限公司 5xxx aluminum alloy board for automobile body and manufacturing method thereof
CN106222498A (en) * 2016-08-29 2016-12-14 河南明泰铝业股份有限公司 A kind of hub of motorcycle aluminium alloy plate and preparation method thereof
CN106521267A (en) * 2016-12-11 2017-03-22 广西大学 Casting method for aluminum alloy precision template
CN106544556A (en) * 2016-12-11 2017-03-29 广西大学 A kind of heat treatment method of precision aluminium-alloy template
CN106756285A (en) * 2016-11-16 2017-05-31 东北大学 A kind of preparation method of 6022 aluminum alloy plate materials
CN106756284A (en) * 2016-11-16 2017-05-31 东北大学 A kind of preparation method of 6111 aluminum alloy plate materials
CN106756287A (en) * 2016-11-16 2017-05-31 东北大学 A kind of preparation method of 6016 aluminum alloy plate materials
CN106756310A (en) * 2017-01-09 2017-05-31 镇江华中电器有限公司 Marine cable laying apparatu sheet material special utility improved corrosion high intensity alumal and preparation method thereof
CN106756286A (en) * 2016-11-16 2017-05-31 东北大学 A kind of preparation method of 6181 aluminum alloy plate materials
CN108251666A (en) * 2018-02-01 2018-07-06 广西南南铝加工有限公司 A kind of preparation process of super high Mg-Al alloy plate
CN108330419A (en) * 2018-03-16 2018-07-27 北京工业大学 A kind of thermal deformation of Al-Mg-Mn-Er-Zr sheet alloys and its stabilization process
CN109332384A (en) * 2018-08-28 2019-02-15 广西南南铝加工有限公司 A kind of high-magnesium aluminum alloy state rolling preparation process
CN109554559A (en) * 2018-12-05 2019-04-02 天津忠旺铝业有限公司 A kind of preparation method of 5754 aluminum alloy plate materials of automobile
EP3569721A1 (en) * 2018-05-18 2019-11-20 Aleris Rolled Products Germany GmbH Method of manufacturing an al-mg-mn alloy plate product

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US20030164207A1 (en) * 2002-02-05 2003-09-04 Kazuhisa Kashiwazaki Aluminum alloy pipe having multistage formability
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Cited By (22)

* Cited by examiner, † Cited by third party
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CN105543520B (en) * 2015-12-31 2017-11-03 广西南南铝加工有限公司 A kind of preparation method of electronic product casing aluminum alloy base material
CN105543520A (en) * 2015-12-31 2016-05-04 广西南南铝加工有限公司 Preparing method of aluminum alloy base material for electronic product shell
CN105908026A (en) * 2016-05-31 2016-08-31 苏州有色金属研究院有限公司 5xxx aluminum alloy board for automobile body and manufacturing method thereof
CN106222498A (en) * 2016-08-29 2016-12-14 河南明泰铝业股份有限公司 A kind of hub of motorcycle aluminium alloy plate and preparation method thereof
CN106222498B (en) * 2016-08-29 2017-12-01 河南明泰铝业股份有限公司 A kind of hub of motorcycle aluminium alloy plate and preparation method thereof
CN106756287B (en) * 2016-11-16 2018-04-06 东北大学 A kind of preparation method of 6016 aluminum alloy plate materials
CN106756284A (en) * 2016-11-16 2017-05-31 东北大学 A kind of preparation method of 6111 aluminum alloy plate materials
CN106756287A (en) * 2016-11-16 2017-05-31 东北大学 A kind of preparation method of 6016 aluminum alloy plate materials
CN106756284B (en) * 2016-11-16 2018-04-06 东北大学 A kind of preparation method of 6111 aluminum alloy plate materials
CN106756286A (en) * 2016-11-16 2017-05-31 东北大学 A kind of preparation method of 6181 aluminum alloy plate materials
CN106756285B (en) * 2016-11-16 2018-04-06 东北大学 A kind of preparation method of 6022 aluminum alloy plate materials
CN106756286B (en) * 2016-11-16 2018-04-06 东北大学 A kind of preparation method of 6181 aluminum alloy plate materials
CN106756285A (en) * 2016-11-16 2017-05-31 东北大学 A kind of preparation method of 6022 aluminum alloy plate materials
CN106521267A (en) * 2016-12-11 2017-03-22 广西大学 Casting method for aluminum alloy precision template
CN106544556A (en) * 2016-12-11 2017-03-29 广西大学 A kind of heat treatment method of precision aluminium-alloy template
CN106756310A (en) * 2017-01-09 2017-05-31 镇江华中电器有限公司 Marine cable laying apparatu sheet material special utility improved corrosion high intensity alumal and preparation method thereof
CN108251666A (en) * 2018-02-01 2018-07-06 广西南南铝加工有限公司 A kind of preparation process of super high Mg-Al alloy plate
CN108330419A (en) * 2018-03-16 2018-07-27 北京工业大学 A kind of thermal deformation of Al-Mg-Mn-Er-Zr sheet alloys and its stabilization process
EP3569721A1 (en) * 2018-05-18 2019-11-20 Aleris Rolled Products Germany GmbH Method of manufacturing an al-mg-mn alloy plate product
WO2019219453A1 (en) * 2018-05-18 2019-11-21 Aleris Rolled Products Germany Gmbh Method of manufacturing an al-mg-mn alloy plate product
CN109332384A (en) * 2018-08-28 2019-02-15 广西南南铝加工有限公司 A kind of high-magnesium aluminum alloy state rolling preparation process
CN109554559A (en) * 2018-12-05 2019-04-02 天津忠旺铝业有限公司 A kind of preparation method of 5754 aluminum alloy plate materials of automobile

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Application publication date: 20151223