CN109332384A - A kind of high-magnesium aluminum alloy state rolling preparation process - Google Patents

A kind of high-magnesium aluminum alloy state rolling preparation process Download PDF

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Publication number
CN109332384A
CN109332384A CN201810990296.4A CN201810990296A CN109332384A CN 109332384 A CN109332384 A CN 109332384A CN 201810990296 A CN201810990296 A CN 201810990296A CN 109332384 A CN109332384 A CN 109332384A
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temperature
casting
hot rolling
plate
melting
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CN201810990296.4A
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CN109332384B (en
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赵启忠
何建贤
杨鸿驰
莫灼强
肖刚
张新明
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广西南南铝加工有限公司
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B3/00Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences Rolling of aluminium, copper, zinc or other non-ferrous metals
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B15/00Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B37/00Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74Temperature control, e.g. by cooling or heating the rolls or the product
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making alloys
    • C22C1/02Making alloys by melting
    • C22C1/026Alloys based on aluminium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
    • C22C21/06Alloys based on aluminium with magnesium as the next major constituent
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
    • C22C21/06Alloys based on aluminium with magnesium as the next major constituent
    • C22C21/08Alloys based on aluminium with magnesium as the next major constituent with silicon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/047Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B3/00Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B2003/001Aluminium or its alloys

Abstract

The invention discloses a kind of high-magnesium aluminum alloy states to roll preparation process, it is related to aluminum alloy processing technology field, to solve plate thickness in a manner of existing high-magnesium aluminum alloy processing hardening, restricted width, it stretches and strengthens the problems such as needing larger pulling force stretching-machine and more manufacturing procedure, it include mainly ingredient, melting, casting, soaking, sawing, milling face, preheating, hot rolling and etc., by reasonably selecting alloy compositions, casting, smelting parameter, different hot-rolled process parameters etc. are selected using twin-stage even heat treatment and according to different Mg contents, to obtain the high Mg-Al alloy plate haveing excellent performance.The present invention is not necessarily to cold rolling, small to thickness, width limitation, strengthens without stretch process, can simplify production technology, and save the cost improves production efficiency;For plate property, it can be achieved that plate is hot rolling microstructure, production technology is more succinct, efficient, obtains the good high Mg-Al alloy plate of good mechanical properties, corrosion resistance after directly controlling rolling by hot rolling.

Description

A kind of high-magnesium aluminum alloy state rolling preparation process

Technical field

The present invention relates to aluminum alloy processing technology fields more particularly to a kind of high-magnesium aluminum alloy state to roll preparation process.

Background technique

For high Mg-Al alloy plate due to intensity height, corrosivity is good, is widely used in the fields such as ship, plate armour, communications and transportation. High-magnesium aluminum alloy is a kind of cold work hardening alloy, and after ingredient is fixed, conventional machining method for curing is predominantly cold reduced work hardened It is hardened with stretch process.Existing high-magnesium aluminum alloy processing hardening mode has the disadvantages that (1) cold-rolling thickness is generally limited to 10mm is hereinafter, limit the production of slab;Width is generally less than 2600mm, limits the production of ultra-wide plate;(2) it stretches to strengthen and need The stretching-machine of larger pulling force is easy to disconnected plate when extensibility is larger;(3) production process is more, adds additional production cost, production Low efficiency, period are slow;(4) plate corrosive nature is unstable.

In order to break through limitation of the cold rolling to board dimension, the patent CN104357690A of applicant's earlier application discloses one The preparation process of strong anti-corrosion high Mg-Al alloy plate, improves traditional processing process, is replaced with stretching mode cold in kind Processing hardening is rolled, and the ginseng such as suitable homogenizing annealing temperature, preheating temperature, finishing temperature, extensibility is had adjusted by test Number breaks through the limitation of cold-rolling mill opening degree, produces the biggish plate of thickness.The plate thickness of traditional handicraft cold rolling production is generally 10mm hereinafter, and disclosed in CN104357690A in strong anti-corrosion high Mg-Al alloy plate preparation process production plate thickness Degree is 4-50mm.But it is strengthened by the way of stretching, still can not solve the stretching that larger pulling force is needed when stretching Machine, and the problem of when extensibility is larger is easy to disconnected plate, while stretching-machine and sawing process are increased, lead to the increasing of production cycle Sum it up the increase of cost.

Summary of the invention

Against the above deficiency, the present invention provides a kind of high Mg-Al alloy plate preparation strengthened without cold rolling without stretching Technique is directly controlled hot rolling finishing temperature and reduction ratio, obtains corresponding alloy and add by hot rolling according to alloying component The performance and tissue of work hardening state realize corresponding state rolling.

In order to achieve the above objectives, the present invention adopts the following technical scheme:

A kind of high-magnesium aluminum alloy state rolls preparation process, includes ingredient, melting, casting, soaking, sawing, milling face, pre- Heat, hot rolling, steps are as follows:

(1) ingredient: being by mass percentage Mg:2.5-7.5%, Si :≤0.45%, Fe :≤0.5%, Cu :≤ 0.25%, Mn:0.1-1.2%, Cr :≤0.3%, Zn :≤0.9%, Ti :≤0.2%, Zr :≤0.25%, other are Al and one The amount ingredient of a little inevitably impurity elements;

(2) melting, casting: smelting temperature is 720-780 DEG C, melting 4-15h, and holding furnace is entered after melting and is refined, heat preservation Temperature is 700-740 DEG C, soaking time 1.5-10h, 685-730 DEG C of casting temperature, obtains ingot casting, ingot casting thickness 300- 700mm;

(3) soaking: ingot casting carries out twin-stage even heat treatment, and first order heating rate is 40-80 DEG C/h, is warming up to 400- 480 DEG C, 1-8h is kept the temperature, second level heating rate is 20-60 DEG C/h, is warming up to 470-550 DEG C, keeps the temperature 5-25h, be subsequently cooled to Room temperature;

(4) ingot casting sawing, milling face: is subjected to sawing and milling face;

(5) preheating, hot rolling: the ingot casting after processing is preheated, and preheating temperature is 420-545 DEG C, and the time is 1~25h; Carry out hot rolling, when Mg content be more than or equal to 2.5%, less than 3.0% when, finishing temperature be 250-290 DEG C;When Mg content be greater than etc. In 3.0%, less than 4.0% when, finishing temperature be 240-280 DEG C;When Mg be more than or equal to 4.0%, less than 4.7% when, finish to gauge temperature Degree is 235-275 DEG C;When Mg content be more than or equal to 4.7%, less than 5.3% when, finishing temperature be 230-260 DEG C;When Mg content More than or equal to 5.3%, less than 5.9% when, finishing temperature be 220-255 DEG C;When Mg content is more than or equal to 5.9%, less than 6.3 When, finishing temperature is 215-250 DEG C;When Mg content is more than or equal to 6.3%, less than 7.5%, finishing temperature is 210-250 DEG C;Heat It rolls rear plate cooling and obtains finished product.

Further, in step (2), during melting and casting, multi-stage degassing processing is carried out to aluminium alloy melt;It chooses The filter plate of 30ppi-40ppi is filtered aluminum melt.

Further, in step (5), hot rolling uses multi- pass rolling, and final passes reduction ratio is 10%-35%.

Further, in step (5), plate is after hot rolling with a thickness of 4-200mm.

Further, in step (2), smelting temperature is 725-745 DEG C, melting 5-7h, and heat preservation furnace temperature is 715-725 DEG C, soaking time 3.5-4.5h, 690-720 DEG C of casting temperature.

Further, in step (3), in twin-stage even heat treatment, first order heating rate is 50-60 DEG C/h, is warming up to 420-460 DEG C, 2-6h is kept the temperature, second level heating rate is 30-50 DEG C/h, is warming up to 480-520 DEG C, keeps the temperature 8-18h.

Further, in step (4), Sawing Process are as follows: casting head sawing 250-500mm, tail portion 150-400mm, milling Face technique are as follows: it is 7.5mm-20mm that single side, which mills face amount,.

Further, in step (5), preheating temperature is 460-480 DEG C, time 8-10h.

Compared with prior art, the beneficial effects of the present invention are:

1, the present invention is not necessarily to cold rolling, small to thickness limitation, strengthens without stretch process, and the strip width of production is wider, So as to simplify production technology, production cost is saved, production efficiency is improved;

2, the present invention directly controls after rolling plate property by hot rolling and according to alloying component, is controlled by hot rolling Hot rolling finishing temperature and reduction ratio obtain the performance and tissue of corresponding alloy work-hardened condition, realize corresponding state rolling, By realizing that plate is hot rolling microstructure, production technology is more succinct, efficient, and plate thickness is maximum, width is wider, and can improve Corrosion resistance improves the performance of heat affected area after welding;

3, present invention adjustment, optimize material component, using twin-stage even heat treatment mode, optimize melting, casting, equal Heat, sawing, the parameter for milling face, preheating, hot rolling, obtain the good high-magnesium aluminum alloy plate of good mechanical properties, corrosion resistance Material.

Specific embodiment

The technical scheme in the embodiments of the invention will be clearly and completely described below.Obviously, described implementation Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects It encloses.

The present invention provides a kind of high-magnesium aluminum alloy state rolling preparation process, includes ingredient, melting, casting, soaking, saw It cuts, milling face, preheating, hot rolling, specific as follows:

(1) ingredient: being by mass percentage Mg:2.5-7.5%, Si :≤0.45%, Fe :≤0.5%, Cu :≤ 0.25%, Mn:0.1-1.2%, Cr :≤0.3%, Zn :≤0.9%, Ti :≤0.2%, Zr :≤0.25%, other are Al and one The amount ingredient of a little inevitably impurity elements;

(2) melting, casting: smelting temperature is 720-780 DEG C, melting 4-15h, and molten aluminum is put into essence in holding furnace after melting Refining, holding temperature are 700-740 DEG C, soaking time 1.5-10h, 685-730 DEG C of casting temperature, obtain ingot casting, ingot casting thickness is 300-700mm;Wherein, during melting and casting, by carrying out multi-stage degassing processing to aluminium alloy melt, it is molten to significantly reduce aluminium Air content in body, to reduce the casting flaws such as the stomata in aluminium alloy cast ingot, loose;The filter plate of 30ppi-40ppi is chosen, Oxide, non-metallic inclusion and other harmful metal impurities in aluminum melt are removed, are lacked with reducing the castings such as slag inclusion in ingot casting It falls into;Casting uses semi-continuous casting production technology;

(3) soaking: ingot casting carries out twin-stage even heat treatment, and first order heating rate is 40-80 DEG C/h, is warming up to 400- 480 DEG C, 1-8h is kept the temperature, with the second phase of melt back Al3Mg2Into aluminum substrate, Al is prevented3Mg2Scaling loss or burning under phase high temperature, second Grade heating rate is 20-60 DEG C/h, is warming up to 470-550 DEG C, keeps the temperature 5-25h, to remove ingot casting internal stress, is reduced each in ingot casting The segregation of alloying element, the high temperature impurity infusibility phase being partly dissolved in ingot casting, is cooled to room temperature after soaking;

(4) ingot casting sawing, milling face: is subjected to sawing and milling face;Sawing Process are as follows: casting head sawing 250-500mm, tail Portion 150-400mm, scalping process are as follows: it is 7.5mm-20mm that single side, which mills face amount,;

(5) preheating, hot rolling: the ingot casting after processing is preheated, and preheating temperature is 420-545 DEG C, and the time is 1~25h; Carry out hot rolling, when Mg content be more than or equal to 2.5%, less than 3.0% when, finishing temperature be 250-290 DEG C;When Mg content be greater than etc. In 3.0%, less than 4.0% when, finishing temperature be 240-280 DEG C;When Mg be more than or equal to 4.0%, less than 4.7% when, finish to gauge temperature Degree is 235-275 DEG C;When Mg content be more than or equal to 4.7%, less than 5.3% when, finishing temperature be 230-260 DEG C;When Mg content More than or equal to 5.3%, less than 5.9% when, finishing temperature be 220-255 DEG C;When Mg content is more than or equal to 5.9%, less than 6.3 When, finishing temperature is 215-250 DEG C;When Mg content is more than or equal to 6.3%, less than 7.5%, finishing temperature is 210-250 DEG C;Root Hot rolling is selected to prick temperature (being as general as increasing with Mg content, pricking temperature eventually reduces) eventually, according to different Mg contents with control Hot rolling is rolled in alloy recrystallization temperature following temperature section, and rolling temperature is not again excessive is lower than recrystallization temperature, so that rolling Process processed generates cold work hardening effect;Plate cooling obtains finished product after hot rolling;Hot rolling preferably uses multi- pass rolling, final road Secondary rolling reduction ratio is 10%-35%, and plate is after preferred hot rolling with a thickness of 4-200mm, preferred rolling pass, rolling pressure Rate and plate thickness selection can aid in cooperation hot rolling technology to realize plate Strip Shape Control to obtain excellent plate property.

The following are more specific embodiments.

Embodiment 1

The present embodiment provides a kind of high-magnesium aluminum alloy states to roll preparation process, and steps are as follows:

(1) ingredient: being by mass percentage Mg:2.76%, Si:0.18%, Fe:0.2%, Cu:0.07%, Mn: 0.78%, Cr:0.14%, Zn:0.16%, Ti:0.12%, other match for the amount of Al and some inevitable impurity elements Material;

(2) melting, casting: being put into melting in smelting furnace for above-mentioned raw material, and smelting temperature is 760-780 DEG C, melting 7h, Enter holding furnace after melting is complete to refine, holding temperature is 730-740 DEG C, soaking time 1.5h, is carried out aluminium alloy melt multistage Degassing processing significantly reduces the air content in aluminum melt, to reduce the casting flaws such as the stomata in aluminium alloy flat bloom, loose, choosing The filter plate of 30ppi is taken, oxide, non-metallic inclusion and other harmful metal impurities in aluminum melt are removed, to reduce casting The casting flaws such as slag inclusion in ingot 730 DEG C of casting temperature, are obtained except using semi-continuous casting to produce ingot casting after the completion of impurity, degasification Ingot casting, ingot casting are thick, wide, long having a size of 460 × 1550 × 6000mm;

(3) soaking: carrying out twin-stage even heat treatment for gained ingot casting, and first order soaking heating rate is 65-75 DEG C/h, is risen Temperature keeps the temperature 1.5h to 450 DEG C, and soaking heating rate in the second level is 40-50 DEG C/h, is warming up to 530 DEG C, keeps the temperature 10h, then cool down To room temperature;

(4) sawing, milling face: sawing and milling face are carried out after twin-stage even heat treatment, specification is 440 behind ingot casting sawing, milling face ×1530×5500mm;

(5) preheating, hot rolling: the ingot casting behind sawing, milling face is preheated, and preheating temperature is 545 DEG C, time 15h;Into Row hot rolling, hot rolling use multi- pass rolling, and finishing temperature is 262-285 DEG C, and final passes reduction ratio is 16.7%, hot rolling Plate is afterwards with a thickness of 200mm;Finished product is obtained after cooling.

To the obtained finished product sample detection mechanical property of embodiment 1 and corrosive nature after cooling, performance corresponds to number A in table 1.

Embodiment 2

The present embodiment provides a kind of high-magnesium aluminum alloy states to roll preparation process, and steps are as follows:

(1) ingredient: being by mass percentage Mg:4.11%, Si:0.20%, Fe:0.23%, Cu:0.06%, Mn: 0.55%, Cr:0.17%, Zn:0.13%, Ti:0.09%, other match for the amount of Al and some inevitable impurity elements Material, wherein total impurities are no more than 0.15%, and the amount of single impurity is no more than 0.05%;

(2) melting, casting: being put into melting in smelting furnace for above-mentioned raw material, and smelting temperature is 752-775 DEG C, melting 9h, Enter holding furnace after melting is complete to refine, holding temperature is 726-737 DEG C, soaking time 2.5h, is carried out aluminium alloy melt multistage Degassing processing significantly reduces the air content in aluminum melt, to reduce the casting flaws such as the stomata in aluminium alloy flat bloom, loose, choosing The filter plate of 30ppi is taken, oxide, non-metallic inclusion and other harmful metal impurities in aluminum melt are removed, to reduce casting The casting flaws such as slag inclusion in ingot 722 DEG C of casting temperature, are obtained except using semi-continuous casting to produce ingot casting after the completion of impurity, degasification Ingot casting, ingot casting are thick, wide, long having a size of 300 × 1360 × 7000mm;

(3) soaking: carrying out twin-stage even heat treatment for gained ingot casting, and first order soaking heating rate is 65-85 DEG C/h, is risen Temperature keeps the temperature 8h to 400 DEG C, and soaking heating rate in the second level is 25-40 DEG C/h, is warming up to 470 DEG C, keeps the temperature 25h, be subsequently cooled to Room temperature;

(4) sawing, milling face: sawing and milling face are carried out after twin-stage even heat treatment, specification is 280 behind ingot casting sawing, milling face ×1340×6500mm;

(5) preheating, hot rolling: the ingot casting behind sawing, milling face is preheated, and preheating temperature is 420 DEG C, time 25h;Into Row hot rolling, hot rolling use multi- pass rolling, and finishing temperature is 255-270 DEG C, and final passes reduction ratio is 23%, after hot rolling Plate thickness is 50mm;Finished product is obtained after cooling.

To the obtained finished product sample detection mechanical property of embodiment 2 and corrosive nature after cooling, performance corresponds to number B in table 1.

Embodiment 3

The present embodiment provides a kind of high-magnesium aluminum alloy states to roll preparation process, and steps are as follows:

(1) ingredient: being by mass percentage Mg:4.65%, Si:0.15%, Fe:0.18%, Cu:0.08%, Mn: 0.71%, Cr:0.15%, Zn:0.12%, Ti:0.10%, other match for the amount of Al and some inevitable impurity elements Material, wherein total impurities are no more than 0.15%, and the amount of single impurity is no more than 0.05%;

(2) melting, casting: above-mentioned raw material are put into melting in smelting furnace, smelting temperature is 748-770 DEG C, melting 15h enters holding furnace after melting is complete and refines, and holding temperature is 715-730 DEG C, soaking time 10h, carries out to aluminium alloy melt more Grade degassing processing, significantly reduces the air content in aluminum melt, to reduce the casting flaws such as the stomata in aluminium alloy flat bloom, loose, The filter plate of 40ppi is chosen, oxide, non-metallic inclusion and other harmful metal impurities in aluminum melt are removed, to reduce The casting flaws such as slag inclusion in ingot casting 722 DEG C of casting temperature, are obtained except using semi-continuous casting to produce ingot casting after the completion of impurity, degasification To ingot casting, ingot casting is thick, wide, long having a size of 650 × 2670 × 4000mm;

(3) soaking: carrying out twin-stage even heat treatment for gained ingot casting, and first order soaking heating rate is 40-60 DEG C/h, is risen Temperature keeps the temperature 1.5h to 450 DEG C, and soaking heating rate in the second level is 40-50 DEG C/h, is warming up to 550 DEG C, keeps the temperature 10h, then cool down To room temperature;

(4) sawing, milling face: sawing and milling face are carried out after twin-stage even heat treatment, specification is 620 behind ingot casting sawing, milling face ×2630×3500mm;

(5) preheating, hot rolling: the ingot casting behind sawing, milling face is preheated, and preheating temperature is 545 DEG C, time 5h;Into Row hot rolling, hot rolling use multi- pass rolling, and finishing temperature is 250-271 DEG C, and final passes reduction ratio is 35%, after hot rolling Plate thickness is 4mm;Finished product is obtained after cooling.

To the obtained finished product sample detection mechanical property of embodiment 3 and corrosive nature after cooling, performance corresponds to number C in table 1.

Embodiment 4

The present embodiment provides a kind of high-magnesium aluminum alloy states to roll preparation process, and steps are as follows:

(1) ingredient: being by mass percentage Mg:5.20%, Si:0.10%, Fe:0.17%, Cu:0.06%, Mn: 0.68%, Cr:0.11%, Zn:0.15%, Ti:0.15%, other match for the amount of Al and some inevitable impurity elements Material;

(2) melting, casting: being put into melting in smelting furnace for above-mentioned raw material, and smelting temperature is 740-760 DEG C, melting 6h, Enter holding furnace after melting is complete to refine, holding temperature is 716-732 DEG C, soaking time 7h, carries out multistage to aluminium alloy melt and removes Gas disposal significantly reduces the air content in aluminum melt, to reduce the casting flaws such as the stomata in aluminium alloy flat bloom, loose, chooses The filter plate of 30ppi removes oxide, non-metallic inclusion and other harmful metal impurities in aluminum melt, to reduce ingot casting The casting flaws such as middle slag inclusion 710 DEG C of casting temperature, are cast except using semi-continuous casting to produce ingot casting after the completion of impurity, degasification Ingot, ingot casting are thick, wide, long having a size of 580 × 1680 × 6000mm;

(3) soaking: carrying out twin-stage even heat treatment for gained ingot casting, and first order soaking heating rate is 45-60 DEG C/h, is risen Temperature keeps the temperature 5h to 440 DEG C, and soaking heating rate in the second level is 20-35 DEG C/h, is warming up to 490 DEG C, keeps the temperature 10h, be subsequently cooled to Room temperature;

(4) sawing, milling face: sawing and milling face are carried out after twin-stage even heat treatment, specification is 560 behind ingot casting sawing, milling face ×1650×5500mm;

(5) preheating, hot rolling: the ingot casting behind sawing, milling face is preheated, and preheating temperature is 460 DEG C, time 8h;Into Row hot rolling, hot rolling use multi- pass rolling, and finishing temperature is 245-260 DEG C, and final passes reduction ratio is 10%, after hot rolling Plate thickness is 7mm;Finished product is obtained after cooling.

To the obtained finished product sample detection mechanical property of embodiment 4 and corrosive nature after cooling, performance corresponds to number D in table 1.

Embodiment 5

The present embodiment provides a kind of high-magnesium aluminum alloy states to roll preparation process, and steps are as follows:

(1) ingredient: being by mass percentage Mg:5.65%, Si:0.19%, Fe:0.22%, Cu:0.16%, Mn: 0.95%, Cr:0.13%, Zn:0.71%, Ti:0.12%, Zr:0.15%, other are Al and some inevitable impurity members The amount ingredient of element, wherein total impurities are no more than 0.15%, and the amount of single impurity is no more than 0.05%;

(2) melting, casting: being put into melting in smelting furnace for above-mentioned raw material, and smelting temperature is 735-762 DEG C, melting 6h, Enter holding furnace after melting is complete to refine, holding temperature is 710-725 DEG C, soaking time 3h, carries out multistage to aluminium alloy melt and removes Gas disposal significantly reduces the air content in aluminum melt, to reduce the casting flaws such as the stomata in aluminium alloy flat bloom, loose, chooses The filter plate of 40ppi removes oxide, non-metallic inclusion and other harmful metal impurities in aluminum melt, to reduce ingot casting The casting flaws such as middle slag inclusion 695 DEG C of casting temperature, are cast except using semi-continuous casting to produce ingot casting after the completion of impurity, degasification Ingot, ingot casting are thick, wide, long having a size of 550 × 2110 × 4500mm;

(3) soaking: carrying out twin-stage even heat treatment for gained ingot casting, and first order soaking heating rate is 50-71 DEG C/h, is risen Temperature keeps the temperature 3h to 420 DEG C, and soaking heating rate in the second level is 36-51 DEG C/h, is warming up to 500 DEG C, keeps the temperature 12h, be subsequently cooled to Room temperature;

(4) sawing, milling face: sawing and milling face are carried out after twin-stage even heat treatment, specification is 520 behind ingot casting sawing, milling face ×2080×4000mm;

(5) preheating, hot rolling: the ingot casting behind sawing, milling face is preheated, and preheating temperature is 495 DEG C, time 5h;Into Row hot rolling, hot rolling use multi- pass rolling, and finishing temperature is 230-245 DEG C, and final passes reduction ratio is 28%, after hot rolling Plate thickness is 12mm;Finished product is obtained after cooling.

To the obtained finished product sample detection mechanical property of embodiment 5 and corrosive nature after cooling, performance corresponds to number E in table 1.

Embodiment 6

The present embodiment provides a kind of high-magnesium aluminum alloy states to roll preparation process, and steps are as follows:

(1) ingredient: being by mass percentage Mg:6.02%, Si:0.11%, Fe:0.21%, Cu:0.05%, Mn: 0.65%, Cr:0.02%, Zn:0.11%, Ti:0.07%, Zr:0.09%, other are Al and some inevitable impurity members The amount ingredient of element;

(2) melting, casting: above-mentioned raw material are put into melting in smelting furnace, smelting temperature is 720-760 DEG C, melting 10h enters holding furnace after melting is complete and refines, and holding temperature is 700-725 DEG C, soaking time 7h, carries out to aluminium alloy melt more Grade degassing processing, significantly reduces the air content in aluminum melt, to reduce the casting flaws such as the stomata in aluminium alloy flat bloom, loose, The filter plate of 40ppi is chosen, oxide, non-metallic inclusion and other harmful metal impurities in aluminum melt are removed, to reduce The casting flaws such as slag inclusion in ingot casting 690 DEG C of casting temperature, are obtained except using semi-continuous casting to produce ingot casting after the completion of impurity, degasification To ingot casting, ingot casting is thick, wide, long having a size of 360 × 1360 × 7200mm;

(3) soaking: carrying out twin-stage even heat treatment for gained ingot casting, and first order soaking heating rate is 42-58 DEG C/h, is risen Temperature keeps the temperature 2h to 410 DEG C, and soaking heating rate in the second level is 32-45 DEG C/h, is warming up to 520 DEG C, keeps the temperature 8h, be subsequently cooled to Room temperature;

(4) sawing, milling face: sawing and milling face are carried out after twin-stage even heat treatment, specification is 340 behind ingot casting sawing, milling face ×1340×6700mm;

(5) preheating, hot rolling: the ingot casting behind sawing, milling face is preheated, and preheating temperature is 480 DEG C, time 10h;Into Row hot rolling, hot rolling use multi- pass rolling, and finishing temperature is 226-240 DEG C, and final passes reduction ratio is 26%, after hot rolling Plate thickness is 30mm;Finished product is obtained after cooling.

To the obtained finished product sample detection mechanical property of embodiment 6 and corrosive nature after cooling, performance corresponds to number F in table 1.

Embodiment 7

The present embodiment provides a kind of high-magnesium aluminum alloy states to roll preparation process, and steps are as follows:

(1) ingredient: being by mass percentage Mg:6.35%, Si:0.12%, Fe:0.21%, Cu:0.05%, Mn: 0.65%, Cr:0.02%, Zn:0.11%, Ti:0.07%, other match for the amount of Al and some inevitable impurity elements Material;

(2) melting, casting: above-mentioned raw material are put into melting in smelting furnace, smelting temperature is 725-765 DEG C, melting 12h enters holding furnace after melting is complete and refines, and holding temperature is 710-725 DEG C, soaking time 2h, carries out to aluminium alloy melt more Grade degassing processing, significantly reduces the air content in aluminum melt, to reduce the casting flaws such as the stomata in aluminium alloy flat bloom, loose, The filter plate of 40ppi is chosen, oxide, non-metallic inclusion and other harmful metal impurities in aluminum melt are removed, to reduce The casting flaws such as slag inclusion in ingot casting 722 DEG C of casting temperature, are obtained except using semi-continuous casting to produce ingot casting after the completion of impurity, degasification To ingot casting, ingot casting is thick, wide, long having a size of 520 × 1620 × 6600mm;

(3) soaking: carrying out twin-stage even heat treatment for gained ingot casting, and first order soaking heating rate is 62-75 DEG C/h, is risen Temperature keeps the temperature 6h to 405 DEG C, and soaking heating rate in the second level is 35-48 DEG C/h, is warming up to 480 DEG C, keeps the temperature 20h, be subsequently cooled to Room temperature;

(4) sawing, milling face: sawing and milling face are carried out after twin-stage even heat treatment, specification is 500 behind ingot casting sawing, milling face ×1600×6000mm;

(5) preheating, hot rolling: the ingot casting behind sawing, milling face is preheated, and preheating temperature is 485 DEG C, time 6h;Into Row hot rolling, hot rolling use multi- pass rolling, and finishing temperature is 212-237 DEG C, and final passes reduction ratio is 16%, after hot rolling Plate thickness is 20mm;Finished product is obtained after cooling.

To the obtained finished product sample detection mechanical property of embodiment 7 and corrosive nature after cooling, performance corresponds to number G in table 1.

Table 1 obtains the mechanical property of finished product by the application specific embodiment and corrosive nature and the application are embodied The mechanical property and corrosive nature reference value of the aluminium alloy (prior art) of the aluminium alloy component generic series of example.According to a group graduation Point, the aluminium alloy in embodiment 1 belongs to 5454 aluminium alloys, and the aluminium alloy in embodiment 2 belongs to 5086 aluminium alloys, in embodiment 3 Aluminium alloy belong to 5083 aluminium alloys, the aluminium alloy in embodiment 4 belongs to 5456 aluminium alloys, and the aluminium alloy in embodiment 5 belongs to 5059 aluminium alloys, the aluminium alloy in embodiment 6 belong to 1561 aluminium alloys, and the aluminium alloy in embodiment 7 belongs to 5A06 aluminium alloy.Its In, in table 1, H32, H321, H116 refer to condition of aluminium alloy.In one column of Peeling Corrosion, N refers to that corrosion is not serious: having on surface micro- Erosion or decoloration phenomenon;PA refers to surface in slight spot corrosion;PB refers to that surface pitting is more serious, but is all satisfied ASTMG66 sea water simulation Corrosion requires.As can be seen from Table 1, the mechanical property and corrosive nature of the obtained finished product of the specific embodiment of the application up to or over The mechanical property and corrosive nature of homologous series (different process) aluminium alloy shows the high magnalium produced using the technique of the application The performance of sheet alloy product reaches H32, H116, H321 performance requirement of respective alloy, illustrates raw by the technique of the application The high Mg-Al alloy plate of production still has excellent power in the case where reducing production process (without cold rolling and stretching reinforcing) Learn performance and corrosive nature.

1 each sample mechanical property of table and corrosive nature

High Mg-Al alloy plate preparation process of the present invention breaks through the thickness and width limit of conventional cold rolling mill plate preparation System, thickness can achieve 200mm, and width can achieve 3800mm.Process aluminium alloy plate produced according to the invention Material retains the tissue and corrosive nature of high temperature rolling plate, improves plate later period applied at elevated temperature stability and corrosive nature is stablized Property, it can be used in ship ocean engineering, tank body, military project or hot environment;In addition to this, the present invention has simplified production work Sequence can cut cold rolling and/or annealing operation, without stretch process hardening is carried out, substantially reduce production cycle, drop Low production cost.

The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those familiar with the art, all answers It is included within the scope of the present invention.Therefore, protection scope of the present invention should be with the scope of protection of the claims It is quasi-.

Claims (8)

  1. It include ingredient, melting, casting, soaking, sawing, milling face, pre- 1. a kind of high-magnesium aluminum alloy state rolls preparation process Heat, hot rolling, which is characterized in that steps are as follows:
    (1) ingredient: being by mass percentage Mg:2.5-7.5%, Si :≤0.45%, Fe :≤0.5%, Cu :≤0.25%, Mn:0.1- 1.2%, Cr :≤0.3%, Zn :≤0.9%, Ti :≤0.2%, Zr :≤0.25%, other are Al and some inevitable impurity members The amount ingredient of element;
    (2) melting, casting: smelting temperature is 720-780 DEG C, melting 4-15h, and holding furnace is entered after melting and is refined, holding temperature It is 700-740 DEG C, soaking time 1.5-10h, obtains ingot casting, ingot casting thickness 300-700mm by 685-730 DEG C of casting temperature;
    (3) soaking: ingot casting carries out twin-stage even heat treatment, and first order heating rate is 40-80 DEG C/h, is warming up to 400-480 DEG C, 1-8h is kept the temperature, second level heating rate is 20-60 DEG C/h, is warming up to 470-550 DEG C, keeps the temperature 5-25h, then cool to room temperature;
    (4) ingot casting sawing, milling face: is subjected to sawing and milling face;
    (5) preheating, hot rolling: the ingot casting after processing is preheated, and preheating temperature is 420-545 DEG C, and the time is 1 ~ 25h;It carries out Hot rolling, when Mg content be more than or equal to 2.5%, less than 3.0% when, finishing temperature be 250-290 DEG C;When Mg content is more than or equal to 3.0%, when less than 4.0%, finishing temperature is 240-280 DEG C;When Mg be more than or equal to 4.0%, less than 4.7% when, finishing temperature is 235-275℃;When Mg content be more than or equal to 4.7%, less than 5.3% when, finishing temperature be 230-260 DEG C;When Mg content be greater than etc. In 5.3%, less than 5.9% when, finishing temperature be 220-255 DEG C;When Mg content be more than or equal to 5.9%, less than 6.3 when, finishing temperature It is 215-250 DEG C;When Mg content is more than or equal to 6.3%, less than 7.5%, finishing temperature is 210-250 DEG C;Plate is cooling after hot rolling Obtain finished product.
  2. 2. high Mg-Al alloy plate preparation process according to claim 1, it is characterised in that: in step (2), cast in melting During making, multi-stage degassing processing is carried out to aluminium alloy melt;The filter plate for choosing 30ppi-40ppi carried out aluminum melt Filter.
  3. 3. high Mg-Al alloy plate preparation process according to claim 1, it is characterised in that: in step (5), hot rolling is used Multi- pass rolling, final passes reduction ratio are 10%-35%.
  4. 4. high Mg-Al alloy plate preparation process according to claim 1, it is characterised in that: in step (5), hot rolling back plate Material is with a thickness of 4-200mm.
  5. 5. high Mg-Al alloy plate preparation process according to claim 1, it is characterised in that: in step (2), smelting temperature It is 725-745 DEG C, melting 5-7h, heat preservation furnace temperature is 715-725 DEG C, soaking time 3.5-4.5h, casting temperature 690-720 ℃。
  6. 6. high Mg-Al alloy plate preparation process according to claim 1, it is characterised in that: in step (3), twin-stage is uniform In heat treatment, first order heating rate is 50-60 DEG C/h, is warming up to 420-460 DEG C, keeps the temperature 2-6h, and second level heating rate is 30-50 DEG C/h, it is warming up to 480-520 DEG C, keeps the temperature 8-18h.
  7. 7. high Mg-Al alloy plate preparation process according to claim 1, it is characterised in that: in step (4), Sawing Process Are as follows: casting head sawing 250-500mm, tail portion 150-400mm, scalping process are as follows: it is 7.5mm-20mm that single side, which mills face amount,.
  8. 8. high Mg-Al alloy plate preparation process according to claim 1, it is characterised in that: in step (5), preheating temperature It is 460-480 DEG C, time 8-10h.
CN201810990296.4A 2018-08-28 2018-08-28 High magnesium aluminum alloy state rolling preparation process CN109332384B (en)

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CN109877181A (en) * 2019-04-17 2019-06-14 广西南南铝加工有限公司 A kind of preparation method of high uniformity aluminum alloy plate materials
CN110241337A (en) * 2019-06-25 2019-09-17 天津忠旺铝业有限公司 A kind of preparation method of super large wide cut aluminum alloy plate materials
CN110358953A (en) * 2019-08-08 2019-10-22 江苏集萃精凯高端装备技术有限公司 A kind of cast aluminium alloy gold and preparation method thereof

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JP2012237035A (en) * 2011-05-11 2012-12-06 Furukawa-Sky Aluminum Corp HIGHLY FORMABLE Al-Mg-BASED ALLOY PLATE AND METHOD OF MANUFACTURING THE SAME
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CN110241337A (en) * 2019-06-25 2019-09-17 天津忠旺铝业有限公司 A kind of preparation method of super large wide cut aluminum alloy plate materials
CN110358953A (en) * 2019-08-08 2019-10-22 江苏集萃精凯高端装备技术有限公司 A kind of cast aluminium alloy gold and preparation method thereof

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