CN102634701B - Production method of high-magnesium aluminum alloy sheet for ship - Google Patents
Production method of high-magnesium aluminum alloy sheet for ship Download PDFInfo
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Abstract
The present invention relates to a production method of a high-magnesium aluminum alloy sheet, especially a production method of a high-magnesium aluminum alloy sheet for ship, which mainly solves the technical problems in the prior art that: when the existing aluminum alloy is applied to load-bearing structures such as decks, side plates, bottom planks and tie plates of a steamship, the working environment is very bad, the temperature acutely varies, the electrolyte corrosion is serious, and huge sea beat needs to be borne, therefore the great threaten is brought to the use safety of the aluminum alloy ship body. The production method comprises the following steps: casting, homogenzing, heating, hot rolling, intermediate annealing, cold rolling, stabilizing, straightening, cutting, accepting, checking and packing.
Description
Technical field
The present invention relates to a kind of high Mg-Al alloy plate production method, especially relate to a kind of high Mg-Al alloy plate production method peculiar to vessel.
Background technology
The aluminium alloy fusing point is low, good mechanical property, thereby is widely used in industry.Mainly be used in five aspects with the foundry goods of this alloy system manufacture: the one, the member class, as the accessory for papermaking equipment, textile manufacturing machine, brickmaking mechanical, road building machine, metallurgical machinery, hoisting machinery, printing machinery, plastics machinery and mining machinery etc.; The 2nd, bearing shell, bearing, slide plate and slide block etc.; The 3rd, automobile, tractor, boats and ships accessory; The 4th, the mould class, as draw mould, blow die, die set, blanking mould; The 5th, art.Chinese patent discloses a kind of novel casting aluminum alloy (publication number: CN101748316A), it comprises by weight percentage: the Ti of Ni, the 0.08-0.18% of Mg, the 2-3.5% of the Si of 11-13%, the Cu of 2-4%, 0.5-1.2% and the V of 0.1-0.2%, and all the other are aluminium ingot; Its preparation method comprises: a, by after the smelting furnace drying, get the copper of 2-4% and the nickel of 2-3.5% is put into smelting furnace by proportioning claimed in claim 1, and continue to heat up, melt to copper and mickel; B, add aluminium ingot: first drop into 1/2nd aluminium ingot, continue heating, add 1/2nd remaining aluminium ingots after melting; C, when aluminium ingot all is melted to molten state, add the silicon grain of 11-13% by proportioning claimed in claim 1, stir, make silicon grain surface aluminium coating liquid fully; D, heat temperature raising, control fire box temperature at 850 ℃-900 ℃, when liquation becomes safran, with the slag wooden dipper, fully stirs, and after confirming that silicon grain and copper nickel all melt, is controlled at 850 ℃ and is incubated 1.5-2 hour; Add 0.5-1.2% MAG block and 0.08-0.18% titanium, 0.1-0.2% vanadium after e, insulation, wherein titanium and vanadium add with the form of aluminum titanium alloy and aluminium alum alloy, and titanium and the ratio of vanadium in aluminum titanium alloy and aluminium alum alloy can not change, separately add the 0.2-0.4% agent of slagging tap, after 10-15 minute, stir aluminium liquid, reaffirm that silicon, copper, nickel and the magnesium in aluminium liquid all melts, stir; F, finally carry out refining, rotten and degassing processing, can complete the preparation of novel casting aluminum alloy of the present invention.But this aluminium alloy is applied to deck, strake, the bottom strake of steamer, while strangling the load-bearing structural members such as plate, Working environment is very severe, temperature variation is violent, electrolyte corrosion seriously, also will bear huge sea beaten, thereby the use of aluminum-alloy hull is formed safely to great threat.
Summary of the invention
The present invention is to provide a kind of high Mg-Al alloy plate production method peculiar to vessel, its be mainly solve deck, strake, bottom strake that the existing aluminium alloy of prior art is applied to steamer, while strangling the load-bearing structural member such as plate, Working environment is very severe, temperature variation is violent, electrolyte corrosion seriously, also will bear huge sea beaten, thereby the use of aluminum-alloy hull is formed safely to the technical problem of great threat etc.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals:
A kind of high Mg-Al alloy plate production method peculiar to vessel of the present invention is characterized in that described method comprises:
A. cast out the high-magnesium aluminum alloy blank in smelting furnace, wherein the mass percent of high-magnesium aluminum alloy blank each component is: Si 0.1-0.3%, Fe0.05-0.2%, Cu0.01-0.08%, Mg4.0-4.9%, Mn0.4-1.0%, Cr0.05-0.25%, Zn0.05-0.20%, Ti0.01-0.10%, impurity 0.01-0.12%, all the other are Al;
Low-alloyed plasticity can fall in silicon, and in iron and alloy, other element reaction forms the hard embrittlement compound of indissoluble, not only easily causes rolling crack, and falls low-alloyed solidity to corrosion, therefore will strictly control the content of silicon, iron; The copper of trace will make the solidity to corrosion variation of alloy, so content must remove the limit; Manganese, chromium can improve the solidity to corrosion of alloy, especially can improve the anticorrosion stress-resistant performance, so addition can suitably increase; The crystal grain of titanium energy refinement alloy, make to produce may diminishing of stress concentration, improves the Alloy Anti stress corrosion performance, so the add-on capping.
B. the high-magnesium aluminum alloy blank is put in the equal stove of resistance and carried out all fire processing, all fire is heated after handling;
But regional segregation and grain segregation in equal fire decrease alloy, make organizing of finished product sheet material more even, part is eliminated due to the uneven intracrystalline formed of composition and the microstress of intergranular, while being subject to external force, organization internal is stressed more even, reduce the danger that forms stress concentration, increase the ability of stress corrosion resistant.
C. the high-magnesium aluminum alloy blank after heating is put in 1850 hot rollss and is rolled, and use emulsion to be lubricated and cooling, the multiple that each draught is 5mm, the number of times of depressing is more than 20 times, and each draught according to increasing-quantitatively-order of reducing arranges, be rolled into high Mg-Al alloy plate, then use emulsion or air compressor machine to force cooling, require speed of cooling to reach 3 ℃/min;
Lubricating grease in emulsion, organic acid can increase the lubricity of emulsion, improve oil film thickness and intensity, increase the film forming tendency, prevent sticky aluminium when high temperature rolling; Can make emulsion fluff, the emulsion particle increases, and improves cooling performance simultaneously.Organic soap can improve the pH value of emulsion, increases cooling and wetting function.Can cause the emulsion tension when emulsifying agent addition is large, affect the lubricant effect of emulsion.The present invention takes high temperature rolling, and oilness and the cooling power of emulsion had to higher requirement, therefore, lubricating grease, organic acid, organic soap content capping in emulsion, the content of emulsifying agent removes the limit.
D. high Mg-Al alloy plate is put in annealing furnace and carried out process annealing, the rear pressure of coming out of the stove is cooling, requires speed of cooling to reach 2 ℃/min;
In c, d step, require to be rapidly heated, fast cooling.Be rapidly heated and can improve the nucleation rate of c step interalloy, the abnormal grain growth of avoiding heating up and causing slowly; The alloy that magnesium content is higher, the bad stability of sosoloid is closed in its satiety, Mg2Al3 is easy to separate out from matrix mutually, therefore adopt fast cooling in step c, d, be retained in Mg2Al3 mutually in sosoloid to greatest extent, can play strengthening effect, can avoid again due to Mg2Al3 at the caused stress concentration of separating out of intracrystalline and crystal boundary.
E. by annealing after high Mg-Al alloy plate put in 1850 cold-rolling mills, carry out cold rolling;
F. cold rolling high Mg-Al alloy plate is later carried out can going out finished product after stabilization treatment, aligning, sawing more successively.
Stabilization treatment can make the precipitate in microstructure be fine granularity to be distributed in equably on intracrystalline and crystal boundary, prevents that macrobead Mg2Al3 from concentrating and separating out mutually, avoids the age softening effect and produces stress concentration.
As preferably, the constant temperature that in described step b, all fire is processed is 520 ℃, and heat-up rate is 5 ℃/min, and holding temperature is 500-520 ℃, and soaking time is 24h; Constant temperature during heating is 490 ℃, and holding temperature is 470-490 ℃, and soaking time is 12h, and tapping temperature is 470-490 ℃.
As preferably, in described step c in emulsion lubricated oil composition and mass percent be: lubricating grease 20-21%, free acid 5-6%, organic soap 10-11%, emulsifying agent 7-7.5%, all the other are water; The temperature of emulsion is 55-60 ℃, and the pH value is 8.0-8.2, and specific conductivity is 200-220 μ s/cm.
As preferably, in described step c, the rolling finishing temperature is 400-420 ℃.
As preferably, in described steps d, process annealing comprises heating, during heating for the first time constant temperature be 500 ℃, heat-up rate is 3 ℃/min, be 3h heat-up time; After heating, be incubated, during insulation for the second time constant temperature be 420 ℃, soaking time is 2h, the temperature of high Mg-Al alloy plate is 400-420 ℃.
As preferably, working modulus cold rolling in described step e is at 30-35%, and cold rolling speed is more than 150m/min.
As preferably, in described step f, stabilization treatment comprises heating, during heating for the first time constant temperature be 200 ℃, heat-up rate is 3 ℃/min, be 1h heat-up time; After heating, be incubated, during insulation for the second time constant temperature be 130 ℃, soaking time is 2h, the temperature of high Mg-Al alloy plate is 110-120 ℃; Then force coolingly, speed of cooling reaches 2 ℃/min.
The characteristics such as therefore, the present invention has intergranular throw out in mirco structure and is the not continuous spot distribution in limit, can bear huge sea beaten, and corrosion resistance nature is stronger.
Embodiment
Below by embodiment, technical scheme of the present invention is described in further detail.
Embodiment: the high Mg-Al alloy plate production method a kind of peculiar to vessel of this example the steps include:
A. cast out the high-magnesium aluminum alloy blank in smelting furnace, wherein the mass percent of high-magnesium aluminum alloy blank each component is: Si0.12%, and Fe0.08%, Cu0.06%, Mg4.51%, Mn0.82%, Cr0.22%, Zn0.18%, Ti0.06%, impurity 0.13%, all the other are Al;
Its performance is as following table:
| σ b,MPa | σ 0.2,MPa | δ,%(5D) | Peeling Corrosion | Intergranular corrosion |
| 305~385 | 215~295 | 10 | Be better than PB | Mass loss is less than 15mg/cm 2 |
B. the high-magnesium aluminum alloy blank is put in the equal stove of resistance and carried out all fire processing, the constant temperature that all fire is processed is 520 ℃, and heat-up rate is 5 ℃/min, and holding temperature is 500-520 ℃, and soaking time is 24h; All fire is heated after handling, and constant temperature during heating is 490 ℃, and holding temperature is 470-490 ℃, and soaking time is 12h, and tapping temperature is 470-490 ℃;
C. the high-magnesium aluminum alloy blank after heating is put in 1850 hot rollss and is rolled, the multiple that each draught is 5mm, the number of times of depressing is more than 20 times, and each draught according to increasing-quantitatively-order of reducing arranges, be rolled into high Mg-Al alloy plate, concrete each draught is as following table:
Then use emulsion to be forced cooling, in emulsion, lubricated oil composition and mass percent are: lubricating grease 20.8%, and free acid 5.87%, organic soap 10.75%, emulsifying agent 7.01%, all the other are water; The temperature of emulsion is 55-60 ℃, and the pH value is 8.0-8.2, and specific conductivity is 200-220 μ s/cm, requires speed of cooling to reach 3 ℃/min, and the rolling finishing temperature is 400-420 ℃;
D. high Mg-Al alloy plate is put in annealing furnace and carried out process annealing, process annealing comprises heating, during heating for the first time constant temperature be 500 ℃, heat-up rate is 3 ℃/min, be 3h heat-up time; After heating, be incubated, during insulation for the second time constant temperature be 420 ℃, soaking time is 2h, the temperature of high Mg-Al alloy plate is 400-420 ℃; The rear pressure of coming out of the stove is cooling, requires speed of cooling to reach 2 ℃/min;
E. the high Mg-Al alloy plate after annealing is put into and carried out cold rolling, cold rolling working modulus in cold-rolling mill at 30-35%, cold rolling speed is more than 150m/min;
F. cold rolling high Mg-Al alloy plate is later carried out to stabilization treatment more successively, stabilization treatment comprises heating, during heating for the first time constant temperature be 200 ℃, heat-up rate is 3 ℃/min, be 1h heat-up time; After heating, be incubated, during insulation for the second time constant temperature be 130 ℃, soaking time is 2h, the temperature of high Mg-Al alloy plate is 110-120 ℃; Then force coolingly, speed of cooling reaches 2 ℃/min; Finally aligned, can be gone out finished product after sawing.
The foregoing is only specific embodiments of the invention, but constitutional features of the present invention is not limited to this, any those skilled in the art is in the field of the invention, and the variation of doing or modification all are encompassed among the scope of the claims of the present invention.
Claims (1)
1. a high Mg-Al alloy plate production method peculiar to vessel is characterized in that described method comprises:
A. cast out the high-magnesium aluminum alloy blank in smelting furnace, wherein the mass percent of high-magnesium aluminum alloy blank each component is: Si 0.1-0.3%, Fe 0.05-0.2%, Cu0.01-0.08%, Mg4.0-4.9%, Mn0.4-1.0%, Cr0.05-0.25%, Zn0.05-0.20%, Ti0.01-0.10%, impurity 0.01-0.12%, all the other are Al;
B. the high-magnesium aluminum alloy blank is put in the equal stove of resistance and carried out all fire processing, the constant temperature that all fire is processed is 520 ℃, and heat-up rate is 5 ℃/min, and holding temperature is 500-520 ℃, and soaking time is 24h; Constant temperature during heating is 490 ℃, and holding temperature is 470-490 ℃, and soaking time is 12h, and tapping temperature is 470-490 ℃, and all fire is heated after handling;
C. the high-magnesium aluminum alloy blank after heating is put in 1850 hot rollss and is rolled, and use emulsion to be lubricated with cooling, in emulsion, lubricated oil composition and mass percent are: lubricating grease 20-21%, free acid 5-6%, organic soap 10-11%, emulsifying agent 7-7.5%, all the other are water; The temperature of emulsion is 55-60 ℃, the pH value is 8.0-8.2, specific conductivity is 200-220 μ s/cm, the multiple that each draught is 5mm, the number of times of depressing is more than 20 times, and each draught according to increasing-quantitatively-order of reducing arranges, be rolled into high Mg-Al alloy plate, the rolling finishing temperature is 400-420 ℃, then uses emulsion or air compressor machine to force cooling, requires speed of cooling to reach 3 ℃/min;
D. high Mg-Al alloy plate is put in annealing furnace and carried out process annealing, process annealing comprises heating, during heating for the first time constant temperature be 500 ℃, heat-up rate is 3 ℃/min, be 3h heat-up time; After heating, be incubated, during insulation for the second time constant temperature be 420 ℃, soaking time is 2h, the temperature of high Mg-Al alloy plate is 400-420 ℃, the rear pressure of coming out of the stove is cooling, requires speed of cooling to reach 2 ℃/min;
E. the high Mg-Al alloy plate after annealing is put into and carried out cold rolling, cold rolling working modulus in 1850 cold-rolling mills at 30-35%, cold rolling speed is more than 150m/min;
F. cold rolling high Mg-Al alloy plate is later carried out can going out finished product after stabilization treatment, aligning, sawing more successively, wherein stabilization treatment comprises heating, during heating for the first time constant temperature be 200 ℃, heat-up rate is 3 ℃/min, be 1 heat-up time; After heating, be incubated, during insulation for the second time constant temperature be 130 ℃, soaking time is 2h, the temperature of high Mg-Al alloy plate is 110-120 ℃; Then force coolingly, speed of cooling reaches 2 ℃/min.
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| CN201210064083.1A CN102634701B (en) | 2012-03-13 | 2012-03-13 | Production method of high-magnesium aluminum alloy sheet for ship |
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| US9601978B2 (en) * | 2013-04-26 | 2017-03-21 | GM Global Technology Operations LLC | Aluminum alloy rotor for an electromagnetic device |
| CN103740990B (en) * | 2014-01-10 | 2016-01-20 | 中铝瑞闽股份有限公司 | A kind of Aluminum alloy strip for automobile heat insulation cover and manufacture method thereof |
| CN103817495B (en) * | 2014-03-05 | 2016-06-08 | 浙江巨科实业股份有限公司 | Manufacturing method of aluminum alloy hub |
| CN103990947A (en) * | 2014-06-13 | 2014-08-20 | 浙江巨科实业有限公司 | Manufacturing method for Al-Mg alloy hub |
| CN104015005A (en) * | 2014-06-13 | 2014-09-03 | 浙江巨科实业有限公司 | Manufacturing method of commercial high-magnesium aluminum alloy wheel hubs |
| CN104561695B (en) * | 2014-12-22 | 2016-10-05 | 河南明泰铝业股份有限公司 | Marine aluminium alloy slab and production method thereof |
| CN106734786A (en) * | 2016-12-30 | 2017-05-31 | 西南铝业（集团）有限责任公司 | A kind of method of high-magnesium aluminum alloy ring rolling |
| CN107338376B (en) * | 2017-07-11 | 2019-02-22 | 中铝瑞闽股份有限公司 | A kind of preparation method of aluminium alloy compartment plate |
| US20190055637A1 (en) * | 2017-08-21 | 2019-02-21 | Novelis Inc. | Aluminum alloy products having selectively recrystallized microstructure and methods of making |
| CN109048222B (en) * | 2018-09-04 | 2020-08-14 | 浙江永杰铝业有限公司 | Production method of 3005-H16 aluminum alloy plate strip |
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| CN100482829C (en) * | 2007-04-29 | 2009-04-29 | 东北轻合金有限责任公司 | Manufacturing method of aluminum alloy plate for train compartment |
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