CN103740990A - Aluminum alloy strip for automobile heat insulation cover and manufacturing method thereof - Google Patents

Aluminum alloy strip for automobile heat insulation cover and manufacturing method thereof Download PDF

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Publication number
CN103740990A
CN103740990A CN201410010639.8A CN201410010639A CN103740990A CN 103740990 A CN103740990 A CN 103740990A CN 201410010639 A CN201410010639 A CN 201410010639A CN 103740990 A CN103740990 A CN 103740990A
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aluminium
automobile heat
ingot
aluminium alloy
heat shield
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CN103740990B (en
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吴建新
黄瑞银
邱龙涛
江钟宇
郑智滨
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Chinalco Ruimin Co Ltd
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Chinalco Ruimin Co Ltd
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Abstract

The invention discloses an aluminum alloy strip for an automobile heat insulation cover. The aluminum alloy strip comprises the following components by mass fraction: 0.05-0.15% of iron, 0.05-0.20% of silicon, 0.01-0.15% of copper, 0.20-0.45% of manganese, 4.5-5.0% of magnesium, 0.01-0.10% of chromium, 0.01-0.25% of zinc, 0.01-0.05% of titanium and the balance of aluminum and inevitable impurities. The manufacturing method comprises the following steps: by taking an aluminum ingot, an aluminum intermediate alloy ingot, a magnesium ingot and a manganese agent as raw materials, melting, casting, hot rolling, cold rolling and annealing, so as to prepare the aluminum alloy strip for the automobile heat insulation cover. The aluminum alloy strip for the automobile heat insulation cover obtained by the manufacturing method disclosed by the invention has high strength, good decay resistance, deep drawability, and good strip shape quality.

Description

A kind of Automobile heat shield aluminium alloy strips and manufacture method thereof
Technical field
The invention belongs to non-ferrous metal technical field, be specifically related to a kind of Automobile heat shield aluminium alloy strips and manufacture method thereof.
Background technology
Between cylinder body, vapor pipe and the adjacent component of motor car engine, be provided with steel or fine aluminium matter insulation plate at present.Although steel insulation plate intensity is high than great, heat insulation, resistance audio rate is poor.Although the insulation plate of fine aluminium material is heat insulation, resistance audio fruit has significantly lifting, intensity and corrosion resistance nature are lower.
Summary of the invention
The object of the present invention is to provide a kind of have higher intensity, good corrosion resistance nature and deep drawability, good Automobile heat shield aluminium alloy strips and the manufacture method thereof of strip shape quality.
For achieving the above object, the present invention adopts following technical scheme:
A kind of Automobile heat shield aluminium alloy strips, its composition is by mass percentage: iron 0.05-0.15%, silicon 0.05-0.20%, copper 0.01-0.15%, manganese 0.20-0.45%, magnesium 4.5-5.0%, chromium 0.01-0.10%, zinc 0.01-0.25%, titanium 0.01-0.05%, all the other are aluminium and inevitable impurity.
Above-mentioned Automobile heat shield comprises the following steps by the manufacture method of aluminium alloy strips:
1) each raw material fine aluminium ingot, aluminium intermediate alloy ingot, magnesium ingot, manganese agent are joined in smelting furnace, at the temperature of 720-760 ℃, melt, refining, slagging-off, the aluminium liquid of formation is put into standing furnace after stirring;
2) at the temperature of 690-730 ℃, aluminium liquid is added after grain-refining agent and argon gas refining, the refinery molten aluminium after standing 0.5 hour is cast as to cast aluminium alloy flat ingot by semicontinuous casting method;
3) after flat ingot casting jagsaw head, milling face, entering process furnace heats, Heating temperature is 450-520 ℃, soaking time is 1-8 hour, after coming out of the stove, first ingot blank is rolled into the intermediate blank that 20-26mm is thick through the thick machine of heat, by finishing mill tandem rolling, become the hot rolled band that 2.0-7.0mm is thick again, finishing mill finishing temperature is controlled at 260-340 ℃;
4) on cold rolling, hot rolled band is carried out to cold roughing, every time deflection and general working rate of reasonable arrangement in the operation of rolling, its general working rate is controlled between 20-90%;
5) cold roughing band is carried out to process annealing, annealing temperature is 320-360 ℃, and coiled material, to taking out after warm 1-2 hour, is cooled to normal temperature;
6) band after process annealing is carried out to cold finish rolling, working modulus is controlled between 20-60%;
7) band after straightening is carried out to finished products, annealing temperature is 300-380 ℃, and coiled material, to taking out after warm 1-8 hour, is cooled to normal temperature;
8) band after finished products is carried out to trimming on slitter or itemize becomes needed specification, make Automobile heat shield aluminium alloy strips.
In order to improve the microstructure of aluminium strip and the distributional pattern of second phase particles and structure, improve the quality of aluminium alloy strips, in step 2) in argon gas and the grain-refining agent of use purity >=99.999% be Al-5Ti-0.2B.
In order to guarantee quality and the efficiency of course of hot rolling, in step 3) course of hot rolling in, hot roughing emulsion concentration is controlled at 3.0-6.0%, ash control is below 1000ppm; Hot finishing emulsion concentration is controlled at 5.0-9.0%, and ash control is below 1500ppm.
In order to guarantee that aberration does not appear in aluminium alloy strips surface, in step 5) annealing time, in annealing furnace, be full of nitrogen protection gas, and oxygen content in stove be controlled at below 800ppm.
In order to guarantee the strip shape quality of aluminium alloy strips, in step 7) tension leveling process in, extensibility is controlled at 0.3-0.7%, makes Strip Shape planeness≤10 I (dust).
The invention has the beneficial effects as follows: the present invention is by the optimizing and revising of the alloying elements such as iron, silicon, magnesium, manganese, chromium, guarantee product there is higher-strength in and improve its elongation; By optimizing founding, hot rolling, annealing, cold rolling, straightening technique is manufactured, its finished surface quality is good, plate shape is smooth, corrosion resistance nature and deep drawability good, there is higher-strength; The Automobile heat shield aluminium alloy strips that the present invention produces, yield strength reaches 110-150MPa, and tensile strength reaches 260-300MPa, unit elongation >=22%.
Embodiment
The present invention further illustrates the present invention with the following example, but protection scope of the present invention is not limited to the following example.
Embodiment 1
The composition of aluminium alloy strips is by mass percentage: iron 0.10%, silicon 0.05%, copper 0.01%, manganese 0.45%, magnesium 4.76%, chromium 0.08%, zinc 0.01%, titanium 0.01%, other: 0. 05%, all the other are aluminium, each component concentration is 100% than sum.
A kind of Automobile heat shield with the manufacture method of aluminium alloy strips according to the following steps:
1) at the temperature of 730 ℃, aluminium liquid is added Al-5Ti-0.2B grain-refining agent and uses the argon gas of purity >=99.999% to carry out after refining, will after standing refinery molten aluminium 0.5 hour, be cast as the cast aluminium alloy flat ingot that specification is (thickness: 560mm) * (width: 1310mm) * (length: 8000mm) by low liquid-level type semicontinuous casting method;
2) after flat ingot casting jagsaw head, milling face, entering process furnace heats, Heating temperature is 500 ℃, soaking time is 4 hours, after coming out of the stove, first ingot blank is rolled into the intermediate blank that 26mm is thick through the thick machine of heat, by finishing mill tandem rolling, become the hot rolled band that 6.0mm is thick again, in order to guarantee quality and the efficiency of course of hot rolling, hot roughing emulsion concentration is controlled at 3.0-6.0%, and ash control is below 1000ppm; Hot finishing emulsion concentration is controlled at 5.0-9.0%, and ash control is below 1500ppm, and finishing mill finishing temperature is controlled at 320 ℃;
3) on cold rolling, hot rolled band thick 6.0mm is carried out to cold roughing to 0.9mm thick strip, every time deflection and general working rate of reasonable arrangement in the operation of rolling, its general working rate is 85%;
4) 0.9mm thick strip is carried out to process annealing, annealing temperature is 340 ℃, is full of nitrogen protection gas in stove, and oxygen content in stove is controlled to 800ppm with, coiled material, to temperature, after 2 hours, takes out, and is cooled to normal temperature;
5) the 0.9mm thick strip after annealing is carried out to cold finish rolling thick to 0.5mm, working modulus is 44.4%;
6) 0.5mm thick strip is carried out on stretch bending-straightening machine to tension leveling, extensibility is controlled at 0.7%, makes Strip Shape planeness≤10 I (dust);
7) the 0.5mm thick strip after straightening is carried out to finished products, annealing temperature is 320 ℃, and coiled material takes out after 4 hours to temperature, is cooled to normal temperature;
8) 0.5mm thick strip after finished products is carried out to trimming on slitter or itemize becomes needed specification, make Automobile heat shield aluminium alloy strips of the present invention.
The Automobile heat shield aluminium alloy strips that the present embodiment makes, yield strength is 135MPa, and tensile strength is 290MPa, and unit elongation is 23%, corrosion resistance and good, Strip Shape planeness is 20I.
Embodiment 2
The composition of aluminium alloy strips is by mass percentage: iron 0.15%, silicon 0.10%, copper 0.12%, manganese 0.20%, magnesium 4.5%, chromium 0.10%, zinc 0.02%, titanium 0.015%, other: 0. 05%, all the other are aluminium, each constituent mass per-cent sum is 100%.
1) at the temperature of 690 ℃, aluminium liquid is added Al-5Ti-0.2B grain-refining agent and uses the argon gas of purity >=99.999% to carry out after refining, with low liquid-level type semicontinuous casting method by after standing refinery molten aluminium 1 hour, be cast as specification be (thickness: 560mm) * (width: 1310mm) * (length: 8000mm) cast aluminium alloy flat ingot;
2) after flat ingot casting jagsaw head, milling face, entering process furnace heats, Heating temperature is 450 ℃, soaking time is 8 hours, after coming out of the stove, first ingot blank is rolled into the intermediate blank that 20mm is thick through the thick machine of heat, by finishing mill tandem rolling, become the hot rolled band that 2.0mm is thick again, in order to guarantee quality and the efficiency of course of hot rolling, hot roughing emulsion concentration is controlled at 3.0-6.0%, and ash control is below 1000ppm; Hot finishing emulsion concentration is controlled at 5.0-9.0%, and ash control is below 1500ppm, and finishing mill finishing temperature is controlled at 260 ℃;
3) on cold rolling, hot rolled band thick 2.0mm is carried out to cold roughing to 0.625mm thick strip, every time deflection and general working rate of reasonable arrangement in the operation of rolling, its general working rate is 68.75%;
4) 0.625mm thick strip is carried out to process annealing, annealing temperature is 360 ℃, is full of nitrogen protection gas in stove, and oxygen content in stove is controlled at below 800ppm, and coiled material takes out after 1 hour to temperature, is cooled to normal temperature;
5) the 0.625mm thick strip after annealing is carried out to cold finish rolling thick to 0.5mm, working modulus is 20%;
6) 0.5mm thick strip is carried out on stretch bending-straightening machine to tension leveling, extensibility is controlled at 0.3%, makes Strip Shape planeness≤10 I (dust);
7) the 0.5mm thick strip after straightening is carried out to finished products, annealing temperature is 300 ℃, and coiled material takes out after 1 hour to temperature, is cooled to normal temperature;
8) 0.5mm thick strip after finished products is carried out to trimming on slitter or itemize becomes needed specification, make Automobile heat shield aluminium alloy strips of the present invention.
The Automobile heat shield aluminium alloy strips that the present embodiment makes, yield strength is 110MPa, and tensile strength is 265MPa, and unit elongation is 22%, corrosion resistance and good, Strip Shape planeness is 19I.
Embodiment 3
The composition of aluminium alloy strips is by mass percentage: iron 0.05%, silicon 0.20%, copper 0.15%, manganese 0.30%, magnesium 5.0%, chromium 0.01%, zinc 0.25%, titanium 0.15%, other: 0. 05%, all the other are aluminium, each constituent mass per-cent sum is 100%.
1) at the temperature of 710 ℃, aluminium liquid is added Al-5Ti-0.2B grain-refining agent and uses the argon gas of purity >=99.999% to carry out after refining, with low liquid-level type semicontinuous casting method by after standing refinery molten aluminium 0.7 hour, be cast as specification be (thickness: 560mm) * (width: 1310mm) * (length: 8000mm) cast aluminium alloy flat ingot;
2) after flat ingot casting jagsaw head, milling face, entering process furnace heats, Heating temperature is 520 ℃, soaking time is 1 hour, after coming out of the stove, first ingot blank is rolled into the intermediate blank that 26mm is thick through the thick machine of heat, by finishing mill tandem rolling, become the hot rolled band that 7.0mm is thick again, in order to guarantee quality and the efficiency of course of hot rolling, hot roughing emulsion concentration is controlled at 3.0-6.0%, and ash control is below 1000ppm; Hot finishing emulsion concentration is controlled at 5.0-9.0%, and ash control is below 1500ppm, and finishing mill finishing temperature is controlled at 340 ℃;
3) on cold rolling, hot rolled band thick 7.0mm is carried out to cold roughing to 1.25mm thick strip, every time deflection and general working rate of reasonable arrangement in the operation of rolling, its general working rate is about 82.14%;
4) 1.25mm thick strip is carried out to process annealing, annealing temperature is 360 ℃, is full of nitrogen protection gas in stove, and oxygen content in stove is controlled at below 800ppm, and coiled material takes out after 1.5 hours to temperature, is cooled to normal temperature;
5) the 1.25mm thick strip after annealing is carried out to cold finish rolling thick to 0.5mm, working modulus is 60%;
6) 0.5mm thick strip is carried out on stretch bending-straightening machine to tension leveling, extensibility is controlled at 0.5%, makes Strip Shape planeness≤10 I (dust);
7) the 0.5mm thick strip after straightening is carried out to finished products, annealing temperature is 380 ℃, and coiled material takes out after 8 hours to temperature, is cooled to normal temperature;
8) 0.5mm thick strip after finished products is carried out to trimming on slitter or itemize becomes needed specification, make Automobile heat shield aluminium alloy strips of the present invention.
The Automobile heat shield aluminium alloy strips that the present embodiment makes, yield strength is 145MPa, and tensile strength is 300MPa, and unit elongation is 24%, corrosion resistance and good, Strip Shape planeness is 20I.
The foregoing is only preferred embodiment of the present invention, all equalizations of doing according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.

Claims (7)

1. an Automobile heat shield aluminium alloy strips, it is characterized in that: its composition is counted by massfraction: iron 0.05-0.15%, silicon 0.05-0.20%, copper 0.01-0.15%, manganese 0.20-0.45%, magnesium 4.5-5.0%, chromium 0.01-0.10%, zinc 0.01-0.25%, titanium 0.01-0.05%, surplus is aluminium and inevitable impurity.
2. manufacture the method for Automobile heat shield as claimed in claim 1 aluminium alloy strips for one kind, it is characterized in that: take aluminium ingot, aluminium intermediate alloy ingot, magnesium ingot, manganese agent as raw material, through fusing, casting, hot rolling, cold rolling, annealing, make Automobile heat shield aluminium alloy strips.
3. the manufacture method of aluminium alloy strips for Automobile heat shield according to claim 2, is characterized in that: comprise the following steps:
1) aluminium ingot, aluminium intermediate alloy ingot, magnesium ingot and manganese agent are joined in smelting furnace, at the temperature of 720-760 ℃, melt, refining, slagging-off, the aluminium liquid of formation is put into standing furnace after stirring;
2), at the temperature of 690-730 ℃, toward adding grain-refining agent in aluminium liquid and argon gas carries out after refining, the refinery molten aluminium after standing 0.5 ~ 1 hour is cast as to cast aluminium alloy flat ingot by semicontinuous casting method;
3) after flat ingot casting jagsaw head, milling face, entering process furnace heats, Heating temperature is 450-520 ℃, soaking time is 1-8 hour, after coming out of the stove, first ingot blank is rolled into the intermediate blank that 20-26mm is thick through the thick machine of heat, by finishing mill tandem rolling, become the hot rolled band that 2.0-7.0mm is thick again, finishing mill finishing temperature is controlled at 260-340 ℃;
4) hot rolled band step 3) being obtained on cold rolling carries out cold roughing, and in the operation of rolling, every time general working rate is controlled between 20-90%, makes cold roughing band;
5) cold roughing band is carried out to process annealing, annealing temperature is 320-360 ℃, and coiled material, to taking out after warm 1-2 hour, is cooled to normal temperature;
6) band after process annealing is carried out to cold finish rolling, working modulus is controlled between 20-60%;
7) band through step 6) processing is carried out on stretch bending-straightening machine to tension leveling, carry out finished products, annealing temperature is 300-380 ℃, and coiled material, to taking out after warm 1-8 hour, is cooled to normal temperature;
8) band through step 7) processing is carried out to trimming on slitter or itemize becomes needed specification, make Automobile heat shield aluminium alloy strips.
4. the manufacture method of aluminium alloy strips for Automobile heat shield according to claim 3, is characterized in that: step 2) described in grain-refining agent be Al-5Ti-0.2B, purity >=99.999% of argon gas; Described employing semicontinuous casting method is low liquid-level type semicontinuous casting method.
5. the manufacture method of aluminium alloy strips for Automobile heat shield according to claim 3, is characterized in that: in step 3), and when the thick machine of heat rolls into intermediate blank, emulsion ash control≤1000ppm; During smoothing press tandem rolling, emulsion ash control≤1500ppm.
6. the manufacture method of aluminium alloy strips for Automobile heat shield according to claim 3, is characterized in that: in step 5), during process annealing, in stove, be full of nitrogen protection gas, and by oxygen content control≤800ppm in stove.
7. the manufacture method of aluminium alloy strips for Automobile heat shield according to claim 3, is characterized in that: in step 7) tension leveling process, extensibility is controlled at 0.3-0.7%, makes Strip Shape planeness≤10 dust.
CN201410010639.8A 2014-01-10 2014-01-10 A kind of Aluminum alloy strip for automobile heat insulation cover and manufacture method thereof Active CN103740990B (en)

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CN104313414A (en) * 2014-11-06 2015-01-28 广西柳州银海铝业股份有限公司 Aluminum-magnesium alloy and preparation method of plate of aluminum-magnesium alloy
CN104561696A (en) * 2014-12-22 2015-04-29 河南明泰铝业股份有限公司 5083 aluminum alloy plate for high-speed rail and production method thereof
CN104894442A (en) * 2015-05-05 2015-09-09 山东南山铝业股份有限公司 Aluminum alloy sheet material for vehicles and preparation method thereof
CN105525167A (en) * 2016-02-05 2016-04-27 中铝瑞闽股份有限公司 Aluminum alloy strip for ultrahigh-strength anodic oxidation and preparation method thereof
CN105543741A (en) * 2015-12-17 2016-05-04 西南铝业(集团)有限责任公司 Intermediate annealing process of aluminum alloy and aluminum alloy for automobile covering part
CN106086532A (en) * 2016-06-20 2016-11-09 中铝瑞闽股份有限公司 A kind of capacitor case aluminium alloy strips and preparation method thereof
CN106591645A (en) * 2016-11-30 2017-04-26 中铝瑞闽股份有限公司 Aluminum alloy strip for food packaging special-shaped can and preparation method of aluminum alloy strip
CN107130146A (en) * 2017-06-07 2017-09-05 中铝瑞闽股份有限公司 A kind of capacitor case aluminium alloy strips and preparation method thereof
CN107326311A (en) * 2017-06-07 2017-11-07 中铝瑞闽股份有限公司 A kind of control method of reduction Al Mg line aluminium alloy Strip yield tensile ratios
CN107338376A (en) * 2017-07-11 2017-11-10 中铝瑞闽股份有限公司 A kind of preparation method of aluminium alloy compartment sheet material
CN107475583A (en) * 2017-08-18 2017-12-15 中铝瑞闽股份有限公司 Plate aluminium alloy strips and its manufacture method in a kind of high intensity mobile phone
CN107557625A (en) * 2017-08-29 2018-01-09 河南明泰科技发展有限公司 A kind of new-energy automobile high tenacity Aluminum Plate and Strip and its production method
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CN104313414A (en) * 2014-11-06 2015-01-28 广西柳州银海铝业股份有限公司 Aluminum-magnesium alloy and preparation method of plate of aluminum-magnesium alloy
CN104561696A (en) * 2014-12-22 2015-04-29 河南明泰铝业股份有限公司 5083 aluminum alloy plate for high-speed rail and production method thereof
CN104894442A (en) * 2015-05-05 2015-09-09 山东南山铝业股份有限公司 Aluminum alloy sheet material for vehicles and preparation method thereof
CN105543741A (en) * 2015-12-17 2016-05-04 西南铝业(集团)有限责任公司 Intermediate annealing process of aluminum alloy and aluminum alloy for automobile covering part
CN105525167A (en) * 2016-02-05 2016-04-27 中铝瑞闽股份有限公司 Aluminum alloy strip for ultrahigh-strength anodic oxidation and preparation method thereof
CN106086532A (en) * 2016-06-20 2016-11-09 中铝瑞闽股份有限公司 A kind of capacitor case aluminium alloy strips and preparation method thereof
CN106591645A (en) * 2016-11-30 2017-04-26 中铝瑞闽股份有限公司 Aluminum alloy strip for food packaging special-shaped can and preparation method of aluminum alloy strip
CN106591645B (en) * 2016-11-30 2018-04-27 中铝瑞闽股份有限公司 A kind of packaging for foodstuff irregular shaped can aluminium alloy strips and preparation method thereof
CN107130146A (en) * 2017-06-07 2017-09-05 中铝瑞闽股份有限公司 A kind of capacitor case aluminium alloy strips and preparation method thereof
CN107326311A (en) * 2017-06-07 2017-11-07 中铝瑞闽股份有限公司 A kind of control method of reduction Al Mg line aluminium alloy Strip yield tensile ratios
CN107338376A (en) * 2017-07-11 2017-11-10 中铝瑞闽股份有限公司 A kind of preparation method of aluminium alloy compartment sheet material
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