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 PDFInfo
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- 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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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000009413 insulation Methods 0.000 title abstract description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 29
- 238000000137 annealing Methods 0.000 claims abstract description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000005266 casting Methods 0.000 claims abstract description 14
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 11
- 239000011777 magnesium Substances 0.000 claims abstract description 11
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 9
- 239000011572 manganese Substances 0.000 claims abstract description 9
- 238000005097 cold rolling Methods 0.000 claims abstract description 8
- 238000005098 hot rolling Methods 0.000 claims abstract description 8
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 7
- 239000011651 chromium Substances 0.000 claims abstract description 7
- 229910052742 iron Inorganic materials 0.000 claims abstract description 7
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 239000010703 silicon Substances 0.000 claims abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 239000010949 copper Substances 0.000 claims abstract description 6
- 239000010936 titanium Substances 0.000 claims abstract description 6
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 6
- 239000011701 zinc Substances 0.000 claims abstract description 6
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 6
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 4
- 239000000956 alloy Substances 0.000 claims abstract description 4
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 239000002994 raw material Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 34
- 239000004411 aluminium Substances 0.000 claims description 26
- 238000005096 rolling process Methods 0.000 claims description 16
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 14
- 238000007670 refining Methods 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 239000000839 emulsion Substances 0.000 claims description 10
- 229910052786 argon Inorganic materials 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000003801 milling Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 238000009966 trimming Methods 0.000 claims description 5
- 238000003723 Smelting Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 238000009499 grossing Methods 0.000 claims 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 abstract description 2
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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- Metal Rolling (AREA)
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
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.
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