WO2021248765A1 - 一种热浸镀锌铝镁镀层钢板及其制造方法 - Google Patents
一种热浸镀锌铝镁镀层钢板及其制造方法 Download PDFInfo
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- WO2021248765A1 WO2021248765A1 PCT/CN2020/121167 CN2020121167W WO2021248765A1 WO 2021248765 A1 WO2021248765 A1 WO 2021248765A1 CN 2020121167 W CN2020121167 W CN 2020121167W WO 2021248765 A1 WO2021248765 A1 WO 2021248765A1
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- steel sheet
- magnesium
- aluminum
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 222
- 239000010959 steel Substances 0.000 title claims abstract description 222
- -1 zinc-aluminum-magnesium Chemical compound 0.000 title abstract description 30
- 238000004519 manufacturing process Methods 0.000 title description 5
- 238000000576 coating method Methods 0.000 claims abstract description 98
- 239000011248 coating agent Substances 0.000 claims abstract description 97
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 93
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 72
- 230000007797 corrosion Effects 0.000 claims abstract description 72
- 238000005260 corrosion Methods 0.000 claims abstract description 72
- 239000011777 magnesium Substances 0.000 claims abstract description 70
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 68
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 67
- 239000011701 zinc Substances 0.000 claims abstract description 48
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 41
- 238000001816 cooling Methods 0.000 claims abstract description 37
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000000126 substance Substances 0.000 claims abstract description 28
- 239000012535 impurity Substances 0.000 claims abstract description 26
- 238000002844 melting Methods 0.000 claims abstract description 7
- 230000008018 melting Effects 0.000 claims abstract description 7
- 238000007747 plating Methods 0.000 claims description 84
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims description 40
- 239000000203 mixture Substances 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 22
- 239000011247 coating layer Substances 0.000 claims description 14
- 239000011575 calcium Substances 0.000 claims description 9
- 229910052791 calcium Inorganic materials 0.000 claims description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 4
- 230000003746 surface roughness Effects 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 abstract description 17
- 238000002360 preparation method Methods 0.000 abstract description 11
- 239000007788 liquid Substances 0.000 abstract description 8
- 238000007598 dipping method Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 65
- 238000012360 testing method Methods 0.000 description 43
- 239000010410 layer Substances 0.000 description 30
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 16
- 229910001425 magnesium ion Inorganic materials 0.000 description 16
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 239000011241 protective layer Substances 0.000 description 6
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 5
- 239000001095 magnesium carbonate Substances 0.000 description 5
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 4
- 229910018137 Al-Zn Inorganic materials 0.000 description 3
- 229910018573 Al—Zn Inorganic materials 0.000 description 3
- 210000001787 dendrite Anatomy 0.000 description 3
- 238000003618 dip coating Methods 0.000 description 3
- 230000005496 eutectics Effects 0.000 description 3
- 238000005246 galvanizing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- 229910019440 Mg(OH) Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 229940031958 magnesium carbonate hydroxide Drugs 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- UOURRHZRLGCVDA-UHFFFAOYSA-D pentazinc;dicarbonate;hexahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Zn+2].[Zn+2].[Zn+2].[Zn+2].[Zn+2].[O-]C([O-])=O.[O-]C([O-])=O UOURRHZRLGCVDA-UHFFFAOYSA-D 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000011592 zinc chloride Substances 0.000 description 2
- 235000005074 zinc chloride Nutrition 0.000 description 2
- 229910018626 Al(OH) Inorganic materials 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 125000005587 carbonate group Chemical group 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000010944 pre-mature reactiony Methods 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- UGZADUVQMDAIAO-UHFFFAOYSA-L zinc hydroxide Chemical compound [OH-].[OH-].[Zn+2] UGZADUVQMDAIAO-UHFFFAOYSA-L 0.000 description 1
- 229940007718 zinc hydroxide Drugs 0.000 description 1
- 229910021511 zinc hydroxide Inorganic materials 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
- C22C18/04—Alloys based on zinc with aluminium as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
- C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
- C23C2/29—Cooling or quenching
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
Definitions
- the mass fraction of magnesium and aluminum in the coating can be controlled according to the thickness of the steel sheet, which specifically includes: when 0.5mm ⁇ the thickness of the steel sheet ⁇ 2mm, the mass fraction of the chemical composition of the coating can be: aluminum 2%-12%, magnesium 1%-4%, the rest is zinc and unavoidable impurities; when 2mm ⁇ the thickness of the steel plate ⁇ 4mm, the mass fraction of the chemical composition of the coating can be: aluminum 3%-12%, Magnesium 1.5% ⁇ 4%, the rest is zinc and unavoidable impurities; when 4mm ⁇ the thickness of the steel plate ⁇ 5mm, the mass fraction of the chemical composition of the coating can be: aluminum 4%-12%, magnesium 2%-4% , The rest are zinc and unavoidable impurities; when 5mm ⁇ the thickness of the steel sheet ⁇ 6mm, the mass fraction of the chemical composition of the coating can be: aluminum 6%-12%, magnesium 3%-4%, and the rest zinc and inevitable Impurities to avoid.
- the surface roughness Ra of the obtained steel sheet may be 1 ⁇ m to 2 ⁇ m.
- the rough morphology of the steel sheet surface is beneficial to improve the adhesion between the coating and the steel sheet, and to improve the corrosion resistance of the coating during the corrosion process, and it is not easy to peel off the coating. If the surface of the steel sheet is too rough, the following adverse effects will occur: the local coating will be significantly thinned, and the corrosion resistance of the coating will decrease; the rough peaks of the steel plate during hot-dip coating will react quickly to form an excessively thick Fe-Al-Zn compound The layer will consume aluminum in the plating solution, causing the corrosion resistance of the plating layer to decrease due to insufficient aluminum in the plating layer. Therefore, in some embodiments of the present disclosure, the surface roughness Ra of the obtained steel sheet may be limited to not more than 2.0 ⁇ m and not less than 1.0 ⁇ m.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Thermal Sciences (AREA)
- Coating With Molten Metal (AREA)
Abstract
Description
组别 | 预热镀液的温度 | 预热钢板的温度 | 钢板粗糙度 | 第一冷却速度 | 第二冷却速度 |
℃ | ℃ | 微米 | ℃/s | ℃/s | |
试验组1 | 420 | 420 | 1 | 0.5 | 10 |
试验组2 | 440 | 440 | 1.2 | 0.1 | 12 |
试验组3 | 430 | 430 | 1.3 | 0.4 | 12 |
试验组4 | 450 | 445 | 1.5 | 0.2 | 10 |
试验组5 | 500 | 495 | 1.9 | 0.8 | 5 |
试验组6 | 410 | 408 | 2 | 1 | 8 |
试验组7 | 440 | 430 | 2 | 0.1 | 10 |
试验组8 | 450 | 445 | 1.2 | 0.2 | 12 |
试验组9 | 490 | 487 | 1.9 | 0.9 | 12 |
试验组10 | 500 | 496 | 1.9 | 0.3 | 10 |
试验组11 | 400 | 390 | 1 | 0.9 | 5 |
试验组12 | 400 | 393 | 2 | 0.9 | 8 |
试验组13 | 450 | 445 | 1.3 | 0.1 | 12 |
试验组14 | 430 | 420 | 1.2 | 0.2 | 5 |
试验组15 | 430 | 420 | 1.8 | 0.2 | 11 |
试验组16 | 450 | 440 | 1.9 | 0.8 | 10 |
试验组17 | 450 | 440 | 2 | 0.03 | 8 |
对比组1 | 460 | 460 | 0.8 | 1.2 | 3 |
对比组2 | 470 | 480 | 0.8 | 0.3 | 8 |
对比组3 | 430 | 450 | 1.2 | 3 | 10 |
对比组4 | 510 | 510 | 1.2 | 0.4 | 12 |
对比组5 | 520 | 500 | 1.5 | 0.8 | 12 |
对比组6 | 430 | 440 | 2.1 | 0.2 | 2 |
对比组7 | 500 | 460 | 2.3 | 0.2 | 12 |
对比组8 | 550 | 500 | 4.3 | 5 | 9 |
对比组9 | 590 | 500 | 2.1 | 5 | 3 |
对比组10 | 450 | 450 | 2.9 | 0.2 | 12 |
对比组11 | 430 | 450 | 1.2 | 0.8 | 12 |
对比组12 | 470 | 460 | 1.9 | 0.2 | 2 |
组别 | 红锈面积比例(%) | 镀层剥落比例(%) |
试验组1 | 1 | 0 |
试验组2 | 3 | 0 |
试验组3 | 2 | 0 |
试验组4 | 0 | 0 |
试验组5 | 0 | 0 |
试验组6 | 0 | 0 |
试验组7 | 1 | 0 |
试验组8 | 3 | 0 |
试验组9 | 2 | 0 |
试验组10 | 2 | 0 |
试验组11 | 2 | 0 |
试验组12 | 0 | 0 |
试验组13 | 0 | 0 |
试验组14 | 0 | 0 |
试验组15 | 0 | 0 |
试验组16 | 0 | 0 |
试验组17 | 0 | 0 |
对比组1 | 12 | 2 |
对比组2 | 17 | 2 |
对比组3 | 15 | 0 |
对比组4 | 10 | 0 |
对比组5 | 18 | 0 |
对比组6 | 20 | 4 |
对比组7 | 14 | 5 |
对比组8 | 20 | 10 |
对比组9 | 21 | 10 |
对比组10 | 20 | 0 |
对比组11 | 34 | 0 |
对比组12 | 23 | 0 |
Claims (10)
- 一种具有切口耐蚀性的热浸镀锌铝镁镀层钢板,包括钢板和镀层;所述镀层的化学成分质量分数为:铝2%~12%,镁1%~4%,其余为锌和不可避免的杂质;且所述铝的质量分数是所述镁的质量分数的2~3倍;所述镀层的厚度不小于所述钢板的厚度的5‰。
- 根据权利要求1所述的具有切口耐蚀性的热浸镀锌铝镁镀层钢板,其中所述钢板的厚度范围为0.5mm-6mm。
- 根据权利要求1或2所述的具有切口耐蚀性的热浸镀锌铝镁镀层钢板,其中根据钢板的厚度控制所述镀层中的镁和铝的质量分数,具体包括:当0.5mm≤钢板的厚度≤2mm时,所述镀层的化学成分质量分数为:铝2%~12%,镁1%~4%,其余为锌和不可避免的杂质;当2mm<钢板的厚度≤4mm时,所述镀层的化学成分质量分数为:铝3%~12%,镁1.5%~4%,其余为锌和不可避免的杂质;当4mm<钢板的厚度≤5mm时,所述镀层的化学成分质量分数为:铝4%~12%,镁2%~4%,其余为锌和不可避免的杂质;当5mm<钢板的厚度≤6mm时,所述镀层的化学成分质量分数为:铝6%~12%,镁3%~4%,其余为锌和不可避免的杂质。
- 根据权利要求1所述的具有切口耐蚀性的热浸镀锌铝镁镀层钢板,其中所述镀层的化学成分质量分数为:铝2~12%,镁1~4%,钙0.01%~0.1%,其余为锌和不可避免的杂质;且所述铝的质量分数是镁的质量分数的2~3倍;所述镀层的厚度不小于所述钢板的厚度的5‰。
- 根据权利要求4所述的具有切口耐蚀性的热浸镀锌铝镁镀层钢板,其中所述钙的质量分数为0.01%时,根据钢板的厚度控制镀层中的镁和铝的质量分数,具体包括:当0.5mm≤钢板的厚度≤2.5mm时,所述镀层的化学成分质量分数为:铝2%~12%,镁1%~4%,其余为锌和不可避免的杂质;当2.5mm<钢板的厚度≤4mm时,所述镀层的化学成分质量分数为:铝2.5%~12%,镁1.2%~4%,其余为锌和不可避免的杂质;当4mm<钢板的厚度≤5mm时,所述镀层的化学成分质量分数为:铝3.8%~12%,镁1.8%~4%,其余为锌和不可避免的杂质;当5mm<钢板的厚度≤6mm时,所述镀层的化学成分质量分数为:铝5%~12%,镁2.5%~4%,其余为锌和不可避免的杂质。
- 如权利要求1-5中任一项所述的具有切口耐蚀性的热浸镀锌铝镁镀层钢板的制备方法,包括:采用权利要求1-5中任一项所述的具有切口耐蚀性的热浸镀锌铝镁镀层钢板的所述镀层的化学成分获得镀液;将所述镀液加热以获得预热镀液,所述预热镀液的温度控制为不低于所述镀液的熔点,同时不高于500℃;获得钢板,将所述钢板浸入所述预热镀液中以获得带有镀层的钢板;以及将所述带有镀层的钢板冷却以获得具有切口耐蚀性的热浸镀锌铝镁镀层钢板。
- 根据权利要求6所述的具有切口耐蚀性的热浸镀锌铝镁镀层钢板的制备方法,其中,所述将所述带有镀层的钢板冷却,包括:当所述带有镀层的钢板的温度为镀浴温度到360℃之间,以第一冷却速度进行冷却,所述第一冷却速度控制在:0<冷却速度≤1℃/s;当所述带有镀层的钢板的温度在360℃~300℃之间,以第二冷却速度进行冷却,所述第二冷却速度≥5℃/s。
- 根据权利要求6所述的具有切口耐蚀性的热浸镀锌铝镁镀层钢板的制备方法,其中,所述将所述钢板浸入所述镀液中镀浴之前,先将所述钢板预热到钢板预热温度,所述钢板预热温度的范围为所述预热镀液的温度±10℃。
- 根据权利要求6所述的具有切口耐蚀性的热浸镀锌铝镁镀层钢板的制备方法,其中,所述将所述钢板浸入所述镀液中镀浴之前,先将所述钢板预热到钢板预热温度,所述钢板预热温度根据钢板的厚度进行控制,具体包括:当0.5mm≤钢板的厚度≤2mm时,所述预热镀液的温度≤钢板预热温度≤所述预热镀液的温度+10℃;当2mm<钢板的厚度≤4mm时,所述预热镀液的温度-5℃≤钢板预热温度≤所述预热镀液的温度;当4mm<钢板的厚度≤6mm时,所述预热镀液的温度-10℃≤钢板预热温度≤所述预热镀液的温度-5℃。
- 根据权利要求6所述的具有切口耐蚀性的热浸镀锌铝镁镀层钢板的制备方法,其中,所述获得钢板,包括:获得表面粗糙度Ra为1μm~2μm的钢板。
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