CN112647035A - Hot galvanizing alloy for galvanizing narrow-band steel and preparation method thereof - Google Patents
Hot galvanizing alloy for galvanizing narrow-band steel and preparation method thereof Download PDFInfo
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- 239000000956 alloy Substances 0.000 title claims abstract description 79
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 77
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 49
- 239000010959 steel Substances 0.000 title claims abstract description 49
- 238000005246 galvanizing Methods 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 56
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 55
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000011701 zinc Substances 0.000 claims abstract description 47
- 229910052751 metal Inorganic materials 0.000 claims abstract description 42
- 239000002184 metal Substances 0.000 claims abstract description 40
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 40
- 238000002156 mixing Methods 0.000 claims abstract description 31
- 229910001297 Zn alloy Inorganic materials 0.000 claims abstract description 29
- 238000002844 melting Methods 0.000 claims abstract description 29
- 230000008018 melting Effects 0.000 claims abstract description 29
- 229910000861 Mg alloy Inorganic materials 0.000 claims abstract description 26
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 20
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000010703 silicon Substances 0.000 claims abstract description 19
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 19
- 239000002893 slag Substances 0.000 claims abstract description 19
- 238000003756 stirring Methods 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 238000007747 plating Methods 0.000 claims abstract description 4
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 14
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 14
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 7
- 235000019270 ammonium chloride Nutrition 0.000 claims description 7
- 229910001610 cryolite Inorganic materials 0.000 claims description 7
- 229910052746 lanthanum Inorganic materials 0.000 claims description 7
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 7
- 229910052749 magnesium Inorganic materials 0.000 claims description 7
- 239000011777 magnesium Substances 0.000 claims description 7
- QVOIJBIQBYRBCF-UHFFFAOYSA-H yttrium(3+);tricarbonate Chemical compound [Y+3].[Y+3].[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O QVOIJBIQBYRBCF-UHFFFAOYSA-H 0.000 claims description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 6
- 239000004411 aluminium Substances 0.000 claims description 6
- 229910052744 lithium Inorganic materials 0.000 claims description 6
- 150000002739 metals Chemical class 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 4
- 229910021607 Silver chloride Inorganic materials 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 10
- 230000007797 corrosion Effects 0.000 abstract description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 15
- 238000003723 Smelting Methods 0.000 description 11
- 238000005457 optimization Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 229910000611 Zinc aluminium Inorganic materials 0.000 description 2
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 description 2
- 229910052787 antimony Inorganic materials 0.000 description 2
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009500 colour coating Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- KFZAUHNPPZCSCR-UHFFFAOYSA-N iron zinc Chemical compound [Fe].[Zn] KFZAUHNPPZCSCR-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052727 yttrium Inorganic materials 0.000 description 2
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
- C22C1/1047—Alloys containing non-metals starting from a melt by mixing and casting liquid metal matrix composites
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0068—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only nitrides
-
- 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
Abstract
The invention discloses a galvanized hot-dip galvanized alloy for narrow strip steel galvanizing and a preparation method thereof, and relates to the technical field of alloy material preparation. Adding zinc and magnesium alloy into a melting furnace, heating and melting, then adding lead and aluminum intermediate alloy, continuously stirring and melting, obtaining mixed metal liquid after complete mixing, then mixing the mixed metal liquid with silicon nitride, adding silicon, stirring and mixing, taking out furnace slag to obtain mixed metal liquid for pretreatment, and pouring and forming the mixed metal liquid for pretreatment to obtain the galvanized hot-dip zinc alloy for narrow-strip steel. The hot galvanizing alloy for the zinc plating of the narrow strip steel prepared by the invention has excellent corrosion resistance.
Description
Technical Field
The invention provides a galvanized hot-dip galvanized alloy for narrow-band steel and a preparation method thereof, and relates to the technical field of alloy material preparation.
Background
At present, the zinc alloy bath is adopted in the hot dip galvanizing industry at home and abroad, compared with pure galvanizing, the corrosion resistance, the surface quality, the coating bonding force and the like of a coating layer are greatly improved, the problems of poor melt fluidity, thicker coating layer and poor surface smoothness of the coating layer are solved to a certain extent by various zinc alloy baths used at present, but the zinc feeding amount is still higher, and the galvanizing cost is higher under the condition of greatly rising the zinc price in recent years.
The hot dip galvanizing of the narrow strip steel generally adopts a Q195 base plate for the hot dip galvanizing, the zinc bath used in the hot dip galvanizing is prepared by zinc alloy in a production field, and the preparation method of the current hot dip galvanizing zinc bath of the narrow strip steel generally comprises the following steps: the zinc bath is prepared by adopting a hot galvanizing alloy containing 0.2-0.4% of aluminum intermediate alloy and adding a zinc-aluminum intermediate alloy adjusting alloy, and part of users still adopt a mode of small zinc ingots and the zinc-aluminum intermediate alloy adjusting alloy to prepare the zinc bath. The on-site preparation method puts high demands on operators and requires certain galvanizing theoretical knowledge, the addition amount of various materials is accurately measured, the zinc bath components are detected, and the finally formed zinc bath components can be ensured to meet the use requirements.
Because the adopted galvanized substrate is poor in material, for example, Q195 belongs to high-carbon high-silicon steel, the melting speed of the galvanized substrate is higher than that of other steel in the galvanizing operation, and the steel is not suitable for hot dip galvanizing, but the market price of the steel is lower, so that the production cost can be effectively reduced, and the steel is widely adopted by narrow-band galvanizing users. The rolled Q195 steel has more residual oil stain and iron powder on the surface of the substrate, the galvanizing production process is not provided with the cleaning procedures of degreasing and derusting generally, and a large amount of residual iron powder enters a zinc bath, so that the iron content of the zinc bath is seriously over-standard, generally more than 0.06 percent. Because the content of the aluminum intermediate alloy of the existing zinc alloy is only 0.2-0.4%, the content is low, the zinc-iron compound in the zinc bath is not enough to be completely converted into the aluminum intermediate alloy-iron compound, so that the zinc-iron compound is prevented from being condensed into large particles and sinking to form bottom slag, the problems of 'slag adhering' on the plated plate surface, the galvanized slag rate being as high as about 30%, and the like still exist.
The existing hot galvanizing alloy for narrow bands contains metal elements such as antimony and the like which generate spangles, and the spangles are formed by crystallizing some elements in a zinc layer on the surface of a zinc coating after a steel coil is galvanized by a zinc tank and is cooled and solidified, namely the spangles are called as spangles. For example: when the content of antimony, tin, lead and other elements in the zinc bath reaches a certain proportion, spangles are formed on the surface of the zinc coating. Therefore, the existing zinc alloy cannot produce the non-zinc flower plate. The spangles formed on the surface of the galvanized sheet can only play an aesthetic role, but according to the current research on the corrosion resistance of the galvanized sheet, the corrosion resistance of the galvanized sheet is reduced to a certain extent compared with the corrosion resistance of the non-galvanized sheet. Meanwhile, because a large amount of galvanized plates need to be subjected to subsequent color coating treatment, the concave-convex surfaces formed by the spangles on the galvanized plates are not beneficial to subsequent color coating operation. Therefore, it is necessary to develop a hot dip galvanized alloy which can be used for producing high corrosion-resistant non-zinc flower plates.
Disclosure of Invention
The invention aims to provide a protein solid brewing particle and a preparation method thereof, which aim to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the galvanized hot-dip zinc alloy for the narrow strip steel is characterized by mainly comprising the following raw material components in parts by weight: 0.5-0.8 part of aluminum intermediate alloy, 0.003-0.05 part of lead, 0.03-0.05 part of silicon nitride, 0.03-0.05 part of magnesium alloy, 0.01-0.04 part of silicon and 98-99 parts of zinc.
Preferably, the zinc comprises zinc and other inevitable impurities.
As optimization, the hot galvanizing alloy for galvanizing the narrow strip steel mainly comprises the following raw material components in percentage by mass: 0.5 part of aluminum intermediate alloy, 0.4 part of lead, 0.03 part of silicon nitride, 0.05 part of magnesium alloy, 0.02 part of silicon and 98-99 parts of zinc.
Optimally, the preparation method of the aluminum intermediate alloy comprises the steps of mixing yttrium carbonate and the metallic aluminum intermediate alloy, adding cryolite, reacting at the constant temperature of 1000-1500 ℃ for 2-3 hours, and preparing the aluminum intermediate alloy.
As optimization, the preparation method of the galvanized hot-dip galvanized alloy for the narrow strip steel mainly comprises the following steps:
(1) adding zinc and magnesium alloy into a melting furnace, adding chloride, heating and melting, then adding lead and aluminum intermediate alloy, continuously stirring and melting, and removing furnace slag after completely mixing to obtain mixed metal liquid;
(2) and (2) mixing the mixed molten metal obtained in the step (1) with silicon nitride, adding silicon, stirring and mixing, taking out furnace slag to obtain mixed molten metal for pretreatment, and pouring and forming the mixed molten metal for pretreatment to obtain the galvanized hot-dip zinc alloy for narrow-strip steel.
Preferably, the heating and melting temperature in the step (1) is 550-800 ℃.
As optimization, the mass fractions of the metals in the magnesium alloy in the step (1) are as follows: 91% magnesium, 5% lithium, 3% aluminium master alloy and 1% lanthanum.
Preferably, the chloride in the step (1) is any one of ammonium chloride and silver chloride.
Compared with the prior art, the invention has the beneficial effects that:
the invention adds magnesium alloy, silicon, aluminum intermediate alloy and silicon nitride when preparing the hot galvanizing alloy of the narrow strip steel zinc plating.
Firstly, the added magnesium alloy has a lower melting point, can be melted first after being added into a melting furnace together with metal zinc, and can be uniformly mixed with other metal elements, so that the quality of the product is improved, and the magnesium alloy contains lanthanum element, so that the surface density of the zinc alloy after the product is used can be improved after the magnesium alloy is added into the product, and the corrosion resistance of the product is improved; secondly, silicon element and silicon nitride are added into the product, and the silicon element and the silicon nitride can play a role in lubrication after being added into the product, so that the quality of the product is improved, and secondly, the silicon nitride can be distributed on the surface of the product in the using process of the product, so that the corrosion resistance of the product is further improved; in addition, the aluminum intermediate alloy is added in the hot galvanizing alloy for preparing the narrow-band steel zinc plating, and the aluminum intermediate alloy contains yttrium element, so that zinc particles can be refined after the yttrium element is added into the product, the phenomenon of slag adhering during the use of the product is reduced, and the use effect of the product is improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be described below clearly and completely with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
To more clearly illustrate the method of the present invention, the following examples are given, and the method for testing each index of the galvanized hot-dip galvanized alloy for narrow strip steel manufactured in the following examples is as follows:
and (3) testing the corrosion resistance: the alloy obtained in each example was directly melted to form a zinc bath, and a narrow strip steel of Q195 was hot-dip galvanized to produce a zinc-free flower plate, which was immersed in a 10% sodium chloride solution by mass fraction, and the rust spot appearance time was measured.
Example 1
A galvanized hot-dip zinc alloy for narrow band steel mainly comprises the following components in parts by weight: 0.5 part of aluminum master alloy, 0.4 part of lead, 0.03 part of silicon nitride, 0.05 part of magnesium alloy, 0.02 part of silicon and 99 parts of zinc.
A preparation method of a galvanized hot-dip galvanized alloy for narrow strip steel mainly comprises the following steps:
(1) adding zinc and magnesium alloy into a smelting furnace, adding chloride, heating and melting, adding lead and aluminum intermediate alloy into the smelting furnace, continuously stirring and melting, and removing furnace slag after completely mixing to obtain mixed metal liquid;
(2) and (2) mixing the mixed molten metal obtained in the step (1) with silicon nitride, adding silicon, stirring and mixing, taking out furnace slag to obtain mixed molten metal for pretreatment, and pouring and forming the mixed molten metal for pretreatment to obtain the galvanized hot-dip zinc alloy for narrow-strip steel.
Preferably, the heating and melting temperature in the step (1) is 550-800 ℃.
As optimization, the mass fractions of the metals in the magnesium alloy in the step (1) are as follows: 91% magnesium, 5% lithium, 3% aluminium master alloy and 1% lanthanum.
Preferably, the chloride in the step (1) is ammonium chloride.
Optimally, the preparation method of the aluminum intermediate alloy in the step (1) comprises the steps of mixing aluminum and yttrium carbonate according to the mass ratio of 100:1, adding cryolite with the mass of 0.1-0.2 times that of the aluminum, reacting for 2 hours at the constant temperature of 1200 ℃, pouring and cooling to obtain the aluminum intermediate alloy.
Example 2
A galvanized hot-dip zinc alloy for narrow band steel mainly comprises the following components in parts by weight: 0.5 part of aluminum master alloy, 0.4 part of lead, 0.03 part of silicon nitride, 0.05 part of magnesium alloy and 99 parts of zinc.
A preparation method of a galvanized hot-dip galvanized alloy for narrow strip steel mainly comprises the following steps:
(1) adding zinc and magnesium alloy into a smelting furnace, adding chloride, heating and melting, adding lead and aluminum intermediate alloy into the smelting furnace, continuously stirring and melting, and removing furnace slag after completely mixing to obtain mixed metal liquid;
(2) and (2) mixing the mixed molten metal obtained in the step (1) with silicon nitride, stirring and mixing, fishing out furnace slag to obtain mixed molten metal for pretreatment, and pouring and forming the mixed molten metal for pretreatment to obtain the galvanized zinc alloy of the narrow strip steel.
Preferably, the heating and melting temperature in the step (1) is 550-800 ℃.
As optimization, the mass fractions of the metals in the magnesium alloy in the step (1) are as follows: 91% magnesium, 5% lithium, 3% aluminium master alloy and 1% lanthanum.
Preferably, the chloride in the step (1) is ammonium chloride.
Optimally, the preparation method of the aluminum intermediate alloy in the step (1) comprises the steps of mixing aluminum and yttrium carbonate according to the mass ratio of 100:1, adding cryolite with the mass of 0.1-0.2 times that of the aluminum, reacting for 2 hours at the constant temperature of 1200 ℃, pouring and cooling to obtain the aluminum intermediate alloy.
Example 3
A galvanized hot-dip zinc alloy for narrow band steel mainly comprises the following components in parts by weight: 0.5 part of aluminum master alloy, 0.4 part of lead, 0.03 part of silicon nitride, 0.05 part of magnesium, 0.02 part of silicon and 99 parts of zinc.
A preparation method of a galvanized hot-dip galvanized alloy for narrow strip steel mainly comprises the following steps:
(1) adding zinc into a smelting furnace, adding chloride into the smelting furnace, heating and melting, adding lead and aluminum intermediate alloy into the smelting furnace, continuously stirring and melting, and removing furnace slag after completely mixing to obtain mixed molten metal;
(2) and (2) mixing the mixed molten metal obtained in the step (1) with silicon nitride, adding silicon, stirring and mixing, taking out furnace slag to obtain mixed molten metal for pretreatment, and pouring and forming the mixed molten metal for pretreatment to obtain the galvanized hot-dip zinc alloy for narrow-strip steel.
Preferably, the heating and melting temperature in the step (1) is 550-800 ℃.
Preferably, the chloride in the step (1) is ammonium chloride.
Optimally, the preparation method of the aluminum intermediate alloy in the step (1) comprises the steps of mixing aluminum and yttrium carbonate according to the mass ratio of 100:1, adding cryolite with the mass of 0.1-0.2 times that of the aluminum, reacting for 2 hours at the constant temperature of 1200 ℃, pouring and cooling to obtain the aluminum intermediate alloy.
Example 4
A galvanized hot-dip zinc alloy for narrow band steel mainly comprises the following components in parts by weight: 0.5 part of aluminum master alloy, 0.4 part of lead, 0.05 part of magnesium alloy, 0.02 part of silicon and 99 parts of zinc.
A preparation method of a galvanized hot-dip galvanized alloy for narrow strip steel mainly comprises the following steps:
(1) adding zinc and magnesium alloy into a smelting furnace, adding chloride, heating and melting, adding lead and aluminum intermediate alloy into the smelting furnace, continuously stirring and melting, and removing furnace slag after completely mixing to obtain mixed metal liquid;
(2) and (2) mixing the mixed molten metal obtained in the step (1) with silicon, stirring and mixing, fishing out furnace slag to obtain mixed molten metal for pretreatment, and pouring and forming the mixed molten metal for pretreatment to obtain the galvanized zinc alloy of the narrow strip steel.
Preferably, the heating and melting temperature in the step (1) is 550-800 ℃.
As optimization, the mass fractions of the metals in the magnesium alloy in the step (1) are as follows: 91% magnesium, 5% lithium, 3% aluminium master alloy and 1% lanthanum.
Preferably, the chloride in the step (1) is ammonium chloride.
Optimally, the preparation method of the aluminum intermediate alloy in the step (1) comprises the steps of mixing aluminum and yttrium carbonate according to the mass ratio of 100:1, adding cryolite with the mass of 0.1-0.2 times that of the aluminum, reacting for 2 hours at the constant temperature of 1200 ℃, pouring and cooling to obtain the aluminum intermediate alloy.
Comparative example
A galvanized hot-dip zinc alloy for narrow band steel mainly comprises the following components in parts by weight: 0.5 part of aluminum master alloy, 0.4 part of lead, 0.05 part of silicon nitride, 0.03 part of magnesium alloy, 0.01 part of silicon and 99 parts of zinc.
A preparation method of a galvanized hot-dip galvanized alloy for narrow strip steel mainly comprises the following steps:
(1) adding zinc and magnesium alloy into a smelting furnace, adding chloride, heating and melting, adding lead and aluminum intermediate alloy into the smelting furnace, continuously stirring and melting, and removing furnace slag after completely mixing to obtain mixed metal liquid;
(2) and (2) mixing the mixed molten metal obtained in the step (1) with silicon nitride, adding silicon, stirring and mixing, taking out furnace slag to obtain mixed molten metal for pretreatment, and pouring and forming the mixed molten metal for pretreatment to obtain the galvanized hot-dip zinc alloy for narrow-strip steel.
Preferably, the heating and melting temperature in the step (1) is 550-800 ℃.
As optimization, the mass fractions of the metals in the magnesium alloy in the step (1) are as follows: 91% magnesium, 5% lithium, 3% aluminium master alloy and 1% lanthanum.
Preferably, the chloride in the step (1) is ammonium chloride.
Optimally, the preparation method of the aluminum intermediate alloy in the step (1) comprises the steps of mixing aluminum and yttrium carbonate according to the mass ratio of 100:1, adding cryolite with the mass of 0.1-0.2 times that of the aluminum, reacting for 2 hours at the constant temperature of 1200 ℃, pouring and cooling to obtain the aluminum intermediate alloy.
Examples of effects
The following table 1 shows the results of the performance analysis of the zinc-plated steel strip galvanized hot-dip galvanized alloy using examples 1 to 4 of the present invention and comparative examples.
TABLE 1
From the comparison of the experimental data of example 1 and the comparative example in table 1, it can be found that the addition of magnesium alloy, silicon and silicon nitride to the galvanized alloy for preparing the narrow-band steel can effectively improve the corrosion resistance of the product.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. The galvanized hot-dip zinc alloy for the narrow strip steel is characterized by mainly comprising the following raw material components in parts by weight: 0.5-0.8 part of aluminum intermediate alloy, 0.003-0.05 part of lead, 0.03-0.05 part of silicon nitride, 0.03-0.05 part of magnesium alloy, 0.01-0.04 part of silicon and 98-99 parts of zinc.
2. The galvanized zinc alloy for narrow strip steel according to claim 2, wherein the zinc includes zinc and inevitable other impurities.
3. The hot dip galvanizing alloy and the aluminum master alloy for the zinc plating of the narrow strip steel according to claim 3 are characterized in that the aluminum master alloy is prepared by mixing yttrium carbonate and the metal aluminum master alloy, adding cryolite, reacting for 2-3 hours at a constant temperature of 1000-1500 ℃ and then preparing the aluminum master alloy.
4. The galvanized alloy for galvanized narrow strip steel according to claim 3, characterized in that the galvanized alloy for galvanized narrow strip steel mainly comprises the following raw material components in percentage by mass: 0.5 part of aluminum intermediate alloy, 0.4 part of lead, 0.03 part of silicon nitride, 0.05 part of magnesium alloy, 0.02 part of silicon and 98-99 parts of zinc.
5. A preparation method of a galvanized hot-dip galvanized alloy for narrow strip steel is characterized by mainly comprising the following steps:
(1) adding zinc and magnesium alloy into a melting furnace, adding chloride, heating and melting, then adding lead and aluminum intermediate alloy, continuously stirring and melting, and removing furnace slag after completely mixing to obtain mixed metal liquid;
(2) and (2) mixing the mixed molten metal obtained in the step (1) with silicon nitride, adding silicon, stirring and mixing, taking out furnace slag to obtain mixed molten metal for pretreatment, and pouring and forming the mixed molten metal for pretreatment to obtain the galvanized hot-dip zinc alloy for narrow-strip steel.
6. The method for preparing the galvanized hot-dip galvanized alloy for narrow strip steel according to claim 5, wherein the heating melting temperature in the step (1) is 550-800 ℃.
7. The method for preparing the galvanized hot-dip galvanized alloy for narrow strip steel according to claim 5, wherein the mass fractions of the metals in the magnesium alloy in the step (1) are as follows: 91% magnesium, 5% lithium, 3% aluminium master alloy and 1% lanthanum.
8. The method for preparing galvanized alloy for narrow strip steel according to claim 5, characterized in that the chloride in step (1) is any one of ammonium chloride or silver chloride.
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| CN111705295A (en) * | 2020-08-10 | 2020-09-25 | 盐城科奥机械有限公司 | Zinc-magnesium-aluminum zincizing agent, anti-corrosion metal piece and zincizing method |
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| CN101092683A (en) * | 2007-07-23 | 2007-12-26 | 株洲冶炼集团股份有限公司 | Hot dip coating zinc alloy in use for zinc plating narrow steel strip, method, and ingot mold of zinc alloy |
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Application publication date: 20210413 |