CN110004390B - Zinc-aluminum-magnesium alloy coating and application thereof to steel wire rope for operation - Google Patents
Zinc-aluminum-magnesium alloy coating and application thereof to steel wire rope for operation Download PDFInfo
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- CN110004390B CN110004390B CN201910453062.0A CN201910453062A CN110004390B CN 110004390 B CN110004390 B CN 110004390B CN 201910453062 A CN201910453062 A CN 201910453062A CN 110004390 B CN110004390 B CN 110004390B
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- 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
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- 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
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- 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
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- 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
- C23C2/38—Wires; Tubes
Abstract
The invention relates to a zinc-aluminum-magnesium alloy coating and application thereof to a steel wire rope for operation, wherein the zinc-aluminum-magnesium alloy coating comprises the following components in percentage by mass: 10-18% of Al, 3-6% of Mg, 0.1-1.0% of Nb, 0.05-0.3% of Ti, 0.01-0.1% of V and the balance of zinc. According to the invention, the zinc-aluminum-magnesium alloy coating suitable for the steel wire rope for operation is obtained by controlling the components and the content of the alloy, the obtained coating has excellent mechanical property and corrosion resistance, is in accordance with the requirements of the steel wire rope for operation, improves the application safety coefficient of the steel wire rope, prolongs the service life, can meet more severe working conditions, greatly fills the market blank of the steel wire rope with high strength and high corrosion resistance, and has good economic benefit and application prospect.
Description
Technical Field
The invention relates to the fields of alloy, hot dip coating and steel wire ropes, in particular to a zinc-aluminum-magnesium alloy coating and application thereof to a steel wire rope for operation.
Background
The steel wire rope is a spiral steel wire bundle formed by twisting steel wires with mechanical property and geometric dimension meeting requirements together according to a certain rule, and consists of the steel wires, a rope core and lubricating grease. The steel wire rope is a spiral rope which is formed by twisting a plurality of layers of steel wires into strands, and then twisting a certain number of strands by taking a rope core as a center. In a material handling machine for lifting, pulling, tensioning and carrying. The steel wire rope has high strength, light dead weight, stable work, difficult sudden whole breakage and reliable work.
The steel wire rope for operation has the characteristic of being thin, so that the steel wire rope is widely applied to the fields of automobiles, motorcycles, bicycles, electric vehicles, spacecrafts and the like. In the prior art, the performance of the steel wire rope is generally improved by adding a coating outside the steel wire rope, but the traditional zinc or zinc-aluminum alloy coating focuses more on improving the corrosion resistance of the steel wire rope, and does not contribute much to the mechanical performance. Since the steel cord for steering is thin, it is required to have not only good corrosion resistance but also excellent mechanical properties. The common zinc-containing coating commonly used in the current market is difficult to meet the requirements of the steel wire rope for operation. In contrast, the zinc-aluminum-magnesium coating can provide certain mechanical property contribution while providing corrosion resistance, and meets the requirements of the steel wire rope for operation.
The prior zinc-aluminum-magnesium coating has a plurality of formulas, but the emphasis points are different. For example, CN105039903A discloses a process for preparing a zinc-aluminum-magnesium alloy co-infiltration layer based on a single plating method, wherein the plating layer comprises the following components: 45-50% of Al, 6-12% of Mg and 34-58% of Zn, and the zinc-aluminum-magnesium co-infiltration layer has the characteristics of high thickness, excellent appearance of the infiltration layer, high bonding strength and the like.
CN105500822A discloses a zinc-aluminum-magnesium wire-drawing coating steel plate, the composition of the zinc-aluminum-magnesium coating is: 6.1 to 13.8 percent of All, 1.5 to 6.7 percent of Mg, 1.5 to 4.2 percent of Si, 0.1 to 0.5 percent of Fe, less than or equal to 0.15 percent of mixed rare earth and the balance of Zn; the coating has good hardness and corrosion resistance.
CN108977695A discloses a titanium and antimony-containing hot-dip galvanized aluminum-magnesium alloy and a preparation method thereof, wherein the alloy comprises the following components in percentage by mass: al: 10.0-12.0 wt.%, Mg: 2.5-3.5 wt.%, Ti: 0.1-0.2 wt.%, Sb: 0.1-0.2 wt.%, the balance being Zn. By adding titanium element and antimony element into the zinc-aluminum-magnesium alloy, the scratch resistance and corrosion resistance of the hot dip galvanized aluminum-magnesium alloy and the appearance decoration of a coating are improved.
CN104711502A discloses a corrosion-resistant zinc-aluminum-magnesium rare earth alloy plating layer and a preparation method and a hot dipping method thereof, wherein the plating layer comprises the following raw materials in percentage by weight: 3 to 9 weight percent of Al, 0.03 to 0.09 weight percent of Mg, 0.01 to 0.15 weight percent of rare earth and the balance of zinc. The surface of the plating layer is flat and smooth, and the plating layer has excellent corrosion resistance.
CN106702213A discloses a zinc-aluminum-magnesium alloy wire containing rare earth, a preparation method and application thereof, the zinc-aluminum-magnesium alloy wire contains 15-40% of aluminum, 0.2-4.0% of magnesium, 0.02-0.2% of rare earth elements of cerium and erbium, impurities not more than 0.025%, and the balance of zinc; the mass ratio of the two rare earth elements is 3:7 or 7: 3. The rare earth zinc-aluminum-magnesium alloy hot coating has excellent adhesive force, good physical and mechanical properties and corrosion resistance.
CN109402450A discloses a zinc-aluminum-magnesium alloy containing zirconium for hot dipping and a preparation method thereof. The zinc-aluminum-magnesium alloy containing the zirconium element for hot plating consists of Zn, Al, Mg and Zr elements, and the alloy comprises the following components in percentage by mass: al: 4.0-5.0 wt.%, Mg: 0.05-0.15 wt.%, Zr: 0.05-0.5 wt.%, the balance being Zn. The method improves the corrosion resistance and the scratch resistance of the hot-dip galvanized aluminum-magnesium alloy.
Different zinc-aluminum-magnesium coatings have different element compositions and contents, which bring larger performance difference. For the steel wire rope for operation, good mechanical property and corrosion resistance need to be simultaneously satisfied. However, the conventional zinc-aluminum-magnesium coating formula is difficult to meet the requirements, so that a new zinc-aluminum-magnesium alloy coating suitable for a steel wire rope for operation needs to be developed.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a zinc-aluminum-magnesium alloy coating and an application thereof on a steel wire rope for operation.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a zinc-aluminum-magnesium alloy coating, which comprises the following components in percentage by mass: 10-18% of Al, 3-6% of Mg, 0.1-1.0% of Nb, 0.05-0.3% of Ti, 0.01-0.1% of V and the balance of zinc.
The invention adds Nb, Ti and V with specific content into the zinc-aluminum-magnesium alloy to improve the performance of the alloy. Wherein, after the alloy forms a solid solution, trace Nb element can cause lattice distortion and is dissolved in solute atoms to play a role in solid solution strengtheningThe application is as follows. The addition of Ti and V can provide nucleation points and increase the nucleation rate, thereby refining the crystalline structure, producing the effect of fine grain strengthening and improving the strength of the alloy. Further, Nb may be formed among Nb, V and Al3-nVnThe Al (n is more than 0.0.1 and less than 0.05) compound has fine crystal grains, and can form a second phase which is uniformly distributed in the matrix metal in the solidification process, thereby generating the dispersion strengthening effect and further improving the strength of the alloy.
The invention controls the Al content in the zinc-aluminum-magnesium alloy to be 10-18% and the Mg content to be 3-6%, and the zinc-aluminum-magnesium alloy has excellent strength and corrosion resistance under the proportion, thereby meeting the requirements of the steel wire rope for operation.
According to the invention, the Al content in the zinc-aluminum-magnesium alloy coating is 10-18% by mass, and may be, for example, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17% or 18%, and the specific values between the above values are not exhaustive for reasons of space and simplicity.
According to the invention, the Mg content of the zinc-aluminum-magnesium alloy coating is 3-6% by mass, for example, 3%, 4%, 5% or 6%, and the specific values between the above values are not exhaustive for reasons of space and simplicity.
According to the invention, the content of Nb in the zinc-aluminum-magnesium alloy coating is 0.1-1.0% by mass, and may be, for example, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9% or 1.0%, and the specific values between the above values are not exhaustive for reasons of brevity and simplicity.
For the present invention, the Nb content in the coating is of great importance, and when the Nb content is too high (> 1.0%), a large amount of second phases are formed in the coating, reducing the toughness of the coating. When the content of Nb is too low (< 1.0%), trace Nb atoms are almost dissolved in solute atoms in a solid state, so that dispersion strengthening cannot be generated, and the mechanical property of the plating layer is further influenced.
According to the invention, the content of Ti in the zinc-aluminum-magnesium alloy coating is 0.05-0.3% by mass, for example 0.05%, 0.1%, 0.15%, 0.2%, 0.25% or 0.3%, and the specific values between the above values, which are not exhaustive for reasons of brevity and simplicity. Zr0.01-0.1%.
According to the invention, the content of V in the zinc-aluminum-magnesium alloy coating is 0.01-0.1% by mass, and may be, for example, 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, or 0.1%, and the specific values between the above values are not exhaustive for reasons of space and simplicity.
According to the invention, the zinc-aluminum-magnesium alloy coating also contains 0.1-0.5% of rare earth elements by mass percentage, for example 0.1%, 0.2%, 0.3%, 0.4% or 0.5%, and the specific values between the above values are limited by space and for the sake of brevity and are not exhaustive in this application.
According to the invention, the rare earth element is at least one of lanthanum, cerium or neodymium.
In order to further improve the corrosion resistance of the plating layer, the invention adds a part of rare earth elements into the alloy, and the rare earth elements with the components and the content can effectively improve the corrosion resistance of the alloy plating layer.
In a second aspect, the present invention provides the use of the zinc-aluminum-magnesium alloy coating according to the first aspect, wherein the zinc-aluminum-magnesium alloy coating is applied to a steel wire rope for operation, and the specific operation comprises the following steps:
(1) preparing a zinc-aluminum-magnesium alloy melt according to the formula amount;
(2) selecting high-carbon steel for wire coiling, and drawing the wire rod for one time;
(3) annealing the steel wire subjected to the primary drawing in the step (2), and then performing secondary drawing;
(4) annealing the steel wire subjected to the secondary drawing in the step (3), and performing hot-dipping in the melt obtained in the step (1) after the annealing is finished to obtain a zinc-aluminum-magnesium coating on the surface of the steel wire;
(5) and (5) drawing the steel wire subjected to hot dipping in the step (4) for three times, and stranding and rope combining according to requirements after drawing is finished to obtain the finished steel wire rope for operation.
According to the invention, the specific operation of step (1) is:
(a) preparing Al-Nb, Al-V and Al-Ti intermediate alloys;
(b) according to the formula, zinc ingot, aluminum ingot, Al-Nb, Al-V and Al-Ti intermediate alloy are mixed and heated to melt, then Al-Mg alloy and rare earth are added, and alloy melt is obtained after melting.
In the process of preparing the alloy melt, Nb, V and Ti are preferentially prepared into intermediate alloys with Al respectively, wherein the content of Nb in the Al-Nb intermediate alloy is 3-10%, the content of Ti in the Al-Ti intermediate alloy is 5-8%, and the content of V in the Al-V intermediate alloy is 5-8%, and the intermediate alloys are prepared by adopting a method well known by a person skilled in the art, and the method is not specially limited.
When the rare earth element is added in the step (b), pressing the rare earth into the bottom of the melt; it is also possible to prepare an intermediate alloy of aluminum and the corresponding rare earth in advance and add it as needed.
According to the present invention, the diameter of the steel wire after the one-time drawing in the step (2) is 3.0-5.5mm, for example, 3.0mm, 3.5mm, 4mm, 4.5mm, 5mm or 5.5mm, and the specific values between the above values are limited by space and for the sake of brevity, and the present application is not exhaustive.
According to the present invention, the temperature of the annealing treatment in step (3) is 850-.
According to the present invention, the annealing time in step (3) is 5-90min, such as 5min, 10min, 20min, 30min, 40min, 50min, 60min, 70min, 80min or 90min, and the specific values between the above values are limited by space and for brevity, and the application is not exhaustive.
According to the present invention, the diameter of the steel wire after the secondary drawing in the step (3) is 1.0-2.2mm, for example, 1.0mm, 1.3mm, 1.5mm, 1.8mm, 2mm or 2.2mm, and the specific values therebetween are not exhaustive for reasons of brevity and simplicity.
According to the present invention, the annealing temperature in the step (4) is 800-.
According to the present invention, the annealing time in step (4) is 5-90min, such as 5min, 10min, 20min, 30min, 40min, 50min, 60min, 70min, 80min or 90min, and the specific values between the above values are limited by space and for brevity, and the application is not exhaustive.
According to the invention, the hot dipping operation in the step (4) is as follows: and cleaning and plating assisting are carried out on the steel wire subjected to annealing treatment after secondary drawing in sequence, and then the steel wire continuously passes through a plating bath containing alloy melt to obtain the steel wire with a zinc-aluminum-magnesium coating.
According to the present invention, the monofilament diameter obtained after the three drawing steps in step (5) is 0.10-0.80mm, such as 0.10mm, 0.20mm, 0.30mm, 0.40mm, 0.50mm, 0.60mm, 0.70mm or 0.80mm, and the specific values therebetween are not exhaustive for reasons of space and simplicity.
According to the invention, the content of the coating on the monofilament obtained after the drawing for three times in the step (5) is 15-65g/m2For example, it may be 15g/m2、20g/m2、30g/m2、40g/m2、50g/m2、60g/m2Or 65g/m2And the specific values therebetween, are not exhaustive for the purpose of brevity and clarity.
According to the invention, the diameter of the finished handling steel cord obtained in step (5) is 1.0-7.0mm, and may be, for example, 1.0mm, 2.0mm, 3.0mm, 4.0mm, 5.0mm, 6.0mm or 7.0mm, and the specific values therebetween are not exhaustive for reasons of space and simplicity.
Compared with the prior art, the invention has at least the following beneficial effects:
(1) the invention obtains the zinc-aluminum-magnesium alloy coating suitable for the steel wire rope for operation by controlling the components and the content of the alloy, the obtained formula also comprises a certain amount of Nb, Ti and V besides zinc-aluminum-magnesium with a specific proportion, the elements generate the cooperation effect, and simultaneously the solid solution strengthening, the fine grain strengthening and the dispersion strengthening effects are formed, the mechanical property of the coating is greatly improved, and the coating is matched with the requirement of the steel wire rope for operation.
(2) The invention adjusts the proportion of zinc, aluminum and magnesium to obtain good resistance performance, and adds a certain amount of rare earth elements on the basis, thereby further improving the corrosion resistance of the plating layer.
(3) The zinc-aluminum-magnesium coating provided by the invention has excellent mechanical property and corrosion resistance, and the corrosion resistance and the mechanical property are greatly improved compared with the traditional pure zinc coating, zinc-aluminum alloy coating and common zinc-aluminum-magnesium coating. When the steel wire rope is applied to the steel wire rope for operation, the application safety coefficient of the steel wire rope is improved, the service life is prolonged, more harsh working conditions can be met, the market blank of the steel wire rope with high strength and high corrosion resistance is greatly filled, and the steel wire rope has good economic benefit and application prospect.
Detailed Description
For the purpose of facilitating an understanding of the present invention, the present invention will now be described by way of examples. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
The carbon steel with the carbon content of 0.85 percent is selected as the raw material in the embodiment of the invention.
The Al-Nb intermediate alloy partially prepared by the embodiment of the invention contains 5% of Nb, 5% of Ti and 5% of V.
The plating assistant agent selected in the plating assistant process is not specially limited, and all the common hot dip plating assistant agent formulas in the field are suitable for the invention. For example, the plating assistant agent selected in the embodiments of the present invention has the following formula: 100g/L of zinc chloride, 120g/L of ammonium chloride, 10g/L of potassium fluoride, 2g/L of sodium borohydride and the balance of water.
The stranding machine and the rope combining machine adopt 150B type, 200B type or 300B type stranding machines and the like.
Typical but non-limiting embodiments of the invention are as follows:
example 1
The embodiment provides a zinc-aluminum-magnesium alloy coating, which comprises the following components in percentage by mass: 15% of Al, 5% of Mg, 0.8% of Nb, 0.1% of Ti, 0.06% of V, 0.2% of Ce and the balance of zinc.
The alloy coating is applied to a steel wire rope for operation, and is prepared according to the following method:
(1) mixing zinc ingots, aluminum ingots, Al-Nb, Al-V and Al-Ti intermediate alloys according to the formula amount, heating and melting, then adding Al-Mg alloy, pressing rare earth into the bottom of the melt, and melting to obtain an alloy melt;
(2) coiling high-carbon steel, adding hydrochloric acid to clean the surface of the coiled steel and then drying the coiled steel, and then drawing the coiled steel for one time by using a wire drawing machine to obtain a steel wire with the diameter of 3.5 mm;
(3) placing the steel wire subjected to primary drawing in the step (2) in an annealing furnace, annealing at 1100 ℃ for 50min, slowly cooling along with the furnace, and then performing secondary drawing to obtain a steel wire with the diameter of 1.2 mm;
(4) annealing the steel wire subjected to the secondary drawing in the step (3) again at the temperature of 1000 ℃ for 30min, sequentially performing alkali washing, water washing, acid washing and water washing on the steel wire after the heat treatment is finished, then placing the steel wire in a plating assistant solution prepared in advance for plating assistant, and drying the steel wire after the plating assistant is finished; controlling the wiring speed to continuously pass through a plating bath containing the melt obtained in the step (1) to obtain a steel wire with a zinc-aluminum-magnesium coating;
(5) drawing the steel wire hot-dipped in the step (4) for three times to obtain a monofilament with the diameter of 0.30mm, and coating the monofilamentThe gram weight is 19-25g/m2Then, stranding was carried out by a stranding machine in a form of 1 × 19 with right alternate twisting in the direction of twist to obtain a finished wire rope for steering having a diameter of 1.5 mm.
Example 2
The embodiment provides a zinc-aluminum-magnesium alloy coating, which comprises the following components in percentage by mass: 12% of Al, 4.5% of Mg, 0.5% of Nb, 0.15% of Ti, 0.08% of V, 0.1% of Ce0.1%, 0.1% of Nd and the balance of zinc.
The alloy coating is applied to a steel wire rope for operation, and is prepared according to the following method:
(1) mixing zinc ingots, aluminum ingots, Al-Nb, Al-V and Al-Ti intermediate alloys according to the formula amount, heating and melting, then adding Al-Mg alloy, pressing rare earth into the bottom of the melt, and melting to obtain an alloy melt;
(2) coiling high-carbon steel, adding hydrochloric acid to clean the surface of the coiled steel and then drying the coiled steel, and then drawing the coiled steel for one time by using a wire drawing machine to obtain a steel wire with the diameter of 3.0 mm;
(3) placing the steel wire subjected to primary drawing in the step (2) in an annealing furnace, annealing at 1200 ℃ for 45min, slowly cooling along with the furnace, and then performing secondary drawing to obtain a steel wire with the diameter of 1.2 mm;
(4) annealing the steel wire subjected to secondary drawing in the step (3) again at 900 ℃ for 30min, sequentially performing alkali washing, water washing, acid washing and water washing on the steel wire after the heat treatment is finished, then placing the steel wire in a plating assistant solution prepared in advance for plating assistant, and drying the steel wire after the plating assistant is finished; controlling the wiring speed to continuously pass through a plating bath containing the melt obtained in the step (1) to obtain a steel wire with a zinc-aluminum-magnesium coating;
(5) drawing the steel wire subjected to hot dipping in the step (4) for three times to obtain a monofilament with the diameter of 0.28mm, wherein the gram weight of a coating on the monofilament is 16-22g/m2Then, stranding is carried out by a stranding machine in a stranding form of 1 × 7 in a left twisting direction, and then stranding is carried out by a rope stranding machine in a stranding form of 7 × 7 in a right twisting direction to obtain a finished steel wire rope for handling with a diameter of 2.5 mm.
Example 3
The embodiment provides a zinc-aluminum-magnesium alloy coating, which comprises the following components in percentage by mass: 18% of Al, 3% of Mg, 0.3% of Nb, 0.2% of Ti, 0.03% of V, 0.2% of La and the balance of zinc.
The alloy coating is applied to a steel wire rope for operation, and is prepared according to the following method:
(1) mixing zinc ingots, aluminum ingots, Al-Nb, Al-V and Al-Ti intermediate alloys according to the formula amount, heating and melting, then adding Al-Mg alloy, pressing rare earth into the bottom of the melt, and melting to obtain an alloy melt;
(2) coiling high-carbon steel, adding hydrochloric acid to clean the surface of the coiled steel and then drying the coiled steel, and then drawing the coiled steel for one time by using a wire drawing machine to obtain a steel wire with the diameter of 4.8 mm;
(3) placing the steel wire subjected to primary drawing in the step (2) in an annealing furnace, annealing at 1050 ℃ for 80min, slowly cooling along with the furnace, and then performing secondary drawing to obtain a steel wire with the diameter of 1.6 mm;
(4) annealing the steel wire subjected to secondary drawing in the step (3) again at 850 ℃ for 40min, sequentially performing alkali washing, water washing, acid washing and water washing on the steel wire after the heat treatment is finished, then placing the steel wire in a plating assistant solution prepared in advance for plating assistant, and drying the steel wire after the plating assistant is finished; controlling the wiring speed to continuously pass through a plating bath containing the melt obtained in the step (1) to obtain a steel wire with a zinc-aluminum-magnesium coating;
(5) drawing the steel wire subjected to hot dipping in the step (4) for three times to obtain a monofilament with the diameter of 0.42mm, wherein the gram weight of a coating on the monofilament is 25-36g/m2Then, the strand was twisted by a stranding machine in a form of 1 × 19 with the left twist direction, and the strand was stranded by a stranding machine in a form of 7 × 19 with the right twist direction to obtain a finished wire rope for steering having a diameter of 6.35 mm.
Comparative example 1
The comparative example provides a zinc-aluminum-magnesium alloy coating, which comprises the following components in percentage by mass: 9.5 percent of aluminum, 4 percent of magnesium and the balance of zinc.
The procedure and conditions for preparing a steel wire rope for steering of this comparative example were exactly the same as in example 1 except for the coating formulation.
Comparative example 2
The comparative example provides a zinc-aluminum-magnesium alloy coating (CN108977695A), which comprises the following components in percentage by mass: 12% of Al, 3% of Mg, 0.15% of Ti, 0.1% of Sb and the balance of Zn.
The procedure and conditions for preparing a steel wire rope for steering of this comparative example were exactly the same as in example 1 except for the coating formulation.
Comparative example 3
The comparative example provides a zinc-aluminum-magnesium alloy coating (CN106702213A), which comprises the following components in percentage by mass: 20% of Al, 2% of Mg, 0.03% of Er, 0.07% of Ce and the balance of Zn.
The procedure and conditions for preparing a steel wire rope for steering of this comparative example were exactly the same as in example 1 except for the coating formulation.
Comparative example 4
The comparative example provides a zinc-aluminum-magnesium alloy coating, which comprises the following components in percentage by mass: 15% of Al, 5% of Mg, 0.1% of Ti, 0.06% of V, 0.2% of Ce and the balance of zinc. That is, the alloy plating layer contained no Nb as compared with example 1.
The procedure and conditions for preparing a steel wire rope for steering of this comparative example were exactly the same as in example 1 except for the coating formulation.
Comparative example 5
The comparative example provides a zinc-aluminum-magnesium alloy coating, which comprises the following components in percentage by mass: 15% of Al, 5% of Mg, 0.8% of Nb, 0.06% of V, 0.2% of Ce and the balance of zinc. That is, the alloy plating layer contained no Ti as compared with example 1.
The procedure and conditions for preparing a steel wire rope for steering of this comparative example were exactly the same as in example 1 except for the coating formulation.
Comparative example 6
The comparative example provides a zinc-aluminum-magnesium alloy coating, which comprises the following components in percentage by mass: 15% of Al, 5% of Mg, 0.8% of Nb, 0.1% of Ti, 0.2% of Ce and the balance of zinc. That is, V was not contained in the alloy plating layer as compared with example 1.
The procedure and conditions for preparing a steel wire rope for steering of this comparative example were exactly the same as in example 1 except for the coating formulation.
Comparative example 7
The comparative example provides a zinc-aluminum-magnesium alloy coating, which comprises the following components in percentage by mass: 15% of Al, 5% of Mg, 2% of Nb, 0.1% of Ti, 0.06% of V, 0.2% of Ce and the balance of zinc. That is, the Nd content in the alloy plating layer was too large compared to example 1.
The procedure and conditions for preparing a steel wire rope for steering of this comparative example were exactly the same as in example 1 except for the coating formulation.
Comparative example 8
The comparative example provides a zinc-aluminum-magnesium alloy coating, which comprises the following components in percentage by mass: 15% of Al, 5% of Mg, 0.05% of Nb, 0.1% of Ti, 0.06% of V, 0.2% of Ce and the balance of zinc. That is, the Nd content in the alloy plating layer was insufficient compared to example 1.
The procedure and conditions for preparing a steel wire rope for steering of this comparative example were exactly the same as in example 1 except for the coating formulation.
Performance detection
The monofilaments obtained in each example and comparative examples 1-3 were subjected to a neutral salt spray test using the equipment and method provided in GB/T1445-. The results obtained are shown in table 1:
TABLE 1
The mechanical properties of the samples obtained in each example and comparative example are tested by adopting the experimental method provided in GB/T1445-2008; the test object of the tensile strength is a monofilament, and the test object of the fatigue times is a finished steel wire rope. The results obtained are shown in table 2:
TABLE 2
As can be seen from the data in Table 1, the corrosion resistance time of the monofilaments obtained in the examples of the present invention is 700h or more, and the monofilaments have excellent corrosion resistance.
As is clear from the data in Table 2, the tensile strength of the monofilaments obtained in the examples of the present invention was 2500MPa or more. On the premise that the diameter of the monofilament and the quality of the coating are almost the same, the tensile strength of the monofilament obtained in the embodiment 1 is at least 300MPa higher than that of the monofilament obtained in the comparison ratio of 1-3, which shows that when the alloy coating provided by the invention is applied to a steel wire rope for operation, the alloy coating can provide larger mechanical property contribution compared with zinc-aluminum-magnesium coatings of other formulas.
In addition, as can be seen from the comparison of the data in example 1 and comparative examples 4 to 8 in table 2, when any one of Nb, Ti and V is not added, or the addition amount of Nb is too high or too low, the tensile strength is remarkably reduced, which indicates that the components and the content in the alloy coating provided by the present invention are indispensable conditions for obtaining excellent mechanical properties.
In addition, the fatigue life of the finished steel wire rope obtained in the embodiment 1 of the invention is far superior to that of each proportion, which shows that after the surface is coated with the zinc-aluminum-magnesium alloy coating provided by the invention, the steel wire rope for operation obtains excellent mechanical property, the service life is prolonged, and the application prospect is good.
The applicant states that the present invention is illustrated by the above examples to show the detailed process equipment and process flow of the present invention, but the present invention is not limited to the above detailed process equipment and process flow, i.e. it does not mean that the present invention must rely on the above detailed process equipment and process flow to be implemented. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (14)
1. The application of the zinc-aluminum-magnesium alloy coating is characterized in that the zinc-aluminum-magnesium alloy coating comprises the following components in percentage by mass: 10-18% of Al, 3-6% of Mg, 0.3-1.0% of Nb, 0.05-0.3% of Ti, 0.02-0.1% of V, 0.1-0.5% of rare earth elements and the balance of zinc; nb is formed among Nb, V and Al3-nVnAn Al compound, wherein n is more than 0.01 and less than 0.05;
the zinc-aluminum-magnesium alloy coating is applied to a steel wire rope for operation.
2. The use of claim 1, wherein the rare earth element is at least one of lanthanum, cerium or neodymium.
3. The application of claim 1 or 2, wherein the specific operation of the application comprises the steps of:
(1) preparing a zinc-aluminum-magnesium alloy melt according to the formula amount;
(2) selecting high-carbon steel for wire coiling, and drawing the wire rod for one time;
(3) annealing the steel wire subjected to the primary drawing in the step (2), and then performing secondary drawing;
(4) annealing the steel wire subjected to the secondary drawing in the step (3), and performing hot-dipping in the melt obtained in the step (1) after the annealing is finished to obtain a zinc-aluminum-magnesium coating on the surface of the steel wire;
(5) and (5) drawing the steel wire subjected to hot dipping in the step (4) for three times, and stranding and rope combining according to requirements after drawing is finished to obtain the finished steel wire rope for operation.
4. The use according to claim 3, wherein the specific operations of step (1) are:
(a) preparing Al-Nb, Al-V and Al-Ti intermediate alloys;
(b) according to the formula, zinc ingot, aluminum ingot, Al-Nb, Al-V and Al-Ti intermediate alloy are mixed and heated to melt, then Al-Mg alloy and rare earth are added, and alloy melt is obtained after melting.
5. The use according to claim 3, wherein the steel wire after said one drawing in step (2) has a diameter of 3.0-5.5 mm.
6. The use according to claim 3, wherein the temperature of the annealing treatment in step (3) is 850-1400 ℃.
7. The use of claim 3, wherein the annealing in step (3) is carried out for a period of 5-90 min.
8. The use according to claim 3, wherein the diameter of the steel wire after said secondary drawing in step (3) is 1.0-2.2 mm.
9. The use according to claim 3, wherein the annealing treatment in step (4) is carried out at a temperature of 800-.
10. The use of claim 3, wherein the annealing treatment of step (4) is carried out for a period of 5-90 min.
11. The application as claimed in claim 3, wherein the hot dipping in the step (4) is carried out by the following specific operations: and cleaning and plating assisting are carried out on the steel wire subjected to annealing treatment after secondary drawing in sequence, and then the steel wire continuously passes through a plating bath containing alloy melt to obtain the steel wire with a zinc-aluminum-magnesium coating.
12. The use of claim 3, wherein said triple drawing of step (5) results in a monofilament having a diameter of 0.10mm to 0.80 mm.
13. The use of claim 3, wherein said three of step (5)The content of the coating on the monofilament obtained after secondary drawing is 15-65g/m2。
14. Use according to claim 3, wherein the finished steering cord obtained in step (5) has a diameter of 1.0-7.0 mm.
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| CN111733618A (en) * | 2020-06-15 | 2020-10-02 | 无锡市坤通钢丝绳有限公司 | Steel wire rope for high-altitude operation hanging basket |
| CN112575276A (en) * | 2020-12-03 | 2021-03-30 | 攀钢集团研究院有限公司 | Hot-dip zinc-aluminum-magnesium alloy coated steel plate for ultra-deep drawing and preparation method thereof |
| CN113388796B (en) * | 2021-08-16 | 2021-11-02 | 天津市新宇彩板有限公司 | Hot-dip zinc-aluminum-magnesium plating solution for steel surface and plating method using same |
| CN114086096A (en) * | 2021-11-30 | 2022-02-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Zinc-aluminum-magnesium alloy coated steel containing V, Ti and Nb and preparation method thereof |
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