CN113528958A - Hot-rolled wire rod for high-strength wear-resistant steel welding wire and production method thereof - Google Patents
Hot-rolled wire rod for high-strength wear-resistant steel welding wire and production method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
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- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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Abstract
The invention relates to the technical field of metallurgy, in particular to a hot-rolled wire rod for a high-strength wear-resistant steel welding wire and a production method thereof, which realize the cooperative complementation among the functions of various elements by adding Zr, V and Ti with specific contents into the hot-rolled wire rod, designing the contents of various components in the hot-rolled wire rod and combining with an optimal preparation process method, improve the rigidity, the strength and the wear resistance of the hot-rolled wire rod steel for the welding wire while reducing the influence of inevitable welding harm elements in steel on the welding performance and the crack sensitivity, and meet the requirements of 1000Mpa grade high-strength wear-resistant steel on the rigidity, the strength and the wear resistance of a special welding wire.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a hot-rolled wire rod for a high-strength wear-resistant steel welding wire and a production method thereof.
Background
With the rapid development of the mechanical manufacturing industry, increasing the strength of metal materials to reduce the weight of components is becoming the development direction of structural steel. In particular, in recent years, in the fields of engineering machinery, automobile vehicles, coal, mine machinery and the like, the strength grade of the used metal material is higher and higher, and more traditional strength steels are replaced by high-strength high-wear-resistant steels. For example, ultra-high strength steel is used for manufacturing structural members of construction machines, booms of cranes, beam structures of automobiles, and members of mobile equipment such as car bodies. The traditional strength steel is replaced by the ultrahigh strength steel, so that the dead weight of equipment can be obviously reduced, the fuel consumption is reduced, the bearing capacity is improved, the working efficiency is improved, and the economic benefit brought by the method is extremely considerable.
With the high-strength wear-resistant steel with high strength and good wear resistance, the welding wire used for welding the steel is more and more widely applied, but the welding wire which can meet the welding requirement of the high-strength wear-resistant steel in the market is few, the welding wire with lower grade is mostly adopted in practical production for welding, the steel structure performance after cladding of the welding wires can not be matched with the high-strength wear-resistant steel in hardness, strength and wear resistance, the welding requirement of the high-strength wear-resistant steel can not be met, and therefore the welding wire material for welding the high-strength wear-resistant steel needs to be developed urgently, and the application and popularization of the high-strength wear-resistant steel are further promoted.
Disclosure of Invention
Aiming at the technical problem that the hardness, strength and wear resistance of a welding wire after cladding cannot meet the welding requirement of high-strength wear-resistant steel in the prior art, the invention provides the hot-rolled wire rod for the welding wire of the high-strength wear-resistant steel and the production method thereof, and the metal obtained after cladding has excellent tensile property, yield property, elongation after fracture and impact resistance, and can meet the requirement of the welding wire for welding the 1000Mpa grade high-strength wear-resistant steel.
In order to achieve the purpose of the invention, the embodiment of the invention adopts the following technical scheme:
the embodiment of the invention provides a hot-rolled wire rod for a high-strength wear-resistant steel welding wire, which comprises the following elements in percentage by mass: 0.18% -0.25%, Si: 1.10% -1.50%, Mn: 1.70% -2.00%, Ni: 1.50% -2.10%, Mo: 0.30-0.50%, Cr: 0.05% -0.15%, V: 0.02% -0.04%, N: 0.06% -0.09%, Ti: 0.05-0.08%, Zr: 0.03 to 0.07 percent, P: less than or equal to 0.01 percent, S: less than or equal to 0.008 percent, As: less than or equal to 0.01 percent, Sb: less than or equal to 0.01 percent, O: less than or equal to 0.005 percent, H: less than or equal to 0.0001 percent, and the balance being Fe.
Compared with the prior art, the Zr element, the V element and the Ti element with specific contents are added into the hot-rolled wire rod for the high-strength wear-resistant steel welding wire, so that the functional complementation of the three elements is realized, the effects of refining the grain structure of a welding seam and improving the mechanical property of a welding joint are achieved, insoluble oxides cannot be generated, the gas welding difficulty is increased, the V element can also improve the high-temperature hardness of the material, the Ti element can also participate in the solidification process of the nitrogen element, the nitrogen hole resistance of the welding seam metal is improved, and the welding seam structure is refined; the Ni element and the Cr element with specific contents can improve the structure property of a welding seam and strengthen the low-temperature impact toughness of a welding joint; the Mo element with specific content can prevent tempering brittleness and overheating tendency, and improve high-temperature strength, creep strength, endurance strength and the like of the steel.
In a word, the design of the content of each component in the hot rolled wire rod realizes the synergistic complementation of the functions of each element in the steel, reduces the influence of inevitable welding harmful elements in the steel on the welding performance and the sensitivity of welding cracks, improves the strength and the wear resistance of the hot rolled wire rod steel for the welding wire, and meets the requirements of the hot rolled wire rod for the welding wire of 1000MPa grade high-strength wear-resistant steel on the strength and the high wear resistance of the steel.
Preferably, the mass ratio of the C element to the Mn element in the hot-rolled wire rod for the high-strength wear-resistant steel welding wire is 1: 8-10.
The C element can ensure the strength, hardness and wear resistance of the welding wire, the Mn element can increase the work hardening rate of the material, improve the toughness and hardness of steel and has a certain desulfurization effect, but more carbides are easily precipitated due to overhigh content of the C element, and the toughness of the material is reduced; the excessively high Mn element can increase the condensation shrinkage of steel and promote the generation tendency of thermal cracks; the content of the preferable C element and Mn element can improve the strength, the hardness and the wear resistance of the product and avoid the negative influence brought by the two elements.
The application also provides a production method of the hot-rolled wire rod for the high-strength wear-resistant steel welding wire, which specifically comprises the following steps:
s1: preparing a continuous casting billet containing the hot-rolled wire rod component for the high-strength wear-resistant steel welding wire;
s2: heating the continuous casting billet, descaling by high-pressure water, and then rolling;
s3: and after the rolling of the continuous casting billet is finished, cooling, spinning and collecting coils to obtain a hot rolled coil, and controlling the hot rolled coil to cool to obtain the hot rolled wire rod for the high-strength wear-resistant steel welding wire.
Preferably: and S1, the continuous casting slab is manufactured by continuously casting molten iron or semisteel after impurity removal and component adjustment smelting into molten steel, wherein the mass content of the S element in the molten iron or the semisteel is less than or equal to 0.040%.
Preferably, the deoxidizer selected in the smelting process of the molten steel in the S1 is one or more of ferromanganese, ferrosilicon and silicomanganese alloy, and does not contain an aluminum-containing deoxidizer.
The preferable deoxidizer composition can ensure the castability of molten steel while further adjusting the components of molten iron, reduce the inclusion of aluminum oxide in the molten steel, reduce the content of oxygen in the molten steel and control the content of oxygen below 20 ppm.
Preferably, the molten steel in S1 is electromagnetically stirred by a crystallizer during continuous casting, and the continuous casting drawing speed is 1.50m-1.70 m/min.
The optimized continuous casting mode and the continuous casting pulling speed can ensure the full precipitation of the inclusions in the molten steel, reduce the content of the inclusions in the casting blank, ensure the quality of the casting blank and avoid the occurrence of blank sticking or surface defects.
Preferably, the continuous casting slab is discharged after being heated to 1020-1080 ℃, and high-pressure water descaling is carried out.
Preferably, the rolling process in S2 includes rough rolling and finish rolling, wherein the rough rolling start temperature is 1000 ℃ to 1040 ℃, and the finish rolling end temperature is 1030 ℃ to 1060 ℃.
Preferably, the rolling temperature can further optimize the structure in the casting blank, refine grains, homogenize the core and the surface and further improve the toughness and the hardness of the product.
Preferably, the spinning temperature of the spinning process is 840-870 ℃.
Preferably, in S3, the hot-rolled wire rod is cooled by an online heat preservation method at a cooling speed of less than or equal to 0.12 ℃/S until the temperature is less than or equal to 120 ℃, and then the hot-rolled wire rod for the high-strength wear-resistant steel welding wire is obtained.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the welding process of the high-strength wear-resistant steel, the metal cladded by the existing welding wire cannot be matched with the 1000 Mpa-grade high-strength wear-resistant steel in hardness, strength and wear resistance, so that the welded high-strength wear-resistant steel has certain mechanical defects at a welding seam, and further popularization and application of the high-strength wear-resistant steel are hindered.
In order to make up for the vacancy of a high-strength wear-resistant steel welding wire product, make up for the mechanical defect of a high-strength wear-resistant steel welding line and further promote the application of high-strength wear-resistant steel, the application provides a hot-rolled wire rod for the high-strength wear-resistant steel welding wire, which comprises the following elements in percentage by mass, C: 0.18% -0.25%, Si: 1.10% -1.50%, Mn: 1.70% -2.00%, Ni: 1.50% -2.10%, Mo: 0.30-0.50%, Cr: 0.05% -0.15%, V: 0.02% -0.04%, N: 0.06% -0.09%, Ti: 0.05-0.08%, Zr: 0.03 to 0.07 percent, P: less than or equal to 0.01 percent, S: less than or equal to 0.008 percent, As: less than or equal to 0.01 percent, Sb: less than or equal to 0.01 percent, O: less than or equal to 0.005 percent, H: less than or equal to 0.0001 percent, and the balance being Fe. The basic concept is as follows: the design and adjustment of the types and the contents of the elements forming the hot-rolled wire rod are carried out, so that the synergistic complementation of the functions of the elements in the steel is realized, the strength and the wear resistance of the steel are improved, the adverse effect of a certain single element on the performance of the steel and the influence of inevitable welding harm elements in the steel on the welding performance and the crack sensitivity of the steel are reduced, the advantages of the elements are fully exerted, and the requirements of the obtained hot-rolled wire rod on the welding wire performance of the 1000Mpa high-strength wear-resistant steel can be met on the strength and the wear resistance.
In order to further ensure the strength, hardness and wear resistance of the product, avoid the influence of carbide precipitation on toughness and reduce the generation tendency of thermal cracks, the contents of C element and Mn element in the hot-rolled wire rod cannot be too low or too high, and the mass ratio of the C element to the Mn element is 1: 8-12.
In order to make the texture of the obtained hot-rolled wire rod more uniform and further improve the toughness, hardness and wear resistance of the product, the embodiment of the application also provides the production steps of the hot-rolled wire rod:
s1: molten iron or semisteel is selected for dephosphorization, desulfurization and deoxidation, and then molten steel components are adjusted to prepare a continuous casting billet containing the hot-rolled wire rod component for the high-strength wear-resistant steel welding wire;
s2: heating the continuous casting billet obtained in the S1, descaling with high pressure water to remove an oxide layer, and then rolling, wherein the rolling process comprises rough rolling and finish rolling;
s3: and (5) cooling, spinning and collecting the finish-rolled continuous casting billet obtained in the step (S2) to obtain a hot-rolled coil, and controlling the hot-rolled coil to cool to obtain the hot-rolled wire rod for the high-strength wear-resistant steel welding wire.
The S element belongs to harmful elements in the welding process, is easy to generate hot cracks in the welding process, increases the crack sensitivity of steel, and aims to keep the S element in molten steel below 0.008 percent and the content of the S element in molten iron or semi-steel less than or equal to 0.040 percent.
As an exemplary illustration, the deoxidation process in S1 may use one or more of ferromanganese, ferrosilicon, and silicomanganese, without using an aluminum-containing oxidant: on one hand, the oxygen element in the molten steel can be removed, on the other hand, the component content in the molten iron or the semi-steel can be further adjusted, on the other hand, the inclusion of alumina in the molten steel can be reduced, and the oxygen element content in the molten steel is controlled to be below 20 ppm.
In order to fully separate out the inclusion substances in the molten steel in the continuous casting process, further reduce the content of the inclusion substances in the casting blank, better shape the casting blank, avoid the occurrence of blank sticking, reduce surface defects and improve the quality of the casting blank, a crystallizer is adopted for electromagnetic stirring during the molten steel continuous casting in S1, and the drawing speed during the continuous casting is 1.50-1.70 m/min.
In order to ensure the internal structure of the casting blank, further refine the structure crystal grains in the casting blank, homogenize the structure of the core and the surface of the casting blank, and improve the toughness and the hardness of the product, the finish rolling and rough rolling temperature of the casting blank in S2 should be effectively controlled, wherein the rough rolling starting temperature is 1000-1040 ℃, and the finish rolling finishing temperature is 1030-1060 ℃.
In order to make the mechanical property of the hot-rolled wire rod more prominent and further improve the tensile strength, the yield strength and the impact resistance, the spinning temperature cannot be too low or too high, and through experimental investigation, under the condition of adopting the mass percentages of the elements in the application, the optimum spinning temperature is 840-870 ℃. The cooling rate of the hot rolled wire rod should not be too high, and should be kept below 0.12 ℃/s.
The hot-rolled wire rod prepared by adopting the mass percentages of the elements and the process parameters can be applied to welding of high-strength and high-wear-resistance steel.
In order to verify the performance of the hot-rolled wire rod for the high-strength wear-resistant steel welding wire provided by the application, the following tests are carried out: and (3) drawing, pickling and copper plating the prepared hot-rolled wire rod to prepare a welding wire with the diameter of 1.2mm, and testing the metal of the obtained welding wire after cladding by adopting a conventional method.
The invention is further illustrated below in the following examples.
Example 1
The embodiment provides a hot-rolled wire rod for a high-strength wear-resistant steel welding wire, which specifically comprises the following elements in percentage by mass: c: 0.18%, Si: 1.10%, Mn: 1.70%, Ni: 1.70%, Mo: 0.40%, Cr: 0.10%, V: 0.04%, N: 0.08%, Ti: 0.06%, Zr: 0.05%, P: 0.008%, S: 0.006%, As: 0.009%, Sb: 0.009%, O: 0.003%, H: 0.00005% and the balance Fe.
The production method of the hot-rolled wire rod for the high-strength wear-resistant steel welding wire specifically comprises the following steps:
s1: selecting vanadium-containing molten iron with the sulfur content of less than or equal to 0.040% to carry out vanadium extraction, dephosphorization, refining desulfurization, fine adjustment on molten steel components by using ferrosilicon deoxidizer and other alloys to obtain molten steel containing the elements, and carrying out continuous casting on the obtained molten steel at the drawing speed of 1.70m/min under the electromagnetic stirring state of a crystallizer to obtain a continuous casting blank;
s2: heating the continuous casting slab obtained in the step S1 to 1050 ℃ in a heating furnace, discharging the continuous casting slab out of the furnace, performing high-pressure water descaling, and performing rough rolling and finish rolling after removing a surface oxide layer; wherein the rough rolling starting temperature is 1010 ℃, and the finish rolling finishing temperature is 1030 ℃;
s3: and (4) cooling the finish-rolled continuous casting billet obtained in the step (S2) to 850 ℃ for spinning, collecting coils to obtain a hot-rolled wire rod, carrying out on-line heat preservation on the obtained hot-rolled wire rod, cooling the obtained hot-rolled wire rod in a mode of 0.1 ℃/S, cooling to 110 ℃, packaging and warehousing to obtain the hot-rolled wire rod for the high-strength wear-resistant steel welding wire.
Example 2
The embodiment provides a hot-rolled wire rod for a high-strength wear-resistant steel welding wire, which specifically comprises the following elements in percentage by mass: c: 0.22%, Si: 1.19%, Mn: 1.86%, Ni: 1.80%, Mo: 0.50%, Cr: 0.12%, V: 0.031%, N: 0.07%, Ti: 0.07%, Zr: 0.06%, P: 0.008%, S: 0.003%, As: 0.008%, Sb: 0.009%, O: 0.003%, H: 0.00005% and the balance Fe.
The production method of the hot-rolled wire rod for the high-strength wear-resistant steel welding wire specifically comprises the following steps:
s1: selecting semisteel with the sulfur content of less than or equal to 0.040% for dephosphorization, refining desulfurization, finely adjusting the components of the molten steel by using a ferromanganese deoxidizer and other alloys to obtain the molten steel containing the elements, and continuously casting the obtained molten steel at the drawing speed of 1.60m/min under the electromagnetic stirring state of a crystallizer to obtain a continuous casting blank;
s2: heating the continuous casting slab obtained in the step S1 to 1050 ℃ in a heating furnace, discharging the continuous casting slab out of the furnace, performing high-pressure water descaling, and performing rough rolling and finish rolling after removing a surface oxide layer; wherein the rough rolling starting temperature is 1020 ℃, and the finish rolling finishing temperature is 1020 ℃;
s3: and (4) cooling the finish-rolled continuous casting billet obtained in the step (S2) to 860 ℃ for spinning, collecting coils to obtain a hot-rolled wire rod, carrying out on-line heat preservation on the obtained hot-rolled wire rod, cooling the obtained hot-rolled wire rod in a mode of 0.11 ℃/S, cooling to 110 ℃, packaging and warehousing to obtain the hot-rolled wire rod for the high-strength wear-resistant steel welding wire.
Example 3
The embodiment provides a hot-rolled wire rod for a high-strength wear-resistant steel welding wire, which specifically comprises the following elements in percentage by mass: c: 0.23%, Si: 1.39%, Mn: 1.94%, Ni: 1.80%, Mo: 0.45%, Cr: 0.12%, V: 0.035%, N: 0.07%, Ti: 0.07%, Zr: 0.06%, P: 0.008%, S: 0.006%, As: 0.008%, Sb: 0.009%, O: 0.004%, H: 0.00006% and the balance Fe.
The production method of the hot-rolled wire rod for the high-strength wear-resistant steel welding wire specifically comprises the following steps:
s1: selecting semisteel with the sulfur content of less than or equal to 0.040% for dephosphorization, refining desulfurization, and finely adjusting the components of the molten steel by using a silicomanganese deoxidizer and other alloy components to obtain molten steel containing the elements, and continuously casting the obtained molten steel at the drawing speed of 1.70m/min under the electromagnetic stirring state of a crystallizer to obtain a continuous casting blank;
s2: heating the continuous casting slab obtained in the step S1 to 1060 ℃ in a heating furnace, discharging the continuous casting slab out of the furnace, removing scale by high-pressure water, and performing rough rolling and finish rolling after removing a surface oxide layer; wherein the rough rolling starting temperature is 1030 ℃, and the finish rolling finishing temperature is 1050 ℃;
s3: and (4) cooling the finish-rolled continuous casting billet obtained in the step (S2) to 850 ℃ for spinning, collecting coils to obtain a hot-rolled wire rod, carrying out on-line heat preservation on the obtained hot-rolled wire rod, cooling the obtained hot-rolled wire rod in a mode of 0.11 ℃/S, cooling to 115 ℃, packaging and warehousing, and thus obtaining the hot-rolled wire rod for the high-strength wear-resistant steel welding wire.
Example 4
The embodiment provides a hot-rolled wire rod for a high-strength wear-resistant steel welding wire, which specifically comprises the following elements in percentage by mass: c: 0.21%, Si: 1.50%, Mn: 1.70%, Ni: 1.70%, Mo: 0.40%, Cr: 0.10%, V: 0.02%, N: 0.08%, Ti: 0.06%, Zr: 0.05%, P: 0.008%, S: 0.004%, As: 0.009%, Sb: 0.009%, O: 0.003%, H: 0.00005% and the balance Fe.
The production method of the hot-rolled wire rod for the high-strength wear-resistant steel welding wire specifically comprises the following steps:
s1: selecting vanadium-containing molten iron with the sulfur content of less than or equal to 0.040% to carry out vanadium extraction, dephosphorization, refining desulfurization, fine adjustment on molten steel components by using ferrosilicon and ferromanganese deoxidizers and other alloy components to obtain molten steel containing the elements, and carrying out continuous casting on the obtained molten steel at the drawing speed of 1.60m/min under the electromagnetic stirring state of a crystallizer to obtain a continuous casting blank;
s2: heating the continuous casting billet obtained in the step S1 to 1070 ℃ in a heating furnace, discharging the continuous casting billet out of the furnace, removing scales on the surface of the continuous casting billet by high-pressure water, and then performing rough rolling and finish rolling; wherein the rough rolling starting temperature is 1040 ℃, and the finish rolling finishing temperature is 1050 ℃;
s3: and (4) cooling the finish-rolled continuous casting billet obtained in the step (S2) to 855 ℃, spinning, collecting coils to obtain a hot-rolled wire rod, carrying out on-line heat preservation on the obtained hot-rolled wire rod, cooling in a mode of 0.12 ℃/S, cooling to 115 ℃, packaging and warehousing to obtain the hot-rolled wire rod for the high-strength wear-resistant steel welding wire.
Comparative example 1
The comparative example provides a hot-rolled wire rod for a steel welding wire, which specifically comprises the following elements in percentage by mass: c: 0.18%, Si: 1.10%, Mn: 1.70%, Ni: 1.70%, Mo: 0.40%, Cr: 0.10%, V: 0.04%, N: 0.08%, Ti: 0.11%, P: 0.008%, S: 0.006%, As: 0.009%, Sb: 0.009%, O: 0.003%, H: 0.00005% and the balance Fe.
The production method of the hot rolled wire rod for steel welding wire was kept in accordance with example 1.
Comparative example 2
The comparative example provides a hot-rolled wire rod for a steel welding wire, which specifically comprises the following elements in percentage by mass:
c: 0.18%, Si: 1.10%, Mn: 1.70%, Ni: 1.70%, Mo: 0.40%, Cr: 0.10%, V: 0.07%, N: 0.08%, Ti: 0.08%, P: 0.008%, S: 0.006%, As: 0.009%, Sb: 0.009%, O: 0.003%, H: 0.00005% and the balance Fe.
The production method of the hot rolled wire rod for steel welding wire was kept in accordance with example 1.
Comparative example 3
The comparative example provides a hot-rolled wire rod for a steel welding wire, which specifically comprises the following elements in percentage by mass:
c: 0.18%, Si: 1.10%, Mn: 2.00%, Ni: 1.70%, Mo: 0.40%, Cr: 0.10%, V: 0.040%, N: 0.080%, Ti: 0.060%, Zr: 0.05%, P: 0.008%, S: 0.008%, As: 0.009%, Sb: 0.009%, O: 0.003%, H: 0.00005% and the balance Fe.
Comparative example 4
This comparative example provides a hot rolled wire rod for a steel welding wire having the same element contents as those of example 1, and exactly the same process parameters as example 1 except that the spinning temperature in S3 was 800 ℃.
Comparative example 5
This comparative example provides a hot rolled wire rod for a steel welding wire having the same element contents as those of example 1, and exactly the same process parameters as example 1 except that the cooling rate of the hot rolled wire rod in S3 was 0.20 ℃/S in terms of production method.
Example of detection
The hot-rolled wire rods obtained in examples 1 to 4 and comparative examples 1 to 5 are made into welding wires with the diameter of 1.2mm after being drawn, pickled and plated with copper, the performance of the metal after cladding of the obtained welding wires is detected, and the mechanical properties of the obtained cladding metal are shown in table 1:
TABLE 1 mechanical Properties of the metal after welding wire cladding
According to the detection data in table 1, it can be seen that: the tensile strength of the welding wire cladding metal made of the hot rolled wire rod for the high-strength wear-resistant steel welding wire obtained by the embodiment of the invention is more than or equal to 1100MPa, the yield strength is more than or equal to 730MPa, the post-fracture elongation of the cladding metal is more than or equal to 14%, and the impact resistance at minus 40 ℃ is more than or equal to 130J.
The above description is only exemplary of the present invention and should not be taken as limiting, and any modifications, equivalents, improvements, etc. that are made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The hot-rolled wire rod for the high-strength wear-resistant steel welding wire is characterized by comprising the following elements in percentage by mass: c: 0.18% -0.25%, Si: 1.10% -1.50%, Mn: 1.70% -2.00%, Ni: 1.50% -2.10%, Mo: 0.30-0.50%, Cr: 0.05% -0.15%, V: 0.02% -0.04%, N: 0.06% -0.09%, Ti: 0.05-0.08%, Zr: 0.03 to 0.07 percent, P: less than or equal to 0.01 percent, S: less than or equal to 0.008 percent, As: less than or equal to 0.01 percent, Sb: less than or equal to 0.01 percent, O: less than or equal to 0.005 percent, H: less than or equal to 0.0001 percent, and the balance being Fe.
2. The hot-rolled wire rod for the high-strength wear-resistant steel welding wire according to claim 1, wherein the mass ratio of the C element to the Mn element in the hot-rolled wire rod for the high-strength wear-resistant steel welding wire is 1: 8-10.
3. The hot-rolled wire rod for the high-strength wear-resistant steel welding wire according to claim 1 or 2, wherein the production method of the hot-rolled wire rod specifically comprises the following steps:
s1: preparing a continuous casting billet containing the hot-rolled wire rod component for the high-strength wear-resistant steel welding wire;
s2: heating the continuous casting billet, descaling by high-pressure water, and then rolling;
s3: and after the rolling of the continuous casting billet is finished, cooling, spinning and collecting coils to obtain a hot rolled coil, and controlling the hot rolled coil to cool to obtain the hot rolled wire rod for the high-strength wear-resistant steel welding wire.
4. The hot-rolled wire rod for the high-strength wear-resistant steel welding wire according to claim 3, wherein the continuous casting billet in the step S1 is manufactured by continuously casting molten iron or semisteel after impurity removal and component adjustment smelting into molten steel, wherein the mass content of S element in the molten iron or the semisteel is less than or equal to 0.040%.
5. The hot-rolled wire rod for the high-strength wear-resistant steel welding wire according to claim 4, wherein the deoxidizer selected in the smelting process of the molten steel in the step S1 is one or more of ferromanganese, ferrosilicon and silicomanganese, and does not contain an aluminum-containing deoxidizer.
6. The hot-rolled wire rod for the high-strength wear-resistant steel welding wire according to claim 4, wherein the molten steel is electromagnetically stirred by a crystallizer during continuous casting in S1, and the continuous casting drawing speed is 1.50 m/min to 1.70 m/min.
7. The hot-rolled wire rod for a high-strength wear-resistant steel welding wire according to claim 3, wherein the rolling process in S2 comprises rough rolling and finish rolling, wherein the rough rolling start temperature is 1000 ℃ to 1040 ℃, and the finish rolling end temperature is 1030 ℃ to 1060 ℃.
8. The hot-rolled wire rod for the high-strength wear-resistant steel welding wire according to claim 3, wherein the spinning temperature of the spinning process in S3 is 840 ℃ to 870 ℃.
9. The hot-rolled wire rod for the high-strength wear-resistant steel welding wire according to claim 3, wherein in the step S3, the hot-rolled wire rod is subjected to temperature-controlled cooling in an online heat preservation mode, the cooling speed is less than or equal to 0.12 ℃/S, and the hot-rolled wire rod for the high-strength wear-resistant steel welding wire is obtained after the hot-rolled wire rod is cooled to the temperature of less than or equal to 120 ℃.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113546962A (en) * | 2021-06-21 | 2021-10-26 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Production method of corrosion-resistant wire rod for winding steel wire on bridge main cable |
| CN114318154A (en) * | 2021-12-29 | 2022-04-12 | 本钢板材股份有限公司 | High-cleanliness welding wire steel L-S3 and preparation method thereof |
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| JPH07195193A (en) * | 1993-12-29 | 1995-08-01 | Kobe Steel Ltd | Solid wire for thin sheet of high tension steel |
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| CN113546962A (en) * | 2021-06-21 | 2021-10-26 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Production method of corrosion-resistant wire rod for winding steel wire on bridge main cable |
| CN114318154A (en) * | 2021-12-29 | 2022-04-12 | 本钢板材股份有限公司 | High-cleanliness welding wire steel L-S3 and preparation method thereof |
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Application publication date: 20211022 |