CN113667889A - High-strength wear-resistant corrosion-resistant sink roller and production method thereof - Google Patents
High-strength wear-resistant corrosion-resistant sink roller 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
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- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
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- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
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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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
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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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
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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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/38—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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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
- C23C2/003—Apparatus
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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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Abstract
The invention discloses a high-strength wear-resistant corrosion-resistant sink roller and a production method thereof, wherein a sink roller matrix comprises the following components in percentage by weight: c is more than or equal to 0.15 percent and less than or equal to 0.20 percent, Si is more than or equal to 0.5 percent and less than or equal to 0.3 percent, Mn is more than or equal to 0.5 percent and less than or equal to 0.5 percent, Cr is more than or equal to 10.0 percent and less than or equal to 12.0 percent, Ni is more than or equal to 6.5 percent and less than or equal to 8.0 percent, W is more than or equal to 4.0 percent and less than or equal to 5.0 percent, Ti is more than or equal to 1.0 percent and less than or equal to 2.0 percent, P is less than 0.025 percent, S is less than 0.025 percent, and the balance is Fe and inevitable impurities. According to the invention, the sink roll with high strength, high hardness and excellent corrosion resistance is successfully prepared by strictly controlling the content of each chemical component and the process parameters of the preparation process, and the kind and the content of alloy elements in the material are low, so that the production cost of the sink roll is obviously reduced, and the sink roll has high popularization and application values.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a high-strength wear-resistant corrosion-resistant sink roller and a production method thereof.
Background
At present, most of anticorrosive steel products in the world are subjected to hot galvanizing or hot aluminizing. Hot dip galvanizing or hot dip aluminizing has become the most basic and most widely applied method in the corrosion prevention of steel and is widely applied to the production of steel plates, steel strips, steel wires, steel pipes, steel nets and hardware parts. The sink roll is one of important devices on a hot galvanizing production line, wherein the thickness of strip steel of the hot substrate galvanizing production line is larger, and the tension of the strip steel is 2-3 times of that of the common cold rolling galvanizing production line. Therefore, the sink roll used in the hot substrate galvanizing line needs to have high strength, hardness and corrosion resistance to prevent deformation, severe abrasion, corrosion and the like of the strip steel during use.
However, the conventional sink roll for the cold-rolling hot-galvanizing production line usually selects 316L steel with excellent zinc liquid corrosion resistance as a roll body material, and the material has the problems of low strength, insufficient wear resistance and the like, and cannot meet the working condition requirement of large tension of the hot substrate galvanizing production line. In order to further increase the strength and corrosion resistance of the sink roll, some enterprises select to increase noble alloy elements such as Nb and V, and the production cost is high. Therefore, it is very important to develop a hot-substrate galvanizing sink roll with high strength, high hardness and corrosion resistance at low cost.
Disclosure of Invention
Aiming at the problem that the strength, hardness and corrosion resistance of the existing galvanized sink roll for the hot substrate are still to be further improved, the invention provides a high-strength wear-resistant corrosion-resistant sink roll and a production method thereof.
In order to solve the technical problem, the embodiment of the invention provides the following technical scheme:
the high-strength wear-resistant corrosion-resistant sink roller comprises a base body and is characterized in that the base body comprises the following components in percentage by weight: c is more than or equal to 0.15 percent and less than or equal to 0.20 percent, Si is more than or equal to 0.5 percent and less than or equal to 0.3 percent, Mn is more than or equal to 0.5 percent and less than or equal to 0.5 percent, Cr is more than or equal to 10.0 percent and less than or equal to 12.0 percent, Ni is more than or equal to 6.5 percent and less than or equal to 8.0 percent, W is more than or equal to 4.0 percent and less than or equal to 5.0 percent, Ti is more than or equal to 1.0 percent and less than or equal to 2.0 percent, P is less than 0.025 percent, S is less than 0.025 percent, and the balance is Fe and inevitable impurities.
According to the high-strength wear-resistant corrosion-resistant sink roller provided by the invention, the Cr element and the C are added to form a chromium carbide strengthening phase, so that the sink roller is strengthened and hardened, the wear resistance of the sink roller is improved, and the room-temperature and high-temperature mechanical properties and the corrosion resistance of the sink roller can be improved; adding Ni element to improve the strength and hardness of the sink roll; ti and W are added to form carbide with C, so that the problem of intergranular corrosion caused by precipitation of chromium carbide is prevented, and Fe can be dispersed and precipitated from Ti2T intermetallic compound, thereby remarkably improving the high temperature strength of the sink roll. The invention has less alloy element types and low content, obviously reduces the production cost of the sink roll, and the components are matched with each other according to specific proportion, the tensile strength of the prepared sink roll is more than or equal to 720MPa, and the yield strength of the sink roll is more than or equal to 720MPaThe hardness is higher than HB300 and the corrosion resistance is obviously higher than that of 316L steel through a corrosion test.
Preferably, the metallographic structure of the sink roll base body is martensite.
The invention also provides a production method of the high-strength wear-resistant corrosion-resistant sink roller, which comprises the following steps:
smelting the raw materials to obtain a smelting solution; deoxidizing the molten steel, and tapping after the molten steel reaches the tapping temperature;
casting and forming the molten steel under the protection of inert atmosphere by a centrifugal casting method to obtain a cast ingot;
and annealing, cooling and welding the cast ingot to obtain the sink roll.
The preparation method of the sink roll provided by the invention is simple in process, strong in operability and convenient for realizing industrial production.
Preferably, the production method of the high-strength wear-resistant corrosion-resistant sink roll specifically comprises the following steps:
step a, melting ferrochrome in an intermediate frequency furnace, then sequentially adding ferronickel, carbon powder and carbon steel for melting, performing primary slagging after the melting is finished, then heating to 1600-1650 ℃, adding ferrotungsten and titanium powder for continuous melting to obtain a molten liquid;
b, slagging the smelting liquid again, adding a calcium-silicon alloy for deoxidation after slagging is finished, and then heating to 1630-1680 ℃ to obtain a casting liquid;
step c, casting the casting liquid into a casting mold by a centrifugal casting method in an inert atmosphere, and demolding to obtain a cast ingot;
and d, annealing, cooling and welding the cast ingot to obtain the sink roll.
Preferably, in the step a, the smelting temperature is 1480-1500 ℃.
Preferably, in the step b, the adding amount of the silicon-calcium alloy is 0.3-0.5% of the mass of the smelting solution.
The preferable addition amount of the silicon-calcium alloy is beneficial to fully deoxidizing the smelting liquid and improving the form and distribution of inclusions, thereby being beneficial to improving the mechanical property of the sink roll.
Optionally, slagging in the step a and the step b is carried out by adopting a conventional method in the field, for example, limestone and dolomite are added into molten steel for slagging, and the addition amount of slagging materials can be selected by a person skilled in the art in a conventional way.
Preferably, in step c, the rotational speed of centrifugal casting is 1000r/min-1200 r/min.
The optimized centrifugal rotating speed is beneficial to reducing the segregation problem of metal carbide, is also beneficial to reducing the defects of air holes, shrinkage cavities, impurities and the like, and improves the mold filling capacity of metal.
Optionally, the casting mold is preheated to 200 ℃ to 250 ℃ prior to casting.
The casting is carried out at the temperature of 200-250 ℃, so that not only can enough chilling action be ensured, and uniform and fine tissues can be obtained, but also the phenomenon that the casting liquid is cooled too fast to cause cracks can be avoided.
Preferably, in the step c, the mold can be removed by standing and cooling for 30-40 min after the casting is finished.
Optionally, in the step c, a machining allowance is reserved for the size of the casting mold according to the size of the sink roll, and a 10mm allowance is reserved for a single edge of an inner hole of the casting mold.
Preferably, in the step d, the annealing temperature is 600-620 ℃, and the annealing time is 4-6 h.
The optimized annealing temperature is beneficial to reducing the internal stress of the sink roll material, so that the creep resistance of the sink roll material is improved, the growth of crystal grains can be avoided, and a fine and uniform structure of the crystal grains is obtained.
Preferably, in step d, the cooling is performed by furnace cooling.
The preferable cooling mode is favorable for inhibiting the growth of crystal grains and obtaining an ideal martensite structure, thereby improving the strength and the hardness of the material.
Optionally, in the step d, the shaft body and the shaft head are welded by argon arc welding.
The sink roll prepared by the invention has the tensile strength of more than or equal to 720MPa, the yield strength of more than or equal to 550MPa, the hardness of more than HB300, high strength, good wear resistance and excellent corrosion resistance, effectively prolongs the service life of the sink roll, simultaneously has less alloy types and content, reduces the manufacturing cost of the sink roll, and has higher popularization and application values.
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 order to better illustrate the invention, the following examples are given by way of further illustration.
Example 1
The embodiment of the invention provides a high-strength wear-resistant corrosion-resistant sink roller, which comprises the following components in percentage by weight: 0.15% of C, 0.4% of Si, 0.5% of Mn, 10.0% of Cr, 8.0% of Ni, 4.0% of W, 2.0% of Ti, 0.023% of P, 0.019% of S, and the balance of Fe and inevitable impurities.
The preparation steps of the high-strength wear-resistant corrosion-resistant sink roller are as follows:
step a, manufacturing a casting mold: the casting mold reserves a machining allowance according to the size of the sink roll, and a 10mm allowance is reserved on the single side of an inner hole of the casting mold;
b, melting ferrochrome in an intermediate frequency furnace, then sequentially adding ferronickel, carbon powder and carbon steel for melting, controlling the melting temperature to 1480 ℃, stopping the furnace for primary slagging after the temperature reaches, raising the melting temperature to 1630 ℃ after slagging is finished, then adding ferrotungsten and titanium powder for continuous melting, sampling and testing, and obtaining a molten liquid after chemical components are qualified;
c, slagging the smelting liquid again, adding a calcium-silicon alloy with the mass of 0.5% of that of the smelting liquid after slagging is finished to deoxidize, and then heating the smelting temperature to 1650 ℃ again to obtain a casting liquid;
step d, casting the casting liquid into a casting mold preheated to 250 ℃ by a centrifugal casting method under an inert atmosphere, controlling the centrifugal rotating speed to be 1100r/min, standing for 40min after casting, demolding, cleaning residual roots, fins and burrs, and then performing rough machining to obtain a cast ingot;
step e, placing the cast ingot in a heating furnace for annealing, keeping the annealing temperature at 620 ℃, preserving the heat for 4 hours, and cooling along with the furnace to obtain a roller body of the sink roller;
and f, machining the roller body and the shaft head, and welding the roller body and the shaft head through argon arc welding to obtain the sink roller.
And (3) detecting the mechanical property of the prepared sink roller by adopting a GB/T228.1-2010 standard, wherein the detection result is as follows: the yield strength is 580MPa, the tensile strength is 850MPa, and the hardness is 280 HB.
And (3) corrosion performance testing: 3.5 wt% NaCl solution with pH 7.5 is prepared according to the national standard GB/T157488-95 to simulate the electrochemical corrosion performance of the test steel. The corrosion sample is processed into a round shape with an exposed area of 1cm2The sample is polished by test paper No. 1200, then polished into a mirror surface, soaked in the NaCl solution for 30min, and the open-circuit potential, the polarization curve and the corrosion potential are measured by a three-electrode system. The test results are shown in table 1.
TABLE 1
| Test specimen | Corrosion potential/V | Corrosion current density/A.cm-2 | Relative corrosion |
| Example 1 | -0.325 | 3.863×10-5 | 1 |
| 316L | -0.456 | 5.640×10-5 | 1.46 |
Example 2
The embodiment of the invention provides a high-strength wear-resistant corrosion-resistant sink roller, which comprises the following components in percentage by weight: 0.18% of C, 0.5% of Si, 0.4% of Mn, 11.0% of Cr, 7.0% of Ni, 4.5% of W, 1.5% of Ti, 0.021% of P, 0.022% of S, and the balance of Fe and inevitable impurities. .
The preparation steps of the high-strength wear-resistant corrosion-resistant sink roller are as follows:
step a, manufacturing a casting mold: the casting mold reserves a machining allowance according to the size of the sink roll, and a 10mm allowance is reserved on the single side of an inner hole of the casting mold;
b, melting ferrochrome in an intermediate frequency furnace, then sequentially adding ferronickel, carbon powder and carbon steel for melting, controlling the melting temperature to be 1490 ℃, stopping the furnace for primary slagging after the temperature is reached, raising the melting temperature to 1600 ℃ after slagging is finished, then adding ferrotungsten and titanium powder for continuous melting, sampling and testing, and obtaining a molten liquid after chemical components are qualified;
c, slagging the smelting liquid again, adding a calcium-silicon alloy accounting for 0.3 percent of the mass of the smelting liquid after slagging is finished to deoxidize, and then heating the smelting temperature to 1630 ℃ again to obtain a casting liquid;
step d, casting the casting liquid into a casting mold preheated to 200 ℃ by a centrifugal casting method under an inert atmosphere, controlling the centrifugal rotation speed to be 1200r/min, standing for 30min after casting, demolding, cleaning residual roots, fins and burrs, and then performing rough machining to obtain a cast ingot;
step e, placing the cast ingot in a heating furnace for annealing, keeping the annealing temperature at 610 ℃ for 5 hours, and cooling along with the furnace to obtain a roller body of the sink roller;
and f, machining the roller body and the shaft head, and welding the roller body and the shaft head through argon arc welding to obtain the sink roller.
And (3) detecting the mechanical property of the prepared sink roller by adopting a GB/T228.1-2010 standard, wherein the detection result is as follows: the yield strength is 650MPa, the tensile strength is 800MPa, and the hardness is 300 HB.
And (3) corrosion performance testing: 3.5 wt% NaCl solution with pH 7.5 is prepared according to the national standard GB/T157488-95 to simulate the electrochemical corrosion performance of the test steel. The corrosion sample is processed into a round shape with an exposed area of 1cm2The sample is polished by test paper No. 1200, then polished into a mirror surface, soaked in the NaCl solution for 30min, and the open-circuit potential, the polarization curve and the corrosion potential are measured by a three-electrode system. The test results are shown in table 2.
TABLE 2
| Test specimen | Corrosion potential/V | Corrosion current density/A.cm-2 | Relative corrosion |
| Example 1 | -0.318 | 3.764×10-5 | 1 |
| 316L | -0.456 | 5.640×10-5 | 1.50 |
Example 3
The embodiment of the invention provides a high-strength wear-resistant corrosion-resistant sink roller, which comprises the following components in percentage by weight: 0.20% of C, 0.3% of Si, 0.3% of Mn, 12.0% of Cr, 6.5% of Ni, 5.0% of W, 1.0% of Ti, 0.022% of P, 0.018% of S and the balance of Fe and inevitable impurities. .
The preparation steps of the high-strength wear-resistant corrosion-resistant sink roller are as follows:
step a, manufacturing a casting mold: the casting mold reserves a machining allowance according to the size of the sink roll, and a 10mm allowance is reserved on the single side of an inner hole of the casting mold;
b, melting ferrochrome in an intermediate frequency furnace, then sequentially adding ferronickel, carbon powder and carbon steel for melting, controlling the melting temperature to be 1500 ℃, stopping the furnace for primary slagging after the temperature reaches, raising the melting temperature to 1650 ℃ after slagging is finished, then adding ferrotungsten and titanium powder for continuous melting, sampling and testing, and obtaining a melting liquid after chemical components are qualified;
c, slagging the smelting liquid again, adding a calcium-silicon alloy with the mass of 0.4% of that of the smelting liquid after slagging is finished to deoxidize, and then heating the smelting temperature to 1680 ℃ again to obtain a casting liquid;
step d, casting the casting liquid into a casting mold preheated to 230 ℃ by a centrifugal casting method under an inert atmosphere, controlling the centrifugal rotating speed to be 1000r/min, standing for 35min after casting is finished, demolding, cleaning residual roots, fins and burrs, and then performing rough machining to obtain a cast ingot;
step e, placing the cast ingot in a heating furnace for annealing, keeping the annealing temperature at 600 ℃ for 6 hours, and cooling along with the furnace to obtain a roller body of the sink roller;
and f, machining the roller body and the shaft head, and welding the roller body and the shaft head through argon arc welding to obtain the sink roller.
And (3) detecting the mechanical property of the prepared sink roller by adopting a GB/T228.1-2010 standard, wherein the detection result is as follows: the yield strength is 620MPa, the tensile strength is 810MPa, and the hardness is 290 HB.
And (3) corrosion performance testing: 3.5 wt% NaCl solution with pH 7.5 was prepared according to national standard GB/T157488-95, and simulated test was carried outElectrochemical corrosion properties of steel. The corrosion sample is processed into a round shape with an exposed area of 1cm2The sample is polished by test paper No. 1200, then polished into a mirror surface, soaked in the NaCl solution for 30min, and the open-circuit potential, the polarization curve and the corrosion potential are measured by a three-electrode system. The test results are shown in table 3.
TABLE 3
| Test specimen | Corrosion potential/V | Corrosion current density/A.cm-2 | Relative corrosion |
| Example 1 | -0.321 | 3.796×10-5 | 1 |
| 316L | -0.456 | 5.640×10-5 | 1.49 |
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The high-strength wear-resistant corrosion-resistant sink roller is characterized in that a matrix comprises the following components in percentage by weight: c is more than or equal to 0.15 percent and less than or equal to 0.20 percent, Si is more than or equal to 0.5 percent and less than or equal to 0.3 percent, Mn is more than or equal to 0.5 percent and less than or equal to 0.5 percent, Cr is more than or equal to 10.0 percent and less than or equal to 12.0 percent, Ni is more than or equal to 6.5 percent and less than or equal to 8.0 percent, W is more than or equal to 4.0 percent and less than or equal to 5.0 percent, Ti is more than or equal to 1.0 percent and less than or equal to 2.0 percent, P is less than 0.025 percent, S is less than 0.025 percent, and the balance is Fe and inevitable impurities.
2. The high strength wear and corrosion resistant sink roll of claim 1 wherein the metallographic structure of the sink roll body is martensitic.
3. A method for producing a high-strength wear-resistant corrosion-resistant sink roll according to claim 1 or 2, comprising the steps of:
smelting the raw materials to obtain a smelting solution; deoxidizing the molten steel, and tapping after the molten steel reaches the tapping temperature;
casting and forming the molten steel under the protection of inert atmosphere by a centrifugal casting method to obtain a cast ingot;
and annealing, cooling and welding the cast ingot to obtain the sink roll.
4. The method for producing a high-strength wear-resistant corrosion-resistant sink roll according to claim 3, comprising the steps of:
step a, melting ferrochrome in an intermediate frequency furnace, then sequentially adding ferronickel, carbon powder and carbon steel for melting, performing primary slagging after the melting is finished, then heating to 1600-1650 ℃, adding ferrotungsten and titanium powder for continuous melting to obtain a molten liquid;
b, slagging the smelting liquid again, adding a calcium-silicon alloy for deoxidation after slagging is finished, and then heating to 1630-1680 ℃ to obtain a casting liquid;
step c, casting the casting liquid into a casting mold by a centrifugal casting method in an inert atmosphere, and demolding to obtain a cast ingot;
and d, annealing, cooling and welding the cast ingot to obtain the sink roll.
5. The method for producing a high-strength wear-resistant corrosion-resistant sink roll as claimed in claim 4, wherein the melting temperature in step a is 1480-1500 ℃.
6. The method for producing a high-strength wear-resistant corrosion-resistant sink roll as claimed in claim 4, wherein in the step b, the amount of the silicon-calcium alloy added is 0.3-0.5% by mass of the molten metal.
7. The method for producing a high-strength wear-resistant corrosion-resistant sink roll according to claim 4, wherein in the step c, the rotational speed of the centrifugal casting is 1000r/min to 1200 r/min.
8. The method for producing a high-strength wear-resistant corrosion-resistant sink roll according to claim 4, wherein in the step c, the die is removed by standing and cooling for 30-40 min after the casting is finished.
9. The method for producing a high-strength wear-resistant corrosion-resistant sink roll according to claim 4, wherein in the step d, the annealing temperature is 600 ℃ to 620 ℃ and the annealing time is 4h to 6 h.
10. The method for producing a high-strength abrasion-resistant corrosion-resistant sink roll according to claim 4, wherein in the step d, the cooling is performed by furnace cooling.
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| CN112195418A (en) * | 2020-09-29 | 2021-01-08 | 中国科学院金属研究所 | Micro-nanocrystalline maraging stainless steel and preparation method thereof |
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