CN114959473B - Steel for bulldozer thrust wheel and production method thereof - Google Patents
Steel for bulldozer thrust wheel and production method thereof Download PDFInfo
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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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
- C21D1/28—Normalising
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- C—CHEMISTRY; METALLURGY
- 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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- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
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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
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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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
- C22C38/18—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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- 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
- C22C38/18—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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Abstract
The invention discloses steel for a bulldozer thrust wheel and a production method thereof, wherein the steel for the bulldozer thrust wheel comprises the following chemical components in percentage by mass: 0.39 to 0.43 percent of C, 0.23 to 0.35 percent of Si, 1.68 to 1.78 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.020 percent of S, 0.015 to 0.030 percent of Al, 0.12 to 0.17 percent of Cr, less than or equal to 0.10 percent of Mo, less than or equal to 0.15 percent of Cu, less than or equal to 0.20 percent of Ni, less than or equal to 0.0005 percent of B, less than or equal to 2.0ppm of [ H ] [ O ] < 20ppm, [ N ] < 80ppm, and the balance of Fe and unavoidable impurities.
Description
Technical Field
The invention belongs to the technical field of steel rolling, and particularly relates to steel for a bulldozer thrust wheel and a production method thereof.
Background
The crawler dozer running mechanism (thrust wheel) carries the entire weight of the dozer and takes on the running function of the dozer. The main form of damage is wear, for example, due to contact with the raceway surface of the caterpillar link, embodied as: a reduction in outer flange diameter; the diameter of the raceway surface is reduced; a reduction in diameter of the double-sided inner flange; a reduction in width of the double-sided inner flange; the width of the outer flange decreases.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides steel for a bulldozer thrust wheel, which comprises the following chemical components in percentage by mass: 0.39 to 0.43 percent of C, 0.23 to 0.35 percent of Si, 1.68 to 1.78 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.020 percent of S, 0.015 to 0.030 percent of Al, 0.12 to 0.17 percent of Cr, less than or equal to 0.10 percent of Mo, less than or equal to 0.15 percent of Cu, less than or equal to 0.20 percent of Ni, less than or equal to 0.0005 percent of B, less than or equal to 2.0ppm of [ H ] [ O ] < 20ppm, [ N ] < 80ppm, and the balance of Fe and unavoidable impurities.
The mechanical properties of the steel for the bulldozer thrust wheel after heat treatment meet the following conditions: the normal temperature impact energy is more than 80J, the Brinell hardness is more than 219HB, the tensile strength is more than 1127MPa, and the yield strength is more than 990 MPa.
The conditions of the heat treatment are as follows: oil quenching at 880+/-5 ℃ and tempering water quenching at 560+/-5 ℃.
The invention also provides a production method of the steel for the bulldozer thrust wheel, which comprises the following steps: continuous casting, heating and rolling; wherein:
the steel sample for continuous casting comprises the following chemical components in percentage by mass: 0.39 to 0.43 percent of C, 0.23 to 0.35 percent of Si, 1.68 to 1.78 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.020 percent of S, 0.015 to 0.030 percent of Al, 0.12 to 0.17 percent of Cr, less than or equal to 0.10 percent of Mo, less than or equal to 0.15 percent of Cu, less than or equal to 0.20 percent of Ni, less than or equal to 0.0005 percent of B, less than or equal to 2.0ppm of [ H ] < 20ppm of [ O ] < 80ppm of [ N ], and the balance of Fe and unavoidable impurities;
the heating system is as follows: the preheating section is 760-850 ℃, and the preheating time is more than or equal to 45min; heating the section I to 1060-1140 ℃ and the section II to 1130-1220 ℃ for more than or equal to 90min; the soaking time is more than or equal to 45min at 1130-1180 ℃ in the soaking section;
the rolling process comprises the following steps: the heated continuous casting billet adopts a rolling process of a phi 850 cogging machine and a phi 700mm multiplied by 3 plus phi 550mm multiplied by 4 continuous rolling mill, wherein the initial rolling temperature of the phi 850 cogging machine is controlled to 1050-1140 ℃, the initial rolling temperature of the phi 700mm multiplied by 3 plus phi 550mm multiplied by 4 continuous rolling mill is controlled to 1020-1050 ℃, the final rolling temperature is controlled to 870-910 ℃, a cooling bed adopts a close-packed mode, and the cold pit slow cooling is ensured to be more than or equal to 500 ℃ and the hot rolling hardness after slow cooling is ensured to be less than or equal to 250HB.
In the rolling process, the temperature of the slow cooling pit is 540-700 ℃.
The mechanical properties of the steel for the bulldozer thrust wheel after heat treatment provided by the technical scheme meet the following conditions: the normal temperature impact energy is more than 80J, the Brinell hardness is more than 219HB, the tensile strength is more than 1127MPa, and the yield strength is more than 990MPa, so that the steel has excellent comprehensive mechanical properties, and the hardness after heat treatment is higher, so that the abrasion of the steel for the bulldozer thrust wheel can be reduced, and the service life of the steel is prolonged. In the production method of the steel for the bulldozer thrust wheels, the steel for the bulldozer thrust wheels with excellent comprehensive mechanical properties can be obtained by controlling reasonable rolling process conditions, and the abrasion of the steel for the bulldozer thrust wheels is reduced, so that the service life of the steel for the bulldozer thrust wheels is prolonged.
Detailed Description
The invention aims to provide steel with excellent comprehensive performance and abrasion resistance for a bulldozer thrust wheel and a production method thereof, in particular to a steel with excellent comprehensive performance and abrasion resistance for a bulldozer thrust wheel, which comprises the following steps:
the steel for the bulldozer thrust wheel comprises the following chemical components in percentage by mass: 0.39 to 0.43 percent of C, 0.23 to 0.35 percent of Si, 1.68 to 1.78 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.020 percent of S, 0.015 to 0.030 percent of Al, 0.12 to 0.17 percent of Cr, less than or equal to 0.10 percent of Mo, less than or equal to 0.15 percent of Cu, less than or equal to 0.20 percent of Ni, less than or equal to 0.0005 percent of B, less than or equal to 2.0ppm of [ H ] [ O ] < 20ppm, [ N ] < 80ppm, and the balance of Fe and unavoidable impurities. The mechanical properties of the steel for the bulldozer thrust wheel after heat treatment meet the following conditions: the normal temperature impact energy is more than 80J, the Brinell hardness is more than 219HB, the tensile strength is more than 1127MPa, and the yield strength is more than 990 MPa.
The production method of the steel for the bulldozer thrust wheel comprises the following steps: continuous casting, heating and rolling; wherein:
the steel sample for continuous casting comprises the following chemical components in percentage by mass: 0.39 to 0.43 percent of C, 0.23 to 0.35 percent of Si, 1.68 to 1.78 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.020 percent of S, 0.015 to 0.030 percent of Al, 0.12 to 0.17 percent of Cr, less than or equal to 0.10 percent of Mo, less than or equal to 0.15 percent of Cu, less than or equal to 0.20 percent of Ni, less than or equal to 0.0005 percent of B, less than or equal to 2.0ppm of [ H ] < 20ppm of [ O ] < 80ppm of [ N ], and the balance of Fe and unavoidable impurities;
the heating system is as follows: the preheating section is 760-850 ℃, and the preheating time is more than or equal to 45min; heating the section I to 1060-1140 ℃ and the section II to 1130-1220 ℃ for more than or equal to 90min; the soaking time is more than or equal to 45min at 1130-1180 ℃ in the soaking section;
the rolling process comprises the following steps: the heated continuous casting billet adopts a rolling process of a phi 850 cogging machine and a phi 700mm multiplied by 3 plus phi 550mm multiplied by 4 continuous rolling mill, wherein the initial rolling temperature of the phi 850 cogging machine is controlled to 1050-1140 ℃, the initial rolling temperature of the phi 700mm multiplied by 3 plus phi 550mm multiplied by 4 continuous rolling mill is controlled to 1020-1050 ℃, the final rolling temperature is controlled to 870-910 ℃, a cooling bed adopts a close-packed mode, and the hot rolling hardness after slow cooling is ensured to be less than or equal to 250HB by feeding the cooling bed into a slow cooling pit at more than or equal to 500 ℃ which is optionally 540-610 ℃.
The present invention will be described in more detail with reference to examples. These examples are merely illustrative of the best modes of carrying out the invention and are not intended to limit the scope of the invention in any way.
Example 1
The process for producing the steel for the bulldozer thrust wheel comprises the following steps of: smelting, continuous casting, heating and rolling, which comprises the following steps:
(1) Smelting: the method specifically comprises the following process steps: blast furnace molten iron-molten iron pretreatment-converter top-bottom combined blowing smelting-LF external refining-RH vacuum treatment; wherein the alloying adjustment component is carried out in the tapping process of the converter; performing LF refining to finely adjust alloy elements; vacuum degree of VD vacuum degassing treatment is 25Pa, degassing time is 13min, and pure aluminum wire is fed after the VD vacuum degassing treatment;
(2) Continuous casting process: the steel sample for continuous casting comprises the following chemical components in percentage by mass: 0.39 to 0.43 percent of C, 0.23 to 0.35 percent of Si, 1.68 to 1.78 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.020 percent of S, 0.015 to 0.030 percent of Al, 0.12 to 0.17 percent of Cr, less than or equal to 0.10 percent of Mo, less than or equal to 0.15 percent of Cu, less than or equal to 0.20 percent of Ni, less than or equal to 0.0005 percent of B, less than or equal to 2.0ppm of [ H ] < 20ppm of [ O ] < 80ppm of [ N ], and the balance of Fe and unavoidable impurities; the continuous casting blank adopts a slow cooling process, and the slow cooling time is 24 hours;
(3) Heating procedure: the heating system of the continuous casting blank is as follows: the preheating section is 760-850 ℃, and the preheating time is more than or equal to 45min; heating the section I to 1060-1140 ℃ and the section II to 1130-1220 ℃ for more than or equal to 90min; the soaking time is more than or equal to 45min at 1130-1180 ℃ in the soaking section; the heating section adopts slow heating, and is prohibited from being excessively burnt or overheated, so that the internal and external temperatures of the continuous casting billet are ensured to be uniform;
(4) Hot rolling: the heated continuous casting billet adopts a rolling process of phi 850 cogging mill and a phi 700mm multiplied by 3 plus phi 550mm multiplied by 4 continuous rolling mill, and specific process parameters are shown in the following table 1. The hot rolled round steel is slowly cooled for more than 48 hours (ensuring that the temperature is more than or equal to 500 ℃ and is optionally 540-610 ℃) and is slowly cooled in a slow cooling pit, the surface of the hot rolled round steel is free from defects such as surface cracks, the requirements of production technical protocols are completely met, and the hot rolling hardness is less than or equal to 250HB, so that sawing processing is facilitated.
(5) And (3) performance test: the test pieces with the longitudinal phi of 25mm are taken according to GB/T2975, the heat treatment system is 880+/-5 ℃ oil quenching and 560+/-5 ℃ tempering water quenching, the mechanical properties are tested as shown in the following table 2, the impact properties are tested as shown in the following table 3, and the Brinell hardness results are tested as shown in the following table 4. Taking a phi 30mm sample according to GB/T225, and treating the sample by the following heat treatment system: the normalizing temperature is 900+ -10 ℃, the end quenching temperature is 890+ -5 ℃, and the end hardenability performance is tested, and the results are shown in the following table 5.
Examples 2 to 3
Examples 2-3 bulldozer thrust wheel steels were produced following the process steps of example 1, except that: the rolling process of the continuous casting billets is different, and specific rolling process conditions are shown in the following table 1. The mechanical properties, impact properties, and brinell hardness test results of the steels for bulldozer wheels obtained in examples 2 to 3 are shown in tables 2, 3 and 4, respectively, and the end hardenability properties of the steels for bulldozer wheels obtained in examples 2 to 3 are shown in table 5, respectively.
Comparative examples 1 to 4
Comparative examples 1-4 bulldozer thrust wheel steels were produced following the process steps of example 1, except that: the rolling process of the continuous casting billets is different, and specific rolling process conditions are shown in the following table 1. The impact properties and Brinell hardness test results of the steels for bulldozer thrust wheels obtained in comparative examples 1 to 4 are shown in tables 3 and 4, respectively.
Table 1: rolling process of examples 1-3 and comparative examples 1-4
Table 2: mechanical Properties of the steels for bulldozer thrust wheels obtained by the production of examples 1 to 3 and comparative examples 1 to 4
Table 3: impact Property of steels for bulldozer thrust wheels obtained by production of examples 1 to 3 and comparative examples 1 to 4
Table 4: brinell hardness of steel for bulldozer wheels produced in examples 1 to 3 and comparative examples 1 to 4
Table 5: examples 1 to 3 end hardenability of the bulldozer thrust wheel steels obtained
From the test results shown in tables 3 and 4, it is apparent that the rolling process for producing the steel for bulldozer wheels has a significant effect on both the impact properties and the Brinell hardness after heat treatment of the steel for bulldozer wheels. The steels for bulldozer wheels obtained by the rolling processes of examples 1 to 3 all had good impact properties after heat treatment (normal temperature impact energy is 80J or more) and higher Brinell hardness (219 HB or more) compared to the rolling processes of comparative examples 1 to 4, which are advantageous in reducing wear of the wheels and at the same time improving their impact resistance. From the results shown in tables 2 and 5, it is also apparent that the steel for bulldozer thrust wheels produced by the present invention has excellent mechanical properties (tensile strength of 1127MPa or more and yield strength of 990MPa or more), and the end hardenability after heat treatment is within the range required by the technical protocol, and thus has excellent comprehensive mechanical properties.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. The steel for the bulldozer thrust wheels is characterized by comprising the following chemical components in percentage by mass: 0.39 to 0.43 percent of C, 0.23 to 0.35 percent of Si, 1.68 to 1.78 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.020 percent of S, 0.015 to 0.030 percent of Al, 0.12 to 0.17 percent of Cr, less than or equal to 0.10 percent of Mo, less than or equal to 0.15 percent of Cu, less than or equal to 0.20 percent of Ni, less than or equal to 0.0005 percent of B, less than or equal to 2.0ppm of [ H ] < 20ppm of [ O ] < 80ppm of [ N ], and the balance of Fe and unavoidable impurities;
the mechanical properties of the steel for the bulldozer thrust wheel after heat treatment meet the following conditions: the normal temperature impact energy is more than 80J, the Brinell hardness is more than 219 and HB, the tensile strength is more than 1127MPa, and the yield strength is more than 990 MPa;
the production method of the steel for the bulldozer thrust wheel comprises the following steps: continuous casting, heating and rolling; wherein:
the steel sample for continuous casting comprises the following chemical components in percentage by mass: 0.39 to 0.43 percent of C, 0.23 to 0.35 percent of Si, 1.68 to 1.78 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.020 percent of S, 0.015 to 0.030 percent of Al, 0.12 to 0.17 percent of Cr, less than or equal to 0.10 percent of Mo, less than or equal to 0.15 percent of Cu, less than or equal to 0.20 percent of Ni, less than or equal to 0.0005 percent of B, less than or equal to 2.0ppm of [ H ] < 20ppm of [ O ] < 80ppm of [ N ], and the balance of Fe and unavoidable impurities;
the heating system is as follows: the preheating section is 760-850 ℃, and the preheating time is more than or equal to 45min; heating the section I to 1060-1140 ℃ and the section II to 1130-1220 ℃ for more than or equal to 90min; the soaking time is more than or equal to 45min at 1130-1180 ℃ in the soaking section;
the rolling process comprises the following steps: the heated continuous casting billet adopts a rolling process of a phi 850 cogging machine and a phi 700mm multiplied by 3 plus phi 550mm multiplied by 4 continuous rolling mill, wherein the initial rolling temperature of the phi 850 cogging machine is controlled to 1050-1140 ℃, the initial rolling temperature of the phi 700mm multiplied by 3 plus phi 550mm multiplied by 4 continuous rolling mill is controlled to 1020-1050 ℃, the final rolling temperature is controlled to 870-910 ℃, a cooling bed adopts a close-packed mode, and the cold pit slow cooling is ensured to be more than or equal to 500 ℃ and the hot rolling hardness after slow cooling is ensured to be less than or equal to 250HB.
2. The steel for a bulldozer thrust wheel according to claim 1, wherein said heat treatment conditions are: oil quenching at 880+/-5 ℃ and tempering water quenching at 560+/-5 ℃.
3. The steel for a bulldozer thrust wheel according to claim 1, wherein in said rolling process, the temperature of the slow cooling in the pit is 540 to 700 ℃.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09202937A (en) * | 1996-01-23 | 1997-08-05 | Sumitomo Metal Ind Ltd | Wheel for rolling stock excellent in wear resistance and thermal crack resistance and its production |
| JP2004232669A (en) * | 2003-01-28 | 2004-08-19 | Nsk Ltd | Roller bearing unit for wheel support |
| CN101307414A (en) * | 2008-06-25 | 2008-11-19 | 莱芜钢铁股份有限公司 | Steel for high performance manganese-containing engineering machinery wheel and method for preparing same |
| JP2010280978A (en) * | 2009-06-08 | 2010-12-16 | Sumitomo Metal Ind Ltd | Non-heat-treated bar steel for direct cutting |
| CN108411192A (en) * | 2018-03-05 | 2018-08-17 | 山东钢铁股份有限公司 | A kind of high-hardenability engineering machinery thrust wheel steel and preparation method |
| CN108998725A (en) * | 2018-07-17 | 2018-12-14 | 石家庄钢铁有限责任公司 | Track link rail 35MnBM steel and preparation method thereof |
| CN110512140A (en) * | 2019-08-26 | 2019-11-29 | 山东钢铁股份有限公司 | A kind of engineering machinery wheel steel and preparation method thereof |
| CN112342460A (en) * | 2020-09-03 | 2021-02-09 | 包头钢铁（集团）有限责任公司 | Steel for B2 high-end steel ball of ball mill and rolling method thereof |
-
2022
- 2022-05-25 CN CN202210580319.0A patent/CN114959473B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09202937A (en) * | 1996-01-23 | 1997-08-05 | Sumitomo Metal Ind Ltd | Wheel for rolling stock excellent in wear resistance and thermal crack resistance and its production |
| JP2004232669A (en) * | 2003-01-28 | 2004-08-19 | Nsk Ltd | Roller bearing unit for wheel support |
| CN101307414A (en) * | 2008-06-25 | 2008-11-19 | 莱芜钢铁股份有限公司 | Steel for high performance manganese-containing engineering machinery wheel and method for preparing same |
| JP2010280978A (en) * | 2009-06-08 | 2010-12-16 | Sumitomo Metal Ind Ltd | Non-heat-treated bar steel for direct cutting |
| CN108411192A (en) * | 2018-03-05 | 2018-08-17 | 山东钢铁股份有限公司 | A kind of high-hardenability engineering machinery thrust wheel steel and preparation method |
| CN108998725A (en) * | 2018-07-17 | 2018-12-14 | 石家庄钢铁有限责任公司 | Track link rail 35MnBM steel and preparation method thereof |
| CN110512140A (en) * | 2019-08-26 | 2019-11-29 | 山东钢铁股份有限公司 | A kind of engineering machinery wheel steel and preparation method thereof |
| CN112342460A (en) * | 2020-09-03 | 2021-02-09 | 包头钢铁（集团）有限责任公司 | Steel for B2 high-end steel ball of ball mill and rolling method thereof |
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