CN114959473A - Steel for thrust wheel of bulldozer and production method thereof - Google Patents

Steel for thrust wheel of bulldozer and production method thereof Download PDF

Info

Publication number
CN114959473A
CN114959473A CN202210580319.0A CN202210580319A CN114959473A CN 114959473 A CN114959473 A CN 114959473A CN 202210580319 A CN202210580319 A CN 202210580319A CN 114959473 A CN114959473 A CN 114959473A
Authority
CN
China
Prior art keywords
equal
less
percent
steel
bulldozer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202210580319.0A
Other languages
Chinese (zh)
Other versions
CN114959473B (en
Inventor
周彦
高海冬
孙雪丽
丁宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baotou Iron and Steel Group Co Ltd
Original Assignee
Baotou Iron and Steel Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Baotou Iron and Steel Group Co Ltd filed Critical Baotou Iron and Steel Group Co Ltd
Priority to CN202210580319.0A priority Critical patent/CN114959473B/en
Publication of CN114959473A publication Critical patent/CN114959473A/en
Application granted granted Critical
Publication of CN114959473B publication Critical patent/CN114959473B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C21D1/28—Normalising
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • 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
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • 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
    • 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
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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 ], lessthan or equal to 20ppm of [ O ], lessthan or equal to 80ppm of [ N ], and the balance of Fe and inevitable impurities.

Description

Steel for bulldozer thrust wheel and production method thereof
Technical Field
The invention belongs to the technical field of steel rolling, and particularly relates to steel for a thrust wheel of a bulldozer and a production method thereof.
Background
The crawler dozer traveling mechanism (track roller) bears the entire weight of the dozer and is responsible for the traveling function of the dozer. The main form of damage is wear, for example due to contact with the track surface of the track section, which is characterized by: a reduction in outer flange diameter; reduction of the diameter of the raceway surface; the diameter of the double-sided inner flange is reduced; a reduction in the width of the bilateral inner flange; a reduction in the width of the outer flange.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the steel for the thrust wheel of the bulldozer, 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 ], lessthan or equal to 20ppm of [ O ], lessthan or equal to 80ppm of [ N ], and the balance of Fe and inevitable impurities.
The mechanical property of the steel for the bulldozer thrust wheel after heat treatment meets the following requirements: the impact energy at normal temperature 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 thrust wheel of the bulldozer, 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: 0.39-0.43% of C, 0.23-0.35% of Si, 1.68-1.78% of Mn1, 0.020% or less of P, 0.020% or less of S, 0.015-0.030% of Al, 0.12-0.17% of Cr, 0.10% or less of Mo, 0.15% or less of Cu, 0.20% or less of Ni, 0.0005% or less of B, 2.0ppm or less of [ H ], 20ppm or less of [ O ], [ 80ppm or less of [ N ], and the balance of Fe and inevitable impurities;
the heating system comprises the following steps: the preheating section is 760-850 ℃, and the preheating time is more than or equal to 45 min; heating the first stage to 1060-1140 ℃, heating the second stage to 1130-1220 ℃, wherein the heating time is more than or equal to 90 min; the soaking section is 1130-1180 ℃, and the soaking time is more than or equal to 45 min;
the rolling process comprises the following steps: the heated continuous casting blank adopts a phi 850 cogging mill and a phi 700mm multiplied by 3+ phi 550mm multiplied by 4 continuous rolling mill rolling process, wherein the cogging temperature of the phi 850 cogging mill is controlled to be 1050-1140 ℃, the cogging temperature of the phi 700mm multiplied by 3+ phi 550mm multiplied by 4 continuous rolling mill is controlled to be 1020-1050 ℃, the finish rolling temperature is controlled to be 870-910 ℃, a cold bed adopts a close packing mode, the condition that the continuous casting blank enters a slow cooling pit for slow cooling at the temperature of more than or equal to 500 ℃ is ensured, and the hot rolling hardness after slow cooling is ensured to be less than or equal to 250 HB.
In the rolling process, the temperature of entering a slow cooling pit for slow cooling is 540-700 ℃.
The mechanical property of the steel for the bulldozer thrust wheel after heat treatment provided based on the technical scheme meets the following requirements: 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 property, 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 can be prolonged. In the production method of the steel for the bulldozer thrust wheel, the steel for the bulldozer thrust wheel with excellent comprehensive mechanical properties can be obtained by controlling reasonable rolling process conditions, so that the abrasion of the steel for the bulldozer thrust wheel is reduced, and the service life of the steel is prolonged.
Detailed Description
The invention aims to provide a wear-resistant steel for a bulldozer thrust wheel with excellent comprehensive performance and a production method thereof, and specifically comprises the following steps:
the steel for the thrust wheel of the bulldozer 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 ], lessthan or equal to 20ppm of [ O ], lessthan or equal to 80ppm of [ N ], and the balance of Fe and inevitable impurities. The mechanical property of the steel for the thrust wheel of the bulldozer after heat treatment meets the following requirements: the impact energy at normal temperature 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 thrust wheel of the bulldozer 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: 0.39-0.43% of C, 0.23-0.35% of Si, 1.68-1.78% of Mn1, 0.020% or less of P, 0.020% or less of S, 0.015-0.030% of Al, 0.12-0.17% of Cr, 0.10% or less of Mo, 0.15% or less of Cu, 0.20% or less of Ni, 0.0005% or less of B, 2.0ppm or less of [ H ], 20ppm or less of [ O ], [ 80ppm or less of [ N ], and the balance of Fe and inevitable impurities;
the heating system comprises the following steps: the preheating section is 760-850 ℃, and the preheating time is more than or equal to 45 min; heating the first stage to 1060-1140 ℃, heating the second stage to 1130-1220 ℃, wherein the heating time is more than or equal to 90 min; the soaking section is 1130-1180 ℃, and the soaking time is more than or equal to 45 min;
the rolling process comprises the following steps: the heated continuous casting blank adopts a phi 850 cogging mill and a phi 700mm multiplied by 3+ phi 550mm multiplied by 4 continuous rolling mill rolling process, wherein the cogging temperature of the phi 850 cogging mill is controlled to be 1050-1140 ℃, the cogging temperature of the phi 700mm multiplied by 3+ phi 550mm multiplied by 4 continuous rolling mill is controlled to be 1020-1050 ℃, the finish rolling temperature is controlled to be 870-910 ℃, a cooling bed adopts a close packing mode, the continuous casting blank is ensured to enter a slow cooling pit for slow cooling at the temperature of more than or equal to 500 ℃ (optionally 540-610 ℃), and the hot rolling hardness after slow cooling is ensured to be less than or equal to 250 HB.
The present invention is described in more detail below with reference to examples. These examples are merely illustrative of the best mode of carrying out the invention and do not limit the scope of the invention in any way.
Example 1
The process for producing the steel for the thrust wheel of the bulldozer comprises the following specific steps: smelting, continuous casting, heating and rolling, which specifically comprises the following steps:
(1) smelting: the method specifically comprises the following process steps: blast furnace molten iron-molten iron pretreatment-converter top and bottom combined blowing smelting-LF external refining-RH vacuum treatment; alloying and adjusting components in the converter tapping process; fine adjustment of alloy elements is carried out by LF refining; VD vacuum degassing treatment with vacuum degree of 25Pa and degassing time of 13min, and feeding pure aluminum wires for treatment after VD vacuum degassing treatment;
(2) and (3) continuous casting process: the steel sample for continuous casting comprises the following chemical components in percentage by mass: 0.39-0.43% of C, 0.23-0.35% of Si, 1.68-1.78% of Mn, less than or equal to 0.020% of P, less than or equal to 0.020% of S, 0.015-0.030% of Al, 0.12-0.17% of Cr, less than or equal to 0.10% of Mo, less than or equal to 0.15% of Cu, less than or equal to 0.20% of Ni, less than or equal to 0.0005% of B, less than or equal to 2.0ppm of [ H ], lessthan or equal to 20ppm of [ O ], lessthan or equal to 80ppm of [ N ], and the balance of Fe and inevitable impurities; the continuous casting billet adopts a slow cooling process, and the slow cooling time is 24 hours;
(3) a heating procedure: the heating system of the continuous casting billet is as follows: the preheating section is 760-850 ℃, and the preheating time is more than or equal to 45 min; heating the first stage to 1060-1140 ℃, heating the second stage to 1130-1220 ℃, wherein the heating time is more than or equal to 90 min; the soaking section is 1130-1180 ℃, and the soaking time is more than or equal to 45 min; the heating section adopts slow heating, over-burning or overheating is forbidden, and the uniform temperature inside and outside the continuous casting billet is ensured;
(4) a hot rolling procedure: the heated continuous casting blank adopts a phi 850 cogging mill and a phi 700mm multiplied by 3+ phi 550mm multiplied by 4 continuous rolling mill rolling process, and the specific process parameters are shown in the following table 1. The hot-rolled round steel is slowly cooled for more than 48 hours (the hot-rolled round steel is ensured to enter a slow cooling pit for slow cooling at the temperature of more than or equal to 500 ℃ (540-610 ℃ is selected), no surface crack and other defects are found on the surface of the hot-rolled round steel, the requirements of production technical protocols are completely met, and the hot-rolling hardness is less than or equal to 250HB, so that the saw cutting processing is facilitated.
(5) And (3) performance test: taking a sample with the longitudinal phi of 25mm according to GB/T2975, carrying out oil quenching at 880 +/-5 ℃ and tempering water quenching at 560 +/-5 ℃ according to a heat treatment schedule, testing the mechanical properties of the sample as shown in the following table 2, testing the impact properties of the sample as shown in the following table 3, and testing the Brinell hardness of the sample 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 steel for bulldozer wheels was produced according to the process steps of example 1, with the exception that: the rolling process of the continuous casting billet is different, and the specific rolling process conditions are shown in the following table 1. The mechanical properties, impact properties and results of Brinell hardness tests of the steels for bulldozer wheels obtained in examples 2 to 3 are shown in tables 2, 3 and 4 below, respectively, and the end hardenability properties of the steels for bulldozer wheels obtained in examples 2 to 3 are shown in Table 5 below.
Comparative examples 1 to 4
Comparative examples 1 to 4 steel for bulldozer track wheels was produced according to the process steps of example 1, except that: the rolling process of the continuous casting billet is different, and the specific rolling process conditions are shown in the following table 1. The impact properties and the results of the Brinell hardness tests of the steels for bulldozer wheels obtained in comparative examples 1 to 4 are shown in tables 3 and 4 below, respectively.
Table 1: rolling process of examples 1 to 3 and comparative examples 1 to 4
Figure BDA0003662083920000031
Figure BDA0003662083920000041
Table 2: mechanical properties of steels for bulldozer track wheels produced in examples 1-3 and comparative examples 1-4
Figure BDA0003662083920000042
Table 3: impact Properties of steels for bulldozer track wheels produced in examples 1 to 3 and comparative examples 1 to 4
Figure BDA0003662083920000043
Table 4: brinell hardness of steels for bulldozer track wheels produced in examples 1-3 and comparative examples 1-4
Figure BDA0003662083920000044
Table 5: examples 1 to 3 the through-hardening hardness of the end of the steel for bulldozer track roller
Figure BDA0003662083920000045
From the test results shown in tables 3 and 4, it is clear that the rolling process for producing the steel for a bulldozer bogie wheel has a significant effect on both the post-heat treatment impact properties and the brinell hardness of the steel for a bulldozer bogie wheel. Compared with the rolling process of the comparative examples 1 to 4, the steel for the bulldozer thrust wheel obtained by the rolling process of the examples 1 to 3 has good impact performance after heat treatment (the normal temperature impact energy is more than 80J) and higher Brinell hardness (more than 219 HB), which is beneficial to reducing the abrasion of the thrust wheel and simultaneously improving the impact resistance of the thrust wheel. From the results shown in tables 2 and 5 above, it is also understood that the steel for a bulldozer thrust wheel produced according to the present invention has good mechanical properties (tensile strength of 1127MPa or more and yield strength of 990MPa or more), and has excellent comprehensive mechanical properties because the end hardenability after heat treatment is within the range required by the technical protocol.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. The steel for the bulldozer thrust wheel 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 ], lessthan or equal to 20ppm of [ O ], lessthan or equal to 80ppm of [ N ], and the balance of Fe and inevitable impurities.
2. The steel for a bulldozer wheel according to claim 1, characterized in that the mechanical properties of the steel for a bulldozer wheel after heat treatment satisfy: 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.
3. The steel for bulldozer track wheels according to claim 2, characterised in that said heat treatment conditions are: oil quenching at 880 +/-5 ℃ and tempering water quenching at 560 +/-5 ℃.
4. The method for producing a steel for a bulldozer thrust wheel according to any one of claims 1 to 3, characterized by comprising the steps of: continuous casting, heating and rolling; wherein:
the steel sample for continuous casting comprises the following chemical components in percentage by mass: 0.39-0.43% of C, 0.23-0.35% of Si, 1.68-1.78% of Mn, less than or equal to 0.020% of P, less than or equal to 0.020% of S, 0.015-0.030% of Al, 0.12-0.17% of Cr, less than or equal to 0.10% of Mo, less than or equal to 0.15% of Cu, less than or equal to 0.20% of Ni, less than or equal to 0.0005% of B, less than or equal to 2.0ppm of [ H ], lessthan or equal to 20ppm of [ O ], lessthan or equal to 80ppm of [ N ], and the balance of Fe and inevitable impurities;
the heating system comprises the following steps: the preheating section is 760-850 ℃, and the preheating time is more than or equal to 45 min; heating the first stage to 1060-1140 ℃, heating the second stage to 1130-1220 ℃, wherein the heating time is more than or equal to 90 min; the soaking section is 1130-1180 ℃, and the soaking time is more than or equal to 45 min;
the rolling process comprises the following steps: the heated continuous casting blank adopts a phi 850 cogging mill and a phi 700mm multiplied by 3+ phi 550mm multiplied by 4 continuous rolling mill rolling process, wherein the cogging temperature of the phi 850 cogging mill is controlled to be 1050-1140 ℃, the cogging temperature of the phi 700mm multiplied by 3+ phi 550mm multiplied by 4 continuous rolling mill is controlled to be 1020-1050 ℃, the finish rolling temperature is controlled to be 870-910 ℃, a cold bed adopts a close packing mode, the condition that the continuous casting blank enters a slow cooling pit for slow cooling at the temperature of more than or equal to 500 ℃ is ensured, and the hot rolling hardness after slow cooling is ensured to be less than or equal to 250 HB.
5. The production method according to claim 4, wherein the temperature of the annealing in the annealing pit in the rolling process is 540-700 ℃.
CN202210580319.0A 2022-05-25 2022-05-25 Steel for bulldozer thrust wheel and production method thereof Active CN114959473B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210580319.0A CN114959473B (en) 2022-05-25 2022-05-25 Steel for bulldozer thrust wheel and production method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210580319.0A CN114959473B (en) 2022-05-25 2022-05-25 Steel for bulldozer thrust wheel and production method thereof

Publications (2)

Publication Number Publication Date
CN114959473A true CN114959473A (en) 2022-08-30
CN114959473B CN114959473B (en) 2023-08-25

Family

ID=82955843

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210580319.0A Active CN114959473B (en) 2022-05-25 2022-05-25 Steel for bulldozer thrust wheel and production method thereof

Country Status (1)

Country Link
CN (1) CN114959473B (en)

Citations (8)

* Cited by examiner, † Cited by third party
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

Patent Citations (8)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
CN114959473B (en) 2023-08-25

Similar Documents

Publication Publication Date Title
US20160194729A1 (en) High-strength and highly fatigue-resistant steel rail and production method thereof
CN112981239B (en) Quenched and tempered low-carbon alloy steel and manufacturing method thereof
CN111394639B (en) Manufacturing method of high-wear-resistance gear steel
CN112981236B (en) Steel for inner raceway of constant velocity universal joint and production method thereof
CN113025867A (en) Manufacturing method of high-purity gear steel 20CrMnAl
CN110468347B (en) Bainite steel rail with high strength and toughness and manufacturing method thereof
CN110607488A (en) Online heat treatment steel rail for high-speed railway and manufacturing method thereof
CN113862576B (en) Non-quenched and tempered steel, crankshaft and production method thereof
JP2024502743A (en) Steel for Zeppa type universal joint retainer and its manufacturing method
CN113373371A (en) Super-high wear-resistance hypereutectoid pearlite steel rail material added with rare earth and nickel elements
CN110157987B (en) NQT-process-based large-thickness wear-resistant steel plate with good-40-DEG C low-temperature toughness and preparation method thereof
CN114150218A (en) Q355NE hot-rolled round steel for high-speed rail bogie and production process
CN110904385B (en) Low-cost cold-rolled steel plate for chain and production method thereof
CN111331097A (en) High-chromium alloy roll shaft for oversized double-roll crusher and manufacturing method thereof
CN109930063B (en) Steel for engineering machinery crawler chassis wheel body and production method thereof
CN116179967A (en) Material for thrust wheel axle and preparation method thereof
CN114959473B (en) Steel for bulldozer thrust wheel and production method thereof
CN112322979B (en) Steel for subway wheels and wheel production method
CN107312976B (en) Bainite steel rail and production method thereof
CN111318661A (en) High-chromium alloy roll shaft for large-size double-roll crusher and manufacturing method thereof
CN115612935B (en) High-performance sector plate of hot-rolled winding drum and manufacturing method thereof
CN111961959B (en) Medium-manganese low-carbon martensitic steel, ultra-deep well drilling rig hoisting ring and preparation method thereof
CN110144517B (en) High-strength high-toughness high-aluminum nickel-free easily-welded 40-70 mm-thick wear-resistant steel plate and preparation method thereof
CN112276030B (en) High-strength delayed fracture-resistant hot-rolled steel rail and preparation method thereof
CN114686756A (en) Novel steel for outer ring of hub unit and production process thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant