CN117488193A - HB300 grade quenching and tempering-free wear-resistant steel plate and production method thereof - Google Patents
HB300 grade quenching and tempering-free wear-resistant steel plate and production method thereof Download PDFInfo
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- CN117488193A CN117488193A CN202311513011.5A CN202311513011A CN117488193A CN 117488193 A CN117488193 A CN 117488193A CN 202311513011 A CN202311513011 A CN 202311513011A CN 117488193 A CN117488193 A CN 117488193A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 70
- 239000010959 steel Substances 0.000 title claims abstract description 70
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 238000010791 quenching Methods 0.000 title claims abstract description 22
- 230000000171 quenching effect Effects 0.000 title claims abstract description 21
- 238000005096 rolling process Methods 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 239000000126 substance Substances 0.000 claims abstract description 8
- 238000005452 bending Methods 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 229910052742 iron Inorganic materials 0.000 claims abstract description 5
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 4
- 229910001563 bainite Inorganic materials 0.000 claims description 4
- 229910000734 martensite Inorganic materials 0.000 claims description 4
- 230000003811 curling process Effects 0.000 claims description 3
- 238000012797 qualification Methods 0.000 claims description 3
- 229910001568 polygonal ferrite Inorganic materials 0.000 claims description 2
- 238000010079 rubber tapping Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract description 8
- RMLPZKRPSQVRAB-UHFFFAOYSA-N tris(3-methylphenyl) phosphate Chemical compound CC1=CC=CC(OP(=O)(OC=2C=C(C)C=CC=2)OC=2C=C(C)C=CC=2)=C1 RMLPZKRPSQVRAB-UHFFFAOYSA-N 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract 1
- 238000005299 abrasion Methods 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 229910000617 Mangalloy Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing 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
- C22C38/06—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
- C22C38/22—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
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/002—Bainite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
Abstract
An HB300 grade quenching and tempering-free wear-resistant steel plate and a production method thereof belong to the technical field of steel material preparation. The steel plate comprises the following chemical components in percentage by mass: 0.10 to 0.30 percent, si:0.25 to 0.55 percent, mn: 1.00-1.50%, P is less than or equal to 0.020%, S is less than or equal to 0.010%, cr:0.20 to 0.50 percent, mo:0.10 to 0.30 percent of Ti: 0.40-0.70%, als <0.10%, and Fe and unavoidable impurities in balance. The production method comprises the steps of heating, rough rolling, finish rolling and cooling; and (3) cooling the rolled steel plate to 670-690 ℃, then placing the steel plate into a heating furnace isothermal with the curling temperature, and cooling the steel plate to room temperature along with the furnace. The invention adopts a full-flow on-line mode of TMCP, on-line cooling and direct coiling, has short process flow, and the obtained steel plate has increased toughness and excellent bending performance on the basis of meeting the wear resistance.
Description
Technical Field
The invention belongs to the technical field of wear-resistant steel, and relates to a HB300 grade quenching and tempering-free wear-resistant steel plate and a production method thereof.
Background
Currently, there are three main categories of wear-resistant steel materials widely used in industry: austenitic manganese steel, high chromium cast steel, and low alloy wear resistant steel. The low alloy wear-resistant steel has the characteristics of high strength, high hardness, high wear resistance and the like, has certain processing and forming properties, and is most widely applied. In terms of production process, the traditional low-alloy wear-resistant steel adopts an off-line heat treatment (quenching and tempering) process after rolling to obtain a lath martensite matrix structure so as to ensure the strength and hardness of the material. However, the process has the advantages of long production flow, high cost, low production efficiency, and high brittleness of martensite itself, so that the formability of the steel plate is poor.
In order to shorten the process flow, a few manufacturers and scientific research institutes develop tempering-free wear-resistant steel research recently. Application publication number CN 113930669A discloses HB 450-grade wear-resistant steel for a self-discharging carriage body and a production method thereof, and application publication number CN 113637894A discloses HB 450-grade wear-resistant steel free of leveling and tempering and a production method thereof. The two methods adopt the production process of rolling, quenching on line and rapidly cooling, and finally cooling to 100-200 ℃ and then curling. However, in the actual production process, the curling temperature range is easy to cause plate type mismatch, and the comprehensive qualification rate of the materials is affected.
Therefore, how to obtain wear-resistant steel with good surface quality and high production efficiency on the premise of short flow is a problem to be solved at present.
Disclosure of Invention
In order to solve the technical problems, the invention provides an HB300 grade quenching and tempering-free wear-resistant steel plate and a production method thereof. The technical scheme adopted by the invention is as follows:
the HB300 grade quenching and tempering-free wear-resistant steel plate comprises the following chemical components in percentage by mass: c:0.10 to 0.30 percent, si:0.25 to 0.55 percent, mn: 1.00-1.50%, P is less than or equal to 0.020%, S is less than or equal to 0.010%, cr:0.20 to 0.50 percent, mo:0.10 to 0.30 percent of Ti: 0.40-0.70%, als <0.10%, and Fe and unavoidable impurities in balance.
Further, the HB300 grade quenching and tempering-free wear-resistant steel plate comprises the following chemical components in percentage by mass: c:0.17 to 0.21 percent, si:0.35 to 0.45 percent, mn:1.15 to 1.25 percent, P is less than or equal to 0.010 percent, S is less than or equal to 0.005 percent, cr:0.25 to 0.35 percent, mo:0.15 to 0.25 percent, ti:0.50 to 0.60 percent, als is less than or equal to 0.035 percent, and the balance is Fe and unavoidable impurities.
Further, the thickness of the steel plate is 2-8 mmmm, and the microstructure at room temperature is bainite, martensite and a small amount of polygonal ferrite, wherein the area ratio of the bainite is more than or equal to 80%.
Further, the surface hardness of the steel plate is more than or equal to 270HB, the yield strength is more than or equal to 600MPa, the tensile strength is more than or equal to 900MPa, the elongation is more than or equal to 8%, and the 180-degree cold bending is qualified (the bending core diameter d=3a).
The production method of the HB300 grade quenching and tempering-free wear-resistant steel plate comprises the steps of heating, rough rolling, finish rolling and cooling;
the heating step is carried out at 1230-1260 ℃ for 2-2.5 h, and the surface iron scale is removed after discharging.
And the rough rolling step is carried out at the initial rolling temperature of 1150-1200 ℃ for 6 times of rolling.
And the finish rolling step, wherein the initial rolling temperature is 1000-1100 ℃, the finish rolling temperature is 860-880 ℃ after 5-pass rolling.
And in the cooling step, the rolled steel plate is immediately put into a heating furnace with the same heating temperature after being cooled to 670-690 ℃ to simulate a curling process, and then is cooled to room temperature along with the furnace.
The HB300 grade quenching and tempering free wear-resistant steel plate can be produced by controlling the finishing temperature and the coiling temperature in a given range.
The theoretical analysis of the component design and the proportion of the invention is as follows:
c is the most direct element for improving the strength of the material, the carbon content is increased, the strength and the hardness of the material are improved, but the toughness and the welding performance of the steel plate are also reduced, and the mass percent of C is 0.10-0.30%, preferably 0.17-0.21% in comprehensive consideration;
si is a ferrite forming element and can be dissolved in ferrite in a solid manner, so that the strength of the ferrite is ensured to be higher. However, too high Si is liable to cause quench cracking and also deteriorates the surface quality, resulting in formation of a large amount of red rust on the surface of the steel sheet. Comprehensively considering that the weight percentage of Si is 0.25-0.55%, preferably 0.35-0.45%;
mn is a good deoxidizer and desulfurizing agent, and can eliminate or reduce hot shortness of steel caused by sulfur, and improve hot workability of steel. The manganese content is increased, so that the toughness, strength, hardness and wear resistance of the steel can be improved, but the corrosion resistance and welding performance are reduced. Comprehensively considering that the Mn content is 1.00-1.50 percent by weight, preferably 1.15-1.25 percent by weight;
cr can increase the hardenability of steel and has secondary hardening effect, so that the hardness and wear resistance of high-carbon steel are improved without embrittling the steel; when the chromium content exceeds 15%, the strength and hardness are lowered, and the elongation and reduction of area are correspondingly improved. Comprehensively considering that the mass percentage of Cr is 0.20-0.50%, preferably 0.25-0.35%;
mo is a medium-strength carbide forming element, can refine the crystal grains of steel, improves hardenability and heat strength performance, and maintains enough strength and creep resistance at high temperature. At the same time, the temperatures of A3 and A1 are raised, and the GS line moves to the upper left. Comprehensively considering that the mass percentage of Mo is 0.10 to 0.30 percent, preferably 0.15 to 0.25 percent;
ti is generally added into steel as a microalloy element, and is dissolved in a matrix to play a role in refining grains. The amount of Ti added in the present invention is relatively high, and is 0.40 to 0.70%, preferably 0.50 to 0.60%. The precipitation of TiC is mainly used as hard second phase particles, so that the cutting behavior in the abrasion process is resisted, and the abrasion resistance of the material is enhanced.
Compared with the prior art, the invention has the beneficial effects that:
(1) In terms of material performance, the HB300 grade quenching and tempering-free wear-resistant steel plate has the surface hardness of more than or equal to 270HB, the yield strength of more than or equal to 550MPa, the tensile strength of more than or equal to 950MPa, the elongation rate of more than or equal to 12 percent, the maximum elongation rate of 20 percent, and the 180-degree cold bending qualification (the bending center diameter d=3a), and compared with the conventional wear-resistant steel, the toughness is greatly increased on the basis of meeting the wear-resistant performance, and particularly has excellent bending performance;
(2) In terms of surface quality, the HB300 grade quenching and tempering-free wear-resistant steel plate has good surface quality and no obvious red rust phenomenon;
(3) In terms of production process, the HB300 grade quenching and tempering-free wear-resistant steel plate adopts a full-flow online production mode of TMCP, online cooling and direct coiling, and has the advantages of short process flow, low energy consumption, energy conservation and environmental protection.
Drawings
FIG. 1 is a microstructure of a HB300 grade temper-free wear resistant steel plate of the invention;
FIG. 2 is a surface quality diagram of the HB300 grade heat-free and tempered wear-resistant steel plate of the invention;
FIG. 3 is a surface quality chart of a non-quenched and tempered wear resistant steel plate of the same strength grade as in comparative example.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
The HB300 grade quenching and tempering-free wear-resistant steel plate comprises the following chemical components in percentage by mass: c:0.10 to 0.30%, preferably 0.17 to 0.21%; si:0.25 to 0.55%, preferably 0.35 to 0.45%; mn:1.00 to 1.50%, preferably 1.15 to 1.25%; p is less than or equal to 0.020%, preferably P is less than or equal to 0.010%; s is less than or equal to 0.010 percent, preferably S is less than or equal to 0.005 percent; cr:0.20 to 0.50%, preferably 0.25 to 0.35%; mo:0.10 to 0.30%, preferably 0.15 to 0.25%; ti:0.40 to 0.70%, preferably 0.50 to 0.60%; als <0.10%, preferably Als < 0.035%, the balance being Fe and unavoidable impurities.
The production method of the HB300 grade quenching and tempering-free wear-resistant steel plate comprises the following specific steps:
(1) Smelting: in the smelting process, the alloy components and smelting temperature in each stage are precisely controlled, the contents of P, S, N, O and H elements are strictly controlled, and the whole-process protection casting is adopted, so that billets with the sizes of 150mm multiplied by 150mm are formed.
(2) Rolling: sequentially comprising the steps of heating, rough rolling, finish rolling and cooling;
heating, namely heating at 1230-1260 ℃ for 2-2.5 hours, and removing surface iron scales after discharging;
a rough rolling step, wherein the initial rolling temperature is 1150-1200 ℃ and 6 times of rolling are carried out;
a finish rolling step, wherein the initial rolling temperature is 1000-1100 ℃, 5 times of rolling are carried out, and the final rolling temperature is 860-880 ℃;
and a cooling step, namely immediately placing the rolled steel plate into a heating furnace with the same heating temperature after water cooling to 670-690 ℃ to simulate a curling process, stopping heating the steel plate in the heating furnace, and then cooling the steel plate to room temperature along with the furnace.
The chemical compositions and weight percentages of the HB300 grade quenching and tempering-free wear-resistant steel plates of each example are shown in Table 1, the production procedure control parameters are shown in Table 2, and the mechanical properties of the steel plates are shown in Table 3.
Table 1, chemical composition (wt%) of abrasion resistant steel sheets of examples and comparative examples
In table 1, the balance is Fe and unavoidable impurities.
Table 2, working procedure control parameters for each of the examples and comparative examples of abrasion resistant steel sheet
Table 3 mechanical properties of the abrasion-resistant steel sheets of each example and comparative example
The abrasion test is carried out on the abrasion steel of the embodiment by adopting an MLG-130 dry sand rubber wheel type abrasion tester as a wet sand semi-free abrasive abrasion tester, the abrasion time is 1h, the frequency is 200 times per minute, the sand granularity is 50-70 meshes, the applied load is 60N, and the result is not much different from the comparative example.
As can be seen from Table 3, the HB300 grade quenching and tempering-free wear-resistant steel has the advantages of meeting the requirements of the conventional wear-resistant steel standard (GB T24186-2022) on yield strength, tensile strength, elongation and surface hardness, particularly having good cold bending performance, along with short process flow, good plate shape and surface quality, and greatly improving the production efficiency. As can be seen from the comparison of figures 2 and 3, the HB300 grade heat-resistant and wear-resistant steel plate has good surface quality and no obvious red rust phenomenon.
Claims (8)
1. The HB300 grade quenching and tempering-free wear-resistant steel plate is characterized by comprising the following chemical components in percentage by mass: c:0.10 to 0.30 percent, si:0.25 to 0.55 percent, mn: 1.00-1.50%, P is less than or equal to 0.020%, S is less than or equal to 0.010%, cr:0.20 to 0.50 percent, mo:0.10 to 0.30 percent of Ti: 0.40-0.70%, als <0.10%, and Fe and unavoidable impurities in balance.
2. The HB300 grade quenching and tempering-free wear-resistant steel plate according to claim 1, wherein the steel plate comprises the following chemical components in percentage by mass: c:0.17 to 0.21 percent, si:0.35 to 0.45 percent, mn:1.15 to 1.25 percent, P is less than or equal to 0.010 percent, S is less than or equal to 0.005 percent, cr:0.25 to 0.35 percent, mo:0.15 to 0.25 percent, ti:0.50 to 0.60 percent, als is less than or equal to 0.035 percent, and the balance is Fe and unavoidable impurities.
3. The HB300 grade non-quenched and tempered wear resistant steel plate according to claim 1 or 2, wherein the steel plate has a thickness of 2-8 mm, and a microstructure at room temperature is bainite, martensite and a small amount of polygonal ferrite, wherein the area ratio of bainite is not less than 80%.
4. The HB300 grade quenching and tempering-free wear-resistant steel plate according to claim 1 or 2, wherein the steel plate has a surface hardness of not less than 270HB, a yield strength of not less than 550MPa, a tensile strength of not less than 950MPa, an elongation of not less than 12% and a 180 DEG cold bending qualification.
5. The method for producing a HB300 grade heat-free and tempered wear resistant steel plate according to any one of claims 1 to 4, comprising the steps of heating, rough rolling, finish rolling and cooling;
and in the cooling step, the rolled steel plate is immediately put into a heating furnace with the same heating temperature after being cooled to 670-690 ℃ to simulate a curling process, and then is cooled to room temperature along with the furnace.
6. The method for producing HB300 grade heat-resistant steel sheet of claim 5 wherein the heating step is carried out at 1230-1260 ℃ for 2-2.5 h, and the surface scale is removed after tapping.
7. The method for producing a HB300 grade heat-resistant and wear-resistant steel sheet according to claim 6, wherein the rough rolling step is performed at a starting rolling temperature of 1150-1200 ℃ by 6-pass rolling.
8. The method for producing a quality-free and heat-resistant steel sheet according to any one of claims 5 to 7, wherein the finish rolling step is carried out at a start rolling temperature of 1000 to 1100 ℃ and a finish rolling temperature of 860 to 880 ℃ after 5 passes of rolling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311513011.5A CN117488193A (en) | 2023-11-14 | 2023-11-14 | HB300 grade quenching and tempering-free wear-resistant steel plate and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311513011.5A CN117488193A (en) | 2023-11-14 | 2023-11-14 | HB300 grade quenching and tempering-free wear-resistant steel plate and production method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN117488193A true CN117488193A (en) | 2024-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311513011.5A Pending CN117488193A (en) | 2023-11-14 | 2023-11-14 | HB300 grade quenching and tempering-free wear-resistant steel plate and production method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN117488193A (en) |
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- 2023-11-14 CN CN202311513011.5A patent/CN117488193A/en active Pending
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