CN117363989A - Low-cost high-toughness HB 400-grade wear-resistant steel plate for mining truck bottom plate and production method thereof - Google Patents
Low-cost high-toughness HB 400-grade wear-resistant steel plate for mining truck bottom plate and production method thereof Download PDFInfo
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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
- 238000005065 mining Methods 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000005096 rolling process Methods 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 16
- 239000000126 substance Substances 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 239000012535 impurity Substances 0.000 claims abstract description 11
- 238000010791 quenching Methods 0.000 claims description 20
- 230000000171 quenching effect Effects 0.000 claims description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 12
- 238000005266 casting Methods 0.000 claims description 11
- 238000003723 Smelting Methods 0.000 claims description 10
- 238000010079 rubber tapping Methods 0.000 claims description 9
- 229910052717 sulfur Inorganic materials 0.000 claims description 9
- 238000005496 tempering Methods 0.000 claims description 9
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- 238000009749 continuous casting Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 238000009489 vacuum treatment Methods 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000006477 desulfuration reaction Methods 0.000 claims description 3
- 230000023556 desulfurization Effects 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 238000010583 slow cooling Methods 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 description 10
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 229910000734 martensite Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 229910001567 cementite Inorganic materials 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 238000013386 optimize process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
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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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- 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
- 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
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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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
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
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Abstract
The invention discloses a low-cost high-toughness HB 400-grade wear-resistant steel plate for a mining truck bottom plate, which comprises the following chemical components in percentage by weight: 0.17-0.19%, si:0.30-0.35%, mn:1.20-1.30%, P: less than or equal to 0.020 percent, S: less than or equal to 0.005 percent, ti:0.008-0.018%, B:0.0010 to 0.0020 percent, and the balance of Fe and unavoidable impurities. The main process and parameters of its production method are also disclosed. The invention obtains the low-cost high-toughness wear-resistant steel plate for the mining vehicle bottom plate with the thickness of 16-20 mm, which has high strength, high hardness and high impact toughness on the premise of low cost through reasonable low-cost component design and proper rolling and heat treatment process.
Description
Technical Field
The invention relates to the field of wear-resistant steel, in particular to a low-cost high-toughness HB 400-grade wear-resistant steel plate for a mining vehicle bottom plate and a production method thereof.
Background
The wear-resistant steel is an important steel consumption material of the mining truck bottom plate, and the low-alloy wear-resistant steel has good wear performance and toughness and is a mining truck bottom plate wear-resistant material with high cost performance. The high-strength wear-resistant steel used for the mining vehicle can effectively reduce the thickness of the material while improving the strength, toughness and wear resistance, the weight reduction of the vehicle body is obvious, the economic benefit is obvious, and the light weight development is imperative. The working condition environment of the mining vehicle is mainly abrasion and smashing of minerals, so that the hardness and toughness of the mining vehicle are extremely important indexes, and the service life of the steel plate can be remarkably prolonged by improving the toughness of the steel plate on the premise that the hardness reaches the standard. The wear-resistant steel for the mining vehicle bottom plate adopts a low-cost design, has extremely high impact toughness on the premise of ensuring the surface hardness, reduces the production cost, prolongs the service life of the mining vehicle bottom plate, reduces the consumption of social cost, and greatly contributes to green environment-friendly carbon reduction.
The invention of application publication number CN114686768A discloses 360HB-450 HB-grade wear-resistant steel and a production method thereof. The chemical components and mass percentages are as follows: c:0.10 to 0.30 percent, si:0.20 to 0.50 percent, mn:0.80 to 1.60 percent, P is less than or equal to 0.020 percent, S is less than or equal to 0.005 percent, ti:0.008 to 0.025 percent, cr:0.20 to 1.00 percent, less than or equal to 0.60 percent of Ni, 0.10 to 0.50 percent of Mo, and Al:0.025% -0.055%, B:0.0010 to 0.0030 percent, mg:0.0010 to 0.0018 percent, wherein N is less than or equal to 0.0045 percent, and the balance is Fe and unavoidable impurities; the Brinell hardness of the steel grade surface is 330-480 HBW, and a production method of the wear-resistant steel is also disclosed. The invention is different from the above invention in that the composition design is obviously different, the invention adopts low-cost composition design, the composition design does not contain noble metals such as Ni, mo, mg and the like, and the invention does not need secondary quenching. The production cost and difficulty are lower than those of the invention.
The invention discloses a low-cost high-wear-resistance wear-resistant steel with an authorized bulletin number of CN114763592B and a manufacturing method thereof, wherein the low-cost high-wear-resistance wear-resistant steel comprises the following components in percentage by weight: c is more than or equal to 0.75% and less than or equal to 2.2%, si is more than or equal to 0 and less than or equal to 0.2%, mn is more than or equal to 0 and less than or equal to 0.2%, al is more than or equal to 0.1% and less than or equal to 0.5%; the matrix of the wear-resistant steel is martensite, and cementite particles are uniformly distributed on the martensite matrix. In addition, the invention also discloses a manufacturing method of the wear-resistant steel, which comprises the following steps: (1) smelting and casting; (2) heating; (3) rolling; (4) cooling: cooling to below 400 ℃ at a cooling rate of less than or equal to 5 ℃/s, heating to enter an austenite-cementite two-phase region, and cooling to room temperature at a cooling rate of 10-100 ℃/s. The low-cost high-wear-resistance wear-resistant steel has low alloy cost and preparation cost, and can ensure good wear resistance. The invention also discloses a production method of the invention. The main difference between the invention and the invention is that the components and the process are obviously different, the components of the invention are C0.17-0.19%, si:0.30-0.35%, mn:1.20-1.30%, and the quenching process does not need secondary heating quenching.
The invention discloses wear-resistant steel with application publication number of CN114525450A and a production method thereof, wherein the wear-resistant steel comprises the following chemical components in percentage by mass: c:0.10 to 0.45 percent, si:0.20 to 0.55 percent, mn:0.50 to 1.50 percent, P is less than or equal to 0.015 percent, S is less than or equal to 0.003 percent, nb: less than or equal to 0.060 percent, V less than or equal to 0.030 percent, ti:0.008 to 0.025 percent, cr:0.20 to 1.00 percent, ni is less than or equal to 1.80 percent, mo is less than or equal to 0.50 percent, al:0.025% -0.055%, B:0.0010 to 0.0030 percent, mg:0.0010 to 0.0018 percent, N is less than or equal to 0.0045 percent, and the balance is Fe and unavoidable impurities. On the premise of ensuring the high-strength martensitic structure of the wear-resistant steel plate, the quantity and the size of the carbonitrides are reduced by the quantitative treatment of microalloying elements, the cooling speed and the austenite temperature of a casting blank are regulated and controlled, and the optimized process of secondary quenching is adopted, so that the structure grains are refined, the structure stress is eliminated, and the problem that the wear-resistant steel delays the occurrence of cracks in the cutting and polishing processes of the casting blank and the steel plate is solved. The invention is different from the above invention in that the composition design is obviously different, the invention adopts low-cost composition design, the composition design does not contain Nb, V, cr, ni, mo, mg noble metals, and the invention does not need secondary quenching. The production cost and difficulty are lower than those of the invention.
Disclosure of Invention
The invention aims to provide a low-cost high-toughness HB400 grade wear-resistant steel plate for a mining truck bottom plate and a production method thereof, wherein the wear-resistant steel plate for the mining truck bottom plate with the thickness of 16-20 mm is prepared, and the wear-resistant steel plate with high strength, high hardness and high impact toughness is obtained on the premise of low cost by reasonably designing low-cost components and matching with proper rolling and heat treatment processes, so that social resources are saved, and the low-carbon social construction is assisted.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to a low-cost high-toughness HB 400-grade wear-resistant steel plate for a mining truck bottom plate, which comprises the following chemical components in percentage by weight: 0.17-0.19%, si:0.30-0.35%, mn:1.20-1.30%, P: less than or equal to 0.020 percent, S: less than or equal to 0.005 percent, ti:0.008-0.018%, B:0.0010 to 0.0020 percent, and the balance of Fe and unavoidable impurities.
Further, the steel plate comprises the following chemical components in percentage by weight: 0.187%, si:0.31%, mn:1.20%, P:0.015%, S:0.003%, ti:0.017%, B:0.0017%, the balance being Fe and unavoidable impurities.
Further, the steel plate comprises the following chemical components in percentage by weight: 0.179%, si:0.33%, mn:1.25%, P:0.014%, S:0.002%, ti:0.014%, B:0.0016%, the balance being Fe and unavoidable impurities.
Further, the steel plate comprises the following chemical components in percentage by weight: 0.172%, si:0.35%, mn:1.29%, P:0.011%, S:0.003%, ti:0.013%, B:0.0010% and the balance of Fe and unavoidable impurities.
A production method of a low-cost high-toughness HB 400-grade wear-resistant steel plate for a mining truck bottom plate comprises the following main technological parameters:
1) Smelting and casting
The molten iron used for smelting needs desulfurization pretreatment; adding low-sulfur scrap steel and nickel plates in converter smelting, wherein the nickel plates are added together with the scrap steel, and the tapping temperature is more than or equal to 1620 ℃; LF refining ensures white slag formation time and molten steel components; in RH vacuum treatment, the vacuum treatment time is 20min, and the requirements of the degassed molten steel are met: h is less than or equal to 2.0ppm, and N is less than or equal to 70ppm;
the continuous casting adopts protection casting, the casting process has stable pulling speed, and the pulling speed is selected to be in the range of 0.80-1.2 m/min; stacking and slow cooling after the continuous casting blank is off line;
2) Heating and rolling
The tapping temperature of the slab is 1150+/-20 ℃; adopting two-stage rolling, wherein the finish rolling temperature is 800-830 ℃, and the temperature is rapidly cooled to 650-670 ℃ after rolling;
3) Heat treatment of
The steel plate adopts a heat treatment process of quenching and tempering;
the quenching process comprises the following steps: keeping the temperature at 880+/-10 ℃, keeping the temperature for 10-20 min, and quenching;
tempering: and (5) preserving the temperature at 190+/-10 ℃ for 30-60 min, and then discharging and slowly cooling.
Compared with the prior art, the invention has the beneficial technical effects that:
the invention obtains the wear-resistant steel plate with high strength, high hardness and high toughness on the premise of low cost, prolongs the service life of the product, saves social resources and helps to build a low-carbon society.
Drawings
The invention is further described with reference to the following description of the drawings.
FIG. 1 is a metallographic structure of example 1;
FIG. 2 is a metallographic structure of example 2;
FIG. 3 shows the metallographic structure of example 3.
Detailed Description
A wear-resistant steel plate with the thickness of 16-20 mm for a low-cost high-toughness HB 400-grade mining vehicle bottom plate and a production method thereof. The HB 400-grade steel for the mining truck bottom plate with high strength, high hardness and high toughness can be obtained through low alloy and low cost component design and matching with corresponding production technology.
The production method specifically comprises the following steps:
1. smelting
The molten iron used for smelting needs desulfurization pretreatment. Adding low-sulfur scrap steel and nickel plates in converter smelting, wherein the nickel plates are added together with the scrap steel, and the tapping temperature is more than or equal to 1620 ℃. LF refining ensures white slag formation time and molten steel components. In RH vacuum treatment, the vacuum treatment time is 20min, and the requirements of the degassed molten steel are met: h is less than or equal to 2.0ppm, and N is less than or equal to 70ppm.
2. Continuous casting
The continuous casting adopts protection casting, the casting process has stable pulling speed, and the pulling speed is selected to be in the range of 0.80-1.2 m/min. And (5) stacking and slow cooling after the continuous casting blanks are taken off line.
3. Heating and rolling
The tapping temperature of the slab is 1150+/-20 ℃. Two-stage rolling is adopted, the finish rolling temperature is 800-830 ℃, and the temperature is rapidly cooled to 650-670 ℃ after rolling.
4. Heat treatment process
The steel plate adopts a heat treatment process of quenching and tempering.
The quenching process comprises the following steps: the heat preservation temperature is 880+/-10 ℃, and the heat preservation time is 10-20 min for quenching.
Tempering: and (5) preserving the temperature at 190+/-10 ℃ for 30-60 min, and then discharging and slowly cooling.
Example 1
The chemical composition weight percentages of the steel sheet are shown in table 1 below. The tapping temperature of the slab rolling is 1175 ℃. Two-stage rolling is adopted, the finish rolling temperature is 827 ℃, and the temperature is rapidly cooled to 666 ℃ after rolling. The quenching process comprises the following steps: and (3) preserving heat for 20min at 875 ℃ and quenching. Tempering: and (5) preserving the temperature for 35min at 195 ℃, and then discharging and slowly cooling. The steel plate can be obtained. The properties of the steel plate are shown in Table 2, and the metallographic structure is shown in FIG. 1.
Example 2
The chemical composition weight percentages of the steel sheet are shown in table 1 below. The tapping temperature of the slab rolling is 1145 ℃. Two-stage rolling is adopted, the finish rolling temperature is 817 ℃, and the temperature is rapidly cooled to 657 ℃ after rolling. The quenching process comprises the following steps: heat preservation for 15min at 883 ℃ for quenching; tempering: and (5) preserving heat for 45min at 190 ℃, and then discharging and slowly cooling. The steel plate can be obtained. The properties of the steel plates are shown in Table 2, and the metallographic structures are shown in FIG. 2.
Example 3
The chemical composition weight percentages of the steel sheet are shown in table 1 below. The tapping temperature of the slab rolling is 1134 ℃. Two-stage rolling is adopted, the finish rolling temperature is 800-830 ℃, and the temperature is quickly cooled to 651 ℃ after rolling. The quenching process comprises the following steps: keeping the temperature at 880 ℃ for 12min for quenching; tempering: and (5) keeping the temperature at 185 ℃ for 55min, and then discharging and slowly cooling. The steel plate can be obtained. The properties of the steel plates are shown in Table 2, and the metallographic structures are shown in FIG. 3.
Table 1: chemical composition (wt%)
| C | Si | Mn | P | S | Ti | B |
| 0.187 | 0.31 | 1.2 | 0.015 | 0.003 | 0.017 | 0.0017 |
| 0.179 | 0.33 | 1.25 | 0.014 | 0.002 | 0.014 | 0.0016 |
| 0.172 | 0.35 | 1.29 | 0.011 | 0.003 | 0.013 | 0.001 |
Table 2: steel sheet Property
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (5)
1. The low-cost high-toughness HB 400-grade wear-resistant steel plate for the mining truck bottom plate is characterized by comprising the following chemical components in percentage by weight: 0.17-0.19%, si:0.30-0.35%, mn:1.20-1.30%, P: less than or equal to 0.020 percent, S: less than or equal to 0.005 percent, ti:0.008-0.018%, B:0.0010 to 0.0020 percent, and the balance of Fe and unavoidable impurities.
2. The low-cost high-toughness HB400 grade wear-resistant steel plate for mining truck bottom plates according to claim 1, wherein the steel plate comprises the following chemical components in percentage by weight: 0.187%, si:0.31%, mn:1.20%, P:0.015%, S:0.003%, ti:0.007%, B:0.0017%, the balance being Fe and unavoidable impurities.
3. The low-cost high-toughness HB400 grade wear-resistant steel plate for mining truck bottom plates according to claim 1, wherein the steel plate comprises the following chemical components in percentage by weight: 0.179%, si:0.33%, mn:1.25%, P:0.014%, S:0.002%, ti:0.004%, B:0.0016%, the balance being Fe and unavoidable impurities.
4. The low-cost high-toughness HB400 grade wear-resistant steel plate for mining truck bottom plates according to claim 1, wherein the steel plate comprises the following chemical components in percentage by weight: 0.172%, si:0.35%, mn:1.29%, P:0.011%, S:0.003%, ti:0.003%, B:0.0010% and the balance of Fe and unavoidable impurities.
5. The production method of the low-cost high-toughness HB 400-grade wear-resistant steel plate for the mining vehicle bottom plate according to any one of claims 1 to 4, wherein main process parameters are as follows:
1) Smelting and casting
The molten iron used for smelting needs desulfurization pretreatment; adding low-sulfur scrap steel and nickel plates in converter smelting, wherein the nickel plates are added together with the scrap steel, and the tapping temperature is more than or equal to 1620 ℃; LF refining ensures white slag formation time and molten steel components; in RH vacuum treatment, the vacuum treatment time is 20min, and the requirements of the degassed molten steel are met: h is less than or equal to 2.0ppm,
N≤70ppm；
the continuous casting adopts protection casting, the casting process has stable pulling speed, and the pulling speed is selected to be in the range of 0.80-1.2 m/min; stacking and slow cooling after the continuous casting blank is off line;
2) Heating and rolling
The tapping temperature of the slab is 1150+/-20 ℃; adopting two-stage rolling, wherein the finish rolling temperature is 800-830 ℃, and the temperature is rapidly cooled to 650-670 ℃ after rolling;
3) Heat treatment of
The steel plate adopts a heat treatment process of quenching and tempering;
the quenching process comprises the following steps: keeping the temperature at 880+/-10 ℃, keeping the temperature for 10-20 min, and quenching;
tempering: and (5) preserving the temperature at 190+/-10 ℃ for 30-60 min, and then discharging and slowly cooling.
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| CN202311232287.6A CN117363989A (en) | 2023-09-22 | 2023-09-22 | Low-cost high-toughness HB 400-grade wear-resistant steel plate for mining truck bottom plate and production method thereof |
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| CN202311232287.6A CN117363989A (en) | 2023-09-22 | 2023-09-22 | Low-cost high-toughness HB 400-grade wear-resistant steel plate for mining truck bottom plate and production method thereof |
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Citations (12)
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|---|---|---|---|---|
| WO2001042523A1 (en) * | 1999-12-08 | 2001-06-14 | Nkk Corporation | Wear-resistant steel product and method for production thereof |
| CN101649414A (en) * | 2008-08-15 | 2010-02-17 | 宝山钢铁股份有限公司 | Low alloy easy-welding and wear-resistant steel, steel plate and manufacturing method |
| CN101691640A (en) * | 2009-09-01 | 2010-04-07 | 东北大学 | High strength low alloy wear resistance steel plate and preparation method thereof |
| CN102605234A (en) * | 2011-01-25 | 2012-07-25 | 宝山钢铁股份有限公司 | 400HB-grade wear-resistant steel and method for manufacturing same |
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