CN113718158A - Production method of steel for high-strength saw blade of mine - Google Patents
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- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/116—Refining the metal
- B22D11/117—Refining the metal by treating with gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
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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
- C21D8/02—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
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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
- C21D8/02—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
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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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
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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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- 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
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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
- C22C38/06—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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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Abstract
The production method of the steel for the mine high-strength saw blade comprises the process route of molten iron pretreatment → converter smelting → LF furnace → VD vacuum treatment → continuous casting → heating → rolling→ offline quenching → tempering → performance inspection; the steel comprises the following chemical components in percentage by weight: c = 0.17-0.20, Si = 0.17-0.37, Mn = 1.40-1.60, Ti = 0.05-0.12, B = 0.0010-0.0020, P is less than or equal to 0.015, S is less than or equal to 0.003, Als = 0.02-0.040, and the balance is Fe and inevitable impurities. The plasticity and the welding performance of the steel are good, the yield strength Rp0.2 of the finished steel plate after tempering is more than or equal to 1000MPa, the tensile strength Rm is more than or equal to 1200MPa, and the elongation percentage A is50The surface hardness of the whole plate is more than or equal to 18 percent, the hardness of the whole plate is 32.0-37.9 HRC, the impact work value at 0 ℃ is more than or equal to 100J, and the requirement of the high-strength saw blade steel for mines is met.
Description
Technical Field
The invention belongs to the steel smelting technology, and particularly relates to a production method of high-strength saw blade matrix steel for mine exploitation.
Background
The saw blade steel for mines is made of a hot rolled thin plate or a medium-thick plate with high strength and high wear resistance of 2.0-16.0 mm, and has high strength, high hardness and certain toughness. The traditional production mode of the disk saw blade steel for mines is as follows: the steel mill is responsible for producing the board for the saw blade, the saw blade manufacturer processes the board into a circular sheet body, and a circle of saw teeth are welded on the periphery of the saw blade steel after the processing is finished to produce the saw blade. The saw blade with the diameter less than 2000mm is produced by rolling through a hot continuous rolling mill set, and the saw blade with the diameter more than 2000mm is produced by a tailor welding process or by rolling through a heavy and medium plate mill. In order to ensure the performance of the saw blade steel matrix, oil quenching and quenching heat treatment is needed, which generally comprises pretreatment, quenching heating and cooling treatment, and has the defects of complex heat treatment process, high requirements on a treating agent and a quenching agent, high cost, large oil quenching smoke, environmental friendliness and the like.
The commonly used materials of the steel for the mine saw blade produced at present comprise 75CrL, 65Mn, 52Mn2V and the like, and the steel mainly comprises high-carbon and high-alloy components, and has high strength, high rigidity, poor plasticity and toughness and high alloy cost. The steel with high carbon equivalent is not easy to weld in the production of the saw blade, cracks are easy to generate in the processing and using processes, and the service life is short. And the addition of Mo, Cr and Ni alloy elements can form iron scales with strong adhesive force on the surface of the steel plate, influence the surface quality of the saw blade steel and increase the subsequent grinding cost.
Chinese patent 'CN 102296243A' discloses a steel for diamond saw blade base and a production method thereof, which comprises the following chemical components: c: 0.67% -0.75%, Si: 0.17% -0.37%, Mn: 0.9-1.20%, Cr: 0.4-0.7 percent of heat-treated medium plate, less than or equal to 0.25 percent of Ni and less than or equal to 0.2 percent of Cu, high carbon content, Ni and Cr, high alloy cost, easy occurrence of defects such as segregation and the like, influence on service life, and simultaneously contain a certain amount of Cu to be not beneficial to controlling surface cracks of casting blanks.
Chinese patent CN104178691A "a high strength steel for metallurgical saw blade and its manufacturing method" discloses chemical components: c: 0.30% -0.60%, Si: 0.15-0.30%, Mn: 1.35% -1.9%, V: 0.070% -0.19%, Al: the heat treatment steel plate with the hardness of 0.025-0.055 percent has the large fluctuation range of 28-40 HRC of the hardness of the finished steel plate after quenching and tempering, and is not suitable for directly processing and manufacturing the saw blade matrix with the diameter of more than 2000 mm.
Chinese patent CN 106319378B 'A steel for large diameter thin saw blade matrix and its manufacturing method' discloses chemical components: c: 0.72% -0.95%, Si: 0.06% -0.40%, Mn: 0.5-0.95%, Cr: 0.10% -0.39%, V: 0.03 to 0.080 percent of Ni, less than or equal to 0.5 percent of Ni, less than or equal to 0.0002 percent of H, less than or equal to 0.015 percent of impurity element P, less than or equal to 0.010 percent of S and less than or equal to 0.010 percent of Al, the C, Mn content of the heat-treated steel plate is extremely high, the welding of a tool bit is not facilitated, and simultaneously, the content of noble alloy elements of Cr and Ni is high and the alloy cost is high. And subsequent saw blade manufacturing units need oil quenching, the requirement on a quenching medium is high, and the environment is polluted.
Chinese patent CN104178691a "a high strength steel for metallurgical saw blade and its heat treatment method", discloses chemical components: 0.30 to 0.60 percent of C, 0.15 to 0.30 percent of Si, 1.35 to 1.90 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.005 percent of S, 0.07 to 0.19 percent of V, 0.025 to 0.055 percent of Al and the balance of Fe. The C content is high, the V content is 0.07-0.19%, the control of continuous casting billet cracks is not facilitated, and the actual control difficulty in the production of medium and thin gauge plates is high due to the requirement of 200-300 ℃ on the quenching final cooling temperature.
The steel grade mentioned in the above documents and inventions has some defects, which do not meet the development requirements of the mining saw blade industry at present. Therefore, there is an urgent need to develop a new steel for saw blades, which has high hardenability, high thermal stability, easy welding, high toughness and plasticity, and can significantly improve the service life of the saw blade.
Disclosure of Invention
The invention aims to provide saw blade steel for mine exploitation produced by rolling a medium plate mill and a manufacturing method thereof. The steel for the saw blade has the characteristics of low alloy cost, easy welding, environmental friendliness, high hardenability, high thermal stability and high toughness and plasticity, and can greatly prolong the service life.
The technical scheme of the invention is as follows:
the production method of the steel for the high-strength saw blade of the mine comprises the process route of molten iron pretreatment → converter smelting → LF furnace → RH vacuum treatment → continuous casting → heating → rolling → offline quenching → tempering → performance inspection. The steel comprises the following chemical components in percentage by weight: c = 0.17-0.20, Si = 0.17-0.37, Mn = 1.40-1.60, Ti = 0.05-0.12, B = 0.0010-0.0020, P is less than or equal to 0.015, S is less than or equal to 0.003, Als = 0.02-0.040, and the balance is Fe and inevitable impurities; the key process steps comprise:
(1) converter: controlling the C to be more than or equal to 0.06% during tapping, controlling the P to be less than or equal to 0.015%, controlling the tapping temperature to be 1600-1620 ℃, adding ferrosilicon, manganese metal, aluminum-iron deoxidization, lime and premelting slag during tapping, and feeding an Al wire after tapping to enable Als to be = 0.020-0.040% in molten steel;
(2) and (4) LF furnace: smelting the molten steel in an LF furnace, adding lime and 12-15 kg/t molten steel of pre-melted slag for slagging, adding SiC and Al particles for diffusion deoxidation, wherein Als =0.02% -0.05% in the molten steel; after C, Si, Mn and S elements are adjusted to a required range, the white slag holding time is more than or equal to 20min, ferrotitanium is added before the white slag is taken out of the station, the molten steel Ti =0.08%, soft blowing is carried out for 5min, and 0.3-0.4 kg/t of molten steel of a calcium wire is fed;
(3) RH furnace: argon is blown in the RH furnace in the whole process, the vacuum degree is kept for 15min under the pressure of less than 67Pa, and whether ferrotitanium is supplemented or not is determined according to the Ti content of the LF outgoing station; after the air is broken, adding B iron into molten steel, wherein the target content range B = 0.0015-0.0020%, and soft blowing is carried out for more than or equal to 15 min;
(4) continuous casting: the whole process is protected and cast, a dynamic soft reduction technology is adopted, the degree of superheat of a tundish is 6-13 ℃, and the steel passing amount is 3.8-4.2 t/min; the continuous casting mold flux adopts special mold steel mold flux, and the secondary cooling specific water amount is controlled to be 0.33-0.37L/kg;
(5) rolling: hot charging of a plate blank, wherein the heating temperature is 1240-1260 ℃, the initial rolling temperature of rough rolling is more than or equal to 1200 ℃, the initial rolling temperature of finish rolling is more than or equal to 1050 ℃, the rolling process adopts high-temperature high-pressure quick rolling, the reduction rate of at least one pass in the final rolling stage of rough rolling is more than 20%, water is not required after finish rolling, and the plate blank is air-cooled to room temperature;
(6) quenching: the quenching temperature is 870-900 ℃, the temperature is kept for 10-15 min after the target temperature is reached, and then 5bar pressure quenching water cooling is adopted;
(7) tempering: and (3) charging and tempering the quenched steel plate at 250-300 ℃, preserving heat for 10-15 min after reaching the target temperature, and then air cooling.
The action mechanism of each alloy component of the steel is as follows:
c is a main solid solution strengthening element in steel. The content of C is 0.17-0.20%, so that the strength can be ensured, the carbon equivalent can be reduced, the welding performance is improved, the C segregation is reduced, and the plasticity of the steel is improved.
Mn is an essential element for ensuring the strength and toughness of the steel, and has little influence on plasticity. Manganese is dissolved in austenite in a solid state, so that the martensite transformation temperature can be sharply reduced, and the rigidity hardenability can be improved. Mn is easily combined with residual elements S to form MnS, so that the hot cracking caused by the formation of FeS film at the grain boundary is avoided to influence the hot workability of the steel for the saw blade. And Mn can also increase hardenability. The Mn content of the invention is lower by 1.40-1.60%, the requirement of high strength and hardness after heat treatment can be met, segregation bands are easily increased due to overhigh Mn content to influence the welding performance, and the production cost is increased.
Si is a common alloy element in steel and also used as a reducing agent and a deoxidizing agent in the steelmaking process, and the Si exists in austenite in a solid solution form, so that the elastic limit and the yield strength of the steel can be obviously improved, the fatigue strength is improved, the wear resistance is improved, and the plasticity, the toughness and the welding performance of the steel can be reduced when the content is higher.
Al is generally used as a deoxidizer during smelting, crystal grains can be refined, the strength is improved, but oxide inclusions containing Al are easily formed at the same time, and the fatigue performance of steel is influenced. In order to ensure the fatigue performance of the saw blade steel and prolong the service life of the saw blade steel, the content of Als in the saw blade steel is limited to 0.020-0.050%, and the saw blade steel can fully deoxidize and improve the performance.
The element B can be gathered in the grain boundary, the grain boundary energy is reduced, the hardenability of the steel can be obviously improved by adding a trace amount of B, the microstructure of the steel is not influenced, and the heat resistance of the steel can be improved by the element B. Because the activity of B is strong and the B is easy to form a compound with C, N element, excessive B can cause hot brittleness of steel and influence hot workability to ensure that the B is in a solid solution state, and the B content is generally controlled to be below 0.0050%, and the B content is 0.0010% -0.0020% in the invention.
Ti is a good deoxidizer and an element for fixing nitrogen and carbon, Ti (CN) particles formed in the rolling process can be controlled to effectively refine grains, the improvement of welding performance is facilitated, the heat strength of carbon steel can be improved, creep resistance is improved, the hardenability of the steel can be improved due to the Ti existing in a solid solution state, the alloy cost is low, and the Ti is an important alloy element and is added in an amount of 0.05-0.12%.
P and S are inevitable harmful impurities in steel, and the existence of the impurities can seriously deteriorate the toughness of the steel, influence the fatigue performance and shorten the service life of a saw blade. Measures are therefore taken to reduce the P and S contents of the steel as far as possible, the maximum P content being limited to 0.015% and the maximum S content to 0.003% according to the invention.
Compared with the prior art, the invention has the following advantages:
the invention adopts C-Si-Mn-Ti component and low-P low-S system, adds B to improve the hardenability of steel, does not add other alloy elements, ensures the purity of molten steel by proper steelmaking process, ensures the core quality of casting blank by low superheat degree combined with dynamic soft reduction, has low segregation degree and carbon equivalent, good plasticity and welding performance of steel, the yield strength Rp0.2 of finished steel plate after tempering is more than or equal to 1000MPa, the tensile strength Rm is more than or equal to 1200MPa, and the elongation A is50The surface hardness of the whole plate is more than or equal to 18 percent, the hardness of the whole plate is 32.0-37.9 HRC, the impact work value at 0 ℃ is more than or equal to 100J, and the requirement of the high-strength saw blade steel for mines is met.
Drawings
FIG. 1 is a photograph (500X) of the tempered metallographic structure of saw blade steel.
FIG. 2 is an SEM microstructure photograph (1000X) of the tempered saw blade steel.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
The production method of the steel for the high-strength saw blade of the mine comprises the following key process steps of a converter → an LF furnace → an RH furnace → continuous casting → rolling → quenching → tempering → performance inspection, wherein the chemical components are shown in a table 1:
(1) converter: tapping C0.08%, P0.011%, tapping 1608 deg.C, adding ferrosilicon and manganese alloy for alloying, adding ferroaluminum for deoxidation, adding appropriate amount of lime and pre-melted slag for slagging, and tapping Als 0.035%;
(2) and (4) LF furnace: adding lime and premelting slag to total 13.8kg/t of molten steel, adding 1.0kg/t of SiC molten steel and 0.3kg/t of Al grain SiC, wherein the Als content in the molten steel process is 0.02-0.05%; after adjusting the elements C, Si, Mn and S to the required range, keeping the white slag for 28min, adding ferrotitanium before leaving the station, wherein the Ti content of the leaving station is 0.085 percent, carrying out soft blowing for 5min, and feeding 0.35kg/t molten steel of a calcium line;
(3) RH furnace: blowing argon in the whole RH process, keeping the vacuum degree at less than 67Pa for 16min, breaking the air, adding B iron, discharging B with the content of 0.0018%, and soft-blowing for 18 min;
(4) continuous casting: the continuous casting process is protected, a dynamic soft reduction technology is adopted, the degree of superheat of a tundish is 8-11 ℃, and the steel passing amount is 4.0 t/min; the continuous casting mold flux adopts special mold steel mold flux, the water distribution adopts weak cooling, and the water quantity of the secondary cooling is controlled to be 0.35L/kg.
(5) The parameters of the rolling and heat treatment processes are shown in Table 2.
(6) The mechanical property test results of the steels are shown in Table 3.
Example 2
The production method of the steel for the high-strength saw blade of the mine comprises the following key process steps of a converter → an LF furnace → an RH furnace → continuous casting → rolling → quenching → tempering → performance inspection, wherein the chemical components are shown in a table 1:
(1) converter: tapping C0.07%, P0.009%, tapping temperature 1616 deg.C, adding ferrosilicon and manganese metal alloy for alloying, adding aluminum and iron for deoxidation, adding appropriate amount of lime and pre-melted slag for slagging, and tapping out of the station to obtain Als 0.029%;
(2) and (4) LF furnace: adding lime and premelting slag to total 14.2kg/t of molten steel, adding 0.9kg/t of SiC molten steel and 0.4kg/t of Al grain SiC, wherein the Als content is 0.02-0.05% in the molten steel process; after adjusting elements C, Si, Mn and S to a required range, keeping white slag for 37min, adding ferrotitanium before leaving the station, wherein the Ti content of the leaving station is 0.087 percent, carrying out soft blowing for 5min, and feeding 0.35kg/t molten steel of a calcium line;
(3) RH furnace: blowing argon in the whole RH process, keeping the vacuum degree at less than 67Pa for 16min, breaking the air, adding B iron, discharging B with the content of 0.0017%, and soft-blowing for 20 min;
(4) continuous casting: the continuous casting process is protected, a dynamic soft reduction technology is adopted, the degree of superheat of a tundish is 9-11 ℃, and the steel passing amount is 4.0 t/min; the continuous casting mold flux adopts special mold steel mold flux, water distribution adopts weak cooling, and the secondary cooling specific water quantity is controlled to be 0.35L/kg;
(5) the parameters of the rolling and heat treatment processes are shown in Table 2.
(6) The mechanical property test results of the steels are shown in Table 3.
Table 1 chemical composition of example steels (wt,%)
Table 210 mm 4850mm saw blade steel rolling and quenching and tempering heat treatment process parameters
Saw blade steel with table of 310 mm multiplied by 4850mm in mechanical property
Claims (1)
1. A production method of steel for a high-strength saw blade of a mine; the steel comprises the following chemical components, by weight, 0.17-0.20% of C, 0.17-0.37% of Si, 1.40-1.60% of Mn, 0.05-0.12% of Ti, 0.0010-0.0020% of B, 0.015% or less of P, 0.003% or less of S, 0.02-0.040% of Als, and the balance of Fe and inevitable impurities; the key process steps comprise:
(1) converter: controlling the C to be more than or equal to 0.06% during tapping, controlling the P to be less than or equal to 0.015%, controlling the tapping temperature to be 1600-1620 ℃, adding ferrosilicon, manganese metal, aluminum-iron deoxidization, lime and premelting slag during tapping, and feeding an Al wire after tapping to enable Als to be = 0.020-0.040% in molten steel;
(2) and (4) LF furnace: smelting the molten steel in an LF furnace, adding lime and 12-15 kg/t molten steel of pre-melted slag for slagging, adding SiC and Al particles for diffusion deoxidation, wherein Als =0.02% -0.05% in the molten steel; after C, Si, Mn and S elements are adjusted to a required range, the white slag holding time is more than or equal to 20min, ferrotitanium is added before the white slag is taken out of the station, the molten steel Ti =0.08%, soft blowing is carried out for 5min, and 0.3-0.4 kg/t of molten steel of a calcium wire is fed;
(3) RH furnace: argon is blown in the RH furnace in the whole process, the vacuum degree is kept for 15min under the pressure of less than 67Pa, and whether ferrotitanium is supplemented or not is determined according to the Ti content of the LF outgoing station; after the air is broken, adding B iron into molten steel, controlling B = 0.0015-0.0020%, and soft blowing for more than or equal to 15 min;
(4) continuous casting: the whole process is protected and cast, a dynamic soft reduction technology is adopted, the degree of superheat of a tundish is 6-13 ℃, and the steel passing amount is 3.8-4.2 t/min; the continuous casting mold flux adopts special mold steel mold flux, and the secondary cooling specific water amount is controlled to be 0.33-0.37L/kg;
(5) rolling: hot charging of a plate blank, wherein the heating temperature is 1240-1260 ℃, the initial rolling temperature of rough rolling is more than or equal to 1200 ℃, the initial rolling temperature of finish rolling is more than or equal to 1050 ℃, the rolling process adopts high-temperature high-pressure quick rolling, the reduction rate of at least one pass in the final rolling stage of rough rolling is more than 20%, water is not required after finish rolling, and the plate blank is air-cooled to room temperature;
(6) quenching: the quenching temperature is 870-900 ℃, the temperature is kept for 10-15 min after the target temperature is reached, and then 5bar pressure quenching water cooling is adopted;
(7) tempering: and (3) charging and tempering the quenched steel plate at 250-300 ℃, preserving heat for 10-15 min after reaching the target temperature, and then air cooling.
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| CN117107156A (en) * | 2023-08-27 | 2023-11-24 | 湖南华菱湘潭钢铁有限公司 | Steel for mine high-strength saw blade matrix and production method thereof |
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| CN104451382A (en) * | 2014-11-24 | 2015-03-25 | 广西柳工机械股份有限公司 | Abrasion-resistant profile steel and abrasion-resistant cutting board |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117107156A (en) * | 2023-08-27 | 2023-11-24 | 湖南华菱湘潭钢铁有限公司 | Steel for mine high-strength saw blade matrix and production method thereof |
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