CN110777295A - Hot-rolled steel strip for diamond saw blade base and manufacturing method thereof - Google Patents
Hot-rolled steel strip for diamond saw blade base and manufacturing method thereof Download PDFInfo
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- CN110777295A CN110777295A CN201910942492.9A CN201910942492A CN110777295A CN 110777295 A CN110777295 A CN 110777295A CN 201910942492 A CN201910942492 A CN 201910942492A CN 110777295 A CN110777295 A CN 110777295A
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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
- 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
- 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
- C22C38/04—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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
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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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
Abstract
The invention provides a hot-rolled steel strip for a diamond saw blade substrate and a manufacturing method thereof, wherein the steel strip comprises the following components in percentage by weight: c: 0.48% -0.57%, Si: 0.20-0.36%, Mn: 1.21% -1.50%, V: 0.06% -0.14%, Cr: 0.16 to 0.29 percent of the total Fe content, less than or equal to 0.020 percent of impurity element P, less than or equal to 0.009 percent of S, and the balance of Fe and inevitable impurities. The manufacturing method comprises smelting, continuous casting, heating, rolling and cooling; the hardness of the saw blade matrix blank processed by the steel plate can reach more than 47HRC after heat treatment, the tensile strength reaches more than 1350MPa, the elongation reaches more than 12%, the thermal stability is excellent, and the thickness range of the product is 3-16 mm.
Description
Technical Field
The invention belongs to the field of metal materials, and particularly relates to a hot-rolled steel strip for a diamond saw blade substrate and a manufacturing method thereof, in particular to a hot-rolled steel strip for a diamond saw blade substrate by applying stone cutting and a manufacturing method thereof.
Background
In recent years, the number of artificial diamonds used in the stone processing industry has been increasing, and the consumption thereof accounts for about 90% of the total production of artificial diamonds in the country, and domestic diamond saw blade substrates are also mainly used in the stone processing industry. According to material classification, the materials for producing the diamond saw blade matrix at home at present mainly comprise 65Mn, 75Crl and other materials, and some low-end markets also comprise 45# steel. The 45# steel is common carbon steel, 65Mn is common spring steel, and 75Crl is high-carbon alloy steel. After the heat treatment, the steel for the diamond saw blade substrate not only needs high hardness, but also needs good plastic toughness and certain heat resistance, and along with the rapid development of the domestic saw blade industry, the traditional steel for the saw blade substrate such as 65Mn and the like has the following defects that firstly, the hardness after the heat treatment is insufficient, the wear resistance is poor, secondly, the brittleness is higher, the plastic toughness is slightly poor, the service life is short, and the cost is high.
The invention discloses a steel for a large-diameter thin saw blade matrix (CN106319378A), which comprises the following components in percentage by weight: 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 method comprises the steps of deoxidizing molten steel by using Si, carrying out hot feeding and hot charging on a plate blank, carrying out finish rolling at the beginning of 1050-1150 ℃ and the end of 900-980 ℃, carrying out post-cooling by adopting laminar cooling, cooling to 680-800 ℃ for coiling, carrying out slow cooling in a slow cooling pit within 30 minutes after coiling, heating to 850-980 ℃ after cold punching of hot rolled strip steel into a saw blade matrix, and carrying out heat preservation for 10-40 min for quenching. The technology has the advantages of high hardness, good wear resistance and the like, but the excessively high C content is high in plasticity, poor in toughness and high in brittleness, the probability of fracture of the saw blade in the running process and short in fatigue life is high, and the service life is reduced.
The invention discloses a steel for a hot-rolled ultrathin laser welding saw blade base and a production method (CN104087839A), and the technical scheme of the steel for the hot-rolled ultrathin laser welding saw blade base comprises the following steps: 0.26-0.34%, Si: 0.25-0.37%, Mn: 0.40% -0.60%, P: less than or equal to 0.015 percent, S: less than or equal to 0.005 percent, N: less than or equal to 0.006 percent, Cr: 0.80-1.10%, Mo: 0.15-0.25%, Ti: 0.005-0.045. Smelting and continuously casting into a blank; heating a casting blank; rolling; laminar cooling; coiling; slowly cooling the steel coil to room temperature in a warehouse or a heat preservation cover; and (6) finishing. The tensile strength of the steel plate is 600-900 MPa, the elongation A is 15-28%, the hardness is 160-260 HB, the fluctuation of the tensile strength of the head and the middle of the steel coil is less than 150MPa, the thickness of a single-side decarburized layer is less than or equal to 1.1% of the thickness of the steel plate, the fluctuation of the hardness after quenching is less than 2HRC, the thickness reduction of the edge part is less than or equal to 100 mu m, the unevenness is less than or equal to 12mm/m, and the thickness of the product is 1.0-3.. The technology has the advantages of low C content, insufficient hardness, thin thickness and narrow application range.
The invention discloses steel for a diamond saw blade substrate and a production method thereof (CN102296243A), and the steel for the substrate adopts the technical scheme that: 0.67-0.75% of C, 0.17-0.37% of Si, 0.90-1.20% of Mn, less than or equal to 0.030% of P, less than or equal to 0.025% of S, less than or equal to 0.25% of Ni, 0.4-0.7% of Cr and less than or equal to 0.20% of Cu. Quenching and tempering the hot-rolled steel plate, wherein the quenching and heating temperature is 890 +/-10 ℃, the heat preservation time is 2-3 min/mm, and oil cooling is carried out; tempering and heating at 530-620 ℃, keeping the temperature for 4-6 min/mm, and air cooling. The steel for the diamond saw blade substrate has the advantages of good hardenability, weldability, thermal stability, strong tempering softening resistance, high strength, plasticity and toughness, tensile strength of 1013-1510 MPa and elongation percentage after fracture of 10-16%. The invention has high C design, the main strengthening components are C, Si, Mn and Cr, which are beneficial to the strength and the hardness, and the ductility and the toughness are not improved.
The invention discloses a steel for saw blade matrix and a manufacturing method thereof (CN 102134681A). in the technical content disclosed by the invention, C in the steel for saw blade matrix comprises the following components: 0.68-0.80%, Cr: 0.30-0.70%, Mn: 0.50 to 1.00%, Si: 0.10-0.50%, V: 0.03 to 0.15, Ca: 0-0.0050%, N: 0.0050-0.010%, Alt: 0.005-0.04%, P: less than or equal to 0.02% and S: less than or equal to 0.01 percent. The smelted molten steel is subjected to continuous casting or die casting, and is subjected to primary rolling to form a billet after die casting; slowly cooling a continuous casting billet or a bloom billet after die casting; heating a continuous casting billet or a primary rolling billet within the temperature range of 1100-1250 ℃, wherein the outlet temperature of a roughing mill is more than or equal to 1050 ℃, the finish rolling temperature is 870-950 ℃, and naturally cooling a rolled steel plate; or hot rolling to prepare strip steel, wherein the finish rolling temperature is 870-950 ℃, and the coiling temperature is 720-820 ℃; and cooling at 0.1-5 ℃/s after coiling. The steel is then made into a saw blade, and after quenching and tempering, the hardness of the section of the whole saw blade body can reach more than HRC 43. The invention has higher hardness and better plasticity and toughness.
The invention relates to a stone cutting saw blade steel and a manufacturing method thereof (CN1904119A), and discloses the stone cutting saw blade steel, wherein the steel comprises 0.45-0.60% of C, 0.10-0.60% of Si, 1.30-1.80% of Mn, less than or equal to 0.02% of P, less than or equal to 0.01% of S, 0.05-0.20% of V, 0.15-0.30% of Cr, 0.005-0.020% of N, 0-0.0050% of Ca and 0.005-0.040% of Al. Smelting and casting, wherein a continuous casting blank adopts a hot delivery and hot charging process, and the temperature of the casting blank before entering a plate blank for heating is ensured to be more than 300 ℃; the heating temperature of the plate blank is more than 1150 ℃, and the finishing temperature is controlled to be more than 900 ℃ during hot rolling; air cooling and coiling are carried out after rolling, and the coiling temperature is controlled to be above 700 ℃. The hardenability of the steel is higher than that of common medium-carbon and low-alloy steel, and the steel is particularly suitable for manufacturing large saw blades with the diameter of more than 1000mm and used for cutting stone. Although the invention has better plasticity and toughness, the hardness is lower, which affects the wear resistance.
The invention relates to diamond saw blade matrix steel and a manufacturing method thereof (CN1241645A), and discloses diamond saw blade matrix steel, wherein the diamond saw blade matrix steel comprises 0.2-0.3% of C, 1.0-1.5% of Cr, 0.2-0.5% of Mo, 0.65-1.3% of Mn and 0.15-0.30% of Si. The carbon content of the steel is low, only 0.20-0.30%, the hardenability is not enough, and the steel can only be used for blades and circular saw blades with smaller diameters.
Invention "a diamond saw blade matrix steel" (CN 1827821A): 0.47-0.58% of C, 0.17-0.37% of Si, 1.51-2.00% of Mn, 0.005-0.07% of Nb, 0.0005-0.001% of B, less than or equal to 0.05% of Al, less than or equal to 0.01% of S, and less than or equal to 0.02% of P. Boron is easy to generate segregation, causes abnormal microstructure and is easy to crack.
Disclosure of Invention
The present invention has been made to overcome the above problems and disadvantages and an object of the present invention is to provide a steel for a diamond saw blade base having high hardness and good ductility and toughness, and a method for manufacturing the same.
The purpose of the invention is realized as follows:
a hot rolled steel strip for a diamond saw blade substrate comprises the following components in percentage by weight: c: 0.48% -0.57%, Si: 0.20-0.36%, Mn: 1.21% -1.50%, V: 0.06% -0.14%, Cr: 0.16 to 0.29 percent of the total Fe content, less than or equal to 0.020 percent of impurity element P, less than or equal to 0.009 percent of S, and the balance of Fe and inevitable impurities.
The invention has the following design reasons:
C：0.48％～0.57％。
c is a main solid-solution strengthening element in steel, and an increase in the content of carbon increases the strength of steel. However, the content of C is not good for welding and plasticity, and in order to ensure that the steel has good hardness after heat treatment and good plasticity and toughness, the content of C is moderate.
Si：0.20％～0.36％。
Si is one of common elements in steel and is used as a reducing agent and a deoxidizing agent in the steelmaking process, and Si in a solid solution form can improve the yield strength and the ductile-brittle transition temperature, but if the content of Si exceeds the upper limit, the toughness is reduced. It is therefore necessary that 0.1% to 0.40% of Si remain in the steel.
Mn：1.21％～1.50％
Mn is an essential element for securing the strength and toughness of steel. Manganese and iron form a solid solution, which can increase the hardness and strength of ferrite and austenite in steel.
V：0.06％～0.14％。
V can generate stable compounds with C in steel, can refine structures and crystal grains, improve the coarsening temperature of the crystal grains, obviously improve the performance of the steel, and can improve the strength, the toughness, the wear resistance and the like of the steel.
Cr：0.16％～0.29％。
Cr can strengthen α solid solution, change the precipitation form and type of carbide, and can improve the strength of grain boundary as an effective solid solution strengthening element, thereby improving the strength of steel.
P：≤0.020％、S：≤0.009％。
P and S are inevitable harmful impurities in steel, and the presence of P and S seriously deteriorates the toughness of steel, so that measures are taken to reduce the contents of P and S in steel as much as possible. According to the invention, the maximum P content is limited to 0.020% and the maximum S content to 0.006%.
The steel adopts the design of medium carbon and medium manganese, and adds a proper amount of Cr element on the basis of adding trace V element, thereby avoiding the over-high strength of the steel plate in a hot rolling state and influencing the processability of the product, improving the condition that the depth of a through hardening layer of the steel plate, particularly the steel plate with thick specification is insufficient due to adding single V element, ensuring the hardness of the steel plate after tempering, benefiting the plasticity and toughness of the tempered steel plate, greatly reducing the brittleness of the steel plate, leading the steel plate to have higher toughness matching, and effectively prolonging the service life of the saw blade.
The second technical scheme of the invention provides a manufacturing method of the hot rolled steel strip for the diamond saw blade substrate, which comprises smelting, continuous casting, heating, rolling, cooling and slow cooling.
(1) Smelting and continuous casting:
after LF and calcium treatment, the qualified molten steel smelted by the converter is subjected to steel billet continuous casting by a continuous casting machine, and electromagnetic stirring and soft reduction are added in the casting process. The thickness of the casting blank is 135 mm-300 mm, and the charging temperature of the casting blank is required to be more than 500 ℃.
(2) Heating:
in order to ensure that the plate blanks are completely burnt, and simultaneously avoid overhigh temperature and serious oxidation and decarburization caused by the heating time process to influence the surface hardness of the steel plate after heat treatment, the heating temperature of the plate blanks is 1165-1205 ℃, the temperature is kept for 1.5-4 hours, the steel is burnt in a neutral or weak reducing atmosphere, and the air-fuel ratio is controlled within the range of (1.7-2.0): 1;
(3) rolling: both rough rolling and finish rolling adopt high-pressure water for descaling, so that the surface quality of a finished steel plate is ensured; the initial rolling temperature of finish rolling is 1070-1120 ℃, and the final rolling temperature is controlled at 905-950 ℃;
(4) and (3) cooling: cooling to 700-750 ℃ by a laminar flow cooling interval intermittent sparse cooling mode and coiling. The steel sheet coils the back and immediately advances the slow cooling cover slow cooling that has the heat preservation function, and the slow cooling speed is not more than 10 ℃/h, and great temperature difference can not appear in its purpose messenger coil of strip interior outer lane, and the even temperature drop of whole to realize destressing's purpose, with reducing steel sheet stress, guarantee that the steel sheet is opened flat back plate shape straight, guarantee that the use is smooth.
After slow cooling, the steel coil is transversely cut and straightened by a high-strength transverse cutting machine set and then is cut into steel plates with required sizes.
The unevenness of the steel plate obtained by the manufacturing method is less than or equal to 5mm/m after the steel plate is flattened, which is beneficial to the manufacturing of the saw blade matrix. The total decarburization of the two sides of the steel plate is less than or equal to the thickness of the steel plate by 2.6 percent. The hot-rolled strip steel has the tensile strength of less than 900MPa, the hardness of less than or equal to 18HRC, the elongation of more than or equal to 16 percent, lamellar pearlite, granular pearlite and a very small amount of ferrite in the structure, and is excellent in hardness and plasticity matching and beneficial to processing of a saw blade matrix.
After the steel plate obtained by the manufacturing method is manufactured into a saw blade matrix, the following heat treatment process is adopted to obtain good performance.
And (3) heat treatment: quenching and tempering; heating the steel plate to 785-880 ℃, preserving heat for 5-20 min, quenching, wherein the quenching medium is cooling oil with the temperature of less than or equal to 80 ℃, and then tempering at 150-350 ℃ to obtain the hardness with the HRC of more than or equal to 47.
The invention has the beneficial effects that: the hot rolled strip steel smelted, continuously cast and rolled by the chemical components has the tensile strength of less than 900MPa, the hardness of less than or equal to 18HRC, the elongation of more than or equal to 18 percent, the depth of a decarburized layer of less than 3 percent of the thickness of a steel plate, the structure of lamellar pearlite, granular pearlite and a very small amount of ferrite, and the saw blade matrix is excellent in matching of hardness and plasticity and beneficial to processing. The unevenness of the steel strip is less than or equal to 5mm/m after being flattened by a high-strength flattening machine set, the hardness of the saw blade matrix blank processed by the steel plate can reach more than 47HRC after heat treatment, the tensile strength reaches more than 1350MPa, the elongation reaches more than 12%, the thermal stability is excellent, the thickness range of the product is 3-16 mm, the width range is 2000mm at most, and the requirements of different purposes of mining can be met.
Detailed Description
The present invention is further illustrated by the following examples.
According to the embodiment of the invention, smelting, continuous casting, heating, rolling, cooling and heat treatment are carried out according to the component proportion of the technical scheme. The compositions of the steels of the examples of the invention are shown in table 1. The main process parameters of the steel of the embodiment of the invention are shown in Table 2. The properties of the steels of the examples of the invention are shown in Table 3. The heat treatment process and performance results of the steels of the examples of the invention are shown in Table 4.
TABLE 1 composition (wt%) of steels of examples of the present invention
| Numbering | C | Si | Mn | P | S | Cr | V |
| Example 1 | 0.48 | 0.23 | 1.49 | 0.018 | 0.003 | 0.26 | 0.11 |
| Example 2 | 0.54 | 0.3 | 1.38 | 0.015 | 0.007 | 0.22 | 0.13 |
| Example 3 | 0.5 | 0.21 | 1.21 | 0.013 | 0.008 | 0.28 | 0.1 |
| Example 4 | 0.57 | 0.32 | 1.32 | 0.014 | 0.004 | 0.26 | 0.06 |
| Example 5 | 0.51 | 0.35 | 1.5 | 0.015 | 0.002 | 0.17 | 0.14 |
| Example 6 | 0.53 | 0.27 | 1.26 | 0.017 | 0.005 | 0.29 | 0.12 |
| Example 7 | 0.55 | 0.33 | 1.43 | 0.013 | 0.003 | 0.19 | 0.08 |
| Example 8 | 0.53 | 0.2 | 1.25 | 0.012 | 0.007 | 0.25 | 0.13 |
TABLE 2 Main Process parameters of the steels of the examples of the invention
TABLE 3 Properties of steels of examples of the invention
| Numbering | Thickness mm | Tensile strength MPA of steel belt | Elongation percentage A% | Hardness of steel strip HRC | Depth of decarburized layer% | Unevenness mm/m of steel plate |
| Example 1 | 3 | 780 | 18 | 15 | 0.8 | 3 |
| Example 2 | 5 | 803 | 19 | 17 | 1 | 4 |
| Example 3 | 6 | 825 | 21 | 16 | 0.9 | 5 |
| Example 4 | 8 | 856 | 20 | 15 | 1.2 | 4 |
| Example 5 | 10 | 804 | 23 | 15 | 1.5 | 2 |
| Example 6 | 12 | 879 | 19 | 16 | 1.3 | 2 |
| Example 7 | 14 | 847 | 20 | 15 | 1.7 | 3 |
| Example 8 | 16 | 821 | 20 | 16 | 1.9 | 3 |
TABLE 4 Heat treatment Process and Performance results for steels of examples of the invention
| Numbering | Heating temperature of | Holding time min | Quenching medium temperature DEG C | Tempering temperature DEG C | Holding time min | Hardness HRC | Elongation percentage A% |
| Example 1 | 785 | 6 | 45 | 151 | 5 | 48 | 13 |
| Example 2 | 792 | 7 | 40 | 170 | 5 | 49 | 12 |
| Example 3 | 825 | 7 | 43 | 218 | 6 | 50 | 14 |
| Example 4 | 840 | 8 | 54 | 245 | 6 | 50 | 13 |
| Example 5 | 857 | 10 | 47 | 270 | 10 | 49 | 12 |
| Example 6 | 860 | 12 | 68 | 292 | 11 | 52 | 13 |
| Example 7 | 873 | 13 | 62 | 330 | 12 | 51 | 14 |
| Example 8 | 880 | 15 | 60 | 349 | 16 | 51 | 12 |
In order to express the present invention, the above embodiments are properly and fully described by way of examples, and the above embodiments are only used for illustrating the present invention and not for limiting the present invention, and those skilled in the relevant art can make various changes and modifications without departing from the spirit and scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made by the persons skilled in the relevant art should be included in the protection scope of the present invention, and the protection scope of the present invention should be defined by the claims.
Claims (3)
1. A hot-rolled steel strip for a diamond saw blade substrate is characterized by comprising the following components in percentage by weight: c: 0.48% -0.57%, Si: 0.20-0.36%, Mn: 1.21% -1.50%, V: 0.06% -0.14%, Cr: 0.16 to 0.29 percent of the total Fe content, less than or equal to 0.020 percent of impurity element P, less than or equal to 0.009 percent of S, and the balance of Fe and inevitable impurities.
2. A method of manufacturing a hot rolled steel strip for a diamond saw blade substrate according to claim 1, comprising the steps of smelting, continuous casting, heating, rolling, cooling; the method is characterized in that:
(1) smelting and continuous casting:
after the qualified molten steel smelted by the converter is processed by LF and calcium, a billet is continuously cast by a continuous casting machine, and electromagnetic stirring and soft reduction are carried out in the continuous casting process; the thickness of the continuous casting billet is 135 mm-300 mm, and the charging temperature of the casting billet is required to be more than 500 ℃;
(2) heating:
heating the continuous casting blank at 1165-1205 ℃, preserving heat for 1.5-4 hours, burning steel in a neutral or weak reducing atmosphere, and controlling the air-fuel ratio within the range of (1.7-2.0): 1;
(3) rolling: the initial rolling temperature of finish rolling is 1070-1120 ℃, and the final rolling temperature is controlled at 905-950 ℃;
(4) and (3) cooling: laminar cooling is adopted: cooling to 700-750 ℃ in an intermittent sparse cooling mode between the separators for coiling; and slowly cooling the steel plate by a slow cooling cover after coiling, wherein the slow cooling speed is not more than 10 ℃/h.
3. The method for manufacturing a hot-rolled steel strip for a diamond saw blade substrate according to claim 2, comprising the steps of smelting, continuous casting, heating, rolling, cooling; the method is characterized in that: the method also comprises heat treatment, and the heat treatment process comprises the following steps:
quenching and tempering; heating the steel plate to 785-880 ℃, preserving heat for 5-20 min, quenching, wherein the quenching medium is cooling oil with the temperature of less than or equal to 80 ℃, then tempering at 150-350 ℃, and preserving heat.
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| CN113088813A (en) * | 2021-03-24 | 2021-07-09 | 武汉钢铁有限公司 | Steel for hot-rolled saw blade and production method thereof |
| CN113528981A (en) * | 2021-06-18 | 2021-10-22 | 首钢集团有限公司 | 2000 MPa-level steel plate for protection and preparation method thereof |
| CN115595501A (en) * | 2022-09-26 | 2023-01-13 | 首钢集团有限公司（Cn） | CrNiMo alloy strip steel and preparation method thereof |
| CN116024490A (en) * | 2021-10-25 | 2023-04-28 | 宝山钢铁股份有限公司 | Medium-carbon pre-hardened saw blade steel and manufacturing method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1904119A (en) * | 2005-07-29 | 2007-01-31 | 宝山钢铁股份有限公司 | Stone material cutting saw blade steel and its manufacturing method |
| CN102134681A (en) * | 2010-01-22 | 2011-07-27 | 宝山钢铁股份有限公司 | Steel for saw blade substrate and manufacturing method thereof |
| CN102345074A (en) * | 2011-10-19 | 2012-02-08 | 武汉钢铁(集团)公司 | Intermediate-carbon high-speed cutting saw blade matrix steel and production method thereof |
| CN103173685A (en) * | 2013-01-07 | 2013-06-26 | 宝钢集团新疆八一钢铁有限公司 | Production method of high-strength saw bit steel coil |
| CN104532150B (en) * | 2014-12-19 | 2017-02-22 | 宝山钢铁股份有限公司 | Economical and ultra-wide saw steel and preparation method thereof |
| CN107779577A (en) * | 2016-08-26 | 2018-03-09 | 鞍钢股份有限公司 | A kind of excellent garden tool set steel of processing characteristics and its production method |
| CN109628840A (en) * | 2019-02-12 | 2019-04-16 | 鞍钢股份有限公司 | A kind of 550MPa grades of cold rolling is anti-corrosion dual phase steel and its manufacturing method |
-
2019
- 2019-09-30 CN CN201910942492.9A patent/CN110777295B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1904119A (en) * | 2005-07-29 | 2007-01-31 | 宝山钢铁股份有限公司 | Stone material cutting saw blade steel and its manufacturing method |
| CN102134681A (en) * | 2010-01-22 | 2011-07-27 | 宝山钢铁股份有限公司 | Steel for saw blade substrate and manufacturing method thereof |
| CN102345074A (en) * | 2011-10-19 | 2012-02-08 | 武汉钢铁(集团)公司 | Intermediate-carbon high-speed cutting saw blade matrix steel and production method thereof |
| CN103173685A (en) * | 2013-01-07 | 2013-06-26 | 宝钢集团新疆八一钢铁有限公司 | Production method of high-strength saw bit steel coil |
| CN104532150B (en) * | 2014-12-19 | 2017-02-22 | 宝山钢铁股份有限公司 | Economical and ultra-wide saw steel and preparation method thereof |
| CN107779577A (en) * | 2016-08-26 | 2018-03-09 | 鞍钢股份有限公司 | A kind of excellent garden tool set steel of processing characteristics and its production method |
| CN109628840A (en) * | 2019-02-12 | 2019-04-16 | 鞍钢股份有限公司 | A kind of 550MPa grades of cold rolling is anti-corrosion dual phase steel and its manufacturing method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112171215A (en) * | 2020-09-30 | 2021-01-05 | 唐山冶金锯片有限公司 | Environment-friendly preparation method of medium and small-diameter diamond circular saw blade matrix |
| CN113088813A (en) * | 2021-03-24 | 2021-07-09 | 武汉钢铁有限公司 | Steel for hot-rolled saw blade and production method thereof |
| CN113528981A (en) * | 2021-06-18 | 2021-10-22 | 首钢集团有限公司 | 2000 MPa-level steel plate for protection and preparation method thereof |
| CN113528981B (en) * | 2021-06-18 | 2022-04-19 | 首钢集团有限公司 | 2000 MPa-level steel plate for protection and preparation method thereof |
| CN116024490A (en) * | 2021-10-25 | 2023-04-28 | 宝山钢铁股份有限公司 | Medium-carbon pre-hardened saw blade steel and manufacturing method thereof |
| CN115595501A (en) * | 2022-09-26 | 2023-01-13 | 首钢集团有限公司（Cn） | CrNiMo alloy strip steel and preparation method thereof |
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