CN115679060A - Ultrathin marble frame saw blade substrate with thickness of 1.2mm and production method thereof - Google Patents
Ultrathin marble frame saw blade substrate with thickness of 1.2mm and production method thereof Download PDFInfo
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- CN115679060A CN115679060A CN202211356555.0A CN202211356555A CN115679060A CN 115679060 A CN115679060 A CN 115679060A CN 202211356555 A CN202211356555 A CN 202211356555A CN 115679060 A CN115679060 A CN 115679060A
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Abstract
The invention relates to a production method of an ultrathin marble frame saw blade substrate with the thickness of 1.2mm, which comprises the following steps: (1) cold rolling and annealing: heating the strip steel to 725-735 ℃, preserving heat for 35-40h for annealing, cooling after annealing and cold rolling; (2) graded heat treatment: heating to 865-875 ℃, and keeping the temperature for 5-7min; rapidly cooling to 220-270 deg.C within 5-7s, maintaining the temperature for 2-5min at maximum cooling speed of 160-170 deg.C/s, and slowly cooling to room temperature; heating to 500-520 deg.C, maintaining the temperature for 4-5min, tempering, and rapidly cooling to room temperature; (3) And grinding and polishing the edges of the strip steel, and rolling to obtain a finished product of the saw blade matrix. The thickness of the saw blade matrix prepared by the production method reaches 1.2mm, and the hardness, tensile strength, yield strength, elongation and impact resistance are obviously improved.
Description
Technical Field
The invention relates to the technical field of saw blade matrix production, in particular to a 1.2 mm-thick ultrathin marble frame saw blade matrix and a production method thereof.
Background
The marble plate is widely favored by consumers because of having natural and beautiful textures, and is mainly and widely used for walls, cylindrical surfaces, floors, window boards, service desks and the like of public building projects such as squares, libraries, supermarkets, airports, cinemas, hotels and the like; the current market has three ways for processing marble plates, namely cutting by a diamond circular saw, a diamond frame saw blade and a diamond rope saw; the diamond circular saw has the advantages of wide processing range, high processing efficiency, simple operation, small investment and the like, but the processing size of the diamond circular saw is limited, the processing size of the diamond circular saw can only reach 30-35% of the diameter of the circular disc, the larger the diameter is, the thicker the corresponding thickness is, the larger the saw machine is, the processing technology of the diamond circular saw blade with the diameter of more than 2200mm is complex, the precision is difficult to control, and the yield is low; secondly, the diamond wire saw is used for processing the stone, so that the processing of a large marble plate is met, but the wire saw technology at home and abroad is not completely mature, the multi-wire tensioning and positioning structure is complex, the rigidity and the service life are low, the price is high, the diameter of the stone string bead is about 12mm, the diameter of the minimum Dan Chuanzhu manufactured by manufacturers and research institutes can be controlled to be about 6mm, the saw kerf is wide during processing, and the application of the diamond wire saw on the granite large plate is limited to a certain extent; finally, the diamond frame saw blade is combined with the two processing modes, the diamond frame saw blade is not influenced by the outer diameter, has the advantages of thin thickness and the like, the general thickness is between 1.8 and 3.5mm, the loading amount can reach between 25 and 150, the cutting seam is narrow, the yield is high, the quantity of plates processed at one time is large, the processing breadth is not limited, the processing efficiency and the quality are high, and the workload of subsequent grinding and polishing is reduced, so that the diamond frame saw blade is widely applied to the marble cutting industry, and according to preliminary statistics, the frame saw blade has the quantity of about 4500 in places such as Fujian Yunfao, fujian Quanzhou, jiangsu, chongqing, shanghai, beijing, hubei and the like in China, and is applied to artificial marble, natural marble, soft (low-hardness) granite, artificial granite and the like at present, relatively mature.
The minimum thickness that can accomplish 1.8mm of frame saw blade base member on the market at present, because saw blade base member thickness is less, the outturn rate of panel is higher, and to the cutting of high-end stone material, with the cutting of thinner frame saw blade base member, economic benefits is higher. With the increasing price and production cost of stone raw materials to be processed, the thickness of 1.8mm cannot meet the requirement, a thinner frame saw blade base body is urgently needed, but the rigidity and impact resistance of the thinned frame saw blade base body cannot meet the requirement, and the frame saw blade base body with smaller thickness cannot be produced by the conventional production method at present.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an ultrathin marble frame saw blade substrate with the thickness of 1.2mm and a production method thereof.
In a first aspect of the invention, a method for producing an ultrathin marble frame saw blade substrate with the thickness of 1.2mm is provided, which comprises the following steps:
(1) Cold rolling and annealing: heating the strip steel to 725-735 ℃, preserving heat for 35-40h for annealing, cooling after annealing and cold rolling; the strip steel comprises the following chemical components in percentage by weight: 0.6 to 0.8 percent of carbon, 0.4 to 0.8 percent of silicon, 0.5 to 0.9 percent of manganese, 2 to 5 percent of chromium, 0.3 to 0.9 percent of nickel and the balance of iron;
(2) Grading heat treatment: heating to 865-875 ℃, and keeping the temperature for 5-7min; rapidly cooling to 220-270 deg.C within 5-7s, maintaining the temperature for 2-5min at maximum cooling speed of 160-170 deg.C/s, and slowly cooling to room temperature; heating to 500-520 deg.C, maintaining the temperature for 4-5min, tempering, and rapidly cooling to room temperature;
(3) And grinding and polishing the edges of the strip steel, and rolling to obtain a finished product of the saw blade matrix.
The carbon content is mainly controlled to control the material to have higher hardness, and secondly, the hardness of the saw blade is 42-44HRC, and the tensile strength is more than 1350 MPa. Chromium: the hardenability is increased, and the grains are controlled to be fine; nickel: the hardenability is increased, the fineness of crystal grains is controlled, the high-hardness impact resistance is increased, and the antirust effect is improved. The control of each raw material element is cooperated together to ensure that the saw blade base material has higher hardness and higher impact resistance.
In the graded heat treatment, the heating temperature and the heating time supplement each other, after the material is heated, the material is kept warm for a certain time to achieve complete austenitization, carbide is dissolved in austenite, and the grain size is controlled to be larger than 7 and above; if the heating temperature is higher, the crystal grains are coarse, and the material is enlarged; the heating temperature is lower, which can cause incomplete austenitization, cause insufficient dissolution of carbide and cause that the mechanical property does not reach the standard.
Quenching the workpiece in low-temperature quenching liquid, wherein the temperature of the quenching liquid is near the Ms point, the workpiece stays at the temperature for 2-5min, then air cooling is carried out, and a graded cooling mode is adopted, so that the inner temperature and the outer temperature of the workpiece are relatively uniform, and simultaneously martensite transformation is carried out, thereby greatly reducing the quenching stress and preventing deformation and cracking.
Tempering is a heat treatment process in which a workpiece is hardened, heated to a temperature not higher than Ac1 (a temperature at which pearlite starts to transform into austenite during heating), held for a certain period of time, and then cooled to room temperature. Tempering is carried out immediately after quenching, with the aim of: eliminating residual stress generated during workpiece quenching, and preventing deformation and cracking; the hardness, strength, plasticity and toughness of the workpiece are adjusted to meet the requirement of service performance; the structure and the size are stabilized, and the precision is ensured; improve and enhance the processing property. Tempering is therefore the last important step in obtaining the desired properties of the workpiece. The product obtains better mechanical property through the matching of quenching and tempering. The quenching after tempering is to avoid high-temperature tempering brittleness and ensure the toughness of the material.
Preferably, in the step (1), the annealing is performed by using an all-hydrogen hood-type annealing furnace.
Preferably, in the step (1), annealing is carried out, and then natural slow cooling is carried out for 22-24h for cold rolling.
Preferably, in the step (1), the cold rolling is carried out for 3 to 4 times to obtain the steel plate with the thickness of 1.22 to 1.25mm, and the reduction ratio is 50 to 60 percent.
Preferably, in the step (1), the first reduction ratio is 35% in the cold rolling.
Preferably, in the step (2), the quenching is carried out by cooling through quenching liquid at 220-270 ℃.
Preferably, in the step (2), the slow cooling is carried out by blowing air to the room temperature in air through a fan for 5-15 min.
Preferably, in the step (2), the rapid cooling time for tempering is 4-5min. And blowing nitrogen by adopting a powerful fan to carry out rapid cooling.
In a second aspect of the invention, a saw blade substrate prepared by the above production method is provided.
In a third aspect of the invention, there is provided the use of the saw blade substrate described above for cutting marble and diamond.
The invention has the beneficial effects that:
1. according to the invention, by reasonably controlling the chemical components and the content of each component of the strip steel and controlling each parameter of cold rolling annealing and grading heat treatment in a matching manner, the thickness of the prepared saw blade substrate is reduced, and each performance index of the saw blade substrate is obviously improved.
2. The thickness of the saw blade matrix prepared by the production method reaches 1.2mm, and the hardness, tensile strength, yield strength, elongation and impact resistance are obviously improved.
Drawings
FIG. 1 is a schematic representation of a saw blade substrate made in accordance with example 3 of the present invention;
FIG. 2 is a thickness measurement chart of a saw blade substrate finished product obtained in example 3 of the present invention.
Detailed Description
In order to clearly explain the technical features of the present solution, the present solution is explained by the following detailed description.
Example 1:
a production method of an ultrathin marble frame saw blade substrate with the thickness of 1.2mm comprises the following steps:
(1) Cold rolling and annealing: heating the strip steel to 725 ℃ in an all-hydrogen cover type annealing furnace, preserving heat for 40h for annealing, naturally and slowly cooling for 22h for cold rolling after annealing, and carrying out 3-pass rolling to obtain the strip steel with the thickness of 1.22mm during cold rolling; the strip steel comprises the following chemical components in percentage by weight: 0.6% of carbon, 0.8% of silicon, 0.5% of manganese, 5% of chromium, 0.3% of nickel and the balance of iron;
(2) Grading heat treatment: heating to 865 deg.C, and maintaining the temperature for 7min; rapidly cooling to 270 deg.C within 5s by PAG quenching liquid of 220 deg.C, maintaining for 3min at maximum cooling speed of 160-170 deg.C/s, and slowly cooling to room temperature in 5-15min by blowing air in air; heating to 500 deg.C, maintaining the temperature for 5min, tempering, and rapidly cooling to room temperature;
(3) And grinding and polishing the edges of the strip steel, and rolling to obtain a finished product of the saw blade matrix.
Example 2: a production method of an ultrathin marble frame saw blade substrate with the thickness of 1.2mm comprises the following steps:
(1) Cold rolling and annealing: heating the strip steel to 735 ℃ in an all-hydrogen cover type annealing furnace, preserving heat for 35h for annealing, naturally and slowly cooling for 24h for cold rolling, and performing 3-pass rolling during cold rolling to obtain the strip steel with the thickness of 1.22mm; the strip steel comprises the following chemical components in percentage by weight: 0.8% of carbon, 0.4% of silicon, 0.9% of manganese, 2% of chromium, 0.9% of nickel and the balance of iron;
(2) Grading heat treatment: heating to 875 ℃, and keeping the temperature for 5min; rapidly cooling to 220 deg.C within 7s by PAG quenching liquid of 220 deg.C, maintaining for 5min at maximum cooling speed of 160-170 deg.C/s, and slowly cooling to room temperature in 5-15min by blowing air in air; heating to 520 ℃, keeping the temperature for 4min, tempering, and rapidly cooling to room temperature;
(3) And grinding and polishing the edges of the strip steel, and rolling to obtain a finished product of the saw blade matrix.
Example 3: a production method of an ultrathin marble frame saw blade substrate with the thickness of 1.2mm comprises the following steps:
(1) Cold rolling and annealing: heating the strip steel to 730 ℃ in an all-hydrogen cover type annealing furnace, preserving heat for 38h for annealing, naturally and slowly cooling for 24h for cold rolling, and carrying out 3-pass rolling to obtain the strip steel with the thickness of 1.25mm during cold rolling; the strip steel comprises the following chemical components in percentage by weight: 0.7% of carbon, 0.5% of silicon, 0.7% of manganese, 3% of chromium, 0.6% of nickel and the balance of iron;
(2) Grading heat treatment: heating to 870 deg.C, and maintaining the temperature for 6min; rapidly cooling to 250 deg.C within 6s by PAG quenching liquid of 220 deg.C, maintaining for 5min at maximum cooling speed of 160-170 deg.C/s, and slowly cooling to room temperature in 5-15min by blowing air in air; heating to 510 ℃, keeping the temperature for 5min, tempering, and rapidly cooling to room temperature;
(3) And grinding and polishing the edges of the strip steel, and rolling to obtain a finished product of the saw blade matrix.
The saw blade substrates prepared in examples 1 to 3 had thicknesses of 1.22 to 1.25mm, and the performance indexes were significantly improved even after the thicknesses were decreased.
Table 1 below shows the values of various performance parameters of the saw blade substrates prepared in examples 1-3 of the present invention.
TABLE 1
| Performance parameter | Example 1 | Example 2 | Example 3 |
| Rockwell Hardness (HRC) | 42 | 43 | 43 |
| Tensile strength (MPa) | 1450 | 1465 | 1468 |
| Yield strength (MPa) | 1320 | 1345 | 1350 |
| Elongation (%) | 8.5 | 8.8 | 8.9 |
| Impact resistance (J) | 34 | 33 | 33 |
Of course, the above description is not limited to the above examples, and the undescribed technical features of the present invention may be implemented by or using the prior art, which is not described herein again; the above embodiments and drawings are only for illustrating the technical solutions of the present invention and not for limiting the present invention, and the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that changes, modifications, additions or substitutions within the spirit and scope of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, and shall also fall within the scope of the claims of the present invention.
Claims (7)
1. A production method of an ultrathin marble frame saw blade substrate with the thickness of 1.2mm is characterized by comprising the following steps:
(1) Cold rolling and annealing: heating the strip steel to 725-735 ℃, preserving heat for 35-40h for annealing, cooling after annealing and cold rolling; the strip steel comprises the following chemical components in percentage by weight: 0.6 to 0.8 percent of carbon, 0.4 to 0.8 percent of silicon, 0.5 to 0.9 percent of manganese, 2 to 5 percent of chromium, 0.3 to 0.9 percent of nickel and the balance of iron;
(2) Grading heat treatment: heating to 865-875 ℃, and keeping the temperature for 5-7min; rapidly cooling to 220-270 deg.C within 5s-7s, maintaining the temperature for 2-5min at a maximum cooling rate of 160-170 deg.C/s, and slowly cooling to room temperature; heating to 500-520 deg.C, maintaining the temperature for 4-5min, tempering, and rapidly cooling to room temperature;
(3) And grinding and polishing the edges of the strip steel, and rolling to obtain a finished product of the saw blade matrix.
2. The production method according to claim 1, characterized in that: in the step (1), annealing is carried out by adopting a full-hydrogen hood-type annealing furnace during annealing.
3. The production method according to claim 1, characterized in that: in the step (1), annealing, naturally and slowly cooling for 22-24h, and cold rolling.
4. The production method according to claim 1, characterized in that: in the step (1), the cold rolling is carried out for 3 to 4 times to obtain the steel plate with the thickness of 1.22 to 1.25mm and the compression ratio of 50 to 60 percent.
5. The production method according to claim 1, characterized in that: in the step (2), quenching is carried out by quenching liquid at 220-270 ℃.
6. A saw blade substrate obtained by the production method according to any one of claims 1 to 5.
7. Use of the saw blade substrate of claim 6 for cutting marble.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211356555.0A CN115679060A (en) | 2022-11-01 | 2022-11-01 | Ultrathin marble frame saw blade substrate with thickness of 1.2mm and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211356555.0A CN115679060A (en) | 2022-11-01 | 2022-11-01 | Ultrathin marble frame saw blade substrate with thickness of 1.2mm and production method thereof |
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| CN202211356555.0A Pending CN115679060A (en) | 2022-11-01 | 2022-11-01 | Ultrathin marble frame saw blade substrate with thickness of 1.2mm and production method thereof |
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