CN110586672A - Stelmor cooling method for improving sorbitizing rate of 82B steel wire rod - Google Patents
Stelmor cooling method for improving sorbitizing rate of 82B steel wire rod Download PDFInfo
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- CN110586672A CN110586672A CN201910993672.XA CN201910993672A CN110586672A CN 110586672 A CN110586672 A CN 110586672A CN 201910993672 A CN201910993672 A CN 201910993672A CN 110586672 A CN110586672 A CN 110586672A
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- wire rod
- steel wire
- temperature
- stelmor
- cooling method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
Abstract
The invention discloses a stelmor cooling method for improving the sorbite rate of an 82B steel wire rod, which relates to the technical field of metallurgical industry and is characterized in that the spinning temperature is 930 +/-10 ℃, the cooling speed of the wire rod is controlled by controlling the air volume of a 0-13# fan, so that the temperature of a lap joint point is 640 +/-10 ℃ when the wire rod enters a 5# fan area, and the temperature of the lap joint point is 610 +/-10 ℃ when the wire rod enters a 7# fan area, and the temperatures of the lap joint point and a non-lap joint point are 560 ~ 660 ℃ when the wire rod is in the 5-13# fan area.
Description
Technical Field
The invention relates to the technical field of metallurgical industry, in particular to a stelmor cooling method for improving the sorbite rate of an 82B steel wire rod.
Background
The SWRH82B steel wire rod is one of materials commonly applied to important projects such as highways, railways, high-rise buildings, bridges, water conservancy facilities and the like, has good toughness, strength and drawing performance, and can be made into workpieces such as high-prestress steel wires, high-strength steel wire ropes, high-strength low-relaxation prestress steel strands and the like after deep processing. The SWRH82B steel wire rod needs to be drawn in multiple times during the processing, which requires that the metallographic structure of the raw material of the steel wire rod is a sorbite structure with good drawing performance.
The traditional method for improving the sorbitizing rate of domestic and foreign iron and steel enterprises is to carry out isothermal quenching treatment on the steel wire rod in the temperature range of transformation from austenite to sorbite in the steel wire rod, so that the transformation rate of the sorbite in the steel wire rod can be improved, but the production cost is greatly increased. At present, advanced stelmor air cooling lines are mainly adopted for cooling after rolling of high-speed wire rod production lines in China, and the high cooling speed is required to be adopted before phase change of wire rods, so that precipitation of co-precipitation phases is inhibited by forced air cooling, and simultaneously a sorbite structure is formed in a low phase change temperature region, so that the stelmor air cooling line is a key step for determining the final performance of the wire rods in terms of controlled cooling of the wire rods. However, the sorbitizing rate of the wire rod produced by domestic iron and steel enterprises still has a certain gap relative to other countries such as Japan.
To this end, we provide a stelmor cooling method that helps to increase the sorbing rate of the SWRH82B steel wire rod.
Disclosure of Invention
The invention provides a stelmor cooling method for improving the sorbitizing rate of an 82B steel wire rod, and mainly aims to solve the problems.
The invention adopts the following technical scheme:
a stelmor cooling method for improving sorbite rate of 82B steel wire rods is characterized in that spinning temperature is 930 +/-10 ℃, cooling speed of the wire rods is controlled by controlling air quantity of a 0-13# fan, so that when the wire rods enter a 5# fan area, temperature at a lap joint point is 640 +/-10 ℃, and when the wire rods enter a 7# fan area, temperature at the lap joint point is 610 +/-10 ℃, and the temperature at the lap joint point and a non-lap joint point is guaranteed to be 560 ~ 660 ℃ when the wire rods are in the 5-13# fan area.
Further, the temperature of the wire rod in the 5-13# fan area is 560 ~ 610 ℃ at the non-lap point, and the temperature at the lap point is controlled to be 560 ~ 660 ℃.
Furthermore, rated air quantity adopted by the fans of No. 1-3 and No. 8 is not less than 2.4 multiplied by 105 m3Model of/h.
Furthermore, rated air quantity adopted by fans of 4-7# and 9-10 # is not less than 1.8 multiplied by 105 m3Model of/h.
Furthermore, rated air quantity adopted by 0# and 11-13# fans is not lower than 1.0 multiplied by 105 m3Model of/h.
Furthermore, for the wire rod with the diameter of more than or equal to 12.5 mm, when the room temperature is higher than 30 ℃, the air quantity of the No. 1-9 fan is not lower than 1.8 multiplied by 105 m3/h。
Furthermore, for diameters ≥ 12.5 mmThe air quantity of the 1-3# and 8# fans is not less than 2.4 multiplied by 10 when the room temperature is higher than 30 DEG C5 m3/h。
Furthermore, the speed of the roller way on the stelmor air cooling line is 0.8-1.0 m/s.
Further, the distance between two adjacent fans on the stelmor air cooling line is 3 m.
Compared with the prior art, the invention has the beneficial effects that:
the invention carries out accurate optimization and coordination control on the cooling process of the stelmor air cooling line, greatly improves the sorbitizing rate of the 82B steel wire rod under the condition of not increasing any facility, effectively improves the comprehensive mechanical property of the wire rod, and has good economy and popularization.
Drawings
FIG. 1 is a schematic view of a stelmor air cooling line according to the present invention.
FIG. 2 is a scanning electron micrograph of a final product according to an embodiment of the present invention.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings. Numerous details are set forth below in order to provide a thorough understanding of the present invention, but it will be apparent to those skilled in the art that the present invention may be practiced without these details.
Referring to fig. 1, a stelmor cooling method for improving the sorbite rate of an 82B steel wire rod is mainly characterized in that the cooling process is optimally designed by comprehensively considering the influence factors such as the spinning temperature, the air volume of each fan, the opening number of the fans, the room temperature, the roller speed, the wire specification and the like, and a precise coordination control method is adopted to ensure that the wire rod is firstly quickly cooled to a sorbite phase change region on a stelmor air cooling line, then is slowly cooled to the end of phase change, and the time of the wire rod in the sorbite phase change region is prolonged as far as possible, so that the wire rod obtains a sorbite structure with high proportion. Meanwhile, the temperature of the lap joint point and the temperature of the non-lap joint point are accurately controlled, so that the tissue uniformity and the strength uniformity of the wire rod are fully ensured.
Referring to fig. 1, the method firstly determines the optimal sorbite rate phase-change temperature and time according to a CCT curve, then adjusts the air cooling process, considers the core cooling speed and the phase-change temperature, adopts an air cooling calculation model, and accurately controls the air cooling process in a cooling section, and specifically comprises the following processes:
(1) the spinning temperature of the spinning machine 1 is 930 +/-10 ℃, and the speed of the roller table 2 is 0.8-1.0 m/s;
(2) 14 fans are arranged on a stelmor air cooling line, the fans are numbered as 0#, 1#, … … and 13# in sequence, the distance between every two fans is 3m, the cooling speed of the wire rod is controlled by controlling the air volume of 0-13#, so that when the wire rod enters a 5# fan area, the temperature of an overlap point a is 640 +/-10 ℃, when the wire rod enters a 7# fan area, the temperature of the overlap point a is 610 +/-10 ℃, and the temperature of a non-overlap point b is 560 ~ ℃ and the temperature of the overlap point a is 560 ~ ℃ when the wire rod enters a 5-13# fan area.
Referring to fig. 1, according to the process requirements of the stelmor cooling line and the cooling speed of the wire rod at each stage, a suitable model of a No. 0-13 fan is selected to ensure that the 82B steel wire rod with any specification can obtain a high sorbing rate on the stelmor cooling line. After trial and error we have obtained an optimal set of combination schemes: rated air quantity adopted by 1-3# and 8# fans is not less than 2.4 multiplied by 105 m3The model of the blower is characterized in that rated air quantity adopted by 4-7# and 9-10 # blowers is not less than 1.8 multiplied by 105 m3The model of the blower is characterized in that 0# and 11-13# blowers adopt rated air quantity not less than 1.0 multiplied by 105 m3Model of/h.
Referring to fig. 1, the larger the diameter of the disc body is, the slower the cooling speed is, and the higher the requirement on the air volume of the fan is, and repeated experiments show that for the wire rod with the diameter being more than or equal to 12.5 mm, when the room temperature is higher than 30 ℃, the air volume of the 1-3# and 8# fans should not be lower than 2.4 x 105 m3The air volume of the blower of the No. 4-7 or No. 9 is not less than 1.8 multiplied by 105 m3/h。
Referring to fig. 1, except fans # 0 and # 8, the purpose of gradually reducing the air volume requirement of each fan is closely related to the process requirement on a stelmor cooling line, and a higher cooling speed is adopted before the phase change of a wire rod to inhibit the precipitation of a co-precipitation phase by forced air cooling; the air volume of the fan is small when the phase change starts, so that the cooling speed is reduced, and the wire rod is favorable for forming a sorbite structure in an isothermal zone, thereby obtaining the effect similar to lead bath quenching. The reason that the air quantity at the No. 8 fan is large is that the wire rod can generate phase change latent heat in the phase change process, so that the phase change latent heat can be effectively counteracted by adopting large air quantity at the stage, the phase change process is ensured to be in an isothermal interval, and the sorbitizing rate is effectively ensured; the air volume of the No. 0 fan is designed to be smaller because the fan is positioned in a falling section after spinning, on one hand, the space is limited, and a large-size fan cannot be installed, and on the other hand, in the spinning falling section, the small-air-volume fan can effectively ensure the spinning and looping quality.
Referring to fig. 1, after the cloth ring of the laying head falls on the air cooling line, the wire rod forms mutually overlapped loose coils, so that the heat of the wire rod at the overlapping point a and the non-overlapping point b is unevenly distributed, and the cooling speed is inconsistent. If the mechanical properties of the lap joint point a and the non-lap joint point b are required to be consistent, the temperature difference between the lap joint point a and the non-lap joint point b must be reduced as much as possible, so that the temperature of the lap joint point a and the temperature of the non-lap joint point b are accurately controlled by controlling the air volume of each fan, and the tissue uniformity and the strength uniformity of the wire rod are ensured.
Referring to fig. 1 and 2, to describe the cooling control method in more detail, the specific cooling process on the stelmor air cooling line is described below by taking an 8mm diameter specification SWRH82B steel wire rod as an example:
(1) the spinning temperature of the spinning machine 1 is 930 ℃, the speed of the roller table 2 is 0.8m/s, the rolling speed is 100m/s, and the room temperature is 33 ℃;
(2) the 14 fans are numbered as 0#, 1#, … # and 13# in sequence, the space between every two fans is set to be 3m, and the air quantity adopted by the fans of 1-3# and 8# is 2.4 multiplied by 105m3The model of the blower is 1.8 multiplied by 10, 4 to 7# and 9 to 10 # of the blower adopt the air quantity5 m3The model of the machine is h, and the air volume adopted by the 0# fan and the 11-13# fan is 1.0 multiplied by 105 m3Model of/h;
(3) the air quantity of the 0-7# fan is accurately controlled to be 100% of rated air quantity in the cooling process (namely the air quantity of the 0# fan is 1.0 multiplied by 10)5 m3Wind of the No. 1-3/h fanThe amount is 2.4X 105 m3The air quantity of the No. 4-7 blower is 1.8 multiplied by 105 m3H), the air volume of the 8# fan is 50% of the rated air volume (namely, the air volume of the 8# fan is 1.2 multiplied by 10)5 m3H), the air volume of the No. 9 fan is 75 percent of the rated air volume (namely the air volume of the No. 9 fan is 1.35 multiplied by 10)5 m3H), turning off the No. 10-13 fan;
(4) the temperature of the SWRH82B steel wire rod at the non-lap point b was 564 ℃ and the temperature at the lap point a was 592 ℃ as measured on site on exiting the 13# blower.
Mechanical property detection of the SWRH82B steel wire rod with the diameter of 8mm produced by the process shows that the sorbite rate is 93 percent, the tensile strength reaches 1197 ~ 1276 MPa, and the face shrinkage rate reaches 35 percent, and analysis according to a scanning electron micrograph (shown in figure 2) shows that the SWRH82B steel wire rod sorbite has small lamella spacing and uniform structure.
The above-mentioned embodiment is only a typical example of a plurality of tests, and does not limit the scope of the present invention in any way. After repeated tests and comprehensive analysis, the sorbite rate of the SWRH82B steel wire rod at the lap joint point and the non-lap joint point is more than or equal to 93 percent, the tensile strength is more than or equal to 1100 MPa, the surface shrinkage rate is more than or equal to 25 percent, and the wire rod has uniform structure, uniform strength, good toughness and good plasticity after being treated by the method under the condition of not increasing any facilities.
The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.
Claims (9)
1. A stelmor cooling method for improving sorbite rate of 82B steel wire rods is characterized in that spinning temperature is 930 +/-10 ℃, cooling speed of the wire rods is controlled by controlling air quantity of 0-13# fans, so that when the wire rods enter a 5# fan area, temperature of a lap joint point is 640 +/-10 ℃, and when the wire rods enter a 7# fan area, temperature of the lap joint point is 610 +/-10 ℃, and temperature of the lap joint point and temperature of a non-lap joint point are 560 ~ 660 ℃ when the wire rods are in the 5-13# fan area.
2. The stelmor cooling method for improving the sorbitizing rate of the 82B steel wire rod is characterized in that the temperature of the non-lap point of the wire rod is 560 ~ 610 ℃ in the 5-13# fan area, and the temperature of the lap point is controlled to be 560 ~ 660 ℃.
3. The stelmor cooling method for increasing the sorbitizing rate of an 82B steel wire rod as claimed in claim 1, wherein: rated air quantity adopted by 1-3# and 8# fans is not less than 2.4 multiplied by 105 m3Model of/h.
4. The stelmor cooling method for increasing the sorbitizing rate of an 82B steel wire rod as claimed in claim 1, wherein: rated air quantity adopted by 4-7# and 9-10 # fans is not less than 1.8 multiplied by 105 m3Model of/h.
5. The stelmor cooling method for increasing the sorbitizing rate of an 82B steel wire rod as claimed in claim 1, wherein: rated air quantity adopted by 0# and 11-13# fans is not less than 1.0 multiplied by 105 m3Model of/h.
6. The stelmor cooling method for increasing the sorbitizing rate of an 82B steel wire rod as claimed in claim 1, wherein: for the wire rod with the diameter of more than or equal to 12.5 mm, when the room temperature is higher than 30 ℃, the air quantity of the No. 1-9 fan is not lower than 1.8 multiplied by 105 m3/h。
7. The stelmor cooling method for increasing the sorbitizing rate of an 82B steel wire rod as claimed in claim 6, wherein: for wire rod with diameter greater than or equal to 12.5 mm, when the room temperature is higher than 30 deg.C, the air quantity of 1-3# and 8# fans is not less than 2.4X 105m3/h。
8. The stelmor cooling method for increasing the sorbitizing rate of an 82B steel wire rod as claimed in claim 1, wherein: the speed of the roller way on the stelmor air cooling line is 0.8-1.0 m/s.
9. The stelmor cooling method for increasing the sorbitizing rate of an 82B steel wire rod as claimed in claim 1, wherein: the distance between two adjacent fans on the stelmor air cooling line is 3 m.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111893279A (en) * | 2020-08-12 | 2020-11-06 | 宝武集团鄂城钢铁有限公司 | Stelmor air-cooled wire-controlled cold production method of HRB400(E) deformed steel bar with yield strength of more than or equal to 420MPa |
| CN111940501A (en) * | 2020-08-12 | 2020-11-17 | 青岛特殊钢铁有限公司 | High-speed wire production method for controlling mechanical property fluctuation of high-carbon steel wire rod in same circle |
| CN112157121A (en) * | 2020-09-25 | 2021-01-01 | 攀钢集团研究院有限公司 | Preparation method of 30MnSi hot-rolled wire rod |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61115611A (en) * | 1984-11-07 | 1986-06-03 | Toshiba Corp | Steel stock cooling control device |
| CN1778486A (en) * | 2004-11-17 | 2006-05-31 | 首钢总公司 | After-roll reinforced cooling process for 82B wire rod steel strand |
| CN101831591A (en) * | 2010-04-21 | 2010-09-15 | 首钢水城钢铁（集团）有限责任公司 | High-strength wire rod for steel stranded wire and production method thereof |
| CN104651724A (en) * | 2015-02-11 | 2015-05-27 | 宣化钢铁集团有限责任公司 | Coil rod for pre-stressed steel strand and production method of coil rod |
| CN106734261A (en) * | 2016-12-12 | 2017-05-31 | 中天钢铁集团有限公司 | A kind of cold technique of Stanermo wind-cooling linear control for improving spring steel 55SiCrA wire rods tissue and performance |
| CN110218951A (en) * | 2019-06-11 | 2019-09-10 | 首钢水城钢铁（集团）有限责任公司 | A kind of φ 14mm major diameter mining steel wire rods for steel strands production method |
-
2019
- 2019-10-18 CN CN201910993672.XA patent/CN110586672B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61115611A (en) * | 1984-11-07 | 1986-06-03 | Toshiba Corp | Steel stock cooling control device |
| CN1778486A (en) * | 2004-11-17 | 2006-05-31 | 首钢总公司 | After-roll reinforced cooling process for 82B wire rod steel strand |
| CN101831591A (en) * | 2010-04-21 | 2010-09-15 | 首钢水城钢铁（集团）有限责任公司 | High-strength wire rod for steel stranded wire and production method thereof |
| CN104651724A (en) * | 2015-02-11 | 2015-05-27 | 宣化钢铁集团有限责任公司 | Coil rod for pre-stressed steel strand and production method of coil rod |
| CN106734261A (en) * | 2016-12-12 | 2017-05-31 | 中天钢铁集团有限公司 | A kind of cold technique of Stanermo wind-cooling linear control for improving spring steel 55SiCrA wire rods tissue and performance |
| CN110218951A (en) * | 2019-06-11 | 2019-09-10 | 首钢水城钢铁（集团）有限责任公司 | A kind of φ 14mm major diameter mining steel wire rods for steel strands production method |
Non-Patent Citations (2)
| Title |
|---|
| 曲广煦: "SWRH82B线材工艺分析 ", 《冶金丛刊》 * |
| 李长胜等: "高碳82B线材控轧控冷工艺优化实践", 《山东冶金》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111893279A (en) * | 2020-08-12 | 2020-11-06 | 宝武集团鄂城钢铁有限公司 | Stelmor air-cooled wire-controlled cold production method of HRB400(E) deformed steel bar with yield strength of more than or equal to 420MPa |
| CN111940501A (en) * | 2020-08-12 | 2020-11-17 | 青岛特殊钢铁有限公司 | High-speed wire production method for controlling mechanical property fluctuation of high-carbon steel wire rod in same circle |
| CN112157121A (en) * | 2020-09-25 | 2021-01-01 | 攀钢集团研究院有限公司 | Preparation method of 30MnSi hot-rolled wire rod |
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