CN102240672A - Process for producing high-speed wire rod by adopting grooveless rolling - Google Patents
Process for producing high-speed wire rod by adopting grooveless rolling Download PDFInfo
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Abstract
The invention discloses a process for producing a high-speed wire rod by adopting grooveless rolling. The process mainly comprises heating, the grooveless rolling, prefinish rolling, finish rolling, spinning, controlled cooling and packaging, wherein rolling by virtue of a multi-pass plain barrelled roll is adopted in the grooveless rolling, the inlet and outlet of each rolling machine are respectively provided with a guide, the lengthening coefficient of each pass is controlled to at 1.1-1.4 in a rolling process, and the broadening coefficient of each pass is 0.3-0.4, and the operating speed of a billet in the rolling process is 0.3-5.7m/s. In the invention, deformation parameters of steel material in a production process of an 82B high-speed wire rod are fished out by virtue of practice, the dimensional change of the steel material is effectively controlled, and the off-square problem of the steel material in the traditional grooveless rolling production process is solved, thus the production accident rate is greatly reduced, the product quality is improved and obvious economic benefit is obtained. The 82B high-speed wire rod produced by adopting the process disclosed by the invention meets the YB/T146-1998 standard.
Description
Technical field
The invention belongs to the metal material processing technical field, be specifically related to the technology that a kind of grooveless rolling is produced the high-speed rod wire rod.
Background technology
Roll consumption in the high-speed rod steel rolling mill, power consumption, three indexs of operating rate play a part most critical to cost.The Rolling Production technology of present domestic employing generally is to realize the distortion of steel material by each passage pass, obtains needed size, and this technology can't fundamentally effectively reduce roll consumption, power consumption all the time, improves operating rate.The grooveless rolling production technology is applied on bar production in recent years, and positive effect is played in steel rolling mill's high yield, high-quality, low consumption.But because steel material off-square can't solve, can't be applied to the mill area of big frame spacing, especially during the 82B high-speed rod wire rod in short supply of high-speed rod steel rolling mill production market, because material is a high-carbon steel, deformation system, temperature schedule, the speed system has particularity, in the face of numerous technical barriers, domestic do not have producer to adopt the grooveless rolling production technology to produce 82B high-speed rod wire rod.
Summary of the invention
Technical problem to be solved by this invention is at above-mentioned the deficiencies in the prior art, provide a kind of grooveless rolling to produce the technology of high-speed rod wire rod, this technology does not need special installation, processing cost is low, easily realize suitability for industrialized production, the present invention finds out the deformation parameter (being lengthening coefficient and spread coefficient) of steel material in the 82B high-speed rod wire rod production process by practice, effectively control steel material change in size, the steel material off-square problem that atresia Rolling Production technology before having solved exists, the production accident rate is significantly reduced, product quality is improved, and has tangible economic benefit.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of grooveless rolling is produced the technology of high-speed rod wire rod, it is characterized in that, this technology mainly comprises: heating, grooveless rolling, pre-finish rolling, finish rolling, weave silk, control the cold-peace packing, wherein, grooveless rolling adopts the multi-pass flat rolling; This technology is specific as follows:
(1) heating: the steel billet that adopts walking beam furnace will produce 82B high-speed rod wire rod is heated to 980 ℃～1100 ℃;
(2) grooveless rolling: the mode of employing flat rolling is carried out the rolling steel bar that obtains of 12～14 passages to the steel billet after heating in the step (1), the import and export of each milling train is provided with and is used to guide steel billet direction and the state guide and guard that pass in and out milling train smoothly on request when rolling, the lengthening coefficient of controlling every time in the operation of rolling is 1.1～1.4, every time spread coefficient is 0.3～0.4, and the speed of service of steel billet is 0.3m/s～5.7m/s in the operation of rolling;
(3) pre-finish rolling: adopt flying shear to cut off the irregular place of Head and Tail Shape of steel bar described in the step (2), the steel bar after will shearing then carries out pre-finish rolling;
(4) finish rolling: adopt flying shear to cut off the irregular place of steel bar Head and Tail Shape after the pre-finish rolling in the step (3), the steel bar after will shearing then carries out finish rolling and obtains wire rod;
(5) weave silk: adopt Laying head to change wire rod described in the step (4) into ring shape, obtain wire-rod roll;
(6) control is cold: wire-rod roll described in the step (5) is cooled off by water-cooled and air-cooled mode successively;
(7) packing: with cooled wire-rod roll packing in the step (6), 82B high-speed rod wire rod gets product.
The lengthening coefficient of each passage is controlled at respectively described in the above-mentioned steps (2): the first passage lengthening coefficient is 1.2～1.3, the second passage lengthening coefficient is 1.3～1.4, the 3rd passage lengthening coefficient is 1.3～1.4, the four-pass lengthening coefficient is 1.3～1.4, the 5th passage lengthening coefficient is 1.3～1.4, the 6th passage lengthening coefficient is 1.2～1.3, the 7th passage lengthening coefficient is 1.3～1.35, the 8th passage lengthening coefficient is 1.25～1.3, the 9th passage lengthening coefficient is 1.3～1.35, the tenth passage lengthening coefficient is 1.21～1.25, the tenth a time lengthening coefficient is 1.25～1.29, the 12 passage lengthening coefficient is 1.21～1.23, and the 13 passage lengthening coefficient is 1.1～1.12, and the tenth four-pass lengthening coefficient is 1.35～1.37; The lengthening coefficient of preferred each passage is controlled at respectively: the first passage lengthening coefficient is 1.25, the second passage lengthening coefficient is 1.35, the 3rd passage lengthening coefficient is 1.36, the four-pass lengthening coefficient is 1.35, the 5th passage lengthening coefficient is 1.34, the 6th passage lengthening coefficient is 1.26, the 7th passage lengthening coefficient is 1.32, the 8th passage lengthening coefficient is that 1.28, the nine passage lengthening coefficients are that 1.33, the ten passage lengthening coefficients are 1.23, the tenth a time lengthening coefficient is 1.27, the 12 passage lengthening coefficient is that 1.22, the ten three passage lengthening coefficients are that 1.11, the ten four-pass lengthening coefficients are 1.36.
Described in the above-mentioned steps (2) in the operation of rolling speed of service of steel billet be 3m/s～5.7m/s.
The present invention compared with prior art has the following advantages:
1, technology of the present invention does not need special installation, and processing cost is low, easily realizes suitability for industrialized production.
2, technology of the present invention can realize that not only conventional frame short spacing is rolling, can realize that also the frame spacing is rolling greater than the long spacing of 2 meters～5 meters of conventional units.
3, the present invention finds out the deformation parameter (being lengthening coefficient and spread coefficient) of steel material in the 82B high-speed rod wire rod production process by practice, effectively control steel material change in size, the steel material off-square problem that atresia Rolling Production technology before having solved exists, the production accident rate is significantly reduced, product quality is improved, and has tangible economic benefit.
4, adopt technology of the present invention, roll consumption reduces by 70% than common process, and stand motor duty ratio common process descends 8%, and operating rate improves 1.2% than common process, and the 82B high-speed rod wire rod of production meets the YB/T146-1998 standard.
Below by embodiment, technical scheme of the present invention is described in further detail.
The specific embodiment
Embodiment 1
The technology that the grooveless rolling of present embodiment is produced the high-speed rod wire rod mainly comprises: heating, grooveless rolling, pre-finish rolling, finish rolling, weave silk, control the cold-peace packing, wherein, grooveless rolling adopts 12 passage flat rollings; This technology is specific as follows:
(1) heating: adopting walking beam furnace is that the steel billet of 135mm * 135mm is heated to 980 ℃ with sectional dimension;
(2) grooveless rolling: the mode of employing flat rolling is carried out the rolling steel bar that obtains of 12 passages to the steel billet after heating in the step (1), the import and export of each milling train is provided with and is used to guide steel billet direction and the state guide and guard that pass in and out milling train smoothly on request when rolling, the lengthening coefficient of controlling every time in the operation of rolling is respectively: first passage 1.2, second passage 1.4, the 3rd passage 1.3, four-pass 1.35, the 5th passage 1.4, the 6th passage 1.2, the 7th passage 1.3, the 8th passage 1.25, the nine passages 1.35, the ten passages 1.21, the tenth a time 1.25, the 12 passage 1.23, every time spread coefficient is 0.3～0.4, the speed of service of steel billet is 0.3m/s in the operation of rolling;
(3) pre-finish rolling: (about 50mm～100mm), the steel bar after will shearing then carries out pre-finish rolling according to conventional method to adopt flying shear to cut off the irregular place of Head and Tail Shape of steel bar described in the step (2);
(4) finish rolling: (about 50mm～100mm), the steel bar after will shearing then carries out finish rolling according to conventional method and obtains the wire rod that sectional dimension is Φ 12.5mm to adopt flying shear to cut off in the step (3) the irregular place of steel bar Head and Tail Shape after the pre-finish rolling;
(5) weave silk: adopt Laying head to change wire rod described in the step (4) into ring shape, obtain wire-rod roll;
(6) control is cold: wire-rod roll described in the step (5) is cooled off by conventional water-cooled and air-cooled mode successively;
(7) packing: with cooled wire-rod roll packing in the step (6), 82B high-speed rod wire rod gets product.
Present embodiment is by the deformation parameter (being lengthening coefficient and spread coefficient) of steel material in the control production process, effectively control steel material change in size, the steel material off-square problem that atresia Rolling Production technology before having solved exists, the production accident rate is significantly reduced, product quality is improved, and has tangible economic benefit.The 82B high-speed rod wire rod of present embodiment production meets the YB/T146-1998 standard.
Embodiment 2
The technology that the grooveless rolling of present embodiment is produced the high-speed rod wire rod mainly comprises: heating, grooveless rolling, pre-finish rolling, finish rolling, weave silk, control the cold-peace packing, wherein, grooveless rolling adopts 13 passage flat rollings; This technology is specific as follows:
(1) heating: adopting walking beam furnace is that the steel billet of 135mm * 135mm is heated to 1000 ℃ with sectional dimension;
(2) grooveless rolling: the mode of employing flat rolling is carried out the rolling steel bar that obtains of 13 passages to the steel billet after heating in the step (1), the import and export of each milling train is provided with and is used to guide steel billet direction and the state guide and guard that pass in and out milling train smoothly on request when rolling, the lengthening coefficient of controlling every time in the operation of rolling is respectively: first passage 1.3, second passage 1.35, the 3rd passage 1.35, four-pass 1.4, the 5th passage 1.35, the 6th passage 1.3, the 7th passage 1.35, the eight passages 1.3, the nine passages 1.3, the tenth passage 1.25, the tenth a time 1.29, the 12 passages 1.21, the 13 passages 1.12, every time spread coefficient is 0.35～0.4, and the speed of service of steel billet is 3m/s in the operation of rolling;
(3) pre-finish rolling: (about 50mm～100mm), the steel bar after will shearing then carries out pre-finish rolling according to conventional method to adopt flying shear to cut off the irregular place of Head and Tail Shape of steel bar described in the step (2);
(4) finish rolling: (about 50mm～100mm), the steel bar after will shearing then carries out finish rolling according to conventional method and obtains the wire rod that sectional dimension is Φ 10.0mm to adopt flying shear to cut off in the step (3) the irregular place of steel bar Head and Tail Shape after the pre-finish rolling;
(5) weave silk: adopt Laying head to change wire rod described in the step (4) into ring shape, obtain wire-rod roll;
(6) control is cold: wire-rod roll described in the step (5) is cooled off by conventional water-cooled and air-cooled mode successively;
(7) packing: with cooled wire-rod roll packing in the step (6), 82B high-speed rod wire rod gets product.
Present embodiment is by the deformation parameter (being lengthening coefficient and spread coefficient) of steel material in the control production process, effectively control steel material change in size, the steel material off-square problem that atresia Rolling Production technology before having solved exists, the production accident rate is significantly reduced, product quality is improved, and has tangible economic benefit.The 82B high-speed rod wire rod of present embodiment production meets the YB/T146-1998 standard.
Embodiment 3
The technology that the grooveless rolling of present embodiment is produced the high-speed rod wire rod mainly comprises: heating, grooveless rolling, pre-finish rolling, finish rolling, weave silk, control the cold-peace packing, wherein, grooveless rolling adopts 14 passage flat rollings; This technology is specific as follows:
(1) heating: adopting walking beam furnace is that the steel billet of 150mm * 150mm is heated to 1100 ℃ with sectional dimension;
(2) grooveless rolling: the mode of employing flat rolling is carried out the rolling steel bar that obtains of 14 passages to the steel billet after heating in the step (1), the import and export of each milling train is provided with and is used to guide steel billet direction and the state guide and guard that pass in and out milling train smoothly on request when rolling, the lengthening coefficient of controlling every time in the operation of rolling is respectively: first passage 1.25, second passage 1.3, the 3rd passage 1.4, four-pass 1.3, the 5th passage 1.3, the 6th passage 1.25, the seven passages 1.32, the eight passages 1.29, the 9th passage 1.34, the tenth passage 1.23, the ten a time 1.27, the 12 passages 1.22, the 13 passage 1.1, the tenth four-pass 1.35, every time spread coefficient is 0.32～0.4, the speed of service of steel billet is 5.7m/s in the operation of rolling;
(3) pre-finish rolling: (about 50mm～100mm), the steel bar after will shearing then carries out pre-finish rolling according to conventional method to adopt flying shear to cut off the irregular place of Head and Tail Shape of steel bar described in the step (2);
(4) finish rolling: (about 50mm～100mm), the steel bar after will shearing then carries out finish rolling according to conventional method and obtains the wire rod that sectional dimension is Φ 12.5mm to adopt flying shear to cut off in the step (3) the irregular place of steel bar Head and Tail Shape after the pre-finish rolling;
(5) weave silk: adopt Laying head to change wire rod described in the step (4) into ring shape, obtain wire-rod roll;
(6) control is cold: wire-rod roll described in the step (5) is cooled off by conventional water-cooled and air-cooled mode successively;
(7) packing: with cooled wire-rod roll packing in the step (6), 82B high-speed rod wire rod gets product.
Present embodiment is by the deformation parameter (lengthening coefficient and spread coefficient) of steel material in the control production process, effectively control steel material change in size, the steel material off-square problem that atresia Rolling Production technology before having solved exists, the production accident rate is significantly reduced, product quality is improved, and has tangible economic benefit.The 82B high-speed rod wire rod of present embodiment production meets the YB/T146-1998 standard.
Embodiment 4
The technology that the grooveless rolling of present embodiment is produced the high-speed rod wire rod mainly comprises: heating, grooveless rolling, pre-finish rolling, finish rolling, weave silk, control the cold-peace packing, wherein, grooveless rolling adopts 12 passage flat rollings; This technology is specific as follows:
(1) heating: adopting walking beam furnace is that the steel billet of 165mm * 165mm is heated to 990 ℃ with sectional dimension;
(2) grooveless rolling: the mode of employing flat rolling is carried out the rolling steel bar that obtains of 12 passages to the steel billet after heating in the step (1), the import and export of each milling train is provided with and is used to guide steel billet direction and the state guide and guard that pass in and out milling train smoothly on request when rolling, the lengthening coefficient of controlling every time in the operation of rolling is respectively: first passage 1.1, second passage 1.25, the 3rd passage 1.1, four-pass 1.1, the 5th passage 1.2, the 6th passage 1.1, the 7th passage 1.4, the 8th passage 1.1, the nine passages 1.4, the ten passages 1.1, the tenth a time 1.4, the 12 passage 1.4, every time spread coefficient is 0.3～0.38, the speed of service of steel billet is 3.1m/s in the operation of rolling;
(3) pre-finish rolling: (about 50mm～100mm), the steel bar after will shearing then carries out pre-finish rolling according to conventional method to adopt flying shear to cut off the irregular place of Head and Tail Shape of steel bar described in the step (2);
(4) finish rolling: (about 50mm～100mm), the steel bar after will shearing then carries out finish rolling according to conventional method and obtains the wire rod that sectional dimension is Φ 12.5mm to adopt flying shear to cut off in the step (3) the irregular place of steel bar Head and Tail Shape after the pre-finish rolling;
(5) weave silk: adopt Laying head to change wire rod described in the step (4) into ring shape, obtain wire-rod roll;
(6) control is cold: wire-rod roll described in the step (5) is cooled off by conventional water-cooled and air-cooled mode successively;
(7) packing: with cooled wire-rod roll packing in the step (6), 82B high-speed rod wire rod gets product.
Present embodiment is by the deformation parameter (being lengthening coefficient and spread coefficient) of steel material in the control production process, effectively control steel material change in size, the steel material off-square problem that atresia Rolling Production technology before having solved exists, the production accident rate is significantly reduced, product quality is improved, and has tangible economic benefit.The 82B high-speed rod wire rod of present embodiment production meets the YB/T146-1998 standard.
Embodiment 5
The technology that the grooveless rolling of present embodiment is produced the high-speed rod wire rod mainly comprises: heating, grooveless rolling, pre-finish rolling, finish rolling, weave silk, control the cold-peace packing, wherein, grooveless rolling adopts 13 passage flat rollings; This technology is specific as follows:
(1) heating: adopting walking beam furnace is that the steel billet of 165mm * 165mm is heated to 1030 ℃ with sectional dimension;
(2) grooveless rolling: the mode of employing flat rolling is carried out the rolling steel bar that obtains of 13 passages to the steel billet after heating in the step (1), the import and export of each milling train is provided with and is used to guide steel billet direction and the state guide and guard that pass in and out milling train smoothly on request when rolling, the lengthening coefficient of controlling every time in the operation of rolling is respectively: first passage 1.4, second passage 1.1, the 3rd passage 1.25, four-pass 1.28, the 5th passage 1.1, the 6th passage 1.4, the 7th passage 1.1, the eight passages 1.4, the nine passages 1.1, the tenth passage 1.4, the tenth a time 1.1, the 12 passages 1.1, the 13 passages 1.11, every time spread coefficient is 0.35～0.39, and the speed of service of steel billet is 4.9m/s in the operation of rolling;
(3) pre-finish rolling: (about 50mm～100mm), the steel bar after will shearing then carries out pre-finish rolling according to conventional method to adopt flying shear to cut off the irregular place of Head and Tail Shape of steel bar described in the step (2);
(4) finish rolling: (about 50mm～100mm), the steel bar after will shearing then carries out finish rolling according to conventional method and obtains the wire rod that sectional dimension is Φ 8.0mm to adopt flying shear to cut off in the step (3) the irregular place of steel bar Head and Tail Shape after the pre-finish rolling;
(5) weave silk: adopt Laying head to change wire rod described in the step (4) into ring shape, obtain wire-rod roll;
(6) control is cold: wire-rod roll described in the step (5) is cooled off by conventional water-cooled and air-cooled mode successively;
(7) packing: with cooled wire-rod roll packing in the step (6), 82B high-speed rod wire rod gets product.
Present embodiment is by the deformation parameter (being lengthening coefficient and spread coefficient) of steel material in the control production process, effectively control steel material change in size, the steel material off-square problem that atresia Rolling Production technology before having solved exists, the production accident rate is significantly reduced, product quality is improved, and has tangible economic benefit.The 82B high-speed rod wire rod of present embodiment production meets the YB/T146-1998 standard.
Embodiment 6
The technology that the grooveless rolling of present embodiment is produced the high-speed rod wire rod mainly comprises: heating, grooveless rolling, pre-finish rolling, finish rolling, weave silk, control the cold-peace packing, wherein, grooveless rolling adopts 14 passage flat rollings; This technology is specific as follows:
(1) heating: adopting walking beam furnace is that the steel billet of 165mm * 165mm is heated to 1080 ℃ with sectional dimension;
(2) grooveless rolling: the mode of employing flat rolling is carried out the rolling steel bar that obtains of 14 passages to the steel billet after heating in the step (1), the import and export of each milling train is provided with and is used to guide steel billet direction and the state guide and guard that pass in and out milling train smoothly on request when rolling, the lengthening coefficient of controlling every time in the operation of rolling is respectively: first passage 1.23, second passage 1.3, the 3rd passage 1.4, four-pass 1.3, the 5th passage 1.3, the 6th passage 1.25, the seven passages 1.32, the eight passages 1.29, the 9th passage 1.25, the tenth passage 1.3, the ten a time 1.28, the 12 passages 1.32, the 13 passage 1.4, the tenth four-pass 1.37, every time spread coefficient is 0.32～0.4, the speed of service of steel billet is 4.2m/s in the operation of rolling;
(3) pre-finish rolling: (about 50mm～100mm), the steel bar after will shearing then carries out pre-finish rolling according to conventional method to adopt flying shear to cut off the irregular place of Head and Tail Shape of steel bar described in the step (2);
(4) finish rolling: (about 50mm～100mm), the steel bar after will shearing then carries out finish rolling according to conventional method and obtains the wire rod that sectional dimension is Φ 10.0mm to adopt flying shear to cut off in the step (3) the irregular place of steel bar Head and Tail Shape after the pre-finish rolling;
(5) weave silk: adopt Laying head to change wire rod described in the step (4) into ring shape, obtain wire-rod roll;
(6) control is cold: wire-rod roll described in the step (5) is cooled off by conventional water-cooled and air-cooled mode successively;
(7) packing: with cooled wire-rod roll packing in the step (6), 82B high-speed rod wire rod gets product.
Present embodiment is by the deformation parameter (being lengthening coefficient and spread coefficient) of steel material in the control production process, effectively control steel material change in size, the steel material off-square problem that atresia Rolling Production technology before having solved exists, the production accident rate is significantly reduced, product quality is improved, and has tangible economic benefit.The 82B high-speed rod wire rod of present embodiment production meets the YB/T146-1998 standard.
Embodiment 7
The technology that the grooveless rolling of present embodiment is produced the high-speed rod wire rod mainly comprises: heating, grooveless rolling, pre-finish rolling, finish rolling, weave silk, control the cold-peace packing, wherein, grooveless rolling adopts 14 passage flat rollings; This technology is specific as follows:
(1) heating: adopting walking beam furnace is that the steel billet of 150mm * 150mm is heated to 1080 ℃ with sectional dimension;
(2) grooveless rolling: the mode of employing flat rolling is carried out the rolling steel bar that obtains of 14 passages to the steel billet after heating in the step (1), the import and export of each milling train is provided with and is used to guide steel billet direction and the state guide and guard that pass in and out milling train smoothly on request when rolling, the lengthening coefficient of controlling every time in the operation of rolling is respectively: first passage 1.3, second passage 1.32, the 3rd passage 1.32, four-pass 1.38, the 5th passage 1.36, the 6th passage 1.25, the seven passages 1.32, the eight passages 1.26, the 9th passage 1.33, the tenth passage 1.24, the ten a time 1.26, the 12 passages 1.22, the 13 passage 1.25, the tenth four-pass 1.1, every time spread coefficient is 0.3～0.36, the speed of service of steel billet is 4.5m/s in the operation of rolling;
(3) pre-finish rolling: (about 50mm～100mm), the steel bar after will shearing then carries out pre-finish rolling according to conventional method to adopt flying shear to cut off the irregular place of Head and Tail Shape of steel bar described in the step (2);
(4) finish rolling: (about 50mm～100mm), the steel bar after will shearing then carries out finish rolling according to conventional method and obtains the wire rod that sectional dimension is Φ 12.5mm to adopt flying shear to cut off in the step (3) the irregular place of steel bar Head and Tail Shape after the pre-finish rolling;
(5) weave silk: adopt Laying head to change wire rod described in the step (4) into ring shape, obtain wire-rod roll;
(6) control is cold: wire-rod roll described in the step (5) is cooled off by conventional water-cooled and air-cooled mode successively;
(7) packing: with cooled wire-rod roll packing in the step (6), 82B high-speed rod wire rod gets product.
Present embodiment is by the deformation parameter (being lengthening coefficient and spread coefficient) of steel material in the control production process, effectively control steel material change in size, the steel material off-square problem that atresia Rolling Production technology before having solved exists, the production accident rate is significantly reduced, product quality is improved, and has tangible economic benefit.The 82B high-speed rod wire rod of present embodiment production meets the YB/T146-1998 standard.
Embodiment 8
The technology that the grooveless rolling of present embodiment is produced the high-speed rod wire rod mainly comprises: heating, grooveless rolling, pre-finish rolling, finish rolling, weave silk, control the cold-peace packing, wherein, grooveless rolling adopts 14 passage flat rollings; This technology is specific as follows:
(1) heating: adopting walking beam furnace is that the steel billet of 165mm * 165mm is heated to 1080 ℃ with sectional dimension;
(2) grooveless rolling: the mode of employing flat rolling is carried out the rolling steel bar that obtains of 14 passages to the steel billet after heating in the step (1), the import and export of each milling train is provided with and is used to guide steel billet direction and the state guide and guard that pass in and out milling train smoothly on request when rolling, the lengthening coefficient of controlling every time in the operation of rolling is respectively: first passage 1.28, second passage 1.32, the 3rd passage 1.35, four-pass 1.31, the 5th passage 1.32, the 6th passage 1.22, the seven passages 1.34, the eight passages 1.27, the 9th passage 1.33, the tenth passage 1.22, the ten a time 1.26, the 12 passages 1.22, the 13 passage 1.25, the tenth four-pass 1.4, every time spread coefficient is 0.32～0.38, the speed of service of steel billet is 4.2m/s in the operation of rolling;
(3) pre-finish rolling: (about 50mm～100mm), the steel bar after will shearing then carries out pre-finish rolling according to conventional method to adopt flying shear to cut off the irregular place of Head and Tail Shape of steel bar described in the step (2);
(4) finish rolling: (about 50mm～100mm), the steel bar after will shearing then carries out finish rolling according to conventional method and obtains the wire rod that sectional dimension is Φ 8.0mm to adopt flying shear to cut off in the step (3) the irregular place of steel bar Head and Tail Shape after the pre-finish rolling;
(5) weave silk: adopt Laying head to change wire rod described in the step (4) into ring shape, obtain wire-rod roll;
(6) control is cold: wire-rod roll described in the step (5) is cooled off by conventional water-cooled and air-cooled mode successively;
(7) packing: with cooled wire-rod roll packing in the step (6), 82B high-speed rod wire rod gets product.
Present embodiment is by the deformation parameter (being lengthening coefficient and spread coefficient) of steel material in the control production process, effectively control steel material change in size, the steel material off-square problem that atresia Rolling Production technology before having solved exists, the production accident rate is significantly reduced, product quality is improved, and has tangible economic benefit.The 82B high-speed rod wire rod of present embodiment production meets the YB/T146-1998 standard.
Embodiment 9
The technology that the grooveless rolling of present embodiment is produced the high-speed rod wire rod mainly comprises: heating, grooveless rolling, pre-finish rolling, finish rolling, weave silk, control the cold-peace packing, wherein, grooveless rolling adopts 14 passage flat rollings; This technology is specific as follows:
(1) heating: adopting walking beam furnace is that the steel billet of 150mm * 150mm is heated to 1080 ℃ with sectional dimension;
(2) grooveless rolling: the mode of employing flat rolling is carried out the rolling steel bar that obtains of 14 passages to the steel billet after heating in the step (1), the import and export of each milling train is provided with and is used to guide steel billet direction and the state guide and guard that pass in and out milling train smoothly on request when rolling, the lengthening coefficient of controlling every time in the operation of rolling is respectively: first passage 1.25, second passage 1.35, the 3rd passage 1.36, four-pass 1.35, the 5th passage 1.34, the 6th passage 1.26, the seven passages 1.32, the eight passages 1.28, the 9th passage 1.33, the tenth passage 1.23, the ten a time 1.27, the 12 passages 1.22, the 13 passage 1.11, the tenth four-pass 1.36, every time spread coefficient is 0.35～0.4, the speed of service of steel billet is 5.2m/s in the operation of rolling;
(3) pre-finish rolling: (about 50mm～100mm), the steel bar after will shearing then carries out pre-finish rolling according to conventional method to adopt flying shear to cut off the irregular place of Head and Tail Shape of steel bar described in the step (2);
(4) finish rolling: (about 50mm～100mm), the steel bar after will shearing then carries out finish rolling according to conventional method and obtains the wire rod that sectional dimension is Φ 10.0mm to adopt flying shear to cut off in the step (3) the irregular place of steel bar Head and Tail Shape after the pre-finish rolling;
(5) weave silk: adopt Laying head to change wire rod described in the step (4) into ring shape, obtain wire-rod roll;
(6) control is cold: wire-rod roll described in the step (5) is cooled off by conventional water-cooled and air-cooled mode successively;
(7) packing: with cooled wire-rod roll packing in the step (6), 82B high-speed rod wire rod gets product.
Present embodiment is by the deformation parameter (being lengthening coefficient and spread coefficient) of steel material in the control production process, effectively control steel material change in size, the steel material off-square problem that atresia Rolling Production technology before having solved exists, the production accident rate is significantly reduced, product quality is improved, and has tangible economic benefit.The 82B high-speed rod wire rod of present embodiment production meets the YB/T146-1998 standard.
Adopt technology of the present invention, roll consumption reduces by 70% than common process, and stand motor duty ratio common process descends 8%, and operating rate improves 1.2% than common process, and the 82B high-speed rod wire rod of production meets the YB/T146-1998 standard.
The above; it only is preferred embodiment of the present invention; be not that the present invention is done any restriction, everyly any simple modification that above embodiment did, change and equivalent structure changed, all still belong in the protection domain of technical solution of the present invention according to the invention technical spirit.
Claims (4)
1. a grooveless rolling is produced the technology of high-speed rod wire rod, it is characterized in that this technology mainly comprises: heating, grooveless rolling, pre-finish rolling, finish rolling, weave silk, control the cold-peace packing, wherein, grooveless rolling adopts the multi-pass flat rolling; This technology is specific as follows:
(1) heating: the steel billet that adopts walking beam furnace will produce 82B high-speed rod wire rod is heated to 980 ℃～1100 ℃;
(2) grooveless rolling: the mode of employing flat rolling is carried out the rolling steel bar that obtains of 12～14 passages to the steel billet after heating in the step (1), the import and export of each milling train is provided with and is used to guide steel billet direction and the state guide and guard that pass in and out milling train smoothly on request when rolling, the lengthening coefficient of controlling every time in the operation of rolling is 1.1～1.4, every time spread coefficient is 0.3～0.4, and the speed of service of steel billet is 0.3m/s～5.7m/s in the operation of rolling;
(3) pre-finish rolling: adopt flying shear to cut off the irregular place of Head and Tail Shape of steel bar described in the step (2), the steel bar after will shearing then carries out pre-finish rolling;
(4) finish rolling: adopt flying shear to cut off the irregular place of steel bar Head and Tail Shape after the pre-finish rolling in the step (3), the steel bar after will shearing then carries out finish rolling and obtains wire rod;
(5) weave silk: adopt Laying head to change wire rod described in the step (4) into ring shape, obtain wire-rod roll;
(6) control is cold: wire-rod roll described in the step (5) is cooled off by water-cooled and air-cooled mode successively;
(7) packing: with cooled wire-rod roll packing in the step (6), 82B high-speed rod wire rod gets product.
2. grooveless rolling according to claim 1 is produced the technology of high-speed rod wire rod, it is characterized in that, the lengthening coefficient of each passage is controlled at respectively described in the step (2): the first passage lengthening coefficient is 1.2～1.3, the second passage lengthening coefficient is 1.3～1.4, the 3rd passage lengthening coefficient is 1.3～1.4, the four-pass lengthening coefficient is 1.3～1.4, the 5th passage lengthening coefficient is 1.3～1.4, the 6th passage lengthening coefficient is 1.2～1.3, the 7th passage lengthening coefficient is 1.3～1.35, the 8th passage lengthening coefficient is 1.25～1.3, the 9th passage lengthening coefficient is 1.3～1.35, the tenth passage lengthening coefficient is 1.21～1.25, the tenth a time lengthening coefficient is 1.25～1.29, the 12 passage lengthening coefficient is 1.21～1.23, and the 13 passage lengthening coefficient is 1.1～1.12, and the tenth four-pass lengthening coefficient is 1.35～1.37.
3. grooveless rolling according to claim 2 is produced the technology of high-speed rod wire rod, it is characterized in that, the lengthening coefficient of described each passage is controlled at respectively: the first passage lengthening coefficient is 1.25, the second passage lengthening coefficient is 1.35, the 3rd passage lengthening coefficient is 1.36, the four-pass lengthening coefficient is 1.35, the 5th passage lengthening coefficient is 1.34, the 6th passage lengthening coefficient is 1.26, the 7th passage lengthening coefficient is 1.32, the 8th passage lengthening coefficient is that 1.28, the nine passage lengthening coefficients are that 1.33, the ten passage lengthening coefficients are 1.23, the tenth a time lengthening coefficient is 1.27, the 12 passage lengthening coefficient is that 1.22, the ten three passage lengthening coefficients are that 1.11, the ten four-pass lengthening coefficients are 1.36.
4. grooveless rolling according to claim 1 is produced the technology of high-speed rod wire rod, it is characterized in that, described in the step (2) in the operation of rolling speed of service of steel billet be 3m/s～5.7m/s.
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