CN103468919A - Method for reducing roll marks on surface of steel plate in quenching furnace - Google Patents
Method for reducing roll marks on surface of steel plate in quenching furnace Download PDFInfo
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- CN103468919A CN103468919A CN2013103484609A CN201310348460A CN103468919A CN 103468919 A CN103468919 A CN 103468919A CN 2013103484609 A CN2013103484609 A CN 2013103484609A CN 201310348460 A CN201310348460 A CN 201310348460A CN 103468919 A CN103468919 A CN 103468919A
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Abstract
The invention relates to a method for reducing roll marks on the surface of a steel plate in a quenching furnace, and belongs to the technical field of technologies using quenching furnaces to produce steel plates. A technical scheme adopted by the invention is characterized in that a new temperature field in the furnace is set to make the temperature in the furnace change in a gradient manner and temperatures of a preheating zone and a heating zone in the furnace gradually increase in an arithmetic progression manner, a largest temperature is lower than a quenching temperature, and the temperature of a heat insulation zone is the quenching temperature; the set value of a lower portion temperature of the temperature field in the furnace is 8-20DEG C lower than the set of an upper portion temperature of the temperature field in the furnace; and the wing speed in the steel plate furnace is adjusted to 1-1.2m/min. In the invention, a heating mode combining temperature gradient steel burning and a difference between the upper and lower portion temperatures in the furnace is adopted, and the swing speed in the steel plate furnace is adjusted, so the roll marks on the surface of the steel plate are effectively reduced. The method can control the steel plate roll mark reconditioning area within 10%, ensures that the quality of the surface of a quenched steel plate having high added values accords with requirements, and has a substantial economic benefit.
Description
Technical field
The present invention relates to a kind of minimizing and produce roll marks on quenching furnance light plate surface, to guarantee the method for plate surface quality, belong to quenching furnance and produce plater technology field.
Background technology
Along with the steel plate market competition is day by day fierce, the user has higher requirement to the visual appearance of steel plate, and as steel plate does not allow soldering, the figuring of surface area is no more than 10% requirement such as grade.At quenching furnance, produce in the steel plate process, quenching furnance belongs to roller hearth furnace, and the problem of surface of steel plate generation roll marks is perplexing the production of roller hearth furnace quenching furnance all the time.The major cause that roll marks produces be the roller hearth furnace roller aging after, can have the defects such as bulge, pockmark, slag nodule on roller, steel plate is softening at holding-zone, and the slag nodule protruded will eject at the lower surface of steel a hole to be come, even be attached on steel plate, therefore produce roll marks.
Control at present roller hearth furnace and produce the method for roll marks except to entering the stove steel plate, carrying out ball blast, beat groove to entering stove steel ingot rising head place, reduce outside the injury of stove steel plate to furnace bottom roll, also have by irregularly leading to stove, regulate the measures such as temperature field, but DeGrain, the roll marks problem not yet be improved significantly, also increase production cost when in addition, logical stove causes output too low frequently.
A large amount of steel plates is because the roll marks problem overstocks in a large number in the reconditioning operation, and especially the reconditioning area of slab surpasses 15%, not only increases the labour intensity of reconditioning work, also greatly extends manufacture cycle, and after simultaneously artificial reconditioning, easily causes local minus tolerance.Therefore, the roll marks problem of surface of steel plate has a strong impact on production schedule, and contract is caused to larger negative impact delivery date.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method that quenching furnance light plate surface produces roll marks that reduces, this method can significantly reduce the roll marks on quenching furnance light plate surface, improve plate surface quality, the roll marks reconditioning area control of quenching furnance steel plate, in 10%, is met the requirements with the surface quality of guaranteeing the high added value quenched nickelclad.
The technical scheme solved the problems of the technologies described above is:
A kind of method that reduces quenching furnance light plate surface generation roll marks, it adopts following technique:
1. set a kind of new temperature field in furnace, in stove, temperature province is divided into preheating zone, heating zone and heat preservation zone successively, in stove, temperature is the thermograde variation, the temperature of the interior preheating zone of stove and heating zone is from low to high arithmetic progression and increases progressively gradually, maximum temperature is lower than quenching temperature, and the temperature of heat preservation zone is quenching temperature;
2. the temperature field in furnace temperature of lower is set lower than upper temp and is set 8-20 ℃;
3. wave speed in the adjustment steel plate furnace, the speed of waving of steel plate is 1-1.2 m/min.
Above-mentioned minimizing quenching furnance light plate surface produces the method for roll marks, in described stove, the thermograde of preheating zone and heating zone is set as 5 grades, their temperature field in furnace upper temp numerical range is respectively 700-730 ℃, 750-780 ℃, 800-830 ℃, 850-900 ℃, 900-920 ℃, the Temperature numerical scope of heat preservation zone is 910-930 ℃, and the temperature field in furnace temperature of lower is set lower than upper temp and set 8-12 ℃.
Above-mentioned minimizing quenching furnance light plate surface produces the method for roll marks, on controling of the pressure of the oven, adopts the top pressure-fired to control, and pressure-controlling is at 10-15Pa, and bottom adopts micro-negative pressure to control, and pressure-controlling is negative 0-5Pa.
Above-mentioned minimizing quenching furnance light plate surface produces the method for roll marks, adjusts the steel plate rhythm of packing into, and the distance between two block plates of packing in front and back is greater than 2.5 meters, the front portion steel plate at rear portion of packing into of packing into when steel plate afterbody temperature reaches 750-780 ℃.
Usefulness of the present invention is:
The present invention adopts thermograde to burn the type of heating that in steel and stove, the top and the bottom temperature difference combines in stove, makes steel plate lower in the temperature of preheating zone and heating zone, and the lower surface of steel plate temperature, lower than upper surface, has effectively reduced surface of steel plate and produced roll marks simultaneously; The speed of waving of steel plate is adjusted into to 1 m/min, has reduced the motional inertia of steel plate, reduced roll marks expansion, obtain good result; Adopt the upper of furnace body pressure-fired, the micro-negative pressure in bottom is burnt steel, changes the heat direction of transfer; By controlling steel plate dress steel rhythm, improved heating quality.By the enforcement of aforesaid method, the steel plate roll marks reconditioning area control that quenching furnance is produced, in 10%, guarantees that the surface quality of high added value quenched nickelclad meets the requirements, and has significant economic benefit.The logical stove cycle once extends to 6-9 the logical stove of class once by the logical stove of 3 initial classes simultaneously, has effectively improved production efficiency, reduces simultaneously and changes furnace bottom roll spare part expense, has reduced production cost.
Embodiment
The present invention is by adopting a kind of method minimizing quenching furnance production surface of steel plate roll marks that quenching furnance light plate surface produces roll marks that reduces, the roll marks reconditioning area control of quenching furnance steel plate, in 10%, is met the requirements with the surface quality of guaranteeing the high added value quenched nickelclad.
The method that the present invention takes is:
At first, set a kind of new temperature field in furnace, in stove, temperature province is divided into preheating zone, heating zone and heat preservation zone successively, in stove, temperature is the thermograde variation, the temperature of the interior preheating zone of stove and heating zone is from low to high arithmetic progression and increases progressively gradually, maximum temperature is lower than quenching temperature, and the temperature of heat preservation zone is quenching temperature.The temperature field in furnace temperature of lower is set lower than upper temp and is set 8-20 ℃.
In above-mentioned stove, the thermograde of preheating zone and heating zone is set as 5 grades, their temperature field in furnace upper temp numerical range is respectively 700-730 ℃, 750-780 ℃, 800-830 ℃, 850-900 ℃, 900-920 ℃, the temperature of heat preservation zone is 910-930 ℃, and the temperature field in furnace temperature of lower is set lower than upper temp and set 8-12 ℃.
Secondly, adjust in steel plate furnace and wave speed, the speed of waving is adjusted into to 1-1.2 m/min.
Because steel plate weight is large, in moving process, inertia is large, if steel plate waves at a high speed for a long time in stove, easily in the process of waving, roll marks is magnified.Furnace bottom roll diameter 580mm, design rolling period 120 seconds according to quenching furnance, waves 3 m/mins of speed, and in rolling period, the steel plate operation is 6 meters, and furnace bottom roll turns a circumference and approximates 1.82 meters, more than within original period of swing, furnace bottom roll need rotate 3 circles.After series of experiments, the speed of waving is adjusted into to 1 m/min, obtain certain effect, both reduce the steel plate motional inertia and reduced roll marks expansion, one circle of furnace bottom roll rotation simultaneously reduces the generation of local bending phenomenon.
The 3rd, on controling of the pressure of the oven, adopt the top pressure-fired to control, pressure-controlling is at 10-15Pa, and bottom adopts micro-negative pressure to control, and pressure-controlling is negative 0-5Pa.
The 4th, adjust the steel plate rhythm of packing into, the distance between two block plates of packing in front and back is greater than 2.5 meters, the front portion steel plate at rear portion of packing into of packing into when steel plate afterbody temperature reaches 750-780 ℃.
Rationally control steel plate dress steel rhythm, effectively reduce roll marks and produce.Quenching furnance is subject to the short restriction of body of heater, steel plate easily occurs that in heat-processed the head and tail temperature difference is greatly that head meets tapping condition afterbody and also do not enter insulation, thereby cause the steel plate time inside furnace to extend, if the second block plate is after normal dress steel bar part enters in stove, cool steel absorbs heat in a large number, makes first afterbody more be difficult to enter insulation.For this situation, limit the second block plate and enter stove, the safe distance of two block plates is adjusted into to 2.5 meters simultaneously, treat that the first block plate afterbody temperature reaches more than 750 ℃, refill the second block plate, can effectively shorten the steel plate time inside furnace, thereby reduce roll marks, produce.
Because quenching furnance burns the advantages such as steel is even, cooling intensity is large, high added value steel alloy or the special-purpose steel such as the 12Cr2Mo1R of certain current Development and Production of iron and steel enterprise, 15CrMoR (H), 07MnNiMoVDR (L), 13MnNiMoR, 12Cr2Mo1R, 14Cr1MoR (H), WNM400A, WQ960E, NVE690, preferentially at quenching furnance, process, the surface quality of this type of steel requires generally very high, therefore, must effectively control the quenching furnance roll marks.
Specific examples 1:
Steel grade 12Cr2Mo1R, specification is 60*4070*9080, and in the quenching furnance normalizing, normalizing process is 930 ℃, and PLC+20min is specific as follows:
1, only will be incubated rear region 10-12 district and be made as 930 ℃, and the interior preheating zone of stove and Heating Zone Temperature increase progressively gradually by being from low to high arithmetic progression, adopt temperature gradient method as shown in the table to burn steel.
2, as shown above, the temperature field in furnace temperature of lower is set lower than upper temp and is set 10 ℃.
3, waving Speed Setting is 1 m/min.
4, on controling of the pressure of the oven, adopt the top pressure-fired to control, pressure-controlling is at 10-15Pa, and bottom adopts micro-negative pressure to control, and pressure-controlling is negative 0-5Pa.
Next block plate of packing into when 5, this block plate afterbody temperature reaches 780 ℃, and apart from 2.5 meters of this block plates.
This block plate adopts above-mentioned technique heating, and the less only head of roll marks has slight roll marks, and artificial reconditioning rear surface quality is good.
Specific examples 2:
Steel grade NV E690, specification is 97*2600*12413, at quenching furnance, quenches, and quenching technology is 910 ℃, and PLC+20min is specific as follows:
1, only will be incubated rear region 10-12 district and be made as 910 ℃, and the interior preheating zone of stove and Heating Zone Temperature increase progressively gradually by being from low to high arithmetic progression, adopt temperature gradient method as shown in the table to burn steel.
2, as shown above, the temperature field in furnace temperature of lower is set lower than upper temp and is set 8 ℃.
3, waving Speed Setting is 1 m/min.
4, on controling of the pressure of the oven, adopt the top pressure-fired to control, pressure-controlling is at 10-15Pa, and bottom adopts micro-negative pressure to control, and pressure-controlling is negative 0-5Pa.
Next block plate of packing into when 5, this block plate afterbody temperature reaches 750 ℃, and apart from 2.5 meters of this block plates.
This block plate adopts above-mentioned technique heating, has no roll marks, and surface quality is good.
Specific examples 3:
Steel grade 12Cr2Mo1R, specification is 82*3400*10387, and in the quenching furnance normalizing, quenching technology is 930 ℃, and PLC+20min is specific as follows:
1, only will be incubated rear region 10-12 district and be made as 930 ℃, and the interior preheating zone of stove and Heating Zone Temperature increase progressively gradually by being from low to high arithmetic progression, adopt temperature gradient method as shown in the table to burn steel.
2, as shown above, the temperature field in furnace temperature of lower is set lower than upper temp and is set 12 ℃.
3, waving Speed Setting is 1 m/min.
4, on controling of the pressure of the oven, adopt the top pressure-fired to control, pressure-controlling is at 10-15Pa, and bottom adopts micro-negative pressure to control, and pressure-controlling is negative 0-5Pa.
Next block plate of packing into when 5, this block plate afterbody temperature reaches 780 ℃, and apart from 2.5 meters of this block plates.
This block plate adopts above-mentioned technique heating, has no roll marks, and surface quality is good.
Specific examples 4:
Steel grade WQ690D, specification is 100*2320*10080, at quenching furnance, quenches, and quenching technology is 910 ℃, and PLC+20min is specific as follows:
1, only will be incubated rear region 10-12 district and be made as 910 ℃, and the interior preheating zone of stove and Heating Zone Temperature increase progressively gradually by being from low to high arithmetic progression, adopt temperature gradient method as shown in the table to burn steel.
2, as shown above, the temperature field in furnace temperature of lower is set lower than upper temp and is set 20 ℃.
3, waving Speed Setting is 1 m/min.
4, on controling of the pressure of the oven, adopt the top pressure-fired to control, pressure-controlling is at 10-15Pa, and bottom adopts micro-negative pressure to control, and pressure-controlling is negative 0-5Pa.
Next block plate of packing into when 5, this block plate afterbody temperature reaches 750 ℃, and apart from 2.5 meters of this block plates.
This block plate adopts above-mentioned technique heating, has no roll marks, and surface quality is good.
Claims (4)
1. one kind is reduced the method that quenching furnance light plate surface produces roll marks, and it is characterized in that: it adopts following technique:
(1) set a kind of new temperature field in furnace, in stove, temperature province is divided into preheating zone, heating zone and heat preservation zone successively, in stove, temperature is the thermograde variation, the temperature of the interior preheating zone of stove and heating zone is from low to high arithmetic progression and increases progressively gradually, maximum temperature is lower than quenching temperature, and the temperature of heat preservation zone is quenching temperature;
(2) the temperature field in furnace temperature of lower is set lower than upper temp and is set 8-20 ℃;
(3) adjust in steel plate furnace and wave speed, the speed of waving of steel plate is 1-1.2 m/min.
2. minimizing quenching furnance light plate according to claim 1 surface produces the method for roll marks, it is characterized in that: in described stove, the thermograde of preheating zone and heating zone is set as 5 grades, their temperature field in furnace upper temp numerical range is respectively 700-730 ℃, 750-780 ℃, 800-830 ℃, 850-900 ℃, 900-920 ℃, the Temperature numerical scope of heat preservation zone is 910-930 ℃, and the temperature field in furnace temperature of lower is set lower than upper temp and set 8-12 ℃.
3. minimizing quenching furnance light plate according to claim 2 surface produces the method for roll marks, it is characterized in that: on controling of the pressure of the oven, adopt the top pressure-fired to control, pressure-controlling is at 10-15Pa, and bottom adopts micro-negative pressure to control, and pressure-controlling is negative 0-5Pa.
4. minimizing quenching furnance light plate according to claim 3 surface produces the method for roll marks, it is characterized in that: adjust the steel plate rhythm of packing into, before and after distance between two block plates of packing into be greater than 2.5 meters, the front portion steel plate at rear portion of packing into of packing into when steel plate afterbody temperature reaches 750-780 ℃.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105314987A (en) * | 2014-05-26 | 2016-02-10 | 中国科学院金属研究所 | Ceramic molding core sintering process |
| CN108754085A (en) * | 2018-07-02 | 2018-11-06 | 洛阳Lyc轴承有限公司 | A kind of GCr15 small steels thin-wall bearing ferrule Bainitic hardening process |
| CN110512055A (en) * | 2018-05-22 | 2019-11-29 | 宝山钢铁股份有限公司 | The processing method of strip dross coining defect in a kind of Horizental annealer |
| CN111020174A (en) * | 2019-12-11 | 2020-04-17 | 舞阳钢铁有限责任公司 | Method for reducing roll marks generated on surface of steel plate in quenching furnace |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020104598A1 (en) * | 2001-01-31 | 2002-08-08 | Stein Heurtey | Heating process of steel strips in vertical furnaces |
| CN2885881Y (en) * | 2006-04-10 | 2007-04-04 | 范本良 | Full-electric roller hearth-type continuous annealing furnace |
| CN102851477A (en) * | 2011-06-28 | 2013-01-02 | 鞍钢股份有限公司 | Method for reducing hearth roll mark defect on steel plate surface |
-
2013
- 2013-08-12 CN CN201310348460.9A patent/CN103468919B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020104598A1 (en) * | 2001-01-31 | 2002-08-08 | Stein Heurtey | Heating process of steel strips in vertical furnaces |
| CN2885881Y (en) * | 2006-04-10 | 2007-04-04 | 范本良 | Full-electric roller hearth-type continuous annealing furnace |
| CN102851477A (en) * | 2011-06-28 | 2013-01-02 | 鞍钢股份有限公司 | Method for reducing hearth roll mark defect on steel plate surface |
Non-Patent Citations (2)
| Title |
|---|
| 张四民: "钢板常化辊印的分析及预防", 《宽厚板》, vol. 5, no. 3, 31 March 1999 (1999-03-31) * |
| 杨振东: "中厚板无抛丸常化炉炉辊结瘤控制", 《轧钢》, vol. 27, no. 1, 28 February 2010 (2010-02-28) * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105314987A (en) * | 2014-05-26 | 2016-02-10 | 中国科学院金属研究所 | Ceramic molding core sintering process |
| CN105314987B (en) * | 2014-05-26 | 2018-02-23 | 中国科学院金属研究所 | A kind of sintering process of ceramic core |
| CN110512055A (en) * | 2018-05-22 | 2019-11-29 | 宝山钢铁股份有限公司 | The processing method of strip dross coining defect in a kind of Horizental annealer |
| CN110512055B (en) * | 2018-05-22 | 2021-03-12 | 宝山钢铁股份有限公司 | Method for treating strip steel nodulation impression defects in horizontal annealing furnace |
| CN108754085A (en) * | 2018-07-02 | 2018-11-06 | 洛阳Lyc轴承有限公司 | A kind of GCr15 small steels thin-wall bearing ferrule Bainitic hardening process |
| CN111020174A (en) * | 2019-12-11 | 2020-04-17 | 舞阳钢铁有限责任公司 | Method for reducing roll marks generated on surface of steel plate in quenching furnace |
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| CN103468919B (en) | 2015-05-20 |
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