CN102199696A - Production method for preheating and insulating special alloy steel - Google Patents
Production method for preheating and insulating special alloy steel Download PDFInfo
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- CN102199696A CN102199696A CN2010101351115A CN201010135111A CN102199696A CN 102199696 A CN102199696 A CN 102199696A CN 2010101351115 A CN2010101351115 A CN 2010101351115A CN 201010135111 A CN201010135111 A CN 201010135111A CN 102199696 A CN102199696 A CN 102199696A
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Abstract
The invention discloses a production technology for preheating and insulating special alloy steel, comprising the following steps of: a. pickling raw material black steel coils, followed by trimming; b. performing a preheating and heat-insulation treatment by a bell furnace wherein the preheating temperature ranges from 100 DEG C to 200 DEG C and the insulation process lasts for 2-6 hours; c. lightering the preheated and heat-insulated steel coils, followed by rolling; d. annealing. According to the invention, the production method, which employs the present stainless steel cold rolling production equipment bell furnace for preheating and heat-insulation to guarantee an uniform and controllable insulation, not only saves investment, but also helps minimize edge crack during the rolling process and guarantee the control precision of the rolling thickness, is easy and safe to utilize and protects environments, and can be applied in manufacturers which need to produce special alloy steel and have no preheating and heat-insulation facilities.
Description
Technical field
The present invention relates to a kind of alloy steel rolling production technology, especially suitable hardness height, the preheating insulation production technique of Special Alloy Steel before rolling that fragility is big, plasticity is low.
Background technology
Some Special Alloy Steel, because of alloying constituent content higher (higher or to contain silicone content higher as carbon content, Si＞2% or C＞0.1% mass percent normally), make under the coil of strip room temperature hardness higher, fragility increase, toughness and plasticity variation, as directly rolling, be easy to occur the limit and split and cause the broken belt accident, bigger to unit equipment and ordinary production influence.Therefore at present for ensureing ordinary production, producing these hardness height, fragility is big, during the low Special Alloy Steel of plasticity, usually before rolling, need to carry out preheating insulation, be about to Special Alloy Steel through primary heater unit, heat tracing for some time, make it have certain plasticity and toughness, so that it is follow-up normally rolling, the production link so preheating insulation is absolutely necessary, preheating temperature is generally 100～200 ℃ (preheating temperature can not be too high, as too high, the easy oxidation and rusting of coil of strip then), be incubated several hours, coil of strip temperature before rolling will be guaranteed at least more than 50 ℃.When company produced the Special Alloy Steel that some fragility is big, hardness is high both at home and abroad at present, great majority adopted the sweating room device that coil of strip is carried out preheating insulation, and the water-bath of employing preheating insulation is also arranged, and were used less but make, and are specific as follows:
1) steam preheating method: set up the room of relative closure, can hold several coil of strips, use the steam indirect heating, coil of strip enters vaporium by small rail car, and heat tracing is heated evenly coil of strip integral body after for some time, and reaching desired temperature, second hand rail road dolly transports vaporium and is rolled.The advantage of this method: use the steam indirect heating, the coil of strip quick heating, and be heated evenly, effect is better; Shortcoming: invest greatlyyer, need to lay steam-pipe, construction complexity and time cycle are longer.
2) water-bath preheating method: set up several bigger containers, directly inject water, heat, coil of strip is directly put into water, carry out heat tracing with steam or electricity, treat that coil of strip reaches certain temperature after, again with the driving hang out rolling.The advantage of this method: simple possible; Shortcoming: after the coil of strip preheating hung out, the water that adheres to above can drop onto on the ground, and the driving handling, went up when volume is worn band and all can produce potential safety hazard, did not meet situ production reality; Heating in water bath is behind comparatively high temps in addition, and some Special Alloy Steel is easy to oxidation and rusting.
But some manufacturing enterprise does not possess the preheating insulation special facilities, in order to produce Special Alloy Steel, need to build preheating insulation equipment, though steam preheating method effect is better, but need to lay in addition the steam pipe special, build the facilities such as small rail car of heating room and transportation coil of strip, have problems such as investment is big, the building time cycle is long.
Therefore for producing Special Alloy Steel, need a kind of both the investment not quite, can satisfy the preheating insulation method of situ production reality again fully.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of preheating insulation production technique of investing the Special Alloy Steel low, that method is simple and safe at the above-mentioned state of the art, makes Special Alloy Steel have certain plasticity and toughness, reduces the limit and splits.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be: a kind of preheating insulation production technique of Special Alloy Steel is characterized in that may further comprise the steps:
A, will cut edge after the pickling of raw material casting skin coil of strip, remove the oxide skin on surface;
B, employing bell furnace carry out preheating insulation, and preheating temperature is 100～200 ℃, soaking time 2～6 hours; Guaranteed that coil of strip heats up and pre-heat effect as early as possible, has avoided the coil of strip oxidation and rusting again;
C, with the coil of strip behind the preheating insulation lighter the back rolling; Before rolling steel roll temperature is measured, all, be higher than the toughness-brittle transition temperature of Special Alloy Steel, obviously improved distortion plasticity, greatly reduce strip edge portion and the probability that the limit is split occurs, ensured normal rolling more than 70 ℃;
D, last carries out anneal.
As improvement, adopt hydrogen to do shielding gas in the described preheating insulation process, to strengthen thermal conduction effect.
As preferably, described preheating temperature is 200 ± 10 ℃, and the preheating insulation time is 4 hours.
Improve, described transportation by lighter rolling time was controlled in 30 minutes again.
Compared with prior art, advantage of the present invention is:
1) the present invention utilizes existing stainless-steel cold-rolling production equipment bell furnace to carry out preheating insulation, needn't do special transformation and newly added equipment, can satisfy the production demand, has saved investment greatly, has shortened the equipment construction cycle, has improved production efficiency;
2) same steam, water-bath preheating are compared, and are accurately controlled easily with bell furnace preheating insulation temperature, and preheating insulation is more even, help reducing limit in the operation of rolling and split and guarantee the rolling thickness control accuracy, use simple and safe environmental protection;
3) transportation by lighter in time of the coil of strip behind the preheating insulation is rolling, time was controlled in 30 minutes, the toughness and the plasticity of steel alloy have been improved greatly, reduced the probability that the limit is split, even can reduce more than 80%, improve benefit, can be applicable to need to produce the producer of Special Alloy Steel and without preheating lagging facility, greatly the progress of faster production Special Alloy Steel.
Embodiment
Come by the following examples to be further described.
A kind of preheating insulation production technique of Special Alloy Steel, concrete steps are as follows:
A, will cut edge after the pickling of raw material casting skin coil of strip, remove the oxide skin on surface;
B, the coil of strip after pickling cut edge adopt bell furnace to carry out preheating insulation, and preheating temperature is controlled to be 200 ± 10 ℃, soaking time 4 hours; Use H simultaneously
2Do shielding gas,, guaranteed that coil of strip heats up and pre-heat effect as early as possible, has avoided the coil of strip oxidation and rusting again to strengthen thermal conduction effect;
C, with the coil of strip behind the preheating insulation lighter the back rolling; Time was controlled in 30 minutes, steel roll temperature was measured before rolling, all more than 70 ℃, toughness-the brittle transition temperature that is higher than Special Alloy Steel, obviously improved distortion plasticity, greatly reduced strip edge portion and the probability that the limit is split occurs, ensured normal rolling;
D, last carries out anneal.
When producing these hardness height, fragility is big, plasticity is low Special Alloy Steel, the preheating insulation production link that is absolutely necessary, the purpose of preheating insulation and effect mainly contain following aspect:
1) by preheating insulation, make coil of strip have certain temperature, reduce toughness-fragility and change tendency, improve plasticity, it is rolling to be convenient to gross distortion, and strip edge portion the limit can not occur and abnormal conditions such as splits simultaneously;
2) by preheating insulation, the unrelieved stress in the time of can reducing the side cut of limit portion, tendency is split on the limit that reduces greatly in the operation of rolling, guarantees rolling smooth.
Preheating temperature is generally 100～200 ℃ (preheating temperature can not be too high, as too high, the easy oxidation and rusting of coil of strip then), is incubated several hours, and coil of strip temperature before rolling will be guaranteed at least more than 50 ℃.Through overtesting, the bell furnace equipment that uses stainless steel to produce, when carrying out the low-temperature prewarming processing, precision is higher, can satisfy the requirement of Special Alloy Steel fully.Same steam, water-bath preheating are compared, and have following technical characterstic with the bell furnace preheating insulation:
(1), temperature accurately controlled easily, uses H in addition
2Do shielding gas, thermal conduction is very fast, and the preheating insulation of coil of strip each several part is more even, helps reducing limit in the operation of rolling and splits and guarantee the rolling thickness control accuracy;
(2), need not increase new primary heater unit, directly do not utilize existing unit.Compare with steam preheating, saved investment, shortened the construction period; Compare with the water-bath preheating, no water-bath preheating influences site environment, is easy to generate shortcomings such as potential safety hazard.
By contrast, the bell furnace preheating insulation has steam, the incomparable superiority of water-bath preheating insulation, and is on-the-spot simple and practical reliable.Adopt production technique of the present invention that Special Alloy Steel is carried out preheating insulation, obtained effect preferably, having reduced the limit splits, need not transform and newly added equipment, make full use of existing stainless-steel cold-rolling and produce unit, saved investment greatly, and shortened the equipment construction cycle (as building vaporium, at least need the time about half a year), Special Alloy Steel is produced in advance.Facts have proved: this method is simple and practical reliable.
Claims (5)
1. the preheating insulation production method of a Special Alloy Steel is characterized in that may further comprise the steps:
A, will cut edge after the pickling of raw material casting skin coil of strip;
B, employing bell furnace carry out preheating insulation, and preheating temperature is 100～200 ℃, soaking time 2～6 hours;
C, with the coil of strip behind the preheating insulation lighter the back rolling;
D, anneal.
2. preheating insulation production method according to claim 1 is characterized in that adopting in the described preheating insulation process hydrogen to do shielding gas.
3. preheating insulation production method according to claim 1 and 2 is characterized in that 200 ± 10 ℃ of described preheating temperatures.
4. preheating insulation production method according to claim 1 and 2 is characterized in that the described preheating insulation time is 4 hours.
5. preheating insulation production method according to claim 1 and 2 is characterized in that described transportation by lighter rolling time was controlled in 30 minutes, makes rolling preceding steel roll temperature be higher than the toughness-brittle transition temperature of Special Alloy Steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010101351115A CN102199696A (en) | 2010-03-25 | 2010-03-25 | Production method for preheating and insulating special alloy steel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101351115A CN102199696A (en) | 2010-03-25 | 2010-03-25 | Production method for preheating and insulating special alloy steel |
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| CN102199696A true CN102199696A (en) | 2011-09-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114453430A (en) * | 2022-01-20 | 2022-05-10 | 安阳钢铁股份有限公司 | Control method for preventing high magnetic induction oriented silicon steel cold rolling strip breakage |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0619376A1 (en) * | 1993-04-05 | 1994-10-12 | Thyssen Stahl Aktiengesellschaft | Method for manufacturing grain oriented electrical sheets with improved core loss |
| CN101240363A (en) * | 2008-03-10 | 2008-08-13 | 贾会平 | Combined hood-type furnace annealing method and annealing furnace device thereof |
| CN101492786A (en) * | 2008-01-23 | 2009-07-29 | 北京中钢贸科技发展有限公司 | Method for producing non-oriented silicon steel |
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2010
- 2010-03-25 CN CN2010101351115A patent/CN102199696A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0619376A1 (en) * | 1993-04-05 | 1994-10-12 | Thyssen Stahl Aktiengesellschaft | Method for manufacturing grain oriented electrical sheets with improved core loss |
| CN101492786A (en) * | 2008-01-23 | 2009-07-29 | 北京中钢贸科技发展有限公司 | Method for producing non-oriented silicon steel |
| CN101240363A (en) * | 2008-03-10 | 2008-08-13 | 贾会平 | Combined hood-type furnace annealing method and annealing furnace device thereof |
Non-Patent Citations (2)
| Title |
|---|
| 卢绍海: "硅钢厂技术改造中的新技术与经济效益", 《武钢技术》, no. 9, 31 December 1987 (1987-12-31) * |
| 马普生等: "鞍钢开发冷轧电工钢的探讨", 《鞍钢技术》, no. 2, 31 December 2002 (2002-12-31) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114453430A (en) * | 2022-01-20 | 2022-05-10 | 安阳钢铁股份有限公司 | Control method for preventing high magnetic induction oriented silicon steel cold rolling strip breakage |
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Application publication date: 20110928 |