CN101353756A - Cold rolling high strength steel plate for porcelain enamel and manufacturing method thereof - Google Patents
Cold rolling high strength steel plate for porcelain enamel and manufacturing method thereof Download PDFInfo
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- CN101353756A CN101353756A CNA200710093965XA CN200710093965A CN101353756A CN 101353756 A CN101353756 A CN 101353756A CN A200710093965X A CNA200710093965X A CN A200710093965XA CN 200710093965 A CN200710093965 A CN 200710093965A CN 101353756 A CN101353756 A CN 101353756A
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Abstract
The invention provides a cold rolled high strength steel sheet used for porcelain enamel; the steel sheet is characterized by comprising the following chemical composition (weight percent): C: less than or equal to 0.15, Si: less than or equal to 1.0, Mn: less than or equal to 0.5 to 2.0, P: less than or equal to 0.05, S: less than or equal to 0.05, Al: 0.01 to 0.10, N: 0.008-0.015, Ti: less than or equal to 0.05, V: 0.02 to 0.2, and the rest are residual elements and Fe. The invention also provides a production method of the steel sheet which has the advantages of higher strength, good plasticity and weldability, good fish scaling resistance, and porcelain enamel adherence, and meets the processing requirements of forming, welding, enameling and the like of the porcelain enamels, so as to maintain higher strength of the products after enamel firing. The steel sheet can be applied to producing enamel products of building panels, chemical products, kitchen wares, sanitary fittings and the like and can also be popularized to the production of other porcelain enamels.
Description
Technical field
The invention belongs to field of iron and steel, particularly, the present invention relates to enamel with the cold rolling high strength steel ferrous materials.
Background technology
Enameling sheet is being brought into play crucial effect in national economy, very close with people's relation in industrial production and daily life, be widely used in industries such as light industry, household electrical appliances, metallurgy, chemical industry, building, make kitchen utensils, sanitary ware, oven, water heater liner, building fancy face plate, chemical reaction jar or the like.
The kind of enameling sheet is a lot, by the production technique branch hot-rolled sheet (acid-cleaning plate), cold-reduced sheet and coating plate etc. is arranged; Divide once enamel and twice enamel, single face enamel and counterenamel, wet-process enameling and electrostatic dry powder enamel etc. by enamel technology.The performance requriements of enameling sheet mainly comprises aspects such as intensity, plasticity, scaling resistance, adherence and weldability, and the enameling sheet of different purposes requires to possess different over-all propertieies.Wherein, scaling resistance can be one of enameling sheet the most basic due, most important performance index.Cause enamelware to produce that squama is quick-fried to be caused by hydrogen, hydrogen mainly enters steel plate in pickling and enamel firing process.If hydrogen spreads slowly in steel plate, the hydrogen that enters under identical enamel technology in the steel plate is just few, and this will help preventing that the squama of enamelware is quick-fried.So, except improving enamel technology, also should improve the scaling resistance energy of steel plate itself.Crystal boundary in the steel, dislocation, hole, inclusion and separate out to equate it all is good hydrogen trap at different enamel purposes, need to adjust the composition and the production technique of steel, in guaranteeing just enough hydrogen traps are arranged, and realize good scaling resistance energy.
At present relevant enamel has following relevant patent/patent application with cold rolling high-strength steel and manufacture method thereof, sees Table 1 and table 2.
The chemical ingredients (wt%) of the relevant cold-rolled high-strength Glassed Steel patent of table 1
The technology of the relevant high strength enamel steel patent/patent application of table 2 relatively
From table 1 and table 2 as can be seen, the disclosed technical scheme of each patent documentation method of mainly taking to add silicon, manganese and copper in soft steel improves the intensity of steel plate.Silicon and manganese are the strengthening elements of using always, and the precipitation strength of copper can significantly improve the intensity of steel.Add the scaling resistance that alloying elements such as titanium, niobium and boron not only can improve the intensity of steel plate but also can improve steel plate, titanium can combine with carbon, nitrogen and sulphur and form compound, thereby improve the scaling resistance energy of steel, same niobium and boron also combine the formation compound and play a part to improve the scaling resistance energy with carbon and nitrogen.
It is few to rely on nitrogen and vanadium to improve the patent of intensity and scaling resistance in the patent of being retrieved, US5906690 is only arranged at present, the disclosed technical scheme of the document is to adopt the method that adds titanium or vanadium or niobium or zirconium, the add-on of alloy is pressed Ti or V 〉=3N, or the method for Nb or Zr 〉=6N, nitrogen content≤0.008% wherein, the intensity of finished product steel plate is 200-420MPa.
The present inventor reduces the add-on of alloying element by constantly groping, and adjusts manufacture method, finally obtains a kind of cold rolling high strength steel plate for porcelain enamel, thereby has finished the present invention.
Therefore, first purpose of the present invention is to provide a kind of cold rolling high strength steel plate for porcelain enamel.
Second purpose of the present invention is to provide the manufacture method of this cold rolling high strength steel plate for porcelain enamel.
Summary of the invention
One aspect of the present invention provides a kind of cold rolling high strength steel plate for porcelain enamel, and described steel plate comprises following chemical ingredients (wt%): carbon≤0.15, silicon≤1.0, manganese 0.5～2.0, phosphorus≤0.05, sulphur≤0.05, aluminium 0.01～0.10, nitrogen 0.008～0.015, titanium≤0.05, vanadium 0.02～0.2, all the other are residual element and iron.
More than the effect of each chemical ingredients as follows:
Carbon: carbon is the key element of guaranteeing intensity that steel plate is decided, and the carbon amount increases, and intensity rises, and plasticity descends.Carbon generates second particle mutually with vanadium, titanium respectively.Be plasticity, weldability and the application of slip of guaranteeing steel plate, carbon content is not higher than 0.15%.When carbon content was higher than 0.15%, not only the plasticity of steel reduced, and can produce a large amount of bubble infringement enamel quality in the enamel process.
Manganese: the purpose that adds manganese mainly is to improve the intensity of steel, but the manganese too high levels can the serious plasticity that reduces steel, manganese in steel also and aluminium play the effect of deoxidation jointly.
Vanadium and nitrogen: vanadium at first combines with carbon then with nitrogen after the high temperature hot rolling, separates out VN and VC etc. in a large number, and these second phase particles play a part precipitation strength, and are effectively to store hydrogen trap, can prevent the generation that squama is quick-fried in the enamel process.When the nitrogen content in the steel was higher, vanadium mainly combined with nitrogen, separates out comparatively stable VN particle in high temperature, had good strengthening effect and the quick-fried effect of anti-squama.
Adopt the advantage that adds vanadium to be in the composition design: the solubleness of V (CN) is big, especially at high temperature, this means that its solvent temperature can last till lower temperature, can dissolve much higher V in other words under given temperature.With Nb similar to Ti on the contrary mutually be, VC and VN solid solubility differ greatly, the solid solubility of VN is long-pending, and VN is better than VC and forms in advance than about low two orders of magnitude of VC, therefore adding N can strengthen their precipitation strength effect effectively.Because at high temperature the solubleness of V (CN) is big in the vanadium nitrogen steel, usually take the rolling method of high temperature recrystallize, rolling deformation has increased the forming core of separating out of V (CN), make V (CN) after rolling, just separate out in large quantities, also help forming V (CN) particle of small and dispersed more, both guaranteed the precipitation strength effect of precipitated phase, reduced the hot rolled rolling load again matrix, shortened rolling time, the quick-fried effect of anti-squama that V (CN) particle of while small and dispersed helps improving steel plate.Increase N content and can reduce the add-on of V to a certain extent and reach same strengthening effect, also saved vanadium alloy simultaneously.Because titanium is strong nitride forming element, calculate as can be known according to solubility product, nitrogen in steel combines with titanium earlier, just combine then with vanadium, so the nitrogen of capacity must be arranged in the steel, could guarantee to combine and form VN and V (CN) with vanadium, therefore design nitrogen content in the steel more than or equal to 0.008%.
Titanium: the titanium that adds trace in the steel can produce a kind of small and dispersed and distribute and very stable TiN particle, and it both can prevent the high temperature austenite grain coarsening effectively, all is very favourable to intensity, plasticity, scaling resistance and the weldability that guarantees steel again.When titanium content surpasses 0.05%, because nitrogen in steel content height, can when high-temperature very, separate out TiN, and the TiN particle is thick, the plasticity and the surface quality of infringement steel plate.
Aluminium: be strong deoxidant element.Low as far as possible for guaranteeing the oxygen level in the steel, the content of aluminium is controlled at 0.01～0.10%.
Another aspect of the present invention provides the manufacture method of this cold rolling high strength steel plate for porcelain enamel, comprises smelting, casting, hot rolling, cold rolling, annealing, and wherein in hot rolling technology, Heating temperature is 1100-1300 ℃.
This manufacture method provided by the invention, one preferred embodiment is, in hot rolling technology, finishing temperature is 800～1050 ℃.
This manufacture method provided by the invention, one preferred embodiment is, in hot rolling technology, cools off preferably segmented water-cooled, rate of cooling is 15～45 ℃/s.
This manufacture method provided by the invention, one preferred embodiment is, in hot rolling technology, carries out air cooling before and after the preferred water-cooled of segmentation water-cooled, the rate of cooling of water-cooled is 15～45 ℃/s.
This manufacture method provided by the invention, one preferred embodiment is, in hot rolling technology, coiling temperature is 550～750 ℃.
This manufacture method provided by the invention, one preferred embodiment is, in cold-rolling process, cold rolling total draft is greater than 50%.
This manufacture method provided by the invention, one preferred embodiment is, in annealing process, annealing temperature is 550～850 ℃.
This manufacture method provided by the invention, one preferred embodiment is, in annealing process, annealing way is continuous annealing or bell-type annealing.
Generally speaking, details are as follows for production process:
Bessemerize and vacuum-treat: purpose is to guarantee the basal component requirement of molten steel, removes the obnoxious flavoures such as hydrogen in the steel, and adds necessary alloying element such as vanadium, titanium, nitrogen, carries out the adjustment of alloying element.
Continuous casting or die casting: guarantee that all even surface quality of strand internal component is good, the steel ingot of die casting need be rolled into steel billet.
Hot rolling: continuously cast bloom or steel billet obtain uniform austenitizing tissue on the one hand at 1100～1300 ℃ of temperature range internal heating, and the compound of vanadium and titanium is partly or entirely dissolved.More than Ar3, promptly finish hot rolling in 800～1050 ℃ the temperature range subsequently, adopt controlled chilling to coiling temperature then, cooling can the segmentation water-cooled, carries out air cooling before and after the water-cooled, and the rate of cooling of water-cooled is 15～45 ℃/s.Coiling temperature is 550～750 ℃.In hot rolling and process of cooling, vanadium and titanium can be separated out with the form of compound, are the small and dispersed state and are evenly distributed in the matrix.Obtain refinement by the ferritic structure in the controlled chilling steel simultaneously.
Cold rolling: steel plate carries out cold rolling, cold rolling total draft more than 50% after methods such as pickling or ball blast are removed iron scale, guarantees to store in steel enough deformation energies, finishes recrystallize like this when annealing.Annealing can be adopted the mode of continuous annealing or bell-type annealing, and annealing temperature is 550～850 ℃, and annealing process guarantees that steel plate finishes recrystallize and grain growth.
In sum, the present inventor adds the vanadium of an amount of manganese, certain content and the titanium elements of trace in smelting steel and Vacuum Degassing Process, increases the content of nitrogen and elements such as strict control nitrogen, sulphur and carbon; Control second quantity and the size of particle (VN, VC, V (CN) and TiN etc.) mutually of vanadium and titanium by the high temperature recrystallize is rolling with controlled chilling.
The scope of carbon, manganese, vanadium, titanium and nitrogen had both determined the intensity rank of steel in the steel, had also determined the plasticity and the application of slip of steel.The content range of elements such as control vanadium, titanium, carbon, nitrogen and sulphur, substantially determined the content of the second phase particle in the steel, by control hot rolling technology and rate of cooling, guarantee that vanadium and titanium generate second particle mutually of small and dispersed in steel, thus the scaling resistance and the adherence of raising steel plate.Simultaneously the second phase particle of small and dispersed is separated out and is helped strengthening matrix, and control hot rolling technology and rate of cooling can thinning microstructures, improves the intensity and the plasticity of steel plate.
Beneficial effect:
Cold rolling high strength steel plate for porcelain enamel provided by the invention has higher intensity, good plasticity, weldability, good scaling resistance and enamel adherence, satisfy the processing requests such as shaping, welding, enamel of enamelware, still keeping higher intensity through goods after the enamel firing.Can be applicable to make enamelwares such as building panel, Chemicals, kitchen tools, sanitary equipment, and can promote the use of the production of other enamelwares.
Embodiment
The present invention is further elaborated with embodiment below, but these embodiment have any restriction to the present invention absolutely not.Any change that those skilled in the art are done in to the invention process under the enlightenment of this specification sheets all will drop in the scope of claims.
Embodiment 1
By smelting, casting, hot rolling, cold rolling and annealing steps, the Finished Steel that acquisition has the chemical ingredients of being described in table 3 below, wherein processing parameter and end properties are seen as following table 3.
The chemical ingredients (wt%) of table 3 embodiment 1 steel
Embodiment 2
By smelting, casting, hot rolling, cold rolling and annealing steps, the Finished Steel that acquisition has the chemical ingredients of being described in table 4 below, wherein processing parameter and end properties are seen as following table 4.
The chemical ingredients (wt%) of table 4 embodiment 2 steel
Embodiment 3
By smelting, casting, hot rolling, cold rolling and annealing steps, the Finished Steel that acquisition has the chemical ingredients of being described in table 5 below, wherein processing parameter and end properties are seen as following table 5.
The chemical ingredients (wt%) of table 5 embodiment 3 steel
Embodiment 4
By smelting, casting, hot rolling, cold rolling and annealing steps, the Finished Steel that acquisition has the chemical ingredients of being described in table 6 below, wherein processing parameter and end properties are seen as following table 6.
The chemical ingredients (wt%) of table 6 embodiment 4 steel
Embodiment 5
By smelting, casting, hot rolling, cold rolling and annealing steps, the Finished Steel that acquisition has the chemical ingredients of being described in table 7 below, wherein processing parameter and end properties are seen as following table 7.
The chemical ingredients (wt%) of table 7 embodiment 5 steel
Embodiment 6
By smelting, casting, hot rolling, cold rolling and annealing steps, the Finished Steel that acquisition has the chemical ingredients of being described in table 8 below, wherein processing parameter and end properties are seen as following table 8.
The chemical ingredients (wt%) of table 8 embodiment 6 steel
Embodiment 7
By smelting, casting, hot rolling, cold rolling and annealing steps, the Finished Steel that acquisition has the chemical ingredients of being described in table 9 below, wherein processing parameter and end properties are seen as following table 10.
The chemical ingredients (wt%) of table 9 embodiment 7 steel
Used processing parameter of each embodiment of table 10 and end properties
Industrial applicibility
Enamel cold rolling high strength steel provided by the invention, its stable components and be easy to control, hot rolling load is low, therefore To the strong adaptability of hot-rolling mill, cold rolling unit need possess bigger rolling power, and is also stronger to the adaptability of annealing process, On the whole this enamel provided by the invention have stronger commercial Application with cold rolling high strength steel and manufacture method thereof can The row property has broad application prospects.
Claims (9)
1. cold rolling high strength steel plate for porcelain enamel, it is characterized in that, comprise following chemical ingredients (wt%): carbon≤0.15, silicon≤1.0, manganese 0.5～2.0, phosphorus≤0.05, sulphur≤0.05, aluminium 0.01～0.10, nitrogen 0.008～0.015, titanium≤0.05, vanadium 0.02～0.2, all the other are residual element and iron.
2. the manufacture method of the described cold rolling high strength steel plate for porcelain enamel of claim 1 comprises smelting, casting, hot rolling, cold rolling, annealing, and it is characterized in that: in the hot rolling technology, Heating temperature is 1100～1300 ℃.
3. manufacture method as claimed in claim 2, the finishing temperature in the wherein said hot rolling technology are 800～1050 ℃.
4. manufacture method as claimed in claim 2, the segmentation water-cooled is selected in the cooling in the wherein said hot rolling technology for use, and rate of cooling is 15～45 ℃/s.
5. manufacture method as claimed in claim 4, wherein said segmentation water-cooled are carried out air cooling before and after selecting water-cooled for use, and the rate of cooling of water-cooled is 15～45 ℃/s.
6. manufacture method as claimed in claim 2, the coiling temperature in the wherein said hot rolling technology are 550～750 ℃.
7. manufacture method as claimed in claim 2, the cold rolling total draft in the wherein said cold-rolling process is greater than 50%.
8. manufacture method as claimed in claim 2, the annealing temperature in the wherein said annealing process are 550～850 ℃.
9. manufacture method as claimed in claim 2, the annealing way in the wherein said annealing process are continuous annealing or bell-type annealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710093965XA CN101353756A (en) | 2007-07-23 | 2007-07-23 | Cold rolling high strength steel plate for porcelain enamel and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710093965XA CN101353756A (en) | 2007-07-23 | 2007-07-23 | Cold rolling high strength steel plate for porcelain enamel and manufacturing method thereof |
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| CN101353756A true CN101353756A (en) | 2009-01-28 |
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| CNA200710093965XA Pending CN101353756A (en) | 2007-07-23 | 2007-07-23 | Cold rolling high strength steel plate for porcelain enamel and manufacturing method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747309A (en) * | 2012-07-27 | 2012-10-24 | 宝山钢铁股份有限公司 | Steel for enamel and production method thereof |
| CN102787215A (en) * | 2011-05-19 | 2012-11-21 | 宝山钢铁股份有限公司 | Method for RH nitrogen-increasing control of glassed steel |
| CN102828115A (en) * | 2012-09-25 | 2012-12-19 | 鞍钢股份有限公司 | Q345B medium steel plate and production method thereof |
| CN102899565A (en) * | 2011-07-25 | 2013-01-30 | 宝山钢铁股份有限公司 | Steel for cold rolling enamel, and manufacturing method thereof |
| CN106560523A (en) * | 2015-10-06 | 2017-04-12 | Posco公司 | Porcelain Anamel Steel Sheet And Manufacturing Method Thereof |
| CN107012308A (en) * | 2010-12-27 | 2017-08-04 | 株式会社神户制钢所 | The manufacture method and steel wire rod of steel wire rod |
| CN113025907A (en) * | 2021-03-09 | 2021-06-25 | 马鞍山钢铁股份有限公司 | Cold-rolled enameled steel plate for anti-pressing and anti-explosion porcelain water heater liner and production method thereof |
-
2007
- 2007-07-23 CN CNA200710093965XA patent/CN101353756A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107012308A (en) * | 2010-12-27 | 2017-08-04 | 株式会社神户制钢所 | The manufacture method and steel wire rod of steel wire rod |
| CN102787215A (en) * | 2011-05-19 | 2012-11-21 | 宝山钢铁股份有限公司 | Method for RH nitrogen-increasing control of glassed steel |
| CN102899565A (en) * | 2011-07-25 | 2013-01-30 | 宝山钢铁股份有限公司 | Steel for cold rolling enamel, and manufacturing method thereof |
| CN102747309A (en) * | 2012-07-27 | 2012-10-24 | 宝山钢铁股份有限公司 | Steel for enamel and production method thereof |
| WO2014015823A1 (en) * | 2012-07-27 | 2014-01-30 | 宝山钢铁股份有限公司 | Ceramic-enameling steel and manufacturing method therefor |
| CN102828115A (en) * | 2012-09-25 | 2012-12-19 | 鞍钢股份有限公司 | Q345B medium steel plate and production method thereof |
| CN106560523A (en) * | 2015-10-06 | 2017-04-12 | Posco公司 | Porcelain Anamel Steel Sheet And Manufacturing Method Thereof |
| CN106560523B (en) * | 2015-10-06 | 2018-06-26 | Posco公司 | Enamel cold-rolled steel sheet and its manufacturing method |
| CN113025907A (en) * | 2021-03-09 | 2021-06-25 | 马鞍山钢铁股份有限公司 | Cold-rolled enameled steel plate for anti-pressing and anti-explosion porcelain water heater liner and production method thereof |
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Open date: 20090128 |