CN109881115A - A kind of Ti microalloying gapless atomic steel and its manufacturing method - Google Patents
A kind of Ti microalloying gapless atomic steel and its manufacturing method Download PDFInfo
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- CN109881115A CN109881115A CN201910208564.7A CN201910208564A CN109881115A CN 109881115 A CN109881115 A CN 109881115A CN 201910208564 A CN201910208564 A CN 201910208564A CN 109881115 A CN109881115 A CN 109881115A
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- microalloying
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Abstract
The invention discloses a kind of Ti microalloying gapless atomic steel and its manufacturing methods.Wherein, the Ti microalloying gapless atomic steel, by weight percentage, comprising: C:0~0.0040%, Mn:0.05~0.6%, Al:0.01~0.08%, Ti:0.01~0.08%, constraint element Si≤0.06%, P≤0.02%, S≤0.01%, N≤0.005%, remaining is Fe.Requirement present invention accomplishes thin gauge hot rolling ultra-low-carbon steel to process conditions and mechanical property.
Description
Technical field
The present invention relates to technical field of steel rolling more particularly to a kind of Ti microalloying gapless atomic steel and its manufacturers
Method.
Background technique
In recent years, the demand of thin gauge hot rolled plate substitution cold-reduced sheet is growing day by day, and " with hot Dai Leng " is a kind of development trend.
Thin gauge hot rolled plate can be divided into two class of mild steel and ultra-low-carbon steel.According to purposes, thin gauge ultra-low-carbon steel hot rolled plate finished product state
Including bare board volume, pickling coiled sheet and hot galvanizing coiled sheet.Thin gauge hot rolled plate be chiefly used in manufacture refrigeration compressor, power distribution cabinet,
Switchgear, electric control cabinet, farm machinery, agricultural vehicle, water heater, cold-rolled forming section etc..According to market analysis forecast the result shows that,
15~20% in cold-rolled steel sheet of the thickness less than 2.0mm can be replaced with thin gauge hot rolled plate.The prediction of steel and iron industry association, I
About 1000~1500 tons of demand of state annual " with hot Dai Leng ".Thin gauge hot rolled plate is with its higher added value and extremely by city
The favor of field.
And use general producing line and production technology, it is difficult to meet thin gauge hot rolling ultra-low-carbon steel to process conditions and mechanical property
The requirement of energy.
Summary of the invention
The present invention solves in the prior art by providing a kind of Ti microalloying gapless atomic steel and its manufacturing method
It is difficult to meet requirement of the thin gauge hot rolling ultra-low-carbon steel to process conditions and mechanical property using general producing line and production technology
Technical problem.
The present invention provides a kind of Ti microalloying gapless atomic steels, by weight percentage, comprising: and C:0~
0.0040%, Mn:0.05~0.6%, Al:0.01~0.08%, Ti:0.01~0.08%, constraint element Si≤0.06%, P
≤ 0.02%, S≤0.01%, N≤0.005%, remaining is Fe.
The present invention also provides a kind of manufacturing methods of Ti microalloying gapless atomic steel, comprising:
The slab for meeting Composition Control range out is smelted according to the ingredient of such as above-mentioned Ti microalloying gapless atomic steel；
The slab is heated；
Slab after heating is rolled, Ti microalloying gapless atomic steel is obtained.
It is further, described to heat the slab, comprising:
The slab is heated to 1050~1250 DEG C from room temperature.
Further, it is described the slab is heated to 1050~1250 DEG C from room temperature after, further includes:
Slab after heating is kept the temperature 1~4 hour.
Further, the slab after described pair of heating rolls, comprising:
Roughing and finish rolling are successively carried out to the slab after the heat preservation.
Further, between the roughing and the finish rolling, slab is cooled down.
Further, it is described slab is cooled down during, by cooling rate control in 2~15 DEG C/s.
Further, in the rough rolling process, guarantee that roughing outlet temperature is not less than 900 DEG C, workpiece thickness 30
~50mm, roughing reduction ratio are 50~85%.
Further, in the finishing stands, the slab is lubricated, is guaranteed between roll and the slab
Lubricating coefficient is less than 0.15.
Further, in the finishing stands, finish rolling total reduction is 60~95%.
One or more technical solution provided in the present invention, has at least the following technical effects or advantages:
It is designed by the constituent to steel plate, carries out finish rolling after steel plate group knits and is completely transformed into ferrite, have
Effect reduces the resistance of deformation of the operation of rolling, makes steel plate that dynamic recrystallization sufficiently occur, and has and is produced than pair rolling technique
The bigger crystallite dimension of steel plate out makes steel plate have lower yield tensile ratio, thus efficiently solves in the prior art using one
As producing line and production technology be difficult to meet the technology of requirement of the thin gauge hot rolling ultra-low-carbon steel to process conditions and mechanical property and ask
Topic.
Detailed description of the invention
Fig. 1 is the flow chart of the manufacturing method of Ti microalloying gapless atomic steel provided in an embodiment of the present invention.
Specific embodiment
The embodiment of the present invention solves existing by providing a kind of Ti microalloying gapless atomic steel and its manufacturing method
It is difficult to meet thin gauge hot rolling ultra-low-carbon steel to process conditions and mechanical property using general producing line and production technology in technology
It is required that the technical issues of.
Technical solution in the embodiment of the present invention is to solve the above problems, general thought is as follows:
It is designed by the constituent to steel plate, carries out finish rolling after steel plate group knits and is completely transformed into ferrite, have
Effect reduces the resistance of deformation of the operation of rolling, makes steel plate that dynamic recrystallization sufficiently occur, and has and is produced than pair rolling technique
The bigger crystallite dimension of steel plate out makes steel plate have lower yield tensile ratio.In addition, slab heating temperature low in the operation of rolling
And final rolling temperature, it is too fast to solve the problems, such as that conventional austenitic area rolling process thin specification steel plate temperature reduces, thus have
Effect, which solves, is difficult to meet thin gauge hot rolling ultra-low-carbon steel to process conditions using general producing line and production technology in the prior art
The technical issues of with the requirement of mechanical property.
Above-mentioned technical proposal in order to better understand, in conjunction with appended figures and specific embodiments to upper
Technical solution is stated to be described in detail.
Ti microalloying gapless atomic steel provided in an embodiment of the present invention, by weight percentage, comprising: C:0~
0.0040%, Mn:0.05~0.6%, Al:0.01~0.08%, Ti:0.01~0.08%, constraint element Si≤0.06%, P
≤ 0.02%, S≤0.01%, N≤0.005%, remaining is Fe.
Referring to Fig. 1, the manufacturing method of Ti microalloying gapless atomic steel provided in an embodiment of the present invention, comprising:
Step S110: it is smelted according to the ingredient of above-mentioned Ti microalloying gapless atomic steel and meets Composition Control range out
Slab；
Step S120: slab is heated；
This step is specifically described, step S120 includes:
1050~1250 DEG C will be heated to from room temperature with a thickness of the slab of 200~250mm.
In the present embodiment, room temperature is 25 DEG C.
In order to make the tissue complete austenitizing in slab, and make alloying element more uniformization, by slab from room temperature
It is heated to after 1050~1250 DEG C, further includes:
Slab after heating is kept the temperature 1~4 hour.
Specifically insulating process includes:
Slab is come out of the stove after preheating, a heating, two heating and soaking in heating furnace, guarantees that total heating time is 1
~4 hours.
Step S130: rolling the slab after heating, obtains Ti microalloying gapless atomic steel.
This step is specifically described, step S130 includes:
Roughing and finish rolling are successively carried out to the slab after heat preservation.
It is right between roughing and finish rolling in order to make the tissue of the steel plate after roughing be completely transformed into ferrite by austenite
Slab carries out air-cooled cooling.
In order to improve the uniformity in steel plate width direction and length direction tissue and performance, and reduce steel plate edge defect hair
Raw probability, the temperature drop end to end of the edge and length direction that need to guarantee the steel plate width direction in cooling procedure is in reasonable model
In enclosing.By setting roughing rolling pass number and roughing de-scaling passage, during being cooled down to slab, by cooling rate
Control is in 2~15 DEG C/s.
In order to complete the roughing of steel plate in austenitic area, in rough rolling process, pass through controlled rolling passage and de-scaling road
Secondary, by temperature monitoring to guarantee roughing outlet temperature not less than 900 DEG C, workpiece thickness is 30~50mm, roughing reduction ratio
It is 50~85%.
In order to improve the structural homogenity of operation of rolling steel plate thickness direction, in finishing stands, slab is lubricated,
Guarantee the coefficient of friction between roll and slab less than 0.15.
Specifically, friction coefficient μ is calculated by formula (1).
Wherein, α is nip angle, and h is roll gap, SfIt is advancing slip amount, R is roller diameter.
By controlling nip angle α, roll gap h, advancing slip amount SfAnd/or roller diameter R can control friction coefficient μ, to guarantee to rub
Coefficient is wiped less than 0.15.
In the present embodiment, include: to the process that slab is lubricated
Investment lubricates in each finishing rolling mill, calculates the coefficient of friction between roll and slab by formula (1).
In order to guarantee that dynamic recrystallization sufficiently occurs in finishing stands for steel plate, in finishing stands, finishing temperature 700
~810 DEG C, coiling temperature is 600~750 DEG C, and finish rolling total reduction is 60~95%.
What needs to be explained here is that in order to guarantee that steel plate tissue is completely transformed into ferrite by austenite, when intermediate base temperature
When degree is reduced to 780~880 DEG C, finish rolling is initially entered.
The embodiment of the present invention has studied the mechanical property feature of the Ti microalloying gapless atomic steel of different chemical composition,
Chemical component is shown in Table 1, and the mechanical property of final finished is shown in Table 2.
| Serial number | C | Si | Mn | P | S | Al | Ti | N |
| 1 | 0.0024 | 0.009 | 0.34 | 0.012 | 0.006 | 0.039 | 0.06 | 0.0026 |
| 2 | 0.0032 | 0.010 | 0.26 | 0.011 | 0.007 | 0.042 | 0.03 | 0.0023 |
| 3 | 0.0028 | 0.007 | 0.43 | 0.014 | 0.008 | 0.038 | 0.04 | 0.0022 |
| 4 | 0.0025 | 0.006 | 0.33 | 0.009 | 0.006 | 0.044 | 0.07 | 0.0020 |
| 5 | 0.0035 | 0.008 | 0.44 | 0.013 | 0.009 | 0.048 | 0.06 | 0.0019 |
1 IF steel chemical composition of table
2 IF steel mechanical property of table
By Tables 1 and 2 as it can be seen that according to the embodiment of the present invention requirement, yield tensile ratio can be produced and be about not higher than 0.61, r
Value thin gauge " with hot Dai Leng " gapless atomic steel excellent not less than 2.5 comprehensive mechanical property, i.e., implement through the invention
Example thin gauge " with hot Dai Leng " gapless atomic steel produced has lower yield tensile ratio, higher elongation percentage.
[technical effect]
Reasonable Ti microalloying gapless atomic steel is designed based on ingredient, optimizes hot-rolled process parameter, using low temperature essence
It rolls, it is thin not higher than 3.0mm to produce thickness of the steel plate more generated than common process with more low yield strength ratio, more high-elongation
Specification " with hot Dai Leng " gapless atomic steel, can produce high-elongation and r value is equivalent to common process production cold-reduced sheet r
The thin gauge gapless atomic steel of value meets requirement of the thin gauge hot rolling ultra-low-carbon steel to process conditions and mechanical property.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of Ti microalloying gapless atomic steel, which is characterized in that by weight percentage, comprising: C:0~0.0040%,
Mn:0.05~0.6%, Al:0.01~0.08%, Ti:0.01~0.08%, constraint element Si≤0.06%, P≤0.02%, S
≤ 0.01%, N≤0.005%, remaining is Fe.
2. a kind of manufacturing method of Ti microalloying gapless atomic steel characterized by comprising
It is smelted according to the ingredient of Ti microalloying gapless atomic steel as described in claim 1 and meets Composition Control range out
Slab；
The slab is heated；
Slab after heating is rolled, Ti microalloying gapless atomic steel is obtained.
3. manufacturing method as claimed in claim 2, which is characterized in that described to heat the slab, comprising:
The slab is heated to 1050~1250 DEG C from room temperature.
4. manufacturing method as claimed in claim 3, which is characterized in that it is described the slab is heated to 1050 from room temperature~
After 1250 DEG C, further includes:
Slab after heating is kept the temperature 1~4 hour.
5. manufacturing method as claimed in claim 4, which is characterized in that the slab after described pair of heating rolls, comprising:
Roughing and finish rolling are successively carried out to the slab after the heat preservation.
6. manufacturing method as claimed in claim 5, which is characterized in that between the roughing and the finish rolling, to slab into
Row cooling.
7. manufacturing method as claimed in claim 6, which is characterized in that it is described slab is cooled down during, will be cold
But rate control is in 2~15 DEG C/s.
8. manufacturing method as claimed in claim 5, which is characterized in that in the rough rolling process, guarantee roughing outlet temperature
Not less than 900 DEG C, workpiece thickness is 30~50mm, and roughing reduction ratio is 50~85%.
9. manufacturing method as claimed in claim 5, which is characterized in that in the finishing stands, moisten to the slab
It is sliding, guarantee the lubricating coefficient between roll and the slab less than 0.15.
10. manufacturing method as claimed in claim 5, which is characterized in that in the finishing stands, finish rolling total reduction is 60
~95%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110218946A (en) * | 2019-07-17 | 2019-09-10 | 新余钢铁股份有限公司 | A kind of oil filter ultra-thin shell ultra-low-carbon steel roll bending and its manufacturing method |
| CN112143860A (en) * | 2020-09-10 | 2020-12-29 | 山东钢铁集团日照有限公司 | Production method of 250 MPa-grade high-strength interstitial-free steel |
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| CN101618396A (en) * | 2008-06-30 | 2010-01-06 | 上海梅山钢铁股份有限公司 | Method for rolling interstitial free steel ferrite on traditional hot rolling mills |
| CN102581008A (en) * | 2012-03-01 | 2012-07-18 | 河北钢铁股份有限公司唐山分公司 | Processing method for producing low-cost high-formability IF (interstitial-free) steel |
| CN104046895A (en) * | 2013-06-07 | 2014-09-17 | 攀钢集团攀枝花钢铁研究院有限公司 | Interstitial free steel cold-rolled steel plate and production method thereof |
| CN107597845A (en) * | 2017-10-16 | 2018-01-19 | 北京科技大学 | Ultra-low carbon coil of strip ferrite rolling method and apparatus are used in the punching of endless casting rolling ultra-deep |
| CN109022736A (en) * | 2018-08-06 | 2018-12-18 | 首钢集团有限公司 | A kind of cold-rolling process regulation method of gapless atomic steel continuous annealing thin plate |
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2019
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101618396A (en) * | 2008-06-30 | 2010-01-06 | 上海梅山钢铁股份有限公司 | Method for rolling interstitial free steel ferrite on traditional hot rolling mills |
| CN102581008A (en) * | 2012-03-01 | 2012-07-18 | 河北钢铁股份有限公司唐山分公司 | Processing method for producing low-cost high-formability IF (interstitial-free) steel |
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| CN107597845A (en) * | 2017-10-16 | 2018-01-19 | 北京科技大学 | Ultra-low carbon coil of strip ferrite rolling method and apparatus are used in the punching of endless casting rolling ultra-deep |
| CN109022736A (en) * | 2018-08-06 | 2018-12-18 | 首钢集团有限公司 | A kind of cold-rolling process regulation method of gapless atomic steel continuous annealing thin plate |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110218946A (en) * | 2019-07-17 | 2019-09-10 | 新余钢铁股份有限公司 | A kind of oil filter ultra-thin shell ultra-low-carbon steel roll bending and its manufacturing method |
| CN112143860A (en) * | 2020-09-10 | 2020-12-29 | 山东钢铁集团日照有限公司 | Production method of 250 MPa-grade high-strength interstitial-free steel |
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Application publication date: 20190614 |