CN103468875A - RH treatment method of interstitial free steel - Google Patents
RH treatment method of interstitial free steel Download PDFInfo
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- CN103468875A CN103468875A CN2013103883721A CN201310388372A CN103468875A CN 103468875 A CN103468875 A CN 103468875A CN 2013103883721 A CN2013103883721 A CN 2013103883721A CN 201310388372 A CN201310388372 A CN 201310388372A CN 103468875 A CN103468875 A CN 103468875A
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- Prior art keywords
- steel
- free steel
- oxygen
- low
- interstitial
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 39
- 239000010959 steel Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000001301 oxygen Substances 0.000 claims abstract description 21
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 21
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 14
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims abstract description 13
- 238000005261 decarburization Methods 0.000 claims abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000005275 alloying Methods 0.000 claims abstract description 7
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 5
- 239000010703 silicon Substances 0.000 claims abstract description 5
- 229910052786 argon Inorganic materials 0.000 claims abstract description 4
- 239000004411 aluminium Substances 0.000 claims description 7
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 238000005266 casting Methods 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005097 cold rolling Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 2
- 238000007664 blowing Methods 0.000 abstract 1
- 230000016615 flocculation Effects 0.000 abstract 1
- 238000005189 flocculation Methods 0.000 abstract 1
- 238000007667 floating Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- PZZYQPZGQPZBDN-UHFFFAOYSA-N aluminium silicate Chemical compound O=[Al]O[Si](=O)O[Al]=O PZZYQPZGQPZBDN-UHFFFAOYSA-N 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
An RH treatment method of interstitial free steel is characterized in that the decarburization end point oxygen value is controlled to be 250-500 ppm, 0.08-0.12 kg of low-carbon ferrosilicon/t molten steel is added after the decarburization end point oxygen determination, the oxygen determination is carried out after 3-5 minutes of circulation, and the silicon content of the low-carbon ferrosilicon is 75% -80% according to the oxygen value aluminum alloying. The application range of the RH treatment method of the interstitial free steel is as follows: interstitial free steel with the upper limit of [ Si ] finished products being more than or equal to 0.02 percent; the silicon is less than or equal to 0.008 percent after argon blowing treatment. Compared with the prior art, the invention has the beneficial effects that: the flocculation phenomenon of interstitial-free steel produced by the light and medium sheet billet casting machine reduces the inclusion rate of the steel plate. The cold rolling inclusion defect rate is reduced from 1.12% to 0.56%. The number of the water outlets changed every time of pouring is reduced from 5 to 3 on average. According to the thickness of the casting machine being 170mm and the average width of the casting blank being 1600mm, 1.5m of the casting blank is cut before and after the water gap is replaced. The casting blank cut by the water gap replacement is reduced by =2 × 0.17 × 1.6 × 3 × 7.8=12.73t each time casting is performed.
Description
Technical field
The present invention relates to cast the refining treatment method, especially a kind of RH treatment process of gapless atomic steel.
Background technology
Gapless atomic steel, as the latest generation Punching Steel, has very excellent deep drawability and non-ageing, is widely used as the raw material of the stamping parts such as auto sheet.RH produces gapless atomic steel, at the medium thin slab casting machine, casts.The castability of molten steel is bad, Yi Xuliu.One waters inferior 6 tanks that water at most, needs to change 3～7 soaking water gaps, and serious even causing wadded a quilt with cotton, and flowing breaks waters.Change the mouth of a river because of wadding stream and bring detrimentally affect to the quality product of next procedure, the steel plate inclusion rates is high.
Summary of the invention
The object of the present invention is to provide a kind of RH treatment process of gapless atomic steel, decarburization terminal oxygen value is controlled at 250～500ppm, the decarburization terminal is determined to add 0.08～0.12Kg low-carbon ferrosilicon/t molten steel after oxygen, determines oxygen after circulating 3～5 minutes, according to the oxygen value aluminium alloying.Alleviate the medium thin slab casting machine and produce gapless atomic steel wadding flow phenomenon, reduce the steel plate inclusion rates.Making often to water time quantity of replacing soaking water gap drops to 2～3 times.
For achieving the above object, the present invention realizes by the following technical solutions:
A kind of RH treatment process of gapless atomic steel, is characterized in that, decarburization terminal oxygen value is controlled at 250～500ppm, the decarburization terminal is determined to add 0.08～0.12kg low-carbon ferrosilicon/t molten steel after oxygen, circulate and determine oxygen after 3～5 minutes, according to the oxygen value aluminium alloying, the silicone content of low-carbon ferrosilicon is 75%～80%.
The scope of application of the RH treatment process of described gapless atomic steel: the gapless atomic steel of [Si] finished product upper limit >=0.02%; Argon is processed rear silicon≤0.008%.
Compared with prior art, the invention has the beneficial effects as follows:
Alleviate the medium thin slab casting machine and produce the wadding flow phenomenon of gapless atomic steel, reduce the steel plate inclusion rates.Cold rolling inclusion defect rate is reduced to 0.56% by 1.12%.Often water time replacing mouth of a river quantity and reduce to 3 by average 5.According to casting machine thickness 170mm, strand width average 1600mm, change front and back, the mouth of a river and respectively excise the 1.5m strand.Often water time the strand that reduces because changing mouth of a river excision=2 * 0.17 * 1.6 * 3 * 7.8=12.73t.
Embodiment
A kind of RH treatment process of gapless atomic steel, decarburization terminal oxygen value is controlled at 250～500ppm, the decarburization terminal is determined to add 0.08～0.12Kg low-carbon ferrosilicon/t molten steel after oxygen, circulate and determine oxygen after 3～5 minutes, this time can guarantee the even of molten steel, surpassing this time is all the waste resource from economy and the energy, and the silicone content of low-carbon ferrosilicon is 75%～80%.As high as temperature, can add low-carbon waste steel, according to the oxygen value aluminium alloying.Add al-killed circulation alloying after 3 minutes, after alloying, circulate 5～8 minutes broken empty.The SiO that utilizes the low-carbon ferrosilicon oxidation to generate
2with Al
2o
3reaction generates the macrobead deoxidation productss such as pure aluminium silicate, and this type of deoxidation products is easy to floating, adheres to tiny Al in the process of floating
2o
3inclusion, reach the purpose of purify hot metal.
The scope of application of the RH treatment process of gapless atomic steel: the gapless atomic steel of [Si] finished product upper limit >=0.02%; Argon is processed rear silicon≤0.008%.For the 240t molten steel, low-carbon ferrosilicon amount * the 0.08%+(20 of deoxidized aluminium=determine oxygen value * 0.35 composition aluminium=0.44 * molten steel amount-add～50) be limited to 0.02% steel grade under Kg(finished product Als and get the middle upper limit), 0.08% is the aluminum content of low-carbon ferrosilicon, first tank molten steel composition aluminium coefficient+0.03; After adding low-carbon ferrosilicon, must not heat up.
Claims (2)
1. the RH treatment process of a gapless atomic steel, it is characterized in that, decarburization terminal oxygen value is controlled at 250～500ppm, the decarburization terminal is determined to add 0.08～0.12kg low-carbon ferrosilicon/t molten steel after oxygen, circulate and determine oxygen after 3～5 minutes, according to the oxygen value aluminium alloying, the silicone content of low-carbon ferrosilicon is 75%～80%.
2. the RH treatment process of a kind of gapless atomic steel according to claim 1, is characterized in that, the scope of application of the RH treatment process of described gapless atomic steel: the gapless atomic steel of [Si] finished product upper limit >=0.02%; Argon is processed rear silicon≤0.008%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103883721A CN103468875A (en) | 2013-08-29 | 2013-08-29 | RH treatment method of interstitial free steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103883721A CN103468875A (en) | 2013-08-29 | 2013-08-29 | RH treatment method of interstitial free steel |
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| Publication Number | Publication Date |
|---|---|
| CN103468875A true CN103468875A (en) | 2013-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103883721A Pending CN103468875A (en) | 2013-08-29 | 2013-08-29 | RH treatment method of interstitial free steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103468875A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105714010A (en) * | 2014-12-01 | 2016-06-29 | 鞍钢股份有限公司 | Converter silicon deoxidation method for IF steel and ultra-low carbon steel |
| CN109487034A (en) * | 2019-01-02 | 2019-03-19 | 鞍钢股份有限公司 | Method for producing IF steel by composite deoxidation |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103173588A (en) * | 2013-03-23 | 2013-06-26 | 鞍钢股份有限公司 | RH treatment method of low-silicon aluminum killed steel |
-
2013
- 2013-08-29 CN CN2013103883721A patent/CN103468875A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103173588A (en) * | 2013-03-23 | 2013-06-26 | 鞍钢股份有限公司 | RH treatment method of low-silicon aluminum killed steel |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105714010A (en) * | 2014-12-01 | 2016-06-29 | 鞍钢股份有限公司 | Converter silicon deoxidation method for IF steel and ultra-low carbon steel |
| CN109487034A (en) * | 2019-01-02 | 2019-03-19 | 鞍钢股份有限公司 | Method for producing IF steel by composite deoxidation |
| CN109487034B (en) * | 2019-01-02 | 2020-07-17 | 鞍钢股份有限公司 | Method for producing IF steel by composite deoxidation |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20131225 |
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| RJ01 | Rejection of invention patent application after publication |