CN105710326A - Steel continuous casting method - Google Patents
Steel continuous casting method Download PDFInfo
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- CN105710326A CN105710326A CN201410737331.3A CN201410737331A CN105710326A CN 105710326 A CN105710326 A CN 105710326A CN 201410737331 A CN201410737331 A CN 201410737331A CN 105710326 A CN105710326 A CN 105710326A
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Abstract
The invention provides a steel continuous casting method. By means of the method, segregation-free center-porosity-free casting blanks with high internal quality can be efficiently obtained by striking the casting blanks under proper conditions so as to make the casting blanks vibrate. According to the steel continuous casting method, at least one pair of striking and vibrating devices is arranged on the two sides of the short edge faces of a casting blank containing unset parts when the casting blank with a rectangular cross section is cast through the manufacturing method; while the casting blank is cast, vibration is applied to the casting blank by continuously striking the short edge faces of the casting blank; and by striking the short edge faces, a displacement delta (x) curve of the long edge faces of the casting blank in the thickness direction of the casting blank and intersection points of lines when the displacement delta (x) is equal to 0.10 mm, which are defined in the formula (1) and the formula (2) below, are generated, and the short edge faces are struck by adjusting the vibration energy, the distance between shafts of guide rollers and the unset thickness, so that the distance between the intersection point, away from the original point, of the intersection points and the struck positions of the short edge faces of the casting blank in the width direction of the casting blank is 200 mm or above.
Description
Technical field
The present invention relates to the surface of the strand of a kind of state hit and comprise the portion of solidification and strand is applied vibration while the continuous casing of the steel cast.
Background technology
Pass through to cast continuously the central part of the thickness direction of fluid origin strand and near, it is easy to produce to be referred to as the internal flaw of the gross segregation (macro-segregation: macro-segregation) of center segregation, V-shaped segregation, shaped segregation.Center segregation refers to that C, S, P, Mn etc. are prone to the internal flaw that the solute component (below also referred to as " segregation composition ") of segregation manifests in the final solidification portion multiviscosisty of strand, and V-shaped segregation and shaped segregation are that above-mentioned segregation composition is crowded into V-shaped or inverted v-shaped and the internal flaw that manifests respectively near the final solidification portion of strand.
The product that the strand that these create gross segregation carries out hot-working as raw material is susceptible to toughness decline or hydrogen induced cracking etc., and, when these products are formed final products by cold working, it is easy to crack.It is generally acknowledged that the segregation formation mechanism on strand is as follows: along with the carrying out of solidification, the multiviscosisty between the dendrite arm as the column crystal of solidified structure of segregation composition.The contraction of strand or be referred to as the expansion etc. of the strand swelling (bulging) and flow out between the dendrite arm of column crystal when the molten steel (below also referred to as " multiviscosisty molten steel ") of this segregation composition multiviscosisty is due to solidification.The multiviscosisty molten steel flowed out flow towards the solidification end point in final solidification portion, directly solidifies and forms the multiviscosisty band of segregation composition.The multiviscosisty band of the segregation composition being consequently formed is exactly segregation.
Summary of the invention
Namely the present invention is made in view of the above problems, it is provided that a kind of make it vibrate by hitting strand appropriate when, it is possible to efficiently obtain segregation-free, the continuous casing of the steel of strand that inside quality that non-stop layer is loose is good.
A kind of continuous casing of steel, this manufacture method is when casting the strand that cross section is rectangle, in the both sides in the minor face face of the strand comprising the portion of solidification, at least one pair of hammering vibrator is set, by hitting the minor face face of above-mentioned strand continuously, while above-mentioned strand is applied vibration while casting, by hitting above-mentioned minor face face, the intersection point of straight line when producing the curve of displacement δ (x) and displacement δ (the x)=0.10mm in the slab thickness direction in the face, long limit of the two above-mentioned strands sentencing following (1) formula and the definition of (2) formula, adjust vibrational energy, the axle base of deflector roll and non-concreting thickness ground hit minor face face, make in above-mentioned intersection point, it is more than 200mm from initial point intersection point farther out distance of the hit position in minor face face from above-mentioned strand on strand width.
δ (x)=exp [-1.5 × { ln (x/ (200 × (Δ R/ Δ R0))) }] × δ max ... (1)
δ max=L0 × (E/E0) × (Δ R/ Δ R0) × (t/t0) ... (2)
X: the hit position in strand minor face face is the distance (mm) of strand width when 0,
δ (x): the displacement (mm) in the slab thickness direction at x place, position,
δ max: the maximum displacement (mm) in slab thickness direction,
Δ R: hit the axle base (mm) of the deflector roll of the position in minor face face,
E: the blow energy (J) that every 1 section is unilateral relative to strand,
T: the non-concreting thickness (mm) at the hit position place in strand minor face face of strand,
Wherein, E0=39 (J), Δ R0=245 (mm), t0=26 (mm), L0=0.114 (mm).
(2) continuous casing according to the steel of above-mentioned (1), it is characterized in that, identical by making periodically to hit the phase place of the time in the relative minor face face, left and right of above-mentioned strand, and make above-mentioned displacement δ (x) that the minor face face of above-mentioned left and right produces respectively through strike be overlapped mutually, make this displacement δ (x) stacked up for more than 0.10mm on the whole width of hit position.
The method adopting the present invention, it is the such vibration of more than 0.10mm owing to the displacement in the face, strand long limit hitting strand minor face face and produce can be applied through in the wider scope of strand, it is possible to reduce segregation and center porosity, obtain the strand that inside quality is excellent.
Detailed description of the invention
A kind of continuous casing of steel, this manufacture method is when casting the strand that cross section is rectangle, in the both sides in the minor face face of the strand comprising the portion of solidification, at least one pair of hammering vibrator is set, by hitting the minor face face of above-mentioned strand continuously, while above-mentioned strand is applied vibration while casting, by hitting above-mentioned minor face face, the intersection point of straight line when producing the curve of displacement δ (x) and displacement δ (the x)=0.10mm in the slab thickness direction in the face, long limit of the two above-mentioned strands sentencing following (1) formula and the definition of (2) formula, adjust vibrational energy, the axle base of deflector roll and non-concreting thickness ground hit minor face face, make in above-mentioned intersection point, it is more than 200mm from initial point intersection point farther out distance of the hit position in minor face face from above-mentioned strand on strand width.
δ (x)=exp [-1.5 × { ln (x/ (200 × (Δ R/ Δ R0))) }] × δ max ... (1)
δ max=L0 × (E/E0) × (Δ R/ Δ R0) × (t/t0) ... (2)
X: the hit position in strand minor face face is the distance (mm) of strand width when 0,
δ (x): the displacement (mm) in the slab thickness direction at x place, position,
δ max: the maximum displacement (mm) in slab thickness direction,
Δ R: hit the axle base (mm) of the deflector roll of the position in minor face face,
E: the blow energy (J) that every 1 section is unilateral relative to strand,
T: the non-concreting thickness (mm) at the hit position place in strand minor face face of strand,
Wherein, E0=39 (J), Δ R0=245 (mm), t0=26 (mm), L0=0.114 (mm).
The continuous casing of the steel according to above-mentioned (1), it is characterized in that, identical by making periodically to hit the phase place of the time in the relative minor face face, left and right of above-mentioned strand, and make above-mentioned displacement δ (x) that the minor face face of above-mentioned left and right produces respectively through strike be overlapped mutually, make this displacement δ (x) stacked up for more than 0.10mm on the whole width of hit position.
Claims (2)
1. the continuous casing of a steel, this casting method is when casting the strand that cross section is rectangle, in the both sides in the minor face face of the strand comprising the portion of solidification, at least one pair of hammering vibrator is set, by hitting the minor face face of above-mentioned strand continuously, while above-mentioned strand is applied vibration while casting, it is characterized in that, by hitting above-mentioned minor face face, the intersection point of straight line when producing the curve of displacement δ (x) and displacement δ (the x)=0.10mm in the slab thickness direction in the face, long limit of the two above-mentioned strands sentencing following (1) formula and the definition of (2) formula, adjust vibrational energy, the axle base of deflector roll and non-concreting thickness ground hit minor face face, make from above-mentioned intersection point, it is more than 200mm from initial point intersection point farther out distance of hit position from above-mentioned strand minor face face on strand width,
δ (x)=exp [-1.5 × { ln (x/ (200 × (Δ R/ Δ R0))) }] × δ max ... (1)
δ max=L0 × (E/E0) × (Δ R/ Δ R0) × (t/t0) ... (2)
X: the hit position in strand minor face face is the distance (mm) of strand width when 0,
δ (x): the displacement (mm) in the slab thickness direction at x place, position,
δ max: the maximum displacement (mm) in slab thickness direction,
Δ R: hit the axle base (mm) of the deflector roll of the position in minor face face,
E: the blow energy (J) that every 1 section is unilateral relative to strand,
T: the non-concreting thickness (mm) at the hit position place in strand minor face face of strand,
Wherein, E0=39 (J), Δ R0=245 (mm), t0=26 (mm), L0=0.114 (mm).
2. the continuous casing of steel according to claim 1, it is characterized in that, identical by making periodically to hit the phase place of the time in the minor face face of the relative left and right of above-mentioned strand, and making above-mentioned displacement δ (x) that the minor face face of above-mentioned left and right produces respectively through strike be overlapped mutually, displacement δ (x) making this superposition is more than 0.10mm on the whole width of hit position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410737331.3A CN105710326A (en) | 2014-12-05 | 2014-12-05 | Steel continuous casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410737331.3A CN105710326A (en) | 2014-12-05 | 2014-12-05 | Steel continuous casting method |
Publications (1)
| Publication Number | Publication Date |
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| CN105710326A true CN105710326A (en) | 2016-06-29 |
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| CN201410737331.3A Pending CN105710326A (en) | 2014-12-05 | 2014-12-05 | Steel continuous casting method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019184729A1 (en) * | 2018-03-29 | 2019-10-03 | 马鞍山钢铁股份有限公司 | Method for improving fluidity of solid-liquid two-phase region in middle and late solidification stages of continuous casting process, and method and device for controlling quality of cast ingot |
| WO2019184730A1 (en) * | 2018-03-29 | 2019-10-03 | 马鞍山钢铁股份有限公司 | Continuous casting solidification process control method for inhibiting growth of columnar crystals |
-
2014
- 2014-12-05 CN CN201410737331.3A patent/CN105710326A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019184729A1 (en) * | 2018-03-29 | 2019-10-03 | 马鞍山钢铁股份有限公司 | Method for improving fluidity of solid-liquid two-phase region in middle and late solidification stages of continuous casting process, and method and device for controlling quality of cast ingot |
| WO2019184730A1 (en) * | 2018-03-29 | 2019-10-03 | 马鞍山钢铁股份有限公司 | Continuous casting solidification process control method for inhibiting growth of columnar crystals |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160629 |
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| WD01 | Invention patent application deemed withdrawn after publication |