CN1380153A - Electromagnetic continuous casting method of hollow metal tube blank - Google Patents
Electromagnetic continuous casting method of hollow metal tube blank Download PDFInfo
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- CN1380153A CN1380153A CN 02109370 CN02109370A CN1380153A CN 1380153 A CN1380153 A CN 1380153A CN 02109370 CN02109370 CN 02109370 CN 02109370 A CN02109370 A CN 02109370A CN 1380153 A CN1380153 A CN 1380153A
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- 239000002184 metal Substances 0.000 title claims abstract description 36
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000009749 continuous casting Methods 0.000 title claims abstract description 16
- 230000005672 electromagnetic field Effects 0.000 claims abstract description 42
- 238000003756 stirring Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 239000011819 refractory material Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- 238000005266 casting Methods 0.000 abstract description 16
- 239000002131 composite material Substances 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 13
- 238000002360 preparation method Methods 0.000 description 9
- 229910000851 Alloy steel Inorganic materials 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 239000013078 crystal Substances 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000009750 centrifugal casting Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 210000005239 tubule Anatomy 0.000 description 1
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Abstract
The present invention relates to an electromagnetic continuous casting method of hollow metal pipe blank, in particular it relates to a technological process for applying electromagnetic field in the course of continuously casting hollow metal pipe blank. Said invented technique is characterized by that it utilizes the structure design of internal and external crystallizes of hollow pipe blank and technical scheme of applying low-frequency, industrial frequency, meidum-frequency and high-frequency electromagnetic fields or applying low and industrial frequency and medium-high frequency composite electromagnetic field to outer side of external crystallizer to implement said invented continuous casting process. The wall thickness of hollow pipe blank prepared by said method is uniform, error can be controlled at 1%, roughness can be controlled in 0.2 mm.
Description
Technical field
The invention belongs to the metal material preparation field, specially refer to the preparation of hollow metal tube blank.
Background technology
The output of seamless metal tubing and quality depend primarily on the production of hollow bloom.The method of producing at present hollow metal tube blank mainly contains two kinds: a kind of is perforation method, and main technique is that molten steel obtains strand, strand cooling, processing through continuous casting, and then bores a hole through heating after and obtain hollow metal tube blank.Hollow bloom obtains seamless metal pipe after rolling or cold-drawn.Though perforation method technology comparative maturity also is widely used in the preparation of hollow metal tube blank, but the shortcoming that its efficient is low, energy consumption is big also is apparent, particularly the preparation for some high alloy and special-shaped hollow metal tube blank is comparatively difficult, easily produce invagination, crackle in the perforation procedure, defectives such as layering, and the boring of having to sometimes.Another kind is horizontal centre spinning, and this technology is that molten metal is directly poured into centrifugal casting mould, solidifies in the casting mold of rotation, can directly obtain hollow metal tube blank.But this method can only production open circles pipe, can not produce special-shaped hollow metal tube blank, and the pipe internal soundness that adopts traditional centre spinning to produce is poor, crystal grain is thick, cause that pipe intensity is low, plasticity is poor, rolling difficulty is difficult to realize for producing tubule footpath hollow bloom especially.
Disclosed JP01249242 patent in 1989 proposes to apply the method that stirs electromagnetic field at solidification end.This method adopts the centreless method to produce hollow bloom, applies at the end that solidifies and stirs the thrust that electromagnetic field elimination inner surface dendritic growth causes, obtains the comparatively smooth hollow metal tube blank of inner surface.But this method is produced hollow bloom and is had two aspect defectives, the one, and the molten metal of solidification end can't obtain upgrading; The 2nd, the pipe wall thickness is by the decision of solidified shell self-sow, and lack of homogeneity circumferentially reaches axial wall thickness control and is difficult to realize.Therefore, present high-quality hollow metal tube blank preparation remains the key point of the nearly end form technology that realizes tubing.
Summary of the invention
The electromagnetic continuous casting method that the purpose of this invention is to provide a kind of hollow metal tube blank.This technology is by being cast in metal liquid by in an outer crystallizer and the die cavity that interior crystallizer constituted, and the crystallizer outside applies low frequency, power frequency, intermediate frequency or electromagnetic field of high frequency outside, the initial stage process of setting of control pipe, it is even that thereby the hollow bloom of preparation has wall thickness, inside and outside apparent mass is good, need not reprocessing, solidified inside organizes crystal grain tiny, circumferential solidified structure uniformity height, and its performance can guarantee direct rolling hollow metal tube blank under as cast condition, can realize the nearly end form technology that seamless metal pipe is produced.
Realize that technical scheme of the present invention is:
(1) design hollow bloom crystallizer.Outer crystallizer is made up of two parts, top is refractory material matter heat top, the bottom is the copper crystallizer of water-cooled split, its week is upwards evenly offered the wide slit that is parallel to each other with axis, can strengthen the magnetic induction intensity in the die cavity, stitches wide 0.4-1.0mm, filling refractory material in the slit, with water-cooled split crystallizer connecting portion connecting ring is set on the heat top, material is BN, i.e. boron nitride; Combined type water-cooled interior crystallizer is made up of two parts, top is refractory material matter heat top, the bottom is the copper crystallizer of water-cooled, the two connecting portion is provided with connecting ring, and material is BN, and the interior crystallizer bottom links to each other with two cold water injectors, cooling water in the interior crystallizer directly enters two device for cooling, hollow metal tube blank is carried out the secondary cooling, and inside and outside crystallizer connects by fixed mount, and material is 0Cr18Ni9Ti.
(2) the design electromagnetic field applies pattern.In the hollow metal tube blank continuous casting process, the crystallizer outside applies the stirring electromagnetic field of 5-60Hz, the middle frequency electromagnetic field of 1000-9000Hz and electromagnetic field of high frequency or stirring electromagnetic field and the compound electromagnetic field of middle and high frequency electromagnetic field of 10000-100000Hz separately outside.
Effect of the present invention and benefit are to have realized the electromagnetic continuous-casting technical process of hollow metal tube blank, directly obtain the metal strand of hollow without perforation, thereby reduce the production process of seamless metal pipe, cut down the consumption of energy, and raise the efficiency, and have significantly reduced production cost.This technology can prepare special-shaped hollow blooms such as alloy pipe stock such as high-alloy steel pipe, copper pipe base and circle, triangle, rectangle, polygon.In military project, nuclear industry, high temperature is anti-corrosion and field of petrochemical industry has broad application prospects.
Description of drawings
Accompanying drawing 1 is a hollow metal tube blank electromagnetic continuous-casting theory structure schematic diagram.
Among the figure: (1) fixed mount, (2) heat top, (3) cooling water, (4) metal bath, (5) connecting ring, (6) stir electromagnetic field generator, (7) combined type water-cooled interior crystallizer, (8) two cold water injectors, (9) solidified shell, the outer crystallizer of (10) water-cooled split, (11) bed die.
Fig. 2 is the outer crystallizer cutaway view (A-A analyses and observe) of water-cooled split.
(12) wide slit among the figure.
Fig. 3 is the hollow bloom continuous casting schematic diagram that applies the combined electromagnetic field.
(13) intermediate frequency or high-frequency electromagnetic field generator among the figure.
The specific embodiment
Below in conjunction with accompanying drawing, be described in detail specific embodiments of the present invention.
Embodiment one
Stir electromagnetic field generator (6) to use, the hollow high-alloy steel pipe of preparation Φ 100 * 20mm is an example, and concrete steps are as follows:
Step 1: device is prepared
Stir electromagnetic field generator (6) and adopt two pairs of polar curve circles, frequency is 50Hz, and the phase angle is 90 °, and power is 1-6kW, and the inboard spacing with the outer crystallizer (10) of water-cooled split of each coil is 5-10mm.Heat top (2) material is a high alumina graphite matter, is of a size of Φ 140 * 20mm, highly is 120mm.Connecting heat top (2) and the outer crystallizer (10) of water-cooled split with connecting ring (5), be of a size of Φ 110 * 5mm, highly is 30mm, and connecting ring (5) upper surface is positioned at 15mm on the Re Ding lower surface.Outer crystallizer (10) external diameter of water-cooled split is Φ 140mm, and internal diameter is Φ 100mm, highly is 80mm, and material is a red copper; The 5mm place is the wide slit (12) of 60mm along circumferentially evenly offering 8 its width downwards for 0.4mm length under crystallizer outside the water-cooled split (10) upper surface, filling refractory material in wide slit (12); Combined type water-cooled interior crystallizer (7) top soaking zone refractory material is a high alumina graphite matter, and its external diameter is Φ 70mm, highly is 130mm, and bottom cooling section material is a red copper, and external diameter is Φ 60mm, highly is 50mm.The coil axis plane is concordant with Re Ding (2) lower surface.Fixedly combined type water-cooled interior crystallizer (7) is adjusted fixed mount (1) position, with combined type water-cooled interior crystallizer (7) centering.
Step 2: high-alloy steel blank fusing
Adopt vacuum induction furnace that the high-alloy steel blank is melted to 1600-1620 ℃, refining, degasification, slagging-off back heat preservation for standby use.
Step 3: hollow bloom electromagnetic continuous-casting
Bed die (11) is inserted cavity in the casting mold, after checking cooling system and guaranteeing that it is in normal operating conditions, 1570-1590 ℃ molten steel is poured in the casting mold, level control is apart from heat top (2) top 40mm, and allowable error is ± 10%.Start and stir electromagnetic field generator power supply (6), with the speed pulling bed die (11) of 0.8m/min.Along with constantly pouring into of molten steel and moving down of bed die (11), all the time with level control in the scope that requires to allow; When the casting pipe reaches requirement length, stop casting of molten metal, cut off the electricity supply, close cooling system, shut down.
Step 4: quality examination
Pipe is pressed that 1.5m length is cut off, after the cooling, detected the wall thickness uniformity, and error is in 1%; Metallographic structure is observed in section polishing, corrosion back, compare with not applying the pipe that stirs electromagnetic field, not only the circumferential uniformity of solidified structure significantly improves, and the obvious refinement of the crystal grain of solidified structure.
Embodiment two
To use middle frequency electromagnetic field generator (13), the hollow high-alloy steel pipe of preparation Φ 100 * 20mm is an example, and concrete steps are as follows:
Step 1: device is prepared
The loop coil that middle frequency electromagnetic field generator (13) is made for circle, square copper pipe, coil inner cavity size Φ 150mm highly is 50mm; Power is 20-40kW, and frequency is 2000Hz.The design of hollow bloom crystallizer is with embodiment 1.Middle frequency electromagnetic field generator (13) plane, top is higher than heat top (2) lower surface 15mm.Fixedly combined type water-cooled interior crystallizer is with embodiment 1.
Step 2: high-alloy steel blank fusing
With embodiment 1.
Step 3: hollow bloom electromagnetic continuous-casting
Bed die (11) is inserted cavity in the casting mold, after checking cooling system and guaranteeing that it is in normal operating conditions, 1570-1590 ℃ molten steel is poured in the casting mold, level control is apart from heat top (2) top 40mm, and allowable error is ± 10%.Start middle frequency electromagnetic field generator (13) power supply, with the speed pulling bed die (11) of 0.8m/min.Along with constantly pouring into of molten steel and moving down of bed die (11), all the time with level control in the scope that requires to allow; When the casting pipe reaches requirement length, stop casting of molten metal, cut off the electricity supply, close cooling system, shut down.
Step 4: quality examination
Pipe is pressed that 1.5m length is cut off, after the cooling, detected the wall thickness uniformity, and error is in 1%; Casting billet surface fineness relatively, apply middle frequency electromagnetic field after the surfaces externally and internally quality obviously improve; Metallographic structure is observed in section polishing, corrosion back, compare with not applying the pipe that stirs electromagnetic field, solidified inside is organized the obvious refinement of crystal grain.
Embodiment three
With the combined electromagnetic field that produces with stirring electromagnetic field (6) and middle frequency electromagnetic field (13), the hollow high-alloy steel pipe of preparation Φ 100 * 20mm is an example, and concrete steps are as follows:
Step 1: device is prepared
Stir electromagnetic field generator (6) with embodiment 1, middle frequency electromagnetic field generator (13) is with embodiment 2.The design of hollow bloom crystallizer is with embodiment 1.Stir electromagnetic field generator (6) median plane and be positioned at 30mm under the liquid level, middle frequency electromagnetic field generator (13) plane, top is higher than Re Ding lower surface 15mm.Fixedly combined type water-cooled interior crystallizer is with embodiment 1.
Step 2: high-alloy steel blank fusing
With embodiment 1.
Step 3: hollow bloom electromagnetic continuous-casting
Bed die (11) is inserted cavity in the casting mold, after checking cooling system and guaranteeing that it is in normal operating conditions, 1570-1590 ℃ molten steel is poured in the casting mold, level control is apart from heat top (2) top 40mm, and allowable error is ± 10%.Start middle frequency electromagnetic field generator (13) and stir electromagnetic field generator (6) power supply, with the speed pulling bed die (11) of 0.8m/min.Along with constantly pouring into of molten steel and moving down of bed die (11), all the time with level control in the scope that requires to allow; When the casting pipe reaches requirement length, stop casting of molten metal, cut off the electricity supply, close cooling system, shut down.
Step 4: quality examination
Pipe is pressed that 1.5m length is cut off, after the cooling, detected the wall thickness uniformity, and error is in 1%; Casting billet surface fineness relatively, apply middle frequency electromagnetic field after the surfaces externally and internally quality significantly improve; Metallographic structure is observed in section polishing, corrosion back, compare with not applying the pipe that stirs electromagnetic field, solidified inside is organized the obvious refinement of crystal grain.
Claims (2)
1. the electromagnetic continuous casting method of a hollow metal tube blank, by metal liquid being injected continuously by in outer crystallizer (10) of water-cooled split and the formed cavity of combined type water-cooled interior crystallizer (7), and crystallizer (10) outside applies electromagnetic field outside the water-cooled split, the initial stage of control metal bath solidifies, obtain hollow metal tube blank, it is characterized in that adopting outer crystallizer (10) of heat top (2) water-cooled split and combined type water-cooled interior crystallizer (7), and in the continuous casting process, apply low, power frequency stir electromagnetic field and in, electromagnetic field of high frequency or the electromagnetic field that the two is compound, the frequency range that stirs electromagnetic field is: 5-60Hz, the frequency range in intermediate frequency magnetic field is: 1000-9000Hz, the frequency range of high frequency magnetic field is: 10000-100000Hz.
2. the electromagnetic continuous casting method of a kind of metal hollow pipe according to claim 1, its feature also is: outer crystallizer (10) the type wall of water-cooled split is circumferentially evenly offered the wide slit (12) that parallels with axis, stitch wide 0.4-1.0mm, filling refractory material in the seam; Between the outer crystallizer (10) of heat top (2) and water-cooled split connecting ring (5) is set, the initial solidification position of outer crystallizer (10) side of water-cooled split is in this section, and its material is BN; Combined type water-cooled interior crystallizer (7) is made up of two parts, and top is refractory material matter heat top, and the bottom is the copper crystallizer of water-cooled, and the two connecting portion is provided with connecting ring (5), and material is BN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021093709A CN1169640C (en) | 2002-03-27 | 2002-03-27 | Electromagnetic continuous casting method of hollow metal tube blank |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB021093709A CN1169640C (en) | 2002-03-27 | 2002-03-27 | Electromagnetic continuous casting method of hollow metal tube blank |
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| CN1380153A true CN1380153A (en) | 2002-11-20 |
| CN1169640C CN1169640C (en) | 2004-10-06 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102179487A (en) * | 2010-10-13 | 2011-09-14 | 中国科学院金属研究所 | Short-flow preparation process for thick-wall ring piece and thick-wall tube piece |
| CN101664801B (en) * | 2009-10-19 | 2011-10-05 | 东北大学 | Method and device for low overheat composite casting aluminum alloy under action of steady magnetic field |
| CN102211161A (en) * | 2011-05-27 | 2011-10-12 | 青岛理工大学 | Method and device for improving quality of continuous casting large-diameter hollow metal pipe blank |
| WO2012040942A1 (en) * | 2010-09-27 | 2012-04-05 | Zhou Jiule | Device for continuously casting steel tubes |
| CN102773430A (en) * | 2012-06-12 | 2012-11-14 | 中冶京诚工程技术有限公司 | Continuous casting device and method for large-section hollow pipe blank |
| CN102794416A (en) * | 2012-07-19 | 2012-11-28 | 苏州有色金属研究院有限公司 | Aluminum alloy hollow ingot semi-continuous casting crystallizer and application thereof |
| CN103447490A (en) * | 2013-09-04 | 2013-12-18 | 青岛理工大学 | Method and device for removing non-metallic inclusions in continuous casting process of hollow pipe blank |
| CN107008873A (en) * | 2017-04-11 | 2017-08-04 | 上海大学 | Multi-mode electrically magnetic field homogenizes the preparation method and its device of metal strand |
| CN112845654A (en) * | 2019-11-12 | 2021-05-28 | 新疆大学 | Preparation method of large-size titanium and titanium alloy seamless pipe |
-
2002
- 2002-03-27 CN CNB021093709A patent/CN1169640C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101664801B (en) * | 2009-10-19 | 2011-10-05 | 东北大学 | Method and device for low overheat composite casting aluminum alloy under action of steady magnetic field |
| WO2012040942A1 (en) * | 2010-09-27 | 2012-04-05 | Zhou Jiule | Device for continuously casting steel tubes |
| CN102179487A (en) * | 2010-10-13 | 2011-09-14 | 中国科学院金属研究所 | Short-flow preparation process for thick-wall ring piece and thick-wall tube piece |
| CN102179487B (en) * | 2010-10-13 | 2013-04-17 | 中国科学院金属研究所 | Short-flow preparation process for thick-wall ring piece and thick-wall tube piece |
| CN102211161A (en) * | 2011-05-27 | 2011-10-12 | 青岛理工大学 | Method and device for improving quality of continuous casting large-diameter hollow metal pipe blank |
| CN102211161B (en) * | 2011-05-27 | 2012-10-03 | 青岛理工大学 | Method and device for improving quality of continuous casting large-diameter hollow metal pipe blank |
| CN102773430A (en) * | 2012-06-12 | 2012-11-14 | 中冶京诚工程技术有限公司 | Continuous casting device and method for large-section hollow pipe blank |
| CN102794416A (en) * | 2012-07-19 | 2012-11-28 | 苏州有色金属研究院有限公司 | Aluminum alloy hollow ingot semi-continuous casting crystallizer and application thereof |
| CN103447490A (en) * | 2013-09-04 | 2013-12-18 | 青岛理工大学 | Method and device for removing non-metallic inclusions in continuous casting process of hollow pipe blank |
| CN107008873A (en) * | 2017-04-11 | 2017-08-04 | 上海大学 | Multi-mode electrically magnetic field homogenizes the preparation method and its device of metal strand |
| CN107008873B (en) * | 2017-04-11 | 2020-01-17 | 上海大学 | Method and device for preparing multi-mode electromagnetic field homogenized metal continuous casting billet |
| CN112845654A (en) * | 2019-11-12 | 2021-05-28 | 新疆大学 | Preparation method of large-size titanium and titanium alloy seamless pipe |
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| CN1169640C (en) | 2004-10-06 |
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