CN100593451C - Method for producing two-stage type non-joint-cutting crystallizer sheathed tube for soft-contact electromagnetic continuous casting - Google Patents
Method for producing two-stage type non-joint-cutting crystallizer sheathed tube for soft-contact electromagnetic continuous casting Download PDFInfo
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- CN100593451C CN100593451C CN200810012349A CN200810012349A CN100593451C CN 100593451 C CN100593451 C CN 100593451C CN 200810012349 A CN200810012349 A CN 200810012349A CN 200810012349 A CN200810012349 A CN 200810012349A CN 100593451 C CN100593451 C CN 100593451C
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Abstract
The present invention relates to a fabrication method of a two-sectioned kerfless crystallizer sleeve used by soft-contact electromagnetic continuous casting. Electrolytic copper, Cu-50Mn alloy, silicon particles, metallic aluminium, Ti-50Si alloy and Cu-14P are adopted as materials to prepare a copper-based alloy tube with high magnetic permeability by a vacuum induction heat-melting casting method, and then a copper tube material which is commonly used in the traditional continuous casting crystallizer is welded with the copper-based alloy tube to form the two-sectioned kerfless crystallizersleeve; or electrolytic copper, Mn powder, silicon powder, aluminum powder, Ti powder and Cu-14P alloy are adopted as materials to prepare the two-sectioned kerfless crystallizer sleeve respectivelyby a welding method or a gradient connection method. Compared with the traditional pure copper crystallizer used by continuous casting, the magnetic permeability of the two-sectioned kerfless crystallizer sleeve prepared by the method of the present invention is increased by 71.3 percent, thus perfectly satisfying the requirement on the magnetic permeability of the soft-contact crystallizer.
Description
Technical field
The invention belongs to metallurgical equipment manufacturing technology field, particularly the soft-contact electromagnetic continuous casting manufacture method of two-part seemless crystallizer sleeve pipe.
Background technology
The soft-contact electromagnetic continuous casting technology is to utilize alternating magnetic field to see through the crystallizer sleeve pipe to affact on the molten steel in the crystallizer sleeve pipe, what produce in molten steel that electromagnetic pressure reduces strand and crystallizer casing wall contacts pressure and vibration pressure, contact angle is increased, the slag road broadens, and the inflow of slag liquid is more unobstructed, helps improving the initial solidification process of continuous casting, alleviate the surperficial oscillation mark of strand, reduce the ratio that face crack takes place, improve pulling rate simultaneously, improve output.Yet can the soft-contact electromagnetic continuous casting technology of steel be able to successful Application in industrial production, and key depends on whether the crystallizer sleeve pipe can satisfy magnetic susceptibility height, requirement that cooling effect is good simultaneously, and this also is the bottleneck place that this technology realizes actual industrial production.
At present, the soft-contact electromagnetic continuous casting crystallizer sleeve pipe of steel can be divided into two kinds of cutting seam type soft-contact mould sleeve pipe and gapless soft-contact mould sleeve pipes by the difference of its material and structure.Cutting seam type soft-contact mould sleeve pipe has significantly improved magnetic permeability, but brings crystallizer sleeve pipe internal magnetic field skewness simultaneously, and the crystallizer casing strength descends, and a difficult problem such as chilled(cooling) water return (CWR) design complexity, fails to be applied to actual industrial production always.Seamless soft-contact mould sleeve pipe is a kind of new structure that proposes in recent years, and wherein, two-part is seamless, and soft-contact electromagnetic continuous casting crystallizer sleeve pipe epimere adopts the respond well material of magnetic, and hypomere adopts the good material of cooling effect.This crystallizer sleeve pipe both can guarantee to have evenly in magnetic field near the metal meniscus, and good magnetic permeability reaches " soft contact " effect, simultaneously guarantee to have favorable cooling effect again at the following liquid metal of meniscus, solve present soft-contact electromagnetic continuous casting and cool off and the problem that the magnetic effect can not be satisfactory to both parties thoroughly, and this crystallizer sleeve pipe has enough intensity and heat-resistant deforming performance with cutting seam type crystallizer sleeve pipe.The soft-contact mould sleeve pipe has the bulk strength that improves crystallizer though two-part is seamless, guarantee the penetrability in magnetic field to a certain extent, crystallizer sleeve pipe internal magnetic field is evenly distributed, and simplify the advantage of cooling water circuit system, but on Material Selection, preparation technology, have bigger difficulty.Therefore, actual in conjunction with producing, finding the manufacture method of the two-part crystallizer sleeve pipe that satisfies production requirement is the task of top priority.
Summary of the invention
At existing cutting seam type soft-contact mould internal magnetic field skewness, crystallizer intensity descends, the chilled(cooling) water return (CWR) design is complicated, gapless soft-contact mould material is selected, the problem of preparation technology's difficulty the invention provides the manufacture method of following soft-contact electromagnetic continuous casting with two-part seemless crystallizer sleeve pipe.
Cathode copper and other alloys made have certain mechanical strength, high temperature abrasion resistance is good, and the acid bronze alloy pipe with high saturating magnetic effect, its material are by weight percentage for containing the copper-based alloy material of Mn 2～10%, Si 3～8%, Al 1～3%, Ti 1～4%, P 0～2.1%; The method that adopts tungsten argon arc welding, vacuum electron beam welding, vacuum brazing method, explosive welding (EW) connection or gradient to connect, the copper tube materials such as phosphorized copper, chromium-copper or chromium zirconium copper that generally use in copper alloy and the traditional continuous cast mold are prepared into length at 700～1500mm, external diameter is 50～200mm, and thickness is the two-part seemless crystallizer sleeve pipe of 5～25mm.
Of the present inventionly mainly may further comprise the steps:
1, welding prepares the method for two-part seemless crystallizer sleeve pipe:
1.1, the vacuum induction heating melting and casting method of the acid bronze alloy pipe of high saturating magnetic effect:
The electrolysis copper billet is put into the black-fead crucible of vacuum induction melting furnace, Cu-50Mn alloy, metallic aluminium, Ti-50Si alloy, silicon grain and Cu-14P alloy are placed in the material alloying device on bell top, each raw material usage ratio is cathode copper by weight percentage: Cu-50Mn alloy: Ti-50Si alloy: silicon grain: metallic aluminium: Cu-14P alloy=50～91: 4～20: 2～8: 2～4: 1～3: 0～15; In vacuum induction melting furnace, vacuumize, when reaching 0.133Pa, vacuum begins to heat up, be heated to more than 1300 ℃, after the electrolysis copper billet is all melted, add Cu-50Mn alloy, metallic aluminium, Ti-50Si alloy, Si grain and Cu-14P alloy successively, keeping the vacuum in the stove is 0.133Pa, material is all melted insulation 20～30min; Stir then and come out of the stove, be poured in the metal pattern, be prepared into the acid bronze alloy base, be processed into pipe then, its material is by weight percentage for containing the copper-based alloy material of Mn 2～10%, Si 3～8%, Al1～3%, Ti 1～4%, P 0～2.1%.
1.2, the powder metallurgic method of the acid bronze alloy pipe of high saturating magnetic effect:
Mn powder, aluminium powder, Si powder, Ti powder, Cu-14P alloy powder and cathode copper powder are placed in the ball mill, speed with 120r/min is mixed powder 4～12h, and each raw material usage ratio is the cathode copper powder by weight percentage: Mn powder: Si powder: Ti powder: aluminium powder: Cu-14P alloy powder=61～93: 2～10: 3～8: 1～4: 1～3: 0～15; Along laterally carrying out unidirectional compacting, pressure 400～900MPa is prepared into the acid bronze alloy base on the omnipotent oil pressure experimental machine at 60 tons under the room temperature; In push-down hydrogen shield stove, carry out sintering then; sintering temperature remains on 850～950 ℃; temperature retention time is 1～5h; cool off with stove; make the acid bronze alloy base; be processed into pipe then, its material is by weight percentage for containing the copper-based alloy material of Mn 2～10%, Si 3～8%, Al 1～3%, Ti 1～4%, P 0～2.1%.
1.3, with in acid bronze alloy pipe and the traditional continuous cast mold of preparation generally the copper tube material of use connect into two-part seemless crystallizer sleeve pipe with tungsten argon arc welding, vacuum electron beam welding, vacuum brazing method or explosive welding (EW) connection.
The tungsten argon arc welding: with acid bronze alloy pipe and to be welded root face of copper tube material is 0.5mm; Remove in the groove and oil, rust and other dirt of pipe bevel end outer surface 20mm scope,, clean this place with acetone again to exposing metallic luster; Carry out backing welding and cosmetic welding respectively, welding parameter is: electric current 90-100A, voltage 10-12V, argon flow amount 6-8L/min, tungsten electrode diameter 2.5mm.
The vacuum electron beam welding: cleaning weld surface, accurately the contact-making surface of worked copper base alloy pipe and copper tube material makes gaping of joints be not more than 0.25mm; Be evacuated to below the 0.133Pa; The preheating weldment; Electron beam welding, welding parameter is: electron beam operating distance 13mm, electronic beam current 43mA, accelerating potential 170kV, speed of welding 90cm/min welds dark 4mm.
Vacuum brazing method: the surface of cleaning acid bronze alloy pipe to be welded and copper tube material; Adopt cutting slot that copper pipe is fixed; Place solder, be coated with stop-off gent; Be evacuated to below the 0.133Pa; Clean surface after the soldering.
The explosive welding (EW) connection: be ready to the acid bronze alloy pipe of epimere of crystallizer sleeve pipe and the copper tube material of hypomere, by hand or mechanical means the faying face for the treatment of of metal material is carried out Cress, make surface roughness≤12.5 μ m; The powder type explosive stacking and load is convenient in selection, carries out explosive welding.
2, the gradient connection method prepares the method for two-part seemless crystallizer sleeve pipe:
Mn powder, aluminium powder, Ti powder, Si powder, Cu-14P alloy powder and cathode copper powder are placed in the ball mill, speed with 120r/min is mixed powder 4～12h, and each raw material usage ratio is the cathode copper powder by weight percentage: Mn powder: Si powder: Ti powder: aluminium powder: Cu-14P alloy powder=60～93: 2～10: 3～8: 1～4: 1～3: 0～15; Material behind the mixed powder is placed the HIP sintering stove, the powder material of an end is wherein told 0～5 section, length overall is 0～10mm, each section adds the cathode copper powder and carries out physical mixed, each section cathode copper composition is increased gradually to the top, top reaches 75～95%, and arranges with gradient distribution mode lamination; The copper tube material that generally uses in traditional continuous cast mold is put into the HIP sintering stove, copper tube material is connected with the maximum end of the copper component of mixed-powder, sintering under pressure 900～1500 atmospheric pressure, temperature remains on 800～1300 ℃, be incubated 0.5～10 hour, cool off with stove, be processed into length then at 700～1500mm, external diameter is 50～200mm, thickness is the two-part seemless crystallizer sleeve pipe of 5～25mm, and the material of its epimere is by weight percentage for containing Mn 2～10%, Si 3～8%, Al 1～3%, Ti 1～4%, the copper-based alloy material of P 0～2.1%.
Crystallizer sleeve pipe of the present invention adopts the two-part structure, form by the copper tube material of bottom and the copper alloy tube on top respectively, the copper tube material of bottom adopts the copper materials such as phosphorized copper, chromium-copper or chromium zirconium copper that generally use in traditional continuous cast mold, and chromium plating is carried out on the copper surface or nickel-clad iron is handled; The copper alloy tube on top requires to have certain mechanical strength, and high temperature abrasion resistance is good, and has higher saturating magnetic effect.
Two-part seemless crystallizer sleeve pipe of the present invention is in the soft-contact electromagnetic continuous casting application process, can make by continuous casting of metals liquid meniscus bottom above last hypomere intersection, guarantee that magnetic field has even and good magnetic permeability near the metal liquid meniscus, has favorable cooling effect at the following liquid towards metal of meniscus, than of the saturating magnetic effect increase 71.3% of traditional continuous casting with fine copper crystallizer sleeve pipe, can satisfy the saturating magnetic effect of requirement of soft-contact mould preferably, solving present copper cutting seam type crystallizer sleeve pipe cooling and saturating magnetic effect can not two drawback of standing.And the crystallizer sleeve pipe that produces has enough intensity and higher heat-resistant deforming performance.The crystallizer sleeve pipe that this method is made can be realized the soft-contact electromagnetic continuous casting of round base, square billet and the slab of refractory metals such as steel, effectively improve the metal slab surface quality, improve its ratio of performance to price, especially the continuous casting electromagnetic production technology of slab, the present invention compares with traditional crystallizer sleeve pipe has remarkable advantages, has a extensive future.
Description of drawings
Fig. 1 is the application schematic diagram of two-part seemless crystallizer sleeve pipe of the present invention, 1, the epimere of two-part seemless crystallizer sleeve pipe, 2, the hypomere of two-part seemless crystallizer sleeve pipe, 3, two-part seemless crystallizer sleeve pipe junction, 4, induction coil, 5, motlten metal, 6, meniscus, 7, solid-liquid two-phase region, 8, solidified shell.
Fig. 2 is the test curve figure of the center magnetic induction intensity of two-part seemless crystallizer sleeve pipe and traditional crystallizer sleeve pipe, curve a is the test result of two-part seemless crystallizer sleeve pipe, curve b is the test result of traditional crystallizer sleeve pipe, 1, the epimere of two-part seemless crystallizer sleeve pipe, 2, the hypomere of two-part seemless crystallizer sleeve pipe, 3, two-part seemless crystallizer sleeve pipe junction, 4, induction coil.
The specific embodiment
Cathode copper, metallic aluminium and silicon grain purity that the invention process adopts are greater than 99%, and Cu-50Mn alloy, Ti-50Si alloy and Cu-14P alloy purity are greater than 97%.
Cathode copper powder, aluminium powder and Si powder purity that the invention process adopts are greater than 99%, and granularity is less than 200 orders.
Mn powder, Ti powder and Cu-14P alloy powder purity that the invention process adopts are greater than 97%, and granularity is less than 200 orders.
The vacuum induction melting furnace that the invention process adopts is a ZG-0.01 type vacuum induction melting furnace.
The electrolysis copper billet is put into the black-fead crucible of vacuum induction melting furnace, Cu-50Mn alloy, metallic aluminium, Ti-50Si alloy, Si grain and Cu-14P alloy are placed in the material alloying device on bell top, each raw material usage ratio is cathode copper by weight percentage: Cu-50Mn alloy: Ti-50Si alloy: Si grain: metallic aluminium: Cu-14P alloy=50: 20: 8: 4: 3: 15; Vacuumize, when vacuum reaches 0.133Pa, begin to heat up, be heated to more than 1300 ℃, cathode copper is all melted; Add Cu-50Mn alloy, metallic aluminium, Ti-50Si alloy, Si grain and Cu-14P alloy successively, the vacuum in the stove is remained at below the 0.133Pa; After material all melts, insulation 30min; Come out of the stove after the agitation as appropriate, solution casting is gone in the metal pattern, be prepared into the acid bronze alloy base, be processed into pipe then, its alloying component percentage by weight is for containing Mn10%, and Si 8%, Ti4%, and Al3%, P2.1%, surplus is Cu.
Adopt the tungsten argon arc welding to prepare two-part seemless crystallizer sleeve pipe:
With to be welded root face of phosphorous deoxidize copper tube and acid bronze alloy pipe is 0.5mm; Remove in the groove and oil, rust and other dirt of pipe bevel end outer surface 20mm scope,, clean this place with acetone again to exposing metallic luster; At first carry out backing welding, carry out cosmetic welding again, finish the welding of two-part seemless crystallizer sleeve pipe; Welding parameter is: electric current 90～100A, voltage 10～12V, argon flow amount 6～8L/min, tungsten electrode diameter 2.5mm.
Effect as shown in Figure 1 when using two-part seemless crystallizer sleeve pipe of the present invention and carrying out the soft-contact electromagnetic continuous casting of steel, the crystallizer sleeve pipe is made up of the copper alloy 1 of epimere high resistivity and the copper 2 of hypomere high thermal conductivity, external diameter is 100mm, last segment length is 100mm, hypomere is 800mm, thickness is 10mm, and 3 places weld together at joint face.In the crystallizer outside induction coil 4 is set, the penetration by electromagnetic fields crystallizer wall that induction coil produces affacts on the interior metal liquid 5, and molten metal is received the electromagnetic force of pointing to the fluid column center, has formed meniscus 6.
The magnetic induction intensity test result of two-part seemless crystallizer sleeve pipe of the present invention and traditional continuous cast mold sleeve pipe center as shown in Figure 2, the magnetic induction intensity test result of curve a two-part seemless of the present invention crystallizer sleeve pipe center, the top of two-part seemless crystallizer sleeve pipe is 8.2 * 10 by resistivity
-7The acid bronze alloy of Ω m is formed, and the bottom is 1.67 * 10 by resistivity
-8The copper tube material of Ω m is formed, and supply frequency is 1000Hz, and power is 30kw.Curve b is the magnetic induction intensity test result of traditional continuous cast mold sleeve pipe center, is 1.67 * 10 by resistivity all
-8The copper tube material of Ω m is formed, and all the other conditions are identical with the two-part crystallizer.The magnetic induction intensity test result shows, under the condition of intermediate frequency 1000Hz, the two-part seemless crystallizer sleeve pipe that adopts the inventive method preparation can satisfy the saturating magnetic effect of requirement of soft-contact electromagnetic continuous casting technology than the saturating magnetic effect increase 71.3% of traditional continuous casting with fine copper crystallizer sleeve pipe.
The electrolysis copper billet is put into the black-fead crucible of vacuum induction melting furnace, Cu-50Mn alloy, metallic aluminium, Ti-50Si alloy, Si grain and Cu-14P alloy are placed in the material alloying device on bell top, each raw material usage ratio is cathode copper by weight percentage: Cu-50Mn alloy: Ti-50Si alloy: Si grain: metallic aluminium: Cu-14P alloy=67: 12: 6: 3: 2: 10; Vacuumize, when vacuum reaches 0.133Pa, begin to heat up, be heated to more than 1300 ℃, cathode copper is all melted; Add Cu-50Mn alloy, metallic aluminium, Ti-50Si alloy, Si grain and Cu-14P alloy successively, the vacuum in its stove is remained at below the 0.133Pa; After material all melts, insulation 25min; Come out of the stove after the agitation as appropriate, solution casting is gone in the metal pattern, be prepared into the acid bronze alloy base, be processed into pipe then, its alloying component percentage by weight is for containing Mn6%, and Si 6%, Ti3%, and Al2%, P1.4%, surplus is Cu.
Adopt the vacuum electron beam welding to prepare two-part seemless crystallizer sleeve pipe:
Cleaning weld surface accurately processes chromium-copper pipe and acid bronze alloy tube contacts face, makes gaping of joints be not more than 0.25mm; Be evacuated to below the 0.133Pa; Adopt the electron beam welding connection behind the preheating weldment, finish the welding of two-part seemless crystallizer sleeve pipe; Welding parameter is: electron beam operating distance 13mm, and electronic beam current 43mA, accelerating potential 170kV, speed of welding 90cm/min welds dark 4mm.
The crystallizer casing size of preparation is that external diameter is 150mm, and last segment length is 150mm, and hypomere is 1050mm, and thickness is 15mm.
The electrolysis copper billet is put into the black-fead crucible of vacuum induction melting furnace, Cu-50Mn alloy, metallic aluminium, Ti-50Si alloy and Si grain are placed in the material alloying device on bell top, each raw material usage ratio is cathode copper by weight percentage: Cu-50Mn alloy: Ti-50Si alloy: Si grain: metallic aluminium=91: 4: 2: 2: 1; Vacuumize, when vacuum reaches 0.133Pa, begin to heat up, be heated to more than 1300 ℃, cathode copper is all melted; Add Cu-50Mn alloy, metallic aluminium, Ti-50Si alloy and Si grain successively, the vacuum in its stove is remained at below the 0.133Pa; After material all melts, insulation 20min; Come out of the stove after the agitation as appropriate, solution casting is gone in the metal pattern, be prepared into the acid bronze alloy base, be processed into pipe then, its alloying component percentage by weight is for containing Mn2%, and Si 3%, Ti1%, and Al1%, surplus is Cu.
Adopt the vacuum brazing legal system to be equipped with two-part seemless crystallizer sleeve pipe:
Clean chromium-zirconium-copper tubes to be welded and copper alloy tube the surface; Adopt cutting slot that copper pipe is fixed; Place solder, be coated with stop-off gent; Be evacuated to below the 0.133Pa; Clean surface after the soldering is finished the welding of two-part seemless crystallizer sleeve pipe.
The crystallizer casing size of preparation is that external diameter is 50mm, and last segment length is 100mm, and hypomere is 600mm, and thickness is 5mm.
Mn powder, aluminium powder, Ti powder, Si powder, Cu-14P alloy powder and cathode copper powder are placed in the ball mill, speed with 120r/min is mixed powder 4h, and each raw material usage ratio is the cathode copper powder by weight percentage: Mn powder: Si powder: Ti powder: aluminium powder: Cu-14P alloy powder=60: 10: 8: 4: 3: 15; Along laterally carrying out unidirectional compacting, pressure 400MPa is prepared into the acid bronze alloy base on the omnipotent oil pressure experimental machine at 60 tons under the room temperature; Carry out sintering then in push-down hydrogen shield stove, sintering temperature remains on 850 ℃, and temperature retention time is 1h, cools off with stove; make the acid bronze alloy base, be processed into pipe then, its alloying component percentage by weight is for containing Mn10%, and Si 8%; Ti4%, Al3%, P2.1%, surplus is Cu.
Adopt the explosive welding legal system to be equipped with two-part seemless crystallizer sleeve pipe:
Be ready to the copper alloy tube of crystallizer epimere and the phosphorous deoxidize copper tube of hypomere, by hand or mechanical means the faying face for the treatment of of metal material is carried out Cress, make surface roughness≤12.5 μ m; Carry out the explosion welding then, finish the explosive welding of two-part seemless crystallizer sleeve pipe.
The crystallizer casing size of preparation is that external diameter is 200mm, and last segment length is 200mm, and hypomere is 1300mm, and thickness is 25mm.
Mn powder, aluminium powder, Ti powder, Si powder, Cu-14P alloy powder and cathode copper powder are placed in the ball mill, speed with 120r/min is mixed powder 8h, and each raw material usage ratio is the cathode copper powder by weight percentage: Mn powder: Si powder: Ti powder: aluminium powder: Cu-14P alloy powder=73: 8: 5: 2: 2: 10; Along laterally carrying out unidirectional compacting, pressure 600MPa is prepared into the acid bronze alloy base on the omnipotent oil pressure experimental machine at 60 tons under the room temperature; Carry out sintering then in push-down hydrogen shield stove, sintering temperature remains on 900 ℃, and temperature retention time is 3h, cools off with stove; make the acid bronze alloy base, be processed into pipe then, its alloying component percentage by weight is for containing Mn8%, and Si 5%; Ti2%, Al2%, P1.4%, surplus is Cu.
Adopt the tungsten argon arc welding to prepare two-part seemless crystallizer sleeve pipe:
With to be welded root face of chromium-copper pipe and acid bronze alloy pipe is 0.5mm; Remove in the groove and oil, rust and other dirt of pipe bevel end outer surface 20mm scope,, clean this place with acetone again to exposing metallic luster; At first carry out backing welding, carry out cosmetic welding again, finish the welding of two-part seemless crystallizer sleeve pipe; Welding parameter is: electric current 90～100A, voltage 10～12V, argon flow amount 6～8L/min, tungsten electrode diameter 2.5mm.
The crystallizer casing size of preparation is that external diameter is 100mm, and last segment length is 100mm, and hypomere is 800mm, and thickness is 10mm.
Mn powder, aluminium powder, Ti powder, Si powder and cathode copper powder are placed in the ball mill, mix powder 12h with the speed of 120r/min, each raw material usage ratio is the cathode copper powder by weight percentage: Mn powder: Ti powder: Si powder: aluminium powder=93: 2: 3: 1: 1; Along laterally carrying out unidirectional compacting, pressure 900MPa is prepared into the acid bronze alloy base on the omnipotent oil pressure experimental machine at 60 tons under the room temperature; Carry out sintering then in push-down hydrogen shield stove, sintering temperature remains on 950 ℃, and temperature retention time is 5h, cools off with stove; make the acid bronze alloy base, be processed into pipe then, its alloying component percentage by weight is for containing Mn2%, and Si 3%; Ti1%, Al1%, surplus is Cu.
Adopt the vacuum electron beam welding to prepare two-part seemless crystallizer sleeve pipe:
Cleaning weld surface accurately processes chromium-zirconium-copper tubes and acid bronze alloy tube contacts face, makes gaping of joints be not more than 0.25mm; Be evacuated to below the 0.133Pa; Adopt the electron beam welding connection behind the preheating weldment, finish the welding of two-part seemless crystallizer sleeve pipe; Welding parameter is: electron beam operating distance 13mm, and electronic beam current 43mA, accelerating potential 170kV, speed of welding 90cm/min welds dark 4mm.
The crystallizer casing size of preparation is that external diameter is 150mm, and last segment length is 150mm, and hypomere is 1050mm, and thickness is 20mm.
Mn powder, aluminium powder, Ti powder, Si powder, Cu-14P alloy powder and cathode copper powder are placed in the ball mill, speed with 120r/min is mixed powder 4h, and each raw material usage ratio is the cathode copper powder by weight percentage: Mn powder: Ti powder: Si powder: aluminium powder: Cu-14P alloy powder=60: 10: 8: 4: 3: 15; Material behind the mixed powder is placed the HIP sintering stove, the powder material of an end is wherein told 5 sections, length overall 10mm, each section adds the cathode copper powder and carries out physical mixed, each section cathode copper composition is increased gradually to the top, top cathode copper composition reaches 95%, and arranges with gradient distribution mode lamination; The phosphorous deoxidize copper tube that generally uses in traditional continuous cast mold is put into the HIP sintering stove, phosphorous deoxidize copper tube is connected with the maximum end of the copper component of mixed-powder, sintering under pressure 1500 atmospheric pressure, temperature remains on 1300 ℃, be incubated 0.5 hour, with the stove cooling, be processed into two-part seemless crystallizer sleeve pipe then.
The crystallizer casing size of preparation is that external diameter is 50mm, and last segment length is 100mm, and hypomere is 600mm, and thickness is 5mm.
Embodiment 8
Mn powder, aluminium powder, Ti powder, Si powder, Cu-14P alloy powder and cathode copper powder are placed in the ball mill, speed with 120r/min is mixed powder 8h, and each raw material usage ratio is the cathode copper powder by weight percentage: Mn powder: Ti powder: Si powder: aluminium powder: Cu-14P alloy powder=80: 4: 2: 3: 1: 10; The material that mixes behind the powder is placed the HIP sintering stove, the powder material of an end is wherein told 3 sections, length overall 5mm, each section adds the cathode copper powder and carries out physical mixed, each section cathode copper composition is increased gradually to the top, and top reaches 85%, and arranges with gradient distribution mode lamination; The chromium-copper pipe that generally uses in traditional continuous cast mold is put into the HIP sintering stove, the chromium-copper pipe is connected with the maximum end of the copper component of mixed-powder, sintering under pressure 1200 atmospheric pressure, temperature remains on 1000 ℃, be incubated 6 hours, with the stove cooling, be processed into two-part seemless crystallizer sleeve pipe then.
The crystallizer casing size of preparation is that external diameter is 200mm, and last segment length is 200mm, and hypomere is 1300mm, and thickness is 25mm.
Embodiment 9
Mn powder, aluminium powder, Ti powder, Si powder and cathode copper powder are placed in the ball mill, mix powder 12h with the speed of 120r/min, each raw material usage ratio is the cathode copper powder by weight percentage: Mn powder: Ti powder: Si powder: aluminium powder=91: 4: 2: 2: 1; Material behind the mixed powder is placed the HIP sintering stove, the chromium-zirconium-copper tubes that generally uses in traditional continuous cast mold is put into the HIP sintering stove, chromium-zirconium-copper tubes is connected with mixed-powder, sintering under pressure 900 atmospheric pressure, temperature remains on 800 ℃, be incubated 10 hours,, be processed into two-part seemless crystallizer sleeve pipe then with the stove cooling.
The crystallizer casing size of preparation is that external diameter is 100mm, and last segment length is 100mm, and hypomere is 800mm, and thickness is 10mm.
Claims (7)
1, a kind of soft-contact electromagnetic continuous casting manufacture method of two-part seemless crystallizer sleeve pipe, it is characterized in that manufacture method may further comprise the steps: (1) adopts vacuum induction heating melting and casting method or powder metallurgic method to prepare the acid bronze alloy pipe, wherein the step of vacuum induction heating melting and casting method is: the black-fead crucible of the electrolysis copper billet being put into vacuum induction melting furnace, with the Cu-50Mn alloy, metallic aluminium, the Ti-50Si alloy, Si grain and Cu-14P alloy are placed in the material alloying device on bell top, and each raw material usage ratio is cathode copper by weight percentage: Cu-50Mn alloy: Ti-50Si alloy: Si grain: metallic aluminium: Cu-14P alloy=50～91: 4～20: 2～8: 2～4: 1～3: 0～15; In vacuum induction melting furnace, vacuumize, when reaching 0.133Pa, vacuum begins to heat up, be heated to more than 1300 ℃, after the electrolysis copper billet is all melted, add Cu-50Mn alloy, metallic aluminium, Ti-50Si alloy, Si grain and Cu-14P alloy successively, keeping the vacuum in the stove is 0.133Pa, material is all melted insulation 20～30min; Stir then and come out of the stove, be poured in the metal pattern, be prepared into the acid bronze alloy base, be processed into pipe then; The step of powder metallurgic method is: Mn powder, aluminium powder, Ti powder, Si powder, Cu-14P alloy powder and cathode copper powder are placed in the ball mill, speed with 120r/min is mixed powder 4～12h, and each raw material usage ratio is the cathode copper powder by weight percentage: Mn powder: Si powder: Ti powder: aluminium powder: Cu-14P alloy powder=60～93: 2～10: 3～8: 1～4: 1～3: 0～15; Along laterally carrying out unidirectional compacting, pressure 400～900Mpa is prepared into the acid bronze alloy base on the omnipotent oil pressure experimental machine at 60 tons under the room temperature; Carry out sintering then in push-down hydrogen shield stove, sintering temperature remains on 850～950 ℃, and temperature retention time is 1～5h, with the stove cooling, is prepared into the acid bronze alloy base, is processed into pipe then; (2) acid bronze alloy pipe and copper effective tungsten argon arc welding, vacuum electron beam welding, vacuum brazing method or the explosive welding (EW) connection with preparation connects into two-part seemless crystallizer sleeve pipe; The material of described copper pipe is the copper tube material that generally uses in traditional continuous cast mold, is meant phosphorized copper, chromium-copper or chromium zirconium copper.
2, the soft-contact electromagnetic continuous casting according to claim 1 manufacture method of two-part seemless crystallizer sleeve pipe, the material of acid bronze alloy tube portion that it is characterized in that described two-part seemless crystallizer sleeve pipe is by weight percentage for containing Mn2～10%, Si 3～8%, Al 1～3%, Ti 1～4%, P 0～2.1%, and surplus is the copper-based alloy material of copper.
3, soft-contact electromagnetic continuous casting according to claim 1 is with the manufacture method of two-part seemless crystallizer sleeve pipe, and it is characterized in that the tungsten argon arc welding of described two-part seemless crystallizer sleeve pipe: with acid bronze alloy pipe and to be welded root face of copper pipe is 0.5mm; Remove in the groove and oil, rust and other dirt of pipe bevel end outer surface 20mm scope,, clean this place with acetone again to exposing metallic luster; Carry out backing welding and cosmetic welding respectively, welding parameter is: electric current 90-100A, voltage 10-12V, argon flow amount 6-8L/min, tungsten electrode diameter 2.5mm.
4, the soft-contact electromagnetic continuous casting according to claim 1 manufacture method of two-part seemless crystallizer sleeve pipe, the vacuum electron beam welding that it is characterized in that described two-part seemless crystallizer sleeve pipe: the weld surface of cleaning acid bronze alloy pipe and copper pipe, accurately processing two copper pipe contact-making surfaces make gaping of joints be not more than 0.25mm; Be evacuated to below the 0.133Pa; The preheating weldment; Electron beam welding, welding parameter is: electron beam operating distance 13mm, electronic beam current 43mA, accelerating potential 170kV, speed of welding 90cm/min welds dark 4mm.
5, soft-contact electromagnetic continuous casting according to claim 1 is characterized in that the vacuum brazing method of described two-part seemless crystallizer sleeve pipe: the surface of cleaning acid bronze alloy pipe to be welded and copper pipe with the manufacture method of two-part seemless crystallizer sleeve pipe; Adopt cutting slot that copper pipe is fixed; Place solder, be coated with stop-off gent; Be evacuated to below the 0.133Pa; Clean surface after the soldering.
6, the soft-contact electromagnetic continuous casting according to claim 1 manufacture method of two-part seemless crystallizer sleeve pipe, the explosive welding (EW) connection that it is characterized in that described two-part seemless crystallizer sleeve pipe: ready acid bronze alloy pipe and copper pipe, by hand or mechanical means the faying face for the treatment of of metal material is carried out Cress, make surface roughness≤12.5 μ m; The powder type explosive stacking and load is convenient in selection, carries out explosive welding; Wherein the acid bronze alloy pipe is as the epimere of crystallizer sleeve pipe, and copper pipe is as the hypomere of crystallizer sleeve pipe.
7, a kind of soft-contact electromagnetic continuous casting manufacture method of two-part seemless crystallizer sleeve pipe, it is characterized in that manufacture method may further comprise the steps: Mn powder, aluminium powder, Ti powder, Si powder, Cu-14P alloy powder and cathode copper powder are placed in the ball mill, speed with 120r/min is mixed powder 4～12h, and each raw material usage ratio is the cathode copper powder by weight percentage: Mn powder: Si powder: Ti powder: aluminium powder: Cu-14P alloy powder=60～93: 2～10: 3～8: 1～4: 1～3: 0～15; Material behind the mixed powder is placed the HIP sintering stove, the powder material of one end is told 0～5 section, length overall 0～10mm, each section add the cathode copper powder and carry out physical mixed, when copper pipe is put into the HIP sintering stove, be connected with the maximum end of the copper component of mixture of powders, sintering under pressure 900～1500 atmospheric pressure, temperature remain on 800～1300 ℃, are incubated 0.5～10 hour, with the stove cooling, be processed into two-part seemless crystallizer sleeve pipe then; When adding cathode copper powder carried out physical mixed, each section cathode copper composition increased gradually to the top, and the maximum end of copper component reaches 75～95%, and arranges with gradient distribution mode lamination; The material of the epimere of described two-part seemless crystallizer sleeve pipe is by weight percentage for containing the copper-based alloy material of Mn 2～10%, Si 3～8%, Al 1～3%, Ti 1～4%, P 0～2.1%, hypomere is copper pipe, the material of described copper pipe is the copper tube material that generally uses in traditional continuous cast mold, is meant phosphorized copper, chromium-copper or chromium zirconium copper.
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| CN102198493A (en) * | 2010-03-22 | 2011-09-28 | 大连大山结晶器有限公司 | Method for manufacturing slab continuous casting mould |
| CN102371348B (en) * | 2010-08-26 | 2013-04-03 | 宝山钢铁股份有限公司 | Electromagnetic soft contact continuous casting crystallizer |
| CN103028714B (en) * | 2011-09-30 | 2014-07-30 | 鞍钢股份有限公司 | Method for controlling dynamic state of electromagnetic braking process parameter of crystallizer |
| CN104141065A (en) * | 2014-08-13 | 2014-11-12 | 陕西斯瑞工业有限责任公司 | Precision casting technique for copper-alloy casting |
| CN106350683A (en) * | 2016-08-31 | 2017-01-25 | 陕西斯瑞新材料股份有限公司 | Method for preparing CuCr contact materials by means of vacuum self-consuming arc melting |
| CN109207792B (en) * | 2018-10-30 | 2019-09-17 | 东北大学 | The soft contact two-part copper alloy crystallizer of high magnetic permeability and its preparation and application |
| CN114434039A (en) * | 2021-01-15 | 2022-05-06 | 重庆理工大学 | Welding flux for low-temperature interconnection of copper and aluminum dissimilar materials and welding method |
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