CN101966564B - Hot-cold combined casting mould horizontal continuous casting equipment of cupronickel tubing and technology thereof - Google Patents
Hot-cold combined casting mould horizontal continuous casting equipment of cupronickel tubing and technology thereof Download PDFInfo
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Abstract
The invention provides hot-cold combined casting mould horizontal continuous casting equipment of cupronickel tubing and a technology thereof. The equipment comprises a smelting system for melting metal, a heat insulation system for storing molten metal, a horizontal continuous casting system for casting and shaping and an auxiliary system, wherein in the continuous casting system, the front end of a cold shaping section is provided with a hot shaping section so as to effectively control the solid-liquid interface of a tube billet to be located near the juncture of a cold section and a hot section; a shorter water-cooling copper bush and electromagnetic induction heating are adopted to reasonably design coil structure and the power and the frequency of a heating power supply, reduce electromagnetic constraint force to balance the hydrostatic pressure of a metal fusant, reduce friction between a primary kish and the casting mould, improve the surface quality of the tube billet and prolong the service life of the casting mould. Thus, the inner surface and the outer surface of the tube billet manufactured by the invention have good quality and no defects of orange peel, wrinkles, cracks and the like, net shape continuous casting is realized, the production efficiency and the metal yield are improved and the production cost is obviously lowered.
Description
Technical field
The invention belongs to technical field of material, a kind of copper-nickel alloy tubing cold combination casting mold horizontal continuous casting equipment of heat and technology thereof particularly are provided.
Background technology
The copper-nickel alloy alloy has higher intensity and excellent corrosion resisting property; Be good heat exchange material and the structural materials in field such as thermoelectricity, boats and ships, desalinization, its tubing goods are widely used in the anti-corrosion high occasion of degree that requires as condenser pipe, heat exchanger tube etc.Wherein, BFe10-1-1 and BFe30-1-1 (being called for short B10 and B30 respectively) are two kinds of representational copper-nickel alloy alloys, and the market demand of its tubing is bigger.
At present, the tube-making process (being called for short the method for rolling of squeezing) of " the solid ingot casting of D.C.casting-hot extrusion pipe-semi-finished product stretching (or cold rolling)-finished product stretches " is mainly adopted in the production of copper-nickel alloy alloy pipe both at home and abroad, because stretching/cold rolling pass is many; Add technologies such as pickling, intermediate annealing, its total manufacturing procedure nearly more than 20 passage [is seen: Guo Li, Li Yaoqun; The condenser pipe production technology; P.30～32, metallurgical industry publishing house, 2007].The subject matter that this technology exists is: (1) technological process is long, and operation is numerous and diverse, and energy consumption is high, and lumber recovery is low, and cost is high; (2) because copper-nickel alloy alloy high-temp yield strength is high, need extrusion tube blank at high temperature, have that burning is serious, an eccentric problem such as scrap of pipe, influence recovery rate of iron and yield rate; (3) because alloy nickel content is higher, and high temperature viscosity is bigger, so extrusion die, pecker, recipient etc. damage sticking copper easily and make the pipe surface produce serious pipe, interlayer and draw defective such as ditch deeply, have reduced the extrusion tube blank yield rate; (4) cc billet surface quality is relatively poor, the processing that need strip off the skin, and how much losses end to end when adding extruding are bigger, reduced the geometry recovery rate of tubing; (5) because adopt extrusion to produce pipe, pipe length is restricted, so be not suitable for producing heavy, the long size copper-nickel alloy of big volume tubing.These problems have caused the lumber recovery of copper-nickel alloy tubing low (domestic be about 45%～50%, also have only 60%～65% abroad), and production cost is high, has seriously restricted its more massive commercial Application.
For energy-saving and cost-reducing, improve lumber recovery and reduce cost, adopt advanced abbreviated system to produce emphasis and direction that the copper-nickel alloy alloy pipe becomes the Recent study exploitation.The main production method of having developed at present has: and (1) " horizontal casting hollow bloom-rolling-dish draws or vertical pulling " [see: Li Honglei, Lou Huafen, the Marko is fixed, copper processing technology question and answer, P.289～290, metallurgical industry publishing house, 2008]; (2) " continuous directional solidification prepares minor diameter thin wall pipe-dish and draws " [seeing: Xie Jianxin, Lou Huafen, Wang Zidong etc., the short flow preparation technology of copper and copper alloy precision tube, Chinese invention patent, ZL200710065281.9,2009-06-10].
Above-mentioned first method is to adopt water mold (water-cooled mold, casting mold material are graphite) to carry out horizontal casting,
Direct forming heavy wall copper-nickel alloy pipe, replace traditional " the solid ingot casting of D.C.casting-hot extrusion pipe " technology, thereby technological process is shortened significantly, lumber recovery obviously improves, but is also had following subject matter:
(1) the continuously cast billet for pipe-making surface quality is relatively poor
During light water cooling crystallizer continuous casting, the freezing interface of pipe is positioned at crystallizer inside, and pipe scull and casting mold contact length are big, and the contact surface friction is big, and continuously cast billet for pipe-making is prone to produce defectives such as surfaces externally and internally tangerine peel, segregation knurl, micro-crack, fold.Mill face processing though adopt, but the casting flaw of outer surface eliminated, but internal surface of bloom defective (like the inner surface fold) can't be carried out the machined elimination, is brought into following process, has a strong impact on product quality stability and lumber recovery.
(2) the flourishing wall thickness direction columanar structure of continuously cast billet for pipe-making
The bigger pipe of wall thickness because common horizontal casting can only be shaped radially dispels the heat when solidifying significantly, and the gained pipe is organized as flourishing radially columanar structure [to be seen: Li Xintao; Li Tingju, Zhang Xingguo etc., horizontal casting BFe10-1-1 White Copper Tubes microstructure and property; Chinese Foundry active cycle collection of thesis, 2004,151-155]; Thisly radially extend axially distortion when the column crystal of growth is unfavorable for rolling, drawing, cause processing characteristics to descend, passes increases.
Second method, continuous directional solidification prepare copper-nickel alloy tubing, and the situation during with common horizontal casting is different, adopt heated mold; Mold temperature is controlled at more than the alloy graining point, through the water spray cooling in the casting mold exit, forms the axial hot-fluid heat radiation with higher temperature gradient, obtains the crystallization edge and [sees: Yu Yeqiu with the oriented freezing organization that the throwing rightabout carries out; Zhao Feng, Li Woguang, the microstructure and property of hot-mold continuous cast BFe30-1-1 White Copper Tubes; Heat processing technique, 2005,11:8-11].The advantage of this method is: solidify solid liquid interface and be positioned near the outlet of crystallizer (pattern of fever), because the frictional force of solidifying between tubing and the mo(U)ld face is very little, can realize that the continuous casting of light-wall pipe is shaped, and shaping pipe surface quality is high, can reach mirror status; Pipe dense structure, casting flaw is few; Different with the radially columanar structure that common horizontal casting is flourishing; It is organized as the continuous columnar of orientation vertically; This tissue [is seen: Zhang Hong follow-up extension processing (rolling, drawing processing) advantageous particularly; The continuous fiber crystalline substance is organized the basic research of pure copper wires preparation, University of Science & Technology, Beijing's doctorate paper, 2003].But the subject matter that the continuous directional solidification method exists is:
(1) continuous casting that can only realize minor diameter (Ф 30～50mm below), thin-walled (below 3～5mm) tubing is shaped, and casting speed is slower, and production efficiency is lower, lacks competitiveness at aspects such as large-scale production;
(2) since solid liquid interface near casting mold outlet, technique controlling difficulty is bigger, occurs the bleedout accident easily.
Summary of the invention
In order to address the above problem; The purpose of this invention is to provide the hot cold combination casting mold of a kind of employing and carried out horizontal casting; Prepared copper-nickel alloy tubing surface quality is good; Need not strip off the skin to handle directly to be used for cold working, and tubing has vertically the brilliant tissue of columnar orientation, is beneficial to following process and is shaped, and can shorten flow process greatly, enhance productivity and the copper-nickel alloy tubing cold combination casting mold horizontal continuous casting equipment of heat and the technology of lumber recovery.
Technical scheme of the present invention is: the cold combination casting mold horizontal continuous casting equipment of a kind of copper-nickel alloy tubing heat, and this equipment comprises the smelting system that is used for the deposite metal, the heat-insulation system of storage molten metal, casting horizontal casting system and accessory system constitute; Wherein, said horizontal casting system comprises that die holder, water spray secondary cooling apparatus, horizontally tracting mechanism, heater, casting mold, plug and water cooling copper sleeve form; Wherein, Said casting mold one end and said die holder are affixed; Said plug is assemblied in the said casting mold; Said casting mold is assemblied in said casting mold heater and the said water cooling copper sleeve, and said water spray secondary cooling apparatus and said horizontally tracting mechanism are successively set on the said casting mold other end and are distributed on the same axis along the continuous casting direction;
Said casting mold and said casting mold heater constitute bringing-up section, reach more than the copper-nickel alloy alloy melting point in order to guarantee mold temperature; Said casting mold and said water cooling copper sleeve and recirculated cooling water constitute cooling section, realize the solidification forming of pipe; Can obtain enough big thermograde at cold and hot section intersection by bringing-up section and the cold section hot cold combination casting mold of forming, thereby guarantee that there is enough big axial-temperature gradient in forward position, pipe freezing interface, obtain the tissue of orientation vertically.
Another object of the present invention provides a kind of technology of using the cold combination casting mold horizontal continuous casting equipment of above-mentioned copper-nickel alloy tubing heat, specifically may further comprise the steps:
Step 1: with mass percent is that 9.0～32.0% electrolytic nickel, pure iron, the mass percent that mass percent is 0.5～1.5 % are that Mn 0.5～1.2% and surplus cathode copper add in the melting furnace; Be heated to 1200～1350 ℃; Molten metal liquid changes in the holding furnace through chute, is 1200～1300 ℃ in the holding furnace temperature, leaves standstill 0.5～1h; Simultaneously, logical inert gas shielding in the holding furnace;
Step 2: after will assembling by the casting apparatus that casting mold heater, water cooling copper sleeve, casting mold, plug are formed, be connected with holding furnace through the die holder that is fixed on the holding furnace;
Step 3: assemble dummy bar, connect the cooling water of water cooling copper sleeve, mention stopper, molten metal gets into casting apparatus through die holder, starts the heating of casting mold heater, and starting haulage gear is that 50～500mm/min begins to prepare copper-nickel alloy tubing with casting speed;
Step 4: the water spray secondary cooling apparatus through the casting mold exit is cooled to room temperature with tubing, and tubing constantly shifts out casting mold under the effect of haulage gear, through the saw cutting device fixed ruler cutting.
Wherein, the temperature of said casting mold heater is 1200～1250 ℃; The cooling water flow of said water cooling copper sleeve is 400～1200L/h; Water spray secondary cooling apparatus flow is 300～800L/h; The pipe diameter Ф 30～150mm of said copper-nickel alloy tubing, wall thickness 3～20mm.
The invention has the advantages that:
1, make the bringing-up section of casting mold remain on (pattern of fever) more than the alloy melting point through heater 14; The cooling section of casting mold adopts water cooling copper sleeve 17 to force cooling (cold mould); Form big thermograde in forward position, pipe freezing interface, set up strong axial heat conduction, the gas and the field trash that not only help separating out enter liquid phase; Improve pipe dense structure degree; And can control the direction of growth of solidified structure, and eliminate the radially columanar structure of common horizontal casting, obtain the crystalline structure of orientation vertically.Result of study shows that the pipe of axial orientation tissue extremely helps the follow-up extensional that extends axially processing (like rolling, drawing).
2, in the continuous casting system of the present invention; On the one hand, through the pattern of fever section being set, can effectively control the solid liquid interface of pipe at cold mould section front end; Be located near the cold and hot section intersection; And through adopting the short water cooling copper sleeve 17 of length, can effectively reduce the frictional force between scull length and scull and the casting mold, improve the surface quality of tubing.On the other hand, when design heater 14, can adopt the electromagnetic induction heating mode; Power and Frequency Design through rational loop construction, heating power supply; Realize that " the soft contact of electromagnetism " constraint is shaped, the hydrostatic pressure of promptly coming the balance metal bath through electromagnetic confinement power reduces the friction between nascent scull and casting mold; Further improve the surface quality of pipe, prolong the service life of casting mold simultaneously.Therefore, the prepared pipe surfaces externally and internally of the present invention is superior in quality, defectives such as no tangerine peel, fold, crackle; Need not mill face and can directly carry out follow-up cold machine-shaping; Realize clean shape continuous casting, improved production efficiency and recovery rate of iron, significantly reduce production costs.
3, copper-nickel alloy alloy thermal conductivity factor is relatively low; Adopt conventional hot-mold continuous cast (continuous directional solidification); Can only produce the tubing of diameter less (below Ф 30～50mm), thin and thick very thin (below 3～5mm), and casting speed is slow, casting process is prone to the bleedout accident.In the continuous casting process of the present invention; The solid liquid interface of pipe is controlled in the zone of casting mold bringing-up section and cooling section near interface; When technological parameter fluctuations such as casting speed, pipe solid liquid interface position can be in cooling section changes in a big way and the bleedout accident can not occur.These characteristics had both helped adopting bigger casting speed to carry out continuous casting, also helped improving axial-temperature gradient, realized the continuous casting
than major diameter (more than diameter Ф 50mm) and big (more than the 5mm) tubing of wall thickness.
Description of drawings:
Below in conjunction with accompanying drawing equipment of the present invention is further described:
Fig. 1 is the structural representation of the cold combination casting mold horizontal continuous casting equipment of a kind of copper-nickel alloy tubing heat of the present invention.
Fig. 2 is the structural representation of continuous casting system of the present invention.
Among the figure:
| 1. melting furnace | 11. tubing |
| 2. reclining |
12. saw |
| 3. |
13. |
| 4. holding furnace | 14. casting |
| 5. protective gas |
15. |
| 6. stopper | 16. plug |
| 7. die holder | 17. water cooling copper sleeve |
| 8. horizontal casting system | I. bringing-up |
| 9. water spray secondary cooling apparatus | II. |
| 10. horizontally tracting mechanism | ? |
The specific embodiment:
Below in conjunction with accompanying drawing and embodiment technical scheme of the present invention is further specified.
Fig. 1,2 is depicted as the structural representation of the cold combination casting mold horizontal continuous casting equipment of a kind of copper-nickel alloy tubing heat of the present invention.The cold combination casting mold horizontal continuous casting equipment of a kind of copper-nickel alloy tubing heat of the present invention as shown in Figure 1, this equipment has smelting system, heat-insulation system, continuous casting system and accessory system to constitute;
Wherein, Melting systems is made up of melting furnace 1, reclining device 2 and rail plate 13; Continuous casting system is made up of casting mold heater, water cooling copper sleeve, water spray secondary cooling apparatus, die holder, casting mold, plug and haulage gear, and accessory system is made up of protective gas device and saw cutting device;
Wherein, melting furnace 1 is installed on the rail plate 13 through reclining device 2, and rail plate is installed on the pedestal, and base height can be according to the height adjustment of equipment; The liquid outlet of melting furnace 1 cooperates with chute 3; Chute 3 is communicated with holding furnace 4; Holding furnace 4 places on the ground, and 5 are placed on the bell of holding furnace 4, and conduit one end inserts the above position of holding furnace 4 interior metal liquid liquid levels; The conduit other end is connected with the protective gas container through gas conduit; Through the molten metal of protective gas air induction conduit in holding furnace protective gas is provided, die holder 7 is fixed on the holding furnace 4 through supported flange, continuous casting system 8 through an end of casting mold 15 with link together through flange and holding furnace 4 again after die holder 7 on being fixed on holding furnace 4 docks; The porch of one end of die holder 7 is provided with stopper 6, and stopper can go up and down through the stopper operating mechanism, and the stopper operating mechanism is installed on the holding furnace 4;
Embodiment 1:Diameter Ф 50mm, the BFe10-1-1 copper-nickel alloy tubing continuous casting of wall thickness 5mm is shaped
Proportioning is Ni 9.0%, and Fe 1.0%, and the electrolytic nickel of Mn 0.5%, pure iron, electrolytic manganese, surplus cathode copper overlay in the melting furnace in order, heat fused, and 1200 ℃ of fusion temperatures, 1200 ℃ of holding furnace temperature,
Pattern of fever (casting mold heating) adopts the high-frequency induction heating mode, heating frequency 50kHz, power 20kW, 1200 ℃ of pattern of fever heating-up temperatures, cold mould cooling water (water cooling copper sleeve) flow 400L/h, hauling speed 200mm/min.Formed thereby copper-nickel alloy tubing specification is the BFe10-1-1 of Ф 50 * 5mm, and internal surface of pipe and outer surface are all smooth, is organized as along the columanar structure of tubing axial orientation mechanical properties of tubular goods=46.3% ,=243MPa.
Embodiment 2:Diameter Ф 150mm, the BFe10-1-1 copper-nickel alloy tubing continuous casting of wall thickness 20mm is shaped
Proportioning is Ni 11.0%, and Fe 1.5%, the electrolytic nickel of Mn 1.0%, pure iron, electrolytic manganese; The surplus cathode copper overlays in the melting furnace in order, heat fused, 1250 ℃ of fusion temperatures; 1250 ℃ of holding furnace temperature, pattern of fever (casting mold heating) adopts the high-frequency induction heating mode, heating frequency 50kHz; Power 20kW, 1200 ℃ of pattern of fever heating-up temperatures, cold mould cooling water flow (water cooling copper sleeve) 1200L/h; Hauling speed 50mm/min, formed thereby tubing surfaces externally and internally, tissue and mechanical property are similar with embodiment 1.
Embodiment 3:Diameter Ф 30mm, the BFe30-1-1 copper-nickel alloy tubing continuous casting of wall thickness 3mm is shaped
Proportioning is Ni 32.0%, and Fe 0.5%, the electrolytic nickel of Mn 1.2%, pure iron, electrolytic manganese, and the surplus cathode copper overlays in the melting furnace in order; Heat fused, 1350 ℃ of fusion temperatures, 1300 ℃ of holding furnace temperature; Pattern of fever (casting mold heating) adopts the high-frequency induction heating mode, heating frequency 50kHz, power 25kW; 1250 ℃ of pattern of fever heating-up temperatures, cold mould cooling water flow (water cooling copper sleeve) 1000L/h, hauling speed 500mm/min; Formed thereby mechanical properties of tubular goods=45.4% ,=348MPa, surfaces externally and internally is similar with embodiment 1 with tissue.
Embodiment 4:Diameter Ф 20mm, the BFe19 copper-nickel alloy tubing continuous casting of wall thickness 3mm is shaped
Proportioning is Ni 18.0%, and Fe 0.5%, the electrolytic nickel of Mn 0.5%, pure iron, electrolytic manganese, and the surplus cathode copper overlays in the melting furnace in order; Heat fused, 1250 ℃ of fusion temperatures, 1280 ℃ of holding furnace temperature; Pattern of fever (casting mold heating) adopts the high-frequency induction heating mode, heating frequency 50kHz, power 25kW; 1230 ℃ of pattern of fever heating-up temperatures, cold mould cooling water flow (water cooling copper sleeve) 600L/h, hauling speed 300mm/min; Formed thereby mechanical properties of tubular goods=45.4% ,=348MPa, surfaces externally and internally is similar with embodiment 1 with tissue.
Embodiment 5:Diameter Ф 30mm, the BFe19 copper-nickel alloy tubing continuous casting of wall thickness 4mm is shaped
Proportioning is Ni 20.0%, and Fe 0.5%, the electrolytic nickel of Mn 0.5%, pure iron, electrolytic manganese, and the surplus cathode copper overlays in the melting furnace in order; Heat fused, 1230 ℃ of fusion temperatures, 1260 ℃ of holding furnace temperature; Pattern of fever (casting mold heating) adopts the high-frequency induction heating mode, heating frequency 50kHz, power 25kW; 1220 ℃ of pattern of fever heating-up temperatures, cold mould cooling water flow (water cooling copper sleeve) 800L/h, hauling speed 100mm/min; Formed thereby mechanical properties of tubular goods=45.4% ,=348MPa, surfaces externally and internally is similar with embodiment 1 with tissue.
Claims (7)
1. the cold combination casting mold horizontal continuous casting equipment of copper-nickel alloy tubing heat, this equipment comprises the Metal Melting system, molten metal thermal insulation system, horizontal casting system (8) and accessory system formation; It is characterized in that; Said horizontal casting system (8) comprises die holder (7), water spray secondary cooling apparatus (9), horizontally tracting mechanism (10), casting mold heater (14), casting mold (15), plug (16) and water cooling copper sleeve (17) composition; Said casting mold (15) one ends and said die holder (7) are affixed; Said plug (16) is assemblied in the said casting mold (15), and said casting mold (15) is assemblied in said casting mold heater (14) and the said water cooling copper sleeve (17); The other end that said water spray secondary cooling apparatus (9) and said haulage gear (10) are successively set on said casting mold (15) is distributed on the same axis along the continuous casting direction;
Said casting mold (15) and said casting mold heater (14) constitute bringing-up section, reach more than the copper-nickel alloy alloy melting point in order to guarantee mold temperature; Said casting mold (15) and said water cooling copper sleeve (17) and recirculated cooling water constitute cooling section, realize the solidification forming of pipe; Can obtain enough big thermograde at cold and hot section intersection by bringing-up section and the cold section hot cold combination casting mold of forming, thereby guarantee that there is enough big axial-temperature gradient in forward position, pipe freezing interface, obtain the tissue of orientation vertically.
2. according to the technology of the cold combination casting mold horizontal continuous casting equipment of the said copper-nickel alloy tubing heat of claim 1, it is characterized in that its concrete steps are following:
Step 1: with mass percent is that 9.0～32.0% electrolytic nickel, pure iron, the mass percent that mass percent is 0.5～1.5 % are that Mn 0.5～1.2% and surplus cathode copper overlay in the melting furnace in order; Be heated to 1200～1350 ℃; Molten metal liquid changes in the holding furnace through chute, is under 1200～1300 ℃ at furnace temperature, leaves standstill 0.5～1h; Simultaneously, logical inert gas shielding in the holding furnace;
Step 2: after the casting apparatus assembling with casting mold heater, water cooling copper sleeve, casting mold, plug, be connected with holding furnace through the die holder that is fixed on the holding furnace;
Step 3: assemble dummy bar, connect the cooling water of water cooling copper sleeve, mention stopper, molten metal gets into casting apparatus through die holder, starts the casting mold heater, and starting haulage gear is that 50～500mm/min begins to prepare copper-nickel alloy tubing with casting speed;
Step 4: the water spray secondary cooling apparatus through the casting mold exit is cooled to room temperature with tubing, and tubing constantly shifts out casting mold under the effect of haulage gear, through the saw cutting device fixed ruler cutting;
Wherein, the temperature of said casting mold heater is 1200～1250 ℃; The cooling water flow of said water cooling copper sleeve is 400～1200L/h; Water spray secondary cooling apparatus flow is 300～800L/h; The pipe diameter Ф 30～150mm of said copper-nickel alloy tubing, wall thickness 3～20mm.
3. according to the technology of the cold combination casting mold horizontal continuous casting equipment of the said copper-nickel alloy tubing heat of claim 2, it is characterized in that its concrete steps are following:
Proportioning is Ni 9.0%, and Fe 1.0%, the electrolytic nickel of Mn 0.5%, pure iron, electrolytic manganese, and the surplus cathode copper overlays in the melting furnace in order; Heat fused, 1200 ℃ of fusion temperatures, 1200 ℃ of holding furnace temperature; Adopt the high-frequency induction heating mode, heating frequency 50kHz, power 20kW; 1200 ℃ of pattern of fever heating-up temperatures, the cold mould cooling water flow 400L/h of water cooling copper sleeve, the hauling speed of horizontally tracting mechanism is 200mm/min; Formed thereby copper-nickel alloy tubing specification is the BFe10-1-1 of Ф 50 * 5mm, and internal surface of pipe and outer surface are all smooth, are organized as along the columanar structure of tubing axial orientation.
4. according to the technology of the cold combination casting mold horizontal continuous casting equipment of the said copper-nickel alloy tubing heat of claim 2, it is characterized in that its concrete steps are following:
Proportioning is Ni 11.0%, and Fe 1.5%, the electrolytic nickel of Mn 1.0%, pure iron, electrolytic manganese; The surplus cathode copper overlays in the melting furnace in order, heat fused, 1250 ℃ of fusion temperatures; 1250 ℃ of holding furnace temperature adopt the high-frequency induction heating mode, heating frequency 50kHz; Power 20kW, 1200 ℃ of pattern of fever heating-up temperatures, the cold mould cooling water flow 1200L/h of water cooling copper sleeve; The hauling speed of horizontally tracting mechanism is 50mm/min, and the specification of formed thereby tubing is diameter Ф 150mm, the BFe10-1-1 copper-nickel alloy tubing of wall thickness 20mm.
5. according to the technology of the cold combination casting mold horizontal continuous casting equipment of the said copper-nickel alloy tubing heat of claim 2, it is characterized in that its concrete steps are following:
Proportioning is Ni 32.0%, and Fe 0.5%, the electrolytic nickel of Mn 1.2%, pure iron, electrolytic manganese; The surplus cathode copper overlays in the melting furnace in order, heat fused, 1350 ℃ of fusion temperatures; 1300 ℃ of holding furnace temperature adopt the high-frequency induction heating mode, heating frequency 50kHz; Power 25kW, 1250 ℃ of pattern of fever heating-up temperatures, the cold mould cooling water flow 1000L/h of water cooling copper sleeve; The hauling speed of horizontally tracting mechanism is 500mm/min, and the specification of formed thereby tubing is diameter Ф 30mm, the BFe30-1-1 copper-nickel alloy tubing of wall thickness 3mm.
6. according to the technology of the cold combination casting mold horizontal continuous casting equipment of the said copper-nickel alloy tubing heat of claim 2, it is characterized in that its concrete steps are following:
Proportioning is Ni 18.0%, and Fe 0.5%, the electrolytic nickel of Mn 0.5%, pure iron, electrolytic manganese, and the surplus cathode copper overlays in the melting furnace in order; Heat fused, 1250 ℃ of fusion temperatures, 1280 ℃ of holding furnace temperature; Adopt the high-frequency induction heating mode, heating frequency 50kHz, power 25kW; 1230 ℃ of pattern of fever heating-up temperatures, the cold mould cooling water flow 600L/h of water cooling copper sleeve, hauling speed 300mm/min.
7. according to the technology of the cold combination casting mold horizontal continuous casting equipment of the said copper-nickel alloy tubing heat of claim 2, it is characterized in that its concrete steps are following:
Proportioning is Ni 20.0%, and Fe 0.5%, the electrolytic nickel of Mn 0.5%, pure iron, electrolytic manganese; The surplus cathode copper overlays in the melting furnace in order, heat fused, 1230 ℃ of fusion temperatures; The holding furnace temperature adopts the high-frequency induction heating mode for 1260 ℃, heating frequency 50kHz, power 25kW; 1220 ℃ of pattern of fever heating-up temperatures, the cold mould cooling water flow 800L/h of water cooling copper sleeve, hauling speed 100mm/min.
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| CN2010105014074A CN101966564B (en) | 2010-10-09 | 2010-10-09 | Hot-cold combined casting mould horizontal continuous casting equipment of cupronickel tubing and technology thereof |
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