CN110229973A - H-type chromium-zirconium-copper crystallizer copper pipe production technology - Google Patents
H-type chromium-zirconium-copper crystallizer copper pipe production technology Download PDFInfo
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- CN110229973A CN110229973A CN201910534817.XA CN201910534817A CN110229973A CN 110229973 A CN110229973 A CN 110229973A CN 201910534817 A CN201910534817 A CN 201910534817A CN 110229973 A CN110229973 A CN 110229973A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/057—Manufacturing or calibrating the moulds
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
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Abstract
A kind of H-type chromium-zirconium-copper crystallizer copper pipe production technology, the following steps are included: being (1) that Cu prepares chrome zirconium copper alloy round bar by composition proportion (weight %): Cr0.8-1, Zr0.1-0.3, surplus, (2) hot extrusion molding H-type chromium-zirconium-copper crystallizer copper blank, (3) make annealing treatment for the first time, (4) copper pipe blank shaping, (5) make annealing treatment for second, (6) wall thickness is thinned for the first time and extends deformation for copper pipe blank, (7) solution treatment, (8) copper pipe blank second is thinned wall thickness and extends deformation, (9) crash handling, (10) Milling Process, (11) copper pipe Composite Coatings.The present invention improves the non-deformability and mechanical performance of H-type chromium-zirconium-copper crystallizer copper pipe, to improve the service life of H-type chromium-zirconium-copper crystallizer copper pipe by the optimization of optimization and processing technology to H-type chromium-zirconium-copper crystallizer copper pipe basis material chemical component.
Description
Technical field
The present invention relates to the crystallizer copper pipes that continuous casting of metal uses, and in particular to a kind of H-type chromium-zirconium-copper crystallizer copper
Pipe production technology.
Background technique
Crystallizer copper pipe is the core component on conticaster.H-type base continuous casting, Neng Gou great are realized using H-type crystallizer copper pipe
The big production efficiency for improving H profile steel, reduces energy loss, rapidly develops the main production method for becoming H profile steel in recent years, thus H
The demand of type crystallizer copper pipe also increasingly increases therewith.The service life of crystallizer copper pipe depends primarily on crystallizer copper pipe
The manufacture level of material and copper pipe has H-type crystallizer copper pipe since H-type Cross Section of CC Billet has certain complexity
Relatively higher quality requirement.Current H-type crystallizer copper pipe mostly uses yellow gold as crystallizer copper pipe production material, though
The crystallizer copper pipe of right this kind of material has had the manufacturing process of relative maturity, but is limited by material property, crystallizer copper pipe
Service life be difficult to further increase.Relative to silver-bearing copper, the thermal deformation resistant ability of chromium-zirconium-copper is greatly improved, and has gradually
Silver-bearing copper is replaced to become the trend of the main production material of crystallizer copper pipe.
Summary of the invention
The purpose of the present invention is to provide a kind of H-type chromium-zirconium-copper crystallizer copper pipe production technologies, by H-type chromium-zirconium-copper
The optimization of crystallizer copper pipe basis material chemical component and the optimization of processing technology, improve H-type chromium-zirconium-copper crystallizer copper pipe
Non-deformability and mechanical performance, to improve the service life of H-type chromium-zirconium-copper crystallizer copper pipe.
Realizing the technical solution of the object of the invention is: a kind of H-type chromium-zirconium-copper crystallizer copper pipe production technology, including following step
It is rapid:
(1) chrome zirconium copper alloy round bar is prepared: the composition proportion (weight %) of the chrome zirconium copper alloy round bar are as follows: Cr:0.8-1, Zr:
0.1-0.3, surplus Cu；Catholyte copper is added in power frequency induction furnace according to the composition proportion and is heated to 1200 DEG C,
Molten surface is covered using graphite powder, and is adsorbed on gas and impurity floating in melt by power frequency induction furnace swing
Then graphite surface sequentially adds chromium block and zirconium block according to the composition proportion, be then spread in calcium chloride granules entirely
Molten surface, the calcium chloride after making fusing form one layer of liquid film for alloy molten solution and air exclusion in molten surface, continue to add
Hot power frequency induction furnace melts chromium block and zirconium block all to 1300 DEG C, swings power frequency induction furnace, keeps alloying elements distribution uniform,
Then inclination power frequency induction furnace makes chromium-zirconium-copper melt flow into crystallizer by baffle plate, pours the chromium-zirconium-copper conjunction for outpouring required specification
Golden round bar；
(2) hot extrusion molding H-type chromium-zirconium-copper crystallizer copper blank: (1) chrome zirconium copper alloy round bar that step obtains is heated to
900-920 DEG C, it is put into the H-type blank that a hot extrusion molding is solid in mold, then again adds the solid H-type blank again
Heat arrives 880-900 DEG C, carries out backward extrusion using mold, the material returned is cooling, obtains hollow H-type chromium-zirconium-copper crystallizer copper blank；
(3) make annealing treatment for the first time: (2) hollow H-type chromium-zirconium-copper crystallizer copper pipe blank heating that step is obtained to 680-700
DEG C, 2h is kept the temperature, moves into sink and is cooled to 25 DEG C, completes the first time annealing of copper pipe blank；
(4) copper pipe blank shaping: the copper pipe blank for completing annealing for the first time is carried out without deflection on fitting cold extrusion shaping machine
Copper pipe blank shaping, fit closely the core bar of copper pipe blank and molding machine；
(5) second make annealing treatment: the copper pipe blank for completing step (4) shaping being heated to 680~700 DEG C, 2h is kept the temperature, moves into water
It is cooled to 25 DEG C in slot, completes second of annealing of copper pipe blank；
(6) wall thickness is thinned for the first time and extends deformation for copper pipe blank: using fitting cold extrusion shaping machine to completing second of the copper made annealing treatment
Blank, which carries out wall thickness is thinned for the first time, extends deformation, and deflection of extending is 90-92%；
(7) solution treatment: will complete to be thinned the extend copper pipe blank of deformation of wall thickness for the first time and be heated to 930-950 DEG C, keep the temperature 2h,
It moves into sink and is cooled to 25 DEG C, complete the solution treatment of copper pipe blank；
(8) copper pipe blank second is thinned wall thickness and extends deformation: the copper pipe blank using fitting cold extrusion shaping machine to completion solution treatment
Carry out second wall thickness be thinned to extend deformation, deflection of extending is 85-87%, while meets the interior chamber size of copper pipe blank
Drawing requirement；
(9) crash handling: second will be completed the extend copper pipe blank of deformation of wall thickness is thinned to be heated to 460~480 DEG C, heat preservation
1.5h, it is air-cooled, complete the crash handling of copper pipe blank；
(10) monnolithic case milling Milling Process: is carried out to the copper pipe blank for completing crash handling according to design radian and installation dimension
Processing, obtains H-type chromium-zirconium-copper crystallizer copper pipe semi-finished product；
(11) copper pipe Composite Coatings: the inner surface plating nickel cobalt of the H-type chromium-zirconium-copper crystallizer copper pipe semi-finished product (10) obtained in step first is closed
Layer gold obtains H-type chromium-zirconium-copper crystallizer copper pipe then in the chrome-faced layer of the nickel cobalt (alloy) layer.
Above-mentioned H-type chromium-zirconium-copper crystallizer copper pipe production technology, the composition proportion (weight of the chrome zirconium copper alloy round bar
Measure %) are as follows: Cr:0.9, Zr:0.2, surplus Cu.
Above-mentioned H-type chromium-zirconium-copper crystallizer copper pipe production technology, the step (11) in nickel-cobalt plating layer with a thickness of
0.6mm, chrome layer is with a thickness of 0.07mm.
The present invention is improved by the optimization of optimization and processing technology to H-type chromium-zirconium-copper crystallizer copper pipe basis material
The non-deformability and mechanical performance of crystallizer copper pipe.
Chrome zirconium copper alloy of the invention adds the melting mode of coverture using power frequency induction furnace, and production cost is low, while energy
Access the chromium-zirconium-copper crystallizer copper pipe slab of high quality.
The present invention is squeezed to obtain hollow H-type chromium-zirconium-copper crystallizer copper pipe by mold with chrome zirconium copper alloy round bar
Material, can effectively improve production efficiency.
The present invention forms H-type chromium-zirconium-copper crystallizer copper pipe matrix using monnolithic case Milling Process, can guarantee H-type chromium zirconium
The installation dimension and geometric tolerance of Cu crystallizer copper pipe improve product quality.
The present invention obtains H-type chromium-zirconium-copper crystallizer copper pipe in thermal conductivity, non-deformability and mechanical properties
It is greatly improved, significantly improves the service life of H-type crystallizer copper pipe.
Specific embodiment
Embodiment 1
(1) step, prepares chrome zirconium copper alloy round bar: the composition proportion (weight %) of the chrome zirconium copper alloy round bar are as follows: Cr:0.8,
Zr:0.1, surplus Cu.According to the composition proportion, the catholyte copper that weight percent is 99.1% will be accounted for, power frequency is added
It is heated in induction furnace, dispenses the graphite powder that a layer thickness is 10mm in molten surface when being warming up to 1200 DEG C and covered, and lead to
Crossing power frequency induction furnace swing makes gas and impurity floating in melt be adsorbed on graphite surface, then according to the composition proportion
Sequentially adding and accounting for weight percent is 0.8% chromium block and 0.1% zirconium block, and calcium chloride granules are then spread in entire melt table
Face, the calcium chloride after making high temperature melting form one layer of liquid film in molten surface and alloy molten solution and air exclusion are avoided alloy
Melt oxidation.Continuing heating power frequency induction furnace melts chromium block and zirconium block all to 1300 DEG C, swings power frequency induction furnace again,
Keep alloying elements distribution uniform, then tilting power frequency induction furnace makes chromium-zirconium-copper melt flow into crystallizer by baffle plate, pours and outpours
The chrome zirconium copper alloy round bar of required specification.
(2) (1) step, hot extrusion molding H-type chromium-zirconium-copper crystallizer copper blank: is obtained step using box type heater
Chrome zirconium copper alloy round bar is heated to 910 DEG C, is put into mold, uses reality required by hot extrusion molding of Vertical Oil press
Then the H-type blank of the heart is recycled box type heater that the solid H-type blank is reheated to 890 DEG C, is carried out using mold
Backward extrusion, the material returned is cooling, obtains hollow H-type chromium-zirconium-copper crystallizer copper blank with the end.
(3) step, makes annealing treatment: (2) hollow H-type chromium-zirconium-copper crystallizer copper pipe blank heating that step is obtained for the first time
To 690 DEG C, 2h is kept the temperature, moves into sink and is cooled to 25 DEG C, completes the first time annealing of copper pipe blank.Copper pipe after annealing
Blank hardness >=55HB.
Step (4), copper pipe blank shaping: using the fitting cold extrusion shaping machine being made of horizontal (double action) oil hydraulic, external mold and core bar to complete
The copper pipe blank shaping that zero deflection is carried out at the copper pipe blank of first time annealing, makes the core bar of copper pipe blank and molding machine
It fits closely, preliminarily forms required copper pipe blank radian and closing in.
(5), second makes annealing treatment step: the copper pipe blank for completing step (4) shaping being heated to 690 DEG C, 2h is kept the temperature, moves
Enter to be cooled to 25 DEG C in sink, completes second of annealing of copper pipe blank.Copper pipe blank hardness >=55HB after annealing.
(6), wall thickness is thinned for the first time and extends deformation step for copper pipe blank: forming using by horizontal (double action) oil hydraulic, external mold and core bar
Fitting cold extrusion shaping machine be thinned for the first time wall thickness to the copper pipe blank for completing second annealing and extend deformation, copper tube billet
Expect that length is elongated, refine metal grain, deflection of extending is 91%.
(7) step, solution treatment: will complete to be thinned the extend copper pipe blank of deformation of wall thickness for the first time and be heated to 940 DEG C, protect
Warm 2h is moved into sink and is cooled to 25 DEG C, completes the solution treatment of copper pipe blank, copper pipe blank hardness >=50HB after solid solution.
(8), copper pipe blank second is thinned wall thickness and extends deformation step: forming using by horizontal (double action) oil hydraulic, external mold and core bar
Fitting cold extrusion shaping machine carry out second to the copper pipe blank for completing solution treatment wall thickness be thinned extending deformation, deflection of extending
It is 86%, refines copper pipe blank crystal grain further, reaches 0.3-0.5mm, hardness >=100HB, copper pipe blank inner cavity size and core
Bar is completely coincident, and reaches the interior chamber size of requirement.
Step (9), crash handling: by complete second be thinned wall thickness extend deformation copper pipe blank be put into heating it is box plus
It is heated to 470 DEG C in hot stove, keeps the temperature 1.5h, it is air-cooled, complete the crash handling of copper pipe blank.Copper pipe blank after crash handling is hard
Spend >=110 HB.
(10) step, Milling Process: carries out the copper pipe blank for completing crash handling according to design radian and installation dimension whole
External shape Milling Process, obtains H-type chromium-zirconium-copper crystallizer copper pipe semi-finished product.
Step (11), copper pipe Composite Coatings: the inner surface of the H-type chromium-zirconium-copper crystallizer copper pipe semi-finished product (10) obtained in step first
Nickel-cobalt plating layer, nickel-cobalt plating layer is with a thickness of 0.6mm, then in the chrome-faced layer of the nickel cobalt (alloy) layer, chromium plating thickness
Degree is 0.07mm, obtains finished product H-type chromium-zirconium-copper crystallizer copper pipe.
To the H-type chromium-zirconium-copper crystallizer copper pipe detection that embodiment 1 obtains, performance indicator is as follows:
Hardness >=110HB；Conductivity >=90%IACS.
Embodiment 2
(1) step, prepares chrome zirconium copper alloy round bar: the composition proportion (weight %) of the chrome zirconium copper alloy round bar are as follows: Cr:0.9,
Zr:0.2, surplus Cu.According to the composition proportion, the catholyte copper that weight percent is 98.9% will be accounted for, power frequency is added
It is heated in induction furnace, dispenses the graphite powder that a layer thickness is 10mm in molten surface when being warming up to 1200 DEG C and covered, and lead to
Crossing power frequency induction furnace swing makes gas and impurity floating in melt be adsorbed on graphite surface, then according to the composition proportion
Sequentially adding and accounting for weight percent is 0.9% chromium block and 0.2% zirconium block, and calcium chloride granules are then spread in entire melt table
Face, the calcium chloride after making high temperature melting form one layer of liquid film in molten surface and alloy molten solution and air exclusion are avoided alloy
Melt oxidation.Continuing heating power frequency induction furnace melts chromium block and zirconium block all to 1300 DEG C, swings power frequency induction furnace again,
Keep alloying elements distribution uniform, then tilting power frequency induction furnace makes chromium-zirconium-copper melt flow into crystallizer by baffle plate, pours and outpours
The chrome zirconium copper alloy round bar of required specification.
(2) (1) step, hot extrusion molding H-type chromium-zirconium-copper crystallizer copper blank: is obtained step using box type heater
Chrome zirconium copper alloy round bar is heated to 910 DEG C, is put into mold, uses reality required by hot extrusion molding of Vertical Oil press
Then the H-type blank of the heart is recycled box type heater that the solid H-type blank is reheated to 890 DEG C, is carried out using mold
Backward extrusion, the material returned is cooling, obtains hollow H-type chromium-zirconium-copper crystallizer copper blank with the end.
(3) step, makes annealing treatment: (2) hollow H-type chromium-zirconium-copper crystallizer copper pipe blank heating that step is obtained for the first time
To 690 DEG C, 2h is kept the temperature, moves into sink and is cooled to 25 DEG C, completes the first time annealing of copper pipe blank.Copper pipe after annealing
Blank hardness >=60HB.
Step (4), copper pipe blank shaping: using the fitting cold extrusion shaping machine being made of horizontal (double action) oil hydraulic, external mold and core bar to complete
The copper pipe blank shaping that zero deflection is carried out at the copper pipe blank of first time annealing, makes the core bar of copper pipe blank and molding machine
It fits closely, preliminarily forms required copper pipe blank radian and closing in.
(5), second makes annealing treatment step: the copper pipe blank for completing step (4) shaping being heated to 690 DEG C, 2h is kept the temperature, moves
Enter to be cooled to 25 DEG C in sink, completes second of annealing of copper pipe blank.Copper pipe blank hardness >=60HB after annealing.
(6), wall thickness is thinned for the first time and extends deformation step for copper pipe blank: forming using by horizontal (double action) oil hydraulic, external mold and core bar
Fitting cold extrusion shaping machine be thinned for the first time wall thickness to the copper pipe blank for completing second annealing and extend deformation, copper tube billet
Expect that length is elongated, refine metal grain, deflection of extending is 91%.
(7) step, solution treatment: will complete to be thinned the extend copper pipe blank of deformation of wall thickness for the first time and be heated to 940 DEG C, protect
Warm 2h is moved into sink and is cooled to 25 DEG C, completes the solution treatment of copper pipe blank, and the copper pipe blank hardness after solution treatment >=
55HB。
(8), copper pipe blank second is thinned wall thickness and extends deformation step: forming using by horizontal (double action) oil hydraulic, external mold and core bar
Fitting cold extrusion shaping machine carry out second to the copper pipe blank for completing solution treatment wall thickness be thinned extending deformation, deflection of extending
It is 86%, refines copper pipe blank crystal grain further, reaches 0.3-0.5mm, hardness >=105HB, copper pipe blank inner cavity size and core
Bar is completely coincident, and reaches the interior chamber size of requirement.
Step (9), crash handling: by complete second be thinned wall thickness extend deformation copper pipe blank be put into heating it is box plus
It is heated to 470 DEG C in hot stove, keeps the temperature 1.5h, it is air-cooled, complete the crash handling of copper pipe blank.Copper pipe blank after crash handling is hard
Spend >=115 HB.
(10) step, Milling Process: carries out the copper pipe blank for completing crash handling according to design radian and installation dimension whole
External shape Milling Process, obtains H-type chromium-zirconium-copper crystallizer copper pipe semi-finished product.
Step (11), copper pipe Composite Coatings: the inner surface of the H-type chromium-zirconium-copper crystallizer copper pipe semi-finished product (10) obtained in step first
Nickel-cobalt plating layer, nickel-cobalt plating layer is with a thickness of 0.6mm, then in the chrome-faced layer of the nickel cobalt (alloy) layer, chromium plating thickness
Degree is 0.07mm, obtains finished product H-type chromium-zirconium-copper crystallizer copper pipe.
To the H-type chromium-zirconium-copper crystallizer copper pipe detection that embodiment 2 obtains, performance indicator is as follows:
Hardness >=115 HB；Conductivity >=85%IACS.
Embodiment 3
(1) step, prepares chrome zirconium copper alloy round bar: the composition proportion (weight %) of the chrome zirconium copper alloy round bar are as follows: Cr:1,
Zr:0.3, surplus Cu.According to the composition proportion, the catholyte copper that weight percent is 98.7% will be accounted for, power frequency is added
It is heated in induction furnace, dispenses the graphite powder that a layer thickness is 10mm in molten surface when being warming up to 1200 DEG C and covered, and lead to
Crossing power frequency induction furnace swing makes gas and impurity floating in melt be adsorbed on graphite surface, then according to the composition proportion
Sequentially adding and accounting for weight percent is 1% chromium block and 0.3% zirconium block, and calcium chloride granules are then spread in entire melt table
Face, the calcium chloride after making high temperature melting form one layer of liquid film in molten surface and alloy molten solution and air exclusion are avoided alloy
Melt oxidation.Continuing heating power frequency induction furnace melts chromium block and zirconium block all to 1300 DEG C, swings power frequency induction furnace again,
Keep alloying elements distribution uniform, then tilting power frequency induction furnace makes chromium-zirconium-copper melt flow into crystallizer by baffle plate, pours and outpours
The chrome zirconium copper alloy round bar of required specification.
(2) (1) step, hot extrusion molding H-type chromium-zirconium-copper crystallizer copper blank: is obtained step using box type heater
Chrome zirconium copper alloy round bar is heated to 910 DEG C, is put into mold, uses reality required by hot extrusion molding of Vertical Oil press
Then the H-type blank of the heart is recycled box type heater that the solid H-type blank is reheated to 890 DEG C, is carried out using mold
Backward extrusion, the material returned is cooling, obtains hollow H-type chromium-zirconium-copper crystallizer copper blank with the end.
(3) step, makes annealing treatment: (2) hollow H-type chromium-zirconium-copper crystallizer copper pipe blank heating that step is obtained for the first time
To 690 DEG C, 2h is kept the temperature, moves into sink and is cooled to 25 DEG C, completes the first time annealing of copper pipe blank.Copper pipe after annealing
Blank hardness >=65HB.
Step (4), copper pipe blank shaping: using the fitting cold extrusion shaping machine being made of horizontal (double action) oil hydraulic, external mold and core bar to complete
The copper pipe blank shaping that zero deflection is carried out at the copper pipe blank of first time annealing, makes the core bar of copper pipe blank and molding machine
It fits closely, preliminarily forms required copper pipe blank radian and closing in.
(5), second makes annealing treatment step: the copper pipe blank for completing step (4) shaping being heated to 690 DEG C, 2h is kept the temperature, moves
Enter to be cooled to 25 DEG C in sink, completes second of annealing of copper pipe blank.Copper pipe blank hardness >=65HB after annealing.
(6), wall thickness is thinned for the first time and extends deformation step for copper pipe blank: forming using by horizontal (double action) oil hydraulic, external mold and core bar
Fitting cold extrusion shaping machine be thinned for the first time wall thickness to the copper pipe blank for completing second annealing and extend deformation, copper tube billet
Expect that length is elongated, refine metal grain, deflection of extending is 91%.
(7) step, solution treatment: will complete to be thinned the extend copper pipe blank of deformation of wall thickness for the first time and be heated to 940 DEG C, protect
Warm 2h is moved into sink and is cooled to 25 DEG C, completes the solution treatment of copper pipe blank, and the copper pipe blank hardness after solution treatment >=
65HB。
(8), copper pipe blank second is thinned wall thickness and extends deformation step: forming using by horizontal (double action) oil hydraulic, external mold and core bar
Fitting cold extrusion shaping machine carry out second to the copper pipe blank for completing solution treatment wall thickness be thinned extending deformation, deflection of extending
It is 86%, refines copper pipe blank crystal grain further, reaches 0.3-0.5mm, hardness >=110HB, copper pipe blank inner cavity size and core
Bar is completely coincident, and reaches the interior chamber size of requirement.
Step (9), crash handling: by complete second be thinned wall thickness extend deformation copper pipe blank be put into heating it is box plus
It is heated to 470 DEG C in hot stove, keeps the temperature 1.5h, it is air-cooled, complete the crash handling of copper pipe blank.Copper pipe blank after crash handling is hard
Degree >=120HB.
(10) step, Milling Process: carries out the copper pipe blank for completing crash handling according to design radian and installation dimension whole
External shape Milling Process, obtains H-type chromium-zirconium-copper crystallizer copper pipe semi-finished product.
Step (11), copper pipe Composite Coatings: the inner surface of the H-type chromium-zirconium-copper crystallizer copper pipe semi-finished product (10) obtained in step first
Nickel-cobalt plating layer, nickel-cobalt plating layer is with a thickness of 0.6mm, then in the chrome-faced layer of the nickel cobalt (alloy) layer, chromium plating thickness
Degree is 0.07mm, obtains finished product H-type chromium-zirconium-copper crystallizer copper pipe.
To the H-type chromium-zirconium-copper crystallizer copper pipe detection that embodiment 3 obtains, performance indicator is as follows:
Hardness >=120HB；Conductivity >=80%IACS.
Claims (3)
1. a kind of H-type chromium-zirconium-copper crystallizer copper pipe production technology, it is characterised in that the following steps are included:
(1) chrome zirconium copper alloy round bar is prepared: the composition proportion (weight %) of the chrome zirconium copper alloy round bar are as follows: Cr:0.8-1, Zr:
0.1-0.3, surplus Cu；Catholyte copper is added in power frequency induction furnace according to the composition proportion and is heated to 1200 DEG C,
Molten surface is covered using graphite powder, and is adsorbed on gas and impurity floating in melt by power frequency induction furnace swing
Then graphite surface sequentially adds chromium block and zirconium block according to the composition proportion, be then spread in calcium chloride granules entirely
Molten surface, the calcium chloride after making fusing form one layer of liquid film for alloy molten solution and air exclusion in molten surface, continue to add
Hot power frequency induction furnace melts chromium block and zirconium block all to 1300 DEG C, swings power frequency induction furnace, keeps alloying elements distribution uniform,
Then inclination power frequency induction furnace makes chromium-zirconium-copper melt flow into crystallizer by baffle plate, pours the chromium-zirconium-copper conjunction for outpouring required specification
Golden round bar；
(2) hot extrusion molding H-type chromium-zirconium-copper crystallizer copper blank: (1) chrome zirconium copper alloy round bar that step obtains is heated to
900-920 DEG C, it is put into the H-type blank that a hot extrusion molding is solid in mold, then again adds the solid H-type blank again
Heat arrives 880-900 DEG C, carries out backward extrusion using mold, the material returned is cooling, obtains hollow H-type chromium-zirconium-copper crystallizer copper blank；
(3) make annealing treatment for the first time: (2) hollow H-type chromium-zirconium-copper crystallizer copper pipe blank heating that step is obtained to 680-700
DEG C, 2h is kept the temperature, moves into sink and is cooled to 25 DEG C, completes the first time annealing of copper pipe blank；
(4) copper pipe blank shaping: the copper pipe blank for completing annealing for the first time is carried out without deflection on fitting cold extrusion shaping machine
Copper pipe blank shaping, fit closely the core bar of copper pipe blank and molding machine；
(5) second make annealing treatment: the copper pipe blank for completing step (4) shaping being heated to 680~700 DEG C, 2h is kept the temperature, moves into water
It is cooled to 25 DEG C in slot, completes second of annealing of copper pipe blank；
(6) wall thickness is thinned for the first time and extends deformation for copper pipe blank: using fitting cold extrusion shaping machine to completing second of the copper made annealing treatment
Blank, which carries out wall thickness is thinned for the first time, extends deformation, and deflection of extending is 90-92%；
(7) solution treatment: will complete to be thinned the extend copper pipe blank of deformation of wall thickness for the first time and be heated to 930-950 DEG C, keep the temperature 2h,
It moves into sink and is cooled to 25 DEG C, complete the solution treatment of copper pipe blank；
(8) copper pipe blank second is thinned wall thickness and extends deformation: the copper pipe blank using fitting cold extrusion shaping machine to completion solution treatment
Carry out second wall thickness be thinned to extend deformation, deflection of extending is 85-87%, while meets the interior chamber size of copper pipe blank
Drawing requirement；
(9) crash handling: second will be completed the extend copper pipe blank of deformation of wall thickness is thinned to be heated to 460~480 DEG C, heat preservation
1.5h, it is air-cooled, complete the crash handling of copper pipe blank；
(10) monnolithic case milling Milling Process: is carried out to the copper pipe blank for completing crash handling according to design radian and installation dimension
Processing, obtains H-type chromium-zirconium-copper crystallizer copper pipe semi-finished product；
(11) copper pipe Composite Coatings: the inner surface plating nickel cobalt of the H-type chromium-zirconium-copper crystallizer copper pipe semi-finished product (10) obtained in step first is closed
Layer gold obtains H-type chromium-zirconium-copper crystallizer copper pipe then in the chrome-faced layer of the nickel cobalt (alloy) layer.
2. H-type chromium-zirconium-copper crystallizer copper pipe production technology according to claim 1, it is characterised in that: the chromium-zirconium-copper is closed
The composition proportion (weight %) of golden round bar are as follows: Cr:0.9, Zr:0.2, surplus Cu.
3. H-type chromium-zirconium-copper crystallizer copper pipe production technology according to claim 1, it is characterised in that: the step (11) in
Nickel-cobalt plating layer with a thickness of 0.6mm, chrome layer is with a thickness of 0.07mm.
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| JP2008255381A (en) * | 2007-03-30 | 2008-10-23 | Kobelco & Materials Copper Tube Inc | Heat resistant and high strength copper alloy tube for heat exchanger |
| CN103567402A (en) * | 2012-07-19 | 2014-02-12 | 常州市武进长虹结晶器有限公司 | Production process for chromium-zirconium-copper copper pipes |
| CN107008769A (en) * | 2017-05-10 | 2017-08-04 | 常州市武进长虹结晶器有限公司 | The preparation method of crystallizer copper pipe |
| CN108465714A (en) * | 2018-03-28 | 2018-08-31 | 秦皇岛瀚丰长白结晶器有限责任公司 | Crystallizer copper pipe upsetting squeeze one-shot forming technique |
| US20180291491A1 (en) * | 2016-09-29 | 2018-10-11 | Uacj Corporation | Highly corrosion-resistant copper tube |
| CN109385555A (en) * | 2018-12-04 | 2019-02-26 | 广东华兴换热设备有限公司 | A kind of Cu-Cr-Zr alloy and preparation method thereof |
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| JP2008255381A (en) * | 2007-03-30 | 2008-10-23 | Kobelco & Materials Copper Tube Inc | Heat resistant and high strength copper alloy tube for heat exchanger |
| CN103567402A (en) * | 2012-07-19 | 2014-02-12 | 常州市武进长虹结晶器有限公司 | Production process for chromium-zirconium-copper copper pipes |
| US20180291491A1 (en) * | 2016-09-29 | 2018-10-11 | Uacj Corporation | Highly corrosion-resistant copper tube |
| CN107008769A (en) * | 2017-05-10 | 2017-08-04 | 常州市武进长虹结晶器有限公司 | The preparation method of crystallizer copper pipe |
| CN108465714A (en) * | 2018-03-28 | 2018-08-31 | 秦皇岛瀚丰长白结晶器有限责任公司 | Crystallizer copper pipe upsetting squeeze one-shot forming technique |
| CN109385555A (en) * | 2018-12-04 | 2019-02-26 | 广东华兴换热设备有限公司 | A kind of Cu-Cr-Zr alloy and preparation method thereof |
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