CN106180618A - A kind of can crystal grain refinement upper-drawing casting device and up casting method - Google Patents
A kind of can crystal grain refinement upper-drawing casting device and up casting method Download PDFInfo
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- CN106180618A CN106180618A CN201610839792.0A CN201610839792A CN106180618A CN 106180618 A CN106180618 A CN 106180618A CN 201610839792 A CN201610839792 A CN 201610839792A CN 106180618 A CN106180618 A CN 106180618A
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- feed tube
- molten metal
- crystal grain
- inlet opening
- cooler
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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
- B22D11/14—Plants for continuous casting
- B22D11/145—Plants for continuous casting for upward casting
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Abstract
The invention discloses a kind of can crystal grain refinement upper-drawing casting device, including the foundry furnace for holding molten metal, up casting machine and be arranged at the cooler in described foundry furnace and feed tube, wherein, described up casting machine is arranged at the top of described cooler, described feed tube penetrates described cooler from the bottom of described cooler and fixes, at least one circle inlet opening is offered in described feed tube bottom end seal, sidewall circumference, often circle inlet opening is provided with several inlet openings, each described inlet opening axially the most tangent with the inwall of described feed tube；Also disclose a kind of up casting method.Above-mentioned casting device and casting method, helically formula, molten metal formation strong convection realization stirring when molten metal enters feed tube by inlet opening, limit and destroy dendritic growth, beneficially crystal grain refinement；The spiral molten metal entered, the thermograde making crystallization front molten metal is in spiral distribution, grain growth helically direction, it is achieved the Spiral distribution of crystal grain.
Description
Technical field
The present invention relates to casting field, a kind of can crystal grain refinement upper-drawing casting device and up casting method.
Background technology
Copper bar is the raw material for manufacturing electrician's copper conductors such as copper cash, copper bar, electric wire, has a wide range of applications, logical
Produce frequently with continuous casting and rolling method and upward-casting process.Upward-casting process utilizes siphon principle, is introduced by copper water after crystallizer not
Disconnected crystallisation by cooling, because it has, floor space is little, one-time investment is few, device structure is simple, expendable part is few, maintenance cost is low
Feature and be widely used.But, the copper bar tissue that up-drawing method produces is predominantly along the column that copper bar section radius is symmetrical
, there is the problem that tissue is thick and loose in crystalline substance, machinability is poor, and the problems such as fracture easily occur.
Summary of the invention
It is an object of the invention to propose a kind of can the upper-drawing casting device of crystal grain refinement and up casting method, it produces
Copper bar grain structure fine uniform, in spiral distribution, copper bar has good comprehensive mechanical property, subsequent use performance
Good.
For reaching this purpose, the present invention by the following technical solutions:
A kind of can crystal grain refinement upper-drawing casting device, including for hold the foundry furnace of molten metal, up casting machine with
And it is arranged at the cooler in described foundry furnace and feed tube, wherein, described up casting machine is arranged at the upper of described cooler
Side, described feed tube penetrates described cooler from the bottom of described cooler and fixes, described feed tube bottom end seal, sidewall week
Upwards offering at least one circle inlet opening, often circle inlet opening is provided with several inlet openings, each described inlet opening axially with
The inwall of described feed tube is the most tangent.
Wherein, the described axis often enclosing inlet opening and the dead in line of described feed tube.
Wherein, adjacent described often circle inlet opening mutually staggers.
Wherein, each described inlet opening along feed liquor direction obliquely, with described feed tube radially in 5 °-30 °.
Wherein, described up casting machine is provided with a pair traction wheel, and described traction wheel passes through driven by servomotor.
Wherein, insulation asbestos and graphite protective sleeve it are enclosed with outside described cooler successively.
Wherein, described foundry furnace is power frequency induction furnace or intermediate frequency furnace.
Wherein, also include drawing bar, described in draw bar be solid hopkinson bar, described in draw the internal diameter of feed tube described in the external diameter of bar, described
The one end drawing bar is connected with described feed tube, and the other end is assemblied in described up casting machine.
A kind of up casting method utilizing upper-drawing casting device, it comprises the steps:
Insulation it is contained in described foundry furnace after metal molten is become molten metal；
Described feed tube, after the bottom of described cooler penetrates described cooler and fixes, is dipped vertically into molten metal
In, can not submerge molten metal in the upper end of described cooler, and molten metal enters described feed tube by described inlet opening；
Being connected also and molten metal contacts with described feed tube described one end drawing bar, the other end is assemblied on described and draws casting
Make machine；
The described bar that draws is involved by the traction wheel of the described up casting machine starting described driven by servomotor, and molten metal passes through
Described inlet opening enters described feed tube, and at solid liquid interface, continuous crystallisation by cooling forms new metallic rod, draws bar described
Pulling under gradually described metallic rod is involved, bring negative pressure to make molten metal constantly enter described feed tube when involving and proceed
Crystallisation by cooling, finally produces whole uniform small grains described metallic rod in spiral distribution.
Wherein, described metal molten is become molten metal after be contained in described foundry furnace insulation before also include, to described
Foundry furnace preheats.
Of the present invention a kind of can crystal grain refinement upper-drawing casting device and up casting method, the feed liquor of casting device
Tube side wall circumference offers at least one circle inlet opening, and often circle inlet opening is provided with several inlet openings, each inlet opening axial
The most tangent with the inwall of feed tube；Draw bar and pull the most crystallized metallic rod upwards, to the molten metal of crystallization front
Bring negative pressure, helically formula when molten metal enters feed tube by inlet opening, molten metal forms strong convection and realizes stirring, limit and
Destroy dendritic growth, beneficially crystal grain refinement；The spiral molten metal entering feed tube, makes the thermograde of crystallization front molten metal
In spiral distribution, grain growth helically direction, it is achieved the Spiral distribution of crystal grain.
Accompanying drawing explanation
Fig. 1 is that a kind of described in the embodiment of the present invention can the structural representation of upper-drawing casting device of crystal grain refinement；
Fig. 2 be in Fig. 1 part 3 feed tube along the sectional view of axis longitudinal section；
Fig. 3 is the perspective view that in Fig. 1, part 3 feed tube is perpendicular to axis cross section.
Reference:
1, foundry furnace；2, cooler；21, insulation asbestos；22, graphite protective sleeve；3, feed tube；31, inlet opening；4, draw on
Casting machine；41, traction wheel；5, bar is drawn.
Detailed description of the invention
Further illustrate technical scheme below in conjunction with the accompanying drawings and by detailed description of the invention.
As Figure 1-3, described in the present embodiment a kind of can crystal grain refinement upper-drawing casting device, including for holding metal
The foundry furnace 1 of liquid, up casting machine 4 and be arranged at the cooler 2 in described foundry furnace 1 and feed tube 3, described up casting
Machine 4 is arranged at the top of described cooler 2, and described feed tube 3 penetrates described cooler 2 and consolidates from the bottom of described cooler 2
Fixed, described feed tube 3 bottom end seal, sidewall circumference offer at least one circle inlet opening, often circle inlet opening is provided with several
Inlet opening 31, each described inlet opening 31 axially the most tangent with the inwall of described feed tube 3；Preferably, described
Offering four circle inlet openings on feed tube 3 sidewall, often circle is provided with four inlet openings 31；Multi-turn inlet opening, it is ensured that liquid inlet volume
Abundance, is not affected by crystallization front.
The described axis often enclosing inlet opening and the dead in line of described feed tube 3；Adjacent described often circle inlet opening phase
Stagger mutually；Be conducive to turbulent flow during molten metal spiral flow, increase stirring convection current and heat exchange, crystal grain thinning；Each institute
State inlet opening 31 along feed liquor direction obliquely, with described feed tube 3 radially in 5 °-30 °；Crystallization front gold when meeting up casting
Belong to the feature of liquid liquid cave epirelief, molten metal convection current can be increased, strengthen the impact at solid liquid interface, crystal grain thinning.
Described up casting machine 4 is provided with a pair traction wheel 41, and described traction wheel 41 passes through driven by servomotor；Can realize
To drawing the hauling speed of bar 5, traction pitch and the control of intermittent time, hauling speed is the fastest, traction pitch is the biggest, the wink caused
Between negative pressure the biggest, molten metal convection current is the strongest, and mixing effect is the most obvious, crystal grain refinement the most prominent.
Described cooler 2 is outer is enclosed with insulation asbestos 21 and graphite protective sleeve 22 successively；Described insulation asbestos 21 are used for hindering
In cooler, the heat between recirculated water and molten metal exchanges, and described graphite protective sleeve 22 is used for protecting described cooler 2.
Described foundry furnace 1 is power frequency induction furnace or intermediate frequency furnace；In casting process, molten metal is incubated.
Also include drawing bar 5, described in draw bar 5 for solid hopkinson bar, described in draw the external diameter of bar 5 and be slightly less than the internal diameter of described feed tube 3,
Described one end drawing bar 5 is connected with described feed tube 3, and the other end is assemblied in described up casting machine 4；Described up casting machine 4
Being involved by the described bar 5 that draws, at the solid liquid interface of feed tube 3, the continuous crystallisation by cooling of molten metal forms new metallic rod, and described
Draw bar 5 to drive and gradually involve；Forming negative pressure after involving, molten metal constantly enters described feed tube 3 from described inlet opening 31 to be carried out
Crystallization.
A kind of up casting method, utilizes the upper-drawing casting device described in the present embodiment, and it comprises the steps:
Described foundry furnace 1 is preheated；
Insulation it is positioned in described foundry furnace 1 after metal molten is become molten metal；
Described feed tube 3, after the bottom of described cooler 2 penetrates described cooler 2 and fixes, is dipped vertically into metal
In liquid, can not submerge molten metal in the upper end of described cooler 2, and molten metal enters described feed tube 3 by described inlet opening 31；
Being connected also and molten metal contacts with described feed tube 3 described one end drawing bar 5, the other end is assemblied on described and draws
Casting machine 4；
The described bar 5 that draws is involved by the traction wheel 41 of the described up casting machine 4 starting described driven by servomotor, molten metal
Enter described feed tube 3 by described inlet opening 31, and continuous crystallisation by cooling forms new metallic rod at solid liquid interface, in institute
State and gradually described metallic rod is involved under the pulling drawing bar 5, when involving, bring negative pressure to make molten metal constantly enter described feed tube 3
Proceed crystallisation by cooling, finally produce whole uniform small grains described metallic rod in spiral distribution.
As preferred embodiment, manufacturing oxygen-free copper bar with copper liquid, the internal diameter of described feed tube 3 is φ 8.1mm, in institute
Stating and offer three circle inlet openings 31 on the sidewall of feed tube 3, often circle is average arranges 4 inlet openings 31, each described inlet opening 31
A diameter of 2mm, with radially in 10 °；The described external diameter drawing bar 5 is φ 7.0mm, and material is fine copper, and one end is placed in described feed tube 3
Bottom, the other end be fixed on described up casting machine 4 wait traction；In copper liquid is contained in foundry furnace 1 and be incubated
1120℃-1150℃；Set up upper-drawing casting device, adjusted parameter: traction pitch 8mm, hauling speed 800mm/s, intermittently time
Between 0.12s, the leaving water temperature of recirculated water controls at 43 ± 2 DEG C, starts described up casting machine 4 and will draw bar 5 and involve, is drawing bar 5
Drive under gradually copper bar is involved；Now a diameter of φ 8mm of copper bar, is almost all equiax crystal, and mean grain size is only
0.5mm, is much better than the grain structure of the copper bar that conventional method produces.
As another preferred embodiment, it is 0.1wt% manufacture Kufil bar with Kufil liquid silver content, institute
The internal diameter stating feed tube 3 is φ 16.2mm, offers 4 circle inlet openings 31 on the sidewall of described feed tube 3, and often circle is average arranges 8
Individual inlet opening 31, a diameter of 2mm of each described inlet opening 31, with radially in 15 °；The described external diameter drawing bar 5 is φ 15.0mm,
Material is fine copper, and one end is placed in the bottom of described feed tube 3, and the other end is fixed on described up casting machine 4 wait traction；Will
In Kufil liquid is contained in foundry furnace 1 and be incubated at 1120 DEG C-1150 DEG C；Set up upper-drawing casting device, adjust parameter: lead
Drawing pitch 3mm, hauling speed 400mm/s, intermittent time 0.2s, the leaving water temperature of described recirculated water controls at 43 ± 2 DEG C, starts
Described up casting machine 4 will draw bar 5 and involve, and gradually be involved by copper bar under the drive drawing bar 5；The now diameter of Kufil bar
For φ 16mm, top layer equiax crystal is the most flourishing, and crystal grain is tiny, and center pillar crystalline substance is in spiral distribution, and size is less, is much better than
The grain structure of the Kufil bar that conventional method produces.
Described in the present embodiment a kind of can crystal grain refinement upper-drawing casting device and up casting method, draw bar 5 and pull
Metallic rod through solidifying upwards, brings negative pressure to the molten metal of crystallization front, when molten metal enters feed tube 3 by inlet opening 31
Helically formula, molten metal forms strong convection and realizes stirring, limits and destroy dendritic growth, it is achieved that crystal grain refines, it is not necessary to outer
Add mechanical agitation or electromagnetic agitation；The spiral molten metal entering feed tube 3, the thermograde making crystallization front molten metal is spiral shell
Rotation distribution, grain growth helically direction, it is achieved the Spiral distribution of crystal grain；By adjusting the refinement of Traction Parameters controlled combinations grain
Degree, hauling speed is the fastest, traction pitch is the biggest, and crystal grain refinement is the most prominent；By internal diameter and the inlet opening 31 of regulation feed tube 3
Size, quantity, be applicable to produce different size metallic rod.
The know-why of the present invention is described above in association with specific embodiment.These describe and are intended merely to explain the present invention's
Principle, and limiting the scope of the invention can not be construed to by any way.Based on explanation herein, the technology of this area
Personnel need not pay performing creative labour can associate other detailed description of the invention of the present invention, and these modes fall within
Within protection scope of the present invention.
Claims (10)
1. can crystal grain refinement a upper-drawing casting device, including the foundry furnace (1) for holding molten metal, up casting machine
And the cooler (2) that is arranged in described foundry furnace (1) and feed tube (3) (4), it is characterised in that: described up casting machine
(4) being arranged at the top of described cooler (2), described feed tube (3) penetrates described cooler from the bottom of described cooler (2)
And fix (2), described feed tube (3) bottom end seal, sidewall circumference offering at least one circle inlet opening, often circle inlet opening is arranged
There are several inlet openings (31), the axial inwall phase in the same direction with described feed tube (3) of each described inlet opening (31)
Cut.
The most according to claim 1 a kind of can the upper-drawing casting device of crystal grain refinement, it is characterised in that: described often enclose feed liquor
The axis in hole and the dead in line of described feed tube (3).
The most according to claim 1 a kind of can the upper-drawing casting device of crystal grain refinement, it is characterised in that: adjacent described often
Circle inlet opening mutually staggers.
The most according to claim 1 a kind of can crystal grain refinement upper-drawing casting device, it is characterised in that: each described feed liquor
Hole (31) along feed liquor direction obliquely, with described feed tube (3) radially in 5 °-30 °.
The most according to claim 1 a kind of can crystal grain refinement upper-drawing casting device, it is characterised in that: described up casting
Machine (4) is provided with a pair traction wheel (41), and described traction wheel (41) passes through driven by servomotor.
The most according to claim 1 a kind of can crystal grain refinement upper-drawing casting device, it is characterised in that: described cooler
(2) insulation asbestos (21) and graphite protective sleeve (22) it are enclosed with the most successively.
The most according to claim 1 a kind of can crystal grain refinement upper-drawing casting device, it is characterised in that: described foundry furnace
(1) it is power frequency induction furnace or intermediate frequency furnace.
The most according to claim 1 a kind of can crystal grain refinement upper-drawing casting device, it is characterised in that: also include drawing bar
(5), described in draw bar (5) be solid hopkinson bar, described in draw the external diameter internal diameter less than described feed tube (3) of bar (5), described in draw bar (5)
One end be connected with described feed tube (3), the other end is assemblied in described up casting machine (4).
9. utilizing a up casting method for upper-drawing casting device described in claim 1-8 any one, it includes as follows
Step:
Insulation in described foundry furnace (1) it is contained in after metal molten is become molten metal；
Described feed tube (3), after the bottom of described cooler (2) penetrates described cooler (2) and fixes, is dipped vertically into gold
Belonging in liquid, can not submerge molten metal in the upper end of described cooler (2), and molten metal enters described feed liquor by described inlet opening (31)
Pipe (3)；
Being connected also and molten metal contacts with described feed tube (3) described one end drawing bar (5), the other end is assemblied on described and draws
Casting machine (4)；
The described bar (5) that draws is involved by the traction wheel (41) of the described up casting machine (4) starting described driven by servomotor, metal
Liquid enters described feed tube (3) by described inlet opening (31), and continuous crystallisation by cooling forms new metal at solid liquid interface
Bar, gradually involved described metallic rod under described the pulling drawing bar (5), brought negative pressure to make molten metal constantly enter institute when involving
State feed tube (3) and proceed crystallisation by cooling, finally produce whole uniform small grains described metallic rod in spiral distribution.
A kind of up casting method the most according to claim 9, it is characterised in that: described metal molten is become molten metal
After be contained in described foundry furnace (1) insulation before also include, described foundry furnace (1) is preheated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610839792.0A CN106180618A (en) | 2016-09-22 | 2016-09-22 | A kind of can crystal grain refinement upper-drawing casting device and up casting method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610839792.0A CN106180618A (en) | 2016-09-22 | 2016-09-22 | A kind of can crystal grain refinement upper-drawing casting device and up casting method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107186188A (en) * | 2017-03-06 | 2017-09-22 | 灏明有限公司 | Cold drawn process equipment and its processing method |
| CN107538186A (en) * | 2017-09-26 | 2018-01-05 | 中天合金技术有限公司 | A kind of production technology of up-drawing method thin-walled light copper pipe |
| CN107738067A (en) * | 2017-09-13 | 2018-02-27 | 中天合金技术有限公司 | A kind of random length half-hard state copper pipe bus production technology |
| CN107983927A (en) * | 2017-12-19 | 2018-05-04 | 中铁建电气化局集团康远新材料有限公司 | A kind of cu-based amorphous alloys continuity quickly cools down, coagulation system and its method |
| CN112355260A (en) * | 2020-10-28 | 2021-02-12 | 芜湖楚江合金铜材有限公司 | Device for increasing crystallization temperature of copper alloy for musical instrument |
| CN113134596A (en) * | 2021-04-22 | 2021-07-20 | 鞍钢股份有限公司 | Preparation method of low-oxygen-content rare earth filament |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107186188A (en) * | 2017-03-06 | 2017-09-22 | 灏明有限公司 | Cold drawn process equipment and its processing method |
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| CN107738067A (en) * | 2017-09-13 | 2018-02-27 | 中天合金技术有限公司 | A kind of random length half-hard state copper pipe bus production technology |
| CN107538186A (en) * | 2017-09-26 | 2018-01-05 | 中天合金技术有限公司 | A kind of production technology of up-drawing method thin-walled light copper pipe |
| CN107983927A (en) * | 2017-12-19 | 2018-05-04 | 中铁建电气化局集团康远新材料有限公司 | A kind of cu-based amorphous alloys continuity quickly cools down, coagulation system and its method |
| CN112355260A (en) * | 2020-10-28 | 2021-02-12 | 芜湖楚江合金铜材有限公司 | Device for increasing crystallization temperature of copper alloy for musical instrument |
| CN113134596A (en) * | 2021-04-22 | 2021-07-20 | 鞍钢股份有限公司 | Preparation method of low-oxygen-content rare earth filament |
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