CN105671343B - A kind of preparation method of the outer in-line purification aluminium boron intermediate alloy wire rod of electrician's aluminum melt stove - Google Patents

A kind of preparation method of the outer in-line purification aluminium boron intermediate alloy wire rod of electrician's aluminum melt stove Download PDF

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Publication number
CN105671343B
CN105671343B CN201610174636.7A CN201610174636A CN105671343B CN 105671343 B CN105671343 B CN 105671343B CN 201610174636 A CN201610174636 A CN 201610174636A CN 105671343 B CN105671343 B CN 105671343B
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alloy
melt
aluminium
wire rod
boron
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CN105671343A (en
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周天国
杨明学
张雪飞
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Jiangsu Hetuo aluminum wire Co.,Ltd.
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Shenyang University
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making alloys
    • C22C1/02Making alloys by melting
    • C22C1/026Alloys based on aluminium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium

Abstract

A kind of preparation method of the outer in-line purification aluminium boron intermediate alloy wire rod of electrician's aluminum melt stove, is related to a kind of preparation method of alloy wire, methods described includes procedure below:The first step, after commercial-purity aluminium of the purity more than 99.7% heats fusing in heating furnace, point 23 batches of addition KBF4 powder into the melt of fusing, second step, when aluminium alloy temperature reaches 780 DEG C, the N2 that purity is 99.95%, which is passed through, to alloy melt carries out melt refinery by de-gassing, 3rd step, alloy melt after refining is at 720 780 DEG C, in the case where agitator is stirred continuously with 220RPM rotating speeds, prevent that AL in alloy melt and B is formed into network structure in aluminium boron, prepare a diameter of 9.5mm aluminium boron intermediate alloy wire rod, wire rod is after cooling and continuous crisping is coiled.This method liquid metal crystallize when, intensity of cooling it is big, tissue it is fine and closely woven, crystal grain distribution is uniform, stable and reliable product quality, aluminium boron intermediate alloy wire rod continuous cast extrusion technique advanced technology.

Description

A kind of preparation of the outer in-line purification aluminium boron intermediate alloy wire rod of electrician's aluminum melt stove Method
Technical field
The present invention relates to a kind of preparation method of alloy wire, more particularly to in-line purification outside a kind of electrician's aluminum melt stove With the preparation method of aluminium boron intermediate alloy wire rod.
Background technology
Aluminium boron intermediate alloy is the electrician's aluminium melt purifying material generally used in aluminium and aluminium alloy conductive material production process Material, B in aluminium boron intermediate alloy can with seriously reduced in aluminum melt aluminum and aluminum alloy mateial electric conductivity alloying elements cr, Mn, V, Ti etc. react, and form CrB2、TiB2、VB2And MnB2Compound, by standing, being deposited to furnace bottom, removed, so as to Significantly improve the electric conductivity of aluminium and aluminium alloy conductor.Villiaumite reaction method is most widely used AlB in current industrial production2Type Aluminium boron intermediate alloy preparation method.The preparation technology of generally use is:KBF is added at 700-850 DEG C into aluminum melt4, adding Continuously stirred during entering to promote the progress of reaction, its advantage is that the prices of raw materials are low, preparation technology phase To simple, the low-density product of molten condition floats on the top of melt, it is easy to removes, can effectively improve the pure of aluminum-boron alloy Degree.Its disadvantage is:(1)When the Boron contents of melt during preparing aluminum-boron alloy reach 2% and the above, formed in melt Unformed AlB2Network structure, melt are in starchiness, and mobile performance is very poor, can not pour into a mould substantially, it is difficult to which preparing boron content is The high aluminium boron intermediate alloy wire rod of 3% AL-3%B intermediate alloys, domestic mainly to pour into a mould production with swage block, in stove plus Enter.(2)Aluminium boron intermediate alloy carries out tool stirring in preparing, and can crush interfacial tension and act on forming cluster-shaped tissue, in ingot casting mistake It is uneven that size difference, performance are unavoidably formed in journey, influences clean-up effect of the aluminium boron intermediate alloy to melt;(3)Electrician's aluminium Melt stove Cu-Mn alloys, formed CrB2, TiB2, VB2 and MnB2 compound, by stand, be deposited to furnace bottom, it is necessary to periodically pick stove or Realize that aluminium liquid is all released in stove using big kettle furnace is invested, influence production efficiency or increase equipment investment.China Power construction proposes higher requirement to aluminium and aluminium alloy conductor, and the ingot bar shape Al-B intermediate alloys of domestic production at present are The needs of domestic conductive material production can not be met.
The content of the invention
It is an object of the invention to provide a kind of system of in-line purification aluminium boron intermediate alloy wire rod outside electrician's aluminum melt stove Preparation Method, this method liquid metal crystallize when, intensity of cooling it is big, tissue it is fine and closely woven, crystal grain distribution is uniform, and product quality stably may be used Lean on, aluminium boron intermediate alloy wire rod continuous cast extrusion technique advanced technology.
The purpose of the present invention is achieved through the following technical solutions:
A kind of preparation method of the outer in-line purification aluminium boron intermediate alloy wire rod of electrician's aluminum melt stove, methods described include with Lower process:
The first step, after commercial-purity aluminium of the purity more than 99.7% heats fusing in heating furnace, into the melt of fusing Divide 2-3 batches to add KBF4 powder, and continuously stirred, fully after reaction, sample and carry out both analysis, alloy In mass fraction shared by element be:B 2.7%~3.3%, Fe≤0.15%, Si≤0.12%, surplus Al, impurity content Less than 0.01%;Stop adding KBF4 powder Huo Lv Ingot progress composition adjustments;
Second step, when aluminium alloy temperature reaches 780 DEG C, it is passed through the N2 progress melts that purity is 99.95% to alloy melt and removes Gas refines, and refining time is 5-15 minutes, and the pressure of nitrogen is 0.4~0.8MPa, and flow is that 2.5~4.5L/min is removed the gred Degasification, melt are skimmed after standing 10min at 780 DEG C, sprinkle coverture;
3rd step, the alloy melt after refining is at 720-780 DEG C, in the case where agitator is stirred continuously with 220RPM rotating speeds, Prevent that AL in alloy melt and B is formed into network structure in aluminium boron, be then continuously injected into continuous casting and extrusion machine by chute, casting Crowded wheel rotating speed is 15-25RPM, and casting crowded wheel cooling water flow is 15-25L/Min, and x shoes cooling water flow is 8-16L/Min, Under the conditions of extruding outlet temperature is 450-550 DEG C, a diameter of 9.5mm aluminium boron intermediate alloy wire rod is prepared, wire rod is through cooling Afterwards and continuous crisping is coiled.
A kind of preparation method of the outer in-line purification aluminium boron intermediate alloy wire rod of described electrician's aluminum melt stove, the described 3rd Step extruding outlet temperature is 450~550 DEG C.
Advantages of the present invention is with effect:
1st, continuous casting and extrusion shaping solves high boron content aluminum-boron alloy poor fluidity to blank shape no requirement (NR), it is impossible to even The problem of continuous cast, realize the continuously shaped of AlB intermediate alloy wire rods;
2nd, will cast, extrusion molding is completed as a procedure by an equipment, intensity of cooling when liquid metal crystallizes Larger, tissue is fine and closely woven, and the intensive shear refining effect of single roller shaping, refines AlB2 phases in addition, puies forward the quality and stably of product Reliably;
3rd, online boronation outside aluminium and the stove of aluminium alloy conductive material continuous casting and rolling shaping can be achieved, improve aluminum melt evolution Effect, the performance of aluminium conductive material can be effectively improved.
Brief description of the drawings
Fig. 1 is the process flow diagram of the present invention.
Embodiment
With reference to embodiment, the present invention is described in detail.
Fig. 1 is the process flow diagram of the present invention, and 1 is smelting furnace in figure;2 be insulated bag;3 agitators;4 be chute; 5 be casting crowded wheel;6 squeeze boots for casting;7 be material blocking block;8 be extrusion die;9 be extrusion die;10 be bosh;11 be finished product;12 For coiling machine;13 be rotating shaft;14 be hydraulic cylinder.
In conjunction with brief description of the drawings an example of the present invention.
The process of the present invention is mainly by realizations such as smelting furnace, holding furnace, continuous casting and extrusion machine and coiling machines.Casting The file block 7 and extrusion die 8 for the machine of squeezing are located on the outer round surface for the close casting crowded wheel 5 in lower section that boots 6 are squeezed in casting and are machined with and can accommodate The ring-shaped groove of alloy liquid.In the presence of hydraulic cylinder 14, cast squeeze boots 6 can around the shaft 13 rotation, and lean against casting crowded wheel 5 on. Casting crowded wheel 5 and casting have groove envelope watt 8 between squeezing boots 6.The aluminium boron intermediate alloy liquid that smelting stove 1 melts, after stirring. 740-between 870 DEG C, aluminum-boron alloy desmachyme in aluminum melt is crushed by insulated bag 2 and installed in agitator on holding furnace 3 By in the hole slot that chute 4 is continuously injected into the ring-shaped groove of casting crowded wheel 5 and groove envelope watt 8 is formed, casting crowded wheel 5 is in the direction of the clock While rotation, alloy material is brought into the deformed area at extrusion die 9.Stretch into casting the ring-shaped groove of crowded wheel 5 in, installed in casting The material extrusion block 7 squeezed on boots 6 continuously extrudes aluminium alloy from the mouth of extrusion die 9.The rotating speed of control casting crowded wheel and inflow casting are squeezed The flow for the cooling water that wheel, casting are squeezed in boots, makes the extruding outlet temperature of wire rod be maintained at 480-between 540 DEG C.If the crowded temperature of casting Height is spent, the wire rod of extrusion is easily cracked;The crowded temperature of casting is too low, and extrusion of wire intensity is big, is unfavorable for subsequent boronation and exists Line feeds silk.
The outer in-line purification preparation method of aluminium boron intermediate alloy wire rod of electrician's aluminum melt stove, comprises the following steps:
The first step, it is 780~850 DEG C in temperature after commercial-purity aluminium of the purity more than 99.7% heats fusing in heating furnace When, divide 2-3 batches to add KBF4 powder into the melt of fusing, and continuously stirred, fully after reaction, sampling Both analysis is carried out, the mass fraction in alloy shared by an element is:B 2.7%~3.3%, Fe≤0.15%, Si≤ 0.12%, surplus Al, impurity content are less than 0.01%;Stop adding KBF4 powder Huo Lv Ingot progress composition adjustments;
Second step, when aluminium alloy temperature reaches 780 DEG C, it is passed through the N2 progress melts that purity is 99.95% to alloy melt and removes Gas refines, and refining time is 8 minutes, and the pressure of nitrogen is 0.6MPa, and flow is that 3.5L/min carries out slagging-off degasification, and melt exists Skimmed after 780 DEG C of standing 10min, sprinkle coverture;
3rd step, the alloy melt after refining, in the case where agitator is stirred continuously with 220RPM rotating speeds, prevent at 750 DEG C AL in alloy melt and B is formed into network structure in aluminium boron, is then continuously injected into continuous casting and extrusion machine by chute, in casting crowded wheel Rotating speed is 18RPM, and casting crowded wheel cooling water flow is 20L/Min, and shoe cooling water flow is 12L/Min, extrudes outlet temperature Under the conditions of 489 DEG C, a diameter of 9.5mm aluminium boron intermediate alloy wire rod is prepared, wire rod is after cooling and continuous crisping is coiled.

Claims (1)

1. the preparation method of the outer in-line purification aluminium boron intermediate alloy wire rod of a kind of electrician's aluminum melt stove, it is characterised in that described Method includes procedure below:
The first step, after commercial-purity aluminium of the purity more than 99.7% heats fusing in heating furnace, divide 2- into the melt of fusing 3 crowdes of addition KBF4Powder, and continuously stirred, fully after reaction, sample and carry out both analysis, it is each in alloy Mass fraction shared by element is:B 2.7%~3.3%, Fe≤0.15%, Si≤0.12%, surplus Al, impurity content are less than 0.01%;Stop adding KBF4Powder Huo Lv Ingot carry out composition adjustment;
Second step, when aluminium alloy temperature reaches 780 DEG C, the N that purity is 99.95% is passed through to alloy melt2Carry out melt degasification essence Refining, refining time are 5-15 minutes, and the pressure of nitrogen is 0.4~0.8MPa, and flow carries out slagging-off for 2.5~4.5L/min and removed Gas, melt are skimmed after standing 10min at 780 DEG C, sprinkle coverture;
3rd step, the alloy melt after refining, in the case where agitator is stirred continuously with 220rpm rotating speeds, prevent at 720-780 DEG C Al in alloy melt and B is formed into network structure in aluminium boron, is then continuously injected into continuous casting and extrusion machine by chute, in casting crowded wheel Rotating speed is 15-25rpm, and casting crowded wheel cooling water flow is 15-25L/min, and x shoes cooling water flow is 8-16L/min, is squeezed Under the conditions of pressure outlet temperature is 450-550 DEG C, a diameter of 9.5mm aluminium boron intermediate alloy wire rod is prepared, wire rod is after cooling And continuous crisping is coiled.
CN201610174636.7A 2016-03-25 2016-03-25 A kind of preparation method of the outer in-line purification aluminium boron intermediate alloy wire rod of electrician's aluminum melt stove Active CN105671343B (en)

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CN108160961B (en) * 2017-11-23 2020-07-31 昆明理工大学 Gas-assisted continuous casting and extruding method
CN107916342B (en) * 2017-11-29 2020-10-23 河北晶宝新金属有限公司 Production process of aluminum-boron alloy rod
CN110093534A (en) * 2019-05-17 2019-08-06 江苏亨通电力特种导线有限公司 High conductivity heat-resisting aluminium alloy, preparation method and aerial condutor alloy aluminum lever
CN111519054B (en) * 2020-04-20 2021-05-18 河南中孚技术中心有限公司 Aluminum intermediate alloy material for high-efficiency purification of high-purity aluminum and production method thereof

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