CN106636697B - Al-sr alloy production technology - Google Patents

Al-sr alloy production technology Download PDF

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Publication number
CN106636697B
CN106636697B CN201611130928.7A CN201611130928A CN106636697B CN 106636697 B CN106636697 B CN 106636697B CN 201611130928 A CN201611130928 A CN 201611130928A CN 106636697 B CN106636697 B CN 106636697B
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bar
cavity
clout
production technology
molding die
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CN106636697A (en
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朱春华
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Chongqing Qinglong new Mstar Technology Ltd
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Chongqing Gu Ding Alloy Material Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making non-ferrous alloys
    • C22C1/02Making non-ferrous alloys by melting
    • C22C1/026Alloys based on aluminium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/04Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Extrusion Of Metal (AREA)

Abstract

The invention belongs to al-sr alloy production technical fields, disclose a kind of al-sr alloy production technology, including dispensing, melting, casting and extrusion forming, which is characterized in that extrusion forming is:Step 1), between straight-cylindrical molding die and bar accommodating chamber be arranged clout cavity, the shape of clout cavity is taper type, and the basal diameter of taper type is 30mm, and the taper of taper is 1/3, clout cavity and molding die are coaxial, and the bottom surface of clout cavity is close to molding die;Step 2), aluminium strontium bar that casting is formed is put into clout cavity, aluminium strontium bar is squeezed, so that aluminium strontium bar is passed through molding die and is squeezed into wire rod, when the remaining height of bar is 10 20mm, next bar is put into and continues to squeeze.The present invention solves existing production technology can not continuously extruded, technical problem that efficiency is low.

Description

Al-sr alloy production technology
Technical field
The invention belongs to al-sr alloy production technical fields, and in particular to a kind of al-sr alloy production technology.
Background technology
As its name suggests, al-sr alloy, that is, essential element is the alloy of metallic aluminium and Preparation of Metallic Strontium.The proximate matter of al-sr alloy includes Plank, bar and wire rod etc..The production technology of wherein al-sr alloy wire rod generally includes dispensing, melting, casting and extrusion forming. Suitable simple substance aluminum feedstock and simple substance strontium raw material are chosen, carries out dispensing as desired, then by the two melting and be cast into aluminium strontium Alloy bar material, finally by al-sr alloy bar extruding at al-sr alloy wire rod.
In existing production technology, extrusion forming is typically that the al-sr alloy bar of heating and softening is positioned over molding die In outer bar accommodating chamber, as shown in Figure 1, molding die(2)With bar accommodating chamber(1)It is straight-tube shape and the two is coaxial, is Al-sr alloy bar is avoided radially to be deformed, bar accommodating chamber(1)Radial dimension and al-sr alloy bar Radial dimension is identical, so that al-sr alloy is entered to molding die the extruding of al-sr alloy bar by extrusion head(2)Middle extruding Molding, in order to avoid softening bar from extrusion head and bar accommodating chamber(1)Between gap squeeze out, the radial dimension of extrusion head With bar accommodating chamber(1)Radial dimension it is also identical.
When extrusion forming operates, extrusion head is with al-sr alloy bar far from molding die(2)One end offset, to aluminium strontium close Golden bar applies pressure, and the al-sr alloy bar of softening occurs axial deformation, progresses into molding die(2)Die cavity In, and squeezed out from the other end of shaping mold cavity, form the smaller al-sr alloy wire rod of size.With the extrusion of wire rod, bar Height is gradually reduced, and when the height of bar is decreased to a certain degree, extrusion head can press remaining bar in molding die (2)End, which can not be extruded into molding die(2)Middle molding, due to bar accommodating chamber(1)Limitation, Also it can not move out, be detached with wire rod, finally be retained in extrusion head and molding die(2)Between, it is extruded together as bulk, Form the discard waste material of wire rod.If not clearing up the discard waste material, molding wire rod can not demould, and to the discard waste material It is cleared up, on the one hand can cause extrusion forming that can not be carried out continuously, the efficiency of extrusion forming is low, on the other hand, is shaped to block When the discard waste recovery of shape recycles, it is also necessary to carry out melting is reheated, it is troublesome in poeration.
Invention content
It, can not continuously extruded, effect to solve existing production technology the invention is intended to provide a kind of al-sr alloy production technology The low technical problem of rate.
Al-sr alloy production technology in this programme, including dispensing, melting, casting and extrusion forming, which is characterized in that squeeze It is molded to be:
Step 1), between straight-cylindrical molding die and bar accommodating chamber be arranged clout cavity, the shape of clout cavity Basal diameter for taper type, taper type is 30mm, and the taper of taper is 1/3, and clout cavity and molding die are coaxial, and clout The bottom surface of cavity is close to molding die;
Step 2), will casting formed aluminium strontium bar be put into clout cavity, aluminium strontium bar is squeezed, aluminium strontium is made Bar is squeezed into wire rod by molding die, when the remaining height of bar is 10-20mm, is put into next bar and continues to squeeze.
Taper type refers to that cone removes remaining part behind tip, and the bottom surface of taper type refers to the bottom surface of cone, frustum The top of shape refers to one end opposite with bottom surface in cone.
The technical principle and technique effect of this programme al-sr alloy production technology be:
Al-sr alloy bar is put into from the top of clout cavity into clout cavity by bar accommodating chamber, extrusion head from Enter in bar accommodating chamber and pressure is applied to al-sr alloy bar, the bar in clout cavity is entered into the case where squeezing force effect Extrusion forming in pattern tool.When the remaining height of bar is 10-20mm, it is put into next bar, continues to squeeze, previous bar Under the extruding of next bar, extrusion forming is gone successively into molding die, at the same time, due to being located in clout cavity Bar circumferential direction more than have cavity, bar that can be deformed to circumferential projection, particularly, previous bar is located at the end outside molding die It can be moved along the direction of inner wall towards the bar accommodating chamber of clout cavity after outwardly convex, next bar is wrapped, and And radial inside extruding can be carried out to next bar of softening, thus front and back two bars dual are squeezed radial and axial Pressure can be merged, and be realized to the continuously extruded of bar.Such fashion of extrusion, it is useless that previous bar not will produce discard Material can continuously be squeezed out with latter bar, saved cleaning discard waste material as a result, and handled the time of discard waste material.
And in the prior art, technical staff in order to avoid bar to circumferential deformation and it is inconvenient squeeze out, or avoid bar It is extruded from feed end, can all keep in mind will be positioned at the cavity for accommodating, conveying al-sr alloy bar of molding die feed end It is dimensioned to the straight-tube shape consistent with al-sr alloy bar, and the cavity for accommodating bar is designed to that simple straight-tube shape is skill Art personnel are according to the most conventional selection of existing thinking, however, such design the generation that the deficiency brought is exactly discard waste material, Even if with reference to the technological means in this programme, when the remaining height of bar is 10-20mm, it is just put into next bar, front and back two Root bar is that will not be merged under axial pressure, when previous bar is extruded into last, is located inside material Can enter in molding die, but since the amount of material is less, inconvenience is shaped to complete wire rod, and material outside due to Latter bar is not merged, and latter bar can not be drained to it intermolecular force of inside, It will not be flowed inwardly, since bar accommodates the limitation of cavity wall, will not be flowed outward, therefore, be only possible to stop At next between bar and molding die, discard waste material is formed, influences the demoulding of previous wire rod and squeezing for latter wire rod Go out, therefore, as soon as after often having squeezed out a bar, must clear up discard waste material, leads to low production efficiency, troublesome in poeration.
It is the preferred embodiment based on above-mentioned base case below:
Preferred embodiment one:The step 1)In, the basal diameter of taper type is 30mm, and the taper of taper type is 1/3, frustum The height of shape is 30mm.
Preferred embodiment two:Based on base case or preferred embodiment one, the step 2)In, wait for that the remaining height of bar is 15mm When, it is put into next bar and continues to squeeze.
Preferred embodiment three:Based on preferred embodiment two, the melting is:
Step 1), molten aluminum is heated to 771-850 DEG C;
Step 2), by specific purpose tool strontium ingot is pressed into molten aluminum, until strontium ingot melts completely, specific purpose tool includes support Bar, supporting rod lower end are equipped with pressure and cover, press and multiple through-holes are distributed on the wall of cover.It is typically directly to put into strontium ingot in the prior art Into molten aluminum, the density of strontium is 2.54*103kg/m3, the density of aluminium is 2.7*103kg/m3, strontium can be upward after putting into molten aluminum Floating, contacts with air, at high temperature, is easy to be burnt.And strontium ingot is pressed into molten aluminum bottom using pressure cover in this programme, one Aspect can be floated up to avoid strontium ingot and be contacted and scaling loss with air, and another aspect strontium spindle position is inside molten aluminum, around by high temperature Molten aluminum surround, it is easier to be melted in molten aluminum.And strontium ingot, during melting, reaction is violent, is pressed using pressure cover It is pressed on inside molten aluminum, compared to by an independent compression bar, for it presses, strontium ingot will not constantly float and lead upwards Cause needs repeatedly to press.It presses and multiple through-holes is distributed on the wall of cover, through-hole can be convenient for circulation and the heat of molten aluminum and strontium liquid Transmission, in favor of the quick melting of strontium ingot.
Preferred embodiment four:Based on preferred embodiment three, during the melting, into molten aluminum being passed through nitrogen is refined. Nitrogen refining can remove the oxygen in molten aluminum, avoid metallic aluminium and Preparation of Metallic Strontium from aoxidizing, influence alloy property, also can avoid because of molten aluminum There are scaling loss caused by oxygen for inside.
Preferred embodiment five:The air passage being connected to pressure cover is equipped with based on preferred embodiment four, in the supporting rod, nitrogen passes through The air passage is passed through into molten aluminum.Thus it can realize and nitrogen is passed through into molten aluminum, at the same time, nitrogen is passed through to pressure and is covered It is interior, the liquid in pressure cover can be stirred, is convenient for the melting of strontium ingot, also allows for the circulation of liquid and the transmission of heat.
Preferred embodiment six:Based on preferred embodiment three or four or five, during the melting, strontium ingot is pressed into molten aluminum Meanwhile stirring molten aluminum using specific purpose tool.In order to the mixing of metallic aluminium and Preparation of Metallic Strontium, reduce the process additionally stirred, by The use of specific purpose tool dexterously can realize multiple functions simultaneously in this present invention:1, strontium ingot is pressed into inside molten aluminum, is avoided The scaling loss of strontium ingot;2, nitrogen is passed through in molten aluminum, molten aluminum is refined, at the same time, circulation and the heat of liquid can be reinforced Transmission, accelerate strontium ingot melting;3, liquid is stirred, the mixing of two kinds of metals is convenient for.
Description of the drawings
Fig. 1 is the structural schematic diagram of extrusion molding dies in the prior art;
Fig. 2 is the structural schematic diagram of extrusion molding dies in the embodiment of the present invention.
Specific implementation mode
Below by specific implementation mode, the present invention is described in further detail:
Al-sr alloy production technology, including dispensing, four procedure of melting, casting and extrusion forming.Wherein:
Dispensing:Aluminium ingot and strontium ingot are chosen, according to 1:10 ratio weighs 100kg strontiums ingot and 1000kg aluminium ingots, carries out dispensing.
Melting:
Step 1), aluminium ingot is put into smelting furnace, heat up, aluminium ingot made to be fused into molten aluminum;
Step 2), the temperature of molten aluminum risen to 771-850 DEG C, strontium ingot is pressed into molten aluminum using specific purpose tool, it is special Tool includes supporting rod, and supporting rod lower end is equipped with pressure and covers, and the air passage being connected to pressure cover is equipped in supporting rod, presses on the wall of cover It is furnished with multiple through-holes.Strontium ingot is pressed into during melting strontium ingot into molten aluminum, molten aluminum is stirred using specific purpose tool, it is same with this When, nitrogen is passed through into molten aluminum by the air passage in supporting rod and is refined, until strontium ingot melts completely.
Casting:By the solution slag hitting of above-mentioned melting, stands after five minutes, be cast into cylindrical aluminium strontium alloy stick to be extruded Material, 4 kilograms/root of bar, a diameter of 20mm of bar are highly 400mm;It is water-cooled.
Extrusion forming:
Step 1), as shown in Fig. 2, clout cavity 2 is arranged between straight-cylindrical molding die 3 and bar accommodating chamber 1, at The height of pattern tool 3 is 10mm, a diameter of 9.8mm;The shape of clout cavity 2 is taper type, and the basal diameter of taper type is The taper of 30mm, top end diameter 20mm, taper are 1/3, and the bottom surface of clout cavity 2 is close to molding die 3;Molding die 3 Discharge end is equipped with discharging mode 4, and discharging mode 4 is taper type, and the basal diameter of discharging mode 4 is 20mm, top end diameter 9.8mm, The height of discharging mode 4 is 35mm.Bar accommodating chamber 1, clout cavity 2, molding die 3, discharging mode 4 four are coaxial, clout cavity 2, molding die 3, discharging mode 4 are integrally formed.
Step 2), al-sr alloy bar is warming up to 480-550 DEG C, and it is put by bar accommodating chamber 1 to clout It in cavity 2, is offseted with the end of extrusion head and al-sr alloy bar, al-sr alloy bar is squeezed with 600 tons of extruders, So that aluminium strontium bar is passed through molding die 3 and be squeezed into wire rod, when the remaining height of bar is 15mm, is put into next bar and continues to squeeze Pressure, and so on, realize the continuously extruding and molding of al-sr alloy wire rod.
It is observed by many experiments, using the production technology in embodiment come when producing al-sr alloy wire rod, strontium ingot will not Scaling loss, and during extruding, not will produce discard waste material, just discard waste material is carried out without often having squeezed a bar Processing.

Claims (7)

1. al-sr alloy production technology, including dispensing, melting, casting and extrusion forming, which is characterized in that extrusion forming is:
Clout cavity is arranged in step 1) between straight-cylindrical molding die and bar accommodating chamber, and the shape of clout cavity is cone The basal diameter of platform shape, taper type is 30mm, and the taper of taper type is 0.2-0.4, and clout cavity and molding die are coaxial and remaining Expect the bottom surface of cavity close to molding die;
The aluminium strontium bar that casting is formed is put into clout cavity by step 2), is squeezed aluminium strontium bar, is made aluminium strontium bar It is squeezed into wire rod by molding die, when the remaining height of bar is 10-20mm, next bar is put into and continues to squeeze.
2. al-sr alloy production technology according to claim 1, which is characterized in that in the step 1), the bottom of taper type The taper of a diameter of 30mm in face, taper type are 1/3, and the height of taper type is 30mm.
3. al-sr alloy production technology according to claim 1 or 2, which is characterized in that in the step 2), wait for more than bar When lower height is 15mm, it is put into next bar and continues to squeeze.
4. al-sr alloy production technology according to claim 3, which is characterized in that the melting is:
Molten aluminum is heated to 771-850 DEG C by step 1);
Strontium ingot is pressed into molten aluminum by step 2) by specific purpose tool, until strontium ingot melts completely, specific purpose tool includes supporting rod, Supporting rod lower end is equipped with pressure and covers, and presses and multiple through-holes are distributed on the wall of cover.
5. al-sr alloy production technology according to claim 4, it is characterised in that:During the melting, to molten aluminum Nitrogen is inside passed through to be refined.
6. al-sr alloy production technology according to claim 5, it is characterised in that:It is equipped in the supporting rod and connects with pressure cover Logical air passage, nitrogen are passed through by the air passage into molten aluminum.
7. the al-sr alloy production technology according to claim 4 or 5 or described in 6, it is characterised in that:During the melting, While strontium ingot is pressed into molten aluminum, molten aluminum is stirred using specific purpose tool.
CN201611130928.7A 2016-12-09 2016-12-09 Al-sr alloy production technology Active CN106636697B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115141945B (en) * 2022-08-01 2023-10-31 立中四通轻合金集团股份有限公司 Preparation method of aluminum-strontium intermediate alloy coiled material with strontium content being more than 10wt%

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991004809A1 (en) * 1989-09-28 1991-04-18 Institut Fiziki Vysokikh Davleny Imeni L.F.Veresc Hagina Akademii Nauk Sssr Method for making elongate articles of small cross-sectional area by hot gas extrusion
GB2366226A (en) * 2000-08-30 2002-03-06 Luxfer Group Ltd Die tooling
CN202490841U (en) * 2012-03-16 2012-10-17 上海宇擎稀贵金属材料有限公司 Magnesium-zinc-zirconium alloy formation device
CN203076354U (en) * 2013-03-07 2013-07-24 云南新铜人实业有限公司 Application structure for extruding large-section material
CN105728493A (en) * 2016-03-11 2016-07-06 湖南大学 Composite large plastic deformation device for combined type twisting and extruding pier and forming method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991004809A1 (en) * 1989-09-28 1991-04-18 Institut Fiziki Vysokikh Davleny Imeni L.F.Veresc Hagina Akademii Nauk Sssr Method for making elongate articles of small cross-sectional area by hot gas extrusion
GB2366226A (en) * 2000-08-30 2002-03-06 Luxfer Group Ltd Die tooling
CN202490841U (en) * 2012-03-16 2012-10-17 上海宇擎稀贵金属材料有限公司 Magnesium-zinc-zirconium alloy formation device
CN203076354U (en) * 2013-03-07 2013-07-24 云南新铜人实业有限公司 Application structure for extruding large-section material
CN105728493A (en) * 2016-03-11 2016-07-06 湖南大学 Composite large plastic deformation device for combined type twisting and extruding pier and forming method

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Effective date of registration: 20190507

Address after: 402660 Block D27-1/02, North District of Tongnan Industrial Park, Chongqing

Patentee after: Chongqing Qinglong new Mstar Technology Ltd

Address before: 402367 Unity Road, Yongxi Town, Dazu County, Chongqing

Patentee before: Chongqing Gu Ding alloy material Co., Ltd