CN104741559A - Equipment and technical method suitable for 5356 aluminium alloy continuous casting fine forming - Google Patents
Equipment and technical method suitable for 5356 aluminium alloy continuous casting fine forming Download PDFInfo
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- CN104741559A CN104741559A CN201310741229.6A CN201310741229A CN104741559A CN 104741559 A CN104741559 A CN 104741559A CN 201310741229 A CN201310741229 A CN 201310741229A CN 104741559 A CN104741559 A CN 104741559A
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Abstract
The invention relates to equipment and a technological method suitable for 5356 aluminium alloy continuous casting fine forming, and belongs to the field of metal material machining. The equipment comprises a vent pipe, a graphite crucible cover, a graphite crucible, heating coils, a refractory clay end socket, a zirconia joint, a graphite tube, a dummy ingot device, a water cooling cover, a graphite insert and a temperature measuring device. The heating coils are arranged outside the graphite crucible, and the temperature measuring device is mounted in the graphite crucible and is used for measuring the temperature in the crucible and controlling the temperature in the crucible through a replay. The graphite crucible cover is mounted on the top of the graphite crucible, and the graphite insert is arranged between the graphite crucible cover and the graphite crucible. The vent pipe is arranged on the graphite crucible cover. A hole is formed in the side face of the bottom of the graphite crucible and is externally connected with the zirconia joint, and the refractory clay end socket is arranged between the zirconia joint and the graphite crucible. The zirconia joint is connected with the graphite tube, and the water cooling cover is arranged outside the graphite tube. One end of the dummy ingot device is arranged in the graphite tube, and 5356 aluminium alloy continuous casting billets with the diameters being no larger than 10 mm can be horizontally and continuously casted. The equipment and the technological method have the advantages of simplifying the technology, saving energy and being high in efficiency.
Description
Technical field
The present invention relates to a kind of equipment and technology adopting graphite mold pressurising continuous casting fine forming, particularly a kind of equipment and technology method being applicable to 5356 aluminium alloy continuous casting fine formings, belongs to metal material processing field.
Background technology
5356 aluminium welding wires are a kind of broad-spectrum universal wldings, and intensity is high, has good corrosion stability.Be mainly used in the industries such as motor car, pressure vessels for the chemical industry, war industry's production, boats and ships, aviation, 5356 welding wires are widely applied in the welding of Al-Mg system, Al-Mg-Si system and Al-Zn-Mg line aluminium alloy structural material.
The chemical composition of 5356 aluminium welding wire welding wires is: Mg:4.5 ~ 5.5%, Mn:0.2 ~ 0.5%, Ti:0.05 ~ 0.2%, Zr:0.08 ~ 0.15%, Cr:0.05 ~ 0.2%, Si:<0.25%, Fe:<0.4%, Cu:<0.1%, all the other are Al, general about the 2mm of finished industrial product light 5356 aluminum alloy welding filament diameter.
Because 5356 aluminium alloy plasticity are poor, during continuous casting, easily there is " breaking " phenomenon, be difficult to the excellent base that direct continuous casting goes out minor diameter (diameter is not more than 10mm).Current China 5356 aluminium welding wire processing technology be first cast the ingot that diameter is about 100mm, then homogenizing annealing; Be extruded into into the excellent base of diameter 10mm again through extruder, extrusion speed is comparatively slow, and is easy to occur crackle, and yield rate is lower.Data shows some external producers 5356 welding wire and adopts continuous casting and rolling method to produce, and aluminium liquid continuous casting after refining becomes the length of side to be the lozenge blank of 40 ~ 50mm, becomes the line base of diameter about 10mm through 13 road hot continuous rollings.After these two kinds of techniques make the line base of about 10mm, all will make the brightness welding wire of about 2mm through drawing and annealing, operation is loaded down with trivial details in general for two kinds of techniques, and equipment needed thereby is complicated, consumes energy higher.
China produce 5356 aluminium alloy welding wires compared with import welding wire, hydrogen content and oxide inclusion content higher, had a strong impact on the quality of weld seam.Often there is the phenomenon broken in welding wire, mainly because oxide inclusion content is high, coarse grains, exists dendritic segregation problem in drawing process, causes the plasticity of aluminium alloy to decline, therefore cannot meet the needs of high-speed automated welding.Special industry (particularly bullet train, space flight, military affairs etc.) has to rely on import, affects the development of China's space flight and Defence business.Therefore, China must strengthen the research and preparation of welding wire high-quality Al alloy.
Summary of the invention
The object of the invention is to develop a kind of short route, energy-conservation, cheap, be suitable for large-scale industrial production, and a kind of fine forming equipment and technology of great surface quality 5356 aluminium alloy continuous casting billet can be obtained.
A kind of equipment being applicable to 5356 aluminium alloy continuous casting fine formings, be applicable to 5356 aluminium alloy pressurising continuous casting fine formings, comprise breather pipe, graphite crucible lid, graphite crucible, heater coil, fire clay end socket, zirconia joint, graphite-pipe, dummy device, water collar, graphite backing and temperature measuring equipment etc.; Described graphite crucible outer setting heater coil, temperature measuring equipment is arranged in graphite crucible, and described temperature measuring equipment measures temperature and passes through the temperature in Control crucible; Graphite crucible lid is installed at described graphite crucible top, and arrange graphite backing between described graphite crucible lid and graphite crucible, described graphite crucible covers and arranges breather pipe; Described graphite crucible bottom sides perforate, external zirconia joint, be fire clay end socket between described zirconia joint and graphite crucible, zirconia joint is connected with graphite-pipe, graphite-pipe outer setting water collar, one end of dummy device is placed in graphite-pipe.
Described heater coil is induction coil or resistance wire.
Be connected by screw threads for fastening between described graphite crucible with graphite crucible lid; Be threaded connection between described zirconia joint and graphite-pipe.
Described water collar arranges water inlet and delivery port, for inflow and the outflow of cooling water.
Internal diameter≤the 10mm of described graphite-pipe.
A kind of process being applicable to 5356 aluminium alloy continuous casting fine formings, horizontal continuous casting process is adopted to produce 5356 aluminium alloy strands, aluminium alloy is comprised the steps: to load in graphite crucible, graphite crucible lid is tightened, adopt heater coil aluminium alloy to be heated to fusing, adopt temperature measuring equipment to measure the temperature of aluminum alloy melt also by the temperature in Control crucible; Be filled with nitrogen by breather pipe, in water collar, logical cooling water, pulls out dummy device, obtains 5356 aluminium alloy continuous casting billets.
The temperature of described aluminum alloy melt controls at 700 ~ 800 DEG C, and nitrogen pressure is 0.03 ~ 0.08MPa, and the cooling water water yield is 4 ~ 10L/min; The continuous casting process of dummy device is: just drawing journey is 8 ~ 15mm, moves back that to draw journey be 1 ~ 3mm, is just drawing speed 80 ~ 130mm/s, is moving back and draw speed 40 ~ 80mm/s, just drawing and stopping 0.1 ~ 0.2s, moving back to draw and stop 0.01 ~ 0.05s, just accelerate 70000 ~ 90000mm/s
2, move back acceleration 40000 ~ 70000mm/s
2, continuous casting billet diameter is 6 ~ 10mm.
The present invention adopts horizontal continuous casting process to produce 5356 aluminium alloy strands, aluminium alloy is contained in graphite crucible, graphite crucible skin adopts induction coil heating or Resistant heating, and for the aluminium alloy in graphite crucible is heated to liquid state, temperature measurer measures and passes through the temperature in Control crucible; Graphite crucible top has installed graphite crucible lid additional, and be fastenedly connected with screw thread and graphite crucible, graphite crucible has covered breather pipe, can pass into nitrogen, is used for, to the aluminum alloy melt pressurization of fusing, graphite backing being housed between graphite crucible lid and graphite crucible and preventing from leaking gas.Graphite crucible bottom opening, external zirconia joint, uses fire clay shutoff between zirconia joint and graphite crucible, prevent aluminum alloy melt from flowing out; Zirconia joint and graphite-pipe screw thread are connected, and the water collar outside both and graphite-pipe forms graphite mold, and this graphite mold is the outflow of 5356 aluminum alloy melts and solidifies passage, and in water collar, logical cooling water, is cooled to solid-state by the aluminum alloy melt of fusing; Crystallizer is put in one end of dummy device, together with being cooled to solid-state aluminum alloy melt and being set in, go out with dummy device continuous casting again, with the aluminum alloy melt pressurization of nitrogen to fusing during continuous casting, get final product the 5356 aluminium alloy continuous casting billets that horizontal casting goes out minor diameter (diameter is not more than 10mm).
Compared with prior art, tool of the present invention has the following advantages:
(1) processing technology simplifies, efficiency is high, current traditional handicraft first casts the excellent base that large scale ingot (diameter is about 100mm) is squeezed into about 10mm again, or first continuous casting thick diameter rod base (diameter is about 40mm) again multi-pass hot continuous rolling become the excellent base of about 10mm, equipment is complicated, operation is loaded down with trivial details, inefficiency, consumes energy higher.Utilize this equipment and process directly can go out the excellent base of minor diameter (diameter is not more than 10mm) by continuous casting, and then direct drawing simplify technique, has saved the energy, has improve efficiency.
(2) nitrogen is adopted to apply pressure to the aluminium alloy liquid in crucible, the continuous casting billet in zirconia joint and graphite-pipe is made mainly to bear the axial compression stress coming from crucible direction, not only eliminate the defects such as the crackle easily occurred in general continuous casting billet like this, priorly be that of avoiding because 5356 aluminium alloy plasticity are poor, incident during continuous casting " breaking " problem, directly can go out 5356 aluminium alloy continuous casting billets of the minor diameter of great surface quality by continuous casting.
(3) in the aluminium liquid exit of graphite crucible, zirconia joint and graphite-pipe screw thread are connected, and because zirconia heat transfer coefficient is low, can ensure that the temperature in graphite crucible aluminium liquid exit does not reduce, ensure that the normal temperature gradients of continuous casting; And force cooling in the water flowing of graphite-pipe external application water collar, can utilize the high thermal conductivity coefficient of graphite, the aluminium liquid that continuous casting is gone out solidifies as early as possible and lowers the temperature, and to improve the intensity of continuous casting billet, avoids " breaking " phenomenon occurs.
(4) aluminum alloy melt heats and is incubated in crucible, simultaneously, pass into nitrogen pressurization, make aluminum alloy melt and air completely isolated, therefore aluminum alloy melt oxide-free, without being mingled with, not producing hydrogen content increases problem, there is no the problems such as the pore easily occurred in traditional diamond-making technique, increased substantially the yield rate of continuous casting billet yet.
Accompanying drawing explanation
Fig. 1 is equipment structure chart of the present invention.
Main Reference Numerals illustrates:
1 breather pipe 2 graphite crucible lid
3 graphite crucible 4 heater coils
5 fire clay end socket 6 zirconia joints
7 graphite-pipe 8 water inlets
9 dummy device 10 delivery ports
11 water collar 12 aluminum alloy melts
13 graphite backing 14 temperature measuring equipments
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described.
As shown in Figure 1, the present invention is applicable to the equipment of 5356 aluminium alloy continuous casting fine formings, comprises breather pipe 1, graphite crucible lid 2, graphite crucible 3, heater coil 4, fire clay end socket 5, zirconia joint 6, graphite-pipe 7, dummy device 9, water collar 11, graphite backing 13 and temperature measuring equipment 14 etc.; Graphite crucible 3 outer setting heater coil 4, temperature measuring equipment 14 is arranged in graphite crucible 3, and temperature measuring equipment 14 measures and by the temperature in Control crucible; Graphite crucible lid 2 is installed at graphite crucible 3 top, arranges graphite backing 13, graphite crucible lid 2 is arranged breather pipe 1 between graphite crucible lid 2 and graphite crucible 3; The perforate of graphite crucible 3 bottom sides, external zirconia joint 6, it is fire clay end socket 5 between zirconia joint 6 and graphite crucible 2, zirconia joint 6 is connected with graphite-pipe 7, graphite-pipe 7 outer setting water collar 11, zirconia joint 6 and graphite-pipe 7 form graphite mold with the water collar 11 outside graphite-pipe 7, and one end of dummy device 9 is placed in graphite-pipe 7.
Heater coil 4 is induction coil or resistance wire.Be connected by screw threads for fastening between graphite crucible 3 with graphite crucible lid 2; Described zirconia joint 6 is connected by screw thread with between graphite-pipe 7.Water collar 11 is arranged water inlet 8 and delivery port 10, for inflow and the outflow of cooling water.Internal diameter≤the 10mm of graphite-pipe 7.
Adopt the process of carrying out 5356 aluminium alloy continuous casting fine formings of the said equipment, comprise the steps: aluminium alloy to be loaded in graphite crucible 3, graphite crucible lid 2 is tightened, adopt heater coil 4 aluminium alloy is heated to fusing, adopt temperature measuring equipment 14 measure aluminum alloy melt 12 temperature and by the temperature in Control crucible; Be filled with nitrogen by breather pipe 1, in water collar 11, logical cooling water, pulls out dummy device 9, can go out 5356 aluminium alloy continuous casting billets of minor diameter (diameter is not more than 10mm) by horizontal casting.
Aluminum alloy melt is contained in graphite crucible 3, and graphite crucible 3 skin adopts induction coil heating or Resistant heating, and for the aluminium alloy in graphite crucible 3 is heated to liquid state, temperature measurer measures and passes through the temperature in Control crucible; Graphite crucible 3 top has installed graphite crucible lid 2 additional, be fastenedly connected with screw thread and graphite crucible 3, graphite crucible lid 2 has breather pipe 1, nitrogen is pressurizeed by the aluminum alloy melt 12 of breather pipe 1 to fusing, graphite backing 13 is housed between graphite crucible lid 2 and graphite crucible 3 and prevents from leaking gas; Graphite crucible 3 bottom opening, external zirconia joint 6, uses fire clay shutoff between zirconia joint 6 and graphite crucible 3, prevent aluminum alloy melt 12 from flowing out; Zirconia joint 6 and graphite-pipe 7 are connected with screw thread, both form graphite mold with the water collar 11 outside graphite-pipe 7, this graphite mold is the outflow of 5356 aluminum alloy melts and solidifies passage, and in water collar 11, logical cooling water, is cooled to solid-state by the aluminum alloy melt 12 of fusing; Crystallizer is put in one end of dummy device 9, together with being cooled to solid-state aluminum alloy melt 12 and being set in, then pulls out with dummy device 9, gets final product the 5356 aluminium alloy continuous casting billets that horizontal casting goes out minor diameter (diameter is not more than 10mm).
5356 aluminium alloy bars blank pressurising continuous castings of embodiment 1:10mm diameter are shaped
5356 aluminium alloy stock are put into graphite crucible 3, graphite crucible lid 2 is tightened, with heater coil 4, aluminium alloy is heated to fusing, temperature controls at 700 ~ 740 DEG C by temperature measuring equipment 14, is filled with nitrogen by breather pipe 1, nitrogen pressure 0.03MPa, the cooling water water yield of water collar 11 is 8 ~ 10L/min, the continuous casting process of dummy device 9 is: just draw journey 9.5mm, move back and draw journey 2.5mm, is just drawing fast 85mm/s, move back and draw fast 65mm/s, just drawing and stopping 0.13s, moving back to draw and stop 0.01s, just accelerate 73000mm/s
2, move back and accelerate 50000mm/s
2.On this basis, the diameter that can obtain great surface quality is the 5356 aluminum alloy continuous casting rod bases of 10mm, and excellent base inside combines fine and close, flawless, segregation, the defect such as loose.
5356 aluminium alloy bars blank pressurising continuous castings of embodiment 2:8mm diameter are shaped
5356 aluminium alloy stock are put into graphite crucible 3, graphite crucible lid 2 is tightened, with heater coil 4, aluminium alloy is heated to fusing, temperature controls at 730 ~ 770 DEG C by temperature measuring equipment 14, is filled with nitrogen by breather pipe 1, nitrogen pressure 0.05MPa, the cooling water water yield of water collar 11 is 6 ~ 8L/min, the continuous casting process of dummy device 9 is: just draw journey 11.5mm, move back and draw journey 2.0mm, is just drawing fast 95mm/s, move back and draw fast 55mm/s, just drawing and stopping 0.15s, moving back to draw and stop 0.02s, just accelerate 75000mm/s
2, move back and accelerate 55000mm/s
2.On this basis, the diameter that can obtain great surface quality is the 5356 aluminum alloy continuous casting rod bases of 8mm, and excellent base inside combines fine and close, flawless, segregation, the defect such as loose.
5356 aluminium alloy bars blank pressurising continuous castings of embodiment 3:6mm diameter are shaped
5356 aluminium alloy stock are put into graphite crucible 3, graphite crucible lid 2 is tightened, with heater coil 4, aluminium alloy is heated to fusing, temperature controls at 760 ~ 800 DEG C by temperature measuring equipment 14, is filled with nitrogen by breather pipe 1, nitrogen pressure 0.07MPa, the cooling water water yield of water collar 11 is 4 ~ 6L/min, the continuous casting process of dummy device 9 is: just draw journey 13.5mm, move back and draw journey 1.5mm, is just drawing fast 115mm/s, move back and draw fast 45mm/s, just drawing and stopping 0.18s, moving back to draw and stop 0.03s, just accelerate 80000mm/s
2, move back and accelerate 60000mm/s
2.On this basis, the diameter that can obtain great surface quality is the 5356 aluminum alloy continuous casting rod bases of 6mm, and excellent base inside combines fine and close, flawless, segregation, the defect such as loose.
The present invention adopts horizontal continuous casting process to produce 5356 aluminium alloy strands, eliminates the crackle, the oscillation mark that easily occur in general continuous casting billet, improves the intensity of continuous casting billet, avoids " breaking " phenomenon occurs; The inner oxide-free of strand, without being mingled with, not producing hydrogen content increases and pore problem; Go out 5356 aluminium alloy continuous casting billets of minor diameter (diameter is not more than 10mm) without extruding or the direct horizontal casting of tandem rolling, simplify technique, saved the energy, improve efficiency.
Claims (9)
1. be applicable to an equipment for 5356 aluminium alloy continuous casting fine formings, it is characterized in that: comprise breather pipe, graphite crucible lid, graphite crucible, heater coil, fire clay end socket, zirconia joint, graphite-pipe, dummy device, water collar, graphite backing and temperature measuring equipment; Described graphite crucible outer setting heater coil, temperature measuring equipment is arranged in graphite crucible, and described temperature measuring equipment measures temperature and passes through the temperature in Control crucible; Graphite crucible lid is installed at described graphite crucible top, and arrange graphite backing between described graphite crucible lid and graphite crucible, described graphite crucible covers and arranges breather pipe; Described graphite crucible bottom sides perforate, external zirconia joint, be fire clay end socket between described zirconia joint and graphite crucible, zirconia joint is connected with graphite-pipe, graphite-pipe outer setting water collar, one end of dummy device is placed in graphite-pipe.
2. be applicable to the equipment of 5356 aluminium alloy continuous casting fine formings as claimed in claim 1, it is characterized in that: described heater coil is induction coil or resistance wire.
3. be applicable to the equipment of 5356 aluminium alloy continuous casting fine formings as claimed in claim 1, it is characterized in that: be connected by screw threads for fastening between described graphite crucible with graphite crucible lid; Be threaded connection between described zirconia joint and graphite-pipe.
4. be applicable to the equipment of 5356 aluminium alloy continuous casting fine formings as claimed in claim 1, it is characterized in that: described water collar arranges water inlet and delivery port.
5. be applicable to the equipment of 5356 aluminium alloy continuous casting fine formings as claimed in claim 1, it is characterized in that: the internal diameter≤10mm of described graphite-pipe.
6. one kind is applicable to the process of 5356 aluminium alloy continuous casting fine formings, aluminium alloy is comprised the steps: to load in graphite crucible, graphite crucible lid is tightened, adopt heater coil aluminium alloy to be heated to fusing, adopt temperature measuring equipment to measure the temperature of aluminum alloy melt also by the temperature in Control crucible; Be filled with nitrogen by breather pipe, in water collar, logical cooling water, pulls out dummy device, obtains 5356 aluminium alloy continuous casting billets.
7. be applicable to the process of 5356 aluminium alloy continuous casting fine formings as claimed in claim 6, it is characterized in that: the temperature of described aluminum alloy melt is 700 ~ 800 DEG C, and nitrogen pressure is 0.03 ~ 0.08MPa, and the cooling water water yield is 4 ~ 10L/min.
8. be applicable to the process of 5356 aluminium alloy continuous casting fine formings as claimed in claim 6, it is characterized in that: the continuous casting process of described dummy device is: just drawing journey is 8 ~ 15mm, move back that to draw journey be 1 ~ 3mm, just drawing speed 80 ~ 130mm/s, move back and draw speed 40 ~ 80mm/s, just drawing and stopping 0.1 ~ 0.2s, moving back to draw and stop 0.01 ~ 0.05s, just accelerate 70000 ~ 90000mm/s
2, move back acceleration 40000 ~ 70000mm/s
2.
9. be applicable to the process of 5356 aluminium alloy continuous casting fine formings as claimed in claim 6, it is characterized in that: the diameter of the continuous casting billet obtained is 6 ~ 10mm.
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| CN201310741229.6A CN104741559B (en) | 2013-12-27 | 2013-12-27 | Equipment and technical method suitable for 5356 aluminium alloy continuous casting fine forming |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106914609A (en) * | 2017-04-27 | 2017-07-04 | 重庆大学 | A kind of aluminium alloy melt heating heat preserving method |
| CN107931346A (en) * | 2017-12-26 | 2018-04-20 | 徐州安诚矿山设备有限公司 | A kind of new and effective extruder |
| CN111112875A (en) * | 2019-12-31 | 2020-05-08 | 上海交通大学 | Containing TiB2Granular aluminum alloy welding wire and preparation method thereof |
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| JPS6030558A (en) * | 1983-07-27 | 1985-02-16 | Kawasaki Heavy Ind Ltd | Tundish for continuous casting having electric melting furnace |
| CN1603027A (en) * | 2004-06-04 | 2005-04-06 | 东北大学 | Low-frequency electromagnetic field horizontal continuous casting process and equipment for aluminum alloy and magnesium alloy |
| CN101020228A (en) * | 2007-03-19 | 2007-08-22 | 东北大学 | Horizontal continuous light alloy casting process and apparatus with cooperation of power ultrasound wave and low frequency electromagnetic wave |
| CN101052487A (en) * | 2004-11-04 | 2007-10-10 | 韩国机械研究院 | An apparatus for horizontal continuous casting of magnesium alloys plate and manufacturing method thereof |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU403491A1 (en) * | 1970-10-28 | 1973-10-26 | INSTALLATION OF NONRUPTION METAL CASTING OF HORIZONTAL TINA | |
| JPS6030558A (en) * | 1983-07-27 | 1985-02-16 | Kawasaki Heavy Ind Ltd | Tundish for continuous casting having electric melting furnace |
| CN1603027A (en) * | 2004-06-04 | 2005-04-06 | 东北大学 | Low-frequency electromagnetic field horizontal continuous casting process and equipment for aluminum alloy and magnesium alloy |
| CN101052487A (en) * | 2004-11-04 | 2007-10-10 | 韩国机械研究院 | An apparatus for horizontal continuous casting of magnesium alloys plate and manufacturing method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106914609A (en) * | 2017-04-27 | 2017-07-04 | 重庆大学 | A kind of aluminium alloy melt heating heat preserving method |
| CN107931346A (en) * | 2017-12-26 | 2018-04-20 | 徐州安诚矿山设备有限公司 | A kind of new and effective extruder |
| CN111112875A (en) * | 2019-12-31 | 2020-05-08 | 上海交通大学 | Containing TiB2Granular aluminum alloy welding wire and preparation method thereof |
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| CN104741559B (en) | 2017-02-08 |
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