CN109746279A - A kind of aluminium alloy pipe casting extrusion-rolling combined shaping method - Google Patents
A kind of aluminium alloy pipe casting extrusion-rolling combined shaping method Download PDFInfo
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- CN109746279A CN109746279A CN201811616852.8A CN201811616852A CN109746279A CN 109746279 A CN109746279 A CN 109746279A CN 201811616852 A CN201811616852 A CN 201811616852A CN 109746279 A CN109746279 A CN 109746279A
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Abstract
A kind of aluminium alloy pipe casting extrusion-rolling combined shaping method, belong to non-ferrous metal seamless pipe forming technique field, characterized by the following steps: 1) vertical centrifugal casting pipe: metal die casting mold revolving speed is 150~180r/min, poring rate is 12~18kg/s, and pouring slot pitch die cap height is 20~30cm；2) two-step homogenization: demoulding when hollow as cast condition blank temperature is down to 530~550 DEG C；3) isothermal hot extrusion: pipe internal diameter and outer diameter increase simultaneously, wall thickness reduction, and control ends, and to squeeze temperature be 320~350 DEG C；4) intermediate solid solution；5) cold rolling: pipe internal diameter is constant, outer diameter reduces, wall thickness reduction, and axial cold rolling speed is 8~12mm/s, and radial cold rolling speed is 1.2~3.0mm/s；6) two-stage time effect.The invention has the advantages that the shear-deformable degree of the wall thickness regions of tubing reduces, the wall diickness limit increases, and mechanical property is preferable.
Description
Technical field
The invention belongs to non-ferrous metal seamless tubular goods forming technique fields, and in particular to a kind of aluminium alloy pipe casting extrusion-rolling is multiple
Close manufacturing process.
Background technique
(outer diameter is aerospace, petrochemical industry, nuclear power thermoelectricity, communications and transportation etc. in 100mm or more) to large-calibre seamless pipe
The key member in Grand Equipments field generallys use hot extrusion forming process at present and is manufactured, and pipe can be before hot extrusion
Two kinds of structural states of state and as cast condition are forged, are then to carry out base by processes such as jumping-up, punchings when pipe is forging state before squeezing,
Dense structure's property is higher, and extrusion process is to guarantee that based on the outer dimension of pipe fitting, process parameter control is relatively easy, but the technique
Process is tediously long, and material is serious with energy waste, and jumping-up and punching operation equipment investment are huge；When pipe is as cast condition before squeezing,
It is then that hollow as cast condition pipe is directly prepared by centrifugal casting or sand mould casting method, dense structure's property is poor, and extrusion process is not
Only to guarantee the outer dimension of pipe fitting, it is often more important that improve structural homogenity, improve mechanical property, this technique has manufacture stream
Outstanding advantages of journey is short, saves material and the energy, saves equipment investment.
Chinese invention patent application number " 201310025199.9 " discloses a kind of crowded combined shaping production heavy caliber of casting
The method of thick-walled seamless steel pipes, it includes: 1) alloy melting；2) liquid steel refining；3) casting hollow base；4) it heats；5) hot extrusion,
Squeezing temperature is 1200~1250 DEG C, and extrusion speed is 300~400mm/s, and extrusion ratio is 8~12；6) roughing；7) at heat
Reason；8) it finishes.Chinese invention patent application number " 201310025737.4 " discloses a kind of thick-walled seamless steel pipes short-flow casting
The method for squeezing progressive forming, it includes: 1) alloy melting；2) liquid steel refining；3) riser gating ring billet, mold clearing temperature be 1280~
1330℃；4) hot extrusion, initial compression temperature are 1200~1250 DEG C, and extrusion ratio is 10~12；5) it is heat-treated；6) accurate whole
Shape.The seamless steel pipe casting and extrusion forming method of above-mentioned patent disclosure is primarily adapted for use in ferrous metal and thick-wall tube, and (wall thickness is greater than
30mm) field is that as cast condition hollow blank a time is hot-pressed, and the reduction of pipe outer diameter, internal diameter are constant before and after squeezing, required sky
The outer diameter and wall thickness dimension of heart slab are usually very big, and corresponding extruding cylinder size is also larger, manufacture extremely difficult, hot extrusion behavior
It is again closely related with the quality and performance of slab, and the forging type of hollow casting blank and technological parameter are unknown in above-mentioned patent
Really.
And when heavy caliber aluminum alloy thin-wall tube (for outer diameter in 100mm or more, wall thickness is 0.5~5mm) forming front and back pipe
Internal diameter and outer diameter increases simultaneously, wall thickness reduction, length increase, size springback control is extremely difficult in forming process, especially
Thin-wall regions metal shrinks unevenness while cooling, and internal stress redistribution, size rebound is serious, and outer dimension precision is caused to drop
It is low；And if directlying adopt the above method carries out a hot extrusion or simple heat treatment forming, extrusion cylinder and as cast condition pipe
There are shearing frictions for base contact site, and thin-wall tube wall thickness regions are shear-deformable acutely, and tissue is more easily damaged, and leads to mechanical property
It reduces.Therefore, higher to the quality requirement of slab before hot extrusion, pipe outer diameter and inner diameter increases after extruding, recessed to squeezing
The shape of mould and plug, size require it is very high, the metal flow trend in die cavity exit is also extremely complex, the prior art without
Method meets the high-performance Accurate Shaping manufacture demand of such heavy caliber aluminum alloy thin-wall tube.
Summary of the invention
It is cast the purpose of the present invention is to provide a kind of aluminium alloy pipe and squeezes combined shaping method, can effectively overcome existing
Technology there are the shortcomings that.
What the object of the invention was realized in, it is characterised in that comprise the following steps that:
(1) as shown in Fig. 1~2, using vertical centrifugal casting mode cast aluminium alloy gold pipe, pouring temperature is 660~680
DEG C, metal die casting mold revolving speed is 150~180r/min, and poring rate is 12~18kg/s, and pouring slot distance die cap height is 20
~30cm obtains the aluminum-alloy tubes size of centrifugal casting are as follows: outer diameter D0=100~800mm, internal diameter d0=30~60mm, height
H0=200~500mm, wall thickness B0=40~350mm；
(2) two-step homogenization is handled: demoulding when hollow as cast condition blank temperature is down to 530~550 DEG C, demoulding time are
5min, 10~12h of heat preservation carries out first time homogenization when being heated to 470~490 DEG C, and it is further heated up to 520~540 DEG C of heat preservations
16~18h carries out second and homogenizes, air-cooled to room temperature；
(3) isothermal hot extrusion: pipe internal diameter and outer diameter increase simultaneously, wall thickness reduction, and extrusion cylinder temperature is 390~420 DEG C,
Pipe initial compression temperature is 450~480 DEG C, and it is 320~350 DEG C that control end of a period, which squeezes temperature, and extrusion speed is 20~35mm/
S, extrusion ratio are 10~15, the aluminium alloy pipe forging's block dimension after obtaining Isothermal Extrusion are as follows: outer diameter D1It is=150~1500mm, interior
Diameter d=99~990mm, height H1=600~1800mm, wall thickness B1=25~200mm, as shown in figs. 34；
(4) intermediate solution treatment: heating temperature is 520~540 DEG C, and soaking time is 4~6h, then water cooling is to room temperature；
(5) cold rolling: pipe internal diameter is constant, outer diameter reduces, wall thickness reduction, and axial cold rolling speed is 8~12mm/s, radial
Cold rolling speed is 1.2~3.0mm/s, and rolling is than being 2~3, the aluminium alloy pipe forging's block dimension after obtaining cold rolling are as follows: outer diameter D
=100~1000mm, internal diameter d=99~990mm, height H=1000~5000mm, wall thickness B=0.5~5mm, as shown in Figure 5；
(6) two-stage time effect is handled: first time timeliness in 120~150 DEG C of 6~8h of heat preservation, be then directly warming up to 170~
190 DEG C of 10~12h of heat preservation carry out second of timeliness, then are air-cooled to room temperature, obtain required aluminium alloy pipe forging.
The invention has the advantages and beneficial effects that: the aluminum-alloy tubes of vertical centrifugal casting pass through isothermal hot extrusion, centre
After solid solution, it is further added by once cold rolling system, dispersed, weakened with the stress of cold-rolled process so that squeezing, the wall diickness pole of tubing
Limit increase, wall thickness reduce, bore increase, so as to shaped outer diameter 100mm or more, wall thickness be 0.5~5mm heavy caliber,
Thin-wall aluminum alloy tubing；Homogenization, the temperature of extruding and annealing process, speed and time setting are reasonable, standardize, available outer
Shape accurate size, interior tissue and the preferable thin-wall pipes of mechanical property.
Detailed description of the invention
Fig. 1 is vertical centrifugal casting schematic diagram；
Fig. 2 is the sizing figure of the aluminum-alloy tubes of centrifugal casting；
Fig. 3 is horizontal type extruding schematic diagram；
Fig. 4 is the sizing figure of the aluminium alloy pipe forging after Isothermal Extrusion；
Fig. 5 is the sizing figure of the aluminium alloy pipe forging after cold rolling；
In figure: 1-5-die cover plate of casting ladle 2-running channel, 3-cast gate, 4-locking pin 6-upper sand cushion 6 '-descends sand
11-plug of pad 7-metal die casting mold 8-centrifugal casting pipe 9-cooling water pipe, 10-Isothermal Extrusion pipe 12-
13-extruding punch of extrusion cylinder；
D0The outer diameter of-pipe, d0The internal diameter of-pipe, H0The height of-pipe, B0The wall thickness of-pipe, D1- extruded tube
The outer diameter of material forging, d-tubing forging internal diameter, H1The height of-extruding tubing forging, B1The wall thickness of-extruding tubing forging,
D-cold rolling tubing forging outer diameter, H-cold rolling tubing forging height, B-cold rolling tubing forging wall thickness.
Specific embodiment
The present invention is described in further details in the following with reference to the drawings and specific embodiments.
Fig. 5 show the sizing figure of the aluminium alloy pipe forging after cold rolling, i.e., a kind of aluminium-alloy pipe of the invention
Material: outer diameter D=685mm, internal diameter d=680mm, height H=3000mm, wall thickness B=2.5mm；It casts the work for squeezing combined shaping
Skill step is:
(1) vertical centrifugal casting mode cast aluminium alloy gold pipe is used, Fig. 1 show vertical centrifugal casting schematic diagram, schemes
In 1 be casting ladle, 2 be running channel, and 3 be cast gate, and 4 be locking pin, and 5 be die cover plate, and 6 be upper sand cushion, and 6 ' be lower sand cushion, and 7 be metal
Die casting, 8 be centrifugal casting pipe, and 9 be cooling water pipe, and pouring temperature is 670 DEG C, and metal die casting mold revolving speed is 180r/
Min, poring rate 18kg/s, pouring slot distance die cap height is 30cm, and obtained centrifugal casting pipe is having a size of outer diameter D0=
300mm, internal diameter d0=50mm, height H0=300mm, wall thickness B0=125mm, as shown in Figure 2；
(2) two-step homogenization is handled: the demoulding when hollow as cast condition blank temperature is down to 550 DEG C, demoulding time 5min add
Heat preservation 12h carries out first time homogenization when heat is to 490 DEG C, and it is further heated up to 530 DEG C of heat preservation 16h to carry out second of homogenization,
It is air-cooled to room temperature；
(3) isothermal hot extrusion: pipe internal diameter and outer diameter increase simultaneously, wall thickness reduction, and extrusion cylinder temperature is 420 DEG C, pipe
Initial compression temperature is 450 DEG C, and it is 350 DEG C, extrusion speed 35mm/s that control end of a period, which squeezes temperature, and extrusion ratio 10 obtains
Isothermal Extrusion aluminium alloy pipe forging's block dimension are as follows: outer diameter D1=800mm, internal diameter d=680mm, height H1=900mm, wall thickness B1
=60mm, as shown in figs. 34,10 be Isothermal Extrusion pipe in figure, and 11 be plug, and 12 be extrusion cylinder, and 13 be extruding punch；
(4) intermediate solution treatment: heating temperature is 530 DEG C, soaking time 6h, then water cooling is to room temperature；
(5) cold rolling: pipe internal diameter is constant, outer diameter reduces, wall thickness reduction, and axial cold rolling speed is 8mm/s, radial cold rolling
Speed is 1.5mm/s, and rolling is than being 3, aluminium alloy pipe forging's block dimension after obtained cold rolling are as follows: outer diameter D=685mm, internal diameter d
=680mm, height H=3000mm, wall thickness B=2.5mm, as shown in Figure 5；
(6) two-stage time effect is handled: first time timeliness in 120 DEG C of heat preservation 6h, be then directly warming up to 180 DEG C of heat preservation 10h into
Second of timeliness of row, then it is air-cooled to room temperature, obtain required aluminium alloy pipe forging.
Claims (1)
1. a kind of aluminium alloy pipe casting squeezes combined shaping method, it is characterised in that realize in following processing steps:
(1) use vertical centrifugal casting mode cast aluminium alloy gold pipe: for 660~680 DEG C, metal die casting mold turns pouring temperature
Speed is 150~180r/min, and poring rate is 12~18kg/s, and pouring slot distance die cap height is 20~30cm, obtained centrifugation
Pipe is cast having a size of outer diameter D0=100~800mm, internal diameter d0=30~60mm, height H0=200~500mm, wall thickness B0=
40~350mm；
(2) two-step homogenization is handled: demoulding when hollow as cast condition blank temperature is down to 530~550 DEG C, demoulding time 5min add
10~12h of heat preservation carries out first time homogenization when heat is to 470~490 DEG C, and it is further heated up to 520~540 DEG C of 16~18h of heat preservation
Second is carried out to homogenize, it is air-cooled to room temperature；
(3) isothermal hot extrusion: pipe internal diameter and outer diameter increase simultaneously, wall thickness reduction, and extrusion cylinder temperature is 390~420 DEG C, pipe
Initial compression temperature is 450~480 DEG C, and it is 320~350 DEG C that control end of a period, which squeezes temperature, and extrusion speed is 20~35mm/s, is squeezed
Pressure ratio is 10~15, obtained Isothermal Extrusion aluminium alloy pipe forging's block dimension are as follows: outer diameter D1=150~1500mm, internal diameter d=99
~990mm, height H1=600~1800mm, wall thickness B1=25~200mm；
(4) intermediate solution treatment: heating temperature is 520~540 DEG C, and soaking time is 4~6h, then water cooling is to room temperature；
(5) cold rolling: pipe internal diameter is constant, outer diameter reduces, wall thickness reduction, and axial cold rolling speed is 8~12mm/s, radial cold rolling
Speed is 1.2~3.0mm/s, and rolling is than being 2~3, aluminium alloy pipe forging's block dimension after obtained cold rolling are as follows: outer diameter D=100
~1000mm, internal diameter d=99~990mm, height H=1000~5000mm, wall thickness B=0.5~5mm；
(6) two-stage time effect is handled: then first time timeliness is directly warming up to 170~190 DEG C in 120~150 DEG C of 6~8h of heat preservation
It keeps the temperature 10~12h and carries out second of timeliness, then be air-cooled to room temperature, obtain required aluminium alloy pipe forging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811616852.8A CN109746279A (en) | 2018-12-27 | 2018-12-27 | A kind of aluminium alloy pipe casting extrusion-rolling combined shaping method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811616852.8A CN109746279A (en) | 2018-12-27 | 2018-12-27 | A kind of aluminium alloy pipe casting extrusion-rolling combined shaping method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113305166A (en) * | 2021-04-10 | 2021-08-27 | 桂林理工大学 | Diameter-expanding hot extrusion process for bimetal alloy steel composite pipe |
| CN113857401A (en) * | 2021-09-05 | 2021-12-31 | 桂林理工大学 | Isothermal extrusion process for Al-Zn-Mg-Sc alloy hard disk box body |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB955245A (en) * | 1961-12-04 | 1964-04-15 | Babcock & Wilcox Co | Method of and apparatus for cold drawing metal tubes |
| CN101579702A (en) * | 2009-06-17 | 2009-11-18 | 北京首宏钢科技开发有限公司 | New technique for producing high alloy steel high-end pipe by adopting cross rolling elongation technology |
| CN101811149A (en) * | 2010-04-14 | 2010-08-25 | 新兴铸管股份有限公司 | Manufacturing method of high alloy seamless steel tube |
| CN103357696A (en) * | 2013-07-18 | 2013-10-23 | 中铝洛阳铜业有限公司 | Production manufacturing process of large-diameter copper-nickel alloy seamless pipe |
| TW201521898A (en) * | 2013-07-08 | 2015-06-16 | Ati Properties Inc | Method of producing cold-worked centrifugal cast composite tubular products |
| CN104889194A (en) * | 2014-03-05 | 2015-09-09 | 北京有色金属研究总院 | Large-diameter fine-grain anti-rust aluminum alloy thin-walled tube preparation method |
| CN107838220A (en) * | 2017-09-22 | 2018-03-27 | 成都爱美科科技材料有限公司 | The preparation method of noble metal seamless tube |
| CN109576616A (en) * | 2018-12-11 | 2019-04-05 | 广东省材料与加工研究所 | A kind of aluminium alloy pipe size method for controlling springback |
-
2018
- 2018-12-27 CN CN201811616852.8A patent/CN109746279A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB955245A (en) * | 1961-12-04 | 1964-04-15 | Babcock & Wilcox Co | Method of and apparatus for cold drawing metal tubes |
| CN101579702A (en) * | 2009-06-17 | 2009-11-18 | 北京首宏钢科技开发有限公司 | New technique for producing high alloy steel high-end pipe by adopting cross rolling elongation technology |
| CN101811149A (en) * | 2010-04-14 | 2010-08-25 | 新兴铸管股份有限公司 | Manufacturing method of high alloy seamless steel tube |
| TW201521898A (en) * | 2013-07-08 | 2015-06-16 | Ati Properties Inc | Method of producing cold-worked centrifugal cast composite tubular products |
| CN103357696A (en) * | 2013-07-18 | 2013-10-23 | 中铝洛阳铜业有限公司 | Production manufacturing process of large-diameter copper-nickel alloy seamless pipe |
| CN104889194A (en) * | 2014-03-05 | 2015-09-09 | 北京有色金属研究总院 | Large-diameter fine-grain anti-rust aluminum alloy thin-walled tube preparation method |
| CN107838220A (en) * | 2017-09-22 | 2018-03-27 | 成都爱美科科技材料有限公司 | The preparation method of noble metal seamless tube |
| CN109576616A (en) * | 2018-12-11 | 2019-04-05 | 广东省材料与加工研究所 | A kind of aluminium alloy pipe size method for controlling springback |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113305166A (en) * | 2021-04-10 | 2021-08-27 | 桂林理工大学 | Diameter-expanding hot extrusion process for bimetal alloy steel composite pipe |
| CN113857401A (en) * | 2021-09-05 | 2021-12-31 | 桂林理工大学 | Isothermal extrusion process for Al-Zn-Mg-Sc alloy hard disk box body |
| CN113857401B (en) * | 2021-09-05 | 2023-05-05 | 桂林理工大学 | Isothermal extrusion process for Al-Zn-Mg-Sc alloy hard disk cartridge body |
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Application publication date: 20190514 |
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