CN1473670A - Method and device for producing superfine crystal particle tube by pure cutting and extruding - Google Patents
Method and device for producing superfine crystal particle tube by pure cutting and extruding Download PDFInfo
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- CN1473670A CN1473670A CNA031334911A CN03133491A CN1473670A CN 1473670 A CN1473670 A CN 1473670A CN A031334911 A CNA031334911 A CN A031334911A CN 03133491 A CN03133491 A CN 03133491A CN 1473670 A CN1473670 A CN 1473670A
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- pipe
- recipient
- tubing
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- fine grain
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000013078 crystal Substances 0.000 title abstract description 5
- 239000002245 particle Substances 0.000 title description 2
- 239000000463 material Substances 0.000 claims abstract description 19
- 238000002360 preparation method Methods 0.000 claims abstract description 19
- 238000001125 extrusion Methods 0.000 claims description 30
- 230000003647 oxidation Effects 0.000 claims description 7
- 238000007254 oxidation reaction Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 6
- 101100328887 Caenorhabditis elegans col-34 gene Proteins 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001008 7075 aluminium alloy Inorganic materials 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001203 Alloy 20 Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000001192 hot extrusion Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002159 nanocrystal Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
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Abstract
The present invention belongs to the field of superfine crystal grain pipe preparation technology. Pure cutting and extruding deformation is realized to replace available extruding formation. Special mold unit is set in extruder and pipe blank is extruded repeatedly to make the micro structure of pipe become superfine crystal grains. Each deformation has unchanged pipe diameter and pipe wall and is pure cutting deformation. The present invention is suitable for multiple kinds of material and has short process, high efficiency and low cost.
Description
Technical field the invention belongs to ultra-fine grain preparation of pipes technical field, and particularly a kind of particular manufacturing craft device of pure shear extruding preparation ultra-fine grain tubing is particularly suitable for the production of ultra-fine grain tubing.
Background technology ultra-fine grain tubing is that the preparation of pipes process technology is pursued the high-end product that obtains because of having good plasticity toughness and higher intensity.Owing to have comprehensive mechanical property well, thereby be widely used in industry such as cool-heat-exchanger, chemical building material, pipe fitting deep processing.For ultra-fine grain tubing, the processing molding method of preparation process is one of problem of most critical, guarantees that obtaining to have uniform ultra-fine grain heterogeneous microstructure is the major technology problem.
Ultra-fine grain tubing has some preparation method for processing at present, mainly be rolling, extruding and forging etc., utilize the ultra-fine grain tubing of these method preparations, need repeatedly distortion, topmost shortcoming is that each distortion must reduce the caliber and the pipe thickness of tubing and be easy to produce uneven distortion, and needs very big operating pressure.This will seek out ultra-fine grain for the tubing that intended size requires, and must begin distortion from very big wall thickness and caliber, thereby need many molds and multiple working procedure.For the material that this is big for resistance of deformation, deformation temperature is high, its manufacturing cost is sizable.Existing pure shear extrusion technique method can only be out of shape solid circle, square rods, can not implement extruding preparation ultra-fine grain to tubing.
Summary of the invention the purpose of this invention is to provide a kind of caliber of multiple material, short flow process, high efficiency, low cost, the each distortion of realization and method and apparatus of the indeclinable pure shear extruding of tube wall preparation ultra-fine grain tubing of being applicable to.
Technical conceive of the present invention is by changing the mode of texturing of extrusion molding, realized the pure shear crimp of tubing, the particular manufacturing craft device promptly is set on extruder, pipe is out of shape from described extrusion die device on extruder, this distortion can repeatedly be carried out repeatedly, finally makes the interior microscopic tissue of tubing become ultra-fine grain.
The realization pipe is made the tubing that interior tissue is a ultra-fine grain, and the macro-size of pipe does not change in preparation process, and inner tissue has all even homogeneity.Because the distortion of pipe concentrates on the corner of recipient, distortion has pure shear, and the pipe distortion is carried out in mould, obtains the tubing of ultra-fine grain by repeated deformation repeatedly.Each distortion can be changeed 0 °～180 ° to becoming along extrusion axis, improves each deformation extent, accelerates the refinement speed of crystal grain; The angle of recipient corner is changed to 90 °～160 °, adapts to different blank tube material.The inventive method is by changing the mode of texturing of extrusion molding, has realized that the tubing interior microscopic organizes ultra-fineization of grain size, and the mechanical property and the metallurgical quality that improve tubing also reduce cost.
Technical solution of the present invention is, a kind of equipment of pure shear extruding preparation ultra-fine grain tubing, comprise recipient 1, following recipient 2 and be contained in the last recipient 1 that links together, the heating jacket 3 outside the following recipient 2, its special, also comprise the pressure ram 4, support ring 5 and the plug 6 that are contained in the hollow in recipient 1, the following recipient 2, the upper end of plug 6 is inserted in 4 li of pressure rams, and support ring 5 is passed in the lower end of plug 6.
A kind of pure shear extruding prepares the method for ultra-fine grain tubing, be that pipe 7 is put into recipient 1 from the upper end of plug 6, pressure ram 4 is pressed on the pipe 7, plug 6 passes pipe 7 and inserts pressure ram 4, support ring 5 is arranged on down the top of recipient 2, and the depression bar 4 of extruding downwards is when pipe 7 passes through the extruding corner of following recipient 2, the pure shear extruding makes the interior microscopic tissue of pipe 7 become ultra-fine grain, and the angle of the extruding corner of following recipient 2 is 90 °～160 °
When pipe 7 distortion of materials abilities are better, adopt less recipient corner, to increase deformation extent, to accelerate structure refinement speed;
When pipe 7 distortion of materials abilities are relatively poor, adopt bigger recipient corner, to reduce deformation extent, avoid tubing to crack;
In pipe 7 distortion of materials poor ability with when being easy to oxidation takes place, the pipe 7 outside protective sleeves that coat improve distortion and avoid oxidation.
When pipe 7 distortion of materials temperature are higher, adopt corresponding higher extrusion die temperature, and improve extrusion speed, and increase cooling provision in the tubing exit, avoid growing up of recrystal grain.
When in the equipment of pure shear extruding preparation ultra-fine grain tubing, being out of shape, change the direction of pipe 7 each distortion, promptly for distortion pipe once, when being out of shape, be 0 °～180 ° to becoming the angle of changeing along extrusion axis next time, can cooperate the distortion of rotation angle position like this, increase each deformation extent, accelerate structure refinement speed and uniformity.
The present invention has following beneficial effect:
1. when adopting the present invention to prepare ultra-fine grain tubing, by changing the mode of texturing of extrusion molding, realized the microstructure refinement of tubing, direct convenience ground obtains the tubing of ultra-fine grain, is applicable to the pipe of multiple material.
2. the pipe that adopts the present invention to carry out difficult distortion and be easy to oxidation material prepares ultra-fine grain tubing.
3. adopt that production of the present invention is easy to implement, flow process is short, little to size, the material limitation of tubing, be easy to control the grain size and the metallurgical quality of tubing, can reduce manufacturing cost and difficulty of preparation technology, can guarantee the homogeneity of connecting leg material internal soundness.
4. the present invention is particularly useful for making ultra-fine grain tubing, also can cooperate to change each deformation direction, increases deformation extent, and can obtain the extra fine microstructure even obtain nanocrystal, and the interior tissue good uniformity of tubing.
Description of drawings is described in further detail the present invention below in conjunction with drawings and Examples.
Fig. 1 is the device structure schematic diagram of pure shear extruding preparation ultra-fine grain tubing.
The specific embodiment
A kind of equipment of pure shear extruding preparation ultra-fine grain tubing, comprise recipient 1, following recipient 2 and be contained in the last recipient 1 that links together, the heating jacket 3 outside the following recipient 2, its special, also comprise the pressure ram 4, support ring 5 and the plug 6 that are contained in the hollow in recipient 1, the following recipient 2, the upper end of plug 6 is inserted in 4 li of pressure rams, and support ring 5 is passed in the lower end of plug 6.Be provided with and the consistent plug 6 of following recipient 2 corners in last recipient 1, following recipient 2, pipe 7 has been realized the pure shear distortion under the acting in conjunction of recipient and plug.
On extruder, utilize hot-extrusion method to make pipe, make the long pipe 7 of scale through preliminary finishing, in heat-treatment furnace, carry out destressing and homogenizing annealing, pipe after handling is carried out crimp in the dedicated extruded mould on the extruder, to be lubricated the inside and outside hole of pipe and extrusion die inner core and plug, should mate mutually between the technological parameters such as the preheat temperature of extrusion die, pipe preheat temperature, extrusion speed in the extrusion process used for forming, specifically according to the material of distortion pipe and the ultrafine grain size decision of size and preparation.Wrought aluminium alloy LF6 heavy wall pipe 20 * 5mm, the grain size of pipe is 5 μ m before extruding, adopts this method that pipe is carried out deformation process, can make its microstructure refinement and the macro-size of pipe is constant, obtains the tubing of ultra-fine grain; The recipient corner of distortion mould is 120 °, every distortion once, the relative extrusion axis of pipe changes 90 °, the long 200mm of pipe; Extrusion speed is 2m/min, and 200 ℃ of mold temperatures, pipe preheat temperature are 300 ℃, and crimp is carried out continuously, and middle no annealing process through 4 crimp, obtains the good tubing of inner uniform crystal particles, and its grain size is 0.8 μ m.
When relatively poor, adopt bigger extruding corner for the blank tube material deformability,, avoid tubing to crack to reduce deformation extent; Present embodiment: 7075 aluminium alloy pipe , 20 * 5mm, the long 200mm of pipe; The recipient corner of distortion mould is 135 °, every distortion once, the relative extrusion axis of pipe changes 90 °, extrusion speed 1m/min, 280 ℃ of mold temperatures, pipe preheat temperature are 350 ℃.
Embodiment 3
When described blank tube material is easy to oxidation takes place, adopt the outside protective sleeve that coats of tubing, improve the deformed region state, avoid oxidation; Be easy to the reactive metal and the alloy pipe thereof of oxidation,, adopt aluminium or Thin Stainless Steel suitcase to cover as Ti, Mg and alloy thereof etc.; Present embodiment MB2 magnesium alloy pipe 20 * 5mm, the long 200mm of pipe, surfaces externally and internally coats the 1mm fine aluminium and approaches; The recipient corner of distortion mould is 120 °, every distortion once, the relative extrusion axis of pipe changes 90 °, extrusion speed 2m/min, 220 ℃ of mold temperatures, pipe preheat temperature are 350 ℃.
Embodiment 4
Deformability in described blank tube material is very poor, and promptly the room temperature elongation at break is lower than at 15% o'clock, adopts inside and outside steel coated carbon or stainless steel protection cover, improves the state of deformed region, avoids ftractureing; Present embodiment NiAl-30Fe metal is asked compound alloy 20 * 5mm, the long 150mm of pipe, and surfaces externally and internally coats the 2mm low carbon steel plate; The recipient corner of distortion mould is 135 °, extrusion speed 8m/min, and 450 ℃ of mold temperatures, pipe preheat temperature are 1150 ℃.
Embodiment 5
Deformation temperature in described blank tube material is higher, when promptly extrusion temperature is higher than 500 ℃, adopts corresponding higher extrusion die temperature, should improve extrusion speed, and increases cooling provision in the tubing exit, avoids growing up of recrystal grain; Present embodiment TC4 titanium alloy 20 * 5mm, the long 150mm of pipe, surfaces externally and internally coats the 1mm corrosion resistant plate; The recipient corner of distortion mould is 135 °, extrusion speed 8m/min, 450 ℃ of mold temperatures, the pipe preheat temperature is 1100 ℃, air blast cooling is set but in the extrusion exit of tubing, cooling air flow velocity 10m/s, intake air temperature≤30 ℃, blowing mouth aperture 20.
Claims (5)
1. the equipment for preparing ultra-fine grain tubing is pushed in a pure shear, comprise recipient (1), following recipient (2) and be contained in the last recipient (1) that links together, the outer heating jacket (3) of following recipient (2), it is characterized in that, also comprise the pressure ram (4), support ring (5) and the plug (6) that are contained in the hollow in recipient (1), the following recipient (2), the upper end of plug (6) is inserted in pressure ram (4) lining, and support ring (5) is passed in the lower end of plug (6).
2. adopt the pure shear of the equipment of the described a kind of pure shear extruding preparation ultra-fine grain tubing of claim 1 to push the method for preparing ultra-fine grain tubing, it is characterized in that, pipe (7) is put into recipient (1) from the upper end of plug (6), pressure ram (4) is pressed on the pipe (7), plug (6) passes pipe (7) and inserts pressure ram (4), support ring (5) is arranged on down the top of recipient (2), downward extrusion depression bar (4), when pipe (7) passes through the extruding corner of following recipient (2), realize that the pure shear distortion makes the interior microscopic tissue of pipe (7) become ultra-fine grain, the angle of the recipient corner of following recipient (2) is 90 °～160 °.
3. pure shear extruding according to claim 2 prepares the method for ultra-fine grain tubing, it is characterized in that, when in the equipment of pure shear extruding preparation ultra-fine grain tubing, being out of shape, change the direction of the each distortion of pipe (7), promptly, when being out of shape, be 0 °～180 ° to becoming the angle of changeing along extrusion axis for distortion pipe once next time.
4. pure shear according to claim 2 extruding prepare the method for ultra-fine grain tubing, it is characterized in that, in pipe (7) distortion of materials poor ability, promptly the room temperature elongation at break is lower than 15% and when being easy to oxidation takes place, the outside coating of pipe (7) protective sleeve.
5. pure shear extruding according to claim 2 prepares the method for ultra-fine grain tubing, it is characterized in that, higher in pipe (7) distortion of materials temperature, be that extrusion temperature is when being higher than 500 ℃, adopt corresponding higher extrusion die temperature, and the raising extrusion speed, and cooled off in the tubing exit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03133491 CN1229192C (en) | 2003-06-21 | 2003-06-21 | Method and device for producing superfine crystal particle tube by pure cutting and extruding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03133491 CN1229192C (en) | 2003-06-21 | 2003-06-21 | Method and device for producing superfine crystal particle tube by pure cutting and extruding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1473670A true CN1473670A (en) | 2004-02-11 |
| CN1229192C CN1229192C (en) | 2005-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03133491 Expired - Fee Related CN1229192C (en) | 2003-06-21 | 2003-06-21 | Method and device for producing superfine crystal particle tube by pure cutting and extruding |
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| Country | Link |
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| CN (1) | CN1229192C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101856678A (en) * | 2010-06-29 | 2010-10-13 | 中南大学 | Device capable of realizing accurate control of equal-channel angular extrusion processing route |
| CN101240366B (en) * | 2003-03-10 | 2012-11-21 | 有限会社里那西美特利 | Method for processing metal body and apparatus for processing metal body |
| CN103191949A (en) * | 2013-04-15 | 2013-07-10 | 常州信息职业技术学院 | Semi-automatic extruding mould for manufacturing ultrafine grain material |
| CN105880310A (en) * | 2016-06-29 | 2016-08-24 | 重庆理工大学 | Forming mold and method for ultra-fine grain hollow magnesium alloy profile |
| CN110328250A (en) * | 2019-05-10 | 2019-10-15 | 燕山大学 | A kind of Equal Channel Angular Extrusion Processing method of tubing |
-
2003
- 2003-06-21 CN CN 03133491 patent/CN1229192C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101240366B (en) * | 2003-03-10 | 2012-11-21 | 有限会社里那西美特利 | Method for processing metal body and apparatus for processing metal body |
| CN101856678A (en) * | 2010-06-29 | 2010-10-13 | 中南大学 | Device capable of realizing accurate control of equal-channel angular extrusion processing route |
| CN103191949A (en) * | 2013-04-15 | 2013-07-10 | 常州信息职业技术学院 | Semi-automatic extruding mould for manufacturing ultrafine grain material |
| CN103191949B (en) * | 2013-04-15 | 2014-09-17 | 常州信息职业技术学院 | Semi-automatic extruding mould for manufacturing ultrafine grain material |
| CN105880310A (en) * | 2016-06-29 | 2016-08-24 | 重庆理工大学 | Forming mold and method for ultra-fine grain hollow magnesium alloy profile |
| CN105880310B (en) * | 2016-06-29 | 2017-07-28 | 重庆理工大学 | A kind of mould and forming method of the hollow magnesium alloy profiles of Ultra-fine Grained |
| CN110328250A (en) * | 2019-05-10 | 2019-10-15 | 燕山大学 | A kind of Equal Channel Angular Extrusion Processing method of tubing |
| CN110328250B (en) * | 2019-05-10 | 2020-06-02 | 燕山大学 | Equal-channel angular extrusion processing method for pipes |
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| Publication number | Publication date |
|---|---|
| CN1229192C (en) | 2005-11-30 |
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Owner name: DALIAN SUNNY TITANIUM INDUSTRY CO., LTD. Free format text: FORMER OWNER: DALIAN UNIVERSITY OF SCIENCE AND TECHNOLOGY Effective date: 20111216 |
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Free format text: CORRECT: ADDRESS; FROM: 116024 DALIAN, LIAONING PROVINCE TO: 116000 DALIAN, LIAONING PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20111216 Address after: 116000 Liaoning Province, Dalian City Economic and Technological Development Zone in Northeast Street No. 6 -1 Patentee after: Dalian Sunny Titanium Industry Co., Ltd. Address before: 116024 Liaoning, Dalian, Ganjingzi Ling Road, No. 2 Patentee before: Dalian University of Technology |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051130 Termination date: 20190621 |
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| CF01 | Termination of patent right due to non-payment of annual fee |