CN103316941A - Method for extruding large-aperture titanium alloy pipe - Google Patents
Method for extruding large-aperture titanium alloy pipe Download PDFInfo
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- CN103316941A CN103316941A CN2013102672653A CN201310267265A CN103316941A CN 103316941 A CN103316941 A CN 103316941A CN 2013102672653 A CN2013102672653 A CN 2013102672653A CN 201310267265 A CN201310267265 A CN 201310267265A CN 103316941 A CN103316941 A CN 103316941A
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Abstract
The invention relates to a method for extruding a large-aperture titanium alloy pipe. The method comprises the following steps of: (I) wrapping a copper sleeve, namely wrapping the inner and outer surfaces of a blank with the copper sleeve with the thickness being 2-3mm; (II) heating, namely putting the blank into an induction furnace, heating the blank to 910-930 DEG C and keeping the temperature for 20-25 minutes, wherein the heating power is 80-100KW during the heating period; (III) extruding, namely extruding the heated blank to a required size by utilizing a horizontal extruding machine, wherein the size of an extruding mould is as follows: the diameter of a working zone is 1.012 times the outer diameter of the large-aperture titanium alloy pipe; the radius of an inlet arc is 14.9-15.1mm; an outlet cone angle is 4.9-5.1 degrees; the diameter of a working zone of an extruding needle is 1.007 times the inner diameter of the large-aperture titanium alloy pipe; the diameter of an inner hole of the extruding needle is 34.9-35.1mm. According to the method, the industrial production of the large-aperture titanium alloy pipe is achieved.
Description
Technical field
The present invention relates to a kind of pressing method of large-bore titanium alloy pipe.
Background technology
Titanium alloy is a kind of novel structural material, and it has excellent combination property,, specific strength little such as density and fracture toughness is high, fatigue strength and the resistance to crack extension ability is good, low-temperature flexibility is good, etch resistant properties is excellent.Therefore he obtains increasingly extensive application at industrial departments such as Aeronautics and Astronautics, chemical industry, shipbuildings.Existing titanium alloy seamless pipe adopts perforation+rolling or extruding+rolling mode production more, and because being subject to the restriction of heating process and equipment, (150＜D≤610mm) development of titanium pipe production technology is comparatively slow, does not possess the condition of suitability for industrialized production for heavy caliber.
Summary of the invention
In order to overcome the above-mentioned deficiency of existing large-bore titanium alloy pipe production method, the invention provides a kind of large-bore titanium alloy pipe pressing method that can suitability for industrialized production.
The pressing method of this large-bore titanium alloy pipe comprises following step successively:
IThe parcel copper sheathing
At the thick copper sheathing of blank surfaces externally and internally parcel 2 ~ 3mm, the overall diameter of blank is 1.35 ~ 1.85 times of overall diameter of large-bore titanium alloy pipe; The interior diameter of blank is than the large 5 ~ 12mm of interior diameter of large-bore titanium alloy pipe; Copper sheathing at blank surfaces externally and internally parcel will play lubrication in hot extrusion process.
IIHeating
Blank is put into induction furnace, with the firing rate of 5～10mm/min blank is heated to 910～930 ℃ of target temperatures, temperature retention time 20～25min by room temperature; In the heating period, need take the low-power heating, heating power 80～100KW.
IIIExtruding
Utilize horizontal extruder that the blank that heats is expressed to and require size; The extrusion die size is as follows:
The diameter of extrusion die work band is 1.012 times of overall diameter of large-bore titanium alloy pipe; (because the overall diameter that cools off rear titanium alloy tube will dwindle)
The radius of extrusion die entrance circular arc is 15 ± 0.1mm;
Extrusion die outlet cone angle is 5 ± 0.1 °;
The diameter of squeezing needle work band is 1.007 times of interior diameter of large-bore titanium alloy pipe; (because the interior diameter that cools off rear titanium alloy tube will dwindle)
The diameter of squeezing needle endoporus is 35 ± 0.1 mm;
Be hot extruded into titanium alloy tube.
The present invention realizes the suitability for industrialized production of large-bore titanium alloy pipe by the mode of copper bush lubrication, induction furnace heating, horizontal type extruding.
Description of drawings
Fig. 1 is the axial cutaway view of extrusion die of the present invention.
Fig. 2 is the axial cutaway view of squeezing needle of the present invention.
Fig. 3 is the partial enlarged drawing of right-hand member among Fig. 2.
Among above-mentioned Fig. 1:
1-extrusion die lateral surface, 2-extrusion die entrance circular arc, 3-extrusion die work band
4-feed side end face, 5-extrusion die outlet cone angle, 6-exit side end face
Among above-mentioned Fig. 2:
7-squeezing needle work band determines hole dimension in the extruded tube
8-squeezing needle targeting part forms Closed End with dummy block, prevents that metal from flowing backwards
9-squeezing needle endoporus is used for the circulation of squeezing needle inner cold water
10-squeezing needle connecting thread.
The specific embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with embodiment and accompanying drawing thereof, but the specific embodiment of the present invention is not limited to following embodiment.
Embodiment
The external diameter of the titanium alloy tube of the present embodiment extruding is that Φ 172mm internal diameter is Φ 134mm, long 4000 mm.Used material is titanium alloy TC 4, and the mass percent of its chemical composition is:
Fe 0.2； C 0.08； N 0.04； H 0.010； O 0.1；
Al 6.2; V 4.5; All the other are Ti and inevitable impurity.
The present embodiment is with 320 serial recipients.(being the standard of the industry)
Blank external diameter Φ 306mm; Blank internal diameter Φ 140mm;
Extruding specification Φ 172 * 19 mm;
The extrusion die that the present embodiment is used and squeezing needle are seen Fig. 1 and Fig. 2, the diameter of phi 174mm of extrusion die work band 3; The diameter of phi 135mm of squeezing needle work band 7; Extrusion die entrance arc radius 2 is 15mm, and extrusion die outlet cone angle 5 is 5 °; The diameter 140mm of squeezing needle targeting part 8; The diameter of squeezing needle endoporus 9 is 35 mm.
The embodiment of the pressing method of this large-bore titanium alloy pipe comprises following step successively:
IThe parcel copper sheathing
At blank surfaces externally and internally parcel copper sheathing.
The stainless steel hot extruding is generally lubricated with glass dust, and for the titanium alloy hot extrusion, be subject to the low restriction of heating-up temperature, can cause greatly the phenomenons such as vexed car, broken needle because of frictional force with glass dust is lubricated, adopt the lubricating system of parcel copper sheathing then can play good lubricant effect.
IIHeating
Blank is put into induction furnace, utilize induction furnace, blank is heated to target temperature by room temperature.Because the Kelvin effect of eddy-current heating very easily makes the copper sheathing of blank surface because of too fast the breaking of heating up, therefore in the heating period, need take the low-power heating, guarantee the integrality of copper sheathing in heating process.
Firing equipment HWT induction furnace; 920 ℃ of target temperatures;
Heating power 90KW; Temperature retention time 22min;
IIIExtruding
Blank and extrusion die and squeezing needle are installed in the 6000T horizontal extruder, and being squeezed into external diameter Φ 172mm internal diameter is Φ 134mm, the titanium alloy tube of long 4000 mm.
The large-bore titanium alloy extruded tube increases owing to extrusion ratio causes pushing greatly breakthrough power, the restriction that is subjected to heating process and produces equipment, and one of its suitability for industrialized production is restricted, and the 6000T horizontal extruder makes its suitability for industrialized production obtain possibility.
Claims (1)
1. the pressing method of a large-bore titanium alloy pipe, it comprises following step successively:
IThe parcel copper sheathing
At the thick copper sheathing of blank surfaces externally and internally parcel 2 ~ 3mm, the overall diameter of blank is 1.35 ~ 1.85 times of overall diameter of large-bore titanium alloy pipe; The interior diameter of blank is than the large 5 ~ 12mm of interior diameter of large-bore titanium alloy pipe;
IIHeating
Blank is put into induction furnace, with the firing rate of 5～10mm/min blank is heated to 910～930 ℃ of target temperatures, temperature retention time 20～25min by room temperature; In the heating period, take the low-power heating, heating power 80～100KW;
IIIExtruding
Utilize horizontal extruder that the blank that heats is expressed to and require size; The extrusion die size is as follows:
The diameter of extrusion die work band is 1.012 times of overall diameter of large-bore titanium alloy pipe;
The radius of extrusion die entrance circular arc is 15 ± 0.1mm;
Extrusion die outlet cone angle is 5 ± 0.1 °;
The diameter of squeezing needle work band is 1.007 times of interior diameter of large-bore titanium alloy pipe;
The diameter of squeezing needle endoporus is 35 ± 0.1 mm;
Be hot extruded into titanium alloy tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310267265.3A CN103316941B (en) | 2013-06-30 | 2013-06-30 | The pressing method of large-bore titanium alloy pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310267265.3A CN103316941B (en) | 2013-06-30 | 2013-06-30 | The pressing method of large-bore titanium alloy pipe |
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| Publication Number | Publication Date |
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| CN103316941A true CN103316941A (en) | 2013-09-25 |
| CN103316941B CN103316941B (en) | 2016-01-27 |
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| CN201310267265.3A Active CN103316941B (en) | 2013-06-30 | 2013-06-30 | The pressing method of large-bore titanium alloy pipe |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103736732A (en) * | 2013-12-26 | 2014-04-23 | 内蒙古北方重工业集团有限公司 | Machining method of cogging extrusion of large diameter steel pipe |
| CN103909111A (en) * | 2014-03-27 | 2014-07-09 | 攀钢集团成都钢钒有限公司 | Titanium alloy seamless tube and production method thereof |
| CN108747246A (en) * | 2018-04-27 | 2018-11-06 | 宁夏德运创润钛业有限公司 | A kind of preparation method for squeezing the extrusion die of titanium or titanium alloy tube rod |
| CN111036705A (en) * | 2019-12-19 | 2020-04-21 | 湖南金天钛业科技有限公司 | Large-caliber titanium alloy seamless pipe and preparation method thereof |
Citations (5)
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|---|---|---|---|---|
| GB774693A (en) * | 1954-04-14 | 1957-05-15 | Ass Elect Ind | Improvements relating to the lubrication of metallic surfaces |
| CN86106477A (en) * | 1986-09-29 | 1988-04-13 | 宝鸡有色金属加工厂 | The method of double-deck jacket extruding titanium alloy |
| CN101284284A (en) * | 2008-05-09 | 2008-10-15 | 常荣波 | Extrusion process of titanium copper composite type material |
| CN101284350A (en) * | 2008-05-09 | 2008-10-15 | 常荣波 | Titanium and titanium alloy sectional materials machining technique |
| CN101733641A (en) * | 2009-12-18 | 2010-06-16 | 西北有色金属研究院 | Manufacturing method of large-calibre seamless titanium alloy barrel body |
-
2013
- 2013-06-30 CN CN201310267265.3A patent/CN103316941B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB774693A (en) * | 1954-04-14 | 1957-05-15 | Ass Elect Ind | Improvements relating to the lubrication of metallic surfaces |
| CN86106477A (en) * | 1986-09-29 | 1988-04-13 | 宝鸡有色金属加工厂 | The method of double-deck jacket extruding titanium alloy |
| CN101284284A (en) * | 2008-05-09 | 2008-10-15 | 常荣波 | Extrusion process of titanium copper composite type material |
| CN101284350A (en) * | 2008-05-09 | 2008-10-15 | 常荣波 | Titanium and titanium alloy sectional materials machining technique |
| CN101733641A (en) * | 2009-12-18 | 2010-06-16 | 西北有色金属研究院 | Manufacturing method of large-calibre seamless titanium alloy barrel body |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103736732A (en) * | 2013-12-26 | 2014-04-23 | 内蒙古北方重工业集团有限公司 | Machining method of cogging extrusion of large diameter steel pipe |
| CN103909111A (en) * | 2014-03-27 | 2014-07-09 | 攀钢集团成都钢钒有限公司 | Titanium alloy seamless tube and production method thereof |
| CN108747246A (en) * | 2018-04-27 | 2018-11-06 | 宁夏德运创润钛业有限公司 | A kind of preparation method for squeezing the extrusion die of titanium or titanium alloy tube rod |
| CN111036705A (en) * | 2019-12-19 | 2020-04-21 | 湖南金天钛业科技有限公司 | Large-caliber titanium alloy seamless pipe and preparation method thereof |
| CN111036705B (en) * | 2019-12-19 | 2021-07-02 | 湖南金天钛业科技有限公司 | Large-caliber titanium alloy seamless pipe and preparation method thereof |
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| CN103316941B (en) | 2016-01-27 |
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