CN103627927A - Titanium alloy extruded pipe or rolled pipe and preparation method thereof - Google Patents
Titanium alloy extruded pipe or rolled pipe and preparation method thereof Download PDFInfo
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Abstract
The invention relates to titanium alloy, and specifically relates to a titanium alloy TC4 extruded pipe or rolled pipe and a preparation method thereof. The titanium alloy is composed of, in percent by weight, 5.5-6.75% of Al, 3.5-4.5% of V, 0.1% or less of Fe, 0.1% or less of C, 0.03% or less of N, 0.015% or less of H, 0.15% or less of O, and the balance Ti. The preparation method of the titanium alloy (TC4) pipe comprises stress-relieving annealing, complete-recrystalization annealing and solution ageing heat treatment, and the obtained titanium alloy (TC4) pipe has the tensile strength of 800-1300 MPa and the elongation percentage of 8-25%.
Description
Technical field
The present invention relates to titanium alloy tube and preparation thereof, specifically a kind of titanium alloy TC 4 extruded tube, rolled tube and preparation method thereof.
Background technology
Development along with titanium alloy, more and more demand high strength, high tenacity, high temperature resistant and corrosion resistant titanium alloy, especially titanium alloy pipe demand is more and more, and the difficulty of processing of titanium alloy pipe is increasing, titanium alloy TC 4 tubing major applications in oil field, the industry such as Nuclear power plants, chemical industry, and present titanium alloy TC 4 tubing be all conventionally sheet material volume weldering, bar draw hole, hinge in outer car after cross piercing, current domesticly do not have one can push, roll out titanium alloy (TC4) tubing.
Summary of the invention
The object of the present invention is to provide a kind of titanium alloy (TC4) pipe that is suitable for modern market demand.
For achieving the above object, the technical solution used in the present invention is:
Titanium alloy (TC4) extruded tube, a rolled tube, alloy composition is by weight percentage: Ti surplus, Al (5.5 ~ 6.75) %, V (3.5 ~ 4.5) %, Fe≤0.1%, C≤0.1%, N≤0.03%, H≤0.015%, O≤0.15%;
The preparation method of described titanium alloy (TC4) extruded tube, rolled tube:
This titanium alloy tube (TC4) preparation for processing is chosen one of following three kinds, and the first is that excellent base is drawn and carried out extrusion processing after hole, copper-clad and become pipe, then will after pipe butt end, directly obtain production tube; The second is to carry out extrusion processing after excellent base is drawn hole, copper-clad, obtains pipe, and finishing pipe, carries out cold rolling; The third is to carry out extrusion processing, obtains pipe, and finishing pipe, carries out temperature (heat) rolling;
Before extruding titanium alloy tube, hole is drawn in titanium alloy optical wand center, after copper-clad, be put in process furnace and heat 600 ~ 1300 ℃, be incubated 0.5 ~ 6 hour, when bar reaches extruding while requiring temperature, by extrusion machine, carry out air cooling after extrusion processing, aligning, tack obtains finished product extruded tube after cooling.
When the titanium alloy pipe of rolling extruding, pipe and semifinished tube surfaces externally and internally add lubricant, then be rolled, often roll a pipe after passage and will carry out pickling, pickling after washing, then blank will carry out oxidizing annealing, and the pipe after oxidizing annealing will carry out alkali cleaning, alkali cleaning after washing again; When going out finished product, passage of rolling do not carry out interior strand; When rolling the second passage goes out finished product, in the laggard row of rolling the first passage, twist; In a rolling 3-10 passage, go out finished product, when rolling first or second passage, carry out interior hinge; Monolateral 0 ~ the 0.8mm of interior hinge, all pares off oxide skin and the defect of blank before each passage;
The pipe of vacuum annealing will carry out pickling, pickling after washing again; Be rolled, adopt oxidizing annealing or vacuum annealing after mill product, the finished product of oxidizing annealing will carry out alkali cleaning, alkali cleaning after washing again; The finished product of vacuum annealing will carry out pickling, pickling after washing; This titanium alloy (TC4) rolled tube performance is good, and tube surfaces quality is good.
Finished product after oxidizing annealing will carry out alkali cleaning, alkali cleaning after washing again, obtains final product.
When temperature (heat) is rolled extrusion tube blank, online or off-line heating pipe is rolled, and Heating temperature is 400 ~ 1300 ℃ of insulations 0 ~ 90 minute.
Every time deflection is 15% ~ 85%, roll speed (20 ~ 90) beat/min, and rolling goes out finished product 1-10 time.When this titanium alloy pipe of rolling, pipe or semifinished tube surfaces externally and internally add lubricant, then be rolled, often roll a blank after passage and will carry out pickling, pickling after washing, then pipe adopts oxidizing annealing, and oxidizing annealing temperature is 500 ~ 900 ℃ of insulations 0.5 ~ 3 hour, and the pipe after oxidizing annealing will carry out alkali cleaning, alkali cleaning after washing, each passage rolling reduction is 15% ~ 85%, and roll speed is 20 ~ 90 beats/min; When going out finished product, passage of rolling do not carry out interior strand, when rolling the second passage goes out finished product, in the laggard row of rolling the first passage, twist, in a rolling 3-10 passage, go out finished product, when rolling first or second passage, carry out the monolateral 0 ~ 0.8mm of interior hinge, oxide skin and defect are all pared off, then be rolled, rolling is 1-10 passage, finished product after rolling completes adopts oxidizing annealing or vacuum annealing, and the annealing temperature of oxidizing annealing is 500 ~ 900 ℃ of insulations 0.5 ~ 3 hour; The annealing temperature of vacuum annealing is 500 ~ 900 ℃ of insulations 0.5 ~ 3 hour, and the finished product after vacuum annealing will carry out pickling, pickling after washing again, obtains final product; Finished product after oxidizing annealing will carry out alkali cleaning, alkali cleaning after washing again, obtains final product.
The TC4 tubing intensity of this method rolling is high, good toughness and resistance to H
2s, CO
2deng corrosion, by the tensile strength (Rm) in its performance of titanium alloy TC 4 pipe of aforesaid method processing, reach 800 ~ 1300MPa, unit elongation 8 ~ 25%.
The present invention compared with prior art, has following beneficial effect:
1. intensity is high, corrosion-resistant: titanium alloy TC 4 extruded tube of the present invention, rolled tube intensity (Rm) (800 ~ 1300MPa) are than now conventional titanium alloy T A18 pipe (620MPa) high 180 ~ 680MPa, and erosion resistance is also managed considerably beyond TA18.
2. reduce costs, shorten the production cycle: after the rolling of existing titanium alloy pipe production process per pass, all will carry out vacuum annealing, and after titanium alloy TC 4 extrusion tube blank drawn and rolled tube production technique per pass of the present invention rolling, be all oxidized (antivacuum) annealing, so both reduce power consumption cost and also shortened the production cycle.
3. yield rate is high, and quality is good, and performance is excellent: TC4 extruded tube of the present invention is just by the finished product just obtaining after the pipe tack pushing, and the following process frequency is few, and yield rate is high; Rolled tube utilizes extrusion tube blank to be rolled, loss is little, yield rate is high, bar is drawn hole pipe needs to draw out a lot of bits waste products, loss is large, and yield rate is low, and bar is drawn the just quality and performance of bar of hole pipe, and TC4 extruded tube, rolled tube are to carry out deep processing on the basis of bar, bar is drawn the quality, performance of hole pipe far away from quality, the performance of TC4 rolled tube.
4. metal inside is organized: the present invention adopts TC4 extruded tube, rolled tube, metal inside tissue is than cutting with scissors many that pipe will be good in the outer car of perforation pipe, TC4 extruded tube, rolled tube are in the course of processing, anneal, can make crystal grain reply original state, during rolling to pipe longitudinally, a balanced power radially, make the inner grain structure of pipe matrix fine and close; And hinge pipe does not make crystal grain reply original state in the outer car of perforation pipe, and only have its grain structure pulling, so strand pipe metal structure does not have TC4 extruded tube, rolling to run well in the outer car of perforation pipe.
5. long service life: TC4 extruded tube of the present invention, the congenital dense structure of rolling seamless tube, sheet material welded tube is inconsistent at commissure structural state and matrix, easily cause fatigability intergranular cracking, so have TC4 rolling seamless tube than sheet material welded tube long service life.
6. domestic blank has been replenished in titanium alloy TC 4 extruded tube, rolled tube.
Embodiment
The present invention just can obtain new titanium alloy TC4 rolled tube by unique formula, working method and rolling technology, below by embodiment in detail the present invention is described in detail.
By feasibility test, study test and learn TC4 titanium alloy oil pipe tensile strength 917MPa, yield strength 819MPa, unit elongation 12.5%, TC4 titanium alloy oil pipe has excellent anti-H 2 S stress corrosion performance, pitting corrosion and anti-general corrosion performance, insensitive to hydrogen induced cracking (HIC), resistance to H under this experiment high-temperature and high-pressure conditions
2s/CO
2corrosive nature is good.
Adopt oxidizing annealing rolling: step is carried out routinely, first with raw material titanium sponge, vananum prepare burden (Ti surplus by weight percentage, Al (5.5 ~ 6.75) %, V (3.5 ~ 4.5) %, Fe≤0.1%, C≤0.1%, N≤0.03%, H≤0.015%, O≤0.15%; Raw material is mixed), extruding electrode, grid for welding, shove charge melting ingot casting, the sampling analysis that strips off the skin, forges bar (excellent base) with ingot casting, and the blanking of bar car light, draws hole with optical wand and is squeezed into pipe, then by pipe tack, obtain finished product; With optical wand, draw hole and be squeezed into pipe, then by pipe tack, split rolling method becomes pipe, degreasing, oxidizing annealing, interior hinge, rolling, repaiies and scrapes, alkali cleaning, pickling, washing, finish rolling finished product pipe, tack, annealing, sampling analysis, flaw detection, hydraulic pressure detect, scale blanking.
Alkaline wash in following embodiment, pickle solution weight proportion are
Alkaline wash: [85 ~ 95%NaOH+15 ~ 5%NaNO
3(or KNO
3)]
Pickle solution: [30 ~ 40%HNO
3+ 2 ~ 10%HF+ surplus H
2o]
Embodiment 1.
Concrete preparation process is as follows:
Φ 145 * 425mm optical wand is drawn to hole to Φ 145/ Φ 60 * 425mm; with copper sheet, wrapped; to reach when extruding, play profit effect and the effect of protection titanium alloy pipe; titanium alloy (TC4) blank of wrapping copper sheet is put into and in process furnace, heats 960 ℃, be incubated 2.5 hours; taking-up is squeezed to Φ 68 * 6mm pipe; copper sheet pickling is fallen, and clear water rinses, and just obtains production tube Φ 68 * 6mm after tack.700 ℃ of vacuum annealings, are incubated 2 hours, furnace cooling, and the finished product after vacuum annealing will carry out pickling, pickling after washing again, obtains final product; Its performance actual measurement of sampling analysis is Rm900 MPa, Rp0.2750MPa, and A 13%.
Embodiment 2.
Concrete preparation process is as follows:
Φ 145 * 325mm optical wand is drawn to hole to Φ 145/ Φ 39.5 * 325mm; with copper sheet, wrapped; to reach when extruding, play profit effect and the effect of protection titanium alloy pipe; titanium alloy (TC4) blank of wrapping copper sheet is put into and in process furnace, heats 800 ℃, be incubated 3 hours; taking-up is squeezed to Φ 45 * 4mm pipe; copper sheet pickling is fallen, and clear water rinses, and just obtains production tube Φ 45 * 4mm after tack.650 ℃ of vacuum annealings, are incubated 2 hours, furnace cooling, and the finished product after vacuum annealing will carry out pickling, pickling after washing again, obtains final product; Its performance actual measurement of sampling analysis is Rm960 MPa, Rp0.2 800MPa, and A 12%.
Embodiment 3.
Concrete preparation process is as follows:
Φ 425 * 625mm optical wand is drawn to hole to Φ 425/ Φ 163.7 * 625mm; with copper sheet, wrapped; to reach when extruding, play profit effect and the effect of protection titanium alloy pipe; titanium alloy (TC4) blank of wrapping copper sheet is put into and in process furnace, heats 1100 ℃, be incubated 2 hours; taking-up is squeezed to Φ 177.8 * 9.05mm pipe; copper sheet pickling is fallen, and clear water rinses, and just obtains production tube Φ 177.8 * 9.05mm after tack.750 ℃ of vacuum annealings, are incubated 2 hours, furnace cooling, and the finished product after vacuum annealing will carry out pickling, pickling after washing again, obtains final product; Its performance actual measurement of sampling analysis is Rm1000 MPa, Rp0.2 850MPa, and A 10%.
Embodiment 4.
Concrete preparation process is as follows:
1. the TC4 pipe being obtained by extruding
internal surface of bloom and plug (metal material, solid pole, bar gauge lattice depend on pipe or production tube internal diameter specification) interpolation oildag, carry out temperature (heat) rolling, on-line heating temperature is 700 ℃, and the first passage rolling reduction is 30%, 35 beats/min of roll speeds, after the pipe air cooling shutting out, carrying out oxidizing annealing temperature is 600 ℃ of insulations 2 hours, and the pipe after oxidizing annealing will carry out alkali cleaning, alkali cleaning after washing, checks defect and repaiies and scrape defect;
2. the monolateral Nei Jiao of pipe 50 roads that first gets off, internal surface and plug add oildag, carry out temperature (heat) rolling, on-line heating temperature is 650 ℃, second passage rolling reduction is 25%, 30 beats/min of roll speeds, and after the pipe air cooling shutting out, carrying out oxidizing annealing temperature is 600 ℃ of insulations 1.5 hours, pipe after oxidizing annealing will carry out alkali cleaning, alkali cleaning after washing, checks defect and repaiies and scrape defect;
3. the pipe that second gets off, internal surface and plug add oildag, carry out temperature (heat) rolling, on-line heating temperature is 600 ℃, the 3rd passage rolling reduction is 30%, 30 beats/min of roll speeds, and after the pipe air cooling shutting out, carrying out oxidizing annealing temperature is 550 ℃ of insulations 1.5 hours, pipe after oxidizing annealing will carry out alkali cleaning, alkali cleaning after washing, checks defect and repaiies and scrape defect;
The pipe that 4. gets off in tri-roads, internal surface and plug add oildag, carry out temperature (heat) rolling, and on-line heating temperature is 550 ℃, and the 4th passage rolling reduction is 25%, and 30 beats/min of roll speeds go out finished product after the pipe air cooling shutting out; Finished products has following two kinds of modes.
5. the first finished products:
650 ℃ of oxidizing annealings, 2 hours, air cooling, the finished product after oxidizing annealing will carry out alkali cleaning, alkali cleaning after washing again, obtains final product; Its performance actual measurement of sampling analysis is Rm970MPa, Rp0.2 800MPa, and A 11%;
6. the second finished products:
750 ℃ of vacuum annealings, are incubated 2 hours, furnace cooling, and the finished product after vacuum annealing will carry out pickling, pickling after washing again, obtains final product; Its performance actual measurement of sampling analysis is Rm950 MPa, Rp0.2 780MPa, and A 12%.
Embodiment 5.
Concrete preparation process is as follows:
1. the TC4 pipe being obtained by extruding
internal surface of bloom and plug (metal material, solid pole, bar gauge lattice depend on pipe or production tube internal diameter specification) interpolation oildag, carry out temperature (heat) rolling, on-line heating temperature is 1100 ℃, and the first passage rolling reduction is 35%, 35 beats/min of roll speeds, after the pipe air cooling shutting out, carrying out oxidizing annealing temperature is 900 ℃ of insulations 3 hours, and the pipe after oxidizing annealing will carry out alkali cleaning, alkali cleaning after washing, checks defect and repaiies and scrape defect;
2. the monolateral Nei Jiao of pipe 50 roads that first gets off, internal surface and plug add oildag, carry out temperature (heat) rolling, on-line heating temperature is 1000 ℃, second passage rolling reduction is 40%, 35 beats/min of roll speeds, and after the pipe air cooling shutting out, carrying out oxidizing annealing temperature is 800 ℃ of insulations 3 hours, pipe after oxidizing annealing will carry out alkali cleaning, alkali cleaning after washing, checks defect and repaiies and scrape defect;
3. the pipe that second gets off, internal surface and plug add oildag, carry out temperature (heat) rolling, on-line heating temperature is 900 ℃, the 3rd passage rolling reduction is 40%, 35 beats/min of roll speeds, and after air cooling, carrying out oxidizing annealing temperature is 800 ℃ of insulations 2.5 hours, pipe after oxidizing annealing will carry out alkali cleaning, alkali cleaning after washing, checks defect and repaiies and scrape defect;
The pipe that 4. gets off in tri-roads, internal surface and plug add oildag, carry out temperature (heat) rolling, and on-line heating temperature is 800 ℃, and the 4th passage rolling reduction is 35%, and 30 beats/min of roll speeds, go out finished product after air cooling; Finished products has following two kinds of modes.
5. the first finished products:
650 ℃ of oxidizing annealings, 2 hours, air cooling, the finished product after oxidizing annealing will carry out alkali cleaning, alkali cleaning after washing again, obtains final product; Its performance actual measurement of sampling analysis is Rm950MPa, Rp0.2 810MPa, and A 11%;
6. the second finished products:
750 ℃ of vacuum annealings, are incubated 2 hours, furnace cooling, and the finished product after vacuum annealing will carry out pickling, pickling after washing again, obtains final product; Its performance actual measurement of sampling analysis is Rm920 MPa, Rp0.2 800MPa, and A 12.5%.
Embodiment 6.
Concrete preparation process is as follows:
1. the TC4 pipe being obtained by extruding
pipe surfaces externally and internally adds respectively paraffin, grease based on molybdenum disulfide lithium lubricant, carry out cold rolling, the first passage rolling reduction is 30%, 30 beats/min of roll speeds, the pipe shutting out carries out pickling, pickling after washing, monolateral Nei Jiao 50 roads, and carrying out oxidizing annealing temperature is 900 ℃ of insulations 2.5 hours, pipe after oxidizing annealing will carry out alkali cleaning, alkali cleaning after washing, checks defect and repaiies and scrape defect;
2. the pipe surfaces externally and internally that first gets off adds respectively paraffin, grease based on molybdenum disulfide lithium lubricant, carry out cold rolling, second passage rolling reduction is 35%, 35 beats/min of roll speeds, and the pipe shutting out carries out pickling, pickling after washing, roll rear two ends and respectively ftracture 3 centimeters, intermediate surface quality is better, cuts termination, and carrying out oxidizing annealing temperature is 850 ℃ of insulations 2.5 hours, pipe after oxidizing annealing will carry out alkali cleaning, alkali cleaning after washing, repaiies and scrapes defect.
3. the pipe surfaces externally and internally that second passage got off adds respectively paraffin, grease based on molybdenum disulfide lithium lubricant, carry out cold rolling, the 3rd passage rolling reduction is 35%, 35 beats/min of roll speeds, the pipe shutting out carries out pickling, pickling after washing, carrying out oxidizing annealing temperature is 800 ℃ of insulations 2.5 hours, and the pipe after oxidizing annealing will carry out alkali cleaning, alkali cleaning after washing, repaiies and scrapes defect.
4. the pipe surfaces externally and internally that the 3rd passage got off adds respectively paraffin, grease based on molybdenum disulfide lithium lubricant, is rolled, and the 4th passage rolling reduction is 30%, mill product
35 beats/min of roll speeds, shut out finished product; Finished products has following two kinds of modes.
5. the first finished products:
650 ℃ of oxidizing annealings, 2.5 hours, air cooling, (840 ~ 960 ℃ of solid solutions, 29 ~ 61 seconds, air cooling or water-cooled, 470 ~ 570 ℃ of actual effects, 4 ~ 8 hours, air cooling after solid solution aging.Finished product after solid solution aging will carry out alkali cleaning, alkali cleaning after washing again, obtains final product; Its performance actual measurement of sampling analysis is Rm1150MPa, Rp0.2 1030MPa, and A 9%;
6. the second finished products:
650 ℃ of vacuum annealings, are incubated 2.5 hours, furnace cooling, (840 ~ 960 ℃ of solid solutions, 29 ~ 61 seconds, air cooling or water-cooled, 470 ~ 570 ℃ of actual effects, 4 ~ 8 hours, air cooling after solid solution aging.Finished product after solid solution aging will carry out alkali cleaning, alkali cleaning after washing again, obtains final product; Its performance actual measurement of sampling analysis is Rm1050 MPa, Rp0.2 950MPa, and A 11%.
Claims (8)
1. titanium alloy TC 4 extruded tube or a rolled tube, is characterized in that:
Alloy composition is by weight percentage: Ti surplus, Al (5.5 ~ 6.75) %, V (3.5 ~ 4.5) %, Fe≤0.1%, C≤0.1%, N≤0.03%, H≤0.015%, O≤0.15%.
2. a preparation method for titanium alloy extruded tube or rolled tube described in claim 1, is characterized in that:
This titanium alloy tube (TC4) preparation for processing is chosen one of following three kinds, and the first is that excellent base is drawn and carried out extrusion processing after hole, copper-clad and become pipe, then by directly obtaining production tube after pipe butt end, obtains extruded tube; The second is to carry out extrusion processing after excellent base is drawn hole, copper-clad, obtains pipe, and finishing pipe, carries out cold rolling, obtains rolled tube; The third is to carry out extrusion processing, obtains pipe, and finishing pipe, carries out temperature (heat) rolling, obtains rolled tube.
3. according to the preparation method of titanium alloy extruded tube or rolled tube described in claim 2, it is characterized in that:
Before extruding titanium alloy tube, hole is drawn in titanium alloy optical wand center, after copper-clad, be put into and in process furnace, heat 600 ~ 1300 insulation 0.5 ~ 6 hour, when bar reaches extruding while requiring temperature, by extrusion machine, carry out extrusion processing, the rear air cooling of aligning, obtain pipe, pipe surface is gone to carry out pickling, washing after copper, then carry out vacuum annealing, 500 ~ 900 ℃ of annealing temperatures, are incubated 0.5 ~ 3 hour, and pipe is come out of the stove after cooling and aligned, check and analyze, detecting qualified rear tack and obtain finished product extruded tube.
4. according to the preparation method of titanium alloy extruded tube or rolled tube described in claim 2, it is characterized in that:
When the titanium alloy pipe of rolling extruding, pipe or semifinished tube surfaces externally and internally add lubricant, then be rolled, often roll a pipe after passage and will carry out pickling, pickling after washing, then blank will carry out oxidizing annealing, and the pipe after oxidizing annealing will carry out alkali cleaning, alkali cleaning after washing again; When going out finished product, passage of rolling do not carry out interior strand; When rolling the second passage goes out finished product, in the laggard row of rolling the first passage, twist; In a rolling 3-10 passage, go out finished product, when rolling first or second passage, carry out interior hinge; Monolateral 0 ~ the 0.8mm of interior hinge, all pares off oxide skin and the defect of blank before each passage;
The pipe of vacuum annealing will carry out pickling, pickling after washing again; Be rolled, adopt oxidizing annealing or vacuum annealing after mill product, the finished product of oxidizing annealing will carry out alkali cleaning, alkali cleaning after washing again; The finished product of vacuum annealing will carry out pickling, pickling after washing.
5. according to the preparation method of titanium alloy extruded tube or rolled tube described in claim 2 or 3, it is characterized in that:
600 ~ 1300 ℃ of the Heating temperatures of extrusion tube blank blank used, are incubated 0.5 ~ 6 hour;
When temperature (heat) is rolled extrusion tube blank, online or off-line heating pipe is rolled, and Heating temperature is 400 ~ 1300 ℃ of insulations 0 ~ 90 minute;
Tensile strength (Rm) in the titanium alloy of being prepared by aforesaid method (TC4) extruded tube, rolled tube performance can reach (800 ~ 1300) MPa after normal heat processing and solid solution aging, and unit elongation is at (8 ~ 25) %.
6. according to the preparation method of titanium alloy extruded tube or rolled tube described in claim 2, it is characterized in that: extruded tube, rolled tube specification are one of the following;
Pipe external diameter
0.5 ~ 35mm (but external diameter must be greater than 2 with the ratio of wall thickness) * length 100 ~ 12000mm;
Square tube 30 ~ 360mm * 30 ~ 360mm * wall thickness 0.5 ~ 35mm (but each length of side must be greater than adjacent 2 wall thickness sums) * length 100 ~ 12000mm;
Special pipe, special pipe large head external diameter must be greater than small head external diameter, and wall thickness is sample, is the hollow body large head external diameter diminishing gradually by major part to microcephaly
0.5 ~ 35mm (but external diameter must be greater than 2 with the ratio of wall thickness) * small head external diameter
0.5 ~ 35mm (but external diameter must be greater than 2 with the ratio of wall thickness) * length 100 ~ 12000mm, special pipe large head external diameter must be greater than small head external diameter.
7. according to the preparation method of titanium alloy extruded tube, rolled tube described in claim 2 or 3, it is characterized in that: described lubricant is paraffin, molybdenumdisulphide or grease based on molybdenum disulfide lithium, ROLLING OIL or machine oil.
8. according to the preparation method of titanium alloy extruded tube, rolled tube described in claim 2 or 3, it is characterized in that:
With extrusion tube blank in this titanium alloy pipe process of rolling, often roll a blank after passage and will carry out pickling, pickling after washing, then pipe carries out oxidizing annealing, annealing temperature is 500 ~ 900 ℃ of insulations 0.5 ~ 3 hour, and the pipe after oxidizing annealing will carry out alkali cleaning, alkali cleaning after washing, and the defect on pipe is all pared off, pipe or semifinished tube surfaces externally and internally add lubricant, then be rolled, each pass deformation of rolling is 15% ~ 85%, and roll speed is 20 ~ 90 beats/min;
Finished product after rolling completes adopts oxidizing annealing or vacuum annealing, and the annealing temperature of oxidizing annealing is 500 ~ 900 ℃ of insulations 0.5 ~ 3 hour; The annealing temperature of vacuum annealing is 500 ~ 900 ℃ of insulations 0.5 ~ 3 hour; The pipe finished product of vacuum annealing will carry out pickling, pickling after washing again; Production tube after oxidizing annealing will carry out alkali cleaning, alkali cleaning after washing.
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