CN105369061A - Titanium alloy BT14 seamless tube and preparation method thereof - Google Patents
Titanium alloy BT14 seamless tube and preparation method thereof Download PDFInfo
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- CN105369061A CN105369061A CN201410393256.3A CN201410393256A CN105369061A CN 105369061 A CN105369061 A CN 105369061A CN 201410393256 A CN201410393256 A CN 201410393256A CN 105369061 A CN105369061 A CN 105369061A
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Abstract
The present invention relates to a titanium alloy, particularly to a titanium alloy BT14 titanium alloy tube and a preparation method thereof, wherein the alloy comprises 3-7% of Al, 1-5% of Mo, 0.5-4% of V, 1-5% of Cr, 1-5% of Mn, less than or equal to 0.3% of Fe, less than or equal to 0.08% of C, less than or equal to 0.05% of N, less than or equal to 0.015% of H, less than or equal to 0.2% of O, and the balance of Ti. The titanium alloy seamless tube processing way comprises the following five ways: 1, sequentially carrying out thermal piercing and rolling, 2, sequentially carrying out thermal piercing, thermal forging molding and machining, 3, sequentially carrying out thermal piercing and machining, 4, carrying out thermal extrusion to prepare a tube billet, and then carrying out finished product tube rolling, and 5, carrying out thermal extrusion to prepare a tube billet, and then carrying out thermal forging molding and machining or directly machining to obtain the finished product tube. The method is mainly characterized in that the titanium alloy BT14 seamless tube produced according to the five ways has characteristics of metal grain refining and compact structure so as to substantially improve the performance of the material.
Description
Technical field
The present invention relates to titanium alloy tube and preparation thereof, specifically a kind of titanium alloy BT14 seamless tube and preparation method thereof.
Background technology
Along with the development of titanium alloy, more and more demand high strength, high tenacity, high temperature resistant and corrosion resistant titanium alloy, especially titanium alloy pipe demand gets more and more, and the difficulty of processing of titanium alloy pipe is increasing, titanium alloy BT14 tubing major applications in oil field, the industry such as Nuclear power plants, chemical industry, and present titanium alloy BT14 tubing be all the weldering of sheet material volume usually, bar draws hole.
Summary of the invention
The object of the present invention is to provide a kind of titanium alloy BT14 seamless tube being suitable for modern market demand, for achieving the above object, the technical solution used in the present invention is:
Alloy composition is by weight percentage: Al (3 ~ 7) %, Mo (1 ~ 5) %, V (0.5 ~ 4) %, Cr (1 ~ 5) %, Mn (1 ~ 5) %, and surplus is titanium.
Alloy composition is by weight percentage: Al (3 ~ 7) %, Mo (1 ~ 5) %, V (0.5 ~ 4) %, Cr (1 ~ 5) %, Mn (1 ~ 5) %, Fe≤0.3%, C≤0.08%, N≤0.05%, H≤0.015%, O≤0.2%; Surplus is titanium.
The specification limit of titanium alloy BT14 seamless tube:
Pipe:
Or, square tube: the length of side 10 ~ 1500mm × length of side 10 ~ 1500mm × wall thickness 0.9 ~ 400mm (but each length of side must be greater than adjacent 2 wall thickness sums) × length 100 ~ 18000mm;
Or, special pipe:
special pipe large head external diameter must be greater than small head external diameter.
The preparation method of titanium alloy BT14 seamless tube is:
According to a conventional method above-mentioned raw materials is processed into excellent blank;
Prepare pipe by the mode of hot extrusion or hot piercing, production tube preparation method is one of following 5 kinds,
The first is rolled after hot piercing;
The second be carry out after hot piercing heat forged shaping after carry out the production tube that machining obtains;
The third directly carries out the production tube that machining obtains after hot piercing;
4th kind is carry out mill product pipe after pipe is prepared in hot extrusion;
5th kind is carry out the shaping rear machining of heat forged after pipe is prepared in hot extrusion or be directly machined to QC;
Obtain metal grain refinement more by the BT14 seamless tube of above-mentioned 5 kinds of arbitrary productions of method, organize finer and close, thus the performance of its material is improved greatly.
The specification limit of titanium alloy BT14 seamless tube:
Pipe:
Or, square tube: the length of side 10 ~ 1500mm × length of side 10 ~ 1500mm × wall thickness 0.9 ~ 400mm (but each length of side must be greater than adjacent 2 wall thickness sums) × length 100 ~ 18000mm;
Or, special pipe:
special pipe large head external diameter must be greater than small head external diameter.
When preparing BT14 titanium alloy tube, first flawless optical wand blank is placed in process furnace (gas furnace, chamber type electric resistance furnace or producer gas generator) and carries out intensification heating; Be heated to temperature 800 DEG C ~ 1200 DEG C, soaking time=(heating ingot blank diameter mm/2) minute+(20 ~ 90) minute; Carry out come out of the stove hot piercing or hot extrusion, be rolled again after hot piercing or hot extrusion, the shaping rear machining of heat forged or machining, when rolling or heat forged deflection be (20% ~ 80%)/time, after hot piercing, finish to gauge and final forging temperature 500 DEG C ~ 1000 DEG C.
The thermal treatment of titanium alloy BT14 seamless tube and surface treatment: the finished product after hot piercing, hot extrusion, rolling, heat forged complete adopts oxidizing annealing or vacuum annealing, the annealing temperature of oxidizing annealing is 600 ~ 900 DEG C of insulations 1 ~ 8 hour; The annealing temperature of vacuum annealing is 600 ~ 900 DEG C of insulations 1 ~ 8 hour, and the finished product after annealing then will carry out pickling or alkali cleaning, pickling or alkali cleaning after washing again, obtains final product, or carries out machining acquisition final product again.
Tensile strength (Rm) in this product titanium alloy BT14 seamless tube performance can reach (600 ~ 1300) MPa after normal heat process and solid solution aging, unit elongation is at (6 ~ 25) %, in the two states that stress relieving and perfect recrystallization are annealed, its metallographic structure is even.
The present invention compared with prior art, has following beneficial effect:
1. intensity is high, corrosion-resistant: titanium alloy BT14 seamless tube intensity (Rm) (600 ~ 1300MPa) of the present invention 160 ~ 760MPa higher than TA4 pipe (540MPa), erosion resistance is also managed considerably beyond TA4.
2. reduce costs, shorten the production cycle: after the rolling of existing titanium alloy pipe production process per pass, all vacuum annealing will be carried out, and titanium alloy BT14 seamless tubular goods production technique of the present invention is the laggard row mill product of hot piercing or hot extrusion pipe or hot former processed finished products or mechanical workout finished product, so both reduces power consumption cost and also shortens the production cycle.
3. yield rate is high, quality is good, performance is excellent: it is high that BT14 seamless tube of the present invention draws hole pipe yield rate than bar, BT14 seamless tube utilizes hot piercing or hot extrusion pipe to be rolled finished product or hot former processed finished products or mechanical workout finished product, loss is little, yield rate is high, hole pipe drawn by bar then needs to draw out much to consider waste product to be worth doing, loss is large, yield rate is low, the quality and performance of hole pipe just bar drawn by bar, and bar draws the quality of hole pipe, performance far away from by quality, the performance of top legal system for BT14 seamless tube.
4. long service life: the congenital dense structure of BT14 seamless tube of the present invention, sheet material welded tube then commissure structural state and matrix inconsistent, easily cause fatigability intergranular cracking, so have BT14 seamless tube than sheet material welded tube long service life.
Embodiment
The present invention just can obtain new titanium alloy BT14 seamless tube by the working method of uniqueness with preparation complete processing, below by embodiment in detail the present invention is described in detail.
Adopt the cold rolling method for making of oxidizing annealing: step is carried out routinely, first raw material titanium sponge is used, vananum, molybdenum aluminium alloy, alumal carries out (Al (3 ~ 7) % by weight percentage for preparing burden, Mo (1 ~ 5), V (0.5 ~ 4) %, Cr (1 ~ 5) %, Mn (1 ~ 5) %, Ti surplus, raw material is mixed), extruding electrode, grid for welding, shove charge melting ingot casting, strip off the skin sampling analysis, bar (excellent base) is forged with ingot casting, the blanking of bar car light, with optical wand hot piercing or carry out mill product or heat forged machinery processed finished products or mechanical workout finished product after being hot extruded into pipe, alkali cleaning, pickling, washing, tack, annealing, sampling analysis, scale blanking.
Alkali cleaning proportioning in following embodiment, pickling proportioning 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:
By BT14 rod base
load chamber type electric resistance furnace intensification heating 920 DEG C, be incubated 60 minutes, hot piercing of coming out of the stove, the pipe after hot piercing is rolled by transferring on Rolling Production equipment, and rolling reduction is 30%, and finishing temperature 600 DEG C, hot rolling trimmed size is
oxidizing annealing 600 DEG C insulation 1 hour, alkali cleaning, pickling, washing, scale blanking, the actual measurement of its performance of sampling analysis are Rm960MPa, Rp0.2805MPa, A14%;
Titanium alloy BT14 seamless tube, alloy composition is by weight percentage: Al4.1%, Mo2.1%, V2.3%, Cr3.1%, Mn1.8%, Ti surplus.
Embodiment 2
Concrete preparation process is as follows:
By BT14 rod base
load gas furnace intensification heating 1150 DEG C, be incubated 12 hours, hot piercing of coming out of the stove, the pipe after hot piercing is rolled by transferring on hot rolling production unit, and rolling reduction is 70%, and finishing temperature 800 DEG C, hot rolling trimmed size is
oxidizing annealing 900 DEG C insulation 8 hours, alkali cleaning, pickling, washing, scale blanking, the actual measurement of its performance of sampling analysis are Rm1154MPa, Rp0.21050MPa, A10%.
Titanium alloy BT14 seamless tube, alloy composition is by weight percentage: Al3.9%, Mo3.2%, V2.6%, Cr3.7%, Mn1.9%, Ti surplus.
Embodiment 3
Concrete preparation process is as follows:
By BT14 rod base
load chamber type electric resistance furnace intensification heating 920 DEG C, be incubated 60 minutes, hot extrusion of coming out of the stove, the pipe after hot extrusion is rolled by transferring on Rolling Production equipment, and rolling reduction is 30%, and mill product specification is
oxidizing annealing 600 DEG C insulation 1 hour, alkali cleaning, pickling, washing, scale blanking, the actual measurement of its performance of sampling analysis are Rm990MPa, Rp0.2835MPa, A16%;
Titanium alloy BT14 seamless tube, alloy composition is by weight percentage: Al3.6%, Mo2.9%, V1.9%, Cr3.4%, Mn1.7%, Ti surplus.
Embodiment 4
Concrete preparation process is as follows:
By BT14 rod base
load gas furnace intensification heating 1150 DEG C, be incubated 12 hours, hot extrusion of coming out of the stove, the pipe after hot extrusion is rolled by transferring on hot rolling production unit, and rolling reduction is 70%, and mill product specification is
oxidizing annealing 900 DEG C insulation 8 hours, alkali cleaning, pickling, washing, scale blanking, the actual measurement of its performance of sampling analysis are Rm1124MPa, Rp0.21020MPa, A12%.
Titanium alloy BT14 seamless tube, alloy composition is by weight percentage: Al5.6%, Mo4.3%, V2.9%, Cr3.6%, Mn1%, Ti surplus.
Embodiment 5
Concrete preparation process is as follows:
By BT14 rod base
load gas furnace intensification heating 980 DEG C, be incubated 60 minutes, hot piercing of coming out of the stove, the pipe after hot piercing carries out heat forged by transferring on heat forged production unit, and heat forged deflection is 40%, final forging temperature 600 DEG C, and heat forged is machined to trimmed size and is
oxidizing annealing 700 DEG C insulation 1 hour, alkali cleaning, pickling, washing, scale blanking, the actual measurement of its performance of sampling analysis are Rm920MPa, Rp0.2780MPa, A14%;
Titanium alloy BT14 seamless tube, alloy composition is by weight percentage: Al3.0%, Mo1.5%, V3.8%, Cr1.6%, Mn1.0%, Ti surplus.
Embodiment 6
Concrete preparation process is as follows:
By BT14 rod base
load gas furnace intensification heating 1150 DEG C, be incubated 12 hours, hot piercing of coming out of the stove, the pipe after hot piercing carries out heat forged by transferring on heat forged production unit, and heat forged deflection is 80%, final forging temperature 860 DEG C, and hot former is machined to trimmed size and is
oxidizing annealing 920 DEG C insulation 8 hours, alkali cleaning, pickling, washing, scale blanking, the actual measurement of its performance of sampling analysis are Rm1150MPa, Rp0.21050MPa, A9%.
Titanium alloy BT14 seamless tube, alloy composition is by weight percentage: Al (3 ~ 7) %, Mo (1 ~ 5) %, V (0.5 ~ 4) %, Cr (1 ~ 5) %, Mn (1 ~ 5) %, Ti surplus.
Embodiment 7
Concrete preparation process is as follows:
By BT14 rod base
load gas furnace intensification heating 980 DEG C, be incubated 60 minutes, hot extrusion of coming out of the stove, the pipe after hot extrusion carries out heat forged by transferring on heat forged production unit, and heat forged deflection is 40%, final forging temperature 600 DEG C, and heat forged is machined to trimmed size and is
oxidizing annealing 700 DEG C insulation 1 hour, alkali cleaning, pickling, washing, scale blanking, the actual measurement of its performance of sampling analysis are Rm980MPa, Rp0.2820MPa, A16%;
Titanium alloy BT14 seamless tube, alloy composition is by weight percentage: Al4.6%, Mo3.7%, V2.6%, Cr3.9%, Mn1.8%, Ti surplus.
Embodiment 8
Concrete preparation process is as follows:
By BT14 rod base
load gas furnace intensification heating 1150 DEG C, be incubated 12 hours, hot extrusion of coming out of the stove, the pipe after hot extrusion carries out heat forged by transferring on heat forged production unit, and heat forged deflection is 80%, final forging temperature 860 DEG C, and hot former is machined to trimmed size and is
oxidizing annealing 920 DEG C insulation 8 hours, alkali cleaning, pickling, washing, scale blanking, the actual measurement of its performance of sampling analysis are Rm1180MPa, Rp0.21070MPa, A11%;
Titanium alloy BT14 seamless tube, alloy composition is by weight percentage: Al6.3%, Mo4.9%, V3.9%, Cr4.6%, Mn1.5%, Ti surplus.
Embodiment 9
Concrete preparation process is as follows:
By BT14 rod base
load chamber type electric resistance furnace intensification heating 960 DEG C, be incubated 60 minutes, hot piercing of coming out of the stove, after the pipe cooling after hot piercing, machining trimmed size is
oxidizing annealing 600 DEG C insulation 1 hour, alkali cleaning, pickling, washing, scale blanking, the actual measurement of its performance of sampling analysis are Rm920MPa, Rp0.2750MPa, A13%;
Titanium alloy BT14 seamless tube, alloy composition is by weight percentage: Al3.6%, Mo1.5%, V1.2%, Cr3.5%, Mn4.1%, Ti surplus.
Embodiment 10
Concrete preparation process is as follows:
By BT14 rod base
load gas furnace intensification heating 1150 DEG C, be incubated 12 hours, hot piercing of coming out of the stove, after the pipe cooling after hot piercing, machining trimmed size is
oxidizing annealing 900 DEG C insulation 8 hours, alkali cleaning, pickling, washing, scale blanking, the actual measurement of its performance of sampling analysis are Rm1100MPa, Rp0.2950MPa, A11%.
Titanium alloy BT14 seamless tube, alloy composition is by weight percentage: Al3.9%, Mo2.1%, V2.7%, Cr2.8%, Mn4.9%, Ti surplus.
Embodiment 11
Concrete preparation process is as follows:
By BT14 rod base
load chamber type electric resistance furnace intensification heating 960 DEG C, be incubated 60 minutes, hot extrusion of coming out of the stove, after the pipe cooling after hot extrusion, machining trimmed size is
oxidizing annealing 600 DEG C insulation 1 hour, alkali cleaning, pickling, washing, scale blanking, the actual measurement of its performance of sampling analysis are Rm960MPa, Rp0.2780MPa, A16%;
Titanium alloy BT14 seamless tube, alloy composition is by weight percentage: Al4.6%, Mo2.9%, V2.1%, Cr2.8%, Mn1.2%, Ti surplus.
Embodiment 12
Concrete preparation process is as follows:
By BT14 rod base
load gas furnace intensification heating 1150 DEG C, be incubated 12 hours, hot extrusion of coming out of the stove, after the pipe cooling after hot extrusion, machining trimmed size is
oxidizing annealing 900 DEG C insulation 8 hours, alkali cleaning, pickling, washing, scale blanking, the actual measurement of its performance of sampling analysis are Rm1050MPa, Rp0.2900MPa, A13%.
Titanium alloy BT14 seamless tube, alloy composition is by weight percentage: Al4.1%, Mo3.2%, V2.6%, Cr3.2%, Mn1.1%, Ti surplus.
By weight percentage in above-mentioned alloy composition: Fe≤0.3%, C≤0.08%, N≤0.05%, H≤0.015%, O≤0.2%.
Claims (7)
1. a titanium alloy BT14 seamless tube, is characterized in that:
Alloy composition is by weight percentage: Al (3 ~ 7) %, Mo (1 ~ 5) %, V (0.5 ~ 4) %, Cr (1 ~ 5) %, Mn (1 ~ 5) %, and surplus is titanium.
2., according to titanium alloy BT14 seamless tube according to claim 1, it is characterized in that:
Alloy composition is by weight percentage: Al (3 ~ 7) %, Mo (1 ~ 5) %, V (0.5 ~ 4) %, Cr (1 ~ 5) %, Mn (1 ~ 5) %, Fe≤0.3%, C≤0.08%, N≤0.05%, H≤0.015%, O≤0.2%; Surplus is titanium.
3. according to the titanium alloy BT14 seamless tube described in claim 1 or 2, it is characterized in that: the specification limit of titanium alloy BT14 seamless tube:
Pipe:
Or, square tube: the length of side 10 ~ 1500mm × length of side 10 ~ 1500mm × wall thickness 0.9 ~ 400mm (but each length of side must be greater than adjacent 2 wall thickness sums) × length 100 ~ 18000mm;
Or, special pipe:
special pipe large head external diameter must be greater than small head external diameter.
4. a preparation method for the arbitrary described titanium alloy BT14 seamless tube of claim 1,2 or 3, is characterized in that:
Alloy raw material consists of by weight percentage: Al (3 ~ 7) %, Mo (1 ~ 5) %, V (0.5 ~ 4) %, Cr (1 ~ 5) %, Mn (1 ~ 5) %, Ti surplus;
According to a conventional method above-mentioned raw materials is processed into excellent blank;
Prepare pipe by the mode of hot extrusion or hot piercing, production tube preparation method is one of following 5 kinds,
The first is rolled after hot piercing;
The second be carry out after hot piercing heat forged shaping after carry out the production tube that machining obtains;
The third directly carries out the production tube that machining obtains after hot piercing;
4th kind is carry out mill product pipe after pipe is prepared in hot extrusion;
5th kind is carry out the shaping rear machining of heat forged after pipe is prepared in hot extrusion or be directly machined to QC;
Obtain metal grain refinement more by the BT14 seamless tube of above-mentioned 5 kinds of arbitrary productions of method, organize finer and close, thus the performance of its material is improved greatly.
5. according to preparation method according to claim 4, it is characterized in that: the specification limit of titanium alloy BT14 seamless tube:
Pipe:
Or, square tube: the length of side 10 ~ 1500mm × length of side 10 ~ 1500mm × wall thickness 0.9 ~ 400mm (but each length of side must be greater than adjacent 2 wall thickness sums) × length 100 ~ 18000mm;
Or, special pipe:
special pipe large head external diameter must be greater than small head external diameter.
6., according to preparation method according to claim 5, it is characterized in that:
When preparing BT14 titanium alloy tube, first flawless optical wand blank is placed in process furnace (gas furnace, chamber type electric resistance furnace or producer gas generator) and carries out intensification heating; Be heated to temperature 800 DEG C ~ 1200 DEG C, soaking time=(heating ingot blank diameter mm/2) minute+(20 ~ 90) minute; Carry out come out of the stove hot piercing or hot extrusion, be rolled again after hot piercing or hot extrusion, the shaping rear machining of heat forged or machining, when rolling or heat forged deflection be (20% ~ 80%)/time, after hot piercing, finish to gauge and final forging temperature 500 DEG C ~ 1000 DEG C.
7. according to the arbitrary described preparation method of claim 4,5 or 6, it is characterized in that: the thermal treatment of titanium alloy BT14 seamless tube and surface treatment: the finished product after hot piercing, hot extrusion, rolling, heat forged complete adopts oxidizing annealing or vacuum annealing, the annealing temperature of oxidizing annealing is 600 ~ 900 DEG C of insulations 1 ~ 8 hour; The annealing temperature of vacuum annealing is 600 ~ 900 DEG C of insulations 1 ~ 8 hour, and the finished product after annealing then will carry out pickling or alkali cleaning, pickling or alkali cleaning after washing again, obtains final product, or carries out machining acquisition final product again.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115786767A (en) * | 2021-09-10 | 2023-03-14 | 中国石油天然气集团有限公司 | High-toughness titanium alloy oil pipe and heat treatment method thereof |
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|---|---|---|---|---|
| JPH10306335A (en) * | 1997-04-30 | 1998-11-17 | Nkk Corp | Alpha plus beta titanium alloy bar and wire rod, and its production |
| CN101824564A (en) * | 2009-06-03 | 2010-09-08 | 东港市东方高新金属材料有限公司 | Titanium alloy TC4 cold-rolled tube and production method thereof |
| CN103146956A (en) * | 2013-03-26 | 2013-06-12 | 武汉武船机电设备有限责任公司 | Titanium alloy pipe and manufacturing method |
-
2014
- 2014-08-11 CN CN201410393256.3A patent/CN105369061A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10306335A (en) * | 1997-04-30 | 1998-11-17 | Nkk Corp | Alpha plus beta titanium alloy bar and wire rod, and its production |
| CN101824564A (en) * | 2009-06-03 | 2010-09-08 | 东港市东方高新金属材料有限公司 | Titanium alloy TC4 cold-rolled tube and production method thereof |
| CN103146956A (en) * | 2013-03-26 | 2013-06-12 | 武汉武船机电设备有限责任公司 | Titanium alloy pipe and manufacturing method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115786767A (en) * | 2021-09-10 | 2023-03-14 | 中国石油天然气集团有限公司 | High-toughness titanium alloy oil pipe and heat treatment method thereof |
| CN115786767B (en) * | 2021-09-10 | 2024-03-15 | 中国石油天然气集团有限公司 | High-toughness titanium alloy oil pipe and heat treatment method thereof |
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