CN107513638A - A kind of preparation method of high-intensity titanium alloy pipe - Google Patents
A kind of preparation method of high-intensity titanium alloy pipe Download PDFInfo
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- CN107513638A CN107513638A CN201710819405.1A CN201710819405A CN107513638A CN 107513638 A CN107513638 A CN 107513638A CN 201710819405 A CN201710819405 A CN 201710819405A CN 107513638 A CN107513638 A CN 107513638A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
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Abstract
The present invention relates to a kind of preparation method of high-intensity titanium alloy pipe, the present invention uses new alloy formula, by the aluminium for adding special component, vanadium, the alloying elements such as iron, titanium is set fully to be strengthened, realize the Proper Match of intensity index and moulding index, and then high-strength titanium alloy thin-walled tube stock is produced using the method for cold-rolling deformation, the process for specifically preparing cold rolling using alloy electrode vacuum melting pipe is prepared, the new titanium alloy tubing intensity of Ti 43 produced is high, it is in light weight, the wall thickness of tubing can also be further reduced when being commonly used to bicycle, play the purpose of bicycle loss of weight.The new alloys of Ti 43 of the present invention make the intensity index of titanium tube and plasticity index reach preferable matching by adding certain content alloy element in pure titanium, the intensity of tubing improves 30% than TA18 tubing, and can use the method production bicycle use thin-wall titanium alloy pipe of cold rolling.
Description
Technical field
The invention belongs to bicycle use titanium alloy field, and in particular to a kind of preparation method of high-intensity titanium alloy pipe.
Background technology
The development of bicycle and the development of material there is inseparable relation, various new materials to continue to bring out to from
Driving creates new opportunity to develop.At present bicycle via traditional walking-replacing tool to high intensity, lightweight, personalization,
Functionalization direction is developed, compared with the past, and people more pursue the comfortableness of bicycle and experience of preferably riding.At present voluntarily
The material of vehicle frame has steel, aluminium alloy, carbon fiber, titanium etc..
Titanium alloy is widely used in the fields such as Aero-Space, petrochemical industry, ocean engineering, medicine equipment, and titanium alloy protrudes
The characteristics of be in light weight, intensity is high, and elasticity is good, and shock resistance, fatigue behaviour is good, corrosion-resistant Never-rusty.It is public in the world at present
All kinds of matches of production recognized and leisure high-grade bicycle is most advanced, optimal material.Bicycle particularly racing car requires weight
Amount is light, good rigidity and impact property are good.It is in light weight to improve speed, and reduce physical demands when long range is moved；Just
The good cycle frame of property is advantageous to the conversion of driving force, and improves maneuvering performance；The good cycle frame of impact absorbency can
Preferably to slow down the impact from road surface, so as to reduce the fatigue of driver.The density of titanium alloy typically in 4.5g/cm3 or so,
Only the 60% of steel, close to the intensity of ordinary steel, some high strength titanium alloys have exceeded many structural alloy steels for the intensity of pure titanium
Intensity.Therefore the specific strength (strength/density) of titanium alloy be much larger than other structural metallic materials, can make unit strength height,
Good, the light parts and components of rigidity.Titanium alloy works in the air and Seawater of humidity, and its corrosion stability is much better than stainless steel；
It is especially strong to the resistance of spot corrosion, acid etching, stress corrosion；Have to alkali, chloride, organic article of chlorine, nitric acid, sulfuric acid etc. excellent
Resistance to corrosion.
It is mainly at present TA18, nominal composition Ti-3Al-2.5V applied to the material of titanium voluntarily.The alloy is low-alloy
Change strength titanium alloy in nearly α types, tensile strength 620Mpa, yield limit 515Mpa, elongation percentage 15%, the alloy not only has
Have good room temperature, mechanical behavior under high temperature and a corrosion resisting property, and with excellent hot and cold processing technology plasticity, mouldability and
Welding performance, it is the ideal material for making tubing.Its pure titanium of intensity ratio is higher by 20%-50% under room and high temperature, though the alloy
Right intensity is high not as good as TC4 alloys, but because it has excellent cold-forming property, thus be widely used.TA18 titaniums close
Golden seamless pipe is applied to the pipe-line system such as aircraft and engine hydraulic and fuel oil, in various military, civilian a variety of aircrafts and boat
Its application, has obvious weight loss effect.
The development of titanium bicycle proposes higher requirement to titanium alloy, it is therefore desirable to researches and develops new titanium alloy to meet to subtract
The active demand of weight, in order to further mitigate the weight of bicycle, it is necessary to the higher titanium alloy of mining inetesity rank.TC4 is
A kind of currently used titanium alloy, but its cold rolling poor-performing, extremely difficult using common cold production thin-wall pipes, titanium is certainly
The performance boost of driving is by severely restricts, therefore it is to be badly in need of solving to develop novel high-strength/tenacity bicycle use titanium alloy material
Problem.
The content of the invention
In order to solve the above-mentioned problems in the prior art, the invention provides a kind of high strength titanium alloy, a kind of system
Method, a kind of preparation method of high-intensity titanium alloy pipe of standby high strength titanium alloy.The technical problem to be solved in the present invention is led to
Cross following technical scheme realization：
A kind of high strength titanium alloy, the percentage by weight of the alloy each component are：Aluminium 3.6%~4.4%, vanadium 2.6%~
3.4%, iron 0.5%~0.8%, remaining is titanium and inevitable impurity.
A kind of above-mentioned high strength titanium alloy, the percentage by weight of the titanium is 90.5%~94.5%, the impurity
Percentage by weight≤0.665%.
A kind of method for preparing above-mentioned high strength titanium alloy, comprises the following steps：
(1) in titanium sponge add parts by weight be 4%~5% AlV65 and parts by weight be 2%~3% pure Al and
0.5%~0.7% pure Fe, batch mixing is carried out in mixed material distributing machine；
(2) batch mixing in step (1) is pressed into electrode block on hydraulic press, then consutrode is made in electrode block；
(3) vacuum consumable electrode arc furnace is used, melting in the environment of being 1700 DEG C -1800 DEG C in smelting temperature, is obtained once
Ingot casting；
(4) repeat step using an ingot casting as consutrode, in the environment of smelting temperature is 1700 DEG C -1800 DEG C
(3) melting is carried out, obtains titanium alloy ingot.
A kind of above-mentioned method for preparing high strength titanium alloy, in addition to step (5), the titanium that obtains step (4)
Alloy ingot surface car light simultaneously cuts off ingot butt and rising head.
A kind of preparation method of high-intensity titanium alloy pipe, comprises the following steps：
Step 1: above-mentioned titanium alloy ingot is forged into bar stock, and the bar stock is processed into optical wand；
Step 2: the holes drilled through on the outer wall of optical wand；
Step 3: the optical wand that step 2 is obtained is cleaned, dried；
Step 4: the outer wall in the optical wand, cladding red copper layer on the inwall of endoporus；
Method for coating is：Cylinder and body are first welded into using copper plate, body filled in the endoporus of optical wand, by cylinder
It is sleeved on optical wand；Then using copper plate be made with optical wand diameter identical bottom plate, and be coated on optical wand up and down two end
Face；
Step 5: the optical wand for coating copper plate is heated into 50min- in the electric furnace that heating-up temperature is 900 DEG C -1000 DEG C
120min, hot extrusion is carried out on the extruder that extrusion speed is 80mm/s-130mm/s, obtains titanium alloy pipe；
Step 6: using the copper sheet of titanium alloy pipe described in acid wash removal step five, titanium alloy pipe is obtained.
A kind of preparation method of above-mentioned high-intensity titanium alloy pipe, in addition to Step 7: the titanium described in step 6 is closed
Golden cold reduction of tubes shaping.
A kind of preparation method of above-mentioned high-intensity titanium alloy pipe, the step 7 are specially：
(71) breaking down is carried out to the titanium alloy pipe using the cold mills of LG two, obtains breaking down tubing；
(72) pickling 10min-30min is carried out to the breaking down tubing, then puts into the vacuum that temperature is 500 DEG C -800 DEG C and move back
Anneal 60min-90min in stove, to remove the greasy dirt of tube surfaces and oxide skin；
(73) the breaking down tubing repeat step (71) after annealing, (72) are carried out with the rolling of pony-roughing pass and finished product.
A kind of preparation method of above-mentioned high-intensity titanium alloy pipe, the composition of pickle is in the step (72)：
35%-45% nitric acid, 3%-7% hydrofluoric acid, 48%-62% water.
A kind of preparation method of above-mentioned high-intensity titanium alloy pipe, it is the step of acid wash in the step 6：By band
The titanium alloy pipe for having copper sheet is put into pickling 15min-30min in pickle, to remove the copper in titanium alloy pipe, and using clear
Water is rinsed well；
Wherein, pickle by 25%-35% sulfuric acid, 35%-45% nitric acid, 4%-6% hydrofluoric acid and 14%-
36% water composition.
A kind of preparation method of above-mentioned high-intensity titanium alloy pipe, the thickness of copper plate is 0.8- in the step 5
1.0mm。
Beneficial effects of the present invention：
The Ti-43 new alloys of the present invention make the intensity index of titanium tube by adding certain content alloy element in pure titanium
Reach preferable matching with plasticity index, the intensity of tubing improves 30% than TA18 tubing, and can use the side of cold rolling
Method produces bicycle use thin-wall titanium alloy pipe.
Embodiment
For the technological means and effect that the present invention reaches predetermined purpose and taken is expanded on further, following examples are to this hair
Bright embodiment, architectural feature and its effect, describe in detail as follows.
Embodiment 1：
Titanium alloy is a kind of metal material of the difficult deformation of comparison, and the core technology of Titanium Alloy Design is the selection of alloying element
And Proper Match, to reach the purpose of Strengthening and Toughening.The conventional alloy element of titanium alloy has kind more than 10, except conventional Al, V,
Outside Mo, also Cr, Mn, Fe, Cu, Sn, Zr, W etc., the element for improving phase transition temperature have aluminium, carbon, oxygen and nitrogen for α stable elements
Deng.Wherein aluminium is titanium alloy main alloy element, it to improve alloy normal temperature and elevated temperature strength, reduce proportion, increase elasticity
Modulus has positive effect.The element for reducing phase transition temperature has molybdenum, niobium, vanadium, chromium, manganese, copper, iron, silicon etc. for beta stable element.To phase
It is neutral element that temperature, which influences little element, there is zirconium, tin etc..Oxygen, nitrogen, carbon and hydrogen are the major impurities of titanium alloy.Oxygen and
Nitrogen has larger solubility in α phases, has significant reinforcing effect to titanium alloy, but decline plasticity.Generally oxygen in regulation titanium
Content with nitrogen is respectively in 0.15~0.2% and less than 0.04~0.05%.Hydrogen solubility very little in α phases, it is molten in titanium alloy
Hydride can be produced by solving excessive hydrogen, alloy is become fragile.Hydrogen content control is below 0.015% in usual titanium alloy.Hydrogen is in titanium
In dissolving be reversible, can be removed with vacuum annealing.
Therefore, present embodiment discloses a kind of composition of novel high-strength alloy, the weight of the alloy each component for the present embodiment
Measuring percentage is：Aluminium 3.8%, vanadium 3.4%, iron 0.8%, titanium 91.5%, impurity 0.5%.
A kind of method for preparing above-mentioned high-strength alloy, comprises the following steps：
(1) the pure Al's and 0.6% that the AlV65 and parts by weight that addition parts by weight are 4% in titanium sponge are 3% is pure
Fe, batch mixing is carried out in mixed material distributing machine；
(2) batch mixing in step (1) is pressed into electrode block on hydraulic press, then consutrode is made in electrode block；
(3) vacuum consumable electrode arc furnace is used, melting in the environment of being 1800 DEG C in smelting temperature, obtains an ingot casting；
(4) using an ingot casting as consutrode, in the environment of smelting temperature is 1700 DEG C, repeat step (3) is melted
Refining, obtains titanium alloy ingot.
By the measure of the tensile strength of titanium alloy ingot, yield limit and elongation percentage on cupping machine according to GB/T228-
2002《Metal material stretching test room temperature test method》Carry out, measure tensile strength >=810Mpa of this alloy, yield limit
>=680Mpa, elongation percentage >=14%.
Embodiment 2：
Present embodiment discloses a kind of composition of high-strength alloy, the percentage by weight of the alloy each component is：Aluminium
4.4%, vanadium 2.6%, iron 0.55%, titanium 91.8%, impurity 0.65%.
A kind of method for preparing above-mentioned high-strength alloy, comprises the following steps：
(1) the pure Al's and 0.7% that the AlV65 and parts by weight that addition parts by weight are 4.5% in titanium sponge are 2% is pure
Fe, batch mixing is carried out in mixed material distributing machine；
(2) batch mixing in step (1) is pressed into electrode block on hydraulic press, then consutrode is made in electrode block；
(3) vacuum consumable electrode arc furnace is used, melting in the environment of being 1700 DEG C in smelting temperature, obtains an ingot casting；
(4) using an ingot casting as consutrode, in the environment of smelting temperature is 1750 DEG C, repeat step (3) is melted
Refining, obtains titanium alloy ingot；
(5) by titanium alloy ingot surface car light that step (4) obtains and ingot butt and rising head are cut off.
By the measure of the tensile strength of titanium alloy ingot, yield limit and elongation percentage on cupping machine according to GB/T228-
2002《Metal material stretching test room temperature test method》Carry out, measure tensile strength >=810Mpa of this alloy, yield limit
>=680Mpa, elongation percentage >=14%.
The present embodiment uses the alloying element such as new alloy formula, aluminium, vanadium, iron by adding special component, obtains titanium
To the abundant Proper Match strengthened, realize intensity index and moulding index, and then the method for cold-rolling deformation can be used to produce
High-strength titanium alloy thin-walled tube stock.Intensity of the Ti-43 new titanium alloy tubing of the present embodiment due to improving material, for voluntarily
The wall thickness of tubing can be further reduced during car, plays the purpose of bicycle loss of weight.In addition a kind of Ti-43 titaniums of the present embodiment close
Golden tubing can also be used for the related occasion such as aerospace field hydraulic plumbing system and oil, chemical industry.
Embodiment 3：
Present embodiment discloses a kind of composition of high-strength alloy, the percentage by weight of the alloy each component is：Aluminium 3%,
Vanadium 3%, iron 0.7%, titanium 93.2%, impurity 0.1%.
A kind of method for preparing above-mentioned high-strength alloy, comprises the following steps：
(1) the pure Al's and 0.5% that the AlV65 and parts by weight that addition parts by weight are 5% in titanium sponge are 2.5% is pure
Fe, batch mixing is carried out in mixed material distributing machine；
(2) batch mixing in step (1) is pressed into electrode block on hydraulic press, then consutrode is made in electrode block；
(3) vacuum consumable electrode arc furnace is used, melting in the environment of being 1750 DEG C in smelting temperature, obtains an ingot casting；
(4) using an ingot casting as consutrode, in the environment of smelting temperature is 1800 DEG C, repeat step (3) is melted
Refining, obtains titanium alloy ingot；
(5) by titanium alloy ingot surface car light that step (4) obtains and ingot butt and rising head are cut off.
Embodiment 4：
A kind of high strength titanium alloy ingot of 1~embodiment of Application Example 3, the method for preparing high-intensity titanium alloy pipe,
Comprise the following steps：
Step 1: titanium alloy ingot is forged into the bar stocks of Φ 150, and the optical wand with lathe process into Φ 145；
Step 2: in optical wand centre drill Φ 32 through hole；
Step 3: by Φ 145 hollow bar cleaning, dry；
Step 4: the outer wall in optical wand, cladding red copper layer on the inwall of endoporus；
Method for coating is：Cylinder and body are first welded into using 0.8mm copper plate, body is filled in the endoporus of optical wand
In, by barrel jacket on optical wand；Then using copper plate be made with optical wand diameter identical bottom plate, and be coated on the upper of optical wand
Lower two end faces；
Step 5: the optical wand for the copper plate for coating 0.8 is heated into 50min in the electric furnace that heating-up temperature is 1000 DEG C,
Extrusion speed is to carry out hot extrusion on 100mm/s extruder, obtains Φ 46 × 6 titanium alloy pipe；
Step 6: using the copper sheet of the titanium alloy pipe of acid wash removal step five, titanium alloy pipe is obtained；Copper sheet will be carried
Titanium alloy pipe be put into pickling 30min in pickle, to remove the copper in titanium alloy pipe, and rinsed well using clear water；
Wherein, pickle is made up of 30% sulfuric acid, 40% nitric acid, 5% hydrofluoric acid and 35% water；
Step 7: the titanium alloy pipe cold rolling of step 6 is molded；
Wherein：Step 7 is specially：
(71) breaking down is carried out to titanium alloy pipe using the cold mills of LG two, obtains breaking down tubing；
(72) pickling 20min is carried out to breaking down tubing, then puts into the vacuum annealing furnace that temperature is 800 DEG C the 60min that anneals,
To remove the greasy dirt of tube surfaces and oxide skin, the composition of pickle is：41 nitric acid, 7% hydrofluoric acid, 62% water；
(73) the breaking down tubing repeat step (71) after annealing, (72) are carried out with the rolling of pony-roughing pass and finished product.
Embodiment 5：
A kind of high strength titanium alloy ingot of 1~embodiment of Application Example 3, the method for preparing high-intensity titanium alloy pipe,
Comprise the following steps：
Step 1: titanium alloy ingot is forged into the bar stocks of Φ 150, and the optical wand with lathe process into Φ 145；
Step 2: in optical wand centre drill Φ 32 through hole；
Step 3: by Φ 145 hollow bar cleaning, dry；
Step 4: the outer wall in optical wand, cladding red copper layer on the inwall of endoporus；
Method for coating is：Cylinder and body are first welded into using 1.0mm copper plate, body is filled in the endoporus of optical wand
In, by barrel jacket on optical wand；Then using copper plate be made with optical wand diameter identical bottom plate, and be coated on the upper of optical wand
Lower two end faces；
Step 5: the optical wand for the copper plate for coating 1.0mm is heated into 75min in the electric furnace that heating-up temperature is 900 DEG C,
Extrusion speed is to carry out hot extrusion on 130mm/s extruder, obtains Φ 46 × 6 titanium alloy pipe；
Step 6: using the copper sheet of the titanium alloy pipe of acid wash removal step five, titanium alloy pipe is obtained；Copper sheet will be carried
Titanium alloy pipe be put into pickling 15min in pickle, to remove the copper in titanium alloy pipe, and rinsed well using clear water；
Wherein, pickle is made up of 25% sulfuric acid, 45% nitric acid, 6% hydrofluoric acid and 24% water；
Step 7: the titanium alloy pipe cold rolling of step 6 is molded；
Wherein：Step 7 is specially：
(71) breaking down is carried out to titanium alloy pipe using the cold mills of LG two, obtains breaking down tubing；
(72) pickling 30min is carried out to breaking down tubing, then puts into the vacuum annealing furnace that temperature is 500 DEG C the 90min that anneals,
To remove the greasy dirt of tube surfaces and oxide skin, the composition of pickle is：45 nitric acid, 3% hydrofluoric acid, 52% water；
(73) the breaking down tubing repeat step (71) after annealing, (72) are carried out with the rolling of pony-roughing pass and finished product.
Embodiment 6：
A kind of high strength titanium alloy ingot of 1~embodiment of Application Example 3, the method for preparing high-intensity titanium alloy pipe,
Comprise the following steps：
Step 1: titanium alloy ingot is forged into the bar stocks of Φ 150, and the optical wand with lathe process into Φ 145；
Step 2: in optical wand centre drill Φ 32 through hole；
Step 3: by Φ 145 hollow bar cleaning, dry；
Step 4: the outer wall in optical wand, cladding red copper layer on the inwall of endoporus；
Method for coating is：Cylinder and body are first welded into using 0.9mm copper plate, body is filled in the endoporus of optical wand
In, by barrel jacket on optical wand；Then using copper plate be made with optical wand diameter identical bottom plate, and be coated on the upper of optical wand
Lower two end faces；
Step 5: the optical wand for the copper plate for coating 0.9mm is heated into 120min in the electric furnace that heating-up temperature is 950 DEG C,
Hot extrusion is carried out on the extruder that extrusion speed is 80mm/s, obtains Φ 46 × 6 titanium alloy pipe；
Step 6: using the copper sheet of the titanium alloy pipe of acid wash removal step five, titanium alloy pipe is obtained；Copper sheet will be carried
Titanium alloy pipe be put into pickling 23min in pickle, to remove the copper in titanium alloy pipe, and rinsed well using clear water；
Wherein, pickle is made up of 35% sulfuric acid, 35% nitric acid, 4% hydrofluoric acid and 26% water；
Step 7: the titanium alloy pipe cold rolling of step 6 is molded；
Wherein：Step 7 is specially：
(71) breaking down is carried out to titanium alloy pipe using the cold mills of LG two, obtains breaking down tubing；
(72) pickling 10min is carried out to breaking down tubing, then puts into the vacuum annealing furnace that temperature is 650 DEG C the 75min that anneals,
To remove the greasy dirt of tube surfaces and oxide skin, the composition of pickle is：30 nitric acid, 7% hydrofluoric acid, 63% water；
(73) the breaking down tubing repeat step (71) after annealing, (72) are carried out with the rolling of pony-roughing pass and finished product.
Embodiment 7：
Present embodiment discloses the method that one kind prepares the Ti43 tubing that specification is Ф 35 × 0.8：
First by the titanium sponge that base stock is 1 grade, embodiment 1~implementation is pressed according to Ti-4Al-3V-0.6Fe nominal compositions
The quantity of the AlV65 and AlFe20 intermediate alloys of example 3, it is added in titanium sponge and be sufficiently mixed uniformly, by what is mixed
Titanium sponge is pressed into the electrode block of melting on special pressure machine, and it is whole that single electrode block is welded into one in vacuum welding equipment
Root electrode.
The alloy electrode prepared is loaded into vacuum consumable electrode arc furnace again and carries out melting, obtains an ingot casting.Ingot casting appearance
Face strips off the skin to remove in fusion process by lathe forms impurity, and remelting is then carried out on vacuum consumable electrode arc furnace obtains secondary casting
Ingot, by stripping off the skin, detecting a flaw, the process such as remove feeders and melting defect, chemical analysis, obtain finished product ingot casting.
Then finished product ingot casting is forged and is processed into Ф 145 and extrudes bar stock, bores the centre bores of Φ 38.With sheet copper by hollow bar
Outer surface, upper and lower end face, the position such as endoporus it is fully wrapped around, copper sheet and surface of metal titanium fitting are close.Then on extruder
The pipes of Ф 45 × 4 are squeezed into, qualified pipe is obtained through processes such as past copper sheet pickling, inspections.
Five passes are finally carried out using LD60 milling trains, passage deformation is followed successively by Φ 45 × 4--, 43 × 3.3-- of Φ Φ 40
× 2.3-- Φ 38 × 1.6--, 36 × 1.1-- of Φ Φ 35 × 0.8, pass deformation 20%-34%, progress acid between every time
Wash and anneal.
Embodiment 8：
Present embodiment discloses one kind to prepare the method that specification is Ф 16 × 0.8Ti43 tubing：
It is first 0 grade of titanium sponge by base stock, 1~embodiment of embodiment 3 is pressed according to Ti-4Al-3V-0.6Fe nominal compositions
AlV65 and AlFe20 intermediate alloys quantity, be added in titanium sponge and be sufficiently mixed uniformly, the sponge that will be mixed
Titanium is pressed into the electrode block of melting on special pressure machine, and single electrode block is welded into one whole electricity in vacuum welding equipment
Pole.
The alloy electrode prepared is loaded into vacuum consumable electrode arc furnace again and carries out melting, obtains an ingot casting.Ingot casting appearance
Face strips off the skin to remove in fusion process by lathe forms impurity, and remelting is then carried out on vacuum consumable electrode arc furnace obtains secondary casting
Ingot, by stripping off the skin, detecting a flaw, the process such as remove feeders and melting defect, chemical analysis, obtain finished product ingot casting.
Then finished product ingot casting is forged and is processed into Ф 145 and extrudes bar stock, bores the centre bores of Φ 32.With sheet copper by hollow bar
Outer surface, upper and lower end face, the position such as endoporus it is fully wrapped around, copper sheet and surface of metal titanium fitting are close.Then on extruder
The pipes of Ф 45 × 5.2 are squeezed into, qualified pipe is obtained through processes such as past copper sheet pickling, inspections.
LG60, LD60, LD30 milling train are finally used, carries out 7 passes, passage deformation is followed successively by 45 × 5.2-- of Ф Ф
35 × 4.5-- Ф 28 × 3.7-- Ф 25 × 2.7-- Ф 22 × 2-- Ф 19 × 1.5-Ф, 17 × 1.1-- Ф 16 × 0.8, passage
Deflection is 31%-35%, progress pickling and annealing between every time.
Embodiment 9：
A kind of high intensity can cold rolling shaping bicycle use titanium alloy pipe, the nominal composition of titanium alloy is Ti-4Al-3V-
0.6Fe, using above-mentioned specific composition proportion, obtain the titanium alloy material of excellent combination property.The tensile strength of this alloy
>=810Mpa, yield limit >=680Mpa, elongation percentage >=14%.
The present embodiment also disclose a kind of high intensity can cold rolling shaping bicycle use titanium alloy pipe, the ingot system of titanium alloy
Standby process steps include：
(1) Al, V and Fe are added in titanium sponge (0 grade or 1 grade) according to Ti-4Al-3V-0.6Fe nominal compositions, wherein
Al and V is added in the form of AlV65 intermediate alloys, and Fe is added in the form of AlFe20 intermediate alloys, according to the ratio of alloying element
Example prepares raw material in mixed material distributing machine；
(2) using the electrode block that the raw material prepared is pressed into vacuum melting on hydraulic press, using vacuum plasma welding
Electrode block is welded into consutrode by case；
(3) with vacuum consumable electrode arc furnace melting 2 times；
(4) by the outer surface car light of titanium alloy ingot；
(5) ingot butt and rising head are cut off.
The present embodiment also discloses a kind of high strength bicycle titanium alloy pipe, the preparation method of pipe rod for forging and
Extruding, titanium ingot is first forged into Φ 150 bar stock, then the optical wand with lathe process into Φ 145, it is logical in optical wand centre drill Φ 32
Hole.
The preparation method of extrusion tube blank pipe is：(1) hollow bars of Φ 145 are cleaned up.(2) with red copper by hollow bar
The position such as outer surface, upper and lower end face, endoporus tight.(3) by the hollow bar electricity consumption stove heat of cladding, then extruder is enterprising
Row hot extrusion, Φ 46 × 6 pipe is made.(4) copper sheet being coated on pipe is removed using the method for pickling.
The cold rolling preparation method of finished product tubing is：(1) split rolling method is carried out using two cold mills.(2) it is cold using three rollers
Milling train carries out the rolling of pony-roughing pass and finished product, and every time deflection is 25-35%.(3) between every time carry out pickling and
Vacuum annealing.
The Ti-43 new alloys of the present invention make the intensity index of titanium tube by adding certain content alloy element in pure titanium
Reach preferable matching with plasticity index, the intensity of tubing improves 30% than TA18 tubing, and can use the side of cold rolling
Method produces bicycle use thin-wall titanium alloy pipe.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to is assert
The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of not departing from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention's
Protection domain.
Claims (10)
1. a kind of preparation method of high-intensity titanium alloy pipe, comprises the following steps：
Step 1: titanium alloy ingot is forged into bar stock, and the bar stock is processed into optical wand；
Step 2: the holes drilled through on the outer wall of optical wand；
Step 3: the optical wand that step 2 is obtained is cleaned, dried；
Step 4: the outer wall in the optical wand, cladding red copper layer on the inwall of endoporus；
Method for coating is：Cylinder and body are first welded into using copper plate, body is filled in the endoporus of optical wand, cylinder is set with
On optical wand；Then using copper plate be made with optical wand diameter identical bottom plate, and be coated on two end faces up and down of optical wand；
Step 5: the optical wand for coating copper plate is heated in heating-up temperature is 900 DEG C~1000 DEG C of electric furnace 50min~
120min, hot extrusion is carried out on the extruder that extrusion speed is 80mm/s~130mm/s, obtains titanium alloy pipe；
Step 6: using the copper sheet of titanium alloy pipe described in acid wash removal step five, titanium alloy pipe is obtained.
2. the preparation method of high-intensity titanium alloy pipe as claimed in claim 1, it is characterised in that also include Step 7: will
Titanium alloy pipe cold rolling shaping described in step 6.
3. the preparation method of high-intensity titanium alloy pipe as claimed in claim 2, it is characterised in that the step 7 is specific
For：
(71) breaking down is carried out to the titanium alloy pipe using the cold mills of LG two, obtains breaking down tubing；
(72) pickling 10min~30min is carried out to the breaking down tubing, then puts into the vacuum annealing that temperature is 500 DEG C~800 DEG C
Anneal 60min~90min in stove, to remove the greasy dirt of tube surfaces and oxide skin；
(73) the breaking down tubing repeat step (71) after annealing, (72) are carried out with the rolling of pony-roughing pass and finished product.
4. the preparation method of high-intensity titanium alloy pipe as claimed in claim 3, it is characterised in that sour in the step (72)
Pickle composition when washing is：35%~45% nitric acid, 3%~7% hydrofluoric acid, 48%~62% water.
5. the preparation method of high-intensity titanium alloy pipe as claimed in claim 1, it is characterised in that the titanium of the step 1 closes
The preparation method of ingot comprises the following steps：
(1) AlV65 that parts by weight are 4%~5% and the pure Al and 0.5% that parts by weight are 2%~3% are added in titanium sponge
~0.7% pure Fe, batch mixing is carried out in mixed material distributing machine；
(2) batch mixing in step (1) is pressed into electrode block on hydraulic press, then consutrode is made in electrode block；
(3) vacuum consumable electrode arc furnace is used, melting in the environment of being 1700 DEG C~1800 DEG C in smelting temperature, is once cast
Ingot；
(4) using an ingot casting as consutrode, in the environment of smelting temperature is 1700 DEG C~1800 DEG C, repeat step (3) is entered
Row melting, obtains titanium alloy ingot.
6. the preparation method of high-intensity titanium alloy pipe as claimed in claim 5, it is characterised in that the titanium alloy ingot each group
Point percentage by weight be：Aluminium 3.6%~4.4%, vanadium 2.6%~3.4%, iron 0.5%~0.8%, remaining is titanium and can not
The impurity avoided.
7. the preparation method of high-intensity titanium alloy pipe as claimed in claim 6, it is characterised in that the weight percent of the titanium
Than for 90.5%~94.5%, percentage by weight≤0.665% of the impurity.
8. the method for preparing high strength titanium alloy as claimed in claim 3, it is characterised in that also including step (5), by step
(4) the titanium alloy ingot surface car light that obtains simultaneously cuts off ingot butt and rising head.
9. the preparation method of high-intensity titanium alloy pipe as claimed in claim 1, it is characterised in that pickling in the step 6
The step of method is：Titanium alloy pipe with copper sheet is put into pickling 15min~30min in pickle, to remove titanium alloy tube
Copper in base, and rinsed well using clear water；
Wherein, pickle by 25%~35% sulfuric acid, 35%~45% nitric acid, 4%~6% hydrofluoric acid and 14%~
36% water composition.
10. the preparation method of high-intensity titanium alloy pipe as claimed in claim 1, it is characterised in that purple in the step 5
The thickness of copper coin is 0.8~1.0mm.
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| CN115463962A (en) * | 2022-07-21 | 2022-12-13 | 中钛国创(青岛)科技有限公司 | Preparation method of titanium alloy fiber wire |
| RU2794154C1 (en) * | 2021-11-02 | 2023-04-12 | Российская Федерация, от имени которой выступает Министерство промышленности и торговли Российской Федерации (Минпромторг России) | METHOD FOR MANUFACTURING PIPE BLANKS FROM TITANIUM PSEUDO α-ALLOYS 5V AND 37 |
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