CN114480896A - Preparation method of TA15-1 thin plate - Google Patents
Preparation method of TA15-1 thin plate Download PDFInfo
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- CN114480896A CN114480896A CN202210143000.1A CN202210143000A CN114480896A CN 114480896 A CN114480896 A CN 114480896A CN 202210143000 A CN202210143000 A CN 202210143000A CN 114480896 A CN114480896 A CN 114480896A
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- 238000002360 preparation method Methods 0.000 title abstract description 6
- 238000005096 rolling process Methods 0.000 claims abstract description 162
- 238000000034 method Methods 0.000 claims abstract description 102
- 230000008569 process Effects 0.000 claims abstract description 57
- 238000005097 cold rolling Methods 0.000 claims abstract description 44
- 238000005242 forging Methods 0.000 claims abstract description 35
- 238000002844 melting Methods 0.000 claims abstract description 11
- 230000008018 melting Effects 0.000 claims abstract description 11
- 238000000137 annealing Methods 0.000 claims description 34
- 230000009466 transformation Effects 0.000 claims description 8
- 238000010309 melting process Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 32
- 239000000463 material Substances 0.000 abstract description 15
- 238000005098 hot rolling Methods 0.000 abstract description 6
- 230000007704 transition Effects 0.000 abstract description 2
- 238000005406 washing Methods 0.000 description 31
- 239000000047 product Substances 0.000 description 29
- 239000011265 semifinished product Substances 0.000 description 26
- 239000003513 alkali Substances 0.000 description 21
- 238000004140 cleaning Methods 0.000 description 20
- 239000002253 acid Substances 0.000 description 18
- 238000001816 cooling Methods 0.000 description 17
- 238000004321 preservation Methods 0.000 description 16
- 238000003466 welding Methods 0.000 description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- 239000010936 titanium Substances 0.000 description 15
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 12
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 10
- 238000003825 pressing Methods 0.000 description 10
- 238000003723 Smelting Methods 0.000 description 9
- 238000005554 pickling Methods 0.000 description 9
- 239000000956 alloy Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 229910052719 titanium Inorganic materials 0.000 description 7
- 238000002156 mixing Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 229910052726 zirconium Inorganic materials 0.000 description 6
- 229910001182 Mo alloy Inorganic materials 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 5
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 230000007547 defect Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 238000003801 milling Methods 0.000 description 5
- ZPZCREMGFMRIRR-UHFFFAOYSA-N molybdenum titanium Chemical compound [Ti].[Mo] ZPZCREMGFMRIRR-UHFFFAOYSA-N 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 238000007493 shaping process Methods 0.000 description 5
- 239000011780 sodium chloride Substances 0.000 description 5
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Inorganic materials [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 229910000756 V alloy Inorganic materials 0.000 description 4
- HIMLGVIQSDVUJQ-UHFFFAOYSA-N aluminum vanadium Chemical compound [Al].[V] HIMLGVIQSDVUJQ-UHFFFAOYSA-N 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 4
- 229910001069 Ti alloy Inorganic materials 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910002064 alloy oxide Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
Classifications
-
- 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
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- 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
-
- C—CHEMISTRY; METALLURGY
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
- B21B2001/386—Plates
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
The invention provides a preparation method of a TA15-1 thin plate, which comprises the following steps: and sequentially carrying out vacuum consumable melting to obtain an ingot, forging and cogging, rough rolling and cogging, finish rolling and cogging, and cold rolling to obtain a TA15-1 sheet. The key point of the invention is that forging cogging and rough rolling cogging are carried out at a temperature slightly higher than the phase transition point through reasonable component proportion; adjusting the temperature and the deformation rate at the beginning of a finish rolling (hot rolling) stage, and entering a structure performance control stage, wherein the control key points comprise heating temperature, finish rolling temperature, deformation rate and the like; in the cold rolling stage, a cold rolling procedure and the deformation rate of a rolling process need to be designed, so that the material structure is fully crushed but not more than the deformation limit of the material structure; by adjusting the heat treatment process, the finished plate which has good comprehensive performance and meets the use requirement is finally obtained.
Description
Technical Field
The invention belongs to the technical field of titanium alloy plate manufacturing, and particularly relates to a TA15-1 sheet preparation method, which realizes control of mechanical properties of a finished plate through component control, heating temperature and deformation rate design and heat treatment control.
Background
TA15-1 as a near-alpha type titanium alloy is not generally applied at home at present and has a certain demand only in the field of sports and leisure; even TA15-1 is not mentioned in the relevant standards of titanium and titanium alloy plates such as GB/T3621 and the like, but from research, TA15-1 is a material with good comprehensive mechanical property and certain heat resistance, the strength can reach 800MPa through a certain control means, and the elongation can still reach more than 20%; therefore, the material has larger application space and is worthy of development and exploration.
Disclosure of Invention
In view of the above, the invention aims to provide a method for preparing a TA15-1 sheet, and the TA15-1 sheet prepared by the method provided by the invention has better performance and can meet the market demand.
The invention provides a preparation method of a TA15-1 thin plate, which comprises the following steps:
sequentially carrying out vacuum consumable melting to obtain an ingot, forging and cogging, rough rolling and cogging, finish rolling and cogging and cold rolling to obtain a TA15-1 sheet;
the component control in the vacuum consumable melting process comprises the following steps:
Al：2.5～2.7wt％；
Mo：0.8～1.2wt％；
V：0.8～1.2wt％；
Zr：1.4～1.6wt％；
O：0.08～0.1wt％；
the balance being Ti.
Preferably, the forging and cogging temperature is 25-35 ℃ higher than the phase transformation point.
Preferably, the forging and cogging are performed by 2-4 times of fire forging.
Preferably, the rough rolling cogging temperature is 25-35 ℃ lower than the phase change point.
Preferably, the thickness of the product after rough rolling and cogging is 18-20 mm.
Preferably, the temperature of the finish rolling and cogging is 55-65 ℃ lower than the transformation point.
Preferably, the finish rolling after cogging further comprises:
annealing is carried out;
the annealing temperature is 750-820 ℃.
Preferably, the deformation rate of the final rolling process in the cold rolling process is more than or equal to 10 percent; the deformation rate of any single rolling process is less than 40 percent.
Preferably, the annealing temperature in the cold rolling process is 750-820 ℃.
Preferably, the thickness of the cold-rolled product is 0.8-1.2 mm.
The key point of the invention is that through reasonable component proportion, forging cogging and rough rolling cogging are carried out at a temperature slightly higher than the phase transition point; adjusting the temperature and the deformation rate at the beginning of a finish rolling (hot rolling) stage, and entering a structure performance control stage, wherein the control key points comprise heating temperature, finish rolling temperature, deformation rate and the like; designing the deformation rate of a cold rolling procedure and a rolling process in a cold rolling stage to ensure that the material structure is fully crushed but not to exceed the deformation limit; by adjusting the heat treatment process, the finished plate which has good comprehensive performance and meets the use requirement is finally obtained.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a preparation method of a TA15-1 thin plate, which comprises the following steps:
and sequentially carrying out vacuum consumable melting to obtain an ingot, forging and cogging, rough rolling and cogging, finish rolling and cogging, and cold rolling to obtain the TA15-1 sheet.
In the present invention, the composition control in the vacuum consumable melting ingot casting process preferably includes:
Al：2.5～2.7wt％；
Mo：0.8～1.2wt％；
V：0.8～1.2wt％；
Zr：1.4～1.6wt％；
O：0.08～0.1wt％；
the balance being Ti.
In the present invention, the mass content of Al is preferably 2.6%; the mass content of Mo is preferably 0.9-1.1%, most preferably 1.0%; the mass content of V is preferably 0.9-1.1%, and more preferably 1.0%; the mass content of Zr is preferably 1.5%; the O content is preferably 0.09% by mass.
In the invention, sponge titanium is preferably adopted to be added with alloy components, and Mo and V elements are preferably added by adopting binary alloy materials, so that segregation is reduced, and the uniformity of the components is improved; the component O is added to improve the strength of the material; the ingredients in the vacuum consumable melting process preferably comprise:
the sponge titanium is added with pure aluminum, titanium molybdenum alloy, sponge zirconium, alumite alloy and titanium dioxide powder.
In the present invention, the components after the vacuum consumable melting and burdening preferably include:
Al：2.0～3.0wt％；
Mo：0.5～1.5wt％；
V：0.5～1.5wt％；
Zr：1.0～2.0wt％；
O：0.08～0.1wt％；
the balance being Ti.
In the present invention, the method for obtaining an ingot by vacuum consumable melting preferably includes:
preparing the materials, namely the titanium sponge and the alloy material according to the proportion, and then pressing to obtain an electrode block;
splicing the electrode blocks into electrode rods and welding and shaping the electrode rods;
and smelting the shaped electrode bar in a vacuum consumable electrode furnace to obtain an ingot.
In the invention, the pressure in the pressing process is preferably 7200-7500 tons, and the thickness of the obtained electrode block is preferably 195mm +/-2 mm.
In the invention, the welding method is preferably plasma welding; in the welding process, the vacuum degree is preferably less than or equal to 5Pa, the air leakage rate is preferably less than or equal to 1Pa/min, the current is preferably 420 +/-20A, and the voltage is preferably 50 +/-10V.
In the present invention, after obtaining an ingot, the ingot is preferably turned to a smooth state by a lathe.
In the invention, the temperature in the forging and cogging process is preferably higher than the phase transformation point by 25-35 ℃, more preferably higher than 28-32 ℃, and most preferably higher than 30 ℃; the forging and cogging temperature is preferably 950-990 ℃, more preferably 950-980 ℃, and most preferably 960-970 ℃; the heat-retaining time is preferably 1.2 to 1.5 minutes per mm of thickness or diameter, and more preferably 1.3 to 1.4 minutes.
In the invention, the forging cogging is preferably forged to a flat blank target size suitable for rolling by 2-4 fire times, and more preferably 3 fire times; the forging and cogging may be (76-80) mmX (600-640) mmX (800-1200) mm, may be (77-79) mmX (610-630) mmX (900-1100) mm, or may be 78 mmX 620 mmX 1000 mm.
In the present invention, the forging and cogging method preferably includes:
and after the ingot is heated, taking materials by using a tong vehicle, conveying the materials to a 4500-ton press, forging the ingot to a target thickness and width, wherein the length is freely extended, after the ingot is shaped into a relatively regular rectangle, sawing the length to the target length, and removing an oxide layer and defects on the surface of the plate blank by using a milling machine to obtain the plate blank for rough rolling.
In the invention, the temperature in the rough rolling and cogging process is preferably lower than the phase transformation point by 25-35 ℃, more preferably lower than 28-22 ℃, and most preferably lower than 30 ℃; the rough rolling cogging temperature is preferably 890-920 ℃, more preferably 900-910 ℃, and most preferably 905 ℃; the heat-retaining time is preferably 1.2 to 1.5 minutes per mm of thickness, more preferably 1.3 to 1.4 minutes.
In the invention, the rough rolling cogging is preferably performed for 2-3 times; the thickness of a product obtained after rough rolling and cogging is preferably 18-20 mm, and more preferably 19 mm.
In the present invention, the method for roughing and cogging preferably includes:
and after the plate blank is heated, rolling the plate blank to a target thickness by using a three-roll Lauter type rolling mill, and equally shearing the length according to the planned multiple length quantity to obtain a rough rolling semi-finished product for finish rolling.
In the invention, the temperature in the finish rolling and cogging process is preferably lower than 75-85 ℃ of the transformation point, more preferably lower than 78-82 ℃, and most preferably lower than 80 ℃; the temperature of the finish rolling and cogging is preferably 860-890 ℃, more preferably 870-880 ℃, and most preferably 875 ℃; the heat preservation time is preferably 1.2 to 1.5 minutes and 20 minutes per mm of thickness, and more preferably 1.3 to 1.4 minutes and 20 minutes per mm of thickness.
In the invention, the finish rolling and cogging are preferably rolled by 3-5 fire times to obtain a cold-rolled semi-finished product, and more preferably 4 fire times; the thickness of the cold-rolled semi-finished product is preferably designed according to the deformation rate of more than or equal to 30% of reserved cold rolling, more preferably 50-70%, more preferably 55-65%, and most preferably 60%; the thickness of the product after finish rolling and cogging is preferably 2.5-3.5 mm, more preferably 2.8-3.2 mm, and most preferably 3 mm.
In the present invention, it is preferable that the finish rolling and cogging further include:
and annealing is carried out.
In the invention, the annealing temperature is preferably 750-820 ℃, more preferably 780-800 ℃ and most preferably 790 ℃; the heat preservation time is preferably 1-1.2 minutes +15 minutes per mm of thickness, and more preferably 1.1 minutes +15 minutes; the cooling method is preferably air cooling.
In the present invention, the finish rolling cogging method preferably includes:
and after the rough rolling semi-finished product is heated, rolling the rough rolling semi-finished product to a target thickness through a two-roller reciprocating type rolling mill, and annealing and cleaning to obtain the semi-finished product for cold rolling.
In the present invention, the method of cleaning preferably includes:
firstly carrying out alkali washing and then carrying out acid washing.
In the invention, the alkali solution for alkali washing is preferably NaOH solution; the temperature of the alkali washing is preferably 440-470 ℃, and more preferably 450-460 ℃; the time for the alkali washing is preferably 20 to 30 minutes, and more preferably 25 minutes.
In the present invention, the reagents for acid washing preferably include:
H2SO4、NaCl、NaNO3and water.
In the present invention, H in the acid-washing reagent2SO4The concentration of (b) is preferably 40 to 50%, more preferably 45%.
In the invention, the pickling time is preferably 15 to 20 minutes.
In the invention, the thickness of the cold-rolled product is preferably 0.8-1.2 mm, and more preferably 1 mm; in the cold rolling process, the cold rolling procedure is preferably divided into 1-3 rolling passes according to the reserved deformation; the deformation rate of the final rolling process in the cold rolling process is preferably more than or equal to 10%, more preferably 30-35%, and most preferably 32-33%; the deformation ratio in any single rolling process is preferably less than 40%, more preferably 30-35%, and most preferably 32-33%.
In the present invention, the annealing method in the cold rolling process is preferably the same as the annealing method after the finish rolling cogging in the above-described embodiment, that is: the annealing temperature is preferably 750-820 ℃, more preferably 780-800 ℃ and most preferably 790 ℃; the heat preservation time is preferably 1-1.2 minutes +15 minutes per mm of thickness, and more preferably 1.1 minutes +15 minutes; the cooling method is preferably air cooling.
In the present invention, the method of cold rolling preferably includes:
and (3) cold rolling is carried out by adopting a 4-roller reciprocating type rolling mill, multi-pass rolling forming is carried out, the deformation rate of a single rolling process is controlled to be 30-40% in the rolling process, annealing softening is carried out after the single rolling process is finished, acid pickling is carried out to remove oxide skins, and then rolling of the next rolling process is carried out.
In the present invention, it is preferable that the cold rolling step further includes:
the finished product was annealed, cleaned and straightened to give a TA15-1 sheet.
In the invention, the annealing temperature of the finished product is preferably 720-800 ℃, more preferably 740-780 ℃, more preferably 750-770 ℃, and most preferably 760 ℃; the heat preservation time is preferably 1-1.2 minutes +15 minutes per mm of thickness, and more preferably 1.1 minute; the cooling method is preferably air cooling.
In the present invention, the cleaning method is the same as that described in the above technical solution, and is not described herein again.
The tissue deterioration in the heating process is avoided by controlling the heating temperature; the deformation rates of the hot rolling process and the cold rolling process are distributed, and the deformation process is put into the hot rolling process as far as possible on the premise of ensuring the minimum deformation rate of the cold rolling process, so that the production efficiency is improved; the deformation rate of each rolling process of cold rolling is reasonably distributed, the minimum deformation rate of the last rolling process is ensured, and the cracking of the machining process caused by the overlarge deformation rate of the rolling process is avoided. The invention realizes the excellent comprehensive performance index of the obtained product by component control, finish rolling temperature and deformation process control, cold rolling deformation rate design and heat treatment control, and meets the use requirement of the product in the sports and leisure field.
Example 1 production of Cold rolled sheet with a thickness of 1.0mm
The cold-rolled sheet is prepared according to the following process flow:
vacuum consumable melting to obtain an ingot → forging cogging → rough rolling cogging → finish rolling cogging → cold rolling finished product → heat treatment;
when the electrodes are smelted and pressed in a vacuum consumable manner, pure aluminum, titanium molybdenum alloy, sponge zirconium, aluminum vanadium alloy and TiO are respectively added into the sponge titanium according to the planned component proportion of the raw materials according to the component conditions2Powder, wherein the components after proportioning meet the following ranges:
al: 2.0-3.0%; mo: 0.5-1.5%; v: 0.5-1.5%; zr: 1.0-2.0%; o: 0.08-0.1%; the balance being Ti;
mixing titanium sponge and alloy materials according to a planned proportion, pressing the mixture into electrode blocks, splicing the electrode blocks into electrode rods, and welding and shaping the electrode rods by adopting a vacuum plasma welding box; smelting the welded electrode bar twice in a vacuum consumable electrode furnace; the ingot after twice smelting is polished and scalped to obtain a polished ingot for forging; the pressure in the pressing process is 7200-7500 tons, and the thickness of the pressed electrode block is 195mm +/-2 mm; in the welding process, the vacuum degree is less than or equal to 5Pa, the air leakage rate is less than or equal to 1Pa/min, the current is 420 +/-20A, and the voltage is 50 +/-10V;
the forging heating temperature in the forging and cogging process is 950-990 ℃, and the heat preservation time is 600 min; the cogging specification is 78mm multiplied by 620mm multiplied by 1000 mm; after the ingot is heated, a material is taken by using a tong vehicle and is sent to a 4500-ton press, the ingot is forged to a target thickness and width, the length is freely extended and is shaped into a relatively regular rectangle, the length is sawed into a target length, and an oxide layer and defects on the surface of the plate blank are removed by a milling machine to obtain the plate blank for rough rolling;
in the rough rolling and cogging processes, two rolling processes of rough rolling and cogging are carried out, the heating temperature is 890-920 ℃, and the heat preservation time is 120 min; the cogging thickness is 18 mm; after the plate blank is heated, the plate blank is rolled to the target thickness through a three-roll Lauter type rolling mill, and the length is cut in equal parts according to the planned multiple length quantity in advance to obtain a rough rolling semi-finished product for finish rolling;
in the finish rolling and cogging processes, finish rolling and cogging are carried out for four rolling passes, the heating temperature is 860-890 ℃, and the heat preservation time is 45 min; the cogging thickness is 2.3 mm; after the rough rolling semi-finished product is heated, the rough rolling semi-finished product is rolled to a target thickness through a two-roller reciprocating type rolling mill, and annealing and cleaning are carried out to obtain a semi-finished product for cold rolling; the annealing process of the semi-finished product after finish rolling and cogging comprises the following steps:
cooling at 800 +/-10 deg.c for 20 min;
the cleaning method comprises the following steps: performing alkali washing and acid washing, wherein an NaOH solution is used for alkali washing, the alkali washing temperature is 440-470 ℃, and the alkali washing time is 20-30 minutes; pickling with H2SO4、NaCl、NaNO3And water, wherein the acid concentration is 40-50%, and the acid washing time is 15-20 minutes;
in the cold rolling process, the target size of a first rolling process is 1.5mm, the deformation rate is 34.8%, the target size of a second rolling process (a final rolling process) is 1.0mm, and the deformation rate is 33.3%; a 4-roller reciprocating type rolling mill is adopted for multi-pass rolling forming, the deformation rate of a single rolling process is controlled to be 30-40% in the rolling process, annealing softening is carried out after the single rolling process is finished, acid pickling is carried out to remove oxide scale, and then rolling of the next rolling process is carried out; the annealing and softening process comprises the following steps:
cooling at 800 +/-10 deg.c for 16 min;
annealing, cleaning and straightening the finished product to obtain a final finished product plate; the heat treatment (finished product annealing) process comprises the following steps:
air cooling at 760 deg.C for 15 min;
the cleaning method is the same as the cleaning method.
The product prepared in the embodiment 1 of the invention is subjected to performance detection, the room temperature tensile property is detected according to GB/T228 metal material room temperature tensile test method, the grain size is detected according to GB/T6394 metal average grain size determination method, and the detection result is as follows:
transverse room temperature mechanical property of plate
The product prepared in the embodiment 1 of the invention has the advantages of stable processing process, fine grain size and good comprehensive mechanical property.
The components of the plate prepared in the embodiment 1 of the invention are detected by the method specified in GB/T4698, and the detection result is as follows: al: 2.51 wt%, Mo: 0.94 wt%, V: 0.95 wt%, Zr: 1.57 wt%, O: 0.82 percent and the balance of Ti.
Example 2 Cold Rolling Single Rolling Stroke Large deformation production of sheet with thickness of 1.0mm
The cold-rolled sheet is prepared according to the following process flow:
vacuum consumable melting to obtain an ingot → forging cogging → rough rolling cogging → finish rolling cogging → cold rolling finished product → heat treatment;
when the electrode is smelted and pressed in a vacuum consumable mode, pure aluminum, titanium-molybdenum alloy, sponge zirconium, aluminum-vanadium alloy and TiO are respectively added into the sponge titanium according to the planned component proportion of the component conditions of the raw materials2Powder, so that the ingredients after the mixing meet the following ranges:
al: 2.0-3.0%; mo: 0.5-1.5%; v: 0.5-1.5%; zr: 1.0-2.0%; o: 0.08-0.1%; the balance being Ti;
mixing titanium sponge and alloy materials according to a planned proportion, pressing the mixture into electrode blocks, splicing the electrode blocks into electrode rods, and welding and shaping the electrode rods by adopting a vacuum plasma welding box; smelting the welded electrode bar twice in a vacuum consumable electrode furnace; the ingot after twice smelting is polished and scalped to obtain a polished ingot for forging; the pressure in the pressing process is 7200-7500 tons, and the thickness of the pressed electrode block is 195mm +/-2 mm; in the welding process, the vacuum degree is less than or equal to 5Pa, the gas leakage rate is less than or equal to 1Pa/min, the current is 420 +/-20A, and the voltage is 50 +/-10V;
the forging heating temperature is 950-990 ℃ in the forging and cogging process, and the heat preservation time is 600 min; the cogging specification is 78mm multiplied by 620mm multiplied by 1000 mm; after the ingot is heated, a material is taken by using a tong vehicle and is sent to a 4500-ton press, the ingot is forged to a target thickness and width, the length is freely extended and is shaped into a relatively regular rectangle, the length is sawed into a target length, and an oxide layer and defects on the surface of the plate blank are removed by a milling machine to obtain the plate blank for rough rolling;
in the rough rolling process, two rolling processes of rough rolling and cogging are carried out, the heating temperature is 890-920 ℃, and the heat preservation time is 120 min; the cogging thickness is 18 mm; after the plate blank is heated, the plate blank is rolled to the target thickness through a three-roll Lauter type rolling mill, and the length is cut in equal parts according to the planned multiple length quantity in advance to obtain a rough rolling semi-finished product for finish rolling;
in the finish rolling and cogging processes, finish rolling and cogging are carried out for four rolling passes, the heating temperature is 860-890 ℃, and the heat preservation time is 45 min; the cogging thickness is 2.3 mm; after the rough rolling semi-finished product is heated, the rough rolling semi-finished product is rolled to a target thickness through a two-roller reciprocating type rolling mill, and annealing and cleaning are carried out to obtain a semi-finished product for cold rolling; the annealing process of the semi-finished product after finish rolling and cogging comprises the following steps:
cooling at 820 +/-10 deg.c for 20 min;
the cleaning method comprises the following steps: performing alkali washing and acid washing, wherein an NaOH solution is used for alkali washing, the alkali washing temperature is 440-470 ℃, and the alkali washing time is 20-30 minutes; pickling with H2SO4、NaCl、NaNO3And water, wherein the acid concentration is 40-50%, and the acid washing time is 15-20 minutes;
in the cold rolling process, the target size of a first rolling process (final rolling process) of the cold rolling is 1.0mm, the deformation rate is 56.5%, and when the cold rolling is carried out to about 1.2mm, the deformation is difficult and a large amount of cracks appear.
Although the increase of the deformation rate of the final rolling process is beneficial to improving the mechanical property of the product, the material loses plasticity and cracks when the deformation rate is larger than a critical value.
Example 3 Cold rolled sheet having a thickness of 1.0mm was produced by increasing the total deformation rate of the cold rolling step
The cold-rolled sheet is prepared according to the following process flow:
vacuum consumable melting to obtain an ingot → forging cogging → rough rolling cogging → finish rolling cogging → cold rolling finished product → heat treatment;
when the electrode is smelted and pressed in a vacuum consumable mode, pure aluminum, titanium-molybdenum alloy, sponge zirconium, aluminum-vanadium alloy and TiO are respectively added into the sponge titanium according to the planned component proportion of the component conditions of the raw materials2Powder, so that the ingredients after the mixing meet the following ranges:
al: 2.0-3.0%; mo: 0.5-1.5%; v: 0.5-1.5%; zr: 1.0-2.0%; o: 0.08-0.1%; the balance being Ti;
mixing titanium sponge and alloy materials according to a planned proportion, pressing the mixture into electrode blocks, splicing the electrode blocks into electrode rods, and welding and shaping the electrode rods by adopting a vacuum plasma welding box; smelting the welded electrode bar twice in a vacuum consumable electrode furnace; the ingot after twice smelting is polished and scalped to obtain a polished ingot for forging; the pressure in the pressing process is 7200-7500 tons, and the thickness of the pressed electrode block is 195mm +/-2 mm; in the welding process, the vacuum degree is less than or equal to 5Pa, the air leakage rate is less than or equal to 1Pa/min, the current is 420 +/-20A, and the voltage is 50 +/-10V;
the forging heating temperature is 950-990 ℃ in the forging and cogging process, and the heat preservation time is 600 min; the cogging specification is 78mm multiplied by 620mm multiplied by 1000 mm; after the ingot is heated, a material is taken by using a tong vehicle and is sent to a 4500-ton press, the ingot is forged to a target thickness and width, the length is freely extended and is shaped into a relatively regular rectangle, the length is sawed into a target length, and an oxide layer and defects on the surface of the plate blank are removed by a milling machine to obtain the plate blank for rough rolling;
in the rough rolling and cogging processes, two rolling processes of rough rolling and cogging are carried out, the heating temperature is 890-920 ℃, and the heat preservation time is 120 min; the cogging thickness is 18 mm; after the plate blank is heated, the plate blank is rolled to the target thickness through a three-roll Lauter type rolling mill, and the length is cut in equal parts according to the planned multiple length quantity in advance to obtain a rough rolling semi-finished product for finish rolling;
in the finish rolling and cogging processes, finish rolling and cogging are carried out for four rolling passes, the heating temperature is 860-890 ℃, and the heat preservation time is 45 min; the cogging thickness is 3.5 mm; after the rough rolling semi-finished product is heated, the rough rolling semi-finished product is rolled to a target thickness through a two-roller reciprocating type rolling mill, and annealing and cleaning are carried out to obtain a semi-finished product for cold rolling; the annealing process of the semi-finished product after finish rolling and cogging comprises the following steps:
cooling at 800 +/-10 deg.c for 20 min;
the cleaning method comprises the following steps: performing alkali washing and acid washing, wherein an NaOH solution is used for alkali washing, the alkali washing temperature is 440-470 ℃, and the alkali washing time is 20-30 minutes; pickling with H2SO4、NaCl、NaNO3And water, wherein the acid concentration is 40-50%, and the acid washing time is 15-20 minutes;
in the cold rolling process, the target size of a first rolling process is 2.2mm, the deformation rate is 33.3%, the target size of a second rolling process is 1.5mm, the deformation rate is 31.8%, the target size of a third rolling process (final rolling process) is 1.0mm, and the deformation rate is 33.3%; a 4-roller reciprocating type rolling mill is adopted for multi-pass rolling forming, the deformation rate of a single rolling process is controlled to be 30-40% in the rolling process, annealing softening is carried out after the single rolling process is finished, acid pickling is carried out to remove oxide scale, and then rolling of the next rolling process is carried out; the annealing and softening processes are respectively as follows:
air cooling at 800 plus or minus 10 ℃ for 18 minutes; air cooling at 800 plus or minus 10 ℃ for 16 minutes;
annealing, cleaning and straightening the finished product to obtain a final finished product plate; the heat treatment (finished product annealing) process comprises the following steps:
air cooling at 760 deg.C for 15 min;
the cleaning method is the same as the above cleaning method.
The product prepared in example 3 of the present invention was tested for properties according to the method of example 1, and the test results are as follows:
transverse room temperature mechanical property of plate
In example 3, the cold rolling step increased the deformation ratio by 30%, and the performance was slightly improved, but the improvement was not significant.
Example 4 high temperature cogging production of Cold rolled sheet with a thickness of 1.0mm
The cold-rolled sheet is prepared according to the following process flow:
vacuum consumable melting to obtain an ingot → forging cogging → rough rolling cogging → finish rolling cogging → cold rolling finished product → heat treatment;
when the electrodes are smelted and pressed in a vacuum consumable manner, pure aluminum, titanium molybdenum alloy, sponge zirconium, aluminum vanadium alloy and TiO are respectively added into the sponge titanium according to the planned component proportion of the raw materials according to the component conditions2Powder, the components after proportioning meet the following ranges:
al: 2.0-3.0%; mo: 0.5-1.5%; v: 0.5-1.5%; zr: 1.0-2.0%; o: 0.08-0.1%; the balance being Ti;
mixing titanium sponge and alloy materials according to a planned proportion, pressing the mixture into electrode blocks, splicing the electrode blocks into electrode rods, and welding and shaping the electrode rods by adopting a vacuum plasma welding box; smelting the welded electrode bar twice in a vacuum consumable electrode furnace; the ingot after twice smelting is polished and scalped to obtain a polished ingot for forging; the pressure in the pressing process is 7200-7500 tons, and the thickness of the pressed electrode block is 195mm +/-2 mm; in the welding process, the vacuum degree is less than or equal to 5Pa, the air leakage rate is less than or equal to 1Pa/min, the current is 420 +/-20A, and the voltage is 50 +/-10V;
the forging heating temperature is 1000-1050 ℃ in the forging and cogging process, and the heat preservation time is 600 min; the cogging specification is 78mm multiplied by 620mm multiplied by 1000 mm; after the ingot is heated, a material is taken by using a tong vehicle and is sent to a 4500-ton press, the ingot is forged to a target thickness and width, the length is freely extended and is shaped into a relatively regular rectangle, the length is sawed into a target length, and an oxide layer and defects on the surface of the plate blank are removed by a milling machine to obtain the plate blank for rough rolling;
in the rough rolling and cogging processes, two rolling processes of rough rolling and cogging are carried out, the heating temperature is 950-1000 ℃, and the heat preservation time is 120 min; the cogging thickness is 18 mm; after the plate blank is heated, the plate blank is rolled to the target thickness through a three-roll Lauter type rolling mill, and the length is cut in equal parts according to the planned multiple length quantity in advance to obtain a rough rolling semi-finished product for finish rolling;
in the finish rolling and cogging processes, the finish rolling and cogging are carried out for three rolling passes, the heating temperature is 950-980 ℃, and the heat preservation time is 45 min; the cogging thickness is 2.3 mm; after the rough rolling semi-finished product is heated, the rough rolling semi-finished product is rolled to a target thickness through a two-roller reciprocating type rolling mill, and annealing and cleaning are carried out to obtain a semi-finished product for cold rolling; the annealing process of the semi-finished product after finish rolling and cogging comprises the following steps:
cooling at 820 +/-10 deg.c for 20 min;
the cleaning method comprises the following steps: performing alkali washing and acid washing, wherein an NaOH solution is used for alkali washing, the alkali washing temperature is 440-470 ℃, and the alkali washing time is 20-30 minutes; pickling with H2SO4、NaCl、NaNO3And water, wherein the acid concentration is 40-50%, and the acid washing time is 15-20 minutes;
in the cold rolling process, the target size of a first rolling process is 1.5mm, the deformation rate is 34.8%, the target size of a second rolling process (a final rolling process) is 1.0mm, and the deformation rate is 33.3%; a 4-roller reciprocating type rolling mill is adopted for multi-pass rolling forming, the deformation rate of a single rolling process is controlled to be 30-40% in the rolling process, annealing softening is carried out after the single rolling process is finished, acid pickling is carried out to remove oxide scale, and then rolling of the next rolling process is carried out; the annealing and softening process comprises the following steps:
cooling at 800 +/-10 deg.c for 16 min;
annealing, cleaning and straightening the finished product to obtain a final finished product plate; the heat treatment (finished product annealing) process comprises the following steps:
air cooling at 760 deg.C for 15 min;
the cleaning method is the same as the above cleaning method.
The product prepared in the embodiment 4 of the invention is subjected to performance detection according to the method in the embodiment 1, and the detection result is as follows:
transverse room temperature mechanical property of plate
In the embodiment 4 of the invention, high-temperature heating is adopted in the heating stage, so that the production efficiency is improved, but a large amount of lamellar structure residues are generated due to high temperature, the crushing effect is poor in the cold rolling stage, the plasticity index of a finished product is reduced, and the strength index has large fluctuation.
According to the invention, the heating temperature is controlled in the hot rolling process, the higher heating temperature is used in the forging process, the production efficiency is improved, and then the temperature is gradually reduced in the hot rolling process so as to avoid the influence of excessive lamellar structure residues on the final product performance; the method provided by the invention has strong operability, and the optimal deformation rate combination can be selected by self to complete cold rolling processing according to different equipment conditions by designing the relevant critical deformation rate; the method provided by the invention enables the finished product plate of TA15-1 to have good comprehensive performance.
While the invention has been described and illustrated with reference to specific embodiments thereof, such description and illustration are not intended to limit the invention. It will be clearly understood by those skilled in the art that various changes may be made to adapt a particular situation, material, composition of matter, substance, method or process to the objective, spirit and scope of this application without departing from the true spirit and scope of the invention as defined by the appended claims. All such modifications are intended to be within the scope of the claims appended hereto. Although the methods disclosed herein have been described with reference to particular operations performed in a particular order, it should be understood that these operations may be combined, sub-divided, or reordered to form equivalent methods without departing from the teachings of the present disclosure. Accordingly, unless specifically indicated herein, the order and grouping of the operations is not a limitation of the present application.
Claims (10)
1. A method for preparing a TA15-1 sheet, comprising:
sequentially carrying out vacuum consumable melting to obtain an ingot, forging and cogging, rough rolling and cogging, finish rolling and cogging and cold rolling to obtain a TA15-1 sheet;
the component control in the vacuum consumable melting process comprises the following steps:
Al：2.5～2.7wt％；
Mo：0.8～1.2wt％；
V：0.8～1.2wt％；
Zr：1.4～1.6wt％；
O：0.08～0.1wt％；
the balance being Ti.
2. The method of claim 1, wherein the forging cogging temperature is 25-35 ℃ above the transformation point.
3. The method of claim 1, wherein the forging cogging is performed with 2 to 4 passes of hot forging.
4. The method according to claim 1, wherein the rough rolling cogging temperature is 25-35 ℃ below the transformation point.
5. The method according to claim 1, wherein the thickness of the product after rough rolling and cogging is 18-20 mm.
6. The method according to claim 1, wherein the finish rolling cogging temperature is 55-65 ℃ below the transformation point.
7. The method of claim 1, further comprising, after completion of said finish rolling cogging:
annealing is carried out;
the annealing temperature is 750-820 ℃.
8. The method of claim 1, wherein the deformation rate of the cold rolling process in the last rolling process is more than or equal to 10%; the deformation rate of any single rolling process is less than 40 percent.
9. The method according to claim 1, wherein the annealing temperature in the cold rolling process is 750-820 ℃.
10. The method according to claim 1, wherein the thickness of the product after cold rolling is 0.8-1.2 mm.
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| JP2021080489A (en) * | 2019-11-14 | 2021-05-27 | 日本製鉄株式会社 | Titanium alloy thin plate and manufacturing method of titanium alloy thin plate |
| CN113578959A (en) * | 2021-06-27 | 2021-11-02 | 中国科学院金属研究所 | Preparation method of fine-grain TA15 titanium alloy foil |
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| CN101407873A (en) * | 2008-11-21 | 2009-04-15 | 宝鸡钛业股份有限公司 | High-ductility medium-strength titanium alloy |
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| JP2019157250A (en) * | 2018-03-16 | 2019-09-19 | 日本製鉄株式会社 | Titanium alloy sheet and golf club head |
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