CN114798798A - Preparation method of TB8 titanium alloy plate - Google Patents
Preparation method of TB8 titanium alloy plate Download PDFInfo
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- CN114798798A CN114798798A CN202210449531.3A CN202210449531A CN114798798A CN 114798798 A CN114798798 A CN 114798798A CN 202210449531 A CN202210449531 A CN 202210449531A CN 114798798 A CN114798798 A CN 114798798A
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- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 150
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 238000005096 rolling process Methods 0.000 claims abstract description 82
- 239000000463 material Substances 0.000 claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 14
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 14
- 238000000137 annealing Methods 0.000 claims abstract description 11
- 239000003973 paint Substances 0.000 claims abstract description 10
- 230000001680 brushing effect Effects 0.000 claims abstract description 6
- 238000000227 grinding Methods 0.000 claims description 48
- 238000000034 method Methods 0.000 claims description 20
- 238000000576 coating method Methods 0.000 claims description 11
- 238000011049 filling Methods 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 230000003064 anti-oxidating effect Effects 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052786 argon Inorganic materials 0.000 abstract description 2
- 238000005098 hot rolling Methods 0.000 description 10
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 3
- 241000264877 Hippospongia communis Species 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000011156 metal matrix composite Substances 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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- 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
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
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Abstract
The preparation method of the TB8 titanium alloy plate disclosed by the embodiment of the invention comprises the following steps: obtaining a plurality of TB8 titanium alloy slabs; brushing high-temperature-resistant antioxidant paint on the surface of each TB8 titanium alloy plate blank, and heating the TB8 titanium alloy plate blank coated with the antioxidant paint; respectively rolling each TB8 titanium alloy plate blank subjected to heat treatment by one fire to obtain a plurality of once-rolled titanium alloy plate blanks; superposing the once-rolled titanium alloy plate materials to form a superposed assembly; preheating the superposed assembly, carrying out two-fire rolling on the preheated superposed assembly, and splitting the superposed assembly subjected to the two-fire rolling to obtain a plurality of pretreated TB8 titanium alloy plates; and (3) carrying out argon-filled on-line continuous annealing treatment on each pretreated TB8 titanium alloy plate to obtain the TB8 titanium alloy plate with the thickness of 0.35-2.0 mm. Further, the consistency of the finished TB8 titanium alloy plate can be effectively improved by adopting the preparation method.
Description
Technical Field
The invention belongs to the technical field of titanium alloy plate preparation, and particularly relates to a preparation method of a TB8 titanium alloy plate.
Background
The TB8 titanium alloy was the titanium alloy first developed by Timet in the end of the 80's 20 th century (Ti-15 Mo-2.7 Nb-3A 1-0.2 Si). The alloy is a metastable beta-type titanium alloy, can be used for manufacturing airplane structural parts or engine structural parts with temperature requirements, honeycombs, fasteners, hydraulic pipes and the like, and can also be used as matrix castings of metal matrix composite materials and the like. Fills the gap of the high-strength anti-oxidation and anti-corrosion shear alloy, and draws wide attention in the fields of aerospace and other industries.
The current preparation method of the TB8 titanium alloy generally comprises the following steps: 1. reversing rolling is adopted after the first fire rolling to obtain a finished product, so that the subsequent rolling directions of the plate after hot rolling and thinning are consistent, and the texture change caused by hot rolling and rolling direction changing is avoided; 2. in order to fully utilize the high temperature of the first hot rolling (the subsequent hot rolling is generally carried out at a lower temperature for ensuring the structure and the performance), the first hot rolling adopts a larger deformation amount and multi-pass rolling.
The existing rolling method has the following problems: the plate is rolled along the length all the time after being heated, namely after reversing, the deformation rate in one direction after rolling to a finished product is overlarge, and the finished plate has large anisotropy and is not beneficial to subsequent processing and forming.
Disclosure of Invention
The invention provides a preparation method of a TB8 titanium alloy plate, which is used for solving the technical problem that a finished plate processed by the existing means has large anisotropy and is not beneficial to subsequent processing and forming.
In order to solve the technical problem, the preparation method of the TB8 titanium alloy sheet disclosed in the embodiment of the present invention comprises:
obtaining a plurality of TB8 titanium alloy slabs;
brushing high-temperature-resistant antioxidant paint on the surface of each TB8 titanium alloy plate blank, and heating the TB8 titanium alloy plate blank coated with the antioxidant paint;
respectively rolling each TB8 titanium alloy plate blank subjected to heat treatment at one fire to obtain a plurality of once-rolled titanium alloy plate materials;
superposing the once-rolled titanium alloy plate materials to form a superposed assembly;
preheating the stacking assembly, carrying out two-fire rolling on the preheated stacking assembly, and splitting the stacking assembly subjected to the two-fire rolling to obtain a plurality of pretreated TB8 titanium alloy plates;
and carrying out argon-filling on-line continuous annealing treatment on each pretreated TB8 titanium alloy plate to obtain a TB8 titanium alloy plate with the thickness of 0.35-2.0 mm.
Optionally, the method comprises the step of heating the TB8 titanium alloy plate blank coated with the antioxidant coating, wherein the heating temperature is 800-.
Optionally, the one-shot rolling is one-way rolling, and the deformation rate of the one-shot rolling is not less than 60%.
Optionally, the two-heat rolling is bidirectional rolling, and the deformation rate of the two-heat rolling is not lower than 50%.
Optionally, the step of stacking each of the once-rolled titanium alloy plates to form a stack assembly includes:
and respectively coating isolation coatings on the plate surfaces of the once-rolled titanium alloy plate materials.
Optionally, before performing argon-filling on-line continuous annealing treatment on each pretreated TB8 titanium alloy sheet to obtain a TB8 titanium alloy sheet with a thickness of 0.35mm to 2.0mm, the method further includes:
and (4) uncoiling, cutting to length, leveling in an earth furnace and performing surface finishing on the pretreated TB8 titanium alloy plate.
Optionally, the surface finishing step is flat grinding and sanding, and includes the following steps:
fixing a vacuum chuck on a flat grinding reference platform in advance, ensuring that the upper reference surface of the vacuum chuck is kept horizontal, and paving a rectangular sealing rubber strip in a grid gap belt of the upper reference surface of the chuck according to the length and width of the titanium alloy plate close to the pretreated TB 8;
placing the pre-treated TB8 titanium alloy plate after being subjected to pressure leveling in the ground furnace on the reference surface of a vacuum chuck, ensuring that the sealing rubber strips are completely covered, keeping four sides equidistant, starting the vacuum chuck to work, evacuating to the maximum adsorption force, and completely adsorbing and compacting the pre-treated TB8 titanium alloy plate after being subjected to pressure leveling in the ground furnace and the reference surface;
starting a flat grinding machine, carrying out flat grinding cutting processing on the surface of the pretreated TB8 titanium alloy plate subjected to leveling by the grinding wheel according to different material consumption rates, and adopting automatic compensation of feeding of the grinding wheel of the grinding machine in the grinding process to ensure that the actual grinding amount of each flat grinding of each surface of the acid-washed cold-rolled coil blank subjected to leveling by the ground furnace pressure is consistent, wherein the grinding amount is 0.3-0.4 mm, the single grinding amount is 0.04mm, the grinding frequency is not more than 10 times, and the grinding speed is 1 min/time, so as to obtain a pretreated TB8 titanium alloy plate subjected to flat grinding;
adjusting the gap of the abrasive belt machine to the thickness of the TB8 titanium alloy plate in advance;
sanding is sequentially carried out according to the sequence of (240 meshes-320 meshes) - (400 meshes-600 meshes) - (800 meshes-1000 meshes) - (1200 meshes-2000 meshes), each surface of the TB8 titanium alloy plate after flat grinding is sanded twice by adopting the same abrasive belt, and the sanding standard is as follows: the surface smoothness reaches Ra less than or equal to 0.3 mu m.
Optionally, before the step of preheating the stack assembly and performing two-fire rolling on the preheated stack assembly, the method further includes:
and respectively covering flexible cover plates on the upper surface and the lower surface of the titanium superposed component.
Optionally, the parameters of the one-shot rolling are as follows: the temperature is 900 ℃ and 950 ℃, the temperature is kept for 5-10 min, the rolling speed is 2-4 m/s, and the rolling mode is forward-length rolling.
Optionally, the parameters of the two-fire rolling are as follows: 1200 and 1250 ℃, the temperature is kept for 15-20 min, the rolling speed is 0.5-1 m/s, and the rolling mode is sequential-long rolling.
The preparation method of the TB8 titanium alloy plate disclosed by the embodiment of the invention comprises the following steps: obtaining a plurality of TB8 titanium alloy slabs; brushing high-temperature-resistant antioxidant paint on the surface of each TB8 titanium alloy plate blank, and heating the TB8 titanium alloy plate blank coated with the antioxidant paint; respectively rolling each TB8 titanium alloy plate blank subjected to heat treatment at one fire to obtain a plurality of once-rolled titanium alloy plate materials; superposing the once-rolled titanium alloy plate materials to form a superposed assembly; preheating the stacking assembly, carrying out two-fire rolling on the preheated stacking assembly, and splitting the stacking assembly subjected to the two-fire rolling to obtain a plurality of pretreated TB8 titanium alloy plates; and carrying out argon-filling on-line continuous annealing treatment on each pretreated TB8 titanium alloy plate to obtain a TB8 titanium alloy plate with the thickness of 0.35-2.0 mm. According to the preparation method, the plurality of TB8 titanium alloy slabs are respectively rolled in one fire, and then the TB8 titanium alloy slabs which are rolled in one fire are overlapped to be rolled in two fires, so that the stress between the TB8 titanium alloy slabs is uniform, and the consistency of the finished TB8 titanium alloy plates can be effectively improved.
Drawings
Fig. 1 is a flowchart of a method for manufacturing a titanium alloy plate provided by the present application.
FIG. 2 is a metallographic structure morphology of a titanium alloy plate prepared according to the present application.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The TB8 titanium alloy was the titanium alloy first developed by Timet in the end of the 80's 20 th century (Ti-15 Mo-2.7 Nb-3A 1-0.2 Si). The alloy is a metastable beta-type titanium alloy, can be used for manufacturing airplane structural parts or engine structural parts with temperature requirements, honeycombs, fasteners, hydraulic pipes and the like, and can also be used as matrix castings of metal matrix composite materials and the like. Fills the blank of the high-strength anti-oxidation and anti-corrosion shear alloy, and draws wide attention in the fields of aerospace and other industries.
The current preparation method of the TB8 titanium alloy generally comprises the following steps: 1. reversing rolling is adopted after the first fire rolling to obtain a finished product, so that the subsequent rolling directions of the plate after hot rolling and thinning are consistent, and the texture change caused by hot rolling and rolling direction changing is avoided; 2. in order to fully utilize the high temperature of the first hot rolling (the subsequent hot rolling is generally carried out at a lower temperature for ensuring the structure and the performance), the first hot rolling adopts a larger deformation amount and multi-pass rolling.
The existing rolling method has the following problems: the plate is rolled along the length all the time after being heated, namely after reversing, the deformation rate in one direction after rolling to a finished product is overlarge, and the finished plate has large anisotropy and is not beneficial to subsequent processing and forming.
In summary, the existing sheet material is rolled along the length after being heated and then reversed, the deformation rate in one direction after rolling to a finished product is too large, and the finished sheet material has large anisotropy and is not beneficial to subsequent processing and forming.
In order to improve the plate consistency of the finished TB8 titanium alloy plate, a plurality of TB8 titanium alloy plates can be overlapped and rolled, so that uniform pressure is applied to all the TB8 titanium alloy plates, and the consistency of the TB8 titanium alloy plates can be effectively improved.
Based on this, the applicant conceives the technical scheme of the present application, which is specifically as follows: referring to fig. 1-2, a method for preparing a TB8 titanium alloy sheet disclosed in the embodiments of the present invention includes: step S110-step S160:
and S110, obtaining a plurality of TB8 titanium alloy slabs.
In this exemplary embodiment, the TB8 titanium alloy slab has a composition of Al: 3% -4%, V: 7.5% -8.5%, Cr: 5.5% -6.5%, Mo: 3.5% -4.5%, Zr: 3.5 to 4.5 percent of Ti, and the balance of Ti.
And S120, brushing high-temperature-resistant antioxidant coatings on the surfaces of the TB8 titanium alloy slabs, and heating the TB8 titanium alloy slabs brushed with the antioxidant coatings.
In the present exemplary embodiment, in the above heat treatment, the rolled billet structure is homogenized by heating at a temperature of 130 to 200 ℃ or higher than the transformation point, and the structure of each part is homogenized, and the TB8 titanium alloy structure at this temperature is a β -phase structure, which has a small deformation resistance and is advantageous for deformation processing, and the reasonable control of the heating time can avoid the occurrence of excessively large crystal grains.
And S130, respectively rolling each TB8 titanium alloy plate blank subjected to heating treatment at one fire to obtain a plurality of once-rolled titanium alloy plate materials.
In the embodiment of the invention, the deformation rate of the one-shot rolling is not less than 60%, the rolling temperature is 700-900 ℃, the holding time is 30-60 min, the pass deformation is 8-20%, and the titanium alloy plate with the thickness of 5-9 mm is obtained after air cooling.
And S140, overlapping the once-rolled titanium alloy plates to form an overlapping assembly.
And S150, preheating the stacking assembly, carrying out two-fire rolling on the preheated stacking assembly, and splitting the stacking assembly subjected to the two-fire rolling to obtain a plurality of pretreated TB8 titanium alloy plates.
In the embodiment of the invention, the deformation rate of the two-fire rolling is not less than 50%, the rolling temperature is 900-1000 ℃, the holding time is 65-85 min, the pass deformation is 8-20%, and the titanium alloy plate with the thickness of 0.35-2.0 mm is obtained after air cooling.
And S160, carrying out argon-filled on-line continuous annealing treatment on each pretreated TB8 titanium alloy plate to obtain a TB8 titanium alloy plate with the thickness of 0.35-2.0 mm.
In the present exemplary embodiment, the titanium alloy sheet material of 0.35mm to 2.0mm tb8 obtained in step S160 is subjected to alkali pickling and repairing in sequence, so that the surface is bright and free of visible defects; then, the titanium alloy plate with the flatness less than or equal to 2mm/m is obtained through the working procedures of annealing and pressing leveling.
Wherein the annealing temperature is 650-850 ℃, and the heat preservation time is 50-120 min; in the pressure leveling procedure, the pressure leveling temperature is 600-750 ℃, and the heat preservation time is as follows: 2.5 to 3.5 hours.
Sequentially carrying out alkali pickling, sanding, coping, sanding, polishing and shearing on the prepared titanium alloy plate with the flatness of less than or equal to 2mm/m to obtain a TB8 titanium alloy plate with the thickness of 0.35-2.0 mm, wherein when the thickness delta of the TB8 titanium alloy plate is less than or equal to 1mm, the precision is 0-0.1 mm; when the thickness delta of the TB8 titanium alloy plate is more than 0.35 and less than or equal to 1mm, the precision is 0-0.2 mm; when the thickness delta of the titanium alloy plate is more than 1 and less than or equal to 2mm, the precision is 0-0.3 mm, and the roughness Ra of the TB8 titanium alloy plate is less than or equal to 3.2 mu m. And finally, inspecting and warehousing the TB8 titanium alloy plate by a finished product.
In the present exemplary embodiment, the method for preparing a TB8 titanium alloy plate disclosed in the embodiments of the present invention includes: obtaining a plurality of TB8 titanium alloy slabs; brushing high-temperature-resistant antioxidant paint on the surface of each TB8 titanium alloy plate blank, and heating the TB8 titanium alloy plate blank coated with the antioxidant paint; respectively rolling each TB8 titanium alloy plate blank subjected to heat treatment at one fire to obtain a plurality of once-rolled titanium alloy plate materials; superposing the once-rolled titanium alloy plate materials to form a superposed assembly; preheating the stacking assembly, carrying out two-fire rolling on the preheated stacking assembly, and splitting the stacking assembly subjected to the two-fire rolling to obtain a plurality of pretreated TB8 titanium alloy plates; and carrying out argon-filling on-line continuous annealing treatment on each pretreated TB8 titanium alloy plate to obtain a TB8 titanium alloy plate with the thickness of 0.35-2.0 mm. According to the preparation method, the plurality of TB8 titanium alloy slabs are respectively rolled in one fire, and then the TB8 titanium alloy slabs which are rolled in one fire are overlapped to be rolled in two fires, so that the stress between the TB8 titanium alloy slabs is uniform, and the consistency of the finished TB8 titanium alloy plates can be effectively improved.
In the present exemplary embodiment, as shown in fig. 2, it can be seen from fig. 2 that the TB8 titanium alloy sheet material manufactured by the present invention has better uniformity.
In one specific embodiment, the method comprises the step of heating the TB8 titanium alloy plate blank coated with the antioxidant coating, wherein the heating temperature is 800-.
In a specific embodiment, the one-shot rolling is unidirectional rolling, and the deformation rate of the one-shot rolling is not less than 60%.
In a specific embodiment, the two-heat rolling is bidirectional rolling, and the deformation rate of the two-heat rolling is not less than 50%.
In one embodiment, the step of stacking each of the once-rolled titanium alloy sheet materials to form a stack assembly comprises:
and respectively coating isolation coatings on the plate surfaces of the once-rolled titanium alloy plate materials.
In a specific embodiment, before the step of performing argon-filling on-line continuous annealing treatment on each pretreated TB8 titanium alloy sheet material to obtain a TB8 titanium alloy sheet material with the thickness of 0.35 mm-2.0 mm, the method further comprises the following steps:
and (4) uncoiling, cutting to length, leveling in an earth furnace and performing surface finishing on the pretreated TB8 titanium alloy plate.
In one embodiment, the step of surface finishing processing, namely flat grinding and sanding, comprises the following steps:
fixing a vacuum chuck on a flat grinding reference platform in advance, ensuring that the upper reference surface of the vacuum chuck is kept horizontal, and paving a rectangular sealing rubber strip in a grid gap belt of the upper reference surface of the chuck according to the length and width of the titanium alloy plate close to the pretreated TB 8;
placing the pre-treated TB8 titanium alloy plate after being subjected to pressure leveling in the ground furnace on the reference surface of a vacuum chuck, ensuring that the sealing rubber strips are completely covered, keeping four sides equidistant, starting the vacuum chuck to work, evacuating to the maximum adsorption force, and completely adsorbing and compacting the pre-treated TB8 titanium alloy plate after being subjected to pressure leveling in the ground furnace and the reference surface;
starting a flat grinding machine, carrying out flat grinding cutting processing on the surface of the pretreated TB8 titanium alloy plate subjected to leveling by the grinding wheel according to different material consumption rates, and adopting automatic compensation of feeding of the grinding wheel of the grinding machine in the grinding process to ensure that the actual grinding amount of each flat grinding of each surface of the acid-washed cold-rolled coil blank subjected to leveling by the ground furnace pressure is consistent, wherein the grinding amount is 0.3-0.4 mm, the single grinding amount is 0.04mm, the grinding frequency is not more than 10 times, and the grinding speed is 1 min/time, so as to obtain a pretreated TB8 titanium alloy plate subjected to flat grinding;
adjusting the gap of the abrasive belt machine to the thickness of the TB8 titanium alloy plate in advance;
sanding is sequentially carried out according to the sequence of (240 meshes-320 meshes) - (400 meshes-600 meshes) - (800 meshes-1000 meshes) - (1200 meshes-2000 meshes), each surface of the TB8 titanium alloy plate after flat grinding is sanded twice by adopting the same abrasive belt, and the sanding standard is as follows: the surface smoothness reaches Ra less than or equal to 0.3 mu m.
In one embodiment, before the step of preheating the stack and the step of two-fire rolling the preheated stack, the method further comprises:
and respectively covering flexible cover plates on the upper surface and the lower surface of the titanium superposed assembly.
In one embodiment, the parameters of the one-shot rolling are as follows: the temperature is 900 ℃ and 950 ℃, the temperature is kept for 5-10 min, the rolling speed is 2-4 m/s, and the rolling mode is forward-length rolling.
In one embodiment, the parameters of the two-fire rolling are as follows: 1200 and 1250 ℃, the temperature is kept for 15 to 20min, the rolling speed is 0.5 to 1m/s, and the rolling mode is the down-length rolling.
It should be noted that the above-described embodiments are only some of the claimed embodiments, and not all of the claimed embodiments. All other embodiments, which can be derived by one of ordinary skill in the art from the embodiments in the application without any creative effort, shall fall within the scope of protection of the application. In the present specification, each embodiment is described with emphasis on differences from other embodiments, and the same and similar parts between the embodiments may be referred to each other.
Claims (10)
1. A preparation method of a TB8 titanium alloy plate is characterized by comprising the following steps:
obtaining a plurality of TB8 titanium alloy plate blanks;
brushing high-temperature-resistant antioxidant paint on the surface of each TB8 titanium alloy plate blank, and heating the TB8 titanium alloy plate blank coated with the antioxidant paint;
respectively rolling each TB8 titanium alloy plate blank subjected to heat treatment at one fire to obtain a plurality of once-rolled titanium alloy plate materials;
superposing the once-rolled titanium alloy plate materials to form a superposed assembly;
preheating the superposed assembly, carrying out two-fire rolling on the preheated superposed assembly, and splitting the superposed assembly subjected to the two-fire rolling to obtain a plurality of preprocessed TB8 titanium alloy plates;
and carrying out argon-filling on-line continuous annealing treatment on each pretreated TB8 titanium alloy plate to obtain a TB8 titanium alloy plate with the thickness of 0.35-2.0 mm.
2. The method for preparing the TB8 titanium alloy plate as claimed in claim 1, wherein the TB8 titanium alloy plate blank coated with the anti-oxidation coating is subjected to a heating treatment at a temperature of 800-1000 ℃.
3. The preparation method of the TB8 titanium alloy plate according to claim 1, wherein the one-shot rolling is unidirectional rolling, and the deformation rate of the one-shot rolling is not less than 60%.
4. The preparation method of the TB8 titanium alloy plate according to claim 1, wherein the two-fire rolling is bidirectional rolling, and the deformation rate of the two-fire rolling is not less than 50%.
5. The method of making TB8 titanium alloy sheet material of claim 1, wherein the step of stacking each of said once-rolled titanium alloy sheet material to form a stack assembly comprises:
and respectively coating isolation coatings on the plate surfaces of the once-rolled titanium alloy plate materials.
6. The method for preparing TB8 titanium alloy plates according to claim 1, wherein before the step of argon-filling on-line continuous annealing treatment of each pretreated TB8 titanium alloy plate to obtain a TB8 titanium alloy plate with the thickness of 0.35-2.0 mm, the method further comprises the following steps:
and (4) uncoiling, cutting to length, leveling in an earth furnace and performing surface finishing on the pretreated TB8 titanium alloy plate.
7. The preparation method of the TB8 titanium alloy plate as claimed in claim 6, wherein the surface finishing step of flat grinding and sanding comprises the following steps:
fixing a vacuum chuck on a flat grinding reference platform in advance, ensuring that the upper reference surface of the vacuum chuck is kept horizontal, and paving a rectangular sealing rubber strip in a grid gap belt of the upper reference surface of the chuck according to the length and width of the titanium alloy plate close to the pretreated TB 8;
placing the pre-treated TB8 titanium alloy plate after being subjected to pressure leveling in the ground furnace on the reference surface of a vacuum chuck, ensuring that the sealing rubber strips are completely covered, keeping four sides equidistant, starting the vacuum chuck to work, evacuating to the maximum adsorption force, and completely adsorbing and compacting the pre-treated TB8 titanium alloy plate after being subjected to pressure leveling in the ground furnace and the reference surface;
starting a flat grinding machine, carrying out flat grinding cutting processing on the surface of the pretreated TB8 titanium alloy plate subjected to leveling by the grinding wheel according to different material consumption rates, and adopting automatic compensation of feeding of the grinding wheel of the grinding machine in the grinding process to ensure that the actual grinding amount of each flat grinding of each surface of the acid-washed cold-rolled coil blank subjected to leveling by the ground furnace pressure is consistent, wherein the grinding amount is 0.3-0.4 mm, the single grinding amount is 0.04mm, the grinding frequency is not more than 10 times, and the grinding speed is 1 min/time, so as to obtain a pretreated TB8 titanium alloy plate subjected to flat grinding;
adjusting the gap of the abrasive belt machine to the thickness of the TB8 titanium alloy plate in advance;
sanding is sequentially carried out according to the sequence of (240 meshes-320 meshes) - (400 meshes-600 meshes) - (800 meshes-1000 meshes) - (1200 meshes-2000 meshes), each surface of the TB8 titanium alloy plate after flat grinding is sanded twice by adopting the same abrasive belt, and the sanding standard is as follows: the surface smoothness reaches Ra less than or equal to 0.3 mu m.
8. The method of making TB8 titanium alloy sheet material according to claim 1, wherein before the steps of preheating the stack and two-fire rolling the preheated stack, the method further comprises:
and the upper surface and the lower surface of the superposed assembly are respectively covered with flexible cover plates.
9. The preparation method of the TB8 titanium alloy sheet material according to claim 1, wherein the parameters of the one-fire rolling are as follows: the temperature is 900 ℃ and 950 ℃, the temperature is kept for 5-10 min, the rolling speed is 2-4 m/s, and the rolling mode is forward-length rolling.
10. The preparation method of the TB8 titanium alloy plate according to claim 1, wherein the parameters of the double-fire rolling are as follows: 1200 and 1250 ℃, the temperature is kept for 15 to 20min, the rolling speed is 0.5 to 1m/s, and the rolling mode is the down-length rolling.
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| CN114101556A (en) * | 2021-09-30 | 2022-03-01 | 中国航发北京航空材料研究院 | Processing method for preparing TB8 titanium alloy sheet in short process |
| CN114226457A (en) * | 2021-12-16 | 2022-03-25 | 西部钛业有限责任公司 | Rolling method of Ti60 high-temperature titanium alloy plate |
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| CN111394615A (en) * | 2020-04-22 | 2020-07-10 | 西安圣泰金属材料有限公司 | Medical high-performance TA3G pure titanium plate and preparation method thereof |
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