CN102489507A - Preparation method for titanium alloy wide sheet - Google Patents
Preparation method for titanium alloy wide sheet Download PDFInfo
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- CN102489507A CN102489507A CN2011104156528A CN201110415652A CN102489507A CN 102489507 A CN102489507 A CN 102489507A CN 2011104156528 A CN2011104156528 A CN 2011104156528A CN 201110415652 A CN201110415652 A CN 201110415652A CN 102489507 A CN102489507 A CN 102489507A
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Abstract
The invention discloses a preparation method for a titanium alloy wide sheet, comprising the following steps of: step 1, stacking 4-6 titanium alloy plates, as well as coating and welding the titanium alloy plates into a stacked-rolled pack; step 2, rolling the stacked-rolled pack in the step 1 by a 2800-mm four-roll reversible hot-rolling unit; step 3, performing stress relief annealing on the rolled stacked-rolled pack, and then shearing and unpacking the annealed stacked-rolled pack to obtain a titanium alloy sheet in a thickness of 1.0-2.5 mm; and step 4, performing sharpening treatment on the surface of the titanium alloy sheet, then cold-rolling the sharpened titanium alloy sheet by a 1780-mm six-roll reversible cold-rolling unit, and finally machining the cold-rolled titanium alloy sheet to obtain a titanium alloy wide sheet in a thickness of 0.6-2.0 mm and in a width of 1000-1500 mm. The preparation method for a titanium alloy wide sheet disclosed by the invention combines coating and stacking-rolling with cold-rolling; and the surface of the prepared titanium alloy sheet is a cold-rolled surface uniform in structure and good in quality.
Description
Technical field
The invention belongs to technical field of board processing, be specifically related to a kind of preparation method of titanium alloy wide cut thin plate.
Background technology
Along with the development of industrial technologies such as Aeronautics and Astronautics and boats and ships, the requirement of titanium alloy wide cut thin plate is strengthened day by day.Thickness commonly used at present is no more than 1000mm less than 4mm titanium alloy plate, width.The processing method of existing titanium alloy plate has been not suitable for the processing of wide cut thin plate.The wide cut thin plate here be meant thickness at 0.6mm～2.0mm, width in 1000mm～1500mm scope.
Summary of the invention
Technical problem to be solved by this invention is the deficiency to above-mentioned prior art, and it is 0.6mm～2.0mm that a kind of thickness is provided, and width is the preparation method of the titanium alloy wide cut thin plate of 1000mm～1500mm.This method combines to coat ply rolling and cold rolling, and the titanium-alloy thin-plate surface of preparation is cold rolling surface, even tissue, and surface quality is good.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of preparation method of titanium alloy wide cut thin plate is characterized in that this method may further comprise the steps:
Step 1, be 5mm～10mm with 4～6 thickness, width is that the titanium alloy sheet of 1000mm～1500mm is stacked together, and clad welded becomes the ply rolling bag;
Step 2, adopt the four roller reversible hot milling roll groups of 2800mm, the beginning roll temperature be under 880 ℃～950 ℃ the condition to the bag of ply rolling described in step 1 repeat-rolling 6～12 passages, rolling total deformation is not less than 60%;
Step 3, the ply rolling bag after rolling in the step 2 is carried out stress relief annealing, the ply rolling bag after will annealing is then sheared and is opened bag, obtains the titanium-alloy thin-plate that thickness is 1.0mm～2.5mm;
Step 4, reconditioning is carried out on the surface of titanium-alloy thin-plate described in the step 3 handle to be removed surface scale; It is cold rolling that the six roller reversable cold-rolling machine groups that adopt 1780mm are then carried out 15～30 passages to the titanium-alloy thin-plate of removing surface scale; At last the titanium-alloy thin-plate after cold rolling is carried out machined; Obtaining thickness is 0.6mm～2.0mm, and width is the titanium alloy wide cut thin plate of 1000mm～1500mm; Said cold rolling pass deformation is not more than 5%, and cold rolling total deformation is not less than 15%.
The preparation method of above-mentioned a kind of titanium alloy wide cut thin plate; The method of the ply rolling of clad welded described in step 1 bag is: at every titanium alloy sheet upper surface and the even coating thickness of lower surface is the inoxidzable coating of 0.03mm～0.07mm; Then the titanium alloy sheet of 4～6 coating inoxidzable coatings is stacked together and forms the titanium alloy stacking; Then respectively place a slice steel plate, and the weldable steel bar shaped becomes the ply rolling bag between two steel plates at the upper surface and the lower surface of titanium alloy stacking.
The preparation method of above-mentioned a kind of titanium alloy wide cut thin plate all places heat-preservation cotton to prevent welding fluid inflow pollution titanium alloy sheet along rolling direction at the head and the afterbody of titanium alloy stacking before the said welding steel bar.
The preparation method of above-mentioned a kind of titanium alloy wide cut thin plate, said weldable steel bar shaped is bored two pores along rolling direction respectively at the head and the afterbody of ply rolling bag after becoming the ply rolling bag.
The preparation method of above-mentioned a kind of titanium alloy wide cut thin plate, the distance between two pores of said ply rolling packet header is 30mm～50mm, the distance between two pores of ply rolling bag afterbody is 30mm～50mm.
The preparation method of above-mentioned a kind of titanium alloy wide cut thin plate, rolling finishing temperature all is not less than 800 ℃ described in the step 2.
The preparation method of above-mentioned a kind of titanium alloy wide cut thin plate, the system of stress relief annealing described in the step 3 is: annealing temperature is 750 ℃～850 ℃, and temperature retention time is 1h～2.5h.
The present invention compared with prior art has the following advantages:
1, method of the present invention is simple, and processing ease is prone to realize suitability for industrialized production.
2, adopting method of the present invention can process thickness is 0.6mm～2.0mm, and width is the titanium alloy wide cut thin plate of 1000mm～1500mm, has filled up the blank of existing product, also can be used for the processing of existing size titanium or titanium alloy thin plate.
3, the present invention combines to coat ply rolling and cold rolling, and the titanium-alloy thin-plate surface of preparation is cold rolling surface, even tissue, and surface quality is good.
Through embodiment, technical scheme of the present invention is done further detailed description below.
The specific embodiment
Embodiment 1
Step 1, be 5mm with 4 thickness, width is 1200mm, and length is that TC4 (Ti-6Al-4V) titanium alloy sheet of 1000mm is stacked together, and clad welded becomes the ply rolling bag; The method of said clad welded ply rolling bag is: at every titanium alloy sheet upper surface and the even coating thickness of lower surface is the inoxidzable coating (zirconia coating) of 0.05mm; Then the titanium alloy sheet of 4 coating inoxidzable coatings is stacked together and forms the titanium alloy stacking; Then respectively placing a slice thickness at the upper surface of titanium alloy stacking and lower surface is that 20mm, width are that 1320mm, length are the steel plate of 1120mm; And the weldable steel bar shaped becomes the ply rolling bag between two steel plates; All place heat-preservation cotton to prevent welding fluid inflow pollution titanium alloy sheet along rolling direction at the head and the afterbody of titanium alloy stacking before the welding steel bar; At last bore two pores along rolling direction respectively at the head and the afterbody of ply rolling bag, the distance between two pores of ply rolling packet header is 40mm, and the distance between two pores of ply rolling bag afterbody is 40mm;
The four roller reversible hot milling roll groups of step 2, employing 2800mm; Rolling temperature in the beginning is to the bag of ply rolling described in step 1 repeat-rolling 12 passages under 950 ℃ the condition; Each pass deformation is followed successively by: 10%, 17%, 18%, 22%, 17%, 17%, 15%, 12%, 7%, 7%, 2% and 4%; Total deformation 80%, finishing temperature are not less than 800 ℃;
Step 3, the ply rolling bag after rolling in the step 2 is carried out stress relief annealing, the ply rolling bag after will annealing is then sheared and is opened bag, obtains the titanium-alloy thin-plate that thickness is 1.0mm; The system of said stress relief annealing is: annealing temperature is 850 ℃, and temperature retention time is 1h;
Step 4, reconditioning is carried out on the surface of titanium-alloy thin-plate described in the step 3 handle to be removed surface scale; It is cold rolling that the six roller reversable cold-rolling machine groups that adopt 1780mm are then carried out 30 passages to the titanium-alloy thin-plate of removing surface scale; Each pass deformation is followed successively by: 5%, 4.5%, 4.3%, 3.8%, 3.4%, 3.2%, 2.8%, 1.8%, 1.6%, 1.5%, 1.4%, 1.3%, 1.2%, 1.2%, 1.1%, 1%, 1%, 1%, 0.9%, 0.8%, 0.8%, 0.8%, 0.8%, 0.8%, 0.8%, 0.7%, 0.7%, 0.7%, 0.7% and 0.7%; Total deformation 40%; At last to the titanium-alloy thin-plate after cold rolling through oil removing, heat treatment, pickling, plate shearing machine be cut to scale, survey microstructure and property, finishing is orthopedic, sandblast, washing, flaw detection, water cutting; It is good finally to obtain surface quality; Thickness is 0.6mm, and width is 1200mm, and length is the titanium alloy wide cut thin plate of 3000mm.
Present embodiment combines to coat ply rolling and cold rolling, and the titanium-alloy thin-plate surface of preparation is cold rolling surface, even tissue, and surface quality is good.
Embodiment 2
Step 1, be 10mm with 6 thickness, width is 1500mm, and length is that TC4 (Ti-6Al-4V) titanium alloy sheet of 1000mm is stacked together, and clad welded becomes the ply rolling bag; The method of said clad welded ply rolling bag is: at every titanium alloy sheet upper surface and the even coating thickness of lower surface is the inoxidzable coating (glass-based high-temp antioxidizing paint) of 0.03mm; Then the titanium alloy sheet of 6 coating inoxidzable coatings is stacked together and forms the titanium alloy stacking; Then respectively placing a slice thickness at the upper surface of titanium alloy stacking and lower surface is that 60mm, width are that 1640mm, length are the steel plate of 1140mm; And the weldable steel bar shaped becomes the ply rolling bag between two steel plates; All place heat-preservation cotton to prevent welding fluid inflow pollution titanium alloy sheet along rolling direction at the head and the afterbody of titanium alloy stacking before the welding steel bar; At last bore two pores respectively at the head and the afterbody of ply rolling bag along rolling direction; Distance between two pores of ply rolling packet header is 50mm, and the distance between two pores of ply rolling bag afterbody is 50mm;
The four roller reversible hot milling roll groups of step 2, employing 2800mm; Rolling temperature in the beginning is to the bag of ply rolling described in step 1 repeat-rolling 10 passages under 900 ℃ the condition; Each pass deformation is followed successively by: 10%, 16%, 18%, 16%, 15%, 14%, 13%, 11%, 7% and 8%; Total deformation 75%, finishing temperature are not less than 800 ℃;
Step 3, the ply rolling bag after rolling in the step 2 is carried out stress relief annealing, the ply rolling bag after will annealing is then sheared and is opened bag, obtains the titanium-alloy thin-plate that thickness is 2.5mm; The system of said stress relief annealing is: annealing temperature is 750 ℃, and temperature retention time is 2.5h;
Step 4, reconditioning is carried out on the surface of titanium-alloy thin-plate described in the step 3 handle to be removed surface scale; It is cold rolling that the six roller reversable cold-rolling machine groups that adopt 1780mm are then carried out 15 passages to the titanium-alloy thin-plate of removing surface scale; Each pass deformation is followed successively by: 4%, 4%, 2%, 2%, 1.5%, 1.3%, 0.9%, 0.9%, 0.9%, 0.5%, 0.5%, 0.5%, 0.5%, 0.5% and 0.5%; Total deformation 20%; At last to the titanium-alloy thin-plate after cold rolling through oil removing, heat treatment, pickling, plate shearing machine be cut to scale, survey microstructure and property, finishing is orthopedic, sandblast, washing, flaw detection, water cutting, it is good finally to obtain surface quality, thickness is 2.0mm; Width is 1500mm, and length is the titanium alloy wide cut thin plate of 3000mm.
Present embodiment combines to coat ply rolling and cold rolling, and the titanium-alloy thin-plate surface of preparation is cold rolling surface, even tissue, and surface quality is good.
Embodiment 3
Step 1, be 6mm with 5 thickness, width is 1000mm, and length is that TC3 (Ti-5Al-4V) titanium alloy sheet of 1200mm is stacked together, and clad welded becomes the ply rolling bag; The method of said clad welded ply rolling bag is: at every titanium alloy sheet upper surface and the even coating thickness of lower surface is the inoxidzable coating (zirconia coating) of 0.07mm; Then the titanium alloy sheet of 5 coating inoxidzable coatings is stacked together and forms the titanium alloy stacking; Then respectively placing a slice thickness at the upper surface of titanium alloy stacking and lower surface is that 30mm, width are that 1130mm, length are the steel plate of 1330mm; And the weldable steel bar shaped becomes the ply rolling bag between two steel plates; All place heat-preservation cotton to prevent welding fluid inflow pollution titanium alloy sheet along rolling direction at the head and the afterbody of titanium alloy stacking before the welding steel bar; At last bore two pores along rolling direction respectively at the head and the afterbody of ply rolling bag, the distance between two pores of ply rolling packet header is 30mm, and the distance between two pores of ply rolling bag afterbody is 30mm;
The four roller reversible hot milling roll groups of step 2, employing 2800mm; Rolling temperature in the beginning is to the bag of ply rolling described in step 1 repeat-rolling 6 passages under 880 ℃ the condition; Each pass deformation is followed successively by: 11%, 19%, 23%, 20%, 15% and 11%; Total deformation is 67%, and finishing temperature is not less than 800 ℃;
Step 3, the ply rolling bag after rolling in the step 2 is carried out stress relief annealing, the ply rolling bag after will annealing is then sheared and is opened bag, obtains the titanium-alloy thin-plate that thickness is 2.0mm; The system of said stress relief annealing is: annealing temperature is 800 ℃, and temperature retention time is 2h;
Step 4, reconditioning is carried out on the surface of titanium-alloy thin-plate described in the step 3 handle to be removed surface scale; It is cold rolling that the six roller reversable cold-rolling machine groups that adopt 1780mm are then carried out 16 passages to the titanium-alloy thin-plate of removing surface scale; Pass deformation is followed successively by: 5%, 4%, 3.4%, 2.6%, 2.2%, 1.9%, 1.5%, 1.4%, 0.8%, 0.8%, 0.8%, 0.6%, 0.6%, 0.6%, 0.6% and 0.6%; Total deformation 25%; At last to the titanium-alloy thin-plate after cold rolling through oil removing, heat treatment, pickling, plate shearing machine be cut to scale, survey microstructure and property, finishing is orthopedic, sandblast, washing, flaw detection, water cutting, it is good finally to obtain surface quality, thickness is 1.5mm; Width is 1000mm, and length is the titanium alloy wide cut thin plate of 2300mm.
Present embodiment combines to coat ply rolling and cold rolling, and the titanium-alloy thin-plate surface of preparation is cold rolling surface, even tissue, and surface quality is good.
Embodiment 4
Step 1, be 7mm with 4 thickness, width is 1400mm, and length is that TC3 (Ti-5Al-4V) titanium alloy sheet of 1000mm is stacked together, and becomes the ply rolling bag according to the conventional method clad welded;
The four roller reversible hot milling roll groups of step 2, employing 2800mm; Rolling temperature in the beginning is to the bag of ply rolling described in step 1 repeat-rolling 6 passages under 920 ℃ the condition; Each pass deformation is followed successively by: 12%, 20%, 25%, 23%, 9% and 3%; Total deformation 64%, finishing temperature are not less than 800 ℃;
Step 3, the ply rolling bag after rolling in the step 2 is carried out stress relief annealing, the ply rolling bag after will annealing is then sheared and is opened bag, obtains the titanium-alloy thin-plate that thickness is 2.5mm; The system of said stress relief annealing is: annealing temperature is 800 ℃, and temperature retention time is 2h;
Step 4, reconditioning is carried out on the surface of titanium-alloy thin-plate described in the step 3 handle to be removed surface scale; It is cold rolling that the six roller reversable cold-rolling machine groups that adopt 1780mm are then carried out 15 passages to the titanium-alloy thin-plate of removing surface scale; Each pass deformation is followed successively by: 4%, 3%, 3%, 3%, 2%, 1.9%, 1%, 0.9%, 0.5%, 0.4%, 0.4%, 0.4%, 0.4%, 0.4% and 0.4%; Total deformation 25%; At last to the titanium-alloy thin-plate after cold rolling through oil removing, heat treatment, pickling, plate shearing machine be cut to scale, survey microstructure and property, finishing is orthopedic, sandblast, washing, flaw detection, water cutting, it is good finally to obtain surface quality, thickness is 2.0mm; Width is 1360mm, and length is the titanium alloy wide cut thin plate of 3000mm.
Present embodiment combines to coat ply rolling and cold rolling, and the titanium-alloy thin-plate surface of preparation is cold rolling surface, even tissue, and surface quality is good.
Embodiment 5
Step 1, be 5mm with 5 thickness, width is 1200mm, and length is that TC3 (Ti-5Al-4V) titanium alloy sheet of 1000mm is stacked together, and becomes the ply rolling bag according to the conventional method clad welded;
The four roller reversible hot milling roll groups of step 2, employing 2800mm; Rolling temperature in the beginning is to the bag of ply rolling described in step 1 repeat-rolling 6 passages under 880 ℃ the condition; Each pass deformation is followed successively by: 10%, 15%, 23%, 20%, 10% and 5%; Total deformation 60%, finishing temperature are not less than 800 ℃;
Step 3, the ply rolling bag after rolling in the step 2 is carried out stress relief annealing, the ply rolling bag after will annealing is then sheared and is opened bag, obtains the titanium-alloy thin-plate that thickness is 2.0mm; The system of said stress relief annealing is: annealing temperature is 780 ℃, and temperature retention time is 1.5h;
Step 4, reconditioning is carried out on the surface of titanium-alloy thin-plate described in the step 3 handle to be removed surface scale; It is cold rolling that the six roller reversable cold-rolling machine groups that adopt 1780mm are then carried out 20 passages to the titanium-alloy thin-plate of removing surface scale; Each pass deformation is followed successively by: 3%, 2.5%, 1.5%, 1.5%, 1%, 0.8%, 0.8%, 0.7%, 0.7%, 0.5%, 0.5%, 0.5%, 0.5%, 0.3%, 0.3%, 0.2%, 0.2%, 0.2%, 0.2% and 0.2%; Total deformation 15%; At last to the titanium-alloy thin-plate after cold rolling through oil removing, heat treatment, pickling, plate shearing machine be cut to scale, survey microstructure and property, finishing is orthopedic, sandblast, washing, flaw detection, water cutting, it is good finally to obtain surface quality, thickness is 1.7mm; Width is 1200mm, and length is the titanium alloy wide cut thin plate of 2000mm.
Present embodiment combines to coat ply rolling and cold rolling, and the titanium-alloy thin-plate surface of preparation is cold rolling surface, even tissue, and surface quality is good.
The above; It only is preferred embodiment of the present invention; Be not that the present invention is done any restriction, every according to inventing technical spirit to any simple modification, change and equivalent structure variation that above embodiment did, all still belong in the protection domain of technical scheme of the present invention.
Claims (7)
1. the preparation method of a titanium alloy wide cut thin plate is characterized in that, this method may further comprise the steps:
Step 1, be 5mm～10mm with 4～6 thickness, width is that the titanium alloy sheet of 1000mm～1500mm is stacked together, and clad welded becomes the ply rolling bag;
Step 2, adopt the four roller reversible hot milling roll groups of 2800mm, the beginning roll temperature be under 880 ℃～950 ℃ the condition to the bag of ply rolling described in step 1 repeat-rolling 6～12 passages, rolling total deformation is not less than 60%;
Step 3, the ply rolling bag after rolling in the step 2 is carried out stress relief annealing, the ply rolling bag after will annealing is then sheared and is opened bag, obtains the titanium-alloy thin-plate that thickness is 1.0mm～2.5mm;
Step 4, reconditioning is carried out on the surface of titanium-alloy thin-plate described in the step 3 handle to be removed surface scale; It is cold rolling that the six roller reversable cold-rolling machine groups that adopt 1780mm are then carried out 15～30 passages to the titanium-alloy thin-plate of removing surface scale; At last the titanium-alloy thin-plate after cold rolling is carried out machined; Obtaining thickness is 0.6mm～2.0mm, and width is the titanium alloy wide cut thin plate of 1000mm～1500mm; Said cold rolling pass deformation is not more than 5%, and cold rolling total deformation is not less than 15%.
2. the preparation method of a kind of titanium alloy wide cut thin plate according to claim 1; It is characterized in that; The method of the ply rolling of clad welded described in step 1 bag is: at every titanium alloy sheet upper surface and the even coating thickness of lower surface is the inoxidzable coating of 0.03mm～0.07mm; Then the titanium alloy sheet of 4～6 coating inoxidzable coatings is stacked together and forms the titanium alloy stacking; Then respectively place a slice steel plate, and the weldable steel bar shaped becomes the ply rolling bag between two steel plates at the upper surface and the lower surface of titanium alloy stacking.
3. the preparation method of a kind of titanium alloy wide cut thin plate according to claim 2 is characterized in that, all places heat-preservation cotton to prevent welding fluid inflow pollution titanium alloy sheet along rolling direction at the head and the afterbody of titanium alloy stacking before the said welding steel bar.
4. the preparation method of a kind of titanium alloy wide cut thin plate according to claim 2 is characterized in that, said weldable steel bar shaped is bored two pores along rolling direction respectively at the head and the afterbody of ply rolling bag after becoming the ply rolling bag.
5. the preparation method of a kind of titanium alloy wide cut thin plate according to claim 4 is characterized in that, the distance between two pores of said ply rolling packet header is 30mm～50mm, and the distance between two pores of ply rolling bag afterbody is 30mm～50mm.
6. the preparation method of a kind of titanium alloy wide cut thin plate according to claim 1 is characterized in that, rolling finishing temperature all is not less than 800 ℃ described in the step 2.
7. the preparation method of a kind of titanium alloy wide cut thin plate according to claim 1 is characterized in that, the system of stress relief annealing described in the step 3 is: annealing temperature is 750 ℃～850 ℃, and temperature retention time is 1h～2.5h.
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