CN102873097A - Method for preventing cracking and slag falling of head and tail of titanium-alloy plate in cold rolling process - Google Patents

Method for preventing cracking and slag falling of head and tail of titanium-alloy plate in cold rolling process Download PDF

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Publication number
CN102873097A
CN102873097A CN2012104290998A CN201210429099A CN102873097A CN 102873097 A CN102873097 A CN 102873097A CN 2012104290998 A CN2012104290998 A CN 2012104290998A CN 201210429099 A CN201210429099 A CN 201210429099A CN 102873097 A CN102873097 A CN 102873097A
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Prior art keywords
alloy plate
titanium
titanium alloy
sheet material
cold
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Inventor
付文杰
王瑞琴
王兴
吴晓东
党鹏
高维娜
张清
李辉
叶红川
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WESTERN TITANIUM TECHNOLOGIES Co Ltd
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WESTERN TITANIUM TECHNOLOGIES Co Ltd
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Priority to CN2012104290998A priority Critical patent/CN102873097A/en
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Abstract

The invention discloses a method for preventing the cracking and the slag falling of the head and the tail of a titanium-alloy plate in the cold rolling process. The method comprises the following steps of: before carrying out cold rolling, respectively welding two pure titanium plates of which the sections are of a trapezoid shape and the thicknesses are the same with that of the titanium-alloy plate at both the head and tail ends of the titanium-alloy plate, wherein the lower bottom edges of the pure titanium plates are welded together with the titanium-alloy plate, the length of the lower bottom edge of each trapezoid is the same with the width of the titanium-alloy plate, the height of each trapezoid is 50mm to 100mm and both interior angles of the lower bottom edge of each trapezoid are 60 degrees to 70 degrees; and before welding, polishing the sharp corners of the pure titanium plates, which are far away from the titanium-alloy plate, smooth. The method disclosed by the invention is easy to control and is simple and convenient to operate; the cold rolling is carried out by adopting a mode of welding the pure titanium plates at the head and the tail of the titanium-alloy plate; pure titanium is easier to deform than titanium alloy, so that in the cold rolling process, the problems of cracking and slag falling of the head and the tail of the titanium-alloy plate is effectively prevented, the rolling yield is improved and the surface quality of the rolled titanium-alloy plate is also greatly improved.

Description

A kind of method that prevents that titanium alloy plate ftractures end to end in the cold-rolled process, falls slag
Technical field
The invention belongs to the titanium alloy plate preparing technical field, be specifically related to a kind of method that prevents that titanium alloy plate ftractures end to end in the cold-rolled process, falls slag.
Background technology
Titanium alloy not only has less density, good room temperature, high temperature, cryogenic mechanics performance, and in medium, has excellent corrosion resistance, can weld, the series of advantages such as cold/hot shaped, so at Aero-Space, petrochemical industry, shipbuilding, automobile, the application that the departments such as medicine all succeed.Along with the development of the industrial technologies such as Aeronautics and Astronautics and boats and ships, the demand of titanium-alloy thin-plate is increased day by day.Because the titanium alloy resistance of deformation is large, is prone to cracking during cold rolling, falls the phenomenon of slag, thereby make plate surface the defectives such as pit, slag inclusion occur, has a strong impact on the surface quality of finished product, lumber recovery also reduces greatly simultaneously.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned the deficiencies in the prior art, provides a kind of and prevent that titanium alloy plate ftractures end to end in the cold-rolled process, falls the method for slag.The method is easy to control, simple to operation, employing is carried out cold rolling to the mode of welding end to end pure titanium sheet material of titanium alloy plate, because pure titanium is easily deformable compared to titanium alloy, prevented effectively in the cold-rolled process that titanium alloy plate from ftractureing, falling the problem of slag end to end, improved lumber recovery, rolling titanium alloy sheet surface quality also is greatly improved.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of method that prevents that titanium alloy plate ftractures end to end in the cold-rolled process, falls slag, it is characterized in that, the method is: respectively to weld a cross section be trapezoidal at two ends end to end at titanium alloy plate before cold rolling, the pure titanium sheet material that thickness is identical with titanium alloy plate thickness, wherein the bottom of pure titanium sheet material and titanium alloy plate weld together; Described trapezoidal bottom length is identical with the width of titanium alloy plate, and trapezoidal height is 50mm～100mm, and two interior angles of trapezoidal bottom are 60 °～70 °; Before the described welding that pure titanium sheet material is round and smooth away from the sharp corner reconditioning of titanium alloy plate.
Above-mentioned a kind of method that prevents that titanium alloy plate ftractures end to end in the cold-rolled process, falls slag, the trade mark of described titanium alloy plate is TC1, TC2, TC4 or TA15.
Above-mentioned a kind of method that prevents that titanium alloy plate ftractures end to end in the cold-rolled process, falls slag, the thickness of described titanium alloy plate is 3mm～6mm.
Above-mentioned a kind of method that prevents that titanium alloy plate ftractures end to end in the cold-rolled process, falls slag, the state of described titanium alloy plate is annealed state.
Above-mentioned a kind of method that prevents that titanium alloy plate ftractures end to end in the cold-rolled process, falls slag, the trade mark of described pure titanium sheet material is TA1 or TA2.
Above-mentioned a kind of method that prevents that titanium alloy plate ftractures end to end in the cold-rolled process, falls slag, the state of described pure titanium sheet material is As rolled.
Above-mentioned a kind of method that prevents that titanium alloy plate ftractures end to end in the cold-rolled process, falls slag, the welding method between described titanium alloy plate and the pure titanium sheet material is argon arc welding.
The present invention compared with prior art has the following advantages:
1, the present invention adopts and carries out cold rolling to the mode of welding end to end pure titanium sheet material of titanium alloy plate, because pure titanium is easily deformable compared to titanium alloy, prevented effectively in the cold-rolled process that titanium alloy plate from ftractureing, falling the problem of slag end to end, improved lumber recovery, rolling titanium alloy sheet surface quality also is greatly improved.
2, the present invention adopts the titanium alloy plate welding of the pure titanium sheet material of As rolled and annealed state, reduces both difference of hardness, can prevent because the excessive damage that causes equipment of roll-force fluctuation when cold rolling, and be conducive to control panel shape.
3, method of the present invention is easy to control, and is simple to operation.
Below in conjunction with drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is the structural representation after titanium alloy plate of the present invention and the welding of pure titanium sheet material.
Description of reference numerals:
1-titanium alloy plate; 2-pure titanium sheet material.
The specific embodiment
Embodiment 1
TC4 titanium-alloy thin-plate rolling:
Step 1, will to need cold rolling thickness with plate shearing machine be 5mm, and width is that the end to end shearing of annealed state TC4 titanium alloy plate 1 of 1300mm is clean;
Step 2, be that to cut into length along rolling direction be 1300mm for the pure titanium sheet material of As rolled TA2 of 5mm with thickness, width is the pure titanium sheet material 2 of 80mm, then pure titanium sheet material 2 both sides are cut into 65 ° oblique angle, forming cross section is the pure titanium sheet material of isosceles trapezoid, with Handheld grinding machine that the sharp corner reconditioning on base on the pure titanium sheet material 2 is round and smooth; The bottom of described isosceles trapezoid is 1300mm, and the height of isosceles trapezoid is 80mm, and two interior angles of the bottom of isosceles trapezoid are 65 °;
Structure as shown in Figure 1 after the pure titanium sheet material 2(welding after round and smooth of reconditioning in the step 2 was respectively welded at step 3, the end to end two ends of adopting argon arc welding to shear end to end clean TC4 titanium alloy plate 1 in step 1);
Step 4, the TC4 titanium alloy plate 1 that is welded with pure titanium sheet material 2 in the step 3 sent into carry out the cold rolling of two rolling processes in the cold-rolling mill, first cold rolling journey is rolling to 3.4mm by thickness of slab 5mm, total deformation rate is 32%, single pass heavy deformation is not more than 0.25mm, then carry out intermediate annealing at 800 ℃, second cold rolling journey is rolling to 2.5mm by thickness of slab 3.4mm, total deformation rate is 26.5%, single pass heavy deformation is not more than 0.2mm, excision is the pure titanium sheet material 2 of welding end to end, and finally obtaining thickness is the cold rolling TC4 titanium-alloy thin-plate of 2.5mm.
The present embodiment adopts and carries out cold rolling to the mode of welding end to end pure titanium sheet material of titanium alloy plate, because pure titanium is easily deformable compared to titanium alloy, prevented effectively in the cold-rolled process that titanium alloy plate from ftractureing, falling the problem of slag end to end, improved lumber recovery, the defectives such as pit, slag inclusion do not appear in rolling titanium-alloy thin-plate surface, and surface quality is higher.
Embodiment 2
TC2 titanium-alloy thin-plate rolling:
Step 1, will to need cold rolling thickness with plate shearing machine be 6mm, and width is that the end to end shearing of annealed state TC2 titanium alloy plate 1 of 1200mm is clean;
Step 2, be that to cut into length along rolling direction be 1200mm for the pure titanium sheet material of As rolled TA1 of 6mm with thickness, width is the pure titanium sheet material 2 of 50mm, then pure titanium sheet material 2 both sides are cut into 70 ° oblique angle, forming cross section is the pure titanium sheet material 2 of isosceles trapezoid, with Handheld grinding machine that the sharp corner reconditioning on base on the pure titanium sheet material 2 is round and smooth; The bottom of described isosceles trapezoid is 1200mm, and the height of isosceles trapezoid is 50mm, and two interior angles of the bottom of isosceles trapezoid are 70 °;
Structure as shown in Figure 1 after the pure titanium sheet material 2(welding after round and smooth of reconditioning in the step 2 was respectively welded at step 3, the end to end two ends of adopting argon arc welding to shear end to end clean TC2 titanium alloy plate 1 in step 1);
Step 4, the TC2 titanium alloy plate 1 that is welded with pure titanium sheet material 2 in the step 3 sent into carry out the cold rolling of two rolling processes in the cold-rolling mill, first cold rolling journey is rolling to 4mm by thickness of slab 6mm, total deformation rate is 33.3%, single pass heavy deformation is not more than 0.3mm, then carry out the centre stress relief annealing at 750 ℃, second cold rolling journey is by the rolling 3mm of thickness of slab 4mm, total deformation rate is 25%, single pass heavy deformation is not more than 0.25mm, excision is the pure titanium sheet material 2 of welding end to end, and finally obtaining thickness is the cold rolling TC2 titanium-alloy thin-plate of 3mm.
The present embodiment adopts and carries out cold rolling to the mode of welding end to end pure titanium sheet material of titanium alloy plate, because pure titanium is easily deformable compared to titanium alloy, prevented effectively in the cold-rolled process that titanium alloy plate from ftractureing, falling the problem of slag end to end, improved lumber recovery, the defectives such as pit, slag inclusion do not appear in rolling titanium-alloy thin-plate surface, and surface quality is higher.
Embodiment 3
TA15 titanium-alloy thin-plate rolling:
Step 1, will to need cold rolling thickness with plate shearing machine be 4mm, and width is that the end to end shearing of annealed state TA15 titanium alloy plate 1 of 1100mm is clean;
Step 2, be that to cut into length along rolling direction be 1100mm for the pure titanium sheet material of As rolled TA2 of 4mm with thickness, width is the pure titanium sheet material 2 of 100mm, then pure titanium sheet material 2 both sides are cut into 70 ° oblique angle, forming cross section is the pure titanium sheet material 2 of isosceles trapezoid, with Handheld grinding machine that the sharp corner reconditioning on base on the pure titanium sheet material 2 is round and smooth; The bottom of described isosceles trapezoid is 1100mm, and the height of isosceles trapezoid is 100mm, and two interior angles of the bottom of isosceles trapezoid are 70 °;
Structure as shown in Figure 1 after the pure titanium sheet material 2(welding after round and smooth of reconditioning in the step 2 was respectively welded at step 3, the end to end two ends of adopting argon arc welding to shear end to end clean TA15 titanium alloy plate 1 in step 1);
Step 4, the TA15 titanium alloy plate 1 that is welded with pure titanium sheet material 2 in the step 3 sent into carry out the cold rolling of two rolling processes in the cold-rolling mill, first cold rolling journey is rolling to 2.7mm by thickness of slab 4mm, total deformation rate is 32.5%, single pass heavy deformation is not more than 0.2mm, then carry out intermediate annealing at 830 ℃, second cold rolling journey is rolling to 2mm by thickness of slab 2.7mm, total deformation rate is 25.9%, single pass heavy deformation is not more than 0.18mm, excision is the pure titanium sheet material 2 of welding end to end, and finally obtaining thickness is the cold rolling TA15 titanium-alloy thin-plate of 2mm.
The present embodiment adopts and carries out cold rolling to the mode of welding end to end pure titanium sheet material of titanium alloy plate, because pure titanium is easily deformable compared to titanium alloy, prevented effectively in the cold-rolled process that titanium alloy plate from ftractureing, falling the problem of slag end to end, improved lumber recovery, the defectives such as pit, slag inclusion do not appear in rolling titanium-alloy thin-plate surface, and surface quality is higher.
Embodiment 4
TC4 titanium-alloy thin-plate rolling:
Step 1, will to need cold rolling thickness with plate shearing machine be 3mm, and width is that the end to end shearing of annealed state TC4 titanium alloy plate 1 of 1250mm is clean;
Step 2, be that to cut into length along rolling direction be 1250mm for the pure titanium sheet material of As rolled TA2 of 3mm with thickness, width is the pure titanium sheet material 2 of 50mm, then pure titanium sheet material 2 one sides are cut into 65 ° oblique angle, opposite side cuts into 70 ° oblique angle, forming cross section is trapezoidal pure titanium sheet material 2, with Handheld grinding machine that the sharp corner reconditioning on base on the pure titanium sheet material 2 is round and smooth; Described trapezoidal bottom is 1250mm, and trapezoidal height is 50mm, and two interior angles of trapezoidal bottom are respectively 65 ° and 70 °;
Structure as shown in Figure 1 after the pure titanium sheet material 2(welding after round and smooth of reconditioning in the step 2 was respectively welded at step 3, the end to end two ends of adopting argon arc welding to shear end to end clean TC4 titanium alloy plate 1 in step 1);
Step 4, the TC4 titanium alloy plate 1 that is welded with pure titanium sheet material 2 in the step 3 sent into carry out the cold rolling of three rolling processes in the cold-rolling mill, first cold rolling journey is rolling to 2mm by thickness of slab 3mm, total deformation rate is 33.3%, and single pass heavy deformation is not more than 0.25mm, then carries out intermediate annealing at 800 ℃; Second cold rolling journey is rolling to 1.5mm by thickness of slab 2mm, and total deformation rate is 25%, and single pass heavy deformation is not more than 0.2mm, again carries out the centre stress relief annealing; The 3rd cold rolling journey is rolling to 1.2mm by thickness of slab 1.5mm, and total deformation rate is 20%, and single pass heavy deformation is not more than 0.15mm, and excision is the pure titanium sheet material 2 of welding end to end, and finally obtaining thickness is the TC4 titanium-alloy thin-plate of 1.2mm.
The present embodiment adopts and carries out cold rolling to the mode of welding end to end pure titanium sheet material of titanium alloy plate, because pure titanium is easily deformable compared to titanium alloy, prevented effectively in the cold-rolled process that titanium alloy plate from ftractureing, falling the problem of slag end to end, improved lumber recovery, the defectives such as pit, slag inclusion do not appear in rolling titanium-alloy thin-plate surface, and surface quality is higher.
Embodiment 5
TC1 titanium-alloy thin-plate rolling:
Step 1, will to need cold rolling thickness with plate shearing machine be 3.5mm, and width is that the end to end shearing of annealed state TC1 titanium alloy plate 1 of 1400mm is clean;
Step 2, be that to cut into length along rolling direction be 1400mm for the pure titanium sheet material of As rolled TA1 of 3.5mm with thickness, width is the pure titanium sheet material 2 of 50mm, then pure titanium sheet material 2 one sides are cut into 60 ° oblique angle, opposite side cuts into 65 ° oblique angle, forming cross section is trapezoidal pure titanium sheet material 2, with Handheld grinding machine that the sharp corner reconditioning on base on the pure titanium sheet material 2 is round and smooth; Described trapezoidal bottom is 1400mm, and trapezoidal height is 50mm, and two interior angles of trapezoidal bottom are respectively 60 ° and 65 °;
Structure as shown in Figure 1 after the pure titanium sheet material 2(welding after round and smooth of reconditioning in the step 2 was respectively welded at step 3, the end to end two ends of adopting argon arc welding to shear end to end clean TC1 titanium alloy plate 1 in step 1);
Step 4, the TC1 titanium alloy plate 1 that is welded with pure titanium sheet material 2 in the step 3 sent into carry out the cold rolling of two rolling processes in the cold-rolling mill, first cold rolling journey is rolling to 2.2mm by thickness of slab 3.5mm, total deformation rate is 37.1%, single pass heavy deformation is not more than 0.3mm, then carry out intermediate annealing at 700 ℃, second cold rolling journey is rolling to 1.5mm by thickness of slab 2.2mm, total deformation rate is 31.8%, single pass heavy deformation is not more than 0.25mm, excision is the pure titanium sheet material 2 of welding end to end, and finally obtaining thickness is the cold rolling TC1 titanium-alloy thin-plate of 1.5mm.
The present embodiment adopts and carries out cold rolling to the mode of welding end to end pure titanium sheet material of titanium alloy plate, because pure titanium is easily deformable compared to titanium alloy, prevented effectively in the cold-rolled process that titanium alloy plate from ftractureing, falling the problem of slag end to end, improved lumber recovery, the defectives such as pit, slag inclusion do not appear in rolling titanium-alloy thin-plate surface, and surface quality is higher.
The above; it only is preferred embodiment of the present invention; be not that the present invention is done any restriction, every any simple modification, change and equivalent structure of above embodiment being done according to the invention technical spirit changes, and all still belongs in the protection domain of technical solution of the present invention.

Claims (7)

1. method that prevents that titanium alloy plate ftractures end to end in the cold-rolled process, falls slag, it is characterized in that, the method is: respectively to weld a cross section be trapezoidal at two ends end to end at titanium alloy plate (1) before cold rolling, the pure titanium sheet material (2) that thickness is identical with titanium alloy plate thickness, wherein the bottom of pure titanium sheet material (2) and titanium alloy plate (1) weld together; Described trapezoidal bottom length is identical with the width of titanium alloy plate (1), and trapezoidal height is 50mm～100mm, and two interior angles of trapezoidal bottom are 60 ° 70 °; Before the described welding that pure titanium sheet material (2) is round and smooth away from the sharp corner reconditioning of titanium alloy plate (1).
2. a kind of method that prevents that titanium alloy plate ftractures end to end in the cold-rolled process, falls slag according to claim 1 is characterized in that, the trade mark of described titanium alloy plate (1) is TC1, TC2, TC4 or TA15.
3. a kind of method that prevents that titanium alloy plate ftractures end to end in the cold-rolled process, falls slag according to claim 1 is characterized in that, the thickness of described titanium alloy plate (1) is 3mm～6mm.
4. a kind of method that prevents that titanium alloy plate ftractures end to end in the cold-rolled process, falls slag according to claim 1 is characterized in that, the state of described titanium alloy plate (1) is annealed state.
5. a kind of method that prevents that titanium alloy plate ftractures end to end in the cold-rolled process, falls slag according to claim 1 is characterized in that, the trade mark of described pure titanium sheet material (2) is TA1 or TA2.
6. a kind of method that prevents that titanium alloy plate ftractures end to end in the cold-rolled process, falls slag according to claim 1 is characterized in that, the state of described pure titanium sheet material (2) is As rolled.
7. a kind of method that prevents that titanium alloy plate ftractures end to end in the cold-rolled process, falls slag according to claim 1 is characterized in that, the welding method between described titanium alloy plate (1) and the pure titanium sheet material (2) is argon arc welding.
CN2012104290998A 2012-10-31 2012-10-31 Method for preventing cracking and slag falling of head and tail of titanium-alloy plate in cold rolling process Pending CN102873097A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114101329A (en) * 2021-11-26 2022-03-01 中色科技股份有限公司 Continuous cold rolling production method for single TC4 titanium alloy plate

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JPH02200303A (en) * 1989-01-31 1990-08-08 Nippon Steel Corp Cold rolling method for extremely thin titanium alloy sheet
CN2790619Y (en) * 2004-12-28 2006-06-28 西北有色金属研究院 Ply rolling pack for ply-rolling titanium alloy sheet
CN101011706A (en) * 2007-01-31 2007-08-08 哈尔滨工业大学 Method for composite preparation of Ti alloy/TiAl alloy composite plate material by using laminated rolling-diffusion method
US7776454B2 (en) * 2001-12-14 2010-08-17 EMS Solutions, Inc. Ti brazing strips or foils
CN201561195U (en) * 2009-12-15 2010-08-25 北京首宏钢科技开发有限公司 Tube blank for producing middle, large calibre alloy steel seamless steel tube on a skew tube rolling mill
CN202147445U (en) * 2011-06-20 2012-02-22 郝桂生 Structure of plate slab for rolling TC4 titanium alloy plate

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52120207A (en) * 1976-04-02 1977-10-08 Mitsubishi Metal Corp Powder rolling
JPH02200303A (en) * 1989-01-31 1990-08-08 Nippon Steel Corp Cold rolling method for extremely thin titanium alloy sheet
US7776454B2 (en) * 2001-12-14 2010-08-17 EMS Solutions, Inc. Ti brazing strips or foils
CN2790619Y (en) * 2004-12-28 2006-06-28 西北有色金属研究院 Ply rolling pack for ply-rolling titanium alloy sheet
CN101011706A (en) * 2007-01-31 2007-08-08 哈尔滨工业大学 Method for composite preparation of Ti alloy/TiAl alloy composite plate material by using laminated rolling-diffusion method
CN201561195U (en) * 2009-12-15 2010-08-25 北京首宏钢科技开发有限公司 Tube blank for producing middle, large calibre alloy steel seamless steel tube on a skew tube rolling mill
CN202147445U (en) * 2011-06-20 2012-02-22 郝桂生 Structure of plate slab for rolling TC4 titanium alloy plate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114101329A (en) * 2021-11-26 2022-03-01 中色科技股份有限公司 Continuous cold rolling production method for single TC4 titanium alloy plate
CN114101329B (en) * 2021-11-26 2024-04-05 中色科技股份有限公司 Continuous cold rolling production method for single TC4 titanium alloy plate

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Application publication date: 20130116