CN102418061A - Preparation method for TC2 titanium alloy large-sized plate blanks - Google Patents
Preparation method for TC2 titanium alloy large-sized plate blanks Download PDFInfo
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- CN102418061A CN102418061A CN201110414006XA CN201110414006A CN102418061A CN 102418061 A CN102418061 A CN 102418061A CN 201110414006X A CN201110414006X A CN 201110414006XA CN 201110414006 A CN201110414006 A CN 201110414006A CN 102418061 A CN102418061 A CN 102418061A
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Abstract
The invention discloses a preparation method for TC2 titanium alloy large-sized plate blanks. The preparation method comprises the following steps of: 1, cutting off dead head and ingot bottom of the TC2 titanium alloy cast ingot and removing pores from the surface skin of the cast ingot; 2, cogging and forging the TC2 titanium alloy cast ingot for one heating time; 3, forging the cast ingot subjected to cogging and forging for one heating time to obtain a square billet; 4, performing chamfering drawing-out forging on the square billet for one heating time to obtain the plate blank; and 5, polishing all sides of the plate blank so as to eliminate the defects generated on the surface of the plate blank in the forging process and caused by temperature drop to obtain the TC2 titanium alloy large-sized plate blank. Repeated upsetting is combined with drawing-out forging; grains of titanium alloy are crushed completely by using a large-tonnage fast forging machine and a low-temperature large press-down method, and the obtained plate blank has fine and uniform tissue. The TC2 titanium alloy plate blank prepared by the method has high surface quality and uniform tissue; the product has few internal defects and high stability; and the qualification rate of the products is greatly increased.
Description
Technical field
The invention belongs to the titanium alloy slab preparing technical field, be specifically related to a kind of preparation method of TC2 titanium alloy large size slab.
Background technology
Titanium or titanium alloy has light weight, high specific strength, advantage such as anti-corrosion, in Aeronautics and Astronautics, boats and ships, weapons structural part, occupies critical role.Along with the continuous development of global titanium or titanium alloy processing technology of preparing, titanium alloy is applied to industries such as Aeronautics and Astronautics, naval vessel, automobile, biologic medical, chemical industry more and more.
The TC2 titanium alloy sheet is to adopt the cold deformation moulding as homemade ultra sonic part; Upgrading along with domestic main force opportunity of combat; Requirement to TC2 titanium alloy large size sheet material strengthens day by day, and its various mechanical properties and forming property have also been proposed increasingly high requirement.
Preparing high-quality large-sized plates base is the key that successfully prepares TC2 titanium alloy large size sheet material.It is very big to prepare high quality TC2 titanium alloy large size slab difficulty through common forging working method at present; Main weak point is that more cracking often appears in materials processed; Defectives such as implosion, tissue odds is even, and product performance index is unstable; Qualification rate is lower, and therefore common forging method has not been suitable for the preparation of big specification TC2 titanium alloy slab.
Summary of the invention
Technical problem to be solved by this invention is the deficiency to above-mentioned prior art, provides a kind of method simple, is prone to the preparation method of the TC2 titanium alloy large size slab of realization suitability for industrialized production.Adopt the TC2 titanium alloy slab surface quality of this method preparation good, homogeneous microstructure, the product subsurface defect is few, and product stability is good, and product percent of pass improves greatly.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of preparation method of TC2 titanium alloy large size slab is characterized in that this method may further comprise the steps:
Step 1, cut at the bottom of the rising head and ingot of TC2 titan alloy casting ingot, remove ingot casting epidermis pore;
Step 2, be on the TC2 titanium alloy beta transformation temperature 50 ℃～70 ℃ with the TC2 titan alloy casting ingot of removing the epidermis pore in the step 1 at initial forging temperature, final forging temperature is not less than under 800 ℃ the condition cogging and forges a fire, and air cooling obtains blank to room temperature;
Step 3, be under the TC2 titanium alloy beta transformation temperature 30 ℃～40 ℃ with blank described in the step 2 at initial forging temperature, final forging temperature is not less than under 800 ℃ the condition and forges a fire, and air cooling to room temperature obtains square billet;
Step 4, be under the TC2 titanium alloy beta transformation temperature 50 ℃～70 ℃ with square billet described in the step 3 at initial forging temperature, final forging temperature is not less than under 800 ℃ the condition chamfered edge pulling and forges a fire, and air cooling to room temperature obtains slab;
Step 5, each face of the slab behind the air cooling in the step 4 is polished, to eliminate in the forging process because temperature drop in the defective that steel slab surface produces, obtains length and is not less than 1240mm, width is not less than the TC2 titanium alloy large size slab of 950mm.
The preparation method of above-mentioned a kind of TC2 titanium alloy large size slab; Before cogging described in the step 2 is forged; It is in 750 ℃～800 ℃ the High Temperature Furnaces Heating Apparatus that the TC2 titan alloy casting ingot is placed temperature; Insulation 30min～90min when treating that temperature reaches 800 ℃ in the stove, the temperature rise rate with 1 ℃/min～2 ℃/min is warming up to initial forging temperature and is incubated 230min～290min then.
The preparation method of above-mentioned a kind of TC2 titanium alloy large size slab, with ingot casting jumping-up and pulling 2～3 times repeatedly, the cumulative deformation of each jumping-up and pulling is not less than 60% in the forging process of cogging described in the step 2.
The preparation method of above-mentioned a kind of TC2 titanium alloy large size slab; Before forging described in the step 3; It is in 750 ℃～800 ℃ the High Temperature Furnaces Heating Apparatus that blank is placed temperature; Insulation 30min～90min when treating that temperature reaches 800 ℃ in the stove, the temperature rise rate with 1 ℃/min～2 ℃/min is warming up to initial forging temperature and is incubated 250min～310min then.
The preparation method of above-mentioned a kind of TC2 titanium alloy large size slab, described in the step 3 in the forging process with ingot casting jumping-up and pulling 2～3 times repeatedly, the cumulative deformation of each jumping-up and pulling is not less than 60%.
The preparation method of above-mentioned a kind of TC2 titanium alloy large size slab forges square billet chamfered edge and pulling 1 time in the forging process described in the step 4, and forged deflection is not less than 60%.
The present invention compared with prior art has the following advantages:
1, the inventive method is simple, is prone to realize suitability for industrialized production.
2, the present invention adopts repeatedly jumping-up, pulling forge to combine to carry out, utilize simultaneously large-tonnage soon the forging machine adopt the big reduction method of low temperature to make the crystal grain of titanium alloy obtain abundant fragmentation, the slab of acquisition organize tiny evenly.
3, adopt the TC2 titanium alloy slab surface quality of method preparation of the present invention good, homogeneous microstructure, the product subsurface defect is few, and product stability is good, and product percent of pass improves greatly.
4, the present invention adopts the mode of stage intensification and insulation, makes ingot casting even with big specification blank heating, is more conducive to the later stage forging.
Through embodiment, technical scheme of the present invention is done further detailed description below.
Embodiment
Embodiment 1
The preparation of 127mm * 950mm * 1590mm TC2 titanium alloy slab:
Step 1, selection are of a size of the TC2 titan alloy casting ingot of Φ 420mm, cut at the bottom of the rising head and ingot of ingot casting, remove ingot casting epidermis pore, obtain the TC2 titan alloy casting ingot of Φ 420mm * 1395mm;
Step 2, the TC2 titan alloy casting ingot of removing the epidermis pore in the step 1 is placed temperature is in 750 ℃ the High Temperature Furnaces Heating Apparatus; Insulation 30min when treating that temperature reaches 800 ℃ in the stove is warming up on the TC2 titanium alloy beta transformation temperature 50 ℃ and be incubated 290min with the temperature rise rate of 1 ℃/min then; Using 2500 tons of oil presses, is on the TC2 titanium alloy beta transformation temperature 50 ℃ with the TC2 titan alloy casting ingot after the insulation at initial forging temperature, and final forging temperature is not less than under 800 ℃ the condition cogging and forges a fire, and air cooling obtains blank to room temperature; The forged process of said cogging is: at first with the ingot casting jumping-up to Φ 630mm * 640mm, pull out then to 450mm * 450mm * 950mm, then jumping-up pulls out to 450mm * 450mm * 950mm to 560mm * 560mm * 610mm at last;
Step 3, blank described in the step 2 is placed temperature is to be incubated 90min in 800 ℃ the High Temperature Furnaces Heating Apparatus, is warming up under the TC2 titanium alloy beta transformation temperature 30 ℃ and be incubated 310min with the temperature rise rate of 2 ℃/min then; Using 3150 village oil presses, is under the TC2 titanium alloy beta transformation temperature 30 ℃ with the slab after the insulation at initial forging temperature, and final forging temperature is not less than under 800 ℃ the condition and forges a fire, and air cooling to room temperature obtains the square billet that the length of side is 450mm; Said forged process is: at first with the slab jumping-up to 560mm * 560mm * 610mm; Pull out then to 450mm * 450mm * 950mm; Then jumping-up is to 560mm * 560mm * 610mm; Pull out then to 450mm * 450mm * 950mm, then jumping-up pulls out to the square billet of 450mm * 450mm * 950mm to 560mm * 560mm * 610mm at last;
Step 4, using 2500 village oil presses, is under the TC2 titanium alloy beta transformation temperature 50 ℃ with square billet described in the step 3 at initial forging temperature, and final forging temperature is not less than under 800 ℃ the condition chamfered edge pulling and forges a fire, and air cooling to room temperature obtains slab; Said forged process is: at first with the square billet chamfered edge, pull out then to 127mm * 950mm * 1590mm;
Step 5, each face of slab described in the step 4 is polished, to eliminate in the forging process because temperature drop in the defective that steel slab surface produces, obtains being of a size of the TC2 titanium alloy large size slab of 127mm * 950mm * 1590mm.
Present embodiment adopts repeatedly jumping-up, pulling forging to combine to carry out; Utilize simultaneously large-tonnage soon the forging machine adopt the big reduction method of low temperature to make the crystal grain of titanium alloy obtain abundant fragmentation, the slab of acquisition organize tiny evenly, the TC2 titanium alloy slab surface quality of preparation is good; Homogeneous microstructure; The product subsurface defect is few, and product stability is good, and product percent of pass improves greatly.
Embodiment 2
The preparation of 210mm * 1150mm * 1240mm TC2 titanium alloy slab:
Step 1, selection are of a size of the TC2 titan alloy casting ingot of Φ 560mm, cut at the bottom of the rising head and ingot of ingot casting, remove ingot casting epidermis pore, obtain the TC2 titan alloy casting ingot of Φ 560mm * 1210mm;
Step 2, the TC2 titan alloy casting ingot of removing the epidermis pore in the step 1 is placed temperature is to be incubated 90min in 800 ℃ the High Temperature Furnaces Heating Apparatus, is warming up on the TC2 titanium alloy beta transformation temperature 70 ℃ and be incubated 230min with the temperature rise rate of 2 ℃/min then; Using 3150 village oil presses, is on the TC2 titanium alloy beta transformation temperature 70 ℃ with the TC2 titan alloy casting ingot after the insulation at initial forging temperature, and final forging temperature is not less than under 800 ℃ the condition cogging and forges a fire, and air cooling obtains blank to room temperature; The forged process of said cogging is: at first with the ingot casting jumping-up to Φ 760mm * 660mm, pull out then to 550mm * 550mm * 990mm, then jumping-up pulls out to 550mm * 550mm * 990mm to 700mm * 700mm * 610mm at last;
Step 3, blank described in the step 2 is placed temperature is in 750 ℃ the High Temperature Furnaces Heating Apparatus, and insulation 30min when treating that temperature rises to 800 ℃ in the stove is warming up under the TC2 titanium alloy beta transformation temperature 40 ℃ and be incubated 250min with the temperature rise rate of 1 ℃/min then; Using 3150 village oil presses, is under the TC2 titanium alloy beta transformation temperature 40 ℃ with the slab after the insulation at initial forging temperature, and final forging temperature is not less than under 800 ℃ the condition and forges a fire, and air cooling to room temperature obtains the square billet that the length of side is 550mm; Said forged process is: at first with the slab jumping-up to 700mm * 700mm * 610mm, pull out then to 550mm * 550mm * 990mm, then jumping-up pulls out to the square billet of 550mm * 550mm * 990mm to 700mm * 700mm * 610mm at last;
Step 4, using 3150 village oil presses, is under the TC2 titanium alloy beta transformation temperature 70 ℃ with square billet described in the step 3 at initial forging temperature, and final forging temperature is not less than under 800 ℃ the condition chamfered edge pulling and forges a fire, and air cooling to room temperature obtains slab; Said forged process is: at first with the square billet chamfered edge, pull out then to 210mm * 1150mm * 1240mm;
Step 5, each face of slab described in the step 4 is polished, to eliminate in the forging process because temperature drop in the defective that steel slab surface produces, obtains being of a size of the TC2 titanium alloy large size slab of 210mm * 1150mm * 1240mm.
Present embodiment adopts repeatedly jumping-up, pulling forging to combine to carry out; Utilize simultaneously large-tonnage soon the forging machine adopt the big reduction method of low temperature to make the crystal grain of titanium alloy obtain abundant fragmentation, the slab of acquisition organize tiny evenly, the TC2 titanium alloy slab surface quality of preparation is good; Homogeneous microstructure; The product subsurface defect is few, and product stability is good, and product percent of pass improves greatly.
Embodiment 3
The preparation of 240mm * 1200mm * 1310mm TC2 titanium alloy slab:
Step 1, selection are of a size of the TC2 titan alloy casting ingot of Φ 690mm, cut at the bottom of the rising head and ingot of ingot casting, remove ingot casting epidermis pore, obtain the TC2 titan alloy casting ingot of Φ 690mm * 1010mm;
Step 2, the TC2 titan alloy casting ingot of removing the epidermis pore in the step 1 is placed temperature is in 780 ℃ the High Temperature Furnaces Heating Apparatus; Insulation 60min when treating that temperature rises to 800 ℃ in the stove is warming up on the TC2 titanium alloy beta transformation temperature 60 ℃ and be incubated 260min with the temperature rise rate of 1.5 ℃/min then; Using 3150 tons of oil presses, is on the TC2 titanium alloy beta transformation temperature 60 ℃ with the TC2 titan alloy casting ingot after the insulation at initial forging temperature, and final forging temperature is not less than under 800 ℃ the condition cogging and forges a fire, and air cooling obtains blank to room temperature; The forged process of said cogging is: at first with the ingot casting jumping-up to Φ 800mm * 750mm; Pull out then to 600mm * 600mm * 1050mm; Then jumping-up is to 800mm * 800mm * 590mm; Pull out to 600mm * 600mm * 1050mm, then jumping-up pulls out to 600mm * 600mm * 1050mm to 800mm * 800mm * 590mm at last again;
Step 3, blank described in the step 2 is placed temperature is in 780 ℃ the High Temperature Furnaces Heating Apparatus, and insulation 60min when treating that temperature rises to 800 ℃ in the stove is warming up under the TC2 titanium alloy beta transformation temperature 35 ℃ and be incubated 280min with the temperature rise rate of 1.5 ℃/min then; Using 3150 village oil presses, is under the TC2 titanium alloy beta transformation temperature 35 ℃ with the slab after the insulation at initial forging temperature, and final forging temperature is not less than under 800 ℃ the condition and forges a fire, and air cooling to room temperature obtains the square billet that the length of side is 600mm; Said forged process is: at first with the slab jumping-up to 800mm * 800mm * 590mm, pull out then to 600mm * 600mm * 1050mm, then jumping-up pulls out to the square billet of 600mm * 600mm * 1050mm to 800mm * 800mm * 590mm at last;
Step 4, using 3150 village oil presses, is under the TC2 titanium alloy beta transformation temperature 60 ℃ with square billet described in the step 3 at initial forging temperature, and final forging temperature is not less than under 800 ℃ the condition chamfered edge pulling and forges a fire, and air cooling to room temperature obtains slab; Said forged process is: at first with the square billet chamfered edge, pull out then to 240mm * 1200mm * 1310mm;
Step 5, each face of slab described in the step 4 is polished, to eliminate in the forging process because temperature drop in the defective that steel slab surface produces, obtains being of a size of the TC2 titanium alloy large size slab of 240mm * 1200mm * 1310mm.
Present embodiment adopts repeatedly jumping-up, pulling forging to combine to carry out; Utilize simultaneously large-tonnage soon the forging machine adopt the big reduction method of low temperature to make the crystal grain of titanium alloy obtain abundant fragmentation, the slab of acquisition organize tiny evenly, the TC2 titanium alloy slab surface quality of preparation is good; Homogeneous microstructure; The product subsurface defect is few, and product stability is good, and product percent of pass improves greatly.
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 (6)
1. the preparation method of a TC2 titanium alloy large size slab is characterized in that, this method may further comprise the steps:
Step 1, cut at the bottom of the rising head and ingot of TC2 titan alloy casting ingot, remove ingot casting epidermis pore;
Step 2, be on the TC2 titanium alloy beta transformation temperature 50 ℃～70 ℃ with the TC2 titan alloy casting ingot of removing the epidermis pore in the step 1 at initial forging temperature, final forging temperature is not less than under 800 ℃ the condition cogging and forges a fire, and air cooling obtains blank to room temperature;
Step 3, be under the TC2 titanium alloy beta transformation temperature 30 ℃～40 ℃ with blank described in the step 2 at initial forging temperature, final forging temperature is not less than under 800 ℃ the condition and forges a fire, and air cooling to room temperature obtains square billet;
Step 4, be under the TC2 titanium alloy beta transformation temperature 50 ℃～70 ℃ with square billet described in the step 3 at initial forging temperature, final forging temperature is not less than under 800 ℃ the condition chamfered edge pulling and forges a fire, and air cooling to room temperature obtains slab;
Step 5, each face of the slab behind the air cooling in the step 4 is polished, to eliminate in the forging process because temperature drop in the defective that steel slab surface produces, obtains length and is not less than 1240mm, width is not less than the TC2 titanium alloy large size slab of 950mm.
2. the preparation method of a kind of TC2 titanium alloy large size slab according to claim 1; It is characterized in that; Before cogging described in the step 2 is forged; It is in 750 ℃～800 ℃ the High Temperature Furnaces Heating Apparatus that the TC2 titan alloy casting ingot is placed temperature, insulation 30min～90min when treating that temperature reaches 800 ℃ in the stove, and the temperature rise rate with 1 ℃/min～2 ℃/min is warming up to initial forging temperature and is incubated 230min～290min then.
3. the preparation method of a kind of TC2 titanium alloy large size slab according to claim 1 is characterized in that, with ingot casting jumping-up and pulling 2～3 times repeatedly, the cumulative deformation of each jumping-up and pulling is not less than 60% in the forging process of cogging described in the step 2.
4. the preparation method of a kind of TC2 titanium alloy large size slab according to claim 1; It is characterized in that; Before forging described in the step 3; It is in 750 ℃～800 ℃ the High Temperature Furnaces Heating Apparatus that blank is placed temperature, insulation 30min～90min when treating that temperature reaches 800 ℃ in the stove, and the temperature rise rate with 1 ℃/min～2 ℃/min is warming up to initial forging temperature and is incubated 250min～310min then.
5. the preparation method of a kind of TC2 titanium alloy large size slab according to claim 1 is characterized in that, described in the step 3 in the forging process with ingot casting jumping-up and pulling 2～3 times repeatedly, the cumulative deformation of each jumping-up and pulling is not less than 60%.
6. the preparation method of a kind of TC2 titanium alloy large size slab according to claim 1 is characterized in that, in the forging process square billet chamfered edge and pulling is forged 1 time described in the step 4, and forged deflection is not less than 60%.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102912270A (en) * | 2012-11-12 | 2013-02-06 | 西部钛业有限责任公司 | Hot-working process capable of improving cogging for titanium alloy cast ingot |
| CN103060733A (en) * | 2013-01-01 | 2013-04-24 | 西部钛业有限责任公司 | Method for preparing large-size TC2 titanium alloy bars |
| CN104525567A (en) * | 2014-12-11 | 2015-04-22 | 西部钛业有限责任公司 | TA7 titanium alloy plate rolling method |
| CN104722689A (en) * | 2015-03-16 | 2015-06-24 | 无锡市派克重型铸锻有限公司 | Large size aluminum alloy keelblook homogenization forging improving method |
| CN105127342A (en) * | 2015-08-28 | 2015-12-09 | 攀钢集团江油长城特殊钢有限公司 | Titanium and titanium alloy billet and forging method thereof |
| CN106868436A (en) * | 2017-01-18 | 2017-06-20 | 抚顺特殊钢股份有限公司 | A kind of fast footpath forging Joint Production GH4169 alloy fine grain bar manufacture method |
| CN108480418A (en) * | 2018-03-19 | 2018-09-04 | 江苏大学 | A kind of preparation method of high intensity TC6 titanium-alloy thin-plates |
| CN108746448A (en) * | 2018-06-04 | 2018-11-06 | 宁波创润新材料有限公司 | A kind of high purity titanium ingot cogging forging method for semiconductor sputtering target |
| CN112108606A (en) * | 2020-09-07 | 2020-12-22 | 中国航发北京航空材料研究院 | Preparation method of titanium alloy forging |
| CN114574795A (en) * | 2022-03-14 | 2022-06-03 | 江西景航航空锻铸有限公司 | Thermal treatment method for TC2 titanium alloy small forgings with high impact toughness |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102912270A (en) * | 2012-11-12 | 2013-02-06 | 西部钛业有限责任公司 | Hot-working process capable of improving cogging for titanium alloy cast ingot |
| CN102912270B (en) * | 2012-11-12 | 2014-05-07 | 西部钛业有限责任公司 | Hot-working process capable of improving cogging for titanium alloy cast ingot |
| CN103060733A (en) * | 2013-01-01 | 2013-04-24 | 西部钛业有限责任公司 | Method for preparing large-size TC2 titanium alloy bars |
| CN103060733B (en) * | 2013-01-01 | 2015-01-21 | 西部钛业有限责任公司 | Method for preparing large-size TC2 titanium alloy bars |
| CN104525567A (en) * | 2014-12-11 | 2015-04-22 | 西部钛业有限责任公司 | TA7 titanium alloy plate rolling method |
| CN104722689A (en) * | 2015-03-16 | 2015-06-24 | 无锡市派克重型铸锻有限公司 | Large size aluminum alloy keelblook homogenization forging improving method |
| CN105127342A (en) * | 2015-08-28 | 2015-12-09 | 攀钢集团江油长城特殊钢有限公司 | Titanium and titanium alloy billet and forging method thereof |
| CN106868436A (en) * | 2017-01-18 | 2017-06-20 | 抚顺特殊钢股份有限公司 | A kind of fast footpath forging Joint Production GH4169 alloy fine grain bar manufacture method |
| CN106868436B (en) * | 2017-01-18 | 2021-05-14 | 抚顺特殊钢股份有限公司 | Manufacturing method for producing high-temperature alloy GH4169 fine-grained bar through rapid-diameter forging combination |
| CN108480418A (en) * | 2018-03-19 | 2018-09-04 | 江苏大学 | A kind of preparation method of high intensity TC6 titanium-alloy thin-plates |
| CN108746448A (en) * | 2018-06-04 | 2018-11-06 | 宁波创润新材料有限公司 | A kind of high purity titanium ingot cogging forging method for semiconductor sputtering target |
| CN108746448B (en) * | 2018-06-04 | 2020-06-02 | 宁波创润新材料有限公司 | Cogging forging method for high-purity titanium ingot for semiconductor sputtering target material |
| CN112108606A (en) * | 2020-09-07 | 2020-12-22 | 中国航发北京航空材料研究院 | Preparation method of titanium alloy forging |
| CN114574795A (en) * | 2022-03-14 | 2022-06-03 | 江西景航航空锻铸有限公司 | Thermal treatment method for TC2 titanium alloy small forgings with high impact toughness |
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