CN103447296A - Method for manufacturing Ti60 alloy sheet - Google Patents
Method for manufacturing Ti60 alloy sheet Download PDFInfo
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- CN103447296A CN103447296A CN2013103662201A CN201310366220A CN103447296A CN 103447296 A CN103447296 A CN 103447296A CN 2013103662201 A CN2013103662201 A CN 2013103662201A CN 201310366220 A CN201310366220 A CN 201310366220A CN 103447296 A CN103447296 A CN 103447296A
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Abstract
The invention discloses a method for manufacturing a Ti60 alloy sheet. The method for manufacturing the Ti60 alloy sheet comprises the steps of material preparation, hot rolling, manufacturing of pack-rolling package, packaging pack-rolling, annealing, surface sanding, acid washing and cutting to length of a finished product. According to the method, the manufactured large-sized Ti60 alloy sheet has a width of more than or equal to 800mm, a thickness of 1.0 to 3.0mm, room temperature strength capable of reaching more than 1,100MPa and tensile strength capable of reaching more than 700MPa under the high-temperature condition of 600 DEG C; the method is high in performance, novel in process route, low in manufacturing cost and high in working efficiency, and can be used for manufacturing large-sized materials in batches.
Description
[technical field]
The present invention relates to a kind of preparation method of latten, especially relate to a kind of preparation method of Ti60 latten.
[background technology]
Known, in recent years, along with science and technology is fast-developing, advanced aircraft has proposed higher index to mobility and flying speed, this just requires the engine thrust-weight ratio further to improve, and high thrust-weight ratio aero-engine requires to have reached 600 ℃ to the serviceability temperature of titanium alloy, and conventional titanium alloy can not meet this requirement, TC4 service temperature≤400 ℃ for example, TA15 service temperature≤500 ℃; Therefore, countries in the world are the continuous development of having carried out high-temperature titanium alloy mutually, and obtained success, such as: the Ti60 of the IMI834 of Britain, the Ti1100 of the U.S., Muscovite BT36 and China, Ti600 titanium alloy etc., the exploitation of novel light high temperature resistant titanium alloy structural material, promoted the development of the hard-core technology industries such as Aeronautics and Astronautics greatly.
The Ti60 alloy is a kind of nearly α type high-temperature titanium alloy, there is density low, specific strength is high, the advantages such as Heat stability is good, more than under 600 ℃ of hot conditions, tensile strength can reach 650MPa, elevated temperature strength, high-temperature and durable and croop property are superior, service temperature can reach 600 ℃, can part replacement nickel based high-temperature alloy etc. the high density structures material, due to high density structures materials such as part replacement nickel based high-temperature alloys, aircraft weight can loss of weight nearly 40%, greatly reduce aircraft weight, and thrust-weight ratio and the efficiency of engine have been improved, advanced aircraft engine vitals and missile case ideal material, but, the Ti60 titanium alloy belongs to high alloy content, polynary complicated titanium alloy, there is intensity high, the poor characteristic of process plastic, processing preparation 1.0～3.0mm thickness plate difficulty, especially more difficult for preparing the large specification thin plate of width >=800mm.
[summary of the invention]
In order to overcome the deficiency in background technology, the invention discloses a kind of preparation method of Ti60 latten, large specification Ti60 latten width >=800mm, thickness that the preparation method of described Ti60 latten prepares are 1.0～3.0mm, more than its room temperature strength can reach 1100MPa, more than under 600 ℃ of hot conditions, tensile strength can reach 700MPa; Superior performance of the present invention, process route are novel, preparation cost is low, high efficiency, also can prepare large gauge material and realize producing in enormous quantities.
In order to realize the purpose of foregoing invention, the present invention adopts following technical scheme:
A kind of preparation method of Ti60 latten, described method concrete operation step is as follows:
The first step, get the raw materials ready: first get the Ti60 slab ready, Q345 steel bar and high temperature interleaving agent that the Q345 steel plate that 8～20mm is thick, diameter are 10～30mm are stand-by;
Connect a step, second step, hot rolling: adopting 3～4 fire that the Ti60 slab is rolled to thickness is 4～6mm, for pack ply-rolling provides the semifinished sheet blank;
Connect a step, the 3rd step, ply rolling pack work: according to the trimmed size of thin plate, Ti60 thin plate and Q345 steel plate are cut, cut the length and width precision and be (0 ,+5) mm, diagonal deviation≤5mm, then at Ti60 plate and the even coated with high temperature interleaving agent of Q345 surface of steel plate, use the Q345 steel plate as cladding plate, press from both sides 2～6 thick Ti60 central layers of 4～6mm between cladding plate, then with the Q345 steel bar, sealing is carried out in ply rolling bag four limits;
Connect a step, the 4th step, pack ply-rolling: blank charging temperature and holding temperature are 900～1050 ℃, temperature retention time is calculated with 1.2 ± 0.1min/mm, pass deformation rate is 8～25%, control finishing temperature >=600 ℃, then according to Ti60 finished product thickness specification difference, central layer/cladding plate deformation coefficient is 0.85～0.98, determine the pack ply-rolling target thickness by deformation coefficient, cladding plate thickness, Ti60 central layer gross thickness, should be the reserved 0.05～0.20mm sanding thickness surplus of Ti60 finished sheet simultaneously;
Connect a step, the 5th step, annealing: adopt air atmosphere to be annealed, after annealing sheet material is put neatly, top compacting 30～100mm common carbon steel board works the orthopedic effect of pressing, annealing sheet material charging temperature≤650 ℃, under charging temperature, preheating, after 1～3 hour, is warming up to 750～900 ℃ of annealing temperatures and is incubated, temperature retention time is 1～5 hour, according to annealing sheet material gross thickness, calculates;
Connect a step, the 6th step, sanding surface: under the tension force effect, adopt abrasive finishing method to remove Ti60 thin sheet surface oxide layer, at first use 80～180# abrasive band to carry out coarse sand light, then adopt 180～320# abrasive band to carry out washed ore light, finally use the above granularity abrasive material of 320# to carry out finishing polish;
Connect a step, the 7th step, pickling: pickle is comprised of hydrofluoric acid, nitric acid and water, and hydrofluoric acid (HF) mass concentration is 2.0～5.0%, nitric acid (HNO
3) mass concentration is 10.0～35.0%, ratio between the two is HF:HNO
3=1:(3～10);
Connect a step, the 8th step, product sizing are cut: by width and the excision of length burr, obtain trimmed size Ti60 thin plate.
The preparation method of described Ti60 latten, in the second step hot-rolled step, wherein the charging temperature of heating once and rolling is 700～1000 ℃, under charging temperature after preheating 1～3h, furnace temperature is risen to 1000～1120 ℃ and be incubated, temperature retention time is calculated with 1.6 ± 0.2min/mm, and a quirk time deformation rate is between 5～26%, one fiery rolling process deformation rate 50～90%, be rolled to fiery target thickness a 15～40mm through 6～16 passages; Wherein two fiery rolling blank reconditionings: two sides whole peeling, polishing, the thorough removing of a fiery sheet material crackle is clean, and the blank surface reconditioning should be even, reconditioning pit depth<sotck thinkness 15%, depth-to-width ratio ≯ 1:10, answer >=80# of sized flap wheel is used in final polishing; Wherein two fiery rollings: two fire commutation rollings, 600～900 ℃ of charging temperatures, under charging temperature after preheating 0.5～1h, furnace temperature is risen to 900～1080 ℃ to be incubated, temperature retention time is calculated with 1.3 ± 0.2min/mm, two fiery rolling pass deformation rates are between 3～22%, and two fiery rolling process deformation rates 40～80%, be rolled to two fiery target thickness 8.0～12mm through 4～10 passages; Wherein three fiery rolling blank reconditionings: after sandblast, pickling, the check table planar defect, and Defect removal is clean, reconditioning pit depth<sotck thinkness 10%, depth-to-width ratio ≯ 1:10, answer >=100# of sized flap wheel is used in final polishing; Wherein three fiery rollings: blank charging temperature and holding temperature are 900～1050 ℃, temperature retention time is calculated with 1.2 ± 0.1min/mm, three fiery rolling pass deformation rates, between 2～20%, are controlled finishing temperature>600 ℃, through 6～12 passages, are rolled to three fiery target thickness 4～6mm; Wherein four fiery rollings: when needed, carry out four fiery rollings, concrete technology is with three fiery rollings; Wherein the fiery boards half-finished product of pack ply-rolling blank reconditioning: Ti60 tri-carries out local reconditioning after sandblast, pickling, and scarfing is clean, reconditioning pit depth<sotck thinkness 10%, depth-to-width ratio ≯ 1:10.
The preparation method of described Ti60 latten, in the step 3 ply rolling packs work, three 30 ± 5mm width steam vents are reserved on each limit on described ply rolling bag four limits, lay respectively at centre and the two ends on every limit, need to use the hydraulic press compacting before assembly welding, make the laminating of ply rolling bag closely.
The preparation method of described Ti60 latten, in the step 6 sanding surface is processed, according to abrasive band and polish abrasive granularity difference, through sanding, the polishing surface roughness can carefully to 0.2～0.8 μ m.
The preparation method of described Ti60 latten, in the step 7 pickling processes, pickling temperature is controlled at 40～55 ℃, pickling speed 3～10mm/min.
Owing to adopting technique scheme, the present invention has following beneficial effect:
1. process route novelty: adopt first pack ply-rolling technique directly to produce the thick Ti60 thin plate of 1.0～3.0mm, replaced cold-rolling process for tradition and produced the titanium-alloy thin-plate way;
2. preparation cost is low, efficiency is high: adopt ply rolling to replace the cold rolling direct production Ti60 thin plate of many rolling processes, can save 2～4 cold rolling rolling processes and semi-finished product annealing operation, manufacturing procedure reduces more than 40%, and each ply rolling bag can be produced 2～6 Ti60 finished sheets, this kind of preparation technology has efficiently, advantage of low cost;
3. can prepare the large scale material: because the conventional titanium alloy plate adopts warm-rolling or cold-rolling process, during rolling, the Ti60 plate temperature is low, the rolling deformation drag is large, be difficult to realize the large specification thin plate preparation of wide cut, during pack ply-rolling of the present invention, within the Ti60 central layer is wrapped in the Q345 cladding plate, is conducive to reduce in the operation of rolling and dispels the heat, Ti60 central layer temperature in the assurance operation of rolling >=600 ℃, thereby can reduce the rolling deformation drag, realize width >=800mm wide cut large-sized plates material preparation;
4. equipment is simple: adopt cold rolling or warm rolling method to prepare the cold-rolling mill that large specification Ti60 thin plate need to possess large roll-force ability, apparatus expensive, and the technology that the present invention adopts can realize preparation on traditional hot-rolling mill;
5. batch production: this method can realize batch production on traditional hot-rolling mill.
[specific embodiment]
Can explain in more detail the present invention by the following examples, disclose purpose of the present invention and be intended to protect all changes and improvements in the scope of the invention, the present invention is not limited to the following examples:
The preparation method of Ti60 latten of the present invention, the first step, get the raw materials ready: first get the Ti60 slab ready, Q345 steel bar and high temperature interleaving agent that the Q345 steel plate that 8～20mm is thick, diameter are 10～30mm are stand-by; Second step, hot rolling: adopting 3～4 fire that the Ti60 slab is rolled to thickness is 4～6mm, for pack ply-rolling provides the semifinished sheet blank; In the second step hot-rolled step, wherein the charging temperature of heating once and rolling is 700～1000 ℃, under charging temperature after preheating 1～3h, furnace temperature is risen to 1000～1120 ℃ to be incubated, temperature retention time is calculated with 1.6 ± 0.2min/mm, one quirk time deformation rate is between 5～26%, and a fiery rolling process deformation rate 50～90%, be rolled to fiery target thickness a 15～40mm through 6～16 passages; Wherein two fiery rolling blank reconditionings: two sides whole peeling, polishing, the thorough removing of a fiery sheet material crackle is clean, and the blank surface reconditioning should be even, reconditioning pit depth<sotck thinkness 15%, depth-to-width ratio ≯ 1:10, answer>=80# of sized flap wheel is used in final polishing; Wherein two fiery rollings: two fire commutation rollings, 600～900 ℃ of charging temperatures, under charging temperature after preheating 0.5～1h, furnace temperature is risen to 900～1080 ℃ to be incubated, temperature retention time is calculated with 1.3 ± 0.2min/mm, two fiery rolling pass deformation rates are between 3～22%, and two fiery rolling process deformation rates 40～80%, be rolled to two fiery target thickness 8.0～12mm through 4～10 passages; Wherein three fiery rolling blank reconditionings: after sandblast, pickling, the check table planar defect, and Defect removal is clean, reconditioning pit depth<sotck thinkness 10%, depth-to-width ratio ≯ 1:10, answer>=100# of sized flap wheel is used in final polishing; Wherein three fiery rollings: blank charging temperature and holding temperature are 900～1050 ℃, temperature retention time is calculated with 1.2 ± 0.1min/mm, three fiery rolling pass deformation rates, between 2～20%, are controlled finishing temperature>600 ℃, through 6～12 passages, are rolled to three fiery target thickness 4～6mm; Wherein four fiery rollings: when needed, carry out four fiery rollings, concrete technology is with three fiery rollings; Wherein the fiery boards half-finished product of pack ply-rolling blank reconditioning: Ti60 tri-carries out local reconditioning after sandblast, pickling, and scarfing is clean, reconditioning pit depth<sotck thinkness 10%, depth-to-width ratio ≯ 1:10; The 3rd step, ply rolling pack work: according to the trimmed size of thin plate, Ti60 thin plate and Q345 steel plate are cut, cut the length and width precision and be (0, + 5) mm, diagonal deviation≤5mm, then at Ti60 plate and the even coated with high temperature interleaving agent of Q345 surface of steel plate, used the Q345 steel plate as cladding plate, press from both sides 2～6 thick Ti60 central layers of 4～6mm between cladding plate, then with the Q345 steel bar, sealing is carried out in ply rolling bag four limits; In the step 3 ply rolling packs work, three 30 ± 5mm width steam vents are reserved on each limit on described ply rolling bag four limits, lay respectively at centre and the two ends on every limit, need to use the hydraulic press compacting before assembly welding, make the laminating of ply rolling bag closely; The 4th step, pack ply-rolling: blank charging temperature and holding temperature are 900～1050 ℃, temperature retention time is calculated with 1.2 ± 0.1min/mm, pass deformation rate is 8～25%, control finishing temperature>=600 ℃, then according to Ti60 finished product thickness specification difference, central layer/cladding plate deformation coefficient is 0.85～0.98, by deformation coefficient, cladding plate thickness, Ti60 central layer gross thickness, determines the pack ply-rolling target thickness, should be the reserved 0.05～0.20mm sanding thickness surplus of Ti60 finished sheet simultaneously; The 5th step, annealing: adopt air atmosphere to be annealed, after annealing sheet material is put neatly, top compacting 30～100mm common carbon steel board works the orthopedic effect of pressing, annealing sheet material charging temperature≤650 ℃, under charging temperature, preheating is after 1～3 hour, be warming up to 750～900 ℃ of annealing temperatures and be incubated, temperature retention time is 1～5 hour, according to annealing sheet material gross thickness, calculates; The 6th step, sanding surface: under the tension force effect, adopt abrasive finishing method to remove Ti60 thin sheet surface oxide layer, at first use 80～180# abrasive band to carry out coarse sand light, then adopt 180～320# abrasive band to carry out washed ore light, the final above granularity abrasive material of 320# that uses carries out finishing polish, according to abrasive band and polish abrasive granularity difference, can carefully to 0.2～0.8 μ m through sanding, polishing surface roughness; The 7th step, pickling: pickle is comprised of hydrofluoric acid, nitric acid and water, and hydrofluoric acid (HF) mass concentration is 2.0～5.0%, nitric acid (HNO
3) mass concentration is 10.0～35.0%, ratio between the two is HF:HNO
3=1:(3～10); Pickling temperature is controlled at 40～55 ℃, pickling speed 3～10mm/min.The 8th step, product sizing are cut: by width and the excision of length burr, obtain trimmed size Ti60 thin plate; The present invention, by the process of suitable adjustment Ti60 alloy, can prepare the Ti60 latten of width≤800mm;
embodiment 1:
The first step, get the raw materials ready: first get the Ti60 slab ready, Q345 steel bar and high temperature interleaving agent that the Q345 steel plate that 15mm is thick, diameter are 10mm are stand-by;
Second step, hot rolling: adopting 3 fire that the Ti60 slab is rolled to thickness is 5mm, for pack ply-rolling provides the semifinished sheet blank; In the second step hot-rolled step, wherein the charging temperature of heating once and rolling is 800 ℃, under charging temperature after preheating 1.5h, furnace temperature is risen to 1100 ℃ to be incubated, temperature retention time is calculated with 1.5min/mm, be rolled to 20mm through 13 passages, each pass deformation rate is followed successively by 8.3%, 9.1%, 15.0%, 16.8%, 16.3%, 15.2%, 14.0%, 13.9%, 12.4%, 12.3%, 11.5%, 11.1%, 11.1%, wherein a fiery rolling process deformation rate 83.3%; To Ti60 plate after a fire carry out two-sidedly stripping off the skin, the polishing reconditioning processes; Wherein two fire commutation rollings, 800 ℃ of charging temperatures, under charging temperature after preheating 0.5h, furnace temperature is risen to 980 ℃ to be incubated, temperature retention time is calculated with 1.2min/mm, be rolled to 10mm through 4 passages, each pass deformation rate is followed successively by 18.0%, 16.0%, 16.0%, 13.8%, two fiery rolling process deformation rate 50%; Ti60 sheet material after two fire is carried out to sandblast, pickling and local reconditioning polishing, scarfing is clean; Wherein the charging temperature of three fiery rollings is 980 ℃, after temperature stabilization, after 980 ℃, be incubated, temperature retention time is calculated with 1.2min/mm, be rolled to 5mm through 8 passages, each pass deformation rate is followed successively by 16.0%, 14.3%, 9.7%, 6.5%, 6.2%, 5.3%, 4.6%, 3.9%, 720 ℃ of the fiery finishing temperatures of three fiery rolling process deformation rates 50%, three; Ti60 sheet material after three fire is carried out to sandblast, pickling and local reconditioning polishing, scarfing is clean;
The 3rd step, ply rolling pack work: Q345 steel plate scale specification is
, Ti60 central layer scale specification is
q345 steel plate and Ti60 central layer diagonal deviation≤5mm, then at Ti60 and Q345 plate dual coating glass-based high temperature interleaving agent, use the Q345 steel plate as cladding plate, between cladding plate, 2 thick Ti60 central layers of 5mm of folder, then carry out sealing with the Q345 steel bar to ply rolling bag four limits, 3 30 ± 5mm width steam vents are reserved on each limit, lay respectively at centre and the two ends on every limit, need use the hydraulic press compacting during assembly welding, make the laminating of ply rolling bag closely;
The 4th step, pack ply-rolling: 980 ℃ of blank charging temperatures, temperature is carried out heat tracing after temperature, temperature retention time is calculated with 1.2mm/min, the insulation of ply rolling bag finishes to be rolled to the 9.6mm target thickness by 8 passages, each pass deformation rate is followed successively by 17.5%, 21.2%, 18.5%, 17.0%, 16.5%, 15.7%, 12.9%, 11.1%, 760 ℃ of ply rolling finishing temperatures, after ply rolling raise cladding plate, the Ti60 thin plate that to obtain average thickness be 1.55mm;
The 5th step, annealing: Ti60 thin plate when annealing, use the thick common carbon steel board of 30mm to play the effect of rectification plate shape as pressing plate, 600 ℃ of annealing shove charge furnace temperature, under charging temperature, preheating, after 1 hour, rises to 860 ℃ of annealing temperatures and is incubated, and comes out of the stove after being incubated 2.5 hours;
The 6th step, sanding surface: after ply rolling, at first the Ti60 thin plate is used 80#, 120# abrasive band to carry out coarse sand light, then uses 180#, 280# abrasive band to carry out washed ore light, finally uses the 320# abrasive material to carry out finishing polish, and the about 0.05mm of thickness is removed in sanding.Through the surface of polished mean roughness, be 0.42 μ m;
The 7th step, pickling: pickle is mixed by 2.0～2.5% mass concentration hydrofluoric acid (HF), 15.0～16.0% mass concentration nitric acid (HNO3) and water, and pickling temperature is controlled at 40～55 ℃, pickling speed 6mm/min;
The 8th step, product sizing are cut: obtain the large specification Ti60 thin plate of 1.5 * 860 * 2500mm after product sizing, thin plate room temperature tensile and high temperature tensile properties are shown in Table 1.
embodiment 2:
The first step, get the raw materials ready: first get the Ti60 slab ready, Q345 steel bar and high temperature interleaving agent that the Q345 steel plate that 20mm is thick, diameter are 24mm are stand-by;
Second step, hot rolling: adopting 3 fire that the Ti60 slab is rolled to thickness is 6mm, for pack ply-rolling provides the semifinished sheet blank; In the second step hot-rolled step, wherein the charging temperature of heating once and rolling is 800 ℃, under charging temperature after preheating 1.5h, furnace temperature is risen to 1080 ℃ to be incubated, temperature retention time is calculated with 1.5min/mm, through 8 passages, is rolled to 30mm, and each pass deformation rate is followed successively by 10.0%, 11.1%, 19.1%, 18.3%, 17.6%, 17.2%, 16.2%, 16.0%, a fiery rolling process deformation rate wherein, 75%; To Ti60 plate after a fire carry out two-sidedly stripping off the skin, the polishing reconditioning processes; Wherein two fire commutation rollings, 800 ℃ of charging temperatures, under charging temperature after preheating 40min, furnace temperature is risen to 950 ℃ to be incubated, temperature retention time is calculated with 1.2min/mm, be rolled to 12mm through 6 passages, each pass deformation rate is followed successively by 20.0%, 16.7%, 14.0%, 12.8%, 12.0%, 9.1%, two fiery rolling process deformation rate 60%; Ti60 sheet material after two fire is carried out to sandblast, pickling and local reconditioning polishing, scarfing is clean; Wherein the charging temperature of three fiery rollings is 950 ℃, after temperature stabilization, after 950 ℃, be incubated, temperature retention time is calculated with 1.2min/mm, be rolled to 6mm through 6 passages, each pass deformation rate is followed successively by 16.7%, 15.0%, 11.8%, 10.7%, 9.0%, 3.0%, 680 ℃ of the fiery finishing temperatures of three fiery rolling process deformation rates 50%, three; Ti60 sheet material after three fire is carried out to sandblast, pickling and local reconditioning polishing, scarfing is clean;
The 3rd step, ply rolling pack work: Q345 steel plate scale specification is
, Ti60 central layer scale specification is
q345 steel plate and Ti60 central layer diagonal deviation≤5mm, then at Ti60 and Q345 plate dual coating glass-based high temperature interleaving agent, use the Q345 steel plate as cladding plate, between cladding plate, 4 thick Ti60 central layers of 6mm of folder, then carry out sealing with the Q345 steel bar to ply rolling bag four limits, 3 30 ± 5mm width steam vents are reserved on each limit, lay respectively at centre and the two ends on every limit, need use the hydraulic press compacting during assembly welding, make the laminating of ply rolling bag closely;
The 4th step, pack ply-rolling: 950 ℃ of blank charging temperatures, after furnace temperature is stable, be incubated, temperature retention time is calculated with 1.2min/mm, the insulation of ply rolling bag finishes to be rolled to the 25.6mm target thickness by 6 passages, each pass deformation rate is followed successively by 10.9%, 21.1%, 16.7%, 13.9%, 12.4%, 9.5%, after ply rolling, cladding plate is raised to the Ti60 thin plate that to obtain average thickness be 2.6mm;
The 5th step, annealing: Ti60 thin plate when annealing, use the thick common carbon steel board of 50mm to play the effect of rectification plate shape as pressing plate, 600 ℃ of annealing shove charge furnace temperature, under charging temperature, preheating, after 1.5 hours, rises to 820 ℃ of annealing temperatures and is incubated, and comes out of the stove after being incubated 3.2 hours;
The 6th step, sanding surface: after ply rolling, at first the Ti60 thin plate is used 80#, 120# abrasive band to carry out coarse sand light, then uses 160#, 260# abrasive band to carry out washed ore light, finally uses the 380# abrasive material to carry out finishing polish, and the about 0.1mm of thickness is removed in sanding.Through the surface of polished mean roughness, be 0.38 μ m;
The 7th step, pickling: pickle is mixed by 2.0 ~ 2.5% mass concentration hydrofluoric acid (HF), 15.0～16.0% mass concentration nitric acid (HNO3) and water, and pickling temperature is controlled at 40～55 ℃, pickling speed 6mm/min;
The 8th step, product sizing are cut: obtain the large specification Ti60 thin plate of 2.5 * 830 * 2200mm after product sizing, thin plate room temperature tensile and high temperature tensile properties are shown in Table 1.
Thin plate room temperature tensile and high temperature tensile properties are shown in Table 1.
Room temperature and the mechanical behavior under high temperature of table 1 Ti60 latten.
The embodiment selected in this article in order to disclose purpose of the present invention, current think suitable, but will be appreciated that, the present invention is intended to comprise that all belong to all changes and the improvement of this design and the interior embodiment of the scope of the invention.
Claims (5)
1. the preparation method of a Ti60 latten, it is characterized in that: described method concrete operation step is as follows:
The first step, get the raw materials ready: first get the Ti60 slab ready, Q345 steel bar and high temperature interleaving agent that the Q345 steel plate that 8～20mm is thick, diameter are 10～30mm are stand-by;
Connect a step, second step, hot rolling: adopting 3～4 fire that the Ti60 slab is rolled to thickness is 4～6mm, for pack ply-rolling provides the semifinished sheet blank;
Connect a step, the 3rd step, ply rolling pack work: according to the trimmed size of thin plate, Ti60 thin plate and Q345 steel plate are cut, cut the length and width precision and be (0 ,+5) mm, diagonal deviation≤5mm, then at Ti60 plate and the even coated with high temperature interleaving agent of Q345 surface of steel plate, use the Q345 steel plate as cladding plate, press from both sides 2～6 thick Ti60 central layers of 4～6mm between cladding plate, then with the Q345 steel bar, sealing is carried out in ply rolling bag four limits;
Connect a step, the 4th step, pack ply-rolling: blank charging temperature and holding temperature are 900～1050 ℃, temperature retention time is calculated with 1.2 ± 0.1min/mm, pass deformation rate is 8～25%, control finishing temperature >=600 ℃, then according to Ti60 finished product thickness specification difference, central layer/cladding plate deformation coefficient is 0.85～0.98, determine the pack ply-rolling target thickness by deformation coefficient, cladding plate thickness, Ti60 central layer gross thickness, should be the reserved 0.05～0.20mm sanding thickness surplus of Ti60 finished sheet simultaneously;
Connect a step, the 5th step, annealing: adopt air atmosphere to be annealed, after annealing sheet material is put neatly, top compacting 30～100mm common carbon steel board works the orthopedic effect of pressing, annealing sheet material charging temperature≤650 ℃, under charging temperature, preheating, after 1～3 hour, is warming up to 750～900 ℃ of annealing temperatures and is incubated, temperature retention time is 1～5 hour, according to annealing sheet material gross thickness, calculates;
Connect a step, the 6th step, sanding surface: under the tension force effect, adopt abrasive finishing method to remove Ti60 thin sheet surface oxide layer, at first use 80～180# abrasive band to carry out coarse sand light, then adopt 180～320# abrasive band to carry out washed ore light, finally use the above granularity abrasive material of 320# to carry out finishing polish;
Connect a step, the 7th step, pickling: pickle is comprised of hydrofluoric acid, nitric acid and water, and hydrofluoric acid (HF) mass concentration is 2.0～5.0%, nitric acid (HNO
3) mass concentration is 10.0～35.0%, ratio between the two is HF:HNO
3=1:(3～10);
Connect a step, the 8th step, product sizing are cut: by width and the excision of length burr, obtain trimmed size Ti60 thin plate.
2. the preparation method of Ti60 latten according to claim 1, it is characterized in that: in the second step hot-rolled step, wherein the charging temperature of heating once and rolling is 700～1000 ℃, under charging temperature after preheating 1～3h, furnace temperature is risen to 1000～1120 ℃ and be incubated, temperature retention time is calculated with 1.6 ± 0.2min/mm, and a quirk time deformation rate is between 5～26%, one fiery rolling process deformation rate 50～90%, be rolled to fiery target thickness a 15～40mm through 6～16 passages; Wherein two fiery rolling blank reconditionings: two sides whole peeling, polishing, the thorough removing of a fiery sheet material crackle is clean, and the blank surface reconditioning should be even, reconditioning pit depth<sotck thinkness 15%, depth-to-width ratio ≯ 1:10, answer >=80# of sized flap wheel is used in final polishing; Wherein two fiery rollings: two fire commutation rollings, 600～900 ℃ of charging temperatures, under charging temperature after preheating 0.5～1h, furnace temperature is risen to 900～1080 ℃ to be incubated, temperature retention time is calculated with 1.3 ± 0.2min/mm, two fiery rolling pass deformation rates are between 3～22%, and two fiery rolling process deformation rates 40～80%, be rolled to two fiery target thickness 8.0～12mm through 4～10 passages; Wherein three fiery rolling blank reconditionings: after sandblast, pickling, the check table planar defect, and Defect removal is clean, reconditioning pit depth<sotck thinkness 10%, depth-to-width ratio ≯ 1:10, answer >=100# of sized flap wheel is used in final polishing; Wherein three fiery rollings: blank charging temperature and holding temperature are 900～1050 ℃, temperature retention time is calculated with 1.2 ± 0.1min/mm, three fiery rolling pass deformation rates, between 2～20%, are controlled finishing temperature>600 ℃, through 6～12 passages, are rolled to three fiery target thickness 4～6mm; Wherein four fiery rollings: when needed, carry out four fiery rollings, concrete technology is with three fiery rollings; Wherein the fiery boards half-finished product of pack ply-rolling blank reconditioning: Ti60 tri-carries out local reconditioning after sandblast, pickling, and scarfing is clean, reconditioning pit depth<sotck thinkness 10%, depth-to-width ratio ≯ 1:10.
3. the preparation method of Ti60 latten according to claim 1, it is characterized in that: in the step 3 ply rolling packs work, three 30 ± 5mm width steam vents are reserved on each limit on described ply rolling bag four limits, lay respectively at centre and the two ends on every limit, need to use the hydraulic press compacting before assembly welding, make the laminating of ply rolling bag closely.
4. the preparation method of Ti60 latten according to claim 1 is characterized in that: in the step 6 sanding surface is processed, according to abrasive band and polish abrasive granularity difference, through sanding, the polishing surface roughness can carefully to 0.2～0.8 μ m.
5. the preparation method of Ti60 latten according to claim 1, it is characterized in that: in the step 7 pickling processes, pickling temperature is controlled at 40～55 ℃, pickling speed 3～10mm/min.
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