CN105921544A - Hot-processing production system for titanium and titanium alloy seamless tube, product prepared on basis of system and manufacture method for product - Google Patents

Hot-processing production system for titanium and titanium alloy seamless tube, product prepared on basis of system and manufacture method for product Download PDF

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Publication number
CN105921544A
CN105921544A CN201610332217.1A CN201610332217A CN105921544A CN 105921544 A CN105921544 A CN 105921544A CN 201610332217 A CN201610332217 A CN 201610332217A CN 105921544 A CN105921544 A CN 105921544A
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roll
pipe
temperature
high accuracy
titanium
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CN105921544B (en
Inventor
张志玉
那继业
刘怀玉
高万峰
石满鹰
冯永涛
李凤魁
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Xinpengyuan (Liaocheng) Intelligent Technology Co., Ltd
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Xinpengyuan Intelligent Equipment Group Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
    • B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
    • B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
    • B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
    • B21B19/06—Rolling hollow basic material, e.g. Assel mills
    • B21B19/10—Finishing, e.g. smoothing, sizing, reeling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
    • C22F1/18—High-melting or refractory metals or alloys based thereon
    • C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/02—Transverse dimensions
    • B21B2261/08—Diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/20—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2265/00—Forming parameters
    • B21B2265/12—Rolling load or rolling pressure; roll force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2267/00—Roll parameters
    • B21B2267/02—Roll dimensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2267/00—Roll parameters
    • B21B2267/02—Roll dimensions
    • B21B2267/06—Roll diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2275/00—Mill drive parameters
    • B21B2275/02—Speed
    • B21B2275/04—Roll speed

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Forging (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

The invention relates to a hot-processing production system for a titanium and titanium alloy seamless tube, a seamless tube prepared by using the hot-processing production system and a hot-processing production method for the seamless tube, and belongs to the technical field of titanium and titanium alloy seamless tube production. By improving various units and all kinds of auxiliary equipment, particularly, reselecting materials of parts and heating and rolling working modes thereof, thus the equipment precision is improved and the stability of the system is controlled, and a rolling process is enabled to be more stable, thereby ensuring that the quality and size of the inner and outer surfaces of the seamless tube are stable. On such basis, according to the hot-processing production method, various working procedures are arranged reasonably and efficiently, and a tube blank is coated with a protective layer before heating, so that the problem that the tube blank reacts with oxygen and nitrogen and absorbs hydrogen is well solved, the defect of exceeding standards does not occur in the tube blank and a foundation is laid for subsequent rolling.

Description

The hot-working production system of titanium or titanium alloy seamless pipe, the product prepared based on this system and the manufacture method of this product
Technical field
The present invention relates to the hot-working production system of titanium or titanium alloy seamless pipe, the seamless pipe utilizing this hot-working production system to prepare and the hot-working production method of this seamless pipe, belong to titanium or titanium alloy seamless pipe production technical field.
Background technology
Titanium or titanium alloy seamless pipe light weight, intensity are high, mechanical performance is superior.It is mainly used in making aircraft engine compressor part and the structural member of rocket, guided missile and high-speed aircraft, the electrode of electrolytic industry, the industry manufacture field such as the heater of the condenser of electric station, petroleum refining and desalinization and environment pollution control device.The main of titanium or titanium alloy seamless pipe bores bore hole or three class production systems of the tiltedly cold rolling cold-drawn in pierce through hole by extruded, pipe.Extruded lumber recovery is low, poor dimensional precision, and production cost is high；It is preferable that pipe bores bore size precision, but processing cost is high, and production efficiency and lumber recovery are low；Although cold rolling cold-drawn lumber recovery is higher after roll piercing, but under such titanium alloy room temperature, intensity is high, plasticity is poor, and cold roller and deformed drag is big, needs the most repeatedly to anneal, and production efficiency is low, and production cost is high.Therefore modern production needs a kind of production system energy-conservation, efficient for titanium or titanium alloy seamless pipe.
Titanium or titanium alloy is compared with copper, aluminum, ferrum and nickel, and the thermal conductivity of titanium or titanium alloy is low, and hot worked main difficulty is: when using surface heating means, heat time heating time is considerably long.Seamless pipe is big to large-scale heating of pipe blank, section temperature difference when producing.When improving temperature, titanium or titanium alloy pipe can be with air generation strong reaction.When heating more than 650 DEG C, titanium or titanium alloy pipe and oxygen kickback, and time more than 700 DEG C, also react with nitrogen, formed and relatively deeply felt surface layer by both gas institute inclusion.Nitrogen content often reduces by 0.01%, and titanium or titanium alloy pipe intensity reduces 29MPa, plasticity improves 1%-2%, pipe be mingled with and segregation reduces, raw pipe in turning, forge, bore a hole, the course of processing such as rolling is just difficult to production crack defect.Therefore how to weaken in hot procedure the chemical reaction between titanium or titanium alloy and air, it is the maximum technical problem that faces when producing of titanium or titanium alloy seamless pipe.
Summary of the invention
In order to solve the problems referred to above, the invention provides the hot-working production system of titanium or titanium alloy seamless pipe, the seamless pipe utilizing this hot-working production system to prepare and the hot-working production method of this seamless pipe, the energy utilization rate of this production system and production efficiency height, low cost, the production method of titanium or titanium alloy seamless pipe under this production system basis, product quality and qualification rate are the highest, are suitable for the production all kinds of trades mark, the titanium or titanium alloy seamless pipe of needles of various sizes.
The hot-working production system of titanium or titanium alloy seamless pipe, including following equipment:
Centring machine, it for processing internal point to bore a hole at titanium or titanium alloy pipe two ends；
Annular furnace, it is used for heating titanium or titanium alloy pipe；
Centering cone mill group in machine in high precision, it is for obtaining hollow billet to pipe drilling/rolling, including centering Horizontal type fungi formula perforating machine in feel relieved in high accuracy machine vertical cone mill or high accuracy machine；The roll material of centering Horizontal type fungi formula perforating machine in vertical cone mill and high accuracy machine of feeling relieved in described high accuracy machine is 60CrMnMo and modifier treatment HB229-255, top material be molybdenio specialty alloys, guide plate material be Langaloy, push rod material be 1Cr5MO thick-wall seamless；In described high accuracy machine interior feel relieved vertical cone mill or high accuracy machine, centering Horizontal type fungi formula perforating machine is equipped with regulating enclasping force and the robot brain of opening degree between roll according to as-rolled condition.
The multi-functional re-entrant trough profiled steel sheeting of retained mandrel in high precision, its wall thickness reducing amount is 2.6mm, drafts is 10%, mill speed is 0.4m/s, and roll knurl depth is 0.3mm, including type I and type II；It obtains hollow forging for wall thickness expanding, equal to hollow billet secondary finish rolling, extension to improve hollow billet surfaces externally and internally quality and material structure performance；The roll material of described type I and type II is 40CrNiMo, and plug material is 42CrMo, and rolling sheets matter is Langaloy；
Frequency Induction Heating formula high accuracy sizing unit, it is for rolling as production tube by hollow forging, including three-roller type nine frame Frequency Induction Heating formula high accuracy sizing mill and combined type sizing unit, described combined type sizing unit includes three-roller type five frame Frequency Induction Heating formula high accuracy sizing mill and three-roller type seven frame Frequency Induction Heating formula high accuracy sizing mill；
Mobile device, it is for transferring pipe, hollow billet, hollow forging and finished product seamless pipe between corresponding operation；
Straightener, it reaches criterion of acceptability for the flexibility of thermal straightening production tube；
Ultrasonic flaw detection equipment, it is for production tube ultrasonic examination；
Intelligent temperature control system, it is for detecting and regulate temperature when each equipment produces.
The production system of above-mentioned titanium or titanium alloy seamless pipe, described mobile device includes intelligent heat preserving tunnel and the quick transfer device of body；Described intelligent temperature control system includes annular furnace point for measuring temperature, perforation unit point for measuring temperature, re-entrant trough profiled steel sheeting testing temperature point, sizing unit point for measuring temperature, straightener point for measuring temperature and maintenance tunnel point for measuring temperature；
Described intelligent heat preserving tunnel is provided with 2 groups, one of which pipe after annular furnace is heated is transplanted on centering cone mill group station in high accuracy machine, and another group is transplanted on Frequency Induction Heating formula high accuracy sizing unit for the hollow forging that multi-functional for high accuracy retained mandrel re-entrant trough profiled steel sheeting station is obtained；Described maintenance tunnel includes by sheet metal shell, the partition wall made of welding and is made liner by aluminous refractory, is provided with alumina silicate fiber felt and diatom, cob brick are made heat-insulation layer between described shell and liner；
The quick transfer device of described body is provided with 2 groups, and one of which is for being transplanted on high accuracy retained mandrel multi-functional re-entrant trough profiled steel sheeting station the hollow billet after cone mill group station rolling of feeling relieved in high accuracy machine.
The production system of above-mentioned titanium or titanium alloy seamless pipe, the parameter of corresponding machine equipment is as follows:
The central diameter of described annular furnace is 24 meters, furnace width is 4.6 meters, be suitable for pipe specification Φ 90-310mm, maximum operation (service) temperature 1320 DEG C, fuel are natural gas, average fuel consumption 3000m/h；
In described high accuracy machine, the roller diameter of the vertical cone mill of centering is 700-800mm, roll footage is 700mm, roll inlet angle is 2.5 °, roll exit angle is 3 °, the a length of 320mm of roll approach cone, roll exit bores a length of 380mm, roll transition band width 5mm, roll feed angle 8-13 °, roll rolling angle 15 °, roll rotational speed is 48-106r/min, mill roll-gap maximum open is 210mm, dolly maximum translational speed 2.5m/s, punching rate 0.6-0.8m/s, roll-force is 1600kN, maximum rolling force square is 200kN m；Feel relieved in described high accuracy machine vertical cone mill equipped with 2 power be 2200KW, rotating speed be the mair motor of 550-750r/min；
In described high accuracy machine the roller diameter of centering Horizontal type fungi formula perforating machine be 1040-1200mm, a length of 1000mm, roll off angle be 12.5 °, roll feed angle be 8 °, roll surface approach cone angle be 2.5 °, roll surface outlet cone angle be 3 °, roll maximum opening degree be 490mm, roll rotational speed 45-100r/min, single roller maximum rolling force square be 650kN, milling train maximum rolling force be 5000kN；In described high accuracy machine centering Horizontal type fungi formula perforating machine equipped with 4 power be 1500kW, overload factor be the mair motor of 2.4；
The roller diameter of described type I is 700-800mm, roll footage is 700mm, roll send roll angle be 8 °, roll roll off angle be 5 °, roll rotational speed 105-157r/min, maximum rolling force square be 230kN m, maximum rolling force be 2870kN；
The roller diameter of described type II is 1100-1200mm, roll footage is 1000mm, roll rotational speed 63-130r/min, feed angle are 8 °；Described type II equipped with 4 power be 1250kW, rotating speed be 320-600r/min, speed reducing ratio be the mair motor of 4.538；
The entrance hollow forging speed of described three-roller type nine frame Frequency Induction Heating formula high accuracy sizing mill is 0.4-0.7m/s, roller diameter is 480mm, roll width is 180mm, single chassis maximum reducing rate is 3.3%, maximum rolling force is 130.5kN, roll torque is 4.7kN m；
The entrance velocity of described three-roller type five frame Frequency Induction Heating formula high accuracy sizing mill is 0.3-0.9m/s, roller diameter is 670mm, roll width is 390mm, frame spacing is 630mm, single chassis maximum reducing rate is 3.3%, maximum rolling force is 500kN；Described three-roller type five frame Frequency Induction Heating formula high accuracy sizing mill equipped with 5 power be 250kW, rotating speed be the mair motor of 500-1000r/min；
The entrance velocity of described three-roller type seven frame Frequency Induction Heating formula high accuracy sizing mill is 0.4-0.7m/s, and roll nominal diameter is 530mm, roll width is 250mm or 310mm, single chassis maximum reducing rate is 3.3%, unit maximum reducing rate is 10%；Described three-roller type seven frame Frequency Induction Heating formula high accuracy sizing mill equipped with 9 power be 147kW, overload factor be the mair motor of 1.6.
Utilize the titanium or titanium alloy seamless pipe that the production system of above-mentioned titanium or titanium alloy seamless pipe prepares, it is the seamless pipe of TA1, TA2, TA3, TA4, TA5, TA6, TA7, TA8, TA8-1, TA9, TA9-1, TA10, TA13, TA15, TA18, TC1, TC2, TC3, TC4, TC10 including the trade mark, a diameter of 73-325mm of described seamless pipe, wall thickness is 5.5-25.0mm, and length is 13500mm to the maximum.
The hot-working production method of the above-mentioned titanium or titanium alloy seamless pipe related to, including following operation:
1) blanking: titanium or titanium alloy blank is cut off by the length of production requirement, and the blank after cutting off is worked into corresponding outside dimension by production requirement, ensureing surface roughness Ra≤3.2 μm after its processing, blanking completes to obtain qualified titanium alloy pipe simultaneously；
2) internal point: use centring machine to process internal point in the both ends of the surface of pipe；
3) brushing protective coating: at the external coating protective coating of pipe；
4) heating: pipe is placed in zone heating in annular furnace, and low temperature section firing rate at a slow speed is 10min/cm, high temperature quick fraction firing rate is 7min/cm；Micro-oxidizing atmosphere heating and thermal insulation；Burner hearth pressure-fired；Described low temperature section at a slow speed includes preheating section 500 DEG C-650 DEG C, heating I section 650 DEG C-800 DEG C, heating II section 800-1000 DEG C and heating III section 1000 DEG C-1080 DEG C；Described high temperature quick fraction includes soaking zone, wherein, the trade mark is that the heating samming of TA1, TA2, TA3, TA4, TA5, TA6 and TA7 pipe is 960-985 DEG C, the trade mark is that the heating samming of TA8, TA8-1, TA9, TA9-1, TA10, TA13, TA15, TA18 pipe is 1000-1020 DEG C, and the trade mark is that TC1, TC2, TC3, TC4, TC10 heating of pipe blank samming is 1000-1070 DEG C；Drop temperature 950 DEG C-1120 DEG C；
5) perforation: in pipe being transplanted on high accuracy machine by intelligent heat preserving tunnel, centering cone mill group is to obtain hollow billet to pipe perforation；Wherein, preperforative blank temperature is 920-1050 DEG C, temperature 960-1120 DEG C in perforation procedure, hollow billet temperature 930-1080 DEG C after perforation；
6) finish rolling: hollow billet is transplanted on the high accuracy multi-functional re-entrant trough profiled steel sheeting of retained mandrel by the quick transfer device of body and obtains hollow forging so that hollow billet is carried out secondary finish rolling；Wherein, hollow billet temperature 880-1050 DEG C before finish rolling, temperature 930-1010 DEG C in tube rolling journey, hollow forging temperature 830-980 DEG C after finish rolling；
7) sizing: hollow forging is transplanted on Frequency Induction Heating formula high accuracy sizing unit to determine that final outside dimension obtains finished product seamless pipe by intelligent heat preserving tunnel；Maximum heating temperature in this operation is 1100 DEG C, and before sizing, hollow forging temperature is 850-980 DEG C, and after sizing, finished product seamless pipe temperature is 760-840 DEG C, closes cooling water in Sizing Process；
Wherein, the Frequency Induction Heating maximum heating temperature in this operation is 1100 DEG C, and before sizing, hollow forging temperature is 860-980 DEG C, and after sizing, finished product seamless pipe temperature is 760-840 DEG C；
8) thermal straightening: by body quick transfer device finished product seamless pipe is transplanted in straightener and carries out thermal straightening, and repeatedly aligned by circulation roller-way, make the flexibility≤1.0mm of finished product seamless pipe and total length flexibility be not more than the 0.10% of titanium pipe total length；Finished product seamless pipe temperature before aligning is 550-650 DEG C, temperature is 350-440 DEG C after aligning；
9) sawing: the two ends cutting processing to seamless pipe, reaches the requirement of finished product seamless pipe；
10) sandblasting: the surfaces externally and internally of finished product seamless pipe is carried out blasting treatment, to improve presentation quality；
11) nondestructive inspection: finished product seamless pipe is carried out ultrasonic examination by ultrasonic flaw detection equipment, rejects and has the crackle exceeded standard, layering, sand holes and fall the defective seamless pipe of hole defect；
12) desk checking and packaging warehouse-in: test chemical composition, physical property and the hydraulic pressure of finished product seamless pipe, measures and record appearance quality, external diameter, ovality, wall thickness, length and the straight degree of seamless pipe in blocks, packs warehouse-in afterwards.
Above-mentioned hot-working production method, in step 3), the method for described brushing protective coating is: after ethanol and Electric brush of bristles cleaning pipe surface, spraying ground floor protective coating, after pipe is placed 12h, then brush second layer protective coating, the most again pipe is placed 12h；Described ground floor protective coating thickness is 160-280 μm, and described second layer protective coating thickness is 90-140 μm.
Above-mentioned hot-working production method, in step 1), the outside dimension of described pipe includes Φ 90mm, Φ 160mm, Φ 180mm, Φ 210mm, Φ 230mm, Φ 250mm, Φ 280mm and Φ 310mm, and its diameter tolerance is respectively Φ 90 ± 1.6mm, Φ 160 ± 1.6mm, Φ 180 ± 2.0mm, Φ 210 ± 1.8mm, Φ 230 ± 1.8mm, Φ 250 ± 2.0mm, Φ 280 ± 2.0mm and Φ 310 ± 2.0mm, ovality diameter tolerance ± 1mm, length tolerance 0-+50mm, end face are cut gradient and be not more than 5mm, flexibility every meter less than 5mm.
Above-mentioned hot-working production method, step 2) in, the size of described internal point determines according to pipe outside dimension: outside dimension is a diameter of 20mm of internal point of Φ 90mm, Φ 160mm and Φ 180mm, the degree of depth is 20mm, chamfering is R5, outside dimension is a diameter of 30mm of internal point of Φ 210mm and Φ 230mm, the degree of depth is 30mm, chamfering is R5, and outside dimension is a diameter of 35mm of internal point of Φ 250mm, Φ 280mm and Φ 310mm, the degree of depth is 35mm, chamfering is R5.
The invention have the benefit that
1, after the hot-working production system of this invention, opposing compression molding and brill boring process, the cost reduction by 50% of cold rolling cold-drawing technology, relatively conventional extrusion forming process production efficiency significantly improve.Hot worked short route realizes high efficiency, and lumber recovery has reached 97%, and titanium material utilization rate relatively conventional brill Boring raising simultaneously more than 30% is somebody's turn to do, and the production line of production system is suitable for the seamless pipe of most titanium or titanium alloy material and produces.By each unit and all kinds of auxiliary equipment are transformed, the particularly material of parts and again selecting of its heating rolling working method, thus come hoisting device precision and stability of control system, make the operation of rolling more stable, thus ensure to roll rear product surfaces externally and internally quality and dimensionally stable.
2, the finished product seamless pipe kind utilizing the production system of this invention to obtain is many, intensity and precision high, can be directly used for polish.
3, the hot-working production method of this invention, arranges between each operation the most efficiently, brushing overcoat before heating of pipe blank, well solves pipe and reacts with oxygen, nitrogen and inhale hydrogen problem, does not haves the defect exceeded standard, carry out basis for follow-up rolling in pipe.Annular furnace uses multistage subsection mode of heating, first slow for blank zone heating, is then heated rapidly to samming, solve the problem that hydrogen is serious of inhaling under pipe high temperature.Annular furnace heating process, perforation process and finishing rolling step operation strictly control from transport, the time of shove charge to discharging and temperature, optimizes the processing technique of product, it is ensured that product quality.The production method of the present invention has been captured non-ferrous metal two roller oblique milling calendering formation and has been produced the technical bottleneck of large-calibre seamless pipe.
Accompanying drawing explanation
Fig. 1 is the structural representation of the hot-working production system of the present invention；
Fig. 2 is the flow chart of the hot-working production method of the present invention.
In figure: 1 is centring machine, 2 is annular furnace, 3 is centering cone mill group in high accuracy machine, 4 is the high accuracy multi-functional re-entrant trough profiled steel sheeting of retained mandrel, 5 is Frequency Induction Heating formula high accuracy sizing unit, and 6 is straightener, and 7 is ultrasonic flaw detection equipment, 8 is intelligent heat preserving tunnel, and 9 is the quick transfer device of body.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is further explained.
Embodiment 1
The hot-working production system of titanium or titanium alloy seamless pipe, including following equipment:
Centring machine 1, its at titanium or titanium alloy pipe two ends processing internal point so that drilling/rolling；
Annular furnace 2, it is used for heating titanium or titanium alloy pipe；
Centering cone mill group 3 in machine in high precision, it is for obtaining hollow billet to pipe drilling/rolling, including centering Horizontal type fungi formula perforating machine in centering vertical cone mill, in high precision machine in high accuracy machine and can be according to as-rolled condition regulation Centering Roll enclasping force and the robot brain of opening degree；The roll material of centering Horizontal type fungi formula perforating machine in vertical cone mill and high accuracy machine of feeling relieved in described high accuracy machine is 60CrMnMo and modifier treatment HB229-255, top material is adopted as specialty alloys, guide plate material is Langaloy, and push rod material is 1Cr5MO thick-wall seamless；The roll of this two classes perforating machine uses high chromium guide plate before using 45# steel, guide plate before using 55Mn, push rod in the past, and the present invention has changed corresponding material can preferably adapt to the rolling deformation characteristic of titanium and alloy thereof；
The multi-functional re-entrant trough profiled steel sheeting of retained mandrel 4 in high precision, its wall thickness reducing amount is 2.6mm, drafts is 10%, mill speed is 0.4m/s, and roll knurl depth is 0.3mm, including type I and type II；It obtains hollow forging for wall thickness expanding, equal to hollow billet secondary finish rolling, extension to improve hollow billet surfaces externally and internally quality and material structure performance；The roll material of described type I and type II is 40CrNiMo, and plug material is 42CrMo, and rolling sheets matter is Langaloy；
Frequency Induction Heating formula high accuracy sizing unit 5, it is for rolling as production tube by hollow forging, including three-roller type nine frame Frequency Induction Heating formula high accuracy sizing mill and combined type sizing mill, described combined type sizing mill includes three-roller type five frame Frequency Induction Heating formula high accuracy sizing mill and three-roller type seven frame Frequency Induction Heating formula high accuracy sizing mill.Titanium alloy thermal coefficient of expansion is little, the resistance of deformation of titanium that temperature is low can sharply increase, before so employing Frequency Induction Heating mode guarantees sizing, the temperature-averaging of titanium or titanium alloy, reduces the resistance of deformation of titanium, ensures the integrated performance index of titanium or titanium alloy pipe after rolling；
Mobile device, it is for transferring pipe, hollow billet, hollow forging and finished product seamless pipe between corresponding operation；
Straightener 6, it reaches criterion of acceptability for the flexibility of thermal straightening production tube；
Ultrasonic flaw detection equipment 7, it is for production tube ultrasonic examination；
Intelligent temperature control system, it is for detecting and regulate temperature when each equipment produces.
The production system of above-mentioned titanium or titanium alloy seamless pipe, described mobile device includes intelligent heat preserving tunnel 8 and the quick transfer device of body 9；Described intelligent temperature control system includes annular furnace point for measuring temperature, perforation unit point for measuring temperature, re-entrant trough profiled steel sheeting testing temperature point, sizing unit point for measuring temperature, straightener point for measuring temperature and maintenance tunnel point for measuring temperature；
Described intelligent heat preserving tunnel 8 is provided with 2 groups, one of which pipe after annular furnace 2 is heated is transplanted on centering cone mill group 3 station in high accuracy machine, and another group is transplanted on Frequency Induction Heating formula high accuracy sizing unit 5 for the hollow forging that multi-functional for high accuracy retained mandrel re-entrant trough profiled steel sheeting 4 station is obtained.Described maintenance tunnel 8 includes by sheet metal shell, the partition wall made of welding and is made liner by aluminous refractory, is provided with alumina silicate fiber felt and diatom, cob brick are made heat-insulation layer between described shell and liner；So ensure that titanium or titanium alloy transmit between each rolling process during temperature control, the highest holding temperature is 1000 DEG C, can be automatically adjusted temperature, thermoregulation range 200-1000 DEG C according to the temperature characterisitic of the material of titanium or titanium alloy.
The quick transfer device of described body 9 is provided with 2 groups, one of which is for being transplanted on high accuracy retained mandrel multi-functional re-entrant trough profiled steel sheeting 4 station the hollow billet after cone mill group 3 station rolling of feeling relieved in high accuracy machine, and another group is for being transplanted on straightener 6 station the production tube obtained at Frequency Induction Heating formula high accuracy sizing unit 5 station.Oblique grid section before and turn-down rig are changed into the quick transfer device of body 9, shortens the transfer time, reduce hollow billet cooling.
The production system of above-mentioned titanium or titanium alloy seamless pipe:
The central diameter of described annular furnace 2 is 24 meters, furnace width is 4.6 meters, be suitable for pipe specification Φ 90-310mm, maximum operation (service) temperature 1320 DEG C, fuel are natural gas, average fuel consumption 3000m/h；
In described high accuracy machine, the roller diameter of the vertical cone mill of centering is 700-800mm, roll footage is 700mm, roll inlet angle is 2.5 °, roll exit angle is 3 °, the a length of 320mm of roll approach cone, roll exit bores a length of 380mm, roll transition band width 5mm, roll feed angle 8-13 °, roll rolling angle 15 °, roll rotational speed is 48-106r/min, mill roll-gap maximum open is 210mm, dolly maximum translational speed 2.5m/s, punching rate 0.6-0.8m/s, roll-force is 1600kN, maximum rolling force square is 200kN m；Feel relieved in described high accuracy machine vertical cone mill equipped with 2 power be 2200KW, rotating speed be the mair motor of 550-750r/min；
In described high accuracy machine the roller diameter of centering Horizontal type fungi formula perforating machine be 1040-1200mm, a length of 1000mm, roll off angle be 12.5 °, roll feed angle be 8 °, roll surface approach cone angle be 2.5 °, roll surface outlet cone angle be 3 °, roll maximum opening degree be 490mm, roll rotational speed 45-100r/min, maximum rolling force be 5000kN, single roll maximum rolling force square be 650kN m；In described high accuracy machine centering Horizontal type fungi formula perforating machine equipped with 4 power be 1500kW, overload factor be the mair motor of 2.4；
The roller diameter of described type I is 700-800mm, roll footage is 700mm, roll send roll angle be 8 °, roll roll off angle be 5 °, roll rotational speed 105-157r/min, maximum rolling force be 2870kN, maximum rolling force square be 230kN m；
The roller diameter of described type II is 1100-1200mm, roll footage is 1000mm, roll rotational speed 63-130r/min, feed angle are 8 °；Described type II equipped with 4 power be 1250kW, rotating speed be 320-600r/min, speed reducing ratio be the mair motor of 4.538；
The entrance hollow forging speed of described three-roller type nine frame Frequency Induction Heating formula high accuracy sizing mill is 0.4-0.7m/s, muzzle velocity is 0.4-0.9m/s, roller diameter is 480mm, roll width is 180mm, single chassis maximum reducing rate is 3.3%, maximum rolling force is 130.5kN, maximum rolling force square is 4.7kN m；
The entrance velocity of described three-roller type five frame Frequency Induction Heating formula high accuracy sizing mill is 0.3-0.9m/s, roller diameter is 670mm, roll width is 390mm, frame spacing is 630mm, single chassis maximum reducing rate is 3.3%, maximum rolling force is 500kN；Described three-roller type five frame Frequency Induction Heating formula high accuracy sizing mill equipped with 5 power be 250kW, rotating speed be the mair motor of 500-1000r/min；
The entrance velocity of described three-roller type seven frame Frequency Induction Heating formula high accuracy sizing mill is 0.4-0.7m/s, and outlet finished product seamless pipe speed is 0.4-0.9m/s, roll nominal diameter is 530mm, roll width is 250mm or 310mm, single chassis maximum reducing rate is 3.3%, unit maximum reducing rate is 10%；Described three-roller type seven frame Frequency Induction Heating formula high accuracy sizing mill equipped with 9 power be 147kW, overload factor be the mair motor of 1.6.
Embodiment 2
Utilize the titanium or titanium alloy seamless pipe that the production system of titanium or titanium alloy seamless pipe described in embodiment 1 prepares, it is the seamless pipe of TA1, TA2, TA3, TA4, TA5, TA6, TA7, TA8, TA8-1, TA9, TA9-1, TA10, TA13, TA15, TA18, TC1, TC2, TC3, TC4, TC10 including the trade mark, a diameter of 73-325mm of described seamless pipe, wall thickness is 5.5-25.0mm, a length of is 135000mm that is 13.5 meter to the maximum.
The titanium or titanium alloy of every kind of trade mark its organizational structure, chemical composition etc. are had any different, and the present embodiment, under the production system that embodiment 1 provides, can get the multiple trade mark, the titanium or titanium alloy seamless pipe of specification, meets the market demand.
Embodiment 3
The hot-working production method of the titanium or titanium alloy seamless pipe described in above-described embodiment 2 includes following operation:
1) blanking: titanium or titanium alloy blank is cut off by the length of production requirement, and the blank after cutting off is worked into corresponding outside dimension by production requirement, ensureing surface roughness Ra≤3.2 μm after its processing, blanking completes to obtain qualified titanium alloy pipe simultaneously；
2) internal point: use centring machine 1 to process internal point in the both ends of the surface of pipe；
3) brushing protective coating: at the external coating protective coating of pipe；
4) heating: pipe is placed in annular furnace 2 heating, micro-oxidizing atmosphere heating and thermal insulation, burner hearth pressure-fired；Wherein, the trade mark is that the heating samming of TA1, TA2, TA3, TA4, TA5, TA6 and TA7 pipe is 960-985 DEG C, the trade mark is that the heating samming of TA8, TA8-1, TA9, TA9-1, TA10, TA13, TA15, TA18 pipe is 1000-1020 DEG C, and the trade mark is that TC1, TC2, TC3, TC4, TC10 heating of pipe blank samming is 1000-1070 DEG C；Use zone heating: blank is heated slowly to, is then heated rapidly to required temperature；Solve the low problem serious with air-breathing under high temperature of the thermal conductivity of titanium or titanium alloy in heating process.Necessary strict implement techniques below specification during heat:
The most strictly heat by heating cycle, it is impossible to exceed ceiling temperature more than 5 DEG C；
2., when titanium or titanium alloy pipe forwards discharging fire door to, three burners on discharging opening to be turned down or close, it is ensured that be adjusted to rolling requirements temperature；
3. every discharging one will fall furnace bottom in time, makes material return inside partition wall；
4. during rolling discharging, close flue damper, make burner hearth ensure the burner hearth pressure of rolling requirements；
5. low-temperature zone slow heat speed 10min/cm, high temperature section fast heating rates 7min/cm, is strictly implemented by heating cycle requirement from shove charge to discharging time；
In annular furnace 2, the temperature of bringing-up section is set as: the low temperature stage at a slow speed includes preheating section 500 DEG C-650 DEG C, heating I section 700 DEG C-800 DEG C, heating II section 800-1000 DEG C and heating III section 1000 DEG C-1080 DEG C；Drop temperature 950 DEG C-1120 DEG C；
5) perforation: in pipe being transplanted on high accuracy machine by intelligent heat preserving tunnel 8, centering cone mill group 3 is to obtain hollow billet to pipe perforation；Wherein, preperforative blank temperature is temperature 960-1120 DEG C in 920-1050 DEG C of perforation procedure, hollow billet temperature 930-1080 DEG C after perforation；
6) finish rolling: hollow billet is transplanted on the high accuracy multi-functional re-entrant trough profiled steel sheeting of retained mandrel 4 by the quick transfer device of body 9 and obtains hollow forging so that hollow billet is carried out secondary finish rolling；Wherein, hollow billet temperature 880-1050 DEG C before finish rolling, temperature 930-1010 DEG C in tube rolling journey, hollow forging temperature 830-980 DEG C after finish rolling；
7) sizing: hollow forging is transplanted on Frequency Induction Heating formula high accuracy sizing unit 5 to determine that final outside dimension obtains finished product seamless pipe by intelligent heat preserving tunnel 8；Wherein, the maximum heating temperature in this operation is 1100 DEG C, and before sizing, hollow forging temperature is 860-980 DEG C, and after sizing, finished product seamless pipe temperature is 760-840 DEG C；Sizing Process closes cooling water, it is ensured that Sizing Process homogeneous temperature；
8) thermal straightening: by the quick transfer device of body 9 finished product seamless pipe is transplanted in straightener 6 and carries out thermal straightening, and repeatedly aligned by circulation roller-way, make the flexibility≤1.0mm of finished product seamless pipe；Finished product seamless pipe temperature before aligning is 550-650 DEG C, temperature is 350-440 DEG C after aligning；It is transported on cold bed continue to rotate at a slow speed cooling by the seamless pipe after aligning, it is ensured that the linear precision of final products；
9) sawing: the two ends cutting processing to seamless pipe, reaches the requirement of finished product seamless pipe；
10) sandblasting: the surfaces externally and internally of finished product seamless pipe is carried out blasting treatment, to improve presentation quality；
11) nondestructive inspection: finished product seamless pipe is carried out ultrasonic examination by ultrasonic flaw detection equipment 7, rejects and has the crackle exceeded standard, layering, sand holes and fall the defective seamless pipe of hole defect；
12) desk checking and packaging warehouse-in: test chemical composition, physical property and the hydraulic pressure of finished product seamless pipe, measures and record appearance quality, external diameter, ovality, wall thickness, length and the straight degree of seamless pipe in blocks, packs warehouse-in afterwards.
Concrete, above-mentioned hot-working production method, in step 3), the method of described brushing protective coating is: after ethanol and Electric brush of bristles cleaning pipe surface, spray ground floor protective coating, after pipe is placed 12h, brush second layer protective coating again, the most again pipe is placed 12h；Described ground floor protective coating thickness is 160-280 μm, and described second layer protective coating thickness is 90-140 μm.
Concrete, above-mentioned hot-working production method, in step 1), the outside dimension of described pipe includes Φ 90mm, Φ 160mm, Φ 180mm, Φ 210mm, Φ 230mm, Φ 250mm, Φ 280mm and Φ 310mm, and its diameter tolerance is respectively Φ 90 ± 1.6mm, Φ 160 ± 1.6mm, Φ 180 ± 2.0mm, Φ 210 ± 1.8mm, Φ 230 ± 1.8mm, Φ 250 ± 2.0mm, Φ 280 ± 2.0mm and Φ 310 ± 2.0mm；Ovality diameter tolerance ± 1mm；Length tolerance 0-+50mm；End face is cut gradient and is not more than 5mm；Flexibility every meter is less than 5mm.
Concrete, above-mentioned hot-working production method, step 2) in, the size of described internal point determines according to pipe outside dimension: outside dimension is a diameter of 20mm of internal point of Φ 90mm, Φ 160mm and Φ 180mm, the degree of depth is 20mm, chamfering is R5, outside dimension is a diameter of 30mm of internal point of Φ 210mm and Φ 230mm, the degree of depth is 30mm, chamfering is R5, and outside dimension is a diameter of 35mm of internal point of Φ 250mm, Φ 280mm and Φ 310mm, the degree of depth is 35mm, chamfering is R5.
Illustrate, as a example by the processing method of the trade mark titanium alloy seamless pipe as TC10, the hot-working production method that the present invention relates to below.
Embodiment 3.1
The TC10 titanium alloy seamless pipe hot-working production method of the present embodiment, comprises the following steps:
1) blanking: the TC10 titanium alloy blank of Φ 250mm is cut off, a length of 2150mm, processing roughness Ra≤3.2, rear surface μm, its diameter tolerance are Φ 250 ± 2.0mm, ovality diameter tolerance ± 1mm, length tolerance 0-+50mm, end face are cut gradient and be not more than 5mm, flexibility every meter less than 5mm, and blanking completes to obtain qualified titanium alloy pipe；
2) internal point: use centring machine 1 to process internal point in the both ends of the surface of pipe；The a diameter of 35mm of described internal point, the degree of depth are 35mm, chamfering is R5；
3) brushing protective coating: after ethanol and Electric brush of bristles cleaning pipe surface, spray ground floor protective coating, after pipe is placed 12h, then brush second layer protective coating, the most again pipe is placed 12h；Described ground floor protective coating thickness is 160-200 μm, and described second layer protective coating thickness is 90-110 μm；
4) heating: pipe is placed in zone heating in annular furnace 2, micro-oxidizing atmosphere heating and thermal insulation, burner hearth pressure-fired, and low temperature section firing rate at a slow speed is 10min/cm, high temperature quick fraction firing rate is 7min/cm；In the present embodiment, described low temperature section at a slow speed includes preheating section 550-600 DEG C, heating I section 670-750 DEG C, heats II section 800-870 DEG C, heating III section 900-1000 DEG C, and quick bringing-up section is soaking zone 1000-1020 DEG C, and discharging opening temperature is 960-1050 DEG C；Seamless pipe production method compared to the most same specification, the present embodiment the temperature of each heating period is relatively low can the effectively save energy, drop temperature is low is to ensure that the blank temperature before next operation because have employed intelligent heat preserving tunnel 8 in course of conveying thereafter, improves crudy and energy utilization rate；
5) perforation: in pipe being transplanted on high accuracy machine by intelligent heat preserving tunnel 8, centering cone mill group 3 is to obtain hollow billet to pipe perforation；172mm is stretched on blank diameter drafts 32mm, top front reduction ratio 5.6%, roll spacing 218mm, top, and the most preperforative blank temperature is 950-1000 DEG C, temperature 960-1020 DEG C in perforation procedure, hollow billet temperature 940-970 DEG C after perforation；
6) finish rolling: hollow billet is transplanted on the high accuracy multi-functional re-entrant trough profiled steel sheeting of retained mandrel 4 by the quick transfer device of body 9 and obtains hollow forging so that hollow billet is carried out secondary finish rolling；Supplied materials diameter drafts 20mm, subtract wall 2.0mm, enlarging rate 11.2%, wherein hollow billet temperature 924-946 DEG C before finish rolling, temperature 943-950 DEG C in tube rolling journey, hollow forging temperature 915-938 DEG C after finish rolling；
7) sizing: hollow forging is transplanted on Frequency Induction Heating formula high accuracy sizing unit 5 to determine that final outside dimension obtains finished product seamless pipe by intelligent heat preserving tunnel 8；Wherein, the Frequency Induction Heating heating-up temperature of this operation is 930 DEG C, and before sizing, hollow forging temperature is 860-870 DEG C, and after sizing, finished product seamless pipe temperature is 760-780 DEG C；
8) thermal straightening: by the quick transfer device of body 9 finished product seamless pipe is transplanted in straightener 6 and carries out thermal straightening, make the flexibility≤1.0mm of finished product seamless pipe；Finished product seamless pipe temperature before aligning is 550-600 DEG C, temperature is 350-390 DEG C after aligning；
9) sawing: the two ends cutting processing to seamless pipe, reaches the requirement of finished product seamless pipe；
10) sandblasting: the surfaces externally and internally of finished product seamless pipe is carried out blasting treatment, to improve presentation quality；
11) nondestructive inspection: finished product seamless pipe is carried out ultrasonic examination by ultrasonic flaw detection equipment 7, rejects and has the crackle exceeded standard, layering, sand holes and fall the defective seamless pipe of hole defect；
12) desk checking and packaging warehouse-in: test chemical composition, physical property and the hydraulic pressure of finished product seamless pipe, measures and record appearance quality, external diameter, ovality, wall thickness, length and the straight degree of seamless pipe in blocks, packs warehouse-in afterwards.By parameters such as the reduction ratio of relevant device, enlarging rates when adjustment perforation, finish rolling and sizing operation, the seamless pipe specification that the present embodiment blanking pipe processes is: Φ 245 × 12mm, length 11.77m.
Embodiment 3.2
The TC10 titanium alloy seamless pipe hot-working production method of the present embodiment, comprises the following steps:
1) blanking: the TC10 titanium alloy blank of Φ 280mm is cut to length 1900mm, surface roughness Ra≤3.2 μm, its diameter tolerance after processing are Φ 280 ± 2.0mm, ovality diameter tolerance ± 1mm, length tolerance 0-+50mm, end face are cut gradient and be not more than 5mm, flexibility every meter less than 5mm, and blanking completes to obtain qualified titanium alloy pipe；
2) internal point: use centring machine 1 to process internal point in the both ends of the surface of pipe；The a diameter of 35mm of described internal point, the degree of depth are 35mm, chamfering is R5；
3) brushing protective coating: after ethanol and Electric brush of bristles cleaning pipe surface, spray ground floor protective coating, after pipe is placed 12h, then brush second layer protective coating, the most again pipe is placed 12h；Described ground floor protective coating thickness is 180-240 μm, and described second layer protective coating thickness is 110-140 μm；
4) heating: pipe is placed in zone heating in annular furnace 2, micro-oxidizing atmosphere heating and thermal insulation, burner hearth pressure-fired, and low temperature section firing rate at a slow speed is 10min/cm, high temperature quick fraction firing rate is 7min/cm；Described low temperature section at a slow speed includes preheating section 580-620 DEG C, heating I section 670-750 DEG C, heating II section 830-900 DEG C and heating III section 900-1000 DEG C, and quick bringing-up section is soaking zone 1020-1040 DEG C, has heated rear discharging opening temperature and has been 980-1060 DEG C；
5) perforation: in pipe being transplanted on high accuracy machine by intelligent heat preserving tunnel 8, centering cone mill group 3 is to obtain hollow billet to pipe perforation；During perforation, 190mm is stretched on pipe diameter drafts 36mm, top front reduction ratio 6.2%, roll spacing 244mm, top, and the most preperforative blank temperature is 960-1010 DEG C, temperature 980-1026 DEG C during perforation, hollow billet temperature 950-995 DEG C after perforation；
6) finish rolling: hollow billet is transplanted on the high accuracy multi-functional re-entrant trough profiled steel sheeting of retained mandrel 4 by the quick transfer device of body 9 and obtains hollow forging so that hollow billet is carried out secondary finish rolling；Hollow billet diameter drafts 23mm during finish rolling, subtract wall 2.0mm, enlarging rate 10.9%, wherein, hollow billet temperature 930-950 DEG C before finish rolling, temperature 948-966 DEG C during finish rolling, hollow forging temperature 920-945 DEG C after finish rolling；
7) sizing: hollow forging is transplanted on Frequency Induction Heating formula high accuracy sizing unit 5 to determine that final outside dimension obtains finished product seamless pipe by intelligent heat preserving tunnel 8；Wherein, the Frequency Induction Heating temperature of this operation is 980 DEG C, and before sizing, hollow forging temperature is 910-920 DEG C, and after sizing, finished product seamless pipe temperature is 770-830 DEG C；
8) thermal straightening: by the quick transfer device of body 9 finished product seamless pipe is transplanted in straightener 6 and carries out thermal straightening, make the flexibility≤1.0mm of finished product seamless pipe；Finished product seamless pipe temperature before aligning is 600-640 DEG C, temperature is 400-440 DEG C after aligning；
9) sawing: the two ends cutting processing to seamless pipe, reaches the requirement of finished product seamless pipe；
10) sandblasting: the surfaces externally and internally of finished product seamless pipe is carried out blasting treatment, to improve presentation quality；
11) nondestructive inspection: finished product seamless pipe is carried out ultrasonic examination by ultrasonic flaw detection equipment 7, rejects and has the crackle exceeded standard, layering, sand holes and fall the defective seamless pipe of hole defect；
12) desk checking and packaging warehouse-in: test chemical composition, physical property and the hydraulic pressure of finished product seamless pipe, measures and record appearance quality, external diameter, ovality, wall thickness, length and the straight degree of seamless pipe in blocks, packs warehouse-in afterwards.By parameters such as the reduction ratio of relevant device, enlarging rates when adjustment perforation, finish rolling and sizing operation, the seamless pipe specification that the present embodiment blanking pipe processes is: Φ 273 × 12mm, a length of 11.65m.

Claims (8)

1. the hot-working production system of titanium or titanium alloy seamless pipe, it is characterised in that include following equipment:
Centring machine, it for processing internal point to bore a hole at titanium or titanium alloy pipe two ends；
Annular furnace, it is used for heating titanium or titanium alloy pipe；
Centering cone mill group in machine in high precision, it is for obtaining hollow billet to pipe drilling/rolling, including centering Horizontal type fungi formula perforating machine in feel relieved in high accuracy machine vertical cone mill or high accuracy machine；The roll material of centering Horizontal type fungi formula perforating machine in vertical cone mill and high accuracy machine of feeling relieved in described high accuracy machine is 60CrMnMo and modifier treatment HB229-255, top material be molybdenio specialty alloys, guide plate material be Langaloy, push rod material be 1Cr5MO thick-wall seamless；In described high accuracy machine interior feel relieved vertical cone mill or high accuracy machine, centering Horizontal type fungi formula perforating machine is equipped with regulating enclasping force and the robot brain of opening degree between roll according to as-rolled condition；
The multi-functional re-entrant trough profiled steel sheeting of retained mandrel in high precision, its wall thickness reducing amount is 2.6mm, drafts is 10%, mill speed is 0.4m/s, and roll knurl depth is 0.3mm, including type I and type II；It obtains hollow forging for wall thickness expanding, equal to hollow billet secondary finish rolling, extension to improve hollow billet surfaces externally and internally quality and material structure performance；The roll material of described type I and type II is 40CrNiMo, and plug material is 42CrMo, and rolling sheets matter is Langaloy；
Frequency Induction Heating formula high accuracy sizing unit, it is for rolling as production tube by hollow forging, including three-roller type nine frame Frequency Induction Heating formula high accuracy sizing mill and combined type sizing unit, described combined type sizing unit includes three-roller type five frame Frequency Induction Heating formula high accuracy sizing mill and three-roller type seven frame Frequency Induction Heating formula high accuracy sizing mill；
Mobile device, it is for transferring pipe, hollow billet, hollow forging and finished product seamless pipe between corresponding operation；
Straightener, it reaches criterion of acceptability for the flexibility of thermal straightening production tube；
Ultrasonic flaw detection equipment, it is for production tube ultrasonic examination；
Intelligent temperature control system, it is for detecting and regulate temperature when each equipment produces.
The production system of titanium or titanium alloy seamless pipe the most according to claim 1, it is characterised in that: described mobile device includes intelligent heat preserving tunnel and the quick transfer device of body；Described intelligent temperature control system includes annular furnace point for measuring temperature, perforation unit point for measuring temperature, re-entrant trough profiled steel sheeting testing temperature point, sizing unit point for measuring temperature, straightener point for measuring temperature and maintenance tunnel point for measuring temperature；
Described intelligent heat preserving tunnel is provided with 2 groups, one of which pipe after annular furnace is heated is transplanted on centering cone mill group station in high accuracy machine, and another group is transplanted on Frequency Induction Heating formula high accuracy sizing unit for the hollow forging that multi-functional for high accuracy retained mandrel re-entrant trough profiled steel sheeting station is obtained；Described maintenance tunnel includes by sheet metal shell, the partition wall made of welding and is made liner by aluminous refractory, is provided with alumina silicate fiber felt and diatom, cob brick are made heat-insulation layer between described shell and liner；
The quick transfer device of described body is provided with 2 groups, and one of which is for being transplanted on high accuracy retained mandrel multi-functional re-entrant trough profiled steel sheeting station the hollow billet after cone mill group station rolling of feeling relieved in high accuracy machine.
The production system of titanium or titanium alloy seamless pipe the most according to claim 1, it is characterised in that:
The central diameter of described annular furnace is 24 meters, furnace width is 4.6 meters, be suitable for pipe specification Φ 90-310mm, maximum operation (service) temperature 1320 DEG C, fuel are natural gas, average fuel consumption 3000m/h；
In described high accuracy machine, the roller diameter of the vertical cone mill of centering is 700-800mm, roll footage is 700mm, roll inlet angle is 2.5 °, roll exit angle is 3 °, the a length of 320mm of roll approach cone, roll exit bores a length of 380mm, roll transition band width 5mm, roll feed angle 8-13 °, roll rolling angle 15 °, roll rotational speed is 48-106r/min, mill roll-gap maximum open is 210mm, dolly maximum translational speed 2.5m/s, punching rate 0.6-0.8m/s, roll-force is 1600kN, maximum rolling force square is 200kN m；Feel relieved in described high accuracy machine vertical cone mill equipped with 2 power be 2200KW, rotating speed be the mair motor of 550-750r/min；
In described high accuracy machine the roller diameter of centering Horizontal type fungi formula perforating machine be 1040-1200mm, a length of 1000mm, roll off angle be 12.5 °, roll feed angle be 8 °, roll surface approach cone angle be 2.5 °, roll surface outlet cone angle be 3 °, roll maximum opening degree be 490mm, roll rotational speed 45-100r/min, single roller maximum rolling force square be 650kN, milling train maximum rolling force be 5000kN；In described high accuracy machine centering Horizontal type fungi formula perforating machine equipped with 4 power be 1500kW, overload factor be the mair motor of 2.4；
The roller diameter of described type I is 700-800mm, roll footage is 700mm, roll send roll angle be 8 °, roll roll off angle be 5 °, roll rotational speed 105-157r/min, maximum rolling force square be 230kN m, maximum rolling force be 2870kN；
The roller diameter of described type II is 1100-1200mm, roll footage is 1000mm, roll rotational speed 63-130r/min, feed angle are 8 °；Described type II equipped with 4 power be 1250kW, rotating speed be 320-600r/min, speed reducing ratio be the mair motor of 4.538；
The entrance hollow forging speed of described three-roller type nine frame Frequency Induction Heating formula high accuracy sizing mill is 0.4-0.7m/s, roller diameter is 480mm, roll width is 180mm, single chassis maximum reducing rate is 3.3%, maximum rolling force is 130.5kN, roll torque is 4.7kN m；
The entrance velocity of described three-roller type five frame Frequency Induction Heating formula high accuracy sizing mill is 0.3-0.9m/s, roller diameter is 670mm, roll width is 390mm, frame spacing is 630mm, single chassis maximum reducing rate is 3.3%, maximum rolling force is 500kN；Described three-roller type five frame Frequency Induction Heating formula high accuracy sizing mill equipped with 5 power be 250kW, rotating speed be the mair motor of 500-1000r/min；
The entrance velocity of described three-roller type seven frame Frequency Induction Heating formula high accuracy sizing mill is 0.4-0.7m/s, and roll nominal diameter is 530mm, roll width is 250mm or 310mm, single chassis maximum reducing rate is 3.3%, unit maximum reducing rate is 10%；Described three-roller type seven frame Frequency Induction Heating formula high accuracy sizing mill equipped with 9 power be 147kW, overload factor be the mair motor of 1.6.
4. the titanium or titanium alloy seamless pipe that the production system utilizing titanium or titanium alloy seamless pipe as claimed in claim 1 prepares, it is characterized in that: include the seamless pipe that the trade mark is TA1, TA2, TA3, TA4, TA5, TA6, TA7, TA8, TA8-1, TA9, TA9-1, TA10, TA13, TA15, TA18, TC1, TC2, TC3, TC4, TC10, a diameter of 73-325mm of described seamless pipe, wall thickness is 5.5-25.0mm, and length is 13500mm to the maximum.
5. the hot-working production method of a titanium or titanium alloy seamless pipe as claimed in claim 4, it is characterised in that include following operation:
1) blanking: titanium or titanium alloy blank is cut off by the length of production requirement, and the blank after cutting off is worked into corresponding outside dimension by production requirement, ensureing surface roughness Ra≤3.2 μm after its processing, blanking completes to obtain qualified titanium alloy pipe simultaneously；
2) internal point: use centring machine to process internal point in the both ends of the surface of pipe；
3) brushing protective coating: at the external coating protective coating of pipe；
4) heating: pipe is placed in zone heating in annular furnace, and low temperature section firing rate at a slow speed is 10min/cm, high temperature quick fraction firing rate is 7min/cm；Micro-oxidizing atmosphere heating and thermal insulation；Burner hearth pressure-fired；Described low temperature section at a slow speed includes preheating section 500 DEG C-650 DEG C, heating I section 650 DEG C-800 DEG C, heating II section 800-1000 DEG C and heating III section 1000 DEG C-1080 DEG C；Described high temperature quick fraction includes soaking zone, wherein, the trade mark is that the heating samming of TA1, TA2, TA3, TA4, TA5, TA6 and TA7 pipe is 960-985 DEG C, the trade mark is that the heating samming of TA8, TA8-1, TA9, TA9-1, TA10, TA13, TA15, TA18 pipe is 1000-1020 DEG C, and the trade mark is that TC1, TC2, TC3, TC4, TC10 heating of pipe blank samming is 1000-1070 DEG C；Drop temperature 950 DEG C-1120 DEG C；
5) perforation: in pipe being transplanted on high accuracy machine by intelligent heat preserving tunnel, centering cone mill group is to obtain hollow billet to pipe perforation；Wherein, preperforative blank temperature is 920-1050 DEG C, temperature 960-1120 DEG C in perforation procedure, hollow billet temperature 930-1080 DEG C after perforation；
6) finish rolling: hollow billet is transplanted on the high accuracy multi-functional re-entrant trough profiled steel sheeting of retained mandrel by the quick transfer device of body and obtains hollow forging so that hollow billet is carried out secondary finish rolling；Wherein, hollow billet temperature 880-1050 DEG C before finish rolling, temperature 930-1010 DEG C in tube rolling journey, hollow forging temperature 830-980 DEG C after finish rolling；
7) sizing: hollow forging is transplanted on Frequency Induction Heating formula high accuracy sizing unit to determine that final outside dimension obtains finished product seamless pipe by intelligent heat preserving tunnel；Maximum heating temperature in this operation is 1100 DEG C, and before sizing, hollow forging temperature is 850-980 DEG C, and after sizing, finished product seamless pipe temperature is 760-840 DEG C, closes cooling water in Sizing Process；
Wherein, the Frequency Induction Heating maximum heating temperature in this operation is 1100 DEG C, and before sizing, hollow forging temperature is 860-980 DEG C, and after sizing, finished product seamless pipe temperature is 760-840 DEG C；
8) thermal straightening: by body quick transfer device finished product seamless pipe is transplanted in straightener and carries out thermal straightening, and repeatedly aligned by circulation roller-way, make the flexibility≤1.0mm of finished product seamless pipe and total length flexibility be not more than the 0.10% of titanium pipe total length；Finished product seamless pipe temperature before aligning is 550-650 DEG C, temperature is 350-440 DEG C after aligning；
9) sawing: the two ends cutting processing to seamless pipe, reaches the requirement of finished product seamless pipe；
10) sandblasting: the surfaces externally and internally of finished product seamless pipe is carried out blasting treatment, to improve presentation quality；
11) nondestructive inspection: finished product seamless pipe is carried out ultrasonic examination by ultrasonic flaw detection equipment, rejects and has the crackle exceeded standard, layering, sand holes and fall the defective seamless pipe of hole defect；
12) desk checking and packaging warehouse-in: test chemical composition, physical property and the hydraulic pressure of finished product seamless pipe, measures and record appearance quality, external diameter, ovality, wall thickness, length and the straight degree of seamless pipe in blocks, packs warehouse-in afterwards.
Hot-working production method the most according to claim 5, it is characterized in that, in step 3), the method of described brushing protective coating is: after ethanol and Electric brush of bristles cleaning pipe surface, spraying ground floor protective coating, after pipe is placed 12h, then brush second layer protective coating, the most again pipe is placed 12h；Described ground floor protective coating thickness is 160-280 μm, and described second layer protective coating thickness is 90-140 μm.
7. want the hot-working production method described in 5 according to right, it is characterized in that, in step 1), the outside dimension of described pipe includes Φ 90mm, Φ 160mm, Φ 180mm, Φ 210mm, Φ 230mm, Φ 250mm, Φ 280mm and Φ 310mm, its diameter tolerance is respectively Φ 90 ± 1.6mm, Φ 160 ± 1.6mm, Φ 180 ± 2.0mm, Φ 210 ± 1.8mm, Φ 230 ± 1.8mm, Φ 250 ± 2.0mm, Φ 280 ± 2.0mm and Φ 310 ± 2.0mm, ovality diameter tolerance ± 1mm, length tolerance 0-+50mm, end face is cut gradient and is not more than 5mm, flexibility every meter is less than 5mm.
Hot-working production method the most according to claim 7, it is characterized in that, step 2) in, the size of described internal point determines according to pipe outside dimension: outside dimension is a diameter of 20mm of internal point of Φ 90mm, Φ 160mm and Φ 180mm, the degree of depth is 20mm, chamfering is R5, outside dimension is a diameter of 30mm of internal point of Φ 210mm and Φ 230mm, the degree of depth is 30mm, chamfering is R5, and outside dimension is a diameter of 35mm of internal point of Φ 250mm, Φ 280mm and Φ 310mm, the degree of depth is 35mm, chamfering is R5.
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CN111167862A (en) * 2020-01-05 2020-05-19 天津大学 Manufacturing method of large-diameter titanium and titanium alloy seamless pipe
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CN110340148A (en) * 2019-07-25 2019-10-18 西北工业大学 A kind of roll piercing method of ocean diphasic titanium alloy seamless tube blank
CN111167862A (en) * 2020-01-05 2020-05-19 天津大学 Manufacturing method of large-diameter titanium and titanium alloy seamless pipe
CN112620388A (en) * 2020-12-01 2021-04-09 中色科技股份有限公司 Online continuous rolling annealing stretching production line for copper alloy pipe
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