CN115971263B - Online gradient temperature control equipment for seamless metal composite pipe and rolling and heat treatment method thereof - Google Patents
Online gradient temperature control equipment for seamless metal composite pipe and rolling and heat treatment method thereof Download PDFInfo
- Publication number
- CN115971263B CN115971263B CN202310268789.8A CN202310268789A CN115971263B CN 115971263 B CN115971263 B CN 115971263B CN 202310268789 A CN202310268789 A CN 202310268789A CN 115971263 B CN115971263 B CN 115971263B
- Authority
- CN
- China
- Prior art keywords
- temperature control
- pipe
- rolling
- gradient
- seamless metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
The invention belongs to the technical field of seamless metal composite tube forming, and particularly relates to an online gradient temperature control device for a seamless metal composite tube and a rolling and heat treatment method thereof, wherein the device comprises a gradient temperature control assembly and a first thermometer which are sequentially arranged along a rolling axis; the gradient temperature control assembly comprises N groups of basic temperature control units which are arranged side by side, wherein the basic temperature control units consist of electromagnetic induction heating modules and annular water mist cooling modules, and the annular water mist cooling modules are spirally and uniformly distributed with a plurality of water mist cooling spray heads along the circumferential direction; according to the invention, the outer wall temperature T1 of the outer layer pipe is actively controlled to be lower than the inner wall temperature T2 of the inner layer pipe, so that the outer layer pipe has good strength in the rolling compounding process, the phenomenon of tearing of the outer layer pipe can be avoided, and the deformation coordination in the rolling compounding process of the metal composite pipe can be improved due to the higher temperature of the inner layer pipe.
Description
Technical Field
The invention belongs to the technical field of seamless metal composite pipe forming, and particularly relates to online gradient temperature control equipment for a seamless metal composite pipe and a rolling and heat treatment method thereof.
Background
The seamless metal composite pipe belongs to structural and functional materials with comprehensive performances such as rigidity, strength, corrosion resistance, wear resistance and the like, the matrix and the coating are tightly combined through a special forming technology, and the carbon steel/stainless steel composite pipe with the largest demand in China is taken as an example.
At present, the preparation process of the seamless metal composite pipe mainly comprises a hot extrusion method, an explosion welding method, a hydraulic expansion method, a rolling composite method and the like, however, for the efficient preparation of the seamless metal composite pipe with different size specifications or component collocations, the conventional forming process still has a plurality of problems, for example, when the whole wall thickness of the seamless metal composite pipe is thinner, or when the outer layer pipe is required to be thinner and the inner layer pipe is thicker according to the external corrosion resistance requirement, the stable forming of the seamless metal composite pipe faces a great challenge. The hot extrusion method can be generally used only for forming a low melting point nonferrous metal composite tube, the explosion welding method and the hydraulic expansion joint method can be used for forming a seamless metal composite tube such as stainless steel/carbon steel, titanium/carbon steel and the like, but the explosion welding method has remarkable noise and environmental pollution, the hydraulic expansion joint method can only form mechanical combination mainly comprising interference fit, and the two methods generally transmit load from inside to outside, but the load cannot be effectively transmitted to an interface when an outer tube is thin and an inner tube is thick.
The rolling compounding method of the seamless metal composite pipe has remarkable high efficiency, is expected to realize metallurgical bonding of a composite interface, and can finally realize metallurgical bonding of the composite interface only after the rolling compounding process is subjected to a round-triangle-round deformation process. However, in the rolling and compounding process of the seamless metal composite pipe, because the outer layer pipe and the inner layer pipe are heated together to the same temperature, when the whole wall thickness is thinner or the wall thickness of the outer layer pipe is thinner and the wall thickness of the inner layer pipe is thicker, the tearing phenomenon of the outer pipe is quite remarkable, stable forming cannot be realized, and when the whole rolling temperature is reduced, the metallurgical bonding of a composite interface cannot be realized. Therefore, how to realize high-strength metallurgical bonding of the composite interface on the basis of avoiding the tearing defect of the outer-layer pipe becomes a key technical bottleneck to be broken through urgently at home and abroad.
Disclosure of Invention
The invention provides an online gradient temperature control device for a seamless metal composite pipe and a rolling and heat treatment method thereof.
The invention adopts the following technical scheme to achieve the aim:
an on-line gradient temperature control device for a seamless metal composite pipe comprises a gradient temperature control assembly and a first thermometer which are sequentially arranged along a rolling axis;
the gradient temperature control assembly comprises N groups of basic temperature control units which are arranged side by side, the distance between every two adjacent basic temperature control units is L1, the basic temperature control units are composed of an electromagnetic induction heating module and an annular water mist cooling module, the distance between the electromagnetic induction heating module and the annular water mist cooling module is L2, the annular water mist cooling module is spirally and uniformly provided with a plurality of water mist cooling spray heads along the circumferential direction, the orientation of the water mist cooling spray heads is opposite to the movement direction of the seamless metal composite pipe along the rolling axis, and the spiral direction of the water mist cooling spray heads is opposite to the rotation direction of the seamless metal composite pipe around the rolling axis;
the first thermometer is arranged at the rear side of the gradient temperature control assembly and is used for feeding back and adjusting the opening and closing states of the electromagnetic induction heating module and the annular water mist cooling module in the gradient temperature control assembly.
Further, the rolling temperature control assembly and a second thermometer are also included;
the rolling temperature control assembly comprises a group of annular gas cooling modules, the annular gas cooling modules are arranged at the inlet side of rolling equipment, a plurality of gas cooling spray heads are spirally and uniformly distributed along the circumferential direction of the annular gas cooling modules, the direction of the gas cooling spray heads is the same as the moving direction of the seamless metal composite pipe along the rolling axis, and the spiral direction of the gas cooling spray heads is the same as the rotating direction of the seamless metal composite pipe around the rolling axis;
and the second thermometer is arranged at the outlet side of the rolling equipment and is used for feeding back and adjusting the cooling gas flow of the annular gas cooling module.
A rolling compounding method of a seamless metal composite pipe comprises the following steps:
s1, prefabricating a sleeve assembly: cleaning and drying the surfaces of the outer layer pipe and the inner layer pipe, sleeving and assembling according to the sequence that the outer layer pipe is outside and the inner layer pipe is inside, sealing and welding the two ends, and vacuumizing to complete the assembling work of the prefabricated sleeved pipe blank;
s2, online gradient heating: penetrating a core rod into the middle of a prefabricated sleeved pipe blank, sending the core rod into a gradient temperature control assembly by a core rod trolley for heating, forming a temperature gradient in the wall thickness direction of an outer pipe and an inner pipe, measuring the temperature of the outer surface of the prefabricated sleeved pipe blank by a first thermometer, feeding back the opening and closing states of an electromagnetic induction heating module and an annular water mist cooling module in a fine-tuning basic temperature control unit, and heating the outer surface of the outer pipe and the inner surface of the inner pipe to target temperatures T1 and T2 respectively to form an active control temperature gradient delta T=T1-T2;
s3, temperature control rolling compounding: the method comprises the steps of adjusting a roller and a baffle of a rolling device, setting a target hole type size, enabling a prefabricated sleeved pipe blank with a temperature gradient delta T in the wall thickness direction to enter a roller gap formed by a core rod, the roller and the baffle in a surrounding mode for rolling and compounding, measuring the temperature of the outer surface of the rolled and compounded seamless metal composite pipe by a second thermometer positioned at the outlet side of the rolling device, feeding back and adjusting the cooling gas flow of an annular gas cooling module at the inlet side of the rolling device, carrying out online cooling on the rolling and compounding process, counteracting the phenomenon of temperature rise and strength reduction of an outer pipe caused by severe plastic deformation, guaranteeing the temperature of the outer pipe to be lower and the strength of a base body to be higher, avoiding tearing phenomenon, inhibiting a compound interface from forming intermetallic compounds at the over-high temperature, realizing high-strength metallurgical bonding of the compound interface, guaranteeing the temperature of an inner pipe to be higher and strength to be lower, and promoting coordinated deformation of component metals;
s4, fixed-length cutting and collecting: the prefabricated sleeved tube blank is rolled and compounded, the diameter is reduced, the wall thickness is reduced, the metallurgical bonding of a compound interface is realized, the final rolling state seamless metal compound tube is obtained, the head part and the tail part are removed, then the fixed-length cutting is carried out, the comprehensive performance of the target component metal and the compound interface is obtained after the gradient temperature control heat treatment, the final rolling state seamless metal compound tube is obtained, and the final rolling state seamless metal compound tube is bundled, packaged and put in storage.
A heat treatment method for a seamless metal composite pipe comprises the steps of conveying the seamless metal composite pipe into a gradient temperature control assembly by using a conveying roller way to heat, forming a temperature gradient in the wall thickness direction of an outer layer pipe and an inner layer pipe, measuring the temperature of the outer surface of the seamless metal composite pipe by a first thermometer, feeding back the opening and closing states of an electromagnetic induction heating module and an annular water mist cooling module in a fine adjustment basic temperature control unit, respectively heating the outer surface of the outer layer pipe and the inner surface of the inner layer pipe to respective heat treatment target temperatures t1 and t2 to form a temperature gradient delta t=t1-t 2, and obtaining the comprehensive performance of target component metal and a composite interface after gradient temperature control heat treatment.
Compared with the prior art, the invention has the following advantages:
the gradient temperature control assembly comprises N groups of basic temperature control units which are arranged side by side, wherein the basic temperature control units consist of an electromagnetic induction heating module and an annular water mist cooling module, the outer wall temperature T1 of an outer layer pipe is actively controlled to be lower than the inner wall temperature T2 of an inner layer pipe through alternately heating and cooling, a first thermometer is matched to generate controllable temperature gradient delta T=T1-T2 in the wall thickness direction of a seamless metal composite pipe, the outer layer pipe is low in temperature in the rolling composite process so as to have good strength, the phenomenon of tearing of the outer layer pipe can be avoided, the deformation coordination of the inner layer pipe in the rolling composite process of the metal composite pipe can be improved, the composite interface temperature is between the electromagnetic induction heating module and the annular water mist cooling module, the intermetallic compound formed at the composite interface at the too high temperature can be restrained, the metallurgical bonding of the composite interface can be promoted, and the rolling composite process window can be remarkably enlarged;
according to the annular water mist cooling module, the plurality of water mist cooling spray heads are spirally and uniformly distributed along the circumferential direction, the direction of the water mist cooling spray heads is opposite to the moving direction of the seamless metal composite pipe along the rolling axis, the spiral direction of the water mist cooling spray heads is opposite to the rotating direction of the seamless metal composite pipe around the rolling axis, the seamless metal composite pipe which spirally advances along the rolling axis can be forcedly cooled, the cooling strength and the cooling uniformity are remarkably improved, the space inclination angle and the flow rate of the water mist cooling spray heads are adjustable, and the requirements of matching different dimension specifications and component metals can be met;
the temperature-control rolling assembly comprises a group of annular gas cooling modules arranged at the inlet side of rolling equipment, wherein a plurality of gas cooling spray heads are spirally and uniformly distributed along the circumferential direction, the direction of each gas cooling spray head is the same as the moving direction of a seamless metal composite pipe along a rolling axis, the spiral direction of each gas cooling spray head is the same as the rotating direction of the seamless metal composite pipe around the rolling axis, the temperature-control rolling assembly can be used for controllably and forcedly cooling the rolling composite process by matching with a second thermometer, the temperature rise phenomenon of an outer layer pipe caused by severe plastic deformation is counteracted, the tearing phenomenon of the outer layer pipe is avoided again, intermetallic compounds are inhibited from being formed at an excessive temperature, the high-strength metallurgical bonding of a composite interface is promoted and the space inclination angle and the flow of each gas cooling spray head are adjustable, so that the matching requirements of different sizes and constituent metals can be met;
the invention can meet the requirements of the seamless metal composite pipe temperature control rolling compounding when the seamless metal composite pipe is matched with component metals by adjusting the arrangement and the opening and the closing of the on-line gradient temperature control equipment, can also be used for meeting different heat treatment process intervals required by different component metals by actively controlling the temperature gradient between the outer layer pipe and the inner layer pipe through gradient temperature control heat treatment, and can simultaneously carry out heat treatment regulation and control on the structure performance of a composite interface.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of a basic temperature control unit according to the present invention;
FIG. 3 is a schematic view of a rolling temperature control assembly of the present invention;
FIG. 4 is a graph showing the true stress and true strain of 45# high-quality carbon structural steel at a high temperature;
FIG. 5 is a graph showing the true stress and true strain of 316L stainless steel at high temperature;
FIG. 6 is a schematic diagram of the deformation process when the deformation resistance of the outer tube is smaller than that of the inner tube;
FIG. 7 is a schematic illustration of the deformation process when the deformation resistance of the outer tubing is greater than that of the inner tubing;
FIG. 8 is a schematic view of a seamless metal composite tube exhibiting an outer tube tearing phenomenon;
FIG. 9 is a schematic diagram showing the temperature change curve of the online gradient temperature-controlled heating process according to the present invention;
FIG. 10 is a schematic view of a seamless metal composite tube with good interface bonding;
in the figure, a gradient temperature control assembly-1, a first temperature measuring meter-2, a rolling temperature control assembly-3, a second temperature measuring meter-4, a rolling device-5, an electromagnetic induction heating module-101, an annular water mist cooling module-102 and an annular gas cooling module-301.
Detailed Description
In order to further illustrate the technical scheme of the invention, the invention is further illustrated by the following examples.
Example 1
As shown in fig. 1 to 3, the online gradient temperature control equipment for the seamless metal composite pipe comprises a gradient temperature control assembly 1, a first thermometer 2, a rolling temperature control assembly 3 and a second thermometer 4 which are sequentially arranged along a rolling axis;
the gradient temperature control assembly 1 comprises N groups of basic temperature control units which are arranged side by side, the distance between every two adjacent basic temperature control units is L1, each basic temperature control unit consists of an electromagnetic induction heating module 101 and an annular water mist cooling module 102, the distance between each electromagnetic induction heating module 101 and each annular water mist cooling module 102 is L2, a plurality of water mist cooling spray heads are spirally distributed on each annular water mist cooling module 102 along the circumferential direction, the direction of each water mist cooling spray head is opposite to the moving direction of a seamless metal composite pipe along a rolling axis, and the spiral direction of each water mist cooling spray head is opposite to the rotating direction of the seamless metal composite pipe around the rolling axis;
the rolling temperature control assembly 3 comprises a group of annular gas cooling modules 301, wherein the annular gas cooling modules 301 are arranged at the inlet side of the rolling equipment 5, a plurality of gas cooling spray heads are spirally and uniformly distributed on the annular gas cooling modules 301 along the circumferential direction, the orientation of each gas cooling spray head is the same as the movement direction of the seamless metal composite pipe along the rolling axis, and the spiral direction of each gas cooling spray head is the same as the rotation direction of the seamless metal composite pipe around the rolling axis;
the first thermometer 2 is arranged at the rear side of the gradient temperature control assembly 1 and is used for feeding back and adjusting the opening and closing states of the electromagnetic induction heating module 101 and the annular water mist cooling module 102 in the gradient temperature control assembly 1; the second thermometer 4 is disposed at the outlet side of the rolling device 5, and is used for feeding back and adjusting the cooling gas flow of the annular gas cooling module 301.
The space inclination angle and the flow rate of the water mist cooling spray heads in the annular water mist cooling module 102 are adjustable; the space inclination angle and the flow rate of the gas cooling spray head in the annular gas cooling module 301 are adjustable.
The whole wall thickness is thinner: rolling compounding method for carbon steel/stainless steel seamless metal composite pipe
The outer layer pipe is a 45# high-quality carbon structural steel pipe, the outer diameter is 70mm, the wall thickness is 4mm, the inner layer pipe is a 316L stainless steel pipe, the outer diameter is 62mm, the wall thickness is 2mm, and the number of basic temperature control units in the gradient temperature control assembly 1 is 10 groups;
s1, prefabricating a sleeve assembly: prefabricating the suit assembly: cleaning and drying the surfaces of the outer layer pipe and the inner layer pipe, sleeving and assembling according to the sequence that the outer layer pipe is outside and the inner layer pipe is inside, sealing and welding the two ends, and vacuumizing to complete the assembling work of the prefabricated sleeved pipe blank;
s2, online gradient heating: penetrating a core rod into the middle of a prefabricated sleeved pipe blank, conveying the core rod into a gradient temperature control assembly 1 by a core rod trolley for heating, forming a temperature gradient in the wall thickness direction of an outer pipe and an inner pipe, measuring the temperature of the outer surface of the prefabricated sleeved pipe blank by a first thermometer 2, feeding back the opening and closing states of an electromagnetic induction heating module 101 and an annular water mist cooling module 102 in a fine adjustment basic temperature control unit, and heating the outer surface of the outer pipe and the inner surface of the inner pipe to target temperatures T1=950 ℃ and T2=1150 ℃ respectively to form an active control temperature gradient delta T=950-1150= -200 ℃;
s3, temperature control rolling compounding: the method comprises the steps of adjusting a roller and a baffle of a rolling device 5, setting a target hole type size, enabling a prefabricated sleeved pipe blank with a temperature gradient delta T in the wall thickness direction to enter a roller gap formed by a core rod, the roller and the baffle in a surrounding mode for rolling and compounding, measuring the temperature of the outer surface of the rolled and compounded seamless metal composite pipe by a second thermometer 4 positioned at the outlet side of the rolling device 5, feeding back and adjusting the cooling gas flow of an annular gas cooling module 301 at the inlet side of the rolling device 5, performing online cooling on the rolling and compounding process, counteracting the phenomenon that the temperature of an outer pipe is increased and the strength is reduced due to severe plastic deformation, guaranteeing that the temperature of the outer pipe is lower and the strength of a matrix is higher, avoiding tearing phenomenon, inhibiting a compound interface from forming intermetallic compounds at the excessive temperature, realizing high-strength metallurgical bonding of the compound interface, guaranteeing that the temperature of an inner pipe is higher and the strength is lower, and promoting coordinated deformation of component metals;
s4, fixed-length cutting and collecting: the prefabricated sleeved tube blank is rolled and compounded, the diameter is reduced, the wall thickness is thinned, the metallurgical bonding of a compound interface is realized, the final rolled stainless steel/carbon steel seamless metal compound tube is obtained, the head and tail are removed, then the fixed-length cutting is carried out, the comprehensive performance of the target component metal and the compound interface is obtained after the gradient temperature control heat treatment, the final rolled stainless steel/carbon steel seamless metal compound tube is obtained, and the final rolled stainless steel/carbon steel seamless metal compound tube is bundled, packaged and put in storage.
Fig. 4 is a true stress and true strain curve, i.e., deformation resistance change curve, of the 45# high-quality carbon structural steel at a high temperature, and fig. 5 is a true stress and true strain curve, i.e., deformation resistance change curve, of the 316L stainless steel at a high temperature, and it can be seen from the graph that the deformation resistance of the 45# high-quality carbon structural steel at the same temperature is significantly different, for example, at 1150 ℃, the true stress of the 45# high-quality carbon structural steel is about 10MPa, and the true stress of the 316L stainless steel is about 25MPa. The rolling deformation process of the seamless metal composite pipe can be analyzed through numerical simulation, and numerical simulation results show that when the deformation resistance of the outer layer pipe is smaller than that of the inner layer pipe, obvious gaps appear at the composite interface in the rolling composite process due to deformation incompatibility, as shown in fig. 6, the bonding performance of the composite interface is obviously reduced, and the method is also an important cause for causing the tearing phenomenon of the outer pipe. When the deformation resistance of the outer layer pipe is larger than that of the inner layer pipe, no obvious gap exists at the composite interface in the rolling and compositing process, as shown in fig. 7, the two layers realize coordinated deformation, so that the bonding strength of the composite interface can be improved, meanwhile, the inner layer pipe provides contact support for the outer layer pipe, and the tearing phenomenon of the outer layer pipe can be remarkably avoided.
The temperature of the component metal determines the deformation resistance, the deformation resistance is larger as the temperature is lower, the tearing phenomenon is less likely to occur, the deformation resistance is smaller as the temperature is higher, the tearing is more likely to occur, and the excessive temperature can cause a large amount of intermetallic compounds to be generated at the composite interface so as to weaken the bonding strength of the composite interface. However, as can be seen from fig. 4 and 5, the true stress of the outer layer tube is smaller than that of the inner layer tube at the same temperature, and the conventional rolling composite technology cannot avoid the tearing phenomenon of the outer layer tube and realize the metallurgical bonding of the composite interface. The schematic diagram of the seamless metal composite tube with the outer tube tearing phenomenon is shown in fig. 9, and the outer tube tearing phenomenon immediately occurs after the seamless metal composite tube is contacted with a roller, so that the seamless metal composite tube cannot be formed due to the interruption of the rolling process, even damage is caused to the roller or a guide plate, and the seamless metal composite tube needs to be immediately stopped for cleaning by disassembling equipment.
The schematic diagram of the online gradient temperature-controlled heating temperature change curve in the technical scheme is shown in fig. 9, and the outer surface of the outer layer pipe can be heated to the temperature T1 and the inner surface of the inner layer pipe can be heated to the temperature T2 by alternately heating and cooling for a plurality of times, so that an active control temperature gradient delta T=T1-T2 is formed between the two. As can be seen from the combination of FIG. 4 and FIG. 5, the deformation resistance of the outer layer pipe 45# high-quality carbon structural steel is about 40MPa at 950 ℃ and the deformation resistance of the inner layer pipe 316L stainless steel is about 20MPa at 1150 ℃, and the outer layer pipe can avoid tearing due to the fact that the deformation resistance of the outer layer pipe is larger than that of the inner layer pipe by actively controlling the temperature gradient, the inner layer pipe can be deformed in a coordinated manner with the outer layer pipe, and a large amount of intermetallic compounds can be prevented from being generated at a composite interface, so that high-strength metallurgical bonding is formed. For example, fig. 10 is a schematic diagram of a seamless metal composite tube with a good interface bonding state, no obvious intermetallic compound exists at the composite interface, the tensile-shear strength of the interface reaches 380MPa, and the fracture position is located at the carbon steel side, so that the composite interface realizes high-strength metallurgical bonding.
Heat treatment method for stainless steel/carbon steel seamless metal composite pipe
And (3) conveying the final-rolled 45# carbon steel/316L stainless steel seamless metal composite pipe into a gradient temperature control assembly 1 by using a conveying roller way to heat, forming a temperature gradient in the wall thickness direction of the outer layer pipe and the inner layer pipe, measuring the temperature of the outer surface of the seamless metal composite pipe by a first thermometer 2, feeding back the opening and closing states of an electromagnetic induction heating module 101 and an annular water mist cooling module 102 in a fine adjustment basic temperature control unit, heating the outer surface of the outer layer pipe and the inner surface of the inner layer pipe to respective heat treatment target temperatures t1=840 ℃ and t2=1050 ℃ respectively, and forming a temperature gradient delta t=t1-t2=840-1050= -210 ℃, and obtaining the comprehensive performance of the target component metal and the composite interface after gradient temperature control heat treatment.
Example 2: rolling compounding method for stainless steel/carbon steel seamless metal composite pipe
The outer layer pipe is a 316L stainless steel pipe, the 45# high-quality carbon structural steel pipe has an outer diameter of 70mm and a wall thickness of 2mm, and the inner layer pipe is a 45# high-quality carbon structural steel pipe, has an outer diameter of 66mm and a wall thickness of 6mm. The number of basic temperature control units in the gradient temperature control assembly 1 is 10 groups.
S1, prefabricating a sleeve assembly: prefabricating the suit assembly: cleaning and drying the surfaces of the outer layer pipe and the inner layer pipe, sleeving and assembling according to the sequence that the outer layer pipe is outside and the inner layer pipe is inside, sealing and welding the two ends, and vacuumizing to complete the assembling work of the prefabricated sleeved pipe blank;
s2, online gradient heating: penetrating a core rod into the middle of a prefabricated sleeved pipe blank, conveying the core rod into a gradient temperature control assembly 1 by a core rod trolley for heating, forming a temperature gradient in the wall thickness direction of an outer pipe and an inner pipe, measuring the temperature of the outer surface of the prefabricated sleeved pipe blank by a first thermometer 2, feeding back the opening and closing states of an electromagnetic induction heating module 101 and an annular water mist cooling module 102 in a fine adjustment basic temperature control unit, and heating the outer surface of the outer pipe and the inner surface of the inner pipe to target temperatures T1=1000 ℃ and T2=1150 ℃ respectively to form an active control temperature gradient delta T=1000-1150= -150 ℃;
s3, temperature control rolling compounding: the method comprises the steps of adjusting a roller and a baffle of a rolling device 5, setting a target hole type size, enabling a prefabricated sleeved pipe blank with a temperature gradient delta T in the wall thickness direction to enter a roller gap formed by a core rod, the roller and the baffle in a surrounding mode for rolling and compounding, measuring the temperature of the outer surface of the rolled and compounded seamless metal composite pipe by a second thermometer 4 positioned at the outlet side of the rolling device 5, feeding back and adjusting the cooling gas flow of an annular gas cooling module 301 at the inlet side of the rolling device 5, performing online cooling on the rolling and compounding process, counteracting the phenomenon that the temperature of an outer pipe is increased and the strength is reduced due to severe plastic deformation, guaranteeing that the temperature of the outer pipe is lower and the strength of a matrix is higher, avoiding tearing phenomenon, inhibiting a compound interface from forming intermetallic compounds at the excessive temperature, realizing high-strength metallurgical bonding of the compound interface, guaranteeing that the temperature of an inner pipe is higher and the strength is lower, and promoting coordinated deformation of component metals;
s4, fixed-length cutting and collecting: the prefabricated sleeved tube blank is rolled and compounded, the diameter is reduced, the wall thickness is thinned, the metallurgical bonding of a compound interface is realized, the final rolled carbon steel/stainless steel seamless metal compound tube is obtained, the head and tail are removed, then the fixed-length cutting is carried out, the comprehensive performance of the target component metal and the compound interface is obtained after the gradient temperature control heat treatment, the finished carbon steel/stainless steel seamless metal compound tube is obtained, and the final rolled carbon steel/stainless steel seamless metal compound tube is bundled, packaged and put in storage.
Heat treatment method for carbon steel/stainless steel seamless metal composite pipe
And (3) conveying the final-rolled carbon steel/stainless steel seamless metal composite pipe into a gradient temperature control assembly 1 by using a conveying roller way to heat, forming a temperature gradient in the wall thickness direction of the outer layer pipe and the inner layer pipe, measuring the temperature of the outer surface of the seamless metal composite pipe by a first thermometer 2, feeding back the opening and closing states of an electromagnetic induction heating module 101 and an annular water mist cooling module 102 in a fine adjustment basic temperature control unit, respectively heating the outer surface of the outer layer pipe and the inner surface of the inner layer pipe to respective heat treatment target temperatures t1=550 ℃ and t2=750 ℃, forming a temperature gradient delta t=t1-t2=550-750= -200 ℃, and obtaining the comprehensive performance of the target component metal and the composite interface after gradient temperature control heat treatment.
While the principal features and advantages of the present invention have been shown and described, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (4)
1. An on-line gradient temperature control device for a seamless metal composite pipe is characterized in that: comprises a gradient temperature control assembly (1) and a first thermometer (2) which are sequentially arranged along a rolling axis;
the gradient temperature control assembly (1) comprises N groups of basic temperature control units which are arranged side by side, the distance between every two adjacent basic temperature control units is L1, each basic temperature control unit consists of an electromagnetic induction heating module (101) and an annular water mist cooling module (102), the distance between each electromagnetic induction heating module (101) and each annular water mist cooling module (102) is L2, a plurality of water mist cooling spray heads are spirally distributed on each annular water mist cooling module (102) along the circumferential direction, the direction of each water mist cooling spray head is opposite to the moving direction of a seamless metal composite pipe along a rolling axis, and the spiral direction of each water mist cooling spray head is opposite to the rotating direction of the seamless metal composite pipe around the rolling axis;
the first temperature detector (2) is arranged at the rear side of the gradient temperature control assembly (1) and is used for feeding back and adjusting the opening and closing states of the electromagnetic induction heating module (101) and the annular water mist cooling module (102) in the gradient temperature control assembly (1).
2. The on-line gradient temperature control device for a seamless metal composite tube according to claim 1, wherein: the rolling temperature control device also comprises a rolling temperature control assembly (3) and a second thermometer (4);
the rolling temperature control assembly (3) comprises a group of annular gas cooling modules (301), wherein the annular gas cooling modules (301) are arranged at the inlet side of the rolling equipment (5), a plurality of gas cooling spray heads are spirally and uniformly distributed in the circumferential direction of the annular gas cooling modules (301), the orientation of the gas cooling spray heads is the same as the movement direction of the seamless metal composite pipe along the rolling axis, and the spiral direction of the gas cooling spray heads is the same as the rotation direction of the seamless metal composite pipe around the rolling axis;
and the second temperature detector (4) is arranged at the outlet side of the rolling equipment (5) and is used for feeding back and adjusting the cooling gas flow of the annular gas cooling module (301).
3. A seamless metal composite tube rolling compounding method using the on-line gradient temperature control device of claim 2, characterized in that: the method comprises the following steps:
s1, prefabricating a sleeve assembly: cleaning and drying the surfaces of the outer layer pipe and the inner layer pipe, sleeving and assembling according to the sequence that the outer layer pipe is outside and the inner layer pipe is inside, sealing and welding the two ends, and vacuumizing to complete the assembling work of the prefabricated sleeved pipe blank;
s2, online gradient heating: penetrating a core rod into the middle of a prefabricated sleeved pipe blank, conveying the core rod into a gradient temperature control assembly (1) by a core rod trolley for heating, forming a temperature gradient in the wall thickness direction of an outer pipe and an inner pipe, measuring the temperature of the outer surface of the prefabricated sleeved pipe blank by a first thermometer (2), feeding back the opening and closing states of an electromagnetic induction heating module (101) and an annular water mist cooling module (102) in a fine adjustment basic temperature control unit, and heating the outer surface of the outer pipe and the inner surface of the inner pipe to target temperatures T1 and T2 respectively to form an active control temperature gradient delta T=T1-T2;
s3, temperature control rolling compounding: the method comprises the steps of adjusting a roller and a baffle of a rolling device (5), setting a target hole type size, enabling a prefabricated sleeved pipe blank with a temperature gradient delta T in the wall thickness direction to enter a roller gap formed by a core rod, the roller and the baffle in a surrounding mode for rolling and compounding, measuring the temperature of the outer surface of a seamless metal composite pipe after rolling and compounding by a second thermometer (4) positioned at the outlet side of the rolling device (5), feeding back and adjusting the cooling gas flow of an annular gas cooling module (301) at the inlet side of the rolling device (5), carrying out online cooling on the rolling and compounding process, counteracting the phenomenon that the temperature of an outer pipe is increased and the strength is reduced due to severe plastic deformation, guaranteeing that the temperature of the outer pipe is lower and the strength of a matrix is higher, avoiding tearing phenomenon, inhibiting a compound interface from forming intermetallic compounds at the over-high temperature, realizing high-strength metallurgical bonding of a compound interface, guaranteeing the temperature of an inner pipe to be lower and promoting coordinated deformation of component metals;
s4, fixed-length cutting and collecting: the prefabricated sleeved tube blank is rolled and compounded, the diameter is reduced, the wall thickness is reduced, the metallurgical bonding of a compound interface is realized, the final rolling state seamless metal compound tube is obtained, the head part and the tail part are removed, then the fixed-length cutting is carried out, the comprehensive performance of the target component metal and the compound interface is obtained after the gradient temperature control heat treatment, the final rolling state seamless metal compound tube is obtained, and the final rolling state seamless metal compound tube is bundled, packaged and put in storage.
4. A method for heat treatment of a seamless metal composite tube using the on-line gradient temperature control apparatus of claim 1, characterized by: the seamless metal composite pipe is sent into a gradient temperature control assembly (1) by using a conveying roller way to be heated, a temperature gradient is formed in the wall thickness direction of the outer layer pipe and the inner layer pipe, a first thermometer (2) is used for measuring the temperature of the outer surface of the seamless metal composite pipe, the opening and closing states of an electromagnetic induction heating module (101) and an annular water mist cooling module (102) in a basic temperature control unit are fed back and finely adjusted, the outer surface of the outer layer pipe and the inner surface of the inner layer pipe are respectively heated to respective heat treatment target temperatures t1 and t2, a temperature gradient delta t=t1-t 2 is formed, and the comprehensive performance of the target component metal and the composite interface is obtained after gradient temperature control heat treatment.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310268789.8A CN115971263B (en) | 2023-03-20 | 2023-03-20 | Online gradient temperature control equipment for seamless metal composite pipe and rolling and heat treatment method thereof |
| JP2023159175A JP7408206B1 (en) | 2023-03-20 | 2023-09-22 | Device for controlling gradient temperature on a line for seamless composite pipes made of metal, and method for rolling and composite seamless composite pipes made of metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310268789.8A CN115971263B (en) | 2023-03-20 | 2023-03-20 | Online gradient temperature control equipment for seamless metal composite pipe and rolling and heat treatment method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115971263A CN115971263A (en) | 2023-04-18 |
| CN115971263B true CN115971263B (en) | 2023-06-23 |
Family
ID=85965161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310268789.8A Active CN115971263B (en) | 2023-03-20 | 2023-03-20 | Online gradient temperature control equipment for seamless metal composite pipe and rolling and heat treatment method thereof |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7408206B1 (en) |
| CN (1) | CN115971263B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116393515B (en) * | 2023-06-09 | 2023-08-04 | 太原理工大学 | Continuous rolling equipment and method for thermal controllable interface of seamless metal composite pipe |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3259975A (en) * | 1963-12-19 | 1966-07-12 | Combustion Eng | Tube manufacture |
| WO1989005698A1 (en) * | 1987-12-14 | 1989-06-29 | Kawasaki Jukogyo Kabushiki Kaisha | Method of working double tube |
| JPH0890258A (en) * | 1994-09-19 | 1996-04-09 | Mitsubishi Materials Corp | Manufacture of clad pipe |
| JP2002292766A (en) * | 2001-01-23 | 2002-10-09 | Ist:Kk | Composite tubular product and manufacturing method therefor |
| JP2004292922A (en) * | 2003-03-28 | 2004-10-21 | Jfe Steel Kk | Method for manufacturing high tensile strength steel pipe of excellent combined secondary workability |
| RU2291903C1 (en) * | 2005-07-15 | 2007-01-20 | ОАО "Синарский трубный завод" | Method for pipe rolling using thermomechanical processing |
| CN101725770A (en) * | 2009-12-18 | 2010-06-09 | 西北有色金属研究院 | Palladium alloy infusible metal composite pipe and manufacture method thereof |
| CN103736727A (en) * | 2013-12-27 | 2014-04-23 | 西安建筑科技大学 | TC16 titanium alloy bar temperature control continuous rolling method |
| CN104475615A (en) * | 2014-11-25 | 2015-04-01 | 北京有色金属研究总院 | Manufacturing method of bi-metal composite finned tube |
| CN208583814U (en) * | 2018-05-21 | 2019-03-08 | 山西工程职业技术学院 | A kind of benefit temperature device of Pilger Rolling compund steel pipe |
| CN110293149A (en) * | 2019-06-10 | 2019-10-01 | 太原普莱设工程技术有限公司 | A kind of producing device and production method of the compound hollow billet of bimetallic |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4598857A (en) | 1984-04-02 | 1986-07-08 | Kawasaki Jukogyo Kabushiki Kaisha | Method of producing double-wall composite pipes |
| JPH0787941B2 (en) * | 1990-01-11 | 1995-09-27 | 川崎重工業株式会社 | Double pipe manufacturing method |
| JP3207522B2 (en) | 1992-07-09 | 2001-09-10 | 太平洋セメント株式会社 | Method for producing N-fluoropyridinium salt |
| JPH0790269B2 (en) * | 1992-07-10 | 1995-10-04 | 川崎重工業株式会社 | Method of manufacturing double-heavy pipe |
| MX339779B (en) * | 2010-01-06 | 2016-06-08 | Nippon Steel & Sumitomo Metal Corp * | Induction heating coil, device for manufacturing of workpiece, and manufacturing method. |
| CN102226486B (en) * | 2011-06-22 | 2013-05-01 | 天津理工大学 | CuAl bimetallic composite pipe and die extrusion molding method thereof |
| CN103286155B (en) * | 2012-05-09 | 2016-08-03 | 北京大学深圳研究院 | The manufacture method of cobalt/iron composite tube for coronary stent and auxiliary equipment |
| JP6261721B2 (en) | 2014-04-18 | 2018-01-17 | 三菱電機株式会社 | Energy management system |
| CN104550281A (en) * | 2014-12-22 | 2015-04-29 | 常州市腾田液压机械有限公司 | Composite pipe manufacturing process and compound forming production line |
| WO2017026455A1 (en) | 2015-08-13 | 2017-02-16 | 株式会社Ｎｔｔドコモ | Information transmission method, information processing method, base station, and mobile station |
| CN106311796A (en) * | 2016-08-17 | 2017-01-11 | 广东精艺金属股份有限公司 | Manufacturing method of metal composite pipe |
| CN106180343B (en) * | 2016-09-09 | 2018-09-07 | 哈尔滨工业大学 | A kind of dissimilar metal composite spinning differential temperature control method based on interface resistance |
| CN109092899B (en) * | 2018-06-11 | 2020-10-16 | 太原科技大学 | Push tube rolling device for high-performance magnesium alloy seamless tube |
| CN112718867B (en) | 2020-12-09 | 2022-08-26 | 太原理工大学 | Three-roller skew rolling forming method for metal composite pipe with corrugated joint surface |
| CN114378120A (en) * | 2022-02-23 | 2022-04-22 | 聊城市科环新材料科技有限公司 | Efficient cooling air cooling device for producing super-thick-wall seamless pipes |
| CN114932145B (en) * | 2022-05-23 | 2023-03-28 | 燕山大学 | Method for rolling titanium/aluminum composite plate by moving induction heating titanium plate single-roller drive |
| CN115608900B (en) * | 2022-12-16 | 2023-02-24 | 太原理工大学 | Metal clad material wave-flat radial forging compound equipment and method thereof |
| CN115608784B (en) * | 2022-12-16 | 2023-03-07 | 太原理工大学 | Large length-diameter ratio heterogeneous metal composite thin-walled tube progressive skew rolling composite equipment and method thereof |
-
2023
- 2023-03-20 CN CN202310268789.8A patent/CN115971263B/en active Active
- 2023-09-22 JP JP2023159175A patent/JP7408206B1/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3259975A (en) * | 1963-12-19 | 1966-07-12 | Combustion Eng | Tube manufacture |
| WO1989005698A1 (en) * | 1987-12-14 | 1989-06-29 | Kawasaki Jukogyo Kabushiki Kaisha | Method of working double tube |
| JPH0890258A (en) * | 1994-09-19 | 1996-04-09 | Mitsubishi Materials Corp | Manufacture of clad pipe |
| JP2002292766A (en) * | 2001-01-23 | 2002-10-09 | Ist:Kk | Composite tubular product and manufacturing method therefor |
| JP2004292922A (en) * | 2003-03-28 | 2004-10-21 | Jfe Steel Kk | Method for manufacturing high tensile strength steel pipe of excellent combined secondary workability |
| RU2291903C1 (en) * | 2005-07-15 | 2007-01-20 | ОАО "Синарский трубный завод" | Method for pipe rolling using thermomechanical processing |
| CN101725770A (en) * | 2009-12-18 | 2010-06-09 | 西北有色金属研究院 | Palladium alloy infusible metal composite pipe and manufacture method thereof |
| CN103736727A (en) * | 2013-12-27 | 2014-04-23 | 西安建筑科技大学 | TC16 titanium alloy bar temperature control continuous rolling method |
| CN104475615A (en) * | 2014-11-25 | 2015-04-01 | 北京有色金属研究总院 | Manufacturing method of bi-metal composite finned tube |
| CN208583814U (en) * | 2018-05-21 | 2019-03-08 | 山西工程职业技术学院 | A kind of benefit temperature device of Pilger Rolling compund steel pipe |
| CN110293149A (en) * | 2019-06-10 | 2019-10-01 | 太原普莱设工程技术有限公司 | A kind of producing device and production method of the compound hollow billet of bimetallic |
Non-Patent Citations (3)
| Title |
|---|
| Deformation analysis of double wall brazed tube in the multi-pass roll forming: Cross-sectional variation, stress-strain evolution and roundness assessment;Mengmeng Liu等;Journal of Manufacturing Processes;第85卷(第6期);全文 * |
| Kinematic and Thermal Analysis of Hot Piercing Rolling of Seamless Tubes;J. C. Gelin等;CIRP Annals;第37卷(第1期);全文 * |
| 复合钢管技术的应用;周历男;黑龙江冶金;第33卷(第6期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7408206B1 (en) | 2024-01-05 |
| CN115971263A (en) | 2023-04-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115971263B (en) | Online gradient temperature control equipment for seamless metal composite pipe and rolling and heat treatment method thereof | |
| CN102294456B (en) | Manufacturing method for oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank | |
| CN112453084B (en) | Preparation method of multilayer metal composite pipe | |
| US8863565B2 (en) | Three-dimensionally bending machine, bending-equipment line, and bent product | |
| CN101637983B (en) | Metallurgical bonding composite steel pipe, manufacturing method and manufacturing device thereof | |
| CN115608784B (en) | Large length-diameter ratio heterogeneous metal composite thin-walled tube progressive skew rolling composite equipment and method thereof | |
| CN110293149B (en) | Manufacturing device and manufacturing method of bimetal composite capillary | |
| CN105592954A (en) | Method for the hot forging of a seamless hollow body of material that is difficult to form, in particular of steel | |
| CN110548765A (en) | Interlayer micro-nano particle spraying auxiliary metal ultra-thin strip rolling compounding process | |
| CN113020423A (en) | Forming method of dissimilar metal laminated thin-wall cylindrical part | |
| CN103231209A (en) | Method for producing vacuum-embedded metallurgical composite bimetal seamless tube | |
| CN107262550A (en) | A kind of manufacture method of aluminium aluminium composite pipe | |
| US6240972B1 (en) | Multi-wound metal tube | |
| CN117167644A (en) | Double-layer alloy composite rod wire and production process | |
| CN115608900B (en) | Metal clad material wave-flat radial forging compound equipment and method thereof | |
| CN113458737B (en) | Hot isostatic pressing preparation process of double-wall cooling pipe suitable for fusion reactor cladding | |
| CN113941767A (en) | Low-stress control method for high-carbon steel inertia axial friction welding joint | |
| CN116393515B (en) | Continuous rolling equipment and method for thermal controllable interface of seamless metal composite pipe | |
| CN113477712A (en) | Preparation process of multilayer metal composite belt | |
| CN206887203U (en) | The hot plating copper equipment of irony wire rod, bar, tube surfaces | |
| US20230356315A1 (en) | Cold Working During Additive Manufacturing | |
| CN115592056B (en) | Large-thickness-ratio interlayer shell ring rolling compounding method based on local high-temperature strong pressure | |
| CN115673021A (en) | Temperature control method for extrusion pipe-making of nickel-based alloy for special pipe fitting of pressure vessel | |
| CN117619891A (en) | Direct hot-charging rolling compounding equipment and method for seamless metal composite pipe | |
| CN107457478A (en) | A kind of compound solid phase diffusion connection method of groove milling wall panel structure expanded and welded tube joint |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |