CN104212969B - A kind of continuous quenching process control method of steel pipe based on numerical simulation - Google Patents

A kind of continuous quenching process control method of steel pipe based on numerical simulation Download PDF

Info

Publication number
CN104212969B
CN104212969B CN201410478981.0A CN201410478981A CN104212969B CN 104212969 B CN104212969 B CN 104212969B CN 201410478981 A CN201410478981 A CN 201410478981A CN 104212969 B CN104212969 B CN 104212969B
Authority
CN
China
Prior art keywords
steel pipe
quenching
technological parameter
continuous
heating
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
Application number
CN201410478981.0A
Other languages
Chinese (zh)
Other versions
CN104212969A (en
Inventor
顾剑锋
徐骏
仝大明
郜霞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Jiaotong University
Original Assignee
Shanghai Jiaotong University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shanghai Jiaotong University filed Critical Shanghai Jiaotong University
Priority to CN201410478981.0A priority Critical patent/CN104212969B/en
Publication of CN104212969A publication Critical patent/CN104212969A/en
Application granted granted Critical
Publication of CN104212969B publication Critical patent/CN104212969B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 present invention relates to a kind of continuous quenching process control method of steel pipe based on numerical simulation, comprise the following steps: according to steel pipe movement linear velocity and quenching cooling irrigation pressure, calculate the technological parameter that continuous induction hardening process is initial, including heating process technological parameter and quenching process technological parameter；Sensing heating process continuous to steel pipe carries out finite element analysis, it is thus achieved that the relation between heating process technological parameter and steel pipe surfaces externally and internally temperature；Steel pipe quenching cooling procedure is carried out finite element analysis, it is thus achieved that the relation between quenching process technological parameter and steel pipe tissue distribution patterns；According to process control needs, obtain heating process technological parameter and the quenching process technological parameter meeting process control needs, form final steel pipe continuous induction hardening process control parameters；With the control state modulator continuous quenching process of actual steel pipe obtained.Compared with prior art, the present invention has minimizing and determines, by trial-production, the energy resource consumption that technological parameter is caused, and improves the advantages such as work efficiency.

Description

A kind of continuous quenching process control method of steel pipe based on numerical simulation
Technical field
The present invention relates to a kind of continuous quenching technical of steel pipe, especially relate to a kind of steel pipe connecting based on numerical simulation Continuous quenching process control method.
Background technology
Steel pipe quenching heat treatment plays a very important role for the lifting of steel pipe overall performance.Its quenching technical is Steel pipe is heated to austenitizing temperature, after being allowed to all or part of austenitizing, with more than critical cooling rate Speed is cooled to below Ms point soon.After quenching cooling, steel pipe be organized as martensite, bainite and a small amount of remaining difficult to understand Family name soma.
The continuous heat treatment apparatus of current domestic steel pipe is mainly step-by-step movement flame furnace or resistance furnace.This mode of production Technique is simple, equipment cost is relatively low, but energy consumption is higher, seriously polluted.When using this equipment to carry out heat treatment, Need strict control steel pipe length.Additionally, due to heat time heating time is longer so that the efficiency of continuous flow procedure is significantly Reduce.Under the modern industrialization trend that energy-saving and emission-reduction are the theme, this mode of production is by progressively by new heat treatment Mode is eliminated.
Joule-Lenz that electromagnetic inductive heating principle is mainly Faraday law of electromagnetic induction and heating effect of current is fixed Rule.When reguline metal is in the magnetic field of change in induction furnace, inducing eddy-current in metal derby, can be produced.By Minimum in metal resistor chip, eddy current is the strongest, and discharges substantial amounts of heat, utilizes just in induction furnace This vortex heat adds thermometal.
Sensing heating process cleanliness without any pollution, and completely can be by Digital Circuit Control, it is easy to accomplish automatization gives birth to continuously Produce.Steel pipe in sensing heating rear surface oxidation seldom, does not has decarburization substantially, and steel pipe presentation quality is good.Add in sensing In hot heat treatment process, heat time heating time is the shortest, heats up quickly, continuous heat ultrahigh in efficiency.Additionally, sensing adds Thermal source is workpiece itself, and heat loss is less.According to statistics, the sensing heating low 30%-50% of energy consuming ratio flame furnace, Lower 20%-30% than resistance furnace.
At present external induction heat treatment stove have been obtained in the heat treatment of steel pipe especially petroleum steel pipe application and Development.As Long Sita iron company of the U.S. and Kawasaki, Japan iron company all use intermediate-frequency induction heating stove.State's inner saddle Steel and Xining special steel etc. have been referred in steel pipe's production the most.But, steel pipe is in induction heat treatment production process There is physical field complicated, material property parameter and inductive electromagnetic Parameters variation are big, and quenching structure and performance difference are notable Etc. feature.Therefore, higher to equipment and technological requirement.Commonly use in terms of formulating induction heat treatment process at present The method of experience trial and error carrys out adjusting process parameter, has bigger occasionality and irrationality, causes equipment It is greatly increased with the cost of technological design.Chinese patent application " the intermediate-frequency induction heating device of a kind of steel pipe and Heat treatment method " (Patent publication No: CN 1023638535A) provide a kind of thin-wall steel tube Medium frequency induction heat Processing means and heat treatment method thereof.The thin-wall seamless pipe of wall thickness about 2mm is carried out sensing and is heated to 1200 DEG C Only need 2s.But for the steel pipe that wall thickness is bigger, due to kelvin effect, its section temperature differs greatly.Nearly appearance Face heating rate is far above internal heating rate.The bigger temperature difference, will result in steel pipe and is heated uneven, causes quenching Soft spots, hardness are not enough, and severe patient will cause cracking, and therefore range of application compares limitation.
Steel pipe induction heat treatment process is and many things field of complexity, high temperature, dynamic and instantaneous process, though sharp Also the physical property change of material internal it is difficult to observe by with special sensing detecting instrument.Therefore, to steel pipe in sense The technological parameter in heat treatment production process is answered to be optimized research the most necessary.
Summary of the invention
Defect that the purpose of the present invention is contemplated to overcome above-mentioned prior art to exist and a kind of steel pipe sense of continuity is provided Induction quenching process Parameters design, utilizes method for numerical simulation, it was predicted that the quality of product, reduces test number (TN), Optimizing Process Parameters, and then determine optimal process design parameter, reduce and determine that technological parameter is caused by trial-production Energy resource consumption, improve work efficiency.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of continuous quenching process control method of steel pipe based on numerical simulation, described steel pipe continuous quenching process bag Include:
Steel pipe senses heating process continuously: steel pipe moves along a straight line on carrying roller with certain linear velocity, premenstrual aligning traction Machine travel pulls, and enters and carries out austenitizing in induction apparatus group, and heating terminates through air cooling section natural cooling；
Steel pipe quenching cooling procedure: steel pipe enters flash quenching cooling chamber, is cooled into martensite or bainite structure；
Described control method specifically includes following steps:
Step one, according to steel pipe movement linear velocity and quenching cooling irrigation pressure, calculate at the beginning of continuous induction hardening process The technological parameter begun, including heating process technological parameter and quenching process technological parameter；
Step 2, sensing heating process continuous to steel pipe carry out finite element analysis, it is thus achieved that heating process technological parameter with Relation between steel pipe surfaces externally and internally temperature；
Step 3, the cooling procedure that quenches steel pipe carry out finite element analysis, it is thus achieved that quenching process technological parameter and steel pipe Relation between tissue distribution patterns；
Step 4, according to process control needs and step 2, the result of three, obtain and meet adding of process control needs Thermal process technological parameter and quenching process technological parameter, form final steel pipe continuous induction hardening process control ginseng Number；
Step 5, the control state modulator continuous quenching process of actual steel pipe obtained with step 4.
Described heating process technological parameter includes heat time heating time, air cooling time and coil magnetization electric current and frequency；
Described quenching process technological parameter includes the heat exchange system between cool time and steel pipe and hardening media that quenches Number.
Described step 2 particularly as follows:
201) geometric model of steel pipe, induction coil and air is set up；
202) pcrmeability of steel pipe, resistivity, heat conductivity, specific heat capacity in 20-1000 DEG C of temperature range is obtained With density and induction coil and the relative permeability of air；
203) calculate the kelvin effect degree of depth of steel pipe, carry out stress and strain model, during grid division, net according to this degree of depth Lattice density is outwards successively decreased by steel tube surface；
The computing formula of described kelvin effect degree of depth δ is as follows:
δ = 1 2 π ρ × 10 9 μ r f
Wherein, ρ is the resistivity of steel pipe, μrFor the relative permeability of steel pipe, f is coil magnetization power frequency；
204) sensing heating cycle is set, load step is set according to the heating process technological parameter that step one calculates；
205) carry out grid inspection and physical examination, it may be judged whether there is mistake, the most then point out error message, If it is not, then perform step 206)；
206) temperature preserving sensing each stage of heating changes over situation and outer surface of steel tube and inner surface temperature Difference changes over situation.
Described step 201) in, when setting up steel pipe and induction coil model, Moving Objects model is equivalent to quiet Only object model.
Described step 204) in, sensing heating cycle is set and includes that setting air outer edge magnetic potential is zero, sets Heat exchange coefficient between alignment circle exciting current and frequency, setting air and steel pipe and radiation coefficient.
Described step 3 particularly as follows:
301) the steel pipe model of quenching cooling procedure is set up；
302) hexahedron eight node unit is used to carry out stress and strain model；
303) specific heat of steel pipe, thermal conductivity, enthalpy of phase change and transition kinetics in 20-1000 DEG C of temperature range of acquisition Parameter；
304) boundary condition of quenching process is set；
305) the quenching process technological parameter calculated according to step one arranges quenching cooling load step；
306) carry out grid inspection and physical examination, it may be judged whether there is mistake, the most then point out error message, If it is not, then perform step 307)；
307) preserve the tissue after temperature situation over time and steel pipe quenching terminate in quenching cooling procedure to divide Cloth situation.
Described step 301) in, when setting up steel pipe model, using steel pipe cross section as computation model.
In described step 4, process control needs is: in heating process, the temperature difference of steel pipe surfaces externally and internally reaches to set Tissue distribution after scope and steel pipe quenching reaches set point.
Compared with prior art, the invention have the benefit that
1, the continuous induction hardening equipment of steel pipe that the present invention uses is Multi-stage heating, multistage cooling technique, decreases The steel pipe temperature difference in heat treatment process.
2, the present invention is by effectively combining Computer Numerical Simulation and actual process layout drawing technology, comprehensively Play Computer Numerical Simulation advantage in terms of simulation and prediction, to realize the design of steel pipe continuous induction hardening process Optimize, with the process parameter control steel pipe continuous induction hardening process after optimizing, decrease and determine technique by trial-production The energy resource consumption that parameter is caused, improves work efficiency.
Accompanying drawing explanation
Fig. 1 is the steel pipe continuous induction hardening set technique horizontal layout schematic diagram that the embodiment of the present invention uses；
Fig. 2 is spray cooling chamber structural representation in the embodiment of the present invention；
Fig. 3 is the schematic flow sheet of control method of the present invention；
Fig. 4 is steel pipe symmetry model schematic diagram；
Fig. 5 is induction coil group symmetry model schematic diagram；
Fig. 6 is steel pipe cross-sectional model schematic diagram；
Fig. 7 is that steel pipe senses heating process surfaces externally and internally temperature schematic diagram；
Fig. 8 is cross section Temperature Distribution schematic diagram from inside to outside after steel pipe sensing heating；
Fig. 9 is air cooling cross section Temperature Distribution schematic diagram from inside to outside after 1 second after steel pipe sensing heating；
Figure 10 is steel pipe cross section radially each position tissue distribution schematic diagram under 0.3MPa irrigation pressure；
Figure 11 is steel pipe cross section radially each position tissue distribution schematic diagram under 0.5MPa irrigation pressure.
In figure: 1, front aligning traction machine, 2, sensing heater group, 3, carrying roller, 4, steel pipe, 5, air cooling section, 6, the first flash quenching cooling chamber, the 7, second flash quenching cooling chamber, 8, power control pod with middle frequency, 9, low frequency Electrical power control cabinet, 10, nozzle, 11, quenching cooling chamber outer wall.
Detailed description of the invention
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with the technology of the present invention side Implement premised on case, give detailed embodiment and concrete operating process, but the protection model of the present invention Enclose and be not limited to following embodiment.
As depicted in figs. 1 and 2, the steel pipe continuous induction hardening complexes that the embodiment of the present invention uses include successively Front aligning traction machine 1, sensing heater group 2 and the flash quenching cooling chamber connected.Sensing heater group 2 is 14 Organizing separate induction heater, first 10 groups is low frequency heating section, two low-frequency power switch boards 9 carry out Control；Latter 4 groups is heating in medium frequency section, two power control pod with middle frequency 8 control.Often between group sensing heater Being equipped with a bicone V-type carrying roller 3, carrying roller bus angle is 135 °.Often group sensing heater is by 10 knots The coil that structure is identical is constituted, and coil section is rectangle, and wide 22mm, high 20mm, thick 4.5mm, in coil groups Footpath 305mm, each coil-span 30mm.Often group actually active action length 750mm of induction apparatus, spacing 950mm。
One section of air cooling section 5 is had between sensing heater group 2 and flash quenching cooling chamber.
Quenching process uses two stage split quenching cooling chamber distribution, including the first flash quenching cooling chamber 6 being connected With the second flash quenching cooling chamber 7, each flash quenching cooling chamber is by 12 expulsion pressure adjustable spray guns edge weeks To being arranged into spray circle.
The continuous quenching process of steel pipe particularly as follows: the seamless steel pipe material of 12m length is 35CrMo, external diameter 139.7mm, Wall thickness 7.72mm, steel pipe 4 moves along a straight line on carrying roller with certain linear velocity, and the traction of premenstrual aligning traction machine pulls, Enter in induction apparatus group and carry out austenitizing；Heating terminates rear air cooling section natural cooling, and the temperature difference is decreased to zone of reasonableness Within, complete steel pipe and sense heating process continuously；Steel pipe enter flash quenching cooling chamber, flash quenching cooling chamber by Nozzle 10 circumferentially constitutes spray circle, and quenching cooling chamber outer wall 11 section of outline is regular hexagon, to austenite Steel pipe after change is quickly cooled to M in high-pressure water mistsBelow Dian, form martensite or bainite structure, complete Steel pipe quenching cooling procedure.
As it is shown on figure 3, the continuous quenching process controlling party of steel pipe based on numerical simulation that the embodiment of the present invention provides Method, comprises the following steps:
Step one, according to steel pipe movement linear velocity and quenching cooling irrigation pressure, calculate at the beginning of continuous induction hardening process The technological parameter begun, including heating process technological parameter and quenching process technological parameter.Heating process technological parameter bag Include heat time heating time, air cooling time and coil magnetization electric current and frequency；Quenching process technological parameter includes quenching cooling The coefficient of heat transfer between time and steel pipe and hardening media.
In the present embodiment, steel pipeline speed takes 300mm/s, and the most often group induction furnace heat time heating time is 2.5s, is spaced cold But the time is 3.17s.1-10 group induction furnace operating current is 4750A, and induction frequencies is 500Hz；11-14 group is felt Answering stove operating current is 6350A, and induction frequencies is 800Hz.Cooling procedure is: when for the first time and spraying water for the second time Between be 4s, twice water spray is spaced apart 2s.Only 2 times water sprays of physical device quenching and a middle air cooling. But considering after leaving quenching apparatus section, steel pipe still it may happen that partial phase change, causes finally organizing and quenches with just leaving The tissue of fire section is not consistent.Thus supplement one section of air cooling, the time is set as 2 minutes, in order to calculates and determines Whole tissue distribution.
Step 2, sensing heating process continuous to steel pipe carry out finite element analysis, it is thus achieved that heating process technological parameter with Relation between steel pipe surfaces externally and internally temperature, as Figure 7-9, Fig. 7 be heating process surfaces externally and internally temperature at any time Between variation diagram, Fig. 8 is that heating process terminates rear surfaces externally and internally temperature profile, Fig. 9 be after 1s air cooling in Hull-skin temperature scattergram.
The present embodiment uses commercial Flux software to be simulated, specific as follows:
201) geometric model of steel pipe, induction coil and air is set up.Induction coil and steel pipe all have axial symmetry Feature, steel pipe arbitrary cross section all experiences the most on all four sensing heating process during by coil, Thus Moving Objects model equivalence is changed into stationary objects and calculates, simplify threedimensional model is axial symmetry two simultaneously Dimension module models.Utilize Flux pre-treating device module to be modeled or from other modeling software, read in geometric model, As shown in fig. 4-5.
202) pcrmeability of steel pipe, resistivity, heat conductivity, specific heat capacity in 20-1000 DEG C of temperature range is obtained With density and induction coil and the relative permeability of air.
203) the Skin Depth using Flux Supervisor calculates the kelvin effect degree of depth of steel pipe, deep according to this Degree carries out stress and strain model, and during grid division, mesh-density is outwards successively decreased by steel tube surface.
The computing formula of kelvin effect degree of depth δ is as follows:
δ = 1 2 π ρ × 10 9 μ r f
Wherein, ρ is the resistivity of steel pipe, μrFor the relative permeability of steel pipe, f is coil magnetization power frequency.
204) sensing heating cycle is set, is zero including setting air outer edge magnetic potential, sets coil magnetization electricity Stream and frequency, setting air and steel pipe between heat exchange coefficient and radiation coefficient, by definition material give different Model area, and load step is set according to the heating process technological parameter of step one calculating.
205) carry out grid inspection and physical examination, it may be judged whether there is mistake, the most then point out error message, And get rid of, if it is not, then start to perform computer finite element solving, perform step 206).
206) temperature preserving sensing each stage of heating changes over situation and outer surface of steel tube and inner surface temperature Difference changes over situation.
Step 3, the cooling procedure that quenches steel pipe carry out finite element analysis, it is thus achieved that quenching process technological parameter and steel pipe Relation between tissue distribution patterns, as shown in figs. 10-11, Figure 10 is 0.3MPa hydraulic pressure jet hardening cooling knot Shu Hou, steel pipe cross section radially each position tissue distribution figure, Figure 11 is 0.5MPa hydraulic pressure jet hardening cooling After end, steel pipe cross section radially each position tissue distribution figure.
The present embodiment uses MSC.MARC software and phase transformation subprogram thereof to be simulated, specific as follows:
301) the steel pipe model of quenching cooling procedure is set up.In view of in actual quenching process, steel pipe is at production line Upper uniform motion, along its length, the quenching situation approximation of each position is completely the same, thus can be to computation model Carry out suitable simplification, only take steel pipe cross section (length 1mm) as computation model, as shown in Figure 6.
302) hexahedron eight node unit is used to carry out stress and strain model.
303) specific heat of steel pipe, thermal conductivity, enthalpy of phase change and transition kinetics in 20-1000 DEG C of temperature range of acquisition Parameter (TTT curve).
304) boundary condition of quenching process is set.Its outer surface is sprayed water or air heat-exchange effect, by the 3rd Class boundary condition sets the coefficient of heat transfer between steel pipe and hardening media；Inner surface is only by air heat-exchange effect, by Three class boundary conditions set the coefficient of heat transfer between steel pipe and air.
305) the quenching process technological parameter calculated according to step one arranges quenching cooling load step, arranges steel pipe Initial temperature be 900 DEG C.
306) carry out grid inspection and physical examination, it may be judged whether there is mistake, the most then point out error message, If it is not, then start to perform computer finite element solving, perform step 307)；
307) preserve the tissue after temperature situation over time and steel pipe quenching terminate in quenching cooling procedure to divide Cloth situation.
Step 4, according to process control needs and step 2, the result of three, obtain and meet adding of process control needs Thermal process technological parameter and quenching process technological parameter, form final steel pipe continuous induction hardening process control ginseng Number.
Process control needs is: after in heating process, the temperature difference of steel pipe surfaces externally and internally reaches set point and steel pipe quenching Tissue distribution reach set point.In the present embodiment, it is desirable to outer surface 880-950 DEG C at the end of heating, interior 830-900 DEG C of table, after air cooling section 5, the steel pipe surfaces externally and internally temperature difference is not higher than 5 DEG C.
Step 5, the control state modulator continuous quenching process of actual steel pipe obtained with step 4.
Can be obtained by Fig. 7-9, after heating terminates, the surfaces externally and internally temperature difference reaches 16.4 DEG C, after 1s air cooling, and the temperature difference Reduce to 6.87 DEG C, reach necessary requirement.This time is converted into a length of 300mm of roller-way of air cooling section, it is considered to To calculating error and safety factors, it is proposed that the roller-way length of setting should take more than 2 times of 300mm.
From Figure 10 and Figure 11, spraying hydraulic pressure directly changes the effect of quenching, if hydraulic pressure is 0.3MPa, Final tissue essentially bainite, and increase hydraulic pressure to 0.5MPa, the most finally it is organized as martensite.Therefore, as The final quenching structure needing steel pipe is bainite, then need to set the spraying hydraulic pressure of less (0.3MPa)；Phase Answer, be martensite if desired for final quenching structure, then need to use the spraying hydraulic pressure of relatively big (0.5MPa).

Claims (6)

1. the continuous quenching process control method of steel pipe based on numerical simulation, it is characterised in that described steel Pipe continuous quenching process includes:
Steel pipe senses heating process continuously: steel pipe moves along a straight line on carrying roller with certain linear velocity, premenstrual aligning traction Machine travel pulls, and enters and carries out austenitizing in induction apparatus group, and heating terminates through air cooling section natural cooling；
Steel pipe quenching cooling procedure: steel pipe enters flash quenching cooling chamber, is cooled into martensite or bainite structure；
What the continuous induction hardening equipment of steel pipe that the continuous quenching process of described steel pipe uses included being sequentially connected with front rectifys Straight traction machine, sensing heater group and flash quenching cooling chamber, described sensing heater group is separate sensing Heating furnace, has one section of air cooling section between described sensing heater group and described flash quenching cooling chamber；
Described control method specifically includes following steps:
Step one, according to steel pipe movement linear velocity and quenching cooling irrigation pressure, calculate at the beginning of continuous induction hardening process The technological parameter begun, including heating process technological parameter and quenching process technological parameter；
Step 2, sensing heating process continuous to steel pipe carry out finite element analysis, it is thus achieved that heating process technological parameter with Relation between steel pipe surfaces externally and internally temperature；
Step 3, the cooling procedure that quenches steel pipe carry out finite element analysis, it is thus achieved that quenching process technological parameter and steel pipe Relation between tissue distribution patterns；
Step 4, according to process control needs and step 2, the result of three, obtain and meet adding of process control needs Thermal process technological parameter and quenching process technological parameter, form final steel pipe continuous induction hardening process control ginseng Number；
Step 5, the control state modulator continuous quenching process of actual steel pipe obtained with step 4；
Described step 2 particularly as follows:
201) geometric model of steel pipe, induction coil and air is set up；
202) pcrmeability of steel pipe, resistivity, heat conductivity, specific heat capacity in 20-1000 DEG C of temperature range is obtained With density and induction coil and the relative permeability of air；
203) calculate the kelvin effect degree of depth of steel pipe, carry out stress and strain model, during grid division, net according to this degree of depth Lattice density is outwards successively decreased by steel tube surface；
The computing formula of described kelvin effect degree of depth δ is as follows:
δ = 1 2 π ρ × 10 9 μ r f
Wherein, ρ is the resistivity of steel pipe, μrFor the relative permeability of steel pipe, f is coil magnetization power frequency；
204) sensing heating cycle is set, load step is set according to the heating process technological parameter that step one calculates；
205) carry out grid inspection and physical examination, it may be judged whether there is mistake, the most then point out error message, If it is not, then perform step 206)；
206) temperature preserving sensing each stage of heating changes over situation and outer surface of steel tube and inner surface temperature Difference changes over situation；
Described step 201) in, when setting up steel pipe and induction coil model, Moving Objects model is equivalent to quiet Only object model.
A kind of continuous quenching process control method of steel pipe based on numerical simulation the most according to claim 1, It is characterized in that, described heating process technological parameter includes heat time heating time, air cooling time and coil magnetization electric current And frequency；
Described quenching process technological parameter includes the heat exchange system between cool time and steel pipe and hardening media that quenches Number.
A kind of continuous quenching process control method of steel pipe based on numerical simulation the most according to claim 1, It is characterized in that, described step 204) in, sensing heating cycle is set and includes setting air outer edge magnetic potential Be zero, the heat exchange coefficient that sets between coil magnetization electric current and frequency, setting air and steel pipe and radiation coefficient.
A kind of continuous quenching process control method of steel pipe based on numerical simulation the most according to claim 1, It is characterized in that, described step 3 particularly as follows:
301) the steel pipe model of quenching cooling procedure is set up；
302) hexahedron eight node unit is used to carry out stress and strain model；
303) specific heat of steel pipe, thermal conductivity, enthalpy of phase change and transition kinetics in 20-1000 DEG C of temperature range of acquisition Parameter；
304) boundary condition of quenching process is set；
305) the quenching process technological parameter calculated according to step one arranges quenching cooling load step；
306) carry out grid inspection and physical examination, it may be judged whether there is mistake, the most then point out error message, If it is not, then perform step 307)；
307) preserve the tissue after temperature situation over time and steel pipe quenching terminate in quenching cooling procedure to divide Cloth situation.
A kind of continuous quenching process control method of steel pipe based on numerical simulation the most according to claim 4, It is characterized in that, described step 301) in, when setting up steel pipe model, using steel pipe cross section as computation model.
A kind of continuous quenching process control method of steel pipe based on numerical simulation the most according to claim 1, It is characterized in that, in described step 4, process control needs is: the temperature difference of steel pipe surfaces externally and internally in heating process Reach the tissue distribution after set point and steel pipe quenching and reach set point.
CN201410478981.0A 2014-09-18 2014-09-18 A kind of continuous quenching process control method of steel pipe based on numerical simulation Active CN104212969B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410478981.0A CN104212969B (en) 2014-09-18 2014-09-18 A kind of continuous quenching process control method of steel pipe based on numerical simulation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410478981.0A CN104212969B (en) 2014-09-18 2014-09-18 A kind of continuous quenching process control method of steel pipe based on numerical simulation

Publications (2)

Publication Number Publication Date
CN104212969A CN104212969A (en) 2014-12-17
CN104212969B true CN104212969B (en) 2016-11-30

Family

ID=52094871

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410478981.0A Active CN104212969B (en) 2014-09-18 2014-09-18 A kind of continuous quenching process control method of steel pipe based on numerical simulation

Country Status (1)

Country Link
CN (1) CN104212969B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3358023A4 (en) * 2015-09-30 2019-05-01 Hitachi Metals, Ltd. Method for deriving cooling time when quenching steel material, method for quenching steel material, and method for quenching and tempering steel material
CN105631111A (en) * 2015-12-25 2016-06-01 河海大学常州校区 Method for predicting step shaft induction quenching martensite distribution
CN105653770B (en) * 2015-12-25 2018-11-06 河海大学常州校区 A kind of prediction technique of continuous induction hardening depth of hardening zone
CN105930605A (en) * 2016-04-29 2016-09-07 河海大学常州校区 Quench hardening layer depth measurement method for induction quenching treatment shaft part
CN106682346A (en) * 2017-01-05 2017-05-17 中南大学 Method for optimizing complicated member gas-quenching system based on CFD software
CN109117493B (en) * 2018-06-20 2022-04-26 江铃汽车股份有限公司 Heat radiator rack thermal performance data processing method
CN109777942B (en) * 2019-01-31 2020-06-02 中国石油大学(华东) Welding stress and deformation regulation and control method for local postweld heat treatment of ultra-large pressure container
CN112084603B (en) * 2020-09-17 2022-03-15 泰尔重工股份有限公司 Method for acquiring quenching and heating technological parameters of heavy-load universal shaft fork head
CN112149333B (en) * 2020-09-28 2023-10-31 上海交通大学 Bearing raceway laser-induction composite quenching process parameter optimization method
CN113361157B (en) * 2021-05-27 2022-06-24 燕山大学 Motion simulation method for electromagnetic heat treatment of offshore oil steel pipe

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100422353C (en) * 2007-06-28 2008-10-01 朱兴发 Medium frequency induction heating treatment method for steel pipe, petroleum well pipe and drill pipe
JP5286623B2 (en) * 2009-03-25 2013-09-11 高周波熱錬株式会社 Induction hardening simulation equipment
CN104032112B (en) * 2014-06-17 2016-01-20 东北大学 A kind of multi-functional heat treatment system of steel pipe

Also Published As

Publication number Publication date
CN104212969A (en) 2014-12-17

Similar Documents

Publication Publication Date Title
CN104212969B (en) A kind of continuous quenching process control method of steel pipe based on numerical simulation
Li et al. Numerical simulation and experimental investigation on the induction hardening of a ball screw
CN102649994A (en) Surface treatment system, a surface treatment process and a system treated component
CN208964980U (en) Ring flange internal spline impewdance matching inductor
CN102796863A (en) Method used for local postweld heat treatment of large-size steel casting after rewelding
CN104561462B (en) A kind of bainite and martensite Multiphase Steel/iron progressive austempering heat treatment method and device
CN206244831U (en) A kind of ring-type quenching inducer
CN103710529B (en) Q235 steel structure property predicating method based on ultra-fast cooling system
CN202705418U (en) Inductive quenching processing device of Cr12MoV roller
Shen et al. Investigation of recrystallization behavior of large sized Nb–V microalloyed steel rod during thermomechanical controlled processing
CN209778937U (en) Quenching device for heat treatment of workpiece
CN201634733U (en) Synchronous strong convection cooling device for monolith in circular protective atmosphere
CN107052080B (en) A kind of hot-pressed three-way pipe fitting pipe partition heating temperature controlling instruments and its heated for controlling temperature method
CN102912087A (en) Process for quenching surface of 20 steel pipe without flexible overlap strip by plasma arc through carburizing
CN106964658A (en) A kind of hot rolled seamless steel tube processing method and its device
CN202048800U (en) Inductor cooling water jacket for line-frequency induction smelting furnace
CN208293035U (en) A kind of induction coil being adapted to Quench heating
CN204898015U (en) Fork truck semi -axis intermediate frequency response quenching inductor
CN111647731A (en) Cryogenic treatment method for ultra-large stainless steel structural member
CN207533968U (en) A kind of increasing material manufacturing local uniform heat dissipation online processing device
CN202157101U (en) Uniform cooling device used for heat treatment of metal pipes
CN203304294U (en) Seamless steel tube efficient rolling control water cooling device
CN203382799U (en) Roller rod composite normalizing and annealing furnace
CN104250679A (en) Roller rod composite normalizing and annealing furnace
CN204185515U (en) A kind of revolving parts end hardening inductor block

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant