CN106650112A - Method and device for acquiring thermal extrusion technological parameters of nickel base alloy tube stock - Google Patents
Method and device for acquiring thermal extrusion technological parameters of nickel base alloy tube stock Download PDFInfo
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Abstract
The invention provides a method and a device for acquiring thermal extrusion technological parameters of a nickel base alloy tube stock. The method comprises the following steps: performing numerical simulation analysis for a thermal extrusion process of a tube blank on a thermal extrusion model, thereby acquiring an optimal criterion data of the tube blank under multiple sets of different thermal extrusion technological parameter alternative data; constructing a relation curve between each thermal extrusion technological parameter and the optimal criterion data and confirming a value interval of the thermal extrusion technological parameter corresponding to each optimal criterion datum according to the relation curve and a preset criterion selection condition; performing intersection treatment on the value intervals of the same thermal extrusion technological parameter corresponding to all the optimal criterion data, thereby acquiring optimal values of the thermal extrusion technological parameters. According to the invention, multiple technological parameters of the nickel base alloy tube stock in a thermal extrusion process can be more accurately acquired and the practical production can be more effectively guided.
Description
Technical field
The present invention relates to tubing Hot-extrusion field, in particular to a kind of nickel-base alloy tubing hot extrusion technique
Parameter acquiring method and device.
Background technology
With the development of China's energy industry and petrochemical industry, the demand of nickel-base alloy seamless tubular goods constantly increases
Greatly, such as the superheater tube that 700 DEG C of ultra supercritical thermal power station boilers are used, the oil well casing that oil exploitation is used, nuclear power station
Heat-transfer pipe of steam generator etc..The production of nickel-base alloy seamless tubular goods mainly combines cold rolling technology mode by hot extrusion,
Wherein hot extrusion process is the core link of whole production.As a kind of special thermal deformation mode, crimp area three-dimensional pressure
Stress state can improve the deformability of material, but due to the alloying level of nickel-base alloy itself it is higher, under its high temperature
Resistance of deformation is larger, and resistance of deformation variation with temperature is very sensitive, and hot extrusion process itself is accompanied by violent local
Heat up, so nickel-base alloy tubing hot extrusion process is related to the Thermal-mechanical Coupling effect of complexity, and while there is the obvious time
Effect.From the point of view of the condition of production of current domestic enterprise, the lumber recovery of nickel-base alloy tubing hot extrusion is generally relatively low, there is hollow forging
Cannot smoothly extrude (" vexed car "), hollow forging underbead crack, surface quality difference and interior tissue cannot be up to standard etc. quality problems, and this
A little problems Jing are often combined there is and exists mutually restriction.
Hot extrusion hollow forging quality depends on the optimization of squeezing parameter, the core process parameter master of nickel-base alloy tubing hot extrusion
Including：Extrusion speed, pipe preheating temperature and extrusion ratio.Every kind of squeezing parameter is respectively provided with larger to hot extrusion hollow forging quality
Affect, and there is interaction between each technological parameter.For the optimization method of Hot Extrusion Parameters is mainly divided to two classes：The
One class is that actual examination extruding (trial-and-error method) is carried out on extrusion equipment, gropes best parameter group, and such method needs to consume big
Buret base, causes high cost and the wasting of resources；Equations of The Second Kind is to adopt numerical simulation technology, and extrusion process is entered by computer
Simultaneously adjusting process parameter value is further optimized for row emulation.At present, tubing hot extrusion parameter is optimized by method for numerical simulation
Research mainly for single or part hollow forging quality problems, comprehensive analysis is not carried out to produced problem in actual production.
Because all kinds of quality problems have interrelated and restriction, the material behaviors such as deformation, temperature rise and phase transformation are directed to, so being directed to
Part mass problem and it is preferred that the process parameters range for going out is broad, it is impossible to actual production is effectively instructed.
The content of the invention
In view of this, the purpose of the embodiment of the present invention is to provide a kind of nickel-base alloy tubing Hot Extrusion Parameters to obtain
Method and device, can more accurately be obtained for kinds of processes parameter of the nickel-base alloy tubing in hot extrusion process
Take, significantly more efficient guidance is carried out to actual production.
In a first aspect, embodiments providing a kind of nickel-base alloy tubing Hot Extrusion Parameters acquisition methods, wrap
Include：
The numerical simulation analysis of pipe hot extrusion process are carried out to hot extrusion model, multigroup different hot extrusion technique ginsengs are obtained
The optimized criterion data of the pipe under number alternate data；The Hot Extrusion Parameters include：Hot extrusion speed, pipe preheating temperature
Degree and hot extrusion ratio；The optimized criterion data include：The maximum temperature of pipe, extruding overall process middle mold in extruding overall process
The crystallite dimension of the maximum temperature, extrusion load peak value and hollow forging of tool；
The relation curve between each Hot Extrusion Parameters and optimized criterion data is built, and it is bent according to the relation
Line and default criterion alternative condition, determine the value area of the Hot Extrusion Parameters corresponding to each optimized criterion data
Between；
Common factor process is carried out to the interval of the same Hot Extrusion Parameters corresponding to all optimized criterion data,
Obtain the preferred value of Hot Extrusion Parameters.
With reference in a first aspect, embodiments provide the first possible embodiment of first aspect, wherein：Institute
Stating carries out the numerical simulation analysis of pipe hot extrusion process to hot extrusion model, obtains multigroup different Hot Extrusion Parameters values
Under the optimized criterion data of pipe specifically include：
The true stress-true strain curve or constitutive equation of blank tube material are obtained, and is obtained corresponding to the blank tube material
The microstructure Evolution Mathematical Modeling comprising Dynamic Recrystallization；
According to the true stress-true strain curve or constitutive equation, and according to the microstructure Evolution Mathematical Modeling, make
The numerical simulation analysis of pipe hot extrusion process are carried out to the hot extrusion model with limited element analysis technique, each group of hot extrusion is obtained
Thermo parameters method data, the thermo parameters method data of mould, the Grain size distribution of hollow forging of the pipe under pressure technological parameter value
Data and extrusion load change over data；
The thermo parameters method data of thermo parameters method data, mould according to the pipe, the Grain size distribution number of hollow forging
Data are changed over according to extrusion load, the optimized criterion number of the pipe under each group of Hot Extrusion Parameters value is obtained
According to.
With reference in a first aspect, embodiments provide second possible embodiment of first aspect, wherein：Also
Including：The value of adjustment Hot Extrusion Parameters, obtains multigroup Hot Extrusion Parameters alternate data.
With reference in a first aspect, embodiments provide the third possible embodiment of first aspect, wherein：Institute
Stating default criterion alternative condition includes：Initial melting temperature of the maximum temperature of pipe less than blank tube material；The maximum temperature of mould
Less than the softening temperature of mold materials；Extruding peak load is not higher than equipment utmost carrying ability；The crystallite dimension of hollow forging is brilliant with target
Particle size difference is less than or equal to 10 μm.
With reference in a first aspect, embodiments provide the 4th kind of possible embodiment of first aspect, wherein：Institute
The true stress-true strain curve for stating acquisition blank tube material is specifically included：
Pipe is drawn materials, laboratory sample is obtained；
High temperature compressed experiment is carried out to laboratory sample, the corresponding true stress-true strain curve of blank tube material is obtained；
Wherein, the temperature span of the high temperature compressed experiment is 0.7*Tm～0.9*Tm, and strain rate scope is
0.1s-1～10s-1；Tm is alloy melting point.
With reference in a first aspect, embodiments provide the 5th kind of possible embodiment of first aspect, wherein：Institute
After stating the preferred value for obtaining Hot Extrusion Parameters, also include：
Using the preferred value, blank tube material carries out actual verification.
Second aspect, the embodiment of the present invention also provides a kind of nickel-base alloy tubing Hot Extrusion Parameters acquisition device, bag
Include：
Numerical simulation analysis unit, for carrying out the numerical simulation analysis of pipe hot extrusion process to hot extrusion model, obtains
Take the optimized criterion data of the pipe under multigroup different Hot Extrusion Parameters alternate datas；The Hot Extrusion Parameters bag
Include：Hot extrusion speed, pipe preheating temperature and hot extrusion ratio；The optimized criterion data include：Pipe in extruding overall process
Maximum temperature, extruding overall process in mould maximum temperature, extrusion load peak value and hollow forging crystallite dimension；
Relation curve member unit, for building the relation between each Hot Extrusion Parameters and optimized criterion data
Curve,
Interval determining unit, for according to the relation curve and default criterion alternative condition, determining each
Plant the interval of the Hot Extrusion Parameters corresponding to optimized criterion data；
It is preferred that value acquiring unit, for the same Hot Extrusion Parameters corresponding to all optimized criterion data
Interval carries out common factor process, obtains the preferred value of Hot Extrusion Parameters.
With reference to second aspect, the first possible embodiment of second aspect is embodiments provided, wherein：Institute
State numerical simulation analysis unit to specifically include：
Data acquisition module, for obtaining the true stress-true strain curve or constitutive equation of blank tube material, and obtains institute
State the microstructure Evolution Mathematical Modeling comprising Dynamic Recrystallization corresponding to blank tube material；
Finite element analysis module, for according to the true stress-true strain curve or constitutive equation, and according to described group
Evolution Model is knitted, the numerical simulation point of pipe hot extrusion process is carried out to the hot extrusion model using limited element analysis technique
Analysis, obtain the thermo parameters method data of pipe under each group of Hot Extrusion Parameters value, the thermo parameters method data of mould,
The Grain size distribution data of hollow forging and extrusion load change over data；
Optimized criterion data capture unit, for according to the temperature field of the thermo parameters method data of the pipe, mould point
Cloth data, the Grain size distribution data of hollow forging and extrusion load change over data, obtain each group of Hot Extrusion Parameters
The optimized criterion data of the pipe under value.
With reference to second aspect, second possible embodiment of second aspect is embodiments provided, wherein：Also
Including：
Hot Extrusion Parameters alternate data signal generating unit, adjusts the value of Hot Extrusion Parameters, obtains multigroup hot extrusion
Pressure technological parameter alternate data.
With reference to second aspect, the third possible embodiment of second aspect is embodiments provided, wherein：Institute
Stating default criterion alternative condition includes：Initial melting temperature of the maximum temperature of pipe less than blank tube material；The maximum temperature of mould
Less than the softening temperature of mold materials；Extruding peak load is not higher than equipment utmost carrying ability；The crystallite dimension of hollow forging is brilliant with target
Particle size difference is less than or equal to 10 μm.
Nickel-base alloy tubing Hot Extrusion Parameters acquisition methods and device that the embodiment of the present invention is provided, to heat
Extrusion mode is carried out after the numerical simulation analysis of pipe hot extrusion process, respectively obtains the corresponding heat of three Hot Extrusion Parameters
The optimized criterion data of the pipe under extrusion process parameters alternate data, further according to the optimized criterion data, build each heat
Curved line relation between extrusion process parameters and optimized criterion data, and according to the relation curve and default criterion threshold
Value, determine the interval of the Hot Extrusion Parameters corresponding to each optimized criterion data, then again to it is all optimization sentence
Common factor process is carried out according to the interval of the same Hot Extrusion Parameters corresponding to data, Hot Extrusion Parameters are obtained
It is preferred that value.In this process, it is comprehensive three technological parameters to be carried out preferably using four kinds of optimized criterion data, Neng Gouzhen
Kinds of processes parameter to nickel-base alloy tubing in hot extrusion process is more accurately obtained, and actual production is carried out more
Plus effectively instruct.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Description of the drawings
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be attached to what is used needed for embodiment
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, thus be not construed as it is right
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can be with according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 shows a kind of nickel-base alloy tubing Hot Extrusion Parameters acquisition methods that the embodiment of the present invention is provided
Flow chart；
Fig. 2 shows another kind of nickel-base alloy tubing Hot Extrusion Parameters acquisition methods that the embodiment of the present invention is provided
Flow chart；
Fig. 3 shows a kind of nickel-base alloy tubing Hot Extrusion Parameters acquisition methods that the embodiment of the present invention is provided
In, the numerical simulation analysis of pipe hot extrusion process are carried out to hot extrusion model, obtain multigroup different Hot Extrusion Parameters and take
The flow chart of the concrete grammar of the optimized criterion data of the pipe under value；
Fig. 4 shows the concrete of the nickel-base alloy tubing Hot Extrusion Parameters acquisition methods that the embodiment of the present invention is provided
In embodiment one, the equilbrium phase diagram of In740H alloys；
Fig. 5 shows the concrete of the nickel-base alloy tubing Hot Extrusion Parameters acquisition methods that the embodiment of the present invention is provided
Relation curve in embodiment one, between the maximum temperature and hot extrusion speed of pipe；
Fig. 6 shows the concrete of the nickel-base alloy tubing Hot Extrusion Parameters acquisition methods that the embodiment of the present invention is provided
Relation curve in embodiment one, between the maximum temperature and hot extrusion speed of mould；
Fig. 7 shows the concrete of the nickel-base alloy tubing Hot Extrusion Parameters acquisition methods that the embodiment of the present invention is provided
Relation curve in embodiment one, between extrusion load peak value and hot extrusion speed；
Fig. 8 shows the concrete of the nickel-base alloy tubing Hot Extrusion Parameters acquisition methods that the embodiment of the present invention is provided
Relation curve in embodiment one, between the crystallite dimension and hot extrusion speed of hollow forging；
Fig. 9 shows the concrete of the nickel-base alloy tubing Hot Extrusion Parameters acquisition methods that the embodiment of the present invention is provided
Microgram in embodiment one, at the radius of hollow forging cross section 1/2；
Figure 10 shows a kind of nickel-base alloy tubing Hot Extrusion Parameters acquisition device that the embodiment of the present invention is provided
Structural representation；
Figure 11 shows in the nickel-base alloy tubing Hot Extrusion Parameters acquisition device that the embodiment of the present invention is provided, counts
The concrete structure schematic diagram of value sunykatuib analysis unit；
Figure 12 shows that another kind of nickel-base alloy tubing Hot Extrusion Parameters that the embodiment of the present invention is provided obtain dress
The structural representation put；
Figure 13 shows a kind of nickel-base alloy tubing Hot Extrusion Parameters acquisition methods that the embodiment of the present invention is provided
In, the structural representation of constructed hot extrusion model.
Specific embodiment
To make purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
Middle accompanying drawing, is clearly and completely described to the technical scheme in the embodiment of the present invention, it is clear that described embodiment is only
It is a part of embodiment of the invention, rather than the embodiment of whole.The present invention generally described and illustrated in accompanying drawing herein is real
Applying the component of example can be arranged and be designed with a variety of configurations.Therefore, it is of the invention to what is provided in the accompanying drawings below
The detailed description of embodiment is not intended to limit the scope of claimed invention, but is merely representative of the selected reality of the present invention
Apply example.Based on embodiments of the invention, the institute that those skilled in the art are obtained on the premise of creative work is not made
There is other embodiment, belong to the scope of protection of the invention.
At present hot extrusion hollow forging quality depends on the optimization of squeezing parameter, the core process ginseng of nickel-base alloy tubing hot extrusion
Number mainly includes：Extrusion speed, pipe preheating temperature and extrusion ratio.Every kind of squeezing parameter hot extrusion hollow forging quality is respectively provided with compared with
Exist between big impact, and each technological parameter and interact.Tubing hot extrusion parameter is optimized by method for numerical simulation
Research does not carry out comprehensive analysis mainly for single or part hollow forging quality problems to produced problem in actual production.By
There is interrelated and restriction in all kinds of quality problems, be directed to the material behaviors such as deformation, temperature rise and phase transformation, so the portion of being directed to
Point quality problems and it is preferred that the process parameters range for going out is broad, it is impossible to actual production is effectively instructed.Based on this, this
A kind of nickel-base alloy tubing Hot Extrusion Parameters acquisition methods, device and system that application is provided, can be directed to Ni-based conjunction
Technological parameter of the golden tubing in hot extrusion process is more accurately obtained, and to actual production significantly more efficient finger is carried out
Lead.
For ease of understanding the present embodiment, first to a kind of nickel-base alloy tubing heat disclosed in the embodiment of the present invention
Extrusion process parameters acquisition methods describe in detail.
It is shown in Figure 1, the nickel-base alloy tubing Hot Extrusion Parameters acquisition methods that the embodiment of the present invention is provided, tool
Body includes：
S101：The numerical simulation analysis of pipe hot extrusion process are carried out to hot extrusion model, multigroup different hot extrusions are obtained
The optimized criterion data of the pipe under technological parameter pre-value；The Hot Extrusion Parameters include：Hot extrusion speed, pipe preheating
Temperature and hot extrusion ratio；The optimized criterion data include：In extruding overall process in the maximum temperature of pipe, extruding overall process
The crystallite dimension of the maximum temperature, extrusion load peak value and hollow forging of mould.
In nickel-base alloy tubing hot extrusion process, it may appear that such as hollow forging cannot be extruded, waste pipe surface and inside occur
The problems such as crackle, hollow forging grain size not up to standard, and inventor has found, causing the factor of these problems can be summarized as follows：Cause
The immediate cause that hollow forging cannot be extruded is that extrusion load exceedes equipment utmost carrying ability, and extrusion load is excessive can be by high extruding speed
Degree, low pipe preheating temperature and aximal deformation value (large extrusion ratio) cause, or because extrusion speed causes slowly pipe excessively to drop excessively
Temperature and make resistance of deformation raise and cause；Waste pipe surface and the immediate cause of underbead crack is caused to meet or exceed for blank temperature
, there is the liquid phase of non-plastic in pipe local in the initial melting temperature of alloy, and blank temperature is too high can, preheating temperature too fast by extrusion speed
Spend height or deflection is excessive causes；Cause hollow forging grain size immediate cause not up to standard for the recrystal grain in extrusion process
Size is not inconsistent with target grain size, and recrystallization crystal particle dimension is relevant with deformed area strain rate, temperature and deflection, and by extruding
Speed, preheating temperature and extrusion ratio are determined.It follows that the Hot Extrusion Parameters of the nickel-based alloy pipe stone heart should include：
Hot extrusion speed, pipe preheating temperature and hot extrusion ratio.The present invention will finally obtain taking for these three Hot Extrusion Parameters
Value.Wherein, hot extrusion speed is：Extruder promotes the movement velocity of pipe；Extrusion ratio is pipe face area and waste end surfaces
The ratio of area.
When implementing, hot extrusion model is according to the actual size of pipe, wants the hollow forging of hot extrusion molding
What actual size built.Referring specifically to shown in Figure 13, wherein, region 1 for pipe tube wall, region 2 is for carrying out to pipe
The equipment of hot extrusion, region 3 is recipient, and region 4 is used to support the supporting member of pipe to be arranged on the through hole in the middle of pipe,
Region 5 is glass isolator, and region 6 is extrusion die.Formed in the middle part of extrusion die and squeezing for hollow forging is formed by hot extrusion for pipe
Pressure space.
After the numerical simulation analysis of pipe hot extrusion process are carried out to the hot extrusion model, multigroup different heat can be obtained
The optimized criterion data of the pipe under extrusion process parameters alternate data, join according to these optimized criterion data and hot extrusion technique
Relation between number, obtains the final value of Hot Extrusion Parameters.
Specifically, it is shown in Figure 2, hot extrusion model is carried out pipe hot extrusion process numerical simulation analysis it
Before, also include：
S201：The value of adjustment Hot Extrusion Parameters, obtains multigroup Hot Extrusion Parameters alternate data.
Specifically include the following two kinds method：
1st, the span of Hot Extrusion Parameters is determined；
It is successively definite value parameter with a parameter in Hot Extrusion Parameters to become value parameter, two other parameter, adjusts
The value of the Hot Extrusion Parameters corresponding to whole change value parameter, obtains the multigroup hot extrusion corresponding to the Hot Extrusion Parameters
Technological parameter alternate data；Wherein, the value of the Hot Extrusion Parameters corresponding to definite value parameter is in its span.
Finally, respectively three hot extrusion works finally can respectively be determined with three Hot Extrusion Parameters to become value parameter
Multigroup Hot Extrusion Parameters alternate data corresponding to skill parameter.
Wherein, the span of Hot Extrusion Parameters can be estimated according to the conventional value of parameter in daily production
Arrive.
For example, in three Hot Extrusion Parameters, the span of hot extrusion speed is 150-230mm/s, and pipe is pre-
The span of hot temperature is 1000-1500 DEG C, and the span of hot extrusion ratio is 3-10.
With hot extrusion speed to become value parameter, with pipe preheating temperature and hot extrusion ratio as definite value parameter, pipe is preheated
Temperature and hot extrusion are than value respectively：1200 DEG C and 5, adjust the value of hot extrusion speed so as to respectively：25、50、75、
100th, 125,150,175,200,225,250 (mm/s), then, finally it is obtained in that the corresponding multigroup hot extrusion of hot extrusion speed
Technological parameter alternate data is：
(25mm/s, 1200 DEG C, 5), (50mm/s, 1200 DEG C, 5), (75mm/s, 1200 DEG C, 5), (100mm/s, 1200
DEG C, 5) ..., (250mm/s, 1200 DEG C, 5).
Then, it is right with hot extrusion speed and hot extrusion ratio as definite value parameter then using pipe preheating temperature as value parameter is become
The value of hot extrusion speed and hot extrusion ratio is respectively：160mm/s and 5, adjusts the value of pipe preheating temperature so as to respectively
For：600th, 700,800,900,1000,1100,1200,1300,1400,1500,1600 (DEG C), then finally can be managed
The corresponding multigroup Hot Extrusion Parameters alternate data of base preheating temperature is：
(160mm/s, 600 DEG C, 5), (160mm/s, 700 DEG C, 5), (160mm/s, 800 DEG C, 5) ..., (160mm/s,
1600 DEG C, 5).
Finally, then with hot extrusion it is used for becoming value parameter, it is right with hot extrusion speed and pipe preheating temperature as definite value parameter
The value of hot extrusion speed and pipe preheating temperature is respectively：160mm/s and 1200 DEG C, adjust the value of hot extrusion ratio so as to
Respectively：2、2.5、3、3.5、4、4.5、5、5.5、6、6.5、7、7.5、8、8.5、9、9.5、10.So can finally obtain heat
The corresponding multigroup Hot Extrusion Parameters alternate data of extrusion ratio is：
(160mm/s, 1200 DEG C, 2), (160mm/s, 1200 DEG C, 2.5), (160mm/s, 1200 DEG C, 3), (160mm/s,
1200 DEG C, 3.5) ..., (160mm/s, 1200 DEG C, 10).
It will be appreciated by those skilled in the art that, above-mentioned example is obtained just to explanation Hot Extrusion Parameters alternate data
The mode of obtaining, and any constraint is not done to the value of Hot Extrusion Parameters alternate data during realization, during practical operation, pin
To different Ni-based tubing, the value of Hot Extrusion Parameters alternate data has various.
2nd, the span of Hot Extrusion Parameters is determined；Assume that Hot Extrusion Parameters include：First parameter, the second ginseng
Number and the 3rd parameter,
With the first parameter to become value parameter, with the second parameter and the 3rd parameter as definite value parameter, taking for the first parameter is adjusted
Value, obtains the multigroup Hot Extrusion Parameters alternate data corresponding to the first parameter；Wherein, the second ginseng corresponding to definite value parameter
The value of number and the 3rd parameter is in its span.
For the Hot Extrusion Parameters alternate data corresponding to first parameter, pipe hot extrusion process is carried out respectively
Numerical simulation analysis, can finally obtain the preferred value of first parameter.
It is again definite value with the second parameter in Hot Extrusion Parameters to become value parameter, remaining first parameter and the 3rd parameter
Parameter, then adjusts the value of the second parameter, obtains the multigroup Hot Extrusion Parameters alternate data corresponding to second parameter；
Wherein, the value of the first parameter is its preferred value, and the value of the second parameter is in its span.It should be noted that excellent
Selected value is typically a value range, and when the first parameter is as definite value, its value is within the range.
For the Hot Extrusion Parameters alternate data corresponding to second parameter, pipe hot extrusion process is carried out respectively
Numerical simulation analysis, can finally obtain the preferred value of second parameter.
It is again definite value with the 3rd parameter in Hot Extrusion Parameters to become value parameter, remaining first parameter and the second parameter
Parameter, then adjusts the value of the 3rd parameter, obtains the multigroup Hot Extrusion Parameters alternate data corresponding to the 3rd parameter；
Wherein, the value of the first parameter and the second parameter is its preferred value.It should be noted that the preferred value of the first parameter and
The preferred value of the second parameter is typically each value range, when the first parameter and the second parameter are as definite value, its value scope it
Inside selected.
For example, in three Hot Extrusion Parameters, the span of hot extrusion speed is 150-230mm/s, and pipe is pre-
The span of hot temperature is 1000-1500 DEG C, and the span of hot extrusion ratio is 3-10.
With hot extrusion speed to become value parameter, with pipe preheating temperature and hot extrusion ratio as definite value parameter, pipe is preheated
Temperature and hot extrusion are than value respectively：1200 DEG C and 5, adjust the value of hot extrusion speed so as to respectively：25、50、75、
100th, 125,150,175,200,225,250 (mm/s), then, finally it is obtained in that the corresponding multigroup hot extrusion of hot extrusion speed
Technological parameter alternate data is：
(25mm/s, 1200 DEG C, 5), (50mm/s, 1200 DEG C, 5), (75mm/s, 1200 DEG C, 5), (100mm/s, 1200
DEG C, 5) ..., (250mm/s, 1200 DEG C, 5).
Multigroup Hot Extrusion Parameters alternate data corresponding to above-mentioned hot extrusion speed carries out respectively pipe hot extrusion and presses through
The numerical simulation analysis of journey, can finally obtain the preferred value of the hot extrusion speed parameter, it is assumed that it is 67.0mm/s-
133.6mm/s。
Then, it is right with hot extrusion speed and hot extrusion ratio as definite value parameter then using pipe preheating temperature as value parameter is become
The value of hot extrusion speed and hot extrusion ratio is respectively：100mm/s and 5, adjusts the value of pipe preheating temperature so as to respectively
For：600th, 700,800,900,1000,1100,1200,1300,1400,1500,1600 (DEG C), then finally can be managed
The corresponding multigroup Hot Extrusion Parameters alternate data of base preheating temperature is：
(100mm/s, 600 DEG C, 5), (100mm/s, 700 DEG C, 5), (100mm/s, 800 DEG C, 5) ..., (100mm/s,
1600 DEG C, 5).
Carry out pipe heat respectively to the multigroup Hot Extrusion Parameters alternate data corresponding to above-mentioned heat pipe base preheating temperature
The numerical simulation analysis of extrusion process, can finally obtain the preferred value of the pipe preheating temperature parameter, it is assumed that it is 1130
～1170 DEG C.
Finally, then with hot extrusion it is used for becoming value parameter, it is right with hot extrusion speed and pipe preheating temperature as definite value parameter
The value of hot extrusion speed and pipe preheating temperature is respectively：100mm/s and 1150 DEG C, adjust the value of hot extrusion ratio so as to
Respectively：2、2.5、3、3.5、4、4.5、5、5.5、6、6.5、7、7.5、8、8.5、9、9.5、10.So can finally obtain heat
The corresponding multigroup Hot Extrusion Parameters alternate data of extrusion ratio is：
(100mm/s, 1150 DEG C, 2), (100mm/s, 1150 DEG C, 2.5), (100mm/s, 1150 DEG C, 3), (100mm/s,
1150 DEG C, 3.5) ..., (100mm/s, 1150 DEG C, 10).
It will be appreciated by those skilled in the art that, above-mentioned example is obtained just to explanation Hot Extrusion Parameters alternate data
The mode of obtaining, and any constraint is not done to the value of Hot Extrusion Parameters alternate data during realization, during practical operation, pin
To different Ni-based tubing, the value of Hot Extrusion Parameters alternate data has various.
In addition, shown in Figure 3, the embodiment of the present invention is also provided and a kind of carries out pipe hot extrusion process to hot extrusion model
Numerical simulation analysis, obtain the concrete side of the optimized criterion data of pipe under multigroup different Hot Extrusion Parameters values
Method, including：
S301：The true stress-true strain curve or constitutive equation of blank tube material are obtained, and obtains the blank tube material institute
The corresponding microstructure Evolution Mathematical Modeling comprising Dynamic Recrystallization；
When implementing, true stress-true strain curve can obtain experiment sample using being drawn materials on pipe
Product, then carry out high temperature compressed experiment and obtain for laboratory sample.Have corresponding between constitutive equation and true stress-true strain curve
Transforming relationship, therefore, as long as true stress-true strain curve can be obtained, it is possible to which it is converted into into constitutive equation.Therefore,
As long as true stress-true strain curve or constitutive equation obtain one of which.Then blank tube material is directed to, it is set up and is included
The microstructure Evolution Mathematical Modeling of Dynamic Recrystallization.Wherein, the temperature span of high temperature compressed experiment be 0.7Tm～
0.9Tm (Tm is alloy melting point), strain rate scope is 0.1s-1～10s-1.
S302：According to the true stress-true strain curve or the constitutive equation, and according to the microstructure Evolution mathematics
Model, using limited element analysis technique the numerical simulation analysis of pipe hot extrusion process are carried out to the hot extrusion model, are obtained many
The thermo parameters method data of the pipe under the different Hot Extrusion Parameters values of group, the thermo parameters method data of mould, hollow forging
Grain size distribution data and extrusion load change over data.
When implementing, limited element analysis technique also needs to be input into other parameters, for example recipient, glass isolator,
Overall coefficient of friction with pipe of extrusion die etc., because these not affect the principal element of hollow forging quality, and in reality
During, these parameters are typically all the value for determining, therefore, when numerical simulation analysis are carried out, directly input these ginsengs
Number.When the numerical simulation analysis of pipe hot extrusion process are carried out to hot extrusion model using limited element analysis technique,
It is discrete that hot extrusion model carries out gridding using quadrilateral units.And specifically when finite element analysis is carried out, can be direct
Carry out in finite element software.
S303：The thermo parameters method data of thermo parameters method data, mould according to the pipe, the grain size of hollow forging point
Cloth data and extrusion load change over data, obtain the optimization number of the pipe under each group of Hot Extrusion Parameters value
According to criteria data.
When implementing, each group of hot extrusion technique data, all to having thermo parameters method data, the temperature of mould
Degree field distribution data, the Grain size distribution data of hollow forging and extrusion load change over data, in thermo parameters method data, most
High Temperature numerical as extrudes the maximum temperature of pipe in overall process；In mold temperature field distribution data, highest temperature number
The maximum temperature of mould in value as extruding overall process；By the grain size number evidence of predeterminated position on hollow forging, as the crystal grain of hollow forging
Size, the predeterminated position can specifically be set according to actual needs, for example, by hot extrusion hollow forging (non-end) 1/2 wall
Crystallite dimension of the crystallite dimension at thickness as hollow forging；The time dependent peak value of extrusion load, as extrusion load peak
Value.
Finally, each group of hot extrusion technique data, can obtain one group of corresponding optimized criterion data.
S102：The relation curve between each Hot Extrusion Parameters and optimized criterion data is built, and according to described
Relation curve and default criterion alternative condition, determine Hot Extrusion Parameters corresponding to each optimized criterion data
Interval.
S103：The interval of the same Hot Extrusion Parameters corresponding to all optimized criterion data is occured simultaneously
Process, obtain the preferred value of Hot Extrusion Parameters.
When implementing, due to the value in adjustment Hot Extrusion Parameters, multigroup hot extrusion technique ginseng is obtained
When number alternate data, be using one of parameter as value parameter is become, it is right using other two parameters as definite value parameter
The value for becoming value parameter is adjusted, and finally respectively obtains Hot Extrusion Parameters alternate data corresponding to three parameters,
Therefore, become value parameter and often take a value, it becomes possible to obtain one group of optimization data criterion, the change value parameter has corresponded to how many groups of hot extrusions
Pressure technological parameter alternate data, then can just obtain how many groups of optimized criterion data, then can respectively build the variate ginseng
Relation curve between number and optimized criterion data.In the relation curve, using default criterion threshold value as discrimination standard, can
To determine the interval of the Hot Extrusion Parameters corresponding to each optimized criterion data, due to optimizing data four are included
Kind, then the interval of each Hot Extrusion Parameters just has respectively four determined by final, then each hot extrusion
Four intervals of pressure technological parameter carry out common factor process, and the interval for finally giving is exactly Hot Extrusion Parameters
It is preferred that value.
Wherein, default alternative condition includes：Initial melting temperature of the maximum temperature of pipe less than blank tube material；Mould is most
Softening temperature of the high-temperature less than mold materials；Extruding peak load is not higher than equipment utmost carrying ability；The crystallite dimension of hollow forging with
Target crystallite dimension difference is less than or equal to 10 μm.
, wherein it is desired to it is noted that the equipment utmost carrying ability not real utmost carrying ability of equipment, but pass through safety conversion
Afterwards, the resulting safe bearing load limit.
In addition, when concrete execution, the initial melting temperature of pipe alloy is obtained by thermodynamic phase calculation, and described sets
Standby utmost carrying ability determines by physical device operating mode, the hot-extrusion mold of described mold materials softening temperature to commonly use at present
Material H13 hot die steels are defined, and softening temperature is 650 DEG C, and described target crystallite dimension is determined by tubing purposes.
In the nickel-base alloy tubing Hot Extrusion Parameters acquisition methods that the embodiment of the present invention is provided, to hot extruding die
Type is carried out after the numerical simulation analysis of pipe hot extrusion process, respectively obtains the corresponding hot extrusion work of three Hot Extrusion Parameters
The optimized criterion data of the pipe under skill parameter alternate data, further according to the optimized criterion data, build each hot extrusion work
Curved line relation between skill parameter and optimized criterion data, and according to the relation curve and default criterion threshold value, it is determined that
The interval of the Hot Extrusion Parameters corresponding to each optimized criterion data, then again to all optimized criterion data institutes
The interval of corresponding same Hot Extrusion Parameters carries out common factor process, obtains preferably taking for Hot Extrusion Parameters
Value.In this process, it is comprehensive that three technological parameters are carried out preferably, to be directed to Ni-based using four kinds of optimized criterion data
Kinds of processes parameter of the alloy pipe in hot extrusion process is more accurately obtained, and actual production is carried out more efficient
Guidance.
Embodiment one：
This example adopts the preferred nickel base superalloy In740H alloy pipe Hot Extrusion Parameters of method for numerical simulation.
The chemical composition percentage by weight of the high temperature alloy In740H described in the present embodiment be C≤0.05%, Cr：
23～26%, Co：19%～21%, Mo：0.4～0.7%, Fe≤1.0%, Al：0.8～1.6%, Ti：1.0～2.0%,
Nb：1.0～2.0%, Ni：Surplus.
According to purpose of the present invention and operation principle, concrete technical scheme is：
High temperature hot pressing contracting laboratory sample is taken from 1/2 radius of In740H alloys forging rod, is processed into Φ 8 × 12mm cylinders,
High temperature compressed experiment is carried out on Gleeble hot modeling test machines, hot compression temperature select 1000 DEG C, 1050 DEG C, 1100 DEG C and
1150 DEG C, strain rate selects 0.1s-1,1s-1 and 10s-1, compresses true strain amount for 0.16,0.35,0.7 and 0.9, totally 48 groups
Deformation condition, obtains rheological curve, constitutive equation and the microstructure Evolution Mathematical Modeling comprising dynamic recrystallization of alloy.
FEM model is set up in business software Deform according to In740H alloy pipes actual size, schematic diagram is as schemed
Shown in 13.Tube blank size external diameter Φ 218mm, internal diameter Φ 70mm, length 610mm, each part is entered using quadrilateral units in model
Row gridding is discrete.
Numerical simulation is carried out to In740H alloy pipes hot extrusion process, obtains extruding the temperature of overall process pipe and mould
The grain size distribution and extrusion load versus time curve of hollow forging at the end of distribution, dependent variable distribution, the extruding of pipe,
And therefrom determine the concrete value of process parameter optimizing criterion in this simulation process, i.e. pipe maximum temperature, the mould highest temperature
Crystallite dimension at degree, extrusion load peak value and hot extrusion hollow forging (non-end) 1/2 wall thickness.
Change extrusion process parameters value (including：Extrusion speed, pipe preheating temperature and extrusion ratio), to every kind of technique
Parameter combination carries out a numerical simulation, and when a kind of technological parameter value is changed, other specification keeps constant.
It is determined that the optimized criterion value during numerical simulation calculation each time, and draw with lower curve：With extrusion speed
For abscissa, curve is drawn by ordinate of the pipe maximum temperature under different extrusion speeds, draw according to same method and extrude
Speed-mould maximum temperature curve, extrusion speed-extrusion load peak curve, the crystallite dimension at the wall thickness of extrusion speed -1/2
Curve.Other two kinds of extrusion process parameters --- the homologous thread of pipe preheating temperature and extrusion ratio is adopted and extrusion speed phase
Same method, amounts to and draws 12 curves.
The equilbrium phase diagram of In740H alloys is calculated using thermodynamics phasor software, the initial melting temperature for determining alloy is 1300 DEG C
(Fig. 4) softening temperature for, determining hot-extrusion mold material H13 hot die steels is 650 DEG C, it is determined that the carrying of actual extrusion equipment
The limit is 3800 tons (38MN), and the target crystallite dimension for determining In740H alloy hot extrusion hollow forgings is 55 μm.
Every kind of extrusion process parameters are carried out preferably using above-mentioned standard：Pipe maximum temperature is not higher than closed in extrusion process
The initial melting temperature (1300 DEG C) of gold, mould maximum temperature is not higher than the softening temperature (650 DEG C) of mold materials, extrusion load peak value
The not higher than utmost carrying ability of equipment, the crystallite dimension at the wall thickness of hollow forging 1/2 is more or less the same in 10 μm with desired value；
Determine that every kind of technological parameter makes all optimized criterions meet the span of standard, and friendship is taken to four kinds of spans
Collection, and then Optimizing Process Parameters.It is concrete as shown in Fig. 5-Fig. 9 by taking extrusion speed as an example：The chosen candidate value of extrusion speed be 25,50,
75th, 100,125,150 and 200mm/s, numerical simulation result shows when extrusion speed is less than 133.6mm/s, the pipe highest temperature
Degree is less than 1300 DEG C of In740 alloys initial melting temperature (Fig. 5)；When extrusion speed is less than 191.1mm/s, mould maximum temperature is less than
650 DEG C of mould softening temperature (Fig. 6)；Under all alternative extrusion speeds, extruding peak load is below equipment utmost carrying ability
38MN (Fig. 7)；Crystallite dimension and target when extrusion speed is in 67.0mm/s～161.6mm/s scopes, at the wall thickness of hollow forging 1/2
The difference of crystallite dimension is not more than 10 μm (Fig. 8).Above preferred scope is overlapped, taking common factor can obtain In740H alloy pipes
The preferred scope of extrusion speed is 67.0mm/s～133.6mm/s in hot extrusion process.
Other technological parameters are carried out preferably using same procedure, while the pipe for making four optimized criterions meet standard is pre-
Hot temperature range is 1130～1170 DEG C, and extrusion ratio is less than 7.2.
Hot extrusion trial-production is carried out to In740H alloy pipes on 6000 tons of extruders, to verify optimizing technology parameters just
True property.Trial-production tube blank size is external diameter Φ 218mm, internal diameter Φ 70mm, and length 610mm, waste pipe size is external diameter Φ 105mm, interior
Footpath Φ 61mm, are computed extrusion ratio for 5.8.Combined process parameter preferred scope, selectes extrusion speed 100mm/s, pipe preheating
1160 DEG C of temperature.Smoothly, the hollow forging surface quality that extruding is obtained after terminating is high, without underbead crack, cross section for whole extrusion process
Crystallite dimension at 1/2 radius is 61 μm (Fig. 9).
Embodiment two：
This example adopts the preferred abros In690 alloy pipe Hot Extrusion Parameters of method for numerical simulation.
The chemical composition percentage by weight of the corrosion resistant alloy In690 described in the present embodiment be C≤0.05%, Cr：
27～31%, Fe：7%～1.0%, Si≤0.5%, Cu≤0.5%, Ni：Surplus.
According to purpose of the present invention and operation principle, concrete technical scheme is：
High temperature hot pressing contracting laboratory sample is taken from 1/2 radius of In690 alloys forging rod, is processed into Φ 8 × 12mm cylinders, high
Warm compression experiment is carried out on Gleeble hot modeling test machines, hot compression temperature select 1050 DEG C, 1100 DEG C, 1150 DEG C and
1200 DEG C, strain rate selects 0.1s-1,1s-1 and 10s-1, compresses true strain amount for 0.16,0.35,0.7 and 0.9, totally 48 groups
Deformation condition, obtains rheological curve, constitutive equation and the microstructure Evolution Mathematical Modeling comprising dynamic recrystallization of alloy.
FEM model is set up in business software Deform according to In690 alloy pipes actual size.Outside tube blank size
Footpath Φ 204mm, internal diameter Φ 77.5mm, length 600mm, to carry out gridding using quadrilateral units discrete for each part in model.
Numerical simulation is carried out to In690 alloy pipes hot extrusion process, obtains extruding the temperature of overall process pipe and mould
The grain size distribution and extrusion load versus time curve of hollow forging at the end of distribution, dependent variable distribution, the extruding of pipe,
And therefrom determine the concrete value of process parameter optimizing criterion in this simulation process, i.e. pipe maximum temperature, the mould highest temperature
Crystallite dimension at degree, extrusion load peak value and hot extrusion hollow forging (non-end) 1/2 wall thickness.
Change extrusion process parameters value (including：Extrusion speed, pipe preheating temperature and extrusion ratio), to every kind of technique
Parameter combination carries out a numerical simulation, and when a kind of technological parameter value is changed, other specification keeps constant.
It is determined that the optimized criterion value during numerical simulation calculation each time, and draw with lower curve：With extrusion speed
For abscissa, curve is drawn by ordinate of the pipe maximum temperature under different extrusion speeds, draw according to same method and extrude
Speed-mould maximum temperature curve, extrusion speed-extrusion load peak curve, the crystallite dimension at the wall thickness of extrusion speed -1/2
Curve.Other two kinds of extrusion process parameters --- the homologous thread of pipe preheating temperature and extrusion ratio is using identical with extrusion speed
Method, amount to draw 12 curves.
The equilbrium phase diagram of In690 alloys is calculated using thermodynamics phasor software, the initial melting temperature for determining alloy is 1387 DEG C,
The softening temperature for determining hot-extrusion mold material H13 hot die steels is 650 DEG C, it is determined that the utmost carrying ability of actual extrusion equipment is
3500 tons (35MN), the target crystallite dimension for determining In690 alloy hot extrusion hollow forgings is 65 μm.
Every kind of extrusion process parameters are carried out preferably using above-mentioned standard：Pipe maximum temperature is not higher than closed in extrusion process
The initial melting temperature (1387 DEG C) of gold, mould maximum temperature is not higher than the softening temperature (650 DEG C) of mold materials, extrusion load peak value
The not higher than load limitation (35MN) of equipment, the crystallite dimension at the wall thickness of hollow forging 1/2 is more or less the same in 10 μm with desired value；
Determine that every kind of technological parameter makes all optimized criterions meet the span of standard, and friendship is taken to four spans
Collection, and then Optimizing Process Parameters.Detailed process is same as Example 1, through preferably obtaining the excellent of In690 alloy pipe hot extrusions
The extrusion speed scope is selected to be：183.5mm/s～277.0mm/s, pipe preheating temperature scope is：1183 DEG C～1251 DEG C, extruding
It is than scope：8.8～17.4.
Hot extrusion trial-production is carried out to In690 alloy pipes on 3500 tons of extruders, to verify optimizing technology parameters just
True property.Trial-production tube blank size is external diameter Φ 204mm, internal diameter Φ 77.5mm, and length 600mm, waste pipe size is external diameter Φ 87.5mm,
Internal diameter Φ 72.5mm, are computed extrusion ratio for 14.8.Combined process parameter preferred scope, selectes extrusion speed 200mm/s, pipe
1200 DEG C of preheating temperature.Smoothly, the hollow forging surface quality that extruding is obtained after terminating is high for whole extrusion process, horizontal without underbead crack
Crystallite dimension at the radius of section 1/2 is 70 μm.
Further embodiment of this invention also provides a kind of nickel-base alloy tubing Hot Extrusion Parameters acquisition device, referring to Figure 10
Shown, the device includes：
Numerical simulation analysis unit, for carrying out the numerical simulation analysis of pipe hot extrusion process to hot extrusion model, obtains
Take the optimized criterion data of the pipe under multigroup different Hot Extrusion Parameters alternate datas；The Hot Extrusion Parameters bag
Include：Hot extrusion speed, pipe preheating temperature and hot extrusion ratio；The optimized criterion data include：Pipe in extruding overall process
Maximum temperature, extruding overall process in mould maximum temperature, extrusion load peak value and hollow forging crystallite dimension；
Relation curve member unit, for building the relation between each Hot Extrusion Parameters and optimized criterion data
Curve,
Interval determining unit, for according to the relation curve and default criterion alternative condition, determining each
Plant the interval of the Hot Extrusion Parameters corresponding to optimized criterion data；
It is preferred that value acquiring unit, for the same Hot Extrusion Parameters corresponding to all optimized criterion data
Interval carries out common factor process, obtains the preferred value of Hot Extrusion Parameters.
In the present embodiment, numerical simulation analysis unit, relation curve member unit, interval determining unit and preferably take
The concrete function and interactive mode of value acquiring unit, can be found in the record of the corresponding embodiments of Fig. 1, will not be described here.
In the nickel-base alloy tubing Hot Extrusion Parameters acquisition device that the embodiment of the present invention is provided, to hot extruding die
Type is carried out after the numerical simulation analysis of pipe hot extrusion process, respectively obtains the corresponding hot extrusion work of three Hot Extrusion Parameters
The optimized criterion data of the pipe under skill parameter alternate data, further according to the optimized criterion data, build each hot extrusion work
Curved line relation between skill parameter and optimized criterion data, and according to the relation curve and default criterion threshold value, it is determined that
The interval of the Hot Extrusion Parameters corresponding to each optimized criterion data, then again to all optimized criterion data institutes
The interval of corresponding same Hot Extrusion Parameters carries out common factor process, obtains preferably taking for Hot Extrusion Parameters
Value.In this process, it is comprehensive that three technological parameters are carried out preferably, to be directed to Ni-based using four kinds of optimized criterion data
Kinds of processes parameter of the alloy pipe in hot extrusion process is more accurately obtained, actual production is carried out more added with
The guidance of effect.
Shown in Figure 10, further embodiment of this invention also provides nickel-base alloy tubing Hot Extrusion Parameters acquisition device
In, the concrete structure of numerical simulation analysis unit, including：
Data acquisition module, for obtaining the true stress-true strain curve or constitutive equation of blank tube material, and obtains institute
State the microstructure Evolution Mathematical Modeling comprising Dynamic Recrystallization corresponding to blank tube material；
Finite element analysis module, for according to the true stress-true strain curve or constitutive equation, and according to described group
Evolution Model is knitted, the numerical simulation point of pipe hot extrusion process is carried out to the hot extrusion model using limited element analysis technique
Analysis, obtain the thermo parameters method data of pipe under each group of Hot Extrusion Parameters value, the thermo parameters method data of mould,
The Grain size distribution data of hollow forging and extrusion load change over data；
Optimized criterion data acquisition module, for according to the temperature field of the thermo parameters method data of the pipe, mould point
Cloth data, the Grain size distribution data of hollow forging and extrusion load change over data, obtain each group of Hot Extrusion Parameters
The optimized criterion data of the pipe under value.
In the present embodiment, the concrete work(of data acquisition module, finite element analysis module and optimized criterion data acquisition module
Energy and interactive mode, can be found in the record of the corresponding embodiments of Fig. 3, will not be described here.
Shown in Figure 12, further embodiment of this invention also provides another nickel-base alloy tubing Hot Extrusion Parameters
Acquisition device, also includes：Hot Extrusion Parameters alternate data signal generating unit, adjusts the value of Hot Extrusion Parameters, obtains
Multigroup Hot Extrusion Parameters alternate data.
In the present embodiment, Hot Extrusion Parameters alternate data signal generating unit concrete function and interactive mode can be found in Fig. 2
The record of corresponding embodiment, will not be described here.
In several of the above embodiments where, the default criterion alternative condition includes：The maximum temperature of pipe is less than pipe
The initial melting temperature of material；Softening temperature of the maximum temperature of mould less than mold materials；Extruding peak load is not higher than equipment and holds
Carry the limit；The crystallite dimension of hollow forging is differed less than or equal to 10 μm with target crystallite dimension.
Beneficial effect of the present invention：
(1) carrying out numerical simulation to nickel-base alloy tubing hot extrusion process can track technique overall process, be given pipe and
Mould is extruding the temperature field in each stage, strain field and Stress Field Distribution and extrusion load versus time curve, enters
And directly determine the concrete numerical value of optimized criterion.Meanwhile, the change and combination of technological parameter are row simulated implementations on computers
, save the brought cost of a large amount of actual examination extruding.
(2) the characteristics of proposition of optimized criterion fully combines nickel-base alloy in the present invention, the military service of such alloy pipe
Condition requires that it has excellent elevated temperature strength and corrosion resistance, is that this adds substantial amounts of alloying element when alloy is designed, by
This draws the technical difficult points of such tubing hot extrusion production：1) raising of alloying level can be increased by solution strengthening mechanism
The Deformation Resistance of big material, squeezing parameter select not cause at that time extrusion load make more than equipment utmost carrying ability tubing without
Method is smoothly extruded (i.e. " vexed car ")；2) low-alloyed initial melting temperature substantially drops in the membership that adds of the alloying element such as Al, Ti, due to tubing
Being squeezed in closed recipient is carried out, and pipe surface is coated with the lubricant with heat insulation effect, therefore in extrusion process
Blank occurs violent temperature rise, and this temperature rise reduces material resistance of deformation and be conducive to extruding, but if temperature rise is excessive
Can make blank local temperature exceed alloy initial melting temperature and form partial liquid phase, the region in deformation after unloading and cooling procedure into
For crack initiation point, internal and surface quality problems are caused to even result in tubing local chips；3) a large amount of additions of alloying element
Make nickel-base alloy that there is relatively low stacking fault energy, and then tend in the larger hot extrusion process of deflection with dynamic recrystallization work
Soften and crystal grain refinement mode for main, make the organization decided journey that dynamic recrystallization occurs in extrusion process of hot extrusion hollow forging
Degree and the crystallite dimension for recrystallizing, therefore of the invention acquisition by high temperature hot pressing contracting experiment includes that the tissue of dynamic recrystallization is drilled
Change Mathematical Modeling.
It follows that the present invention analyzes the essential reason of subject matter in nickel-base alloy tubing hot extrusion real process,
And its relation between actual process parameter is set up, every kind of technological parameter is entered for each practical problem by numerical simulation
Row optimization is simultaneously superimposed optimization range, is finally given while solving the preferred parameter scope of various problems.
The calculating of nickel-base alloy tubing Hot Extrusion Parameters acquisition methods and device that the embodiment of the present invention is provided
Machine program product, including the computer-readable recording medium for storing program code, the instruction that described program code includes can use
In the method described in previous methods embodiment is performed, implement and can be found in embodiment of the method, will not be described here.
Those skilled in the art can be understood that, for convenience and simplicity of description, the system of foregoing description
With the specific work process of device, the corresponding process in preceding method embodiment is may be referred to, be will not be described here.
If the function is realized and as independent production marketing or when using using in the form of SFU software functional unit, can be with
In being stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially in other words
The part contributed to prior art or the part of the technical scheme can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be individual
People's computer, server, or network equipment etc.) perform all or part of step of each embodiment methods described of the invention.
And aforesaid storage medium includes：USB flash disk, portable hard drive, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, all should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (10)
1. a kind of nickel-base alloy tubing Hot Extrusion Parameters acquisition methods, it is characterised in that include：
The numerical simulation analysis of pipe hot extrusion process are carried out to hot extrusion model, multigroup different Hot Extrusion Parameters is obtained standby
Select the optimized criterion data of the pipe under data；The Hot Extrusion Parameters include：Hot extrusion speed, pipe preheating temperature with
And hot extrusion ratio；The optimized criterion data include：Mould in the maximum temperature of pipe, extruding overall process in extruding overall process
The crystallite dimension of maximum temperature, extrusion load peak value and hollow forging；
Build the relation curve between each Hot Extrusion Parameters and optimized criterion data, and according to the relation curve with
And default criterion alternative condition, determine the interval of the Hot Extrusion Parameters corresponding to each optimized criterion data；
Common factor process is carried out to the interval of the same Hot Extrusion Parameters corresponding to all optimized criterion data, is obtained
The preferred value of Hot Extrusion Parameters.
2. method according to claim 1, it is characterised in that described that pipe hot extrusion process is carried out to hot extrusion model
Numerical simulation analysis, the optimized criterion data for obtaining the pipe under multigroup different Hot Extrusion Parameters values are specifically included：
The true stress-true strain curve or constitutive equation of blank tube material are obtained, and obtains the bag corresponding to the blank tube material
Microstructure Evolution Mathematical Modeling containing Dynamic Recrystallization；
According to the true stress-true strain curve or constitutive equation, and according to the microstructure Evolution Mathematical Modeling, using limited
Meta analysis method carries out the numerical simulation analysis of pipe hot extrusion process to the hot extrusion model, obtains each group of hot extrusion technique
The thermo parameters method data of the pipe under parameter value, the thermo parameters method data of mould, the Grain size distribution data of hollow forging and
Extrusion load changes over data；
The thermo parameters method data of thermo parameters method data, mould, the Grain size distribution data of hollow forging according to the pipe and
Extrusion load changes over data, obtains the optimized criterion data of the pipe under each group of Hot Extrusion Parameters value.
3. method according to claim 1 and 2, it is characterised in that also include：The value of adjustment Hot Extrusion Parameters,
Obtain multigroup Hot Extrusion Parameters alternate data.
4. method according to claim 3, it is characterised in that the default criterion alternative condition includes：Pipe is most
Initial melting temperature of the high-temperature less than blank tube material；Softening temperature of the maximum temperature of mould less than mold materials；Extruding peak value is carried
Lotus is not higher than equipment utmost carrying ability；The crystallite dimension of hollow forging is differed less than or equal to 10 μm with target crystallite dimension.
5. method according to claim 2, it is characterised in that the true stress-true strain curve of the acquisition blank tube material
Specifically include：
Pipe is drawn materials, laboratory sample is obtained；
High temperature compressed experiment is carried out to laboratory sample, the corresponding true stress-true strain curve of blank tube material is obtained；
Wherein, the temperature span of the high temperature compressed experiment is 0.7*Tm～0.9*Tm, and strain rate scope is 0.1s-1
～10s-1；Tm is alloy melting point.
6. method according to claim 1 and 2, it is characterised in that the preferred value of the acquisition Hot Extrusion Parameters
Afterwards, also include：
Using the preferred value, blank tube material carries out actual verification.
7. a kind of nickel-base alloy tubing Hot Extrusion Parameters acquisition device, it is characterised in that include：
Numerical simulation analysis unit, for carrying out the numerical simulation analysis of pipe hot extrusion process to hot extrusion model, obtains many
The optimized criterion data of the pipe under the different Hot Extrusion Parameters alternate datas of group；The Hot Extrusion Parameters include：Heat
Extrusion speed, pipe preheating temperature and hot extrusion ratio；The optimized criterion data include：The highest of pipe in extruding overall process
The crystallite dimension of the maximum temperature, extrusion load peak value and hollow forging of mould in temperature, extruding overall process；
Relation curve member unit, it is bent for building the relation between each Hot Extrusion Parameters and optimized criterion data
Line,
Interval determining unit, for according to the relation curve and default criterion alternative condition, determining that each is excellent
Change the interval of the Hot Extrusion Parameters corresponding to criteria data；
It is preferred that value acquiring unit, for the value to the same Hot Extrusion Parameters corresponding to all optimized criterion data
Interval carries out common factor process, obtains the preferred value of Hot Extrusion Parameters.
8. device according to claim 7, it is characterised in that the numerical simulation analysis unit is specifically included：
Data acquisition module, for obtaining the true stress-true strain curve or constitutive equation of blank tube material, and obtains the pipe
The microstructure Evolution Mathematical Modeling comprising Dynamic Recrystallization corresponding to base material；
Finite element analysis module, for according to the true stress-true strain curve or constitutive equation, and drills according to the tissue
Change Mathematical Modeling, the numerical simulation analysis of pipe hot extrusion process carried out to the hot extrusion model using limited element analysis technique,
Obtain thermo parameters method data, the thermo parameters method data of mould, the famine of the pipe under each group of Hot Extrusion Parameters value
The Grain size distribution data of pipe and extrusion load change over data；
Optimized criterion data acquisition module, for according to the thermo parameters method number of the thermo parameters method data of the pipe, mould
Data are changed over according to, Grain size distribution data of hollow forging and extrusion load, each group of Hot Extrusion Parameters value is obtained
Under pipe optimized criterion data.
9. the device according to claim 7 or 8, it is characterised in that also include：
Hot Extrusion Parameters alternate data signal generating unit, adjusts the value of Hot Extrusion Parameters, obtains multigroup hot extrusion work
Skill parameter alternate data.
10. device according to claim 9, it is characterised in that the default criterion alternative condition includes：Pipe is most
Initial melting temperature of the high-temperature less than blank tube material；Softening temperature of the maximum temperature of mould less than mold materials；Extruding peak value is carried
Lotus is not higher than equipment utmost carrying ability；The crystallite dimension of hollow forging is differed less than or equal to 10 μm with target crystallite dimension.
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| CN107096800A (en) * | 2017-06-08 | 2017-08-29 | 太原钢铁(集团)有限公司 | Nickel-base alloy hot extrusion tubing organizational controls method |
| CN108274054A (en) * | 2018-03-28 | 2018-07-13 | 西北工业大学 | A kind of antifatigue milling process parameter control method of aluminium alloy thin-walled structure |
| CN112198811A (en) * | 2020-09-09 | 2021-01-08 | 重庆邮电大学 | Extrusion forming temperature field space-time separation modeling and uniformity evaluation system and method |
| CN112906181A (en) * | 2020-12-30 | 2021-06-04 | 中国兵器工业第五九研究所 | Design method of multi-pass forming process of magnesium alloy based on fine grains |
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| CN106984661A (en) * | 2017-06-08 | 2017-07-28 | 太原钢铁(集团)有限公司 | Nickel-base alloy bar hot extrusion technique |
| CN107096800A (en) * | 2017-06-08 | 2017-08-29 | 太原钢铁(集团)有限公司 | Nickel-base alloy hot extrusion tubing organizational controls method |
| CN106984661B (en) * | 2017-06-08 | 2018-12-25 | 太原钢铁(集团)有限公司 | Nickel-base alloy bar hot extrusion technique |
| CN107096800B (en) * | 2017-06-08 | 2019-01-11 | 太原钢铁(集团)有限公司 | Nickel-base alloy hot extrusion tubing organizational controls method |
| CN108274054A (en) * | 2018-03-28 | 2018-07-13 | 西北工业大学 | A kind of antifatigue milling process parameter control method of aluminium alloy thin-walled structure |
| CN112198811A (en) * | 2020-09-09 | 2021-01-08 | 重庆邮电大学 | Extrusion forming temperature field space-time separation modeling and uniformity evaluation system and method |
| CN112906181A (en) * | 2020-12-30 | 2021-06-04 | 中国兵器工业第五九研究所 | Design method of multi-pass forming process of magnesium alloy based on fine grains |
| CN112906181B (en) * | 2020-12-30 | 2023-07-21 | 中国兵器工业第五九研究所 | Magnesium alloy multipass forming process design method based on fine grains |
| CN115841052A (en) * | 2023-02-23 | 2023-03-24 | 江苏甬金金属科技有限公司 | Stainless steel precision extrusion process optimization method and system based on numerical simulation |
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