CN109746446A - A kind of method for building up of the material gene pool based on laser microcell metallurgy - Google Patents

A kind of method for building up of the material gene pool based on laser microcell metallurgy Download PDF

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CN109746446A
CN109746446A CN201910204808.4A CN201910204808A CN109746446A CN 109746446 A CN109746446 A CN 109746446A CN 201910204808 A CN201910204808 A CN 201910204808A CN 109746446 A CN109746446 A CN 109746446A
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laser
powder
groove
microcell
feeder
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CN109746446B (en
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张凤英
胡腾腾
邱莹
王坤
王刚
艾诚
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Changan University
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Changan University
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Abstract

The invention discloses a kind of method for building up of material gene pool based on laser microcell metallurgy, comprising steps of one, building laser microcell metallurgical system;Two, it determines metal powder type and prepares all kinds of metal powders of enough quality;Three, mobile feeder;Four, it fixes mixed powder gross mass and controls all kinds of metal powders according to all kinds of metal powder mass ratioes and export;Five, the mixing and dispensing of all kinds of metal powders;Six, complete matrix on fluted interior mixed powder dispensing;Seven, setting laser occurs the laser processing parameter of subsystem and carries out microcell metallurgy;Eight, the corresponding relationship of laser gain material alloy sample ingredient and microscopic structure is established, and micro-nano impression test is carried out to laser gain material alloy sample;Nine, training BP neural network model;Ten, the foundation of laser gain material alloy sample material gene pool.High energy laser beam of the present invention pinpoints microcell melting to the mixed powder being preset in matrix upper groove, and the strong convection based on laser molten pool realizes metal material microcell alloying.

Description

A kind of method for building up of the material gene pool based on laser microcell metallurgy
Technical field
The invention belongs to laser gain material technical fields, and in particular to a kind of material gene pool based on laser microcell metallurgy Method for building up.
Background technique
Laser gain material manufacture is fast-developing with a kind of completely new manufacture, realize from it is traditional " subtract material manufacture, etc. materials The theory transformation of " increasing material manufacturing " is arrived in manufacture ".Based on powder, in such a way that high energy laser beam is by cladding, layer-by-layer heap The long-pending processing technology at entity component.Laser gain material manufacturing technology subtracts exploitation to the time to put goods on the market of product greatly It is few, and greatly reduce product development cost, can especially make the manufacture of product more rapidly, flexible, personalized, diversification, There is unrivaled advantage in new product development and Single unit job lot production.In laser gain material manufacture building course, by The non-equilibrium microstructure caused by high energy beam laser rapidly solidification characteristic and micro-sized stress are concentrated, so that laser gain material manufacture alloy Microscopic structure and performance are different from traditional processing technology, thus cannot give full play to the advantage of laser gain material manufacturing technology. Therefore, the design of laser gain material " special metals " is critical issue in the urgent need to address in laser gain material technology road for development.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that providing a kind of based on laser The method for building up of the material gene pool of microcell metallurgy makes high energy laser beam to being preset in by constructing laser microcell metallurgical system Mixed powder in matrix upper groove pinpoints microcell melting, and the strong convection based on laser molten pool realizes metal material microcell alloy Change, realize the quick preparation of polynary multicomponent metal material, the expansion of gene pool is carried out to existing alloy, realizes that laser gain material is closed The efficient design and preparation of gold, convenient for promoting the use of.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of material based on laser microcell metallurgy The method for building up of gene pool, which is characterized in that method includes the following steps:
Step 1: building laser microcell metallurgical system: matrix is horizontally arranged on experimental bench, by being base to blanking subsystem Body launches mixed powder, subsystem occurs by mixed powder microcell metallurgy into laser gain material alloy sample by laser, and matrix described is given Blanking subsystem and laser occur subsystem and constitute laser microcell metallurgical system;
Matrix is ceramic matrix, and N number of domed groove in array arrangement is offered on the ceramic matrix, described The value of radius of sphericity R where groove is 5mm~20mm, and the value of the depth h of groove isIt is two neighboring recessed The spacing of slot is 0.5cm~1cm, wherein N is the positive integer not less than 100;
It is described to blanking subsystem include powder extraction mechanism, to the powder extraction mechanism export various metals powder mixed Meal mixer and the feeder that groove is accurately thrown to the mixed metal powder progress of meal mixer output, feeder is mounted on can edge On the first mobile three freedom degree manipulator of X-axis, Y-axis and the Z-direction of rectangular coordinate system in space, meal mixer tilts down insertion It in feeder and is fixed on feeder, the powder extraction mechanism includes collection tube cell and multiple single channel vermicelli making machines, single channel vermicelli making machine It is connected to by single channel powder feeding pipe with collection tube cell, the discharge end for collecting tube cell is consistent with the feed end structure size of meal mixer, collects tube cell Discharge end connected with the feed end of meal mixer, single channel vermicelli making machine is to hold metal powder and accurate export specified test metal powder The accurate automatic conveying device of powdery starting material at end, the discharge end of meal mixer are equipped with discharging gate, and the discharging gate is funnel Shape discharging gate, the discharge end of the infundibulate discharging gate are equipped with automatic sliding door, the side wall installation of the infundibulate discharging gate Have a weighing sensor, feeder include hydrostatic column and setting the hydrostatic column bottom and with the hydrostatic column The flared vessel that processing and fabricating is integrated, the osculum end of the flared vessel are the discharge end of feeder, and feeder goes out Expect that the size at end is consistent with the open end size of groove;
The end facula area that the high energy laser beam of subsystem output occurs for laser is less than the open end area of groove, laser Subsystem occurs and is mounted on the second three freedom degree manipulator that can be moved along the X-axis, Y-axis and Z-direction of rectangular coordinate system in space On;
The automatic sliding door, first three freedom degree manipulator, second three freedom degree manipulator and laser hair Raw subsystem is controlled by computer, and the signal input part of the signal output end of the weighing sensor and the computer connects It connects;
Step 2: determining metal powder type and preparing all kinds of metal powders of enough quality: according to design of alloy Determine metal powder type, choose in powder extraction mechanism with the consistent single channel vermicelli making machine of metal powder number of species, and by each eka-gold Belong to that powder is enough respectively is added in each single channel vermicelli making machine;
Step 3: mobile feeder: utilizing the groove specified on the mobile feeder to matrix of the first three freedom degree manipulator At position, make the open end of the discharge end alignment indentation of feeder, and the open end of the discharge end of feeder and specified groove It contacts and seamless;
Step 4: fixed mixed powder gross mass and to control all kinds of metal powders according to all kinds of metal powder mass ratioes defeated simultaneously Out: according to formulaCalculate the matter of the i-th metalloid powder in the metal powder type that design of alloy determines Measure mi, wherein M is the gross mass of mixed powder, ρiFor the percentage for the mixed powder gross mass that the i-th metalloid powder accounts for, K is metal Powder sort quantity, the i-th metalloid powder are placed in i-th of single channel vermicelli making machine;
According to K metalloid powder quality ratio, computer control K metalloid powder exports simultaneously;
Step 5: the mixing and dispensing of all kinds of metal powders: metal powder is defeated by single channel powder feeding pipe in single channel vermicelli making machine Enter to collection tube cell, all kinds of metal powders collected in tube cell are input to meal mixer, mixed all kinds of metal powders in meal mixer again It is snapped down at discharging mouth position, when the gross mass of the mixed all kinds of metal powders of weighing sensor acquisition is M, computer It controls automatic sliding door to open, mixed all kinds of metal powders are thrown in feeder, and the osculum end through flared vessel is fallen Step 6 is executed after entering in specified groove;When the gross mass of the mixed all kinds of metal powders of weighing sensor acquisition differs When M, feeder is moved to outside matrix by the first three freedom degree manipulator, and computer controls automatic sliding door and opens, after mixing All kinds of metal powders be thrown in feeder, execute step 3 after the osculum end of flared vessel is fallen into returnable;
Step 6: new groove, is considered as circulation step three after specified groove by the groove more renewed, until completing matrix The dispensing of upper fluted interior mixed powder;
Step 7: setting laser occurs the laser processing parameter of subsystem and carries out microcell metallurgy: freely using the one or three Feeder is moved to outside matrix by degree manipulator, and laser generation subsystem is moved to matrix using the second three freedom degree manipulator Top is made laser that the open end of the end hot spot alignment indentation of the high energy laser beam of subsystem output occur, is occurred using laser The laser power of the high energy laser beam of subsystem setting output is 1000W~3000W, mixed powder microcell metallurgy side in each groove Formula is all the same;
Mixed powder microcell metallurgical process in any groove: it opens laser and subsystem occurs, subsystem output occurs for laser High energy laser beam melts mixed powder Fast Fixed-point in groove, and high energy laser beam acts on groove, realizes the melting zone without external carbuncle Quickly from convection current metallurgy, laser gain material alloy sample is obtained;
Step 8: establishing the corresponding relationship of laser gain material alloy sample ingredient and microscopic structure, and to laser gain material alloy Sample carries out micro-nano impression test: being scanned sight to each laser gain material alloy sample using light microscopic and scanning electron microscope It surveys, obtains the microstructural parameters of each laser gain material alloy sample, the microstructural parameters include multiple phase morphology parameters, Each phase morphology parameter includes phase length, phase width and phase volume fraction;
The microscopic structure of each composition quality and each laser gain material alloy sample for each laser gain material alloy sample Parameter establishes corresponding relationship;
Meanwhile micro-nano impression test is carried out to each laser gain material alloy sample, obtain each laser gain material alloy examination The hardness and elastic modulus of sample;
Step 9: training BP neural network model: using each composition quality of laser gain material alloy sample as BP neural network The input layer of model, using the microstructural parameters of laser gain material alloy sample, hardness and elastic modulus as BP neural network The output node layer of model, training BP neural network model;
Step 10: the foundation of laser gain material alloy sample material gene pool: with the molding laser gain material alloy of microcell melting Sample enriches laser gain material alloy sample material gene pool, and new laser gain material alloy sample is predicted using BP neural network mould Hardness and elastic modulus, realize laser gain material alloy sample material gene pool expansion.
A kind of method for building up of above-mentioned material gene pool based on laser microcell metallurgy, it is characterised in that: the metal Powder is elemental metals powder or intermediate alloy powder, and the partial size of the metal powder is 45 μm~150 μm.
A kind of method for building up of above-mentioned material gene pool based on laser microcell metallurgy, it is characterised in that: the mixed powder Device tilts down 45 ° and is inserted into feeder.
A kind of method for building up of above-mentioned material gene pool based on laser microcell metallurgy, it is characterised in that: the mixing Powder is located at the depth that the height in groove is not higher than groove.
The method for building up of above-mentioned a kind of material gene pool based on laser microcell metallurgy, it is characterised in that: in step 8 It is described that tissue observation is carried out to a series of laser gain material alloy sample of heterogeneities using light microscopic and scanning electron microscope, then lead to It crosses Image-Plus software the microstructural parameters of each laser gain material alloy sample are characterized and extracted.
Compared with the prior art, the present invention has the following advantages:
1, the present invention uses ceramic matrix, avoids sending out with after metal molten by building laser microcell metallurgical system, matrix Raw wetting action, and multiple grooves are opened up on matrix, mixed powder is launched to each of matrix groove using to blanking subsystem, Groove is arc, is melted using the high energy laser beam that subsystem output occurs for laser to mixed powder Fast Fixed-point in groove, high energy Laser beam acts on groove, realizes the melting zone without external carbuncle quickly from convection current metallurgy, quickly preparation multiple groups are different in a short time The laser gain material alloy sample of ingredient.Overcome traditional molten alloy speed it is slow, easily segregation the shortcomings that, be convenient for application and promotion.
2, the present invention is exported by installing weighing sensor, check at the discharging gate low order position of nozzle to blanking subsystem Material it is whether accurate, when weighing sensor acquisition mixed all kinds of metal powders gross mass be not equal to preset value when, Powder guiding device is moved to outside matrix by the first three freedom degree manipulator, and computer controls automatic sliding door and opens, mixed all kinds of Metal powder is thrown in powder guiding device, and the osculum end through flared vessel is fallen into returnable, guarantees to obtain in each groove The powder quality that takes it is known that each metal quality ratio it is known that the foundation for material gene pool provides reliable data and supports, accurately Reliably.
3, the method for the present invention step is simple, by completing to launch metal quality in all grooves than different mixed powders Afterwards, subsystem occurs using laser to concentrate to the mixed powder progress microcell metallurgy in all grooves, makes high energy laser beam to pre- The mixed powder fixed point microcell melting being placed in matrix upper groove, the strong convection based on laser molten pool realize that metal material microcell closes Aurification realizes the quick preparation of polynary multicomponent metal material, finally, each composition quality with laser gain material alloy sample is BP The input layer of neural network model is BP mind with the microstructural parameters of laser gain material alloy sample, hardness, elasticity modulus Output node layer through network model, training BP neural network model, the expansion of gene pool is carried out to existing alloy, realizes laser Increase the efficient design and preparation of material alloy, convenient for promoting the use of.
In conclusion the present invention makes high energy laser beam to being preset in matrix fovea superior by building laser microcell metallurgical system Mixed powder in slot pinpoints microcell melting, and the strong convection based on laser molten pool realizes metal material microcell alloying, realizes more The quick preparation of first multicomponent metal material carries out the expansion of gene pool to existing alloy, realizes the efficient of laser gain material alloy Design and preparation, convenient for promoting the use of.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Detailed description of the invention
Fig. 1 is matching relationship schematic diagram of the present invention to blanking subsystem and matrix.
Fig. 2 is the matching relationship schematic diagram that subsystem and matrix occur for laser of the present invention.
Fig. 3 is the top view of matrix of the present invention.
Fig. 4 is the A-A cross-sectional view of Fig. 3.
Fig. 5 is the matching relationship schematic diagram of mixed powder of the present invention and groove.
Fig. 6 is the matching relationship schematic diagram of laser gain material alloy sample of the present invention and groove.
Fig. 7 is the method flow block diagram of the method for the present invention.
Description of symbols:
1-single channel vermicelli making machine;2-single channel powder feeding pipes;3-collection tube cells;
4-meal mixers;8-discharging gates;9-feeders;
10-matrixes;11-grooves;Subsystem occurs for 12-laser;
13-high energy laser beams;14-mixed powders;
15-laser gain material alloy samples.
Specific embodiment
As shown in Figures 1 to 7, the method for building up of a kind of material gene pool based on laser microcell metallurgy of the invention, packet Include following steps:
Step 1: building laser microcell metallurgical system: matrix 10 is horizontally arranged on experimental bench, by being to blanking subsystem Matrix 10 launches mixed powder 14, and subsystem 12 occurs by 14 microcell metallurgy of mixed powder into laser gain material alloy sample by laser 15, matrix 10 described occur subsystem 12 to blanking subsystem and laser and constitutes laser microcell metallurgical system;
Matrix 10 is ceramic matrix, and N number of domed groove 11 in array arrangement is offered on the ceramic matrix, The value of radius of sphericity R where the groove 11 is 5mm~20mm, and the value of the depth h of groove 11 isPhase The spacing of adjacent two grooves 11 is 0.5cm~1cm, wherein N is the positive integer not less than 100;
It should be noted that matrix 10 uses ceramic matrix, avoid that wetting action occurs with metal powder, and on matrix 10 Multiple grooves 11 are opened up, mixed powder 14 are launched to each of matrix 10 groove 11 using to blanking subsystem, groove 11 is ball It is crown, the high energy laser beam 13 that subsystem 12 exports occurs using laser, mixed powder Fast Fixed-point in groove 11 is melted, high energy Laser beam 13 acts on groove 11, realizes that the melting zone without external carbuncle quickly from convection current metallurgy, quickly prepares multiple groups in a short time The laser gain material alloy sample 15 of heterogeneity, overcome traditional molten alloy speed it is slow, easily segregation the shortcomings that, pushed away convenient for application Extensively.
It is described to blanking subsystem include powder extraction mechanism, to the powder extraction mechanism export various metals powder mixed Meal mixer 4 and the feeder 9 that groove 11 is accurately thrown to the mixed metal powder progress that meal mixer 4 exports, feeder 9 are installed Can be along the first three freedom degree manipulator that the X-axis, Y-axis and Z-direction of rectangular coordinate system in space move, meal mixer 4 be downward Inclination is inserted into feeder 9 and is fixed on feeder 9, and the powder extraction mechanism includes collection tube cell 3 and multiple single channel vermicelli making machines 1, single channel vermicelli making machine 1 is connected to by single channel powder feeding pipe 2 with collection tube cell 3, collects the discharge end of tube cell 3 and the feed end knot of meal mixer 4 Structure size is consistent, and the discharge end of collection tube cell 3 is connected with the feed end of meal mixer 4, and single channel vermicelli making machine 1 is to hold metal powder and essence The accurate automatic conveying device of powdery starting material of specified test metal powder is really exported, the discharge end of meal mixer 4 is equipped with out Expect that mouth 8, the discharging gate 8 are infundibulate discharging gate, the discharge end of the infundibulate discharging gate is equipped with automatic sliding door, described The side wall of infundibulate discharging gate is equipped with weighing sensor, and feeder 9 includes that hydrostatic column and setting are described in the cylinder Device bottom and the flared vessel being integrated with the hydrostatic column processing and fabricating, the osculum end of the flared vessel are to fall The discharge end of glassware 9, the size of the discharge end of feeder 9 and the open end size of groove 11 are consistent;
In the present embodiment, the meal mixer 4 tilts down 45 ° and is inserted into feeder 9.
It should be noted that installing weighing sensor at 8 low order position of discharging gate, the material exported to blanking subsystem is checked Whether expect accurate, when the gross mass of the mixed all kinds of metal powders of weighing sensor acquisition is not equal to preset value, first Feeder 9 is moved to outside matrix 10 by three freedom degree manipulator, and computer controls automatic sliding door and opens, mixed each eka-gold Belong to powder to be thrown in feeder 9, the osculum end through flared vessel is fallen into returnable, guarantees to obtain in each groove 11 The powder quality that takes it is known that each metal quality ratio it is known that the foundation for material gene pool provides reliable data and supports, accurately Reliably, the hydrostatic column and the tubaeform of the hydrostatic column bottom is set that feeder 9 is integrated using processing and fabricating Container, hydrostatic column is easily installed meal mixer 4 and receives mixed all kinds of metal powders, in the present embodiment, the mixed powder Device 4 tilts down 45 ° and is inserted into feeder 9, due to the diverging and rebound between metal powder, so that the metal powder of rebound End is to obtain the metal powder of whereabouts and fast as soon as possible leading in tube cell the purpose that flared vessel is arranged due to weight and falling Speed makes metal powder glide, that is, is admitted to high-melting-point and will not occur in the groove 11 of wetting action.
It should be noted that the accurate automatic conveying device of powdery starting material uses Authorization Notice No. for CN206552699U Powdery starting material accurate automatic conveying device.
The end facula area that the high energy laser beam 13 that subsystem 12 exports occurs for laser is less than the open end face of groove 11 Product, laser occur subsystem 12 and are mounted on can move along the X-axis, Y-axis and Z-direction of rectangular coordinate system in space the two or three freely It spends on manipulator;
It should be noted that the first three freedom degree manipulator and the second three freedom degree manipulator structure are identical, and it is all made of Authorization Notice No. is the three freedom degree manipulator of CN204772528U,
The automatic sliding door, first three freedom degree manipulator, second three freedom degree manipulator and laser hair Raw subsystem 12 is controlled by computer, and the signal input part of the signal output end of the weighing sensor and the computer connects It connects;
In the present embodiment, the metal powder is elemental metals powder or intermediate alloy powder, the grain of the metal powder Diameter is 45 μm~150 μm.
Step 2: determining metal powder type and preparing all kinds of metal powders of enough quality: according to design of alloy Determine metal powder type, choose in powder extraction mechanism with the consistent single channel vermicelli making machine 1 of metal powder number of species, and by each eka-gold Belong to that powder is enough respectively is added in each single channel vermicelli making machine 1;
Step 3: mobile feeder: recessed using being specified on the mobile feeder 9 to matrix 10 of the first three freedom degree manipulator At 11 position of slot, make the open end of the discharge end alignment indentation 11 of feeder 9, and the discharge end of feeder 9 and specified groove 11 open end in contact and seamless;
It should be noted that the open end in contact of the discharge end of feeder 9 and specified groove 11 and seamless purpose That mixed powder 14 is avoided not fall within specified groove 11 and be scattered in outside specified groove 11, change mixed powder 14 quality and The mass ratio of each metal powder, influencing the later period smelts the microstructural parameters of molding laser gain material alloy sample 15, hardness And elasticity modulus.
Step 4: fixed mixed powder gross mass and to control all kinds of metal powders according to all kinds of metal powder mass ratioes defeated simultaneously Out: according to formulaCalculate the matter of the i-th metalloid powder in the metal powder type that design of alloy determines Measure mi, wherein M is the gross mass of mixed powder 14, ρiFor the percentage for 14 gross mass of mixed powder that the i-th metalloid powder accounts for, K is Metal powder number of species, the i-th metalloid powder are placed in i-th of single channel vermicelli making machine 1;
According to K metalloid powder quality ratio, computer control K metalloid powder exports simultaneously;
Step 5: the mixing and dispensing of all kinds of metal powders: metal powder passes through single channel powder feeding pipe 2 in single channel vermicelli making machine 1 It is input to collection tube cell 3, all kinds of metal powders collected in tube cell 3 are input to meal mixer 4, mixed each eka-gold in meal mixer 4 again Belong to powder to be snapped down at 8 position of discharging gate, when the gross mass of the mixed all kinds of metal powders of weighing sensor acquisition is M When, computer controls automatic sliding door and opens, and mixed all kinds of metal powders are thrown in feeder 9, through flared vessel Osculum end fall into specified groove 11 after execute step 6;When the mixed all kinds of metal powders of weighing sensor acquisition Gross mass be not equal to M when, feeder 9 is moved to outside matrix 10 by the first three freedom degree manipulator, computer control open automatically Men Kaiqi is closed, mixed all kinds of metal powders are thrown in feeder 9, and the osculum end through flared vessel falls into returnable In after execute step 3;
In the present embodiment, the mixed powder 14 is located at the depth that the height in groove 11 is not higher than groove 11.
It should be noted that the gross mass M of mixed powder 14 is preferably density in the volume and all kinds of metal powders of groove 11 The product of the density value of the smallest metal realizes that groove 11 can accommodate the mixed powder 14 of any mass ratio.
Step 6: new groove 11, is considered as circulation step three after specified groove 11 by the groove 11 more renewed, until complete At on matrix 10 the dispensing of mixed powder 14 in fluted 11;
Step 7: setting laser occurs the laser processing parameter of subsystem and carries out microcell metallurgy: freely using the one or three Feeder 9 is moved to outside matrix 10 by degree manipulator, and the movement of subsystem 12 is occurred for laser using the second three freedom degree manipulator To 10 top of matrix, make laser that the opening of the end hot spot alignment indentation 11 for the high energy laser beam 13 that subsystem 12 exports occur End, the laser power that the high energy laser beam 13 of the setting output of subsystem 12 occurs using laser is 1000W~3000W, each recessed 14 microcell metallurgy mode of mixed powder is all the same in slot 11;
14 microcell metallurgical process of mixed powder in any groove 11: it opens laser and subsystem 12 occurs, subsystem occurs for laser The high energy laser beam 13 of 12 outputs melts 14 Fast Fixed-point of mixed powder in groove 11, and high energy laser beam 13 acts on groove 11, Realize that the melting zone without external carbuncle quickly from convection current metallurgy, obtains laser gain material alloy sample 15;
It should be noted that after by completing to launch metal quality in all grooves 11 than different mixed powders 14, Subsystem 12 occurs using laser to concentrate to the progress microcell metallurgy of mixed powder 14 in all grooves 11, makes high energy laser beam 13 Microcell melting is pinpointed to the mixed powder 14 being preset in 10 upper groove 11 of matrix, the strong convection based on laser molten pool realizes metal Material domain alloying realizes the quick preparation of polynary multicomponent metal material.
Step 8: establishing the corresponding relationship of laser gain material alloy sample ingredient and microscopic structure, and to laser gain material alloy Sample carries out micro-nano impression test: being scanned sight to each laser gain material alloy sample 15 using light microscopic and scanning electron microscope It surveys, obtains the microstructural parameters of each laser gain material alloy sample 15, the microstructural parameters include multiple phase morphology ginsengs Number, each phase morphology parameter includes phase length, phase width and phase volume fraction;
For each laser gain material alloy sample 15 each composition quality and each laser gain material alloy sample 15 it is micro- Organizational parameter establishes corresponding relationship;
Meanwhile micro-nano impression test is carried out to each laser gain material alloy sample 15, obtain each laser gain material alloy The hardness and elastic modulus of sample 15;
In the present embodiment, utilize light microscopic and scanning electron microscope to a series of laser gain material of heterogeneities described in step 8 Alloy sample 15 carries out tissue observation, then by Image-Plus software to micro- group of each laser gain material alloy sample 15 Parameter is knitted to be characterized and extracted.
Step 9: training BP neural network model: with each composition quality of laser gain material alloy sample 15 for BP nerve net The input layer of network model is BP nerve with the microstructural parameters of laser gain material alloy sample 15, hardness and elastic modulus The output node layer of network model, training BP neural network model;
Step 10: the foundation of laser gain material alloy sample material gene pool: with the molding laser gain material alloy of microcell melting Sample 15 enriches laser gain material alloy sample material gene pool, predicts that new laser gain material alloy tries using BP neural network mould The hardness and elastic modulus of sample 15 realizes the expansion of laser gain material alloy sample material gene pool.
The present invention is using each composition quality of laser gain material alloy sample as the input layer of BP neural network model, to swash The output node layer that light increases the microstructural parameters of material alloy sample, hardness and elastic modulus is BP neural network model, training BP neural network model realizes the efficient design and preparation of laser gain material alloy, and the expansion of material gene pool is carried out to existing alloy It fills.
The above is only presently preferred embodiments of the present invention, is not intended to limit the invention in any way, it is all according to the present invention Technical spirit any simple modification to the above embodiments, change and equivalent structural changes, still fall within skill of the present invention In the protection scope of art scheme.

Claims (5)

1. a kind of method for building up of the material gene pool based on laser microcell metallurgy, which is characterized in that this method includes following step It is rapid:
Step 1: building laser microcell metallurgical system: matrix (10) are horizontally arranged on experimental bench, by being base to blanking subsystem Body (10) launches mixed powder (14), and subsystem (12) occur by mixed powder (14) microcell metallurgy into laser gain material alloy by laser Sample (15), matrix (10) described occur subsystem (12) to blanking subsystem and laser and constitute laser microcell metallurgical system;
Matrix (10) is ceramic matrix, and N number of domed groove (11) in array arrangement is offered on the ceramic matrix, The value of radius of sphericity R where the groove (11) is 5mm~20mm, and the value of the depth h of groove (11) isThe spacing of two neighboring groove (11) is 0.5cm~1cm, wherein N is the positive integer not less than 100;
The mixed powder for including powder extraction mechanism to blanking subsystem, the various metals powder that the powder extraction mechanism exports being mixed Device (4) and the feeder (9) that groove (11) are accurately thrown to the mixed metal powder progress of meal mixer (4) output, feeder (9) powder can be mixed along the first three freedom degree manipulator that the X-axis, Y-axis and Z-direction of rectangular coordinate system in space move by being mounted on Device (4), which tilts down, to be inserted into feeder (9) and is fixed on feeder (9), the powder extraction mechanism include collection tube cell (3) and Multiple single channel vermicelli making machines (1), single channel vermicelli making machine (1) are connected to by single channel powder feeding pipe (2) with collection tube cell (3), and collection tube cell (3) goes out Expect that end is consistent with the feed end structure size of meal mixer (4), the discharge end of collection tube cell (3) is connected with the feed end of meal mixer (4), Single channel vermicelli making machine (1) is to hold metal powder and accurately export to specify the powdery starting material of test metal powder accurate automatic defeated Device is sent, the discharge end of meal mixer (4) is equipped with discharging gate (8), and the discharging gate (8) is infundibulate discharging gate, the funnel The discharge end of shape discharging gate is equipped with automatic sliding door, and the side wall of the infundibulate discharging gate is equipped with weighing sensor, blanking Device (9) includes hydrostatic column and is arranged in the hydrostatic column bottom and is integrated with the hydrostatic column processing and fabricating Flared vessel, the osculum end of the flared vessel is the discharge end of feeder (9), the ruler of the discharge end of feeder (9) It is very little consistent with the open end size of groove (11);
The end facula area that the high energy laser beam (13) of subsystem (12) output occurs for laser is less than the open end of groove (11) Area, laser occur subsystem (12) and are mounted on can move along the X-axis, Y-axis and Z-direction of rectangular coordinate system in space the two or three In free degree manipulator;
Son occurs for the automatic sliding door, first three freedom degree manipulator, second three freedom degree manipulator and laser System (12) is controlled by computer, and the signal input part of the signal output end of the weighing sensor and the computer connects It connects;
Step 2: determining metal powder type and preparing all kinds of metal powders of enough quality: being determined according to design of alloy Metal powder type, choose in powder extraction mechanism with the consistent single channel vermicelli making machine (1) of metal powder number of species, and by each metalloid Powder is enough respectively to be added in each single channel vermicelli making machine (1);
Step 3: mobile feeder: recessed using being specified on the first three freedom degree manipulator mobile feeder (9) to matrix (10) At slot (11) position, make the open end of the discharge end alignment indentation (11) of feeder (9), and the discharge end and finger of feeder (9) The open end in contact of fixed groove (11) and seamless;
It is exported simultaneously Step 4: fixing mixed powder gross mass and controlling all kinds of metal powders according to all kinds of metal powder mass ratioes: According to formulaCalculate the quality of the i-th metalloid powder in the metal powder type that design of alloy determines mi, wherein M is the gross mass of mixed powder (14), ρiFor the percentage of mixed powder (14) gross mass that the i-th metalloid powder accounts for, K For metal powder number of species, the i-th metalloid powder is placed in i-th of single channel vermicelli making machine (1);
According to K metalloid powder quality ratio, computer control K metalloid powder exports simultaneously;
Step 5: the mixing and dispensing of all kinds of metal powders: metal powder passes through single channel powder feeding pipe (2) in single channel vermicelli making machine (1) It is input to collection tube cell (3), all kinds of metal powders in collection tube cell (3) are input to meal mixer (4) again, in meal mixer (4) after mixing All kinds of metal powders be snapped down at discharging gate (8) position, when the mixed all kinds of metal powders of weighing sensor acquisition When gross mass is M, computer controls automatic sliding door and opens, and mixed all kinds of metal powders are thrown in feeder (9), passes through The osculum end of flared vessel executes step 6 after falling into specified groove (11);When weighing sensor acquisition it is mixed When the gross mass of all kinds of metal powders is not equal to M, feeder (9) is moved to matrix (10) outside by the first three freedom degree manipulator, Computer controls automatic sliding door and opens, and mixed all kinds of metal powders are thrown in feeder (9), through flared vessel Osculum end executes step 3 after falling into returnable;
Step 6: the groove (11) more renewed, is considered as specified groove (11) circulation step three afterwards for new groove (11), until Complete matrix (10) on fluted (11) interior mixed powder (14) dispensing;
Step 7: setting laser occurs the laser processing parameter of subsystem and carries out microcell metallurgy: utilizing the first Three Degree Of Freedom machine Feeder (9) is moved to matrix (10) outside by tool hand, and subsystem (12) are occurred for laser using the second three freedom degree manipulator and are moved It moves to matrix (10), makes laser that the end hot spot alignment indentation of the high energy laser beam (13) of subsystem (12) output occur (11) open end, the laser power that the high energy laser beam (13) of subsystem (12) setting output occurs using laser is 1000W ~3000W, each groove (11) interior mixed powder (14) microcell metallurgy mode are all the same;
Any groove (11) interior mixed powder (14) microcell metallurgical process: it opens laser and subsystem (12) occurs, subsystem occurs for laser The high energy laser beam (13) that (12) export of uniting melts groove (11) interior mixed powder (14) Fast Fixed-point, and high energy laser beam (13) is made For groove (11), realize that the melting zone without external carbuncle quickly from convection current metallurgy, obtains laser gain material alloy sample (15);
Step 8: establishing the corresponding relationship of laser gain material alloy sample ingredient and microscopic structure, and to laser gain material alloy sample It carries out micro-nano impression test: sight is scanned to each laser gain material alloy sample (15) using light microscopic and scanning electron microscope It surveys, obtains the microstructural parameters of each laser gain material alloy sample (15), the microstructural parameters include multiple phase morphologies Parameter, each phase morphology parameter include phase length, phase width and phase volume fraction;
For each laser gain material alloy sample (15) each composition quality and each laser gain material alloy sample (15) it is micro- Organizational parameter establishes corresponding relationship;
Meanwhile micro-nano impression test is carried out to each laser gain material alloy sample (15), obtain each laser gain material alloy examination The hardness and elastic modulus of sample (15);
Step 9: training BP neural network model: using each composition quality of laser gain material alloy sample (15) as BP neural network The input layer of model is BP nerve with the microstructural parameters of laser gain material alloy sample (15), hardness and elastic modulus The output node layer of network model, training BP neural network model;
Step 10: the foundation of laser gain material alloy sample material gene pool: with the molding laser gain material alloy sample of microcell melting (15) it enriches laser gain material alloy sample material gene pool, new laser gain material alloy sample is predicted using BP neural network mould (15) hardness and elastic modulus realizes the expansion of laser gain material alloy sample material gene pool.
2. a kind of method for building up of material gene pool based on laser microcell metallurgy described in accordance with the claim 1, feature exist In: the metal powder is elemental metals powder or intermediate alloy powder, and the partial size of the metal powder is 45 μm~150 μm.
3. a kind of method for building up of material gene pool based on laser microcell metallurgy described in accordance with the claim 1, feature exist In: the meal mixer (4) tilts down 45 ° and is inserted into feeder (9).
4. a kind of method for building up of material gene pool based on laser microcell metallurgy described in accordance with the claim 1, feature exist In: the mixed powder (14) is located at the depth that the height in groove (11) is not higher than groove (11).
5. a kind of method for building up of material gene pool based on laser microcell metallurgy described in accordance with the claim 1, feature exist In: a series of laser gain material alloy sample (15) of heterogeneities is carried out using light microscopic and scanning electron microscope described in step 8 Then tissue observation carries out table by microstructural parameters of the Image-Plus software to each laser gain material alloy sample (15) Sign and extraction.
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