CN105149564B - A kind of metal hydrotalcite composite material for 3D printing and its preparation method and application method - Google Patents
A kind of metal hydrotalcite composite material for 3D printing and its preparation method and application method Download PDFInfo
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- CN105149564B CN105149564B CN201510369623.0A CN201510369623A CN105149564B CN 105149564 B CN105149564 B CN 105149564B CN 201510369623 A CN201510369623 A CN 201510369623A CN 105149564 B CN105149564 B CN 105149564B
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Abstract
A kind of metal hydrotalcite composite material for 3D printing, it is characterized in that：Metal powder is embedded in the hydrotalcite layers composition with Rotating fields, is embedded in the Rotating fields of hydrotalcite by metal powder, reaches good powder transporting, and sintering using hydrotalcite under 600 DEG C of temperature conditionss forms spinelle（MgAl2O4）And magnesia（MgO）Characteristic, obtain the support of metal powder, the loss on ignition of bonding agent reduces, it is ensured that metallic article is indeformable in sintering, overcomes the low defect of 3D printing metallic article precision.
Description
Technical field
The invention belongs to 3D printing manufacture field, and in particular to a kind of metallic composite for 3D printing.
Background technology
The appearance of 3D printing manufacturing technology, changes conventional fabrication processes completely, it is advantageous that design can be changed quickly
Mistake, improve production efficiency, reduction development cost.Compared to traditional mould development, and the complicated work such as forging, casting
Skill, simplifies intermediate link, so as to reduce the consumption of manpower and material resources, shortens the construction cycle.Relative to current domestic zero
The part construction cycle of more than 45 days, the complexity of 3D printing technique foundation parts, it is only necessary to the construction cycle of 1 ~ 7 day, and
And the manufacture view in complex partses has outstanding advantage.The presently the most crucially stabilization shaping of metal material 3D printing
Problem.
Why difficulty is big for the 3D printing manufacturing technology of metal material, because the fusing point of metal is higher, directly melts
Printing has been related to various physical processes such as solid-liquid phase change, diffusion into the surface and the heat transfer of metal.In addition, the crystal group of generation
Whether whether knitting size of uniform good, whole test specimen, internal impurity and hole etc. can all cause 3D printing metallic article
The change of energy.In order to solve these problems, be on the one hand improved in printing technology, such as laser power and Energy distribution,
The translational speed of Laser Focusing point and path, charging rate, protection air pressure, external temperature etc.；On the other hand metal dust is entered
Row is improved, by the pretreatment to metal dust, to meet the printing demand of different metal product.
The indirect 3D printing metallic article of metal dust is used at present, has effectively promoted 3D printing technique quick in metal parts
The application of manufacture.Indirect method is to be well mixed metal dust and binding agent by a certain percentage, and mixed-powder is entered with laser beam
Row selective scanning, the effect of laser make the binding agent in mixed-powder melt and by metal powder bond together, form gold
Belong to the green compact of part, then metallic article product is obtained by follow-up double sintering, metal infiltration treatment.
Chinese invention patent CN101036944 is prepared for nylon coating film metal powder material using method with plastic film；Chinese invention
Patent CN 102372918A disclose a kind of based on selective laser sintering nylon/aluminum powder composite powdery material, by nylon tree
Fat, aluminium powder, auxiliary agent are added in mechanical agitator and stirred, and sieving is obtained.Cementability by using nylon exists metal powder
Bonding can form the green compact of metal parts under lower temperature, then be that can obtain metallic article by subsequent treatment.Although this inter-species
Connection 3D printing manufactures the performance existing defects of metallic article, but this method by indirect 3D printing metal parts beats 3D
Application of the print manufacturing technology in metallic article is possibly realized.
According to above-mentioned, the formation problems of metal dust are efficiently solved by indirect 3D printing, but between metal dust passes through
The precision of 3D printing is connect due to being influenceed by metal dust transporting and bonding agent ablation, thus is difficult to obtain dense structure, outer
See accurate metallic article.Although the particle shape to 3D printing metal powder carries out spheroidising to improve the defeated of 3D printing at present
The property sent, but the reduction of particle diameter at any time, sphericity are no longer obvious to the smooth delivery of power of metal dust, and especially metal dust particle diameter is less than
At 10 microns, because of the reunion of metal dust, Hall flow velocity is caused to raise, conveying uniform reduction.
The content of the invention
Current metal dust is obtained by indirect 3D printing metal parts, it is necessary to pass through post processing sintering, metal infiltration etc.
Hard metal product.But in 3 printings and sintering process, the essence of the transporting of metal dust and bonding agent ablation to metallic article
Degree influence is serious.In order to overcome this defect, the present invention to propose a kind of metal hydrotalcite composite material for 3D printing.The gold
Category hydrotalcite composite material is main to be embedded in the Rotating fields of hydrotalcite by metal powder and constitutes, with good powder transporting and
Sintering stability.During by 3D printing, due to the sliding of hydrotalcite, when super-fine metal powder is carried with good uniform defeated
The property sent, the metallic article green compact obtained by 3D printing form spinelle by the sintering under 600 DEG C of temperature conditionss（MgAl2O4）
And magnesia（MgO）As the support of metal powder, not only ensure that metallic article is indeformable in sintering, and metallic article is strong
Degree enhancing.
A kind of metal hydrotalcite composite material for 3D printing, is achieved by the following technical solution：
A kind of preparation method of the metal hydrotalcite composite material for 3D printing, it is characterized in that：Preparation method is as follows：
1）The metal powder of 80-85 weight portions and colloidal solution are configured to dispersion liquid in stirred tank, metal powder is divided completely
Dissipate and be suspended in colloidal solution, in the state of ensuring that metal powder substantially uniformity suspends, dilute with water colloidal solution, it is ensured that dispersion liquid is good
Good mobility；
2）By 10-15 weight portions heat burn hydrotalcite add step 1) prepare metal dispersion in, set stirred tank
Vacuum pressure 0.1-0.5MPa, 30-50min is stirred with the rotating speed of 5000-10000rpm, and metal powder enters neatly with dispersion liquid
The interlayer of stone；
3）By step 2）Material filtering, the drying for obtaining, remove volatilizable thing, and further add in 450-500 DEG C of interval
Heat fires 10-25min, and hydrotalcite layers water is volatilized completely, and a small amount of colloidal materials is carbonized, by ageing, surface coating
The bonding agent of 2-3 weight portions obtains metal hydrotalcite composite material.
Preparation method step 1）Described metal powder be particle diameter less than 100 nanometers stainless steel powder, aluminium powder, nickel powder, copper powder,
At least one in zinc powder, silver powder, titanium valve.
Preparation method step 1）Described colloidal solution is in bletilla striata glue, cluster bean glue, sesbania glue, marine alga glue
It is a kind of.
Preparation method step 2）Described hydrotalcite is the bimetallic oxidation obtained in 450-500 DEG C of interval heat resolve
Thing, composition is Mg3A1O4(OH), specific surface area 200-300m2/ g.
Preparation method step 3）Described bonding agent is the one kind in wax, rosin, polyurethane.
The metal hydrotalcite composite material for 3D printing obtained by above-mentioned preparation method, it is characterized in that：Metal powder is inlayed
The hydrotalcite layers with Rotating fields are embedded in, and are formed in surface coating bonding agent.
For the application process of the metal hydrotalcite composite material of 3D printing, it is characterized in that：By 3D printing metallic article
When, due to the sliding of hydrotalcite, when super-fine metal powder is carried with good uniform transporting, obtained by 3D printing
Metallic article green compact need the sintering 20-25min under 600 DEG C of temperature conditionss, form spinelle（MgAl2O4）And magnesia
（MgO）Used as the support of metal powder, then the sintering temperature according to metal powder further improves temperature and is sintered, final to ensure
Metallic article is indeformable in sintering.
A kind of metal hydrotalcite composite material for 3D printing of the invention and its preparation method and application method.By gold
Category powder is embedded in the Rotating fields of hydrotalcite, reaches good powder transporting, and using hydrotalcite under 600 DEG C of temperature conditionss
Sintering form spinelle（MgAl2O4）And magnesia（MgO）Characteristic, obtain the support of metal powder, the loss on ignition of bonding agent subtracts
It is small, it is ensured that metallic article is indeformable in sintering, overcomes the low defect of 3D printing metallic article precision.
A kind of metal hydrotalcite composite material for 3D printing of the invention, compared with prior art, the characteristics of its protrusion
It is with excellent effect：
1st, a kind of metal hydrotalcite composite material for 3D printing of the invention, is mainly embedded in hydrotalcite by metal powder
Constituted in Rotating fields, with good powder transporting and sintering stability.
2nd, a kind of metal hydrotalcite composite material for 3D printing of the invention, using hydrotalcite in 600 DEG C of temperature conditionss
Under sintering form spinelle（MgAl2O4）And magnesia（MgO）Characteristic, obtain metal powder support, the loss on ignition of bonding agent
Reduce, overcome the low defect of 3D printing metallic article precision.
3rd, a kind of preparation method of metal hydrotalcite composite material for 3D printing of the invention, technique is easily-controllable, is adapted to rule
Modelling is produced.
Specific embodiment
Below by way of specific embodiment, the present invention is described in further detail, but this should not be interpreted as into the present invention
Scope be only limitted to following example.In the case where above method thought of the present invention is not departed from, according to ordinary skill
Various replacements or change that knowledge and customary means are made, should be included in the scope of the present invention.
Embodiment 1
1）Metal powder stainless steel powder and colloidal solution bletilla striata glue by 80 weight portion particle diameters less than 100 nanometers is in stirred tank
Dispersion liquid is configured to, metal powder is completely dispersed and is suspended in colloidal solution, in the state of ensuring that metal powder substantially uniformity suspends,
Dilute with water colloidal solution, it is ensured that the good mobility of dispersion liquid；
2）The hydrotalcite that 10 weight portions have burnt in 450-500 DEG C of interval heat resolve heat is added into step 1) gold prepared
In category dispersion liquid, stirred tank vacuum pressure 0.2MPa is set, 30min is stirred with the rotating speed of 5000rpm, metal powder is with dispersion liquid
Into the interlayer of hydrotalcite；
3）By step 2）Material filtering, the drying for obtaining, remove volatilizable thing, and further add in 450-500 DEG C of interval
Heat fires 25min, and hydrotalcite layers water is volatilized completely, and a small amount of colloidal materials is carbonized, and by ageing, surface coats 2 weights
The bonding agent wax for measuring part obtains metal hydrotalcite composite material.
The metallic article green compact that the metal hydrotalcite composite material that embodiment 1 is obtained is obtained by 3D printing are at 600 DEG C
25min is sintered under temperature conditionss, spinelle is formed（MgAl2O4）And magnesia（MgO）As the support of metal powder, then basis
Temperature is further improved and is sintered by the sintering temperature of metal powder, finally ensure that metallic article is indeformable in sintering.
Embodiment 2
1）Metallic aluminium powder of the 85 weight portion particle diameters less than 100 nanometers is prepared with colloidal solution cluster bean glue in stirred tank
Into dispersion liquid, it is completely dispersed metal powder and is suspended in colloidal solution, in the state of ensuring that metal powder substantially uniformity suspends, uses water
Dilution colloidal solution, it is ensured that the good mobility of dispersion liquid；
2）The hydrotalcite that 10 weight portions have burnt in 450-500 DEG C of interval heat resolve heat is added into step 1) gold prepared
In category dispersion liquid, stirred tank vacuum pressure 0.5MPa is set, 30min is stirred with the rotating speed of 8000rpm, metal powder is with dispersion liquid
Into the interlayer of hydrotalcite；
3）By step 2）Material filtering, the drying for obtaining, remove volatilizable thing, and further add in 450-500 DEG C of interval
Heat fires 10min, and hydrotalcite layers water is volatilized completely, and a small amount of colloidal materials is carbonized, and by ageing, surface coats 3 weights
The bonding agent rosin for measuring part obtains metal hydrotalcite composite material.
The metal hydrotalcite composite material that embodiment 2 is obtained is needed by the metallic article green compact that 3D printing is obtained
25min is sintered under 600 DEG C of temperature conditionss, spinelle is formed（MgAl2O4）And magnesia（MgO）As the support of metal powder, then
Sintering temperature according to metal powder further improves temperature and is sintered, and finally ensure that metallic article is indeformable in sintering.
Embodiment 3
1）Metal nickel powder by 82 weight portion particle diameters less than 100 nanometers is configured to colloidal solution sesbania glue in stirred tank
Dispersion liquid, is completely dispersed metal powder and is suspended in colloidal solution, dilute with water in the state of ensuring that metal powder substantially uniformity suspends
Release colloidal solution, it is ensured that the good mobility of dispersion liquid；
2）The hydrotalcite that 13 weight portions have burnt in 450-500 DEG C of interval heat resolve heat is added into step 1) gold prepared
In category dispersion liquid, stirred tank vacuum pressure 0.4MPa is set, 45min is stirred with the rotating speed of 10000rpm, metal powder is with dispersion
Liquid enters the interlayer of hydrotalcite；
3）By step 2）Material filtering, the drying for obtaining, remove volatilizable thing, and further add in 450-500 DEG C of interval
Heat fires 15min, and hydrotalcite layers water is volatilized completely, and a small amount of colloidal materials is carbonized, and by ageing, surface coats 3 weights
The bonding agent polyurethane for measuring part obtains metal hydrotalcite composite material.
The metal hydrotalcite composite material that embodiment 3 is obtained is needed by the metallic article green compact that 3D printing is obtained
20min is sintered under 600 DEG C of temperature conditionss, spinelle is formed（MgAl2O4）And magnesia（MgO）As the support of metal powder, then
Sintering temperature according to metal powder further improves temperature and is sintered, and finally ensure that metallic article is indeformable in sintering.
Embodiment 4
1）Copper powder by 80 weight portion particle diameters less than 100 nanometers is configured to colloidal solution marine alga glue in stirred tank
Dispersion liquid, is completely dispersed metal powder and is suspended in colloidal solution, dilute with water in the state of ensuring that metal powder substantially uniformity suspends
Release colloidal solution, it is ensured that the good mobility of dispersion liquid；
2）The hydrotalcite that 15 weight portions have burnt in 450-500 DEG C of interval heat resolve heat is added into step 1) gold prepared
In category dispersion liquid, stirred tank vacuum pressure 0.2MPa is set, 35min is stirred with the rotating speed of 6000rpm, metal powder is with dispersion liquid
Into the interlayer of hydrotalcite；
3）By step 2）Material filtering, the drying for obtaining, remove volatilizable thing, and further add in 450-500 DEG C of interval
Heat fires 20min, and hydrotalcite layers water is volatilized completely, and a small amount of colloidal materials is carbonized, by ageing, surface coating 2.5
The bonding agent wax of weight portion obtains metal hydrotalcite composite material.
The metal hydrotalcite composite material that embodiment 4 is obtained is needed by the metallic article green compact that 3D printing is obtained
25min is sintered under 600 DEG C of temperature conditionss, spinelle is formed（MgAl2O4）And magnesia（MgO）As the support of metal powder, then
Sintering temperature according to metal powder further improves temperature and is sintered, and finally ensure that metallic article is indeformable in sintering.
Embodiment 5
1）Metallic titanium powder of the 83 weight portion particle diameters less than 100 nanometers is prepared with colloidal solution cluster bean glue in stirred tank
Into dispersion liquid, it is completely dispersed metal powder and is suspended in colloidal solution, in the state of ensuring that metal powder substantially uniformity suspends, uses water
Dilution colloidal solution, it is ensured that the good mobility of dispersion liquid；
2）The hydrotalcite that 10 weight portions have burnt in 450-500 DEG C of interval heat resolve heat is added into step 1) gold prepared
In category dispersion liquid, stirred tank vacuum pressure 0.3MPa is set, 50min is stirred with the rotating speed of 50000rpm, metal powder is with dispersion
Liquid enters the interlayer of hydrotalcite；
3）By step 2）Material filtering, the drying for obtaining, remove volatilizable thing, and further add in 450-500 DEG C of interval
Heat fires 10min, and hydrotalcite layers water is volatilized completely, and a small amount of colloidal materials is carbonized, and by ageing, surface coats 23 weights
The bonding agent rosin for measuring part obtains metal hydrotalcite composite material.
The metal hydrotalcite composite material that embodiment 5 is obtained is needed by the metallic article green compact that 3D printing is obtained
20min is sintered under 600 DEG C of temperature conditionss, spinelle is formed（MgAl2O4）And magnesia（MgO）As the support of metal powder, then
Sintering temperature according to metal powder further improves temperature and is sintered, and finally ensure that metallic article is indeformable in sintering.
Claims (6)
1. it is a kind of for 3D printing metal hydrotalcite composite material preparation method, it is characterized in that:Preparation method is as follows：
1）The metal powder of 80-85 weight portions and colloidal solution are configured to dispersion liquid in stirred tank, are completely dispersed metal powder outstanding
In floating over colloidal solution, in the state of ensuring that metal powder substantially uniformity suspends, dilute with water colloidal solution, it is ensured that dispersion liquid is good
Mobility；
2）By 10-15 weight portions heat burn hydrotalcite add step 1) prepare metal dispersion in, set stirred tank vacuum
Pressure 0.1-0.5MPa, 30-50min is stirred with the rotating speed of 5000-10000rpm, and metal powder enters hydrotalcite with dispersion liquid
Interlayer；The wherein described hydrotalcite that heat is burnt is the bimetallic oxide obtained in 450-500 DEG C of interval heat resolve, composition
It is Mg3A1O4(OH), specific surface area is in 200-300m2/ g；
3）By step 2）Material filtering, the drying for obtaining, remove volatilizable thing, and further in 450-500 DEG C of interval heating burning
10-25min processed, hydrotalcite layers water is volatilized completely, and a small amount of colloidal materials is carbonized, by ageing, surface coating 2-3 weights
The bonding agent for measuring part obtains metal hydrotalcite composite material.
2. according to claim 1 it is a kind of for 3D printing metal hydrotalcite composite material preparation method, its feature
It is：Preparation method step 1）Described metal powder is stainless steel powder, aluminium powder, nickel powder, copper powder, zinc of the particle diameter less than 100 nanometers
At least one in powder, silver powder, titanium valve.
3. according to claim 1 a kind of metal hydrotalcite composite material for 3D printing preparation method, its feature exists
In：Preparation method step 1）Described colloidal solution is the one kind in bletilla striata glue, cluster bean glue, sesbania glue, marine alga glue.
4. according to claim 1 a kind of metal hydrotalcite composite material for 3D printing preparation method, its feature exists
In：Preparation method step 3）Described bonding agent is the one kind in wax, rosin, polyurethane.
5. the metal hydrotalcite composite wood for 3D printings that a kind of preparation method as described in claim any one of 1-4 is obtained
Material, it is characterized in that：Metal powder is embedded in the hydrotalcite layers with Rotating fields, and is formed in surface coating bonding agent.
6. the application process of the metal hydrotalcite composite material of 3D printings is used for described in a kind of claim 5, it is characterized in that：It is logical
When crossing 3D printing metallic articles, due to the sliding of hydrotalcite, when super-fine metal powder is carried with good uniform conveying
Property, the metallic article green compact for obtaining are printed by 3D 20-25min is sintered under 600 DEG C of temperature conditionss, form spinelle and oxygen
Change support of the magnesium as metal powder, then the sintering temperature according to metal powder further improves temperature and is sintered, final to ensure
Metallic article is indeformable in sintering.
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| CN101549288B (en) * | 2009-05-14 | 2011-04-13 | 北京化工大学 | Novel Dawson polyacid intercalation hydrotalcite composite material and method of preparing the same |
| CN103772838B (en) * | 2014-01-08 | 2018-09-28 | 合肥杰事杰新材料股份有限公司 | A kind of hydrotalcite-modified polystyrene microsphere material and preparation method and its application in 3D printing |
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