A kind of 3D printing metal-base composites and preparation method thereof
Technical field
The invention belongs to 3D printing Material Fields, and in particular to a kind of 3D printing metal-base composites and its preparation side
Method.
Background technique
Stainless steel material, high-intensitive and toughness are suitable for functional prototype and series parts, are widely used in industry
And aerospace field.
Monocrystalline sapphire whisker (Single crystal sapphire Whisker, also known as monocrystalline sapphire fiber) is
A kind of signle crystal alumina whisker with certain draw ratio has superior mechanical intensity, heat shock resistance, specific gravity small, anti-oxidant, high
The excellent physical property such as wear-resisting amount and highly corrosion resistant.Monocrystalline sapphire whisker is suitable as ceramics, metal, plastics and rubber
Reinforcing component.Therefore, monocrystalline sapphire whisker becomes the optimal selection of third generation advanced composite material.
The principle of 3D printing technique is layered manufacturing, successively increases material to generate the technology of 3D solid, so quilt again
Referred to as increases material manufacturing technology.It not only overcomes tradition and subtracts the waste and loss of material manufacture, and make product manufacturing precision, efficiently
Change, it is intelligent.The high-end product of complicated shape is especially related to, 3D printing technique shows huge superiority.It is known as
The third time industrial revolution for overturning traditional manufacture, is put into China's strategic emerging industries.But since 3D printing technique is
Conventionally manufactured mode to be overturned, 3D printing material becomes the bottleneck of 3D printing technique, the development of 3D printing technique is limited,
This also becomes the innovative point and difficult point of 3D printing technique simultaneously.
Currently, common 3D printing material is mostly plastic material, using plastic material meltability and thermoplastic feature,
Under molten condition, by squeezing out, solidifies and be layering, ultimately form product.Plastic material is because it is with good heat flow
Property, be quickly cooled down caking property and higher mechanical strength, be rapidly developed and be widely applied in 3D printing field.But 3D
Printing technique eventually applies upper development to high-end industrial circle, and resinous plastic material is unable to satisfy the demand of high-end industry,
Therefore, 3D printing material gradually develops from high molecular material to metal_based material.
3D printing mainstream forming technique includes that selective laser sintering (SLS), melting precipitating molding (FDM), cubic light are solid
Change (SLA) etc..Metal powder mainly uses selective laser sintering as 3D printing raw material.Selective Laser Sintering is
It uses high-energy beam (laser, electron beam) as heat source, selective melting is carried out to powder, is continuously accumulated after cooling, ultimately forms production
Product since the usual fusing point of metal is higher, and are oxidized easily, will affect the intensity of product in this way.Molten metal material is solidifying
Gu volume contraction during will cause huge thermal stress, this also will affect the intensity of material.On the other hand, due to metal powder
Last particle diameter distribution is uneven, and crystallisation by cooling process is complicated and uncontrollable, it may appear that crystal is grown up with dendrite etc., and material will be reduced
Mechanical property, cause product that can not obtain high-end applications.
Summary of the invention
The purpose of the present invention is to provide a kind of 3D printing metal-base composites and preparation method thereof, in stainless steel
After monocrystalline sapphire whisker is added, bending elastic modulus, the tensile strength of product at high temperature can be significantly improved, is had high-strength
The multiple performances such as degree, high temperature resistant, anti-oxidant, corrosion-resistant are used to prepare high-strength, the fine engineering component of high-ductility, such as propeller for turboprop
Machine combustion chamber, thin-walled, complex parts.
In order to achieve the above object, the technical solution of the present invention is as follows:
A kind of 3D printing metal-base composites, including following component by weight:
Iron powder 35-74%
Assist powder 20%
Monocrystalline sapphire whisker 1 ~ 30%
Lubricant 5 ~ 15%;
It is described auxiliary powder be Cr, Ni, Cu, Mn, Si, Mo, Nb and C powder mixture, assist powder in Cr,
The accounting of Ni, Cu, Mn, Si, Mo, Nb and C in 3D printing metal-base composites are as follows: Cr 12%;Ni 4%;Cu
3%;Mn 0.3%;Si 0.3%;Mo 0.2%;Nb 0.15%;C 0.05%.
The monocrystalline sapphire whisker is 0.1 ~ 1 μm of diameter, and length is 5 ~ 20 μm, preferred length is 5-10 μm;Density is
4g/cm3, purity (wt%) is the monocrystalline sapphire whisker of 90-99.9%.
The lubricant is that paraffin or methacrylate are at least one.
(1) by Fe, Cr, Ni, Cu, Mn, Si, Mo, Nb and C powder monocrystalline sapphire whisker and lubricant according to
Formula ratio is added in dispersing agent, stirs 6 ~ 18 h.The dispersing agent is deionized water or dehydrated alcohol, each powder, monocrystalline
The volume ratio of sapphire whisker and lubricant and dispersing agent is 1:1 ~ 10, and the mixing speed is 350 ~ 550r/min.
(2) Xiang Shangshu mixed liquor is being ultrasonically treated 10 ~ 30min.
(3) the uniform mixture of dispersion mixing is filtered on vacuum filtration machine.
(4) dry 4 ~ 6 h in 60 DEG C ~ 80 DEG C of drying box of gained mixed-powder will be filtered to be dried for standby.
(5) mixed-powder is placed in argon protective device, is passed through the high-purity argon gas of certain flow in advance, keep device intracavitary
Oxygen content is less than 40 μ L/ L.The high-purity argon gas flow is 4 ~ 40L/min purity >=99.99%.
(6) program is run, by laser automatic powder feeding device, mixed-powder is ejected into the molten bath of laser beam generation, shape
At the laser cladding layer that stainless steel and monocrystalline sapphire whisker combine, realized by each layer of nc program successively molten
It covers, finally obtains the three-dimensional stainless steel component of required shape.
The beneficial effects of the present invention are:
The utility model has the advantages that
(1) a kind of 3D printing of the invention metal-base composites has high intensity, high temperature resistant, anti-oxidant, corrosion-resistant
Etc. multiple performances, be suitable for functional prototype and series parts (turbine engine combustion chamber, thin-walled, complex parts), quilt
It is widely used in industry and aerospace field.
(2) a kind of 3D printing of the invention has powder granule small with metal-base composites, and particle diameter distribution is narrow, mobility
Preferably, preferable with 3D printer shaping speed matching;Product property is stablized, and precision is high.
(3) a kind of 3D printing of the invention is simple with metal-base composites process, easy to industrialized production;
(4) a kind of 3D printing of the invention is easy to get with metal-base composites raw material, at low cost, and has good ring
Border benefit and economic benefit.
Specific embodiment
The present invention is described in further detail by embodiment.
Embodiment 1
(1) the quality percentage of Fe, Cr, Ni, Cu, Mn, Si, Mo, Nb, C, monocrystalline sapphire whisker and lubricant
Than are as follows: Fe:74%, Cr:12%, Ni:4%, Cu:3%, Mn:0.3%, Si:0.3%, Mo:0.2%, Nb:
0.15 %, C:0.05%, monocrystalline sapphire whisker: 1%, paraffin: 5%.
(2) mixed-powder 1000g is weighed according to above-mentioned formula ratio and be added in anhydrous 1250ml ethyl alcohol, stir with speed
350r/min stirs 18 h.
(3) Xiang Shangshu mixed liquor is being ultrasonically treated 10 ~ 30min.
(4) the uniform mixture of dispersion mixing is filtered on vacuum filtration machine.
(5) dry 4 ~ 6 h in 80 DEG C of drying box of gained mixed-powder will be filtered to be dried for standby.
(6) mixed-powder is placed in argon protective device, is passed through the high-purity argon gas of certain flow in advance, keep device intracavitary
Oxygen content is less than 40 μ L/ L.
(7) program is run, by laser automatic powder feeding device, mixed-powder is ejected into the molten bath of laser beam generation, shape
At the laser cladding layer that stainless steel and monocrystalline sapphire whisker combine, realized by each layer of nc program successively molten
It covers, finally obtains the three-dimensional stainless steel component of required shape.
Embodiment 2
(1) the quality percentage of Fe, Cr, Ni, Cu, Mn, Si, Mo, Nb, C, monocrystalline sapphire whisker and lubricant
Than are as follows: Fe:65%, Cr:12%, Ni:4%, Cu:3 %, Mn:0.3%, Si:0.3%, Mo:0.2%, Nb:
0.15%, C:0.05%, monocrystalline sapphire whisker: 5%, paraffin: 10%.
(2) mixed-powder 1000g is weighed according to above-mentioned formula ratio and be added in anhydrous 1800ml ethyl alcohol, stir with speed
450r/min stirs 10 h.
(3) Xiang Shangshu mixed liquor is being ultrasonically treated 10 ~ 30min.
(4) the uniform mixture of dispersion mixing is filtered on vacuum filtration machine.
(5) dry 4 ~ 6 h in 80 DEG C of drying box of gained mixed-powder will be filtered to be dried for standby.
(6) mixed-powder is placed in argon protective device, is passed through the high-purity argon gas of certain flow in advance, keep device intracavitary
Oxygen content is less than 40 μ L/ L.
(7) program is run, by laser automatic powder feeding device, mixed-powder is ejected into the molten bath of laser beam generation, shape
At the laser cladding layer that stainless steel and monocrystalline sapphire whisker combine, realized by each layer of nc program successively molten
It covers, finally obtains the three-dimensional stainless steel component of required shape.
Embodiment 3
(1) the quality percentage of Fe, Cr, Ni, Cu, Mn, Si, Mo, Nb, C, monocrystalline sapphire whisker and lubricant
Than are as follows: Fe:60%, Cr:12%, Ni:4 %, Cu:3%, Mn:0.3%, Si:0.3%, Mo:0.2%, Nb:
0.15%, C:0.05%, monocrystalline sapphire whisker: 10%, paraffin: 10%.
(2) mixed-powder 1000g is weighed according to above-mentioned formula ratio and be added in anhydrous 2500ml ethyl alcohol, stir with speed
500r/min stirs 10 h.
(3) Xiang Shangshu mixed liquor is being ultrasonically treated 10 ~ 30min.
(4) the uniform mixture of dispersion mixing is filtered on vacuum filtration machine.
(5) dry 4 ~ 6 h in 60 DEG C of drying box of gained mixed-powder will be filtered to be dried for standby.
(6) mixed-powder is placed in argon protective device, is passed through the high-purity argon gas of certain flow in advance, keep device intracavitary
Oxygen content is less than 40 μ L/ L.
(7) program is run, by laser automatic powder feeding device, mixed-powder is ejected into the molten bath of laser beam generation, shape
At the laser cladding layer that stainless steel and monocrystalline sapphire whisker combine, realized by each layer of nc program successively molten
It covers, finally obtains the three-dimensional stainless steel component of required shape.
Embodiment 4
(1) the quality percentage of Fe, Cr, Ni, Cu, Mn, Si, Mo, Nb, C, monocrystalline sapphire whisker and lubricant
Than are as follows: Fe:55%, Cr:12%, Ni:4%, Cu:3%, Mn:0.3%, Si:0.3 %, Mo:0.2%, Nb:
0.15%, C:0.05%, monocrystalline sapphire whisker: 15%, methacrylate: 10%.
(2) mixed-powder 1000g is weighed according to above-mentioned formula ratio and be added in anhydrous 5000ml ethyl alcohol, stir with speed
500r/min stirs 10 h.
(3) Xiang Shangshu mixed liquor is being ultrasonically treated 10 ~ 30min.
(4) the uniform mixture of dispersion mixing is filtered on vacuum filtration machine.
(5) dry 4 ~ 6 h in 70 DEG C of drying box of gained mixed-powder will be filtered to be dried for standby.
(6) mixed-powder is placed in argon protective device, is passed through the high-purity argon gas of certain flow in advance, keep device intracavitary
Oxygen content is less than 40 μ L/ L.
(7) program is run, by laser automatic powder feeding device, mixed-powder is ejected into the molten bath of laser beam generation, shape
At the laser cladding layer that stainless steel and monocrystalline sapphire whisker combine, realized by each layer of nc program successively molten
It covers, finally obtains the three-dimensional stainless steel component of required shape.
Embodiment 5
(1) the quality percentage of Fe, Cr, Ni, Cu, Mn, Si, Mo, Nb, C, monocrystalline sapphire whisker and lubricant
Than are as follows: Fe:35 %, Cr:12%, Ni:4%, Cu:3 %, Mn:0.3%, Si:0.3%, Mo:0.2%, Nb:
0.15%, C:0.05%, monocrystalline sapphire whisker: 30%, methacrylate: 15%.
(2) mixed-powder 1000g is weighed according to above-mentioned formula ratio and be added in anhydrous 6250ml ethyl alcohol, stir with speed
550r/min stirs 6 h.
(3) Xiang Shangshu mixed liquor is being ultrasonically treated 10 ~ 30min.
(4) the uniform mixture of dispersion mixing is filtered on vacuum filtration machine.
(5) dry 4 ~ 6 h in 70 DEG C of drying box of gained mixed-powder will be filtered to be dried for standby.
(6) mixed-powder is placed in argon protective device, is passed through the high-purity argon gas of certain flow in advance, keep device intracavitary
Oxygen content is less than 40 μ L/ L.
(7) program is run, by laser automatic powder feeding device, mixed-powder is ejected into the molten bath of laser beam generation, shape
At the laser cladding layer that stainless steel and monocrystalline sapphire whisker combine, realized by each layer of nc program successively molten
It covers, finally obtains the three-dimensional stainless steel component of required shape.
Three-dimensional stainless steel component prepared by embodiment 1-5 carries out measuring mechanical property respectively, and test result is as follows:
The mechanical performance of subordinate list case study on implementation metal-base composites 3D printing part
Show 3D printing part prepared by the present invention in terms of tensile strength, hardness and elongation at break by above data
The standard of production application can be reached, and prepared by 3D printing, improve machining accuracy and production efficiency, reduction is produced into
This, thus 3D printing prepared by the present invention with metal-base composites compared with prior art, have apparent advantage.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent defines.