CN109465386A - The preparation of TiCp/EPS evaporative pattern and its base steel composite material technique - Google Patents
The preparation of TiCp/EPS evaporative pattern and its base steel composite material technique Download PDFInfo
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- CN109465386A CN109465386A CN201811567506.5A CN201811567506A CN109465386A CN 109465386 A CN109465386 A CN 109465386A CN 201811567506 A CN201811567506 A CN 201811567506A CN 109465386 A CN109465386 A CN 109465386A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
- B22C9/046—Use of patterns which are eliminated by the liquid metal in the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/20—Measures not previously mentioned for influencing the grain structure or texture; Selection of compositions therefor
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- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
The invention discloses the preparation of TiCp/EPS evaporative pattern and its base steel composite material techniques, it is related to the technical field of the composite material lost foam casting in metal forming field, its forming technology includes the preparation of TiCp/EPS composite material evaporative pattern apperance, and apperance coating is coated with, dries, the process flow of base steel composite material Negative casting of EPC, pouring technology, heat treatment process etc..The invention enables being firmly combined that TiC particle is made to be uniformly dispersed between TiC particle and matrix, product comprehensive mechanical property is improved, can make large-scale, complex-shaped TiC by lost foam casting enhances base steel composite material part.
Description
Technical field
The present invention relates to the technical field of the composite material lost foam casting in metal forming field, especially a kind of TiCp/
EPS lost foam casting forming technology.
Background technique
TiC has not only taken into account the satisfactory electrical conductivity of the strong corrosion resistance of ceramics, anti-oxidant, high-temperature stability and metal, because
This can be with fictitious hosts valuableness, the yttrium oxide of complex process, zirconium oxide TiC because it is with high-melting-point, high microhardness, Gao Duan
Toughness, low-density and many excellent physical properties and chemical property such as good thermal stability and chemical stability are split, are formed
To be most suitable for one of the ceramics for being used to enhance base steel composite material.Research also shows TiC and the wetability of steel is preferable, TiC with
The thermal expansion matching of steel matrix is good, guarantees to play composite material high rigidity, the excellent combination mechanical property of high tenacity, so that material
Material becomes more safe and reliable in practical applications.Yafeng Yang etc. using molten liquid steel light SHS reaction method at
Function is prepared for in-situ endogenic TiC-TiB2 local enhancement base steel composite material, and the dense structure in local enhancement area is uniform, TiC/
Composite material when TiB2 molar ratio is 1:2 has high macrohardness and best wear-resisting property.
H.Y.Wang etc. is successfully prepared TiC-TiB2 complex phase enhancing base steel composite material using reactive infiltration method, utilizes
The high temperature of molten steel lights Ni-Ti-B4C system and self-propagating reaction occurs.Research shows that enhancing particle be distributed in steel matrix it is non-
Often uniformly, average-size is at 2~5 μm.
Yisan Wang et al. utilizes a kind of cast-sintering technology, using the original comprising self-lubricating graphite and carbon chromium compound
Raw VC and TiC particle reinforced iron matrix composites in position, particle is sintered on the surface Fe in casting process.Studies have shown that
For the size of particle at 1~3 μm, the interface cohesion of particle and matrix is good.
K. the method that DAS et al. uses that molten steel lights self-propagating reaction successfully prepares TiC particle enhancing Fe-0.8%
The actual volume content of C-14%Mn austenitic steel based composites, TiC particle is designed to be divided into 9~10Vol.%(
13Vol.%), it finds that the tissue of composite material has a great impact to wear-resisting property in experiment, enhances the combination of particle and matrix
In order, clean interfaces are pollution-free.
Jilin University is ignited Al, Ti and C powder mixed powder green compact in casting mold using molten steel high temperature, passes through its exothermic reaction
TiC is synthesized, to be successfully prepared TiC local enhancement base steel composite material.But a large amount of gas of violent exothermic reaction release
Body (such as Al steam) makes in composite material that there are many stomatas, limits the application of the technology.
Shenyang metal research institute uses Ti powder, C powder and pure magnesium ingot for raw material, and temperature uses 700 DEG C, 750 DEG C and 800
DEG C, 1.5 hours are kept the temperature under protection of argon gas, furnace cooling is prepared for in_situ TiC/Mg composite material.The main of the technology lacks
It is smaller to put the composite gauge for being to prepare, due to the finite thickness of penetrating layer, is difficult to prepare large scale either heavy section casting.
The raw particle preparation TiC base steel that enhances casts surface layer gradient composites in Wang Yisan et al. reaction.Ingredient is matched
Than (wt.%) are as follows: Ti15.0, Cr25.0, Ni10.0, C4.0, Si5.4, Yu Wei Fe.The boron of 3wt.% is additionally added in coating material
The above material is mixed with the waterglass of 7wt.%, is tuned into paste, is coated on the side wall of PVA cement bonded mold, with a thickness of 3mm by sand；
Tu Hou, casting mold are toasted through 180 DEG C, 4h.Casting uses rising pouring mode, the 45# molten steel that temperature is 1600 DEG C.Thickness can be formed after solidification
Degree is the surface layer the TiC/Fe gradient composites of 4.2mm.The granular size of TiC is 1~3 μm in composite material, in subsurface stratum,
The volume fraction of TiC is up to 38%, and distribution is from outward appearance to inner essence.The tissue and ingredient of Fe-TiC skin layer composite material all at gradient distribution,
It is gradually transitions precursor alloy.Under the conditions of heavy duty, dry sliding friction, which shows extraordinary wearability, but
Production efficiency is relatively low.
Chen Jun etc. is successfully prepared the as cast condition Fe- that TiC volume fraction is respectively 5%, 10% and 16% using reaction in-situ
20Cr-14Ni based composites.The room temperature and high temperature tensile properties for having studied the composite material, analyze fracture characteristic.As a result
Show that the comprehensive tensile property of the room temperature of the TiC composite material containing volume fraction 5% and 10% is apparently higher than matrix alloy；TiC
Volume fraction be 10% when, composite material have optimal high temperature tensile properties.
2013, and one patent of applicant application (patent No. ZL201310329628.1, it is entitled to disappear
The preparation process of lost pattern casting potassium steel abrasive-resistant composite surface material), which prepares surface using the method for lost foam casting
Composite material, processing step are as follows: prepare water based paint, the raw material for preparing water based paint is selected: SiC particle, ferrochrome powder, dilute
Soil, EPS bead, CMC, weigh SiC particle, ferrochrome powder, rare earth, EPS bead, CMC in parts by weight；It will be obtained water base
Applying coating is on evaporative pattern apperance surface；Evaporative pattern apperance after coating is put into drying room baking, and water based paint painting is hung up properly
After apply common lost foam cast steel coating, dry.Group case, dry sand vibration molding；Casting.The surface abrasion resistance prepared by the technique is compound
Material, surface composite layer is with a thickness of 3~4mm.
By implement after it has furthermore been found that the technique due to being in apperance surface coating paint, surface coating layer and metal
Metallurgical reaction occurs for liquid, forms composite surface material layer, i.e. a part of part.However, when apperance coats coating, due to applying
Material thickness is difficult to control accurately, and the size of part is caused to be unable to control, and therefore, brings very big difficulty to batch production.Moreover,
Wearing layer thickness can not be done too thick, and wearing layer thickness is typically only capable to 3~5mm.
Summary of the invention
The technical problem to be solved by the invention is to provide TiCp/EPS evaporative pattern preparation and its base steel composite material technique,
So that being firmly combined between TiC particle and matrix, TiC particle is made to be uniformly dispersed, improves product comprehensive mechanical property, pass through evaporative pattern
Casting reduces Operating Complexity, can make large-scale, complex-shaped TiC enhancing base steel composite material part, reduce production cost,
Increase wearing layer thickness, improves production efficiency.
In order to solve the above technical problems, the technical scheme adopted by the invention is that:
A kind of TiCp/EPS evaporative pattern preparation process, comprises the technical steps that:
Step 1: mixing preparation: TiC particle, rare earth powder, EPS bead, adhesive are weighed by volume parts, by weighed TiC
Grain, rare earth powder, EPS bead, adhesive are uniformly mixed；
Step 2: preheated mold, so that mold temperature reaches 100 DEG C；
Step 3: mixing material to be inserted into mold using compressed air, is passed through steam into mold, vapor (steam) temperature is 110 DEG C~
130℃；By mould inner pressure control in 0.15~0.25MPa, pressure maintaining operation is carried out；
Step 4: after pressure maintaining operates, discharging hot steam, spray water to the mold back side, so that mold is cooled to 40~50 DEG C, to mould
Depanning after apperance setting, obtains TiCp/EPS evaporative pattern apperance in having.
Technical solution of the present invention further improvement lies in that: the granularity of TiC particle be 600~2000 mesh.
Technical solution of the present invention further improvement lies in that: complicated apperance carries out piecemeal manufacture, then by each module assembled
Whole apperance and running gate system are assembled into apperance group by integral apperance.
Technical solution of the present invention further improvement lies in that: in step 3 vapor (steam) temperature be 120 DEG C, the dwell time be 1~
8min。
Technical solution of the present invention further improvement lies in that: the raw material volume number of TiCp/EPS evaporative pattern apperance are as follows:
5~15 parts of TiC particle, 1~2 part of rare earth powder, 80~93 parts of EPS bead, 1~3 part of adhesive.
Technical solution of the present invention further improvement lies in that: the granularity of TiC particle be 600~2000 mesh.
A kind of base steel composite casting technology, it is characterised in that: the TiCp/EPS of any one preparation is required using right 1~4
Evaporative pattern apperance,
Specific process step are as follows:
(1) cast steel evaporative pattern cast paint is applied on TiCp/EPS apperance surface；
(2) the TiCp/EPS apperance coated will be smeared and be put into drying room baking, 50~55 DEG C of baking temperature, drying room it is opposite
Humidity is less than or equal to 30%；
(3) case, dry sand vibration molding are organized；
(4) pour steel into sandbox, pouring temperature are 1350~1600 DEG C, keep the temperature 3~12 hours after being poured, mould turnover,
Knockout obtains casting；
(5) casting is heat-treated, heating temperature is 800 DEG C~1100 DEG C, and soaking time is 1~3h；
Technical solution of the present invention further improvement lies in that: cast steel evaporative pattern cast paint layer is with a thickness of 1.2~1.8mm.
Technical solution of the present invention further improvement lies in that: casting use vacuum-assist pouring, vacuum degree be 0.03~
0.06MPa, dwell time are 10~60 minutes.
Technical solution of the present invention further improvement lies in that: cast steel evaporative pattern cast paint is ZG-1 steel moulder's paint.
By adopting the above-described technical solution, the technological progress achieved by the present invention is:
The invention enables being firmly combined between TiC particle and matrix, TiC particle is made to be uniformly dispersed, improves product comprehensive mechanical property,
Operating Complexity is reduced by Negative casting of EPC, large-scale, complex-shaped TiC enhancing base steel composite material zero can be made
Part reduces production cost, increases wearing layer Thickness ness, improves the life of ceramic particle enhancing base steel composite material part
Produce efficiency.
The present invention mainly uses the raw materials such as TiC particle, rare earth powder, additive, EPS bead, and TiC particle source is wide, price
Cheaply, it reduces costs.Hard phase TiC particle is evenly distributed in steel matrix, plays the role of dispersion-strengtherning, while TiC
Particle has shared external load as hard phase, reduces the abrasive action to steel matrix.EPS bead has certain resistance to compression
Intensity guarantees TiC particle to be mixed into before molten steel and defeated and dispersed reunion do not occur, while must have good volatility again, guarantee with
It being capable of Quick-gasifying disappearance after high-temperature molten steel effect.
Ni improve TiC particle distribution and TiC particle and metallic matrix interfacial combined function, make TiC particle with
Steel matrix forms continuous firm combination interface, reduces interface hole, improves TiC particle and imitates to the enhancing of steel matrix
Fruit.The Ni for being coated on TiC particle surface layer can be infinitely solid-solubilized in steel matrix under high temperature action, promote molten steel alloying element to
Diffusion around TiC particle phase increases TiC particle surface energy, reduces the angle of wetting of TiC particle and steel matrix.TiC of cladding
Grain produces metallurgical bonding, the Fe of interface zone with base steel body interface3Ni2Mutually it is face-centred cubic structure, is conducive to discharge strain energy
And dislocation energy, Fe-Fe3Ni2The stepped combination interface of-TiC has continuity, improves interfacial combined function.Ni can
It reduces critical transitions humidity and reduces the diffusion velocity of each element in steel, thus the harden ability of steel can be improved in it.
Rare earth element has larger solid solubility in magnesium, and the content of rare earth of rare earth magnesium is larger, and rare earth magnesium has product good
Solution strengthening, precipitation enhancement, can effectively improve alloy structure and microstructure, improve Alloy At Room Temperature and high temperature power
Learn performance, enhancing alloy corrosion resistance and heat resistance etc..Rare earth element has good ageing strengthening to act on, and can be precipitated highly stable
Disperse phase particle, so as to increase substantially elevated temperature strength and creep resistance.
The method comprises the steps of firstly, preparing containing enhancing particle evaporative pattern apperance, then using lost foam casting method prepare it is compound
Material, this technique can not only prepare integral composite part, can also prepare abrasive-resistant composite surface material part, adapt to more
The manufacture of kind product.It, only need to be by the apperance containing TiC particle of preparation, further according to shape when making surface wear-resistant composites
And size is cut, and is then bonded in EPS apperance surface, abrasive-resistant composite surface material can be obtained after casting herein,
And accurate size.
TiC particle, rare earth powder, EPS bead, adhesive volume ratio make the TiC in preforming apperance obtain EPS pearl
The good support of grain, TiC particle can be uniformly distributed in the space based on EPS bead, and segregation does not occur in even density, be guaranteed
The TiC even particle distribution of molten metal forward position preparation.
The wearing layer thickness equal with disappearance mold thickness, the coating of comparison apperance surface are obtained by lost foam casting negative pressure
The technique of coating can greatly increase wearing layer thickness.
The present invention adapts to the manufacture of complicated shape ceramic particle enhancing base steel composite material parts product, adapts to thin-walled or thickness
The production of big base steel composite material part, improves the accuracy to size of base steel composite material product.
Strong operability of the present invention, production cost is low, high production efficiency, it is easy to accomplish industrialized production is conducive to energy conservation drop
Consumption.
The present invention improves the quality of base steel composite material product, has refined crystallite dimension；Respectively it is distributed in steel matrix
TiC reinforced phase hinders the movement of dislocation, plays pinning effect to dislocation motion, has achieved the effect that dispersion-strengtherning.Reduce contracting
Hole and shrinkage porosite, TiC particle are evenly distributed in matrix, improve the mechanical property of part, extend the service life of part.
Specific embodiment
The present invention is described in further details below with reference to embodiment:
The invention discloses a kind of TiCp/EPS evaporative pattern preparation process, specifically a kind of evaporative pattern apperance preparation process,
And the casting forming process using the evaporative pattern apperance.Here is specific embodiment:
A kind of TiCp/EPS evaporative pattern preparation process, comprises the technical steps that:
Step 1: mixing preparation: the surface TiC coats Ni powder, weighs TiC particle by volume parts, rare earth powder, EPS bead, coheres
Weighed TiC particle, rare earth powder, EPS bead, adhesive are uniformly mixed by agent.Preferably, the granularity of TiC particle be 600~
1200 mesh.Further, it is preferred that the raw material volume number of TiCp/EPS evaporative pattern apperance are as follows: 5~15 parts of TiC particle, rare earth powder
1~2 part, 80~93 parts of EPS bead, 1~3 part of adhesive；The rare earth powder is rare earth magnesium powder.
Step 2: preheated mold, so that mold temperature reaches 100 DEG C.
Step 3: mixing material being inserted into mold using compressed air, steam is passed through into mold, vapor (steam) temperature is 110 DEG C
~130 DEG C；By mould inner pressure control in 0.15~0.25MPa, pressure maintaining operation is carried out；Dwell time is set as 1~8min.
Step 4: after pressure maintaining operates, hot steam is discharged, sprays water to the mold back side, mold is made to be cooled to 40~50 DEG C,
The depanning after apperance setting in mold, obtains TiCp/EPS evaporative pattern apperance.
If it is for the complicated apperance of production, then complicated apperance be subjected to piecemeal manufacture, then by each module assembled at
Whole apperance and running gate system are assembled into apperance group by whole apperance.
TiCp/EPS evaporative pattern base steel composite casting technology, the TiCp/EPS evaporative pattern mould prepared using above-mentioned technique
Sample.Specific steps are as follows:
(1) cast steel evaporative pattern cast paint is applied on TiCp/EPS apperance surface.Cast steel evaporative pattern casting is preferably set up in the step
Making thickness of coating layer is 1.2~1.8mm.Further preferred cast steel evaporative pattern cast paint is ZG-1 steel moulder's paint.
(2) the TiCp/EPS apperance coated will be smeared and be put into drying room baking, 50~55 DEG C of baking temperature, drying room
Relative humidity is less than or equal to 30%.
(3) case, dry sand vibration molding are organized.
(4) pour steel into sandbox, pouring temperature are 1350~1600 DEG C, keep the temperature 3~12 hours after being poured, turn over
Case, knockout, obtain casting.Casting uses vacuum-assist pouring, and vacuum degree is 0.03~0.06MPa, and the dwell time is 10~60 minutes.
(5) casting is heat-treated, heating temperature is 800 DEG C~1100 DEG C, and soaking time is 1~3h.
The invention discloses a kind of TiCp/EPS preparation and base steel composite material lost foam casting forming technologies, are a kind of new
The metallic composite preparation process of type, the forming technology include the preparation of TiCp/EPS composite material apperance, and apperance coating applies
Extension, drying, base steel composite material lost foam casting process process, pouring technology, heat treatment process etc..
EPS in the present invention refers to polystyrene foam (Expanded Polystyrene abbreviation EPS), is a kind of light-duty
High molecular polymer.It is foaming agent to be added using polystyrene resin, while heating is softened, and gas is generated, and forms one
The foamed plastics of kind rigid closed cell structure.
The invention enables being firmly combined between TiC particle and matrix, product strength is improved, is reduced by lost foam casting
Operating Complexity simplifies process flow, reduces production cost, improves ceramic particle enhancing base steel composite material part
Production efficiency.
The present invention mainly uses the raw materials such as TiC particle, rare earth powder, additive, EPS bead, and TiC particle source is wide, price
Cheaply, it reduces costs.
The Ni for being coated on TiC particle surface layer can be infinitely solid-solubilized in steel matrix under high temperature action, promote molten steel alloy
Element increases TiC particle surface energy to the diffusion around TiC particle phase, reduces the angle of wetting of TiC particle and steel matrix.TiC
The qualitative analysis of grain and steel matrix composite layer shows that the main object of surface interface influence area is mutually Fe3Ni2Phase, TiC phase
With Fe phase.Make the TiC particle coated through Ni and the not simple cast setting of steel matrix interface cohesion mode, has occurred micro-
Weakly reactive metallurgical bonding, the Fe of interface zone3Ni2Mutually it is face-centred cubic structure, is conducive to discharge strain energy and dislocation energy, because
This Fe-Fe3Ni2The stepped combination interface of-TiC has continuity, and interfacial combined function is improved.Ni can reduce critical turn
Degree of getting wet and the diffusion velocity for reducing each element in steel, thus the harden ability of steel can be improved in it.
The method comprises the steps of firstly, preparing containing enhancing particle evaporative pattern apperance, then using lost foam casting method prepare it is compound
Material, this technique can not only prepare integral composite part, can also prepare abrasive-resistant composite surface material part, adapt to more
The manufacture of kind product.It, only need to be by the apperance containing TiC particle of preparation, further according to shape when making surface wear-resistant composites
And size is cut, and is then bonded in EPS apperance surface, abrasive-resistant composite surface material can be obtained after casting herein,
And accurate size.
The present invention adapts to the manufacture of complicated shape ceramic particle enhancing base steel composite material parts product, adapts to thin-walled or thickness
The production of big base steel composite material part, improves the accuracy to size of base steel composite material product.
Strong operability of the present invention, production cost is low, high production efficiency, it is easy to accomplish industrialized production is conducive to energy conservation drop
Consumption.
The present invention improves the quality of base steel composite material product, reduces shrinkage cavity and shrinkage porosite, titanium alloy particle is in matrix
It is inside evenly distributed, avoids composition cluster, improve the mechanical property of part, extend the service life of part.
The following are specific embodiments:
Embodiment 1:
A kind of TiCp/EPS evaporative pattern preparation process, comprises the technical steps that:
Step 1: mixing preparation: the surface TiC coats Ni powder, weighs 10 parts of TiC particle, 2 parts of rare earth powder, EPS pearl by volume parts
Grain 87 parts, 1 part of adhesive, and weighed TiC particle, rare earth powder, EPS bead, adhesive are uniformly mixed.Wherein, TiC particle
Granularity be 600 mesh, the rare earth powder be rare earth magnesium powder.
Step 2: preheated mold, so that mold temperature reaches 100 DEG C.
Step 3: mixing material being inserted into mold using compressed air, steam, vapor (steam) temperature 120 are passed through into mold
℃；By mould inner pressure control in 0.18MPa, pressure maintaining operation is carried out, the dwell time is set as 1min.
Step 4: after pressure maintaining operates, discharging hot steam, spray water to the mold back side, so that mold is cooled to 47 DEG C, to mould
Depanning after apperance setting, obtains TiCp/EPS evaporative pattern apperance in having.
TiCp/EPS evaporative pattern base steel composite casting technology, the TiCp/EPS evaporative pattern mould prepared using above-mentioned technique
Sample.Specific steps are as follows:
(1) cast steel evaporative pattern cast paint is applied on TiCp/EPS apperance surface.Cast steel evaporative pattern casting is preferably set up in the step
Making thickness of coating layer is 1.2mm, and cast steel evaporative pattern cast paint is ZG-1 steel moulder's paint.
(2) the TiCp/EPS apperance coated will be smeared and be put into drying room baking, 50 DEG C of baking temperature, drying room it is opposite
Humidity is less than or equal to 30%.
(3) case, dry sand vibration molding are organized.
(4) it is poured, pouring temperature is 1350 DEG C, and casting alloy is potassium steel, keeps the temperature 3 hours after being poured, mould turnover is fallen
Sand obtains casting.Casting uses vacuum-assist pouring, vacuum degree 0.03MPa, and the dwell time is 10 minutes.
(5) casting is heat-treated, heating temperature is 1000 DEG C, soaking time 2h.
Embodiment 2:
A kind of TiCp/EPS evaporative pattern preparation process, comprises the technical steps that:
Step 1: mixing preparation: the surface TiC coats Ni powder, weighs 5 parts of TiC particle, 2 parts of rare earth powder, EPS bead by volume parts
90 parts, 3 parts of adhesive, and weighed TiC particle, rare earth powder, EPS bead, adhesive are uniformly mixed.Wherein, TiC particle
Granularity is 800 mesh, and the rare earth powder is rare earth magnesium powder.
Step 2: preheated mold, so that mold temperature reaches 100 DEG C.
Step 3: mixing material being inserted into mold using compressed air, steam, vapor (steam) temperature 125 are passed through into mold
℃；By mould inner pressure control in 0.23MPa, pressure maintaining operation is carried out, the dwell time is set as 5min.
Step 4: after pressure maintaining operates, discharging hot steam, spray water to the mold back side, so that mold is cooled to 42 DEG C, to mould
Depanning after apperance setting, obtains TiCp/EPS evaporative pattern apperance in having.
TiCp/EPS evaporative pattern base steel composite casting technology, the TiCp/EPS evaporative pattern mould prepared using above-mentioned technique
Sample.Specific steps are as follows:
(1) cast steel evaporative pattern cast paint is applied on TiCp/EPS apperance surface.Cast steel evaporative pattern casting is preferably set up in the step
Making thickness of coating layer is 1.8mm, and cast steel evaporative pattern cast paint is ZG-1 steel moulder's paint.
(2) the TiCp/EPS apperance coated will be smeared and be put into drying room baking, 55 DEG C of baking temperature, drying room it is opposite
Humidity is less than or equal to 30%.
(3) case, dry sand vibration molding are organized.
(4) it is poured, pouring temperature is 1550 DEG C, keeps the temperature 12 hours after being poured, mould turnover, knockout obtain casting.Casting
Using vacuum-assist pouring, vacuum degree 0.06MPa, the dwell time is 60 minutes.
(5) casting is heat-treated, heating temperature is 900 DEG C, soaking time 3h.
Embodiment 3:
A kind of TiCp/EPS evaporative pattern preparation process, comprises the technical steps that:
Step 1: mixing preparation: the surface TiC coats Ni powder, weighs 8 parts of TiC particle, 1 part of rare earth powder, EPS bead by volume parts
89 parts, 2 parts of adhesive, and weighed TiC particle, rare earth powder, EPS bead, adhesive are uniformly mixed.Wherein, TiC particle
Granularity is 1000 mesh, and the rare earth powder is rare earth magnesium powder.
Step 2: preheated mold, so that mold temperature reaches 100 DEG C.
Step 3: mixing material being inserted into mold using compressed air, steam, vapor (steam) temperature 110 are passed through into mold
℃；By mould inner pressure control in 0.25MPa, pressure maintaining operation is carried out, the dwell time is set as 7min.
Step 4: after pressure maintaining operates, discharging hot steam, spray water to the mold back side, so that mold is cooled to 45 DEG C, to mould
Depanning after apperance setting, obtains TiCp/EPS evaporative pattern apperance in having.
TiCp/EPS evaporative pattern base steel composite casting technology, the TiCp/EPS evaporative pattern mould prepared using above-mentioned technique
Sample.Specific steps are as follows:
(1) cast steel evaporative pattern cast paint is applied on TiCp/EPS apperance surface.Cast steel evaporative pattern casting is preferably set up in the step
Making thickness of coating layer is 1.6mm, and cast steel evaporative pattern cast paint is ZG-1 steel moulder's paint.
(2) the TiCp/EPS apperance coated will be smeared and be put into drying room baking, 52 DEG C of baking temperature, drying room it is opposite
Humidity is less than or equal to 30%.
(3) case, dry sand vibration molding are organized.
(4) it is poured, pouring temperature is 1500 DEG C, keeps the temperature 10 hours after being poured, mould turnover, knockout obtain casting.Casting
Using vacuum-assist pouring, vacuum degree 0.045MPa, the dwell time is 35 minutes.
(5) casting is heat-treated, heating temperature is 1000 DEG C, soaking time 1.5h.
Embodiment 4:
A kind of TiCp/EPS evaporative pattern preparation process, comprises the technical steps that:
Step 1: mixing preparation: the surface TiC coats Ni powder, weighs 12 parts of TiC particle, 1 part of rare earth powder, EPS pearl by volume parts
Grain 85 parts, 2 parts of adhesive, and weighed TiC particle, rare earth powder, EPS bead, adhesive are uniformly mixed.Wherein, TiC particle
Granularity be 700 mesh, the rare earth powder be rare earth magnesium.
Step 2: preheated mold, so that mold temperature reaches 100 DEG C.
Step 3: mixing material being inserted into mold using compressed air, steam, vapor (steam) temperature 120 are passed through into mold
℃；By mould inner pressure control in 0.2MPa, pressure maintaining operation is carried out, the dwell time is set as 8min.
Step 4: after pressure maintaining operates, discharging hot steam, spray water to the mold back side, so that mold is cooled to 50 DEG C, to mould
Depanning after apperance setting, obtains TiCp/EPS evaporative pattern apperance in having.
TiCp/EPS evaporative pattern base steel composite casting technology, the TiCp/EPS evaporative pattern mould prepared using above-mentioned technique
Sample.Specific steps are as follows:
(1) cast steel evaporative pattern cast paint is applied on TiCp/EPS apperance surface.Cast steel evaporative pattern casting is preferably set up in the step
Making thickness of coating layer is 1.4mm, and cast steel evaporative pattern cast paint is ZG-1 steel moulder's paint.
(2) the TiCp/EPS apperance coated will be smeared and be put into drying room baking, 55 DEG C of baking temperature, drying room it is opposite
Humidity is less than or equal to 30%.
(3) case, dry sand vibration molding are organized.
(4) it is poured, pouring temperature is 1350 DEG C, keeps the temperature 7.5 hours after being poured, mould turnover, knockout obtain casting.It pours
Note uses vacuum-assist pouring, vacuum degree 0.035MPa, and the dwell time is 50 minutes.
(5) casting is heat-treated, heating temperature is 1050 DEG C, soaking time 2h.
Embodiment 5:
A kind of TiCp/EPS evaporative pattern preparation process, comprises the technical steps that:
Step 1: mixing preparation: the surface TiC coats Ni powder, weighs 15 parts of TiC particle, 2 parts of rare earth powder, EPS pearl by volume parts
Grain 80 parts, 3 parts of adhesive, and weighed TiC particle, rare earth powder, EPS bead, adhesive are uniformly mixed.Wherein, TiC particle
Granularity be 1200 mesh, the rare earth powder be rare earth magnesium.
Step 2: preheated mold, so that mold temperature reaches 100 DEG C.
Step 3: mixing material being inserted into mold using compressed air, steam, vapor (steam) temperature 130 are passed through into mold
℃；By mould inner pressure control in 0.15MPa, pressure maintaining operation is carried out, the dwell time is set as 3min.
Step 4: after pressure maintaining operates, discharging hot steam, spray water to the mold back side, so that mold is cooled to 40 DEG C, to mould
Depanning after apperance setting, obtains TiCp/EPS evaporative pattern apperance in having.
TiCp/EPS evaporative pattern base steel composite casting technology, the TiCp/EPS evaporative pattern mould prepared using above-mentioned technique
Sample.Specific steps are as follows:
(1) cast steel evaporative pattern cast paint is applied on TiCp/EPS apperance surface.Cast steel evaporative pattern casting is preferably set up in the step
Making thickness of coating layer is 1.3mm, and cast steel evaporative pattern cast paint is ZG-1 steel moulder's paint.
(2) the TiCp/EPS apperance coated will be smeared and be put into drying room baking, 55 DEG C of baking temperature, drying room it is opposite
Humidity is less than or equal to 30%.
(3) case, dry sand vibration molding are organized.
(4) it is poured, pouring temperature is 1400 DEG C, keeps the temperature 6 hours after being poured, mould turnover, knockout obtain casting.Casting
Using vacuum-assist pouring, vacuum degree 0.045MPa, the dwell time is 15 minutes.
(5) casting is heat-treated, heating temperature is 900 DEG C, soaking time 2.5h.
Through detecting, the mechanical property of the base steel composite material part in above-described embodiment is greatly improved, final steel
The wearability performance of base composite material parts improves 33% or more.
Above-described embodiment only expresses one embodiment of the present invention, and but it cannot be understood as to model of the present invention
The limitation enclosed.It should be pointed out that for those of ordinary skill in the art, without departing from the inventive concept of the premise, also
Several modifications and improvements can be made, these are all within the scope of protection of the present invention.
Claims (9)
1. a kind of TiCp/EPS evaporative pattern preparation process, it is characterised in that: comprise the technical steps that:
Step 1: mixing preparation: TiC particle, rare earth powder, EPS bead, adhesive are weighed by volume parts, by weighed TiC
Grain, rare earth powder, EPS bead, adhesive are uniformly mixed；
Step 2: preheated mold, so that mold temperature reaches 100 DEG C；
Step 3: mixing material to be inserted into mold using compressed air, is passed through steam into mold, vapor (steam) temperature is 110 DEG C~
130℃；By mould inner pressure control in 0.15~0.25MPa, pressure maintaining operation is carried out；
Step 4: after pressure maintaining operates, discharging hot steam, spray water to the mold back side, so that mold is cooled to 40~50 DEG C, to mould
Depanning after apperance setting, obtains TiCp/EPS evaporative pattern apperance in having；
The TiC particle surface is wrapped up through W metal and being pre-processed, and the rare earth powder is rare earth magnesium.
2. a kind of TiCp/EPS evaporative pattern preparation process according to claim 1, it is characterised in that: complicated apperance carries out
Piecemeal manufacture, then by the integral apperance of each module assembled, whole apperance and running gate system are assembled into apperance group.
3. a kind of TiCp/EPS evaporative pattern preparation process according to claim 1, it is characterised in that: steam temperature in step 3
Degree is 120 DEG C, and the dwell time is 1~8min.
4. a kind of TiCp/EPS evaporative pattern preparation process according to claim 1, it is characterised in that: TiCp/EPS evaporative pattern
The raw material volume number of apperance are as follows: 5~15 parts of TiC particle, 1~2 part of rare earth powder, 80~93 parts of EPS bead, adhesive 1~3
Part.
5. a kind of TiCp/EPS evaporative pattern preparation process according to claim 4, it is characterised in that: the granularity of TiC particle
For 600~1200 mesh.
6. a kind of base steel composite casting technology, it is characterised in that: disappeared using TiCp/EPS prepared by any one of Claims 1 to 4
Mould apperance is lost,
Specific process step are as follows:
(1) cast steel evaporative pattern cast paint is applied on TiCp/EPS apperance surface；
(2) the TiCp/EPS apperance coated will be smeared and be put into drying room baking, 50~55 DEG C of baking temperature, drying room it is opposite
Humidity is less than or equal to 30%；
(3) case, dry sand vibration molding are organized；
(4) pour steel into sandbox, pouring temperature are 1350~1600 DEG C, keep the temperature 3~12 hours after being poured, mould turnover,
Knockout obtains casting；
(5) casting is heat-treated, heating temperature is 800 DEG C~1100 DEG C, and soaking time is 1~3h.
7. a kind of base steel composite casting technology according to claim 6, it is characterised in that: cast steel evaporative pattern cast paint layer
With a thickness of 1.2~1.8mm.
8. a kind of base steel composite casting technology according to claim 6, it is characterised in that: casting uses vacuum-assist pouring, bears
Pressure degree is 0.03~0.06MPa, and the dwell time is 10~60 minutes.
9. forming technology according to claim 8, it is characterised in that: cast steel evaporative pattern cast paint is that ZG-1 cast steel applies
Material.
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