CN100528403C - Method for preparing casting titanium and titanium-aluminum base alloy porous ceramic mould shell - Google Patents
Method for preparing casting titanium and titanium-aluminum base alloy porous ceramic mould shell Download PDFInfo
- Publication number
- CN100528403C CN100528403C CNB2007100726013A CN200710072601A CN100528403C CN 100528403 C CN100528403 C CN 100528403C CN B2007100726013 A CNB2007100726013 A CN B2007100726013A CN 200710072601 A CN200710072601 A CN 200710072601A CN 100528403 C CN100528403 C CN 100528403C
- Authority
- CN
- China
- Prior art keywords
- coated
- shell
- base alloy
- wax
- porous ceramic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 62
- 239000000956 alloy Substances 0.000 title claims abstract description 62
- UQZIWOQVLUASCR-UHFFFAOYSA-N alumane;titanium Chemical compound [AlH3].[Ti] UQZIWOQVLUASCR-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 239000000919 ceramic Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000010936 titanium Substances 0.000 title abstract description 28
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title abstract description 27
- 229910052719 titanium Inorganic materials 0.000 title abstract description 27
- 238000005266 casting Methods 0.000 title abstract description 11
- 239000010410 layer Substances 0.000 claims abstract description 37
- 239000011248 coating agent Substances 0.000 claims abstract description 28
- 238000000576 coating method Methods 0.000 claims abstract description 28
- 239000004576 sand Substances 0.000 claims abstract description 19
- 239000000839 emulsion Substances 0.000 claims abstract description 17
- 229920000642 polymer Polymers 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 16
- 230000007704 transition Effects 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 238000002360 preparation method Methods 0.000 claims description 41
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 33
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 claims description 24
- 239000000843 powder Substances 0.000 claims description 21
- 239000004411 aluminium Substances 0.000 claims description 17
- 229910052782 aluminium Inorganic materials 0.000 claims description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 17
- 239000000080 wetting agent Substances 0.000 claims description 13
- 239000013530 defoamer Substances 0.000 claims description 12
- 239000002344 surface layer Substances 0.000 claims description 12
- 238000010792 warming Methods 0.000 claims description 9
- 230000003647 oxidation Effects 0.000 claims description 8
- 238000007254 oxidation reaction Methods 0.000 claims description 8
- 229910052845 zircon Inorganic materials 0.000 claims description 8
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 8
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 7
- 229910052726 zirconium Inorganic materials 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 4
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 4
- 208000034189 Sclerosis Diseases 0.000 claims description 3
- 239000012459 cleaning agent Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 3
- 238000009736 wetting Methods 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 2
- 230000008014 freezing Effects 0.000 claims description 2
- 238000007710 freezing Methods 0.000 claims description 2
- 238000007373 indentation Methods 0.000 claims description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 abstract description 14
- 238000005495 investment casting Methods 0.000 abstract description 6
- 238000007711 solidification Methods 0.000 abstract description 3
- 230000008023 solidification Effects 0.000 abstract description 3
- 239000011247 coating layer Substances 0.000 abstract 1
- 230000007123 defense Effects 0.000 abstract 1
- 238000003825 pressing Methods 0.000 abstract 1
- 230000002787 reinforcement Effects 0.000 abstract 1
- 239000002689 soil Substances 0.000 abstract 1
- 238000003756 stirring Methods 0.000 description 11
- 230000008602 contraction Effects 0.000 description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 229910010038 TiAl Inorganic materials 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 235000015110 jellies Nutrition 0.000 description 2
- 239000008274 jelly Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000000693 micelle Substances 0.000 description 1
- 229910052574 oxide ceramic Inorganic materials 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
铸造钛铝基合金多孔陶瓷型壳的制备方法，涉及到熔模精密铸造领域。它解决了现有铸造钛铝基合金型壳的残余强度大、易造成薄壁钛铝基合金铸件在凝固收缩过程中产生裂纹的问题。它的方法为一、蜡模压制；二、涂挂四层面层，每一层的制作过程为涂挂面层涂料、撒氧化锆土砂、室温干燥，然后涂挂下一层；三、涂挂两层过渡层，与涂挂面层的区别在于每一层涂挂含有高聚物及水乳胶的背层涂料、撒50目～70目的铝矾土砂；四、涂挂四至八层加固层，与涂挂过渡层的区别在于撒30目～40目的铝矾土砂；五、涂挂一层外层涂料，室温干燥；六、高压蒸汽脱蜡；七、焙烧型壳。本发明可以广泛地应用到国防、民用钛及钛铝基合金铸件型壳的制造中。
The invention discloses a method for preparing a cast titanium-aluminum base alloy porous ceramic shell, which relates to the field of investment precision casting. The method solves the problem that the existing cast titanium-aluminum-based alloy mold shell has high residual strength and easily causes cracks in the thin-walled titanium-aluminum-based alloy casting during solidification and shrinkage. Its method is 1. Wax mold pressing; 2. Coating and hanging four layers. The production process of each layer is to coat the surface coating, sprinkle zirconia soil sand, dry at room temperature, and then coat the next layer; 3. Coating and hanging The difference between the two transition layers and the coating layer is that each layer is coated with a back layer coating containing polymer and water emulsion, and sprinkled with bauxite sand of 50 mesh to 70 mesh; 4. Coating and hanging four to eight reinforcement layers, The difference from the coating and hanging transition layer is that 30 mesh to 40 mesh bauxite sand is sprinkled; 5, coating and hanging a layer of outer coating, and drying at room temperature; 6, high-pressure steam dewaxing; 7, roasting the shell. The invention can be widely applied to the manufacture of national defense and civilian titanium and titanium-aluminum base alloy casting shells.
Description
Technical field
The present invention relates to the precision-investment casting field, be specifically related to the preparation method of cast titanium and titanium-aluminum base alloy porous ceramic mould shell.
Background technology
Titanium and titanium aluminium base alloy have advantages such as low-density, higher Young's modulus and elevated temperature strength, good creep resistant and non-oxidizability, have good application prospects in the lightening fire resistant structure member in aerospace industry, auto industry.But the bottleneck that hinders titanium and titanium aluminium base alloy large-scale application is its temperature-room type plasticity and unworkability.Precision-investment casting is suitable for making, not having allowance and be difficult to mach complex component in batches as a kind of technology of producing complex-shaped, near clean shape structural member.At present, oxide ceramics shell titanium and titanium aluminium base alloy melted module precise casting technology are mainly adopted in titanium and titanium aluminium base alloy precision-investment casting, have produced the titanium and the titanium aluminium base alloy precision castings product of multiple thin-walled, complexity for national defence, civil area.Yet titanium aluminium base alloy is as a kind of intermetallic compound, and its coagulating property is different from general alloy, in the smart casting process of titanium aluminium base alloy, because foundry goods self structure characteristics make foundry goods when linear shrinkage, is subjected to the resistance from shell, forms hindered contraction.Hindered contraction is the main cause that foundry goods produces defectives such as distortion, hot tearing, internal stress and cold cracking.For titanium aluminium base alloy, adding aluminium in titanium can make its shrinkage factor increase, be easy in process of setting, produce big shrinkage cavity and concentrated shrinkage porosite, if foundry goods its contraction after casting is obstructed, the resistance that is subjected to shell is greater than its limiting range of stress that can bear, will cause the generation of crackle in the foundry goods so, finally cause in shrinkage porosite and shrinkage cavity place fracture.Silicasol case gas permeability and collapsibility are poor, and residual strength is big, usually cause the titanium aluminium base alloy foundry goods of thin-walled to crack in the solidification shrinkage process and scrap.
Summary of the invention
For the problem that the residual strength that solves existing cast titanium acieral shell greatly, easily causes the titanium aluminium base alloy foundry goods of thin-walled to crack, the invention provides a kind of preparation method of cast titanium aluminum base alloy porous ceramic mould shell in the solidification shrinkage process.
The preparation method of cast titanium aluminum base alloy porous ceramic mould shell, concrete steps are:
Step 1: the wax-pattern compacting, wax material is pressed down the shape wax-pattern of laminating in the condition of 50～60 ℃ of temperature, clean, dry with cleaning agent of wax mould then.
Step 2: the shell surface layer is coated with extension: the outer surface at wax-pattern is coated with extension four stratotype shell surface layers, the manufacturing process of each stratotype shell surface layer is: be coated with extension, stucco, drying, the wherein said extension that is coated with is wax-pattern to be immersed in the investment precoat that flow cup viscosity is 80～100s take out after 3～5 seconds, when the coating on the wax-pattern flows evenly and no longer continuously following the time, carry out stucco; What described stucco was used is the oxidation zircon sand of granularity between 100 orders～150 orders; Described drying is to be under 60%～65% the room temperature dry 8～24 hours in humidity with the wax-pattern after the stucco, guarantees fully dry and sclerosis, and then descends the extension that is coated with of one deck;
Step 3: the shell transition zone be coated with extension: be coated with at the outer surface that is coated with the wax-pattern of having hung surface layer and hang two-layer transition zone, the extension process that is coated with of each layer is identical with the described process of step 2, and difference has: what be coated with the use of extension process is that flow cup viscosity is the backing layer coating of 60～90s; The granularity that stucco is used is 50 orders～70 purpose bauxite sand, and the dry time is 8～32 hours;
Step 4: the shell back-up coat be coated with extension: be coated with and hang 4～8 layers back-up coat being coated with the wax-pattern outer surface of having hung transition zone, the extension process that is coated with of each layer is identical with the described process of step 3, and what difference was the stucco use is that granularity is 30 orders～40 purpose bauxite sand;
Step 5: the outer field extension that is coated with of shell: be coated with again and hang one deck outer layer coating being coated with the wax-pattern outer surface of having hung back-up coat, the wax-pattern of will be coated with having hung back-up coat immerses in the outer layer coating that flow cup viscosity is 10～20s and takes out after 3～5 seconds, is under 60%～65% the room temperature dry 24～32 hours in humidity then;
Step 6: the dewaxing of shell: adopt the high steam dewaxing technique, steam pressure is 4～10kg/cm
2, the dewaxing time is 5～20 minutes;
Step 7: shell roasting: the shell afterwards that will dewax is put into chamber type electric resistance furnace, is warming up to 200 ℃ of insulations 1 hour with stove, is warming up to 400 ℃ then and is incubated 1 hour down, is warming up to 1150 ℃ then and is incubated 2 hours down, and is last, cools off with stove.
Use the cast titanium aluminum base alloy porous ceramic mould shell that method of the present invention is made, good permeability, reduced shell residual strength, improved the collapsibility of shell, improved the quality of titanium aluminium base alloy precision-investment casting, the present invention is particularly useful for making the porous ceramic mould shell of thickness less than the titanium aluminium base alloy of 1mm.
The present invention can be widely applied in the manufacturing of national defence, civilian titanium and titanium aluminium base alloy casting shell molds.
Description of drawings:
The I-shaped porous ceramic mould shell that Fig. 1 is to use method of the present invention to make; Fig. 2 is to use the I-shaped foundry goods of titanium aluminium base alloy of I-shaped porous ceramic mould shell casting shown in Figure 1.
The specific embodiment
The specific embodiment one: the preparation method of the cast titanium aluminum base alloy porous ceramic mould shell of present embodiment is:
Step 1: the wax-pattern compacting, wax material is pressed down the shape wax-pattern of laminating in the condition of 50～60 ℃ of temperature, clean, dry with cleaning agent of wax mould then.
Step 2: the shell surface layer is coated with extension: the outer surface at wax-pattern is coated with extension four stratotype shell surface layers, the manufacturing process of each stratotype shell surface layer is: be coated with extension, stucco, drying, the wherein said extension that is coated with is wax-pattern to be immersed in the investment precoat that flow cup viscosity is 80～100s take out after 3～5 seconds, when the coating on the wax-pattern flows evenly and no longer continuously following the time, carry out stucco, it is even, comprehensive that stucco is wanted; What described stucco was used is the oxidation zircon sand of granularity between 100 orders～150 orders, and it is even, comprehensive that stucco is wanted; Described drying is to be under 60%～65% the room temperature dry 8～24 hours in humidity with the wax-pattern after the stucco, guarantees fully dry and sclerosis, and then descends the extension that is coated with of one deck;
Step 3: the shell transition zone be coated with extension: be coated with at the outer surface that is coated with the wax-pattern of having hung surface layer and hang two-layer transition zone, the extension process that is coated with of each layer is identical with the described process of step 2, and difference has: what be coated with that the extension process uses is the backing layer coating of flow cup viscosity as 60s～90s; The granularity that stucco is used is 50 orders～70 purpose bauxite sand, and the dry time is 8～32 hours, contains high polymer and water emulsion in the described backing layer coating;
Step 4: the shell back-up coat be coated with extension: be coated with and hang 4～8 layers back-up coat being coated with the wax-pattern outer surface of having hung transition zone, the extension process that is coated with of each layer is identical with the described process of step 3, and what difference was the stucco use is that granularity is 30 orders～40 purpose bauxite sand;
Step 5: the outer field extension that is coated with of shell: be coated with again and hang one deck skin being coated with the wax-pattern outer surface of having hung back-up coat, to immerse flow cup viscosity be to take out after 3～5 seconds in 10～20 seconds the outer layer coating with being coated with the wax-pattern of having hung back-up coat, is under 60%～65% the room temperature dry 24～32 hours in humidity then;
Step 6: the dewaxing of shell: adopt the high steam dewaxing technique, steam pressure is 4～10kg/cm
2, the dewaxing time is 5～20 minutes;
Step 7: shell roasting: the shell afterwards that will dewax is put into chamber type electric resistance furnace, is warming up to 200 ℃ of insulations 1 hour with stove, is warming up to 400 ℃ then and is incubated 1 hour down, is warming up to 1150 ℃ then and is incubated 2 hours down, and is last, cools off with stove.
Should meet the following conditions at the wax material described in the step 1: freezing point is 60/ ℃～62/ ℃, and linear shrinkage is 0.4/%～0.6/%, and needle penetration is 11/1/10mm, pusey-Jones indentation hardness is 19, tensile strength is 2.91/MPa, and the binding agent angle of wetting is 79/ °～82/ °, and density is 0.95/g/mm
3～1/g/mm
3, ash content is 0.05/%.
Stucco in step 2 can adopt the machine stucco also can adopt manual stucco.
At the high polymer described in the step 3 and the water emulsion mixture that to be high polymer and water emulsion mix with 1: 1 mass ratio.
In step 7, the shell after the dewaxing is placed on 200 ℃ is incubated 1 hour down, can fully remove the low melting point volatile matter in the shell, as moisture, remaining wax material etc.
The temperature of the room temperature described in this method is between 22 ℃～24 ℃.
The viscosity of described coating adopts coating-4 viscosity meter to measure.
Contain high polymer and water emulsion in the backing layer coating in the present embodiment, high polymer after the bonding and water emulsion at high temperature can be burnt to be lost, make the transition zone and the back-up coat of shell when roasting, form evenly tiny hole, thereby reduced the residual strength of shell, reached the purpose of improving the shell deformability, reducing casting crack.
After tested, use is added with the shell of the backing layer coating making of high polymer and water emulsion, and its shell residual strength is 5.06MPa, uses the shell of the backing layer coating making of not adding high polymer and water emulsion, its shell residual strength is 6.47Mpa, and the shell residual strength obviously reduces.
The shell cast titanium acieral parts that adopt this method to make, adopt German Linn V-3, the centrifugal titanium casting machine of 3-TITAN high frequency carries out spun casting, at centrifugal rotational speed is 300～500rpm, under the condition that the shell preheat temperature is 200～400 ℃, watering the Ti and the TiAl base alloy sample that cast out does not have crackle.Fig. 1 is " worker " font shell that adopts the technology making of present embodiment, and Fig. 2 is TiAl base alloy " worker " the font foundry goods that adopts the shell making of Fig. 1.
The specific embodiment two: the preparation method's of present embodiment and the specific embodiment one described cast titanium aluminum base alloy porous ceramic mould shell difference is, at the investment precoat described in the step 2 by zirconia (ZrO
2) powder, zirconium colloidal sol, defoamer n-octyl alcohol and wetting agent jfc form, zirconia (ZrO wherein
2) the powder liquor ratio of powder and zirconium colloidal sol is 3.8g/1ml, the granularity of described Zirconium oxide powder is 150 orders～325 orders, the mass percent that the defoamer n-octyl alcohol accounts for zirconium colloidal sol is 0.3wt%～0.06wt%, and the mass percent that wetting agent jfc accounts for zirconium colloidal sol is 0.2wt%～0.4wt%.
The preparation method of described investment precoat is: with concentration is that 24% zirconium colloidal sol adds in the mixing drum and stirs, when stirring, add defoamer n-octyl alcohol and wetting agent jfc, after being stirred to glue, the jelly that has stirred transferred in the L type agitator stir, add zirconia (ZrO in the time of stirring gradually
2) powder, continuous stirring is more than 45 minutes, to eliminate the gas in the coating, leaves standstill 6～10 hours under humidity is 60%～65% room temperature then.
The specific embodiment three: the preparation method's of present embodiment and the specific embodiment two described cast titanium aluminum base alloy porous ceramic mould shells difference is, described zirconia (ZrO
2) granularity of powder is 150 orders～250 orders.
The specific embodiment four: the preparation method's of present embodiment and the specific embodiment two described cast titanium aluminum base alloy porous ceramic mould shells difference is, described zirconia (ZrO
2) granularity 250 orders～300 orders of powder.
The specific embodiment five: the preparation method's of present embodiment and the specific embodiment two described cast titanium aluminum base alloy porous ceramic mould shells difference is, described zirconia (ZrO
2) granularity 300 orders～325 orders of powder.
The specific embodiment six: the preparation method's of present embodiment and the specific embodiment one described cast titanium aluminum base alloy porous ceramic mould shell difference is, at the backing layer coating described in the step 3 is by Ludox, aluminium vanadine powder, high polymer and water emulsion, wetting agent jfc and defoamer n-octyl alcohol are formed, wherein the granularity of bauxite powder is 250 orders～400 orders, the powder liquor ratio of described bauxite powder and Ludox is 2g/ml～3.5g/ml, the mass percent that high polymer and water emulsion account for Ludox is 0.01wt%～0.04wt%, the mass percent that wetting agent jfc accounts for Ludox is 2wt%～6wt%, and the mass percent that the defoamer n-octyl alcohol accounts for Ludox is 0.02wt%～0.05wt%.
The preparation method of described backing layer coating is:
Step 3 one: with concentration is to stir in 15%～35% Ludox adding mixing drum, slowly adds high polymer and water emulsion simultaneously, guarantees that the micelle of Ludox is blended, and stirs into glue;
Step 3 two: step 3 one is stirred the jelly of finishing put in the L type agitator and stir, add defoamer n-octyl alcohol, wetting agent jfc and bauxite powder gradually simultaneously, stir then more than 3 hours;
Step 3 three: be to leave standstill 6～10 hours under 60%～65% the room temperature in humidity, guarantee that the surperficial complete wetting and the gas of refractory powder bauxite is all overflowed.
In step 3 one, can adopt the speed of 80r/min～90r/min to stir.
In step 3 two, can adopt the speed of 35r/min～40r/min to stir.
The specific embodiment seven: the preparation method's of present embodiment and the specific embodiment six described cast titanium aluminum base alloy porous ceramic mould shells difference is that the mass percent that described high polymer and water emulsion account for Ludox is 0.01wt%～0.02wt%.
The specific embodiment eight: the preparation method's of present embodiment and the specific embodiment six described cast titanium aluminum base alloy porous ceramic mould shells difference is that the mass percent that described high polymer and water emulsion account for Ludox is 0.02wt%～0.03wt%.
The specific embodiment nine: the preparation method's of present embodiment and the specific embodiment six described cast titanium aluminum base alloy porous ceramic mould shells difference is that the mass percent that described high polymer and water emulsion account for Ludox is 0.03wt%～0.04wt%.
The specific embodiment ten: the preparation method's of present embodiment and the specific embodiment six described cast titanium aluminum base alloy porous ceramic mould shells difference is that the mass percent that described wetting agent (JFC) accounts for Ludox is 0.2wt%～0.3wt%.
The specific embodiment 11: the preparation method's of present embodiment and the specific embodiment six described cast titanium aluminum base alloy porous ceramic mould shells difference is that the mass percent that described wetting agent (JFC) accounts for Ludox is 0.3wt%～0.4wt%.
The specific embodiment 12: the preparation method's of present embodiment and the specific embodiment six described cast titanium aluminum base alloy porous ceramic mould shells difference is that the mass percent that described wetting agent (JFC) accounts for Ludox is 0.4wt%～0.6wt%.
The specific embodiment 13: the preparation method's of present embodiment and the specific embodiment six described cast titanium aluminum base alloy porous ceramic mould shells difference is that the mass percent that described defoamer n-octyl alcohol accounts for Ludox is 0.02wt%～0.04wt%.
The specific embodiment 14: the preparation method's of present embodiment and the specific embodiment six described cast titanium aluminum base alloy porous ceramic mould shells difference is that the mass percent that described defoamer n-octyl alcohol accounts for Ludox is 0.04wt%～0.05wt%.
The specific embodiment 15: the preparation method's of present embodiment and the specific embodiment one described cast titanium aluminum base alloy porous ceramic mould shell difference is that in step 2, what stucco was used is that granularity is at 100 orders～115 purpose oxidation zircon sand.
The specific embodiment 16: the preparation method's of present embodiment and the specific embodiment one described cast titanium aluminum base alloy porous ceramic mould shell difference is that in step 2, what stucco was used is that granularity is at 115 orders～135 purpose oxidation zircon sand.
The specific embodiment 17: the preparation method's of present embodiment and the specific embodiment one described cast titanium aluminum base alloy porous ceramic mould shell difference is that in step 2, be 8～16 hours drying time.
The specific embodiment 18: the preparation method's of present embodiment and the specific embodiment one described cast titanium aluminum base alloy porous ceramic mould shell difference is that in step 3, what stucco was used is that granularity is 60 purpose bauxite sand.
The specific embodiment 19: the preparation method's of present embodiment and the specific embodiment one described cast titanium aluminum base alloy porous ceramic mould shell difference is that in step 3, the dry time is 8～16 hours.
The specific embodiment 20: the preparation method's of present embodiment and the specific embodiment one described cast titanium aluminum base alloy porous ceramic mould shell difference is that in step 3, the dry time is 16～24 hours.
The specific embodiment 21: the preparation method's of present embodiment and the specific embodiment one described cast titanium aluminum base alloy porous ceramic mould shell difference is that in step 3, the dry time is 24～32 hours.
The specific embodiment 22: the preparation method's of present embodiment and the specific embodiment one described cast titanium aluminum base alloy porous ceramic mould shell difference is, being coated with in the extension of the shell back-up coat of step 4, being coated with and hanging 4 or 5 or 6 or 7 or 8 layers back-up coat.
The specific embodiment 23: the preparation method's of present embodiment and the specific embodiment one described cast titanium aluminum base alloy porous ceramic mould shell difference is that in step 4, what stucco was used is that granularity is 30 purpose bauxite sand.
The specific embodiment 24: the preparation method's of present embodiment and the specific embodiment one described cast titanium aluminum base alloy porous ceramic mould shell difference is, is coated with in the extension in that the shell of step 5 is outer field, and be 24 hours～28 hours drying time.
The specific embodiment 25: the preparation method's of present embodiment and the specific embodiment one described cast titanium aluminum base alloy porous ceramic mould shell difference is that in the shell dewaxing of step 6, described steam pressure is 4kg/cm
2～7kg/cm
2
The specific embodiment 26: the preparation method's of present embodiment and the specific embodiment one described cast titanium aluminum base alloy porous ceramic mould shell difference is that in the shell dewaxing of step 6, described steam pressure is 7～10kg/cm
2
Claims (9)
1, the preparation method of cast titanium aluminum base alloy porous ceramic mould shell is characterized in that its method is:
Step 1: the wax-pattern compacting, wax material is pressed down the shape wax-pattern of laminating in the condition of 50～60 ℃ of temperature, clean, dry with cleaning agent of wax mould then;
Step 2: the shell surface layer is coated with extension: the outer surface at wax-pattern is coated with extension four stratotype shell surface layers, the manufacturing process of each stratotype shell surface layer is: be coated with extension, stucco, drying, the wherein said extension that is coated with is wax-pattern to be immersed in the investment precoat that flow cup viscosity is 80～100s take out after 3～5 seconds, when the coating on the wax-pattern flows evenly and no longer continuously following the time, carry out stucco, it is even, comprehensive that stucco is wanted; What described stucco was used is the oxidation zircon sand of granularity between 100 orders～150 orders, and it is even, comprehensive that stucco is wanted; Described drying is to be under 60%～65% the room temperature dry 8～24 hours in humidity with the wax-pattern after the stucco, guarantees fully dry and sclerosis, and then descends the extension that is coated with of one deck;
Step 3: the shell transition zone be coated with extension: be coated with and hang two-layer transition zone being coated with the outer surface of having hung the surface layer wax-pattern, the extension process that is coated with of each layer is identical with the described process of step 2, and difference has: what be coated with that the extension process uses is the backing layer coating of flow cup viscosity as 60s～90s; The granularity that stucco is used is 50 orders～70 purpose bauxite sand, and the dry time is 8～32 hours, contains high polymer and water emulsion in the described backing layer coating;
Step 4: the shell back-up coat be coated with extension: be coated with and hang 4～8 layers back-up coat being coated with the wax-pattern outer surface of having hung transition zone, the extension process that is coated with of each layer is identical with the described process of step 3, and what difference was the stucco use is that granularity is 30 orders～40 purpose bauxite sand;
Step 5: the outer field extension that is coated with of shell: be coated with again and hang one deck skin being coated with the wax-pattern outer surface of having hung back-up coat, to immerse flow cup viscosity be to take out after 3～5 seconds in 10～20 seconds the outer layer coating with being coated with the wax-pattern of having hung back-up coat, is under 60%～65% the room temperature dry 24～32 hours in humidity then;
Step 6: the dewaxing of shell: adopt the high steam dewaxing technique, steam pressure is 4～10kg/cm
2, the dewaxing time is 5～20 minutes;
Step 7: shell roasting: the shell afterwards that will dewax is put into chamber type electric resistance furnace, is warming up to 200 ℃ of insulations 1 hour with stove, is warming up to 400 ℃ then and is incubated 1 hour down, is warming up to 1150 ℃ then and is incubated 2 hours down, and is last, cools off with stove.
2, the preparation method of cast titanium aluminum base alloy porous ceramic mould shell according to claim 1, it is characterized in that should meeting the following conditions at the wax material described in the step 1: freezing point is 60 ℃～62 ℃, linear shrinkage is 0.4%～0.6%, needle penetration is 11, the unit of described needle penetration is 1/10mm, and pusey-Jones indentation hardness is 19, and tensile strength is 2.91MPa, the binding agent angle of wetting is 79 °～82 °, and density is 0.95g/mm
3～1g/mm
3, ash content is 0.05%.
3, the preparation method of cast titanium aluminum base alloy porous ceramic mould shell according to claim 1, it is characterized in that, form by Zirconium oxide powder, zirconium colloidal sol, defoamer n-octyl alcohol and wetting agent jfc at the investment precoat described in the step 2, wherein the ratio of Zirconium oxide powder and zirconium colloidal sol is 3.8g/1ml, the granularity of described Zirconium oxide powder is 150 orders～325 orders, the mass percent of defoamer n-octyl alcohol is 0.03wt%～0.06wt%, and the mass percent of wetting agent jfc is 0.02wt%～0.04wt%.
4, the preparation method of cast titanium aluminum base alloy porous ceramic mould shell according to claim 1, it is characterized in that, at the backing layer coating described in the step 3 is by Ludox, aluminium vanadine powder, high polymer and water emulsion, wetting agent jfc and defoamer n-octyl alcohol are formed, wherein the granularity of bauxite powder is 250 orders～400 orders, the powder liquor ratio of described bauxite powder and Ludox is 2g/ml～3.5g/ml, the mass percent of high polymer and water emulsion is 0.01wt%～0.04wt%, the mass percent of wetting agent jfc is 0.02wt%～0.06wt%, and the mass percent of defoamer n-octyl alcohol is 0.02wt%～0.05wt%.
5, the preparation method of cast titanium aluminum base alloy porous ceramic mould shell according to claim 1 is characterized in that, in step 2, what stucco was used is that granularity is at 100 orders～115 purpose oxidation zircon sand.
6, the preparation method of cast titanium aluminum base alloy porous ceramic mould shell according to claim 1 is characterized in that, in step 2, what stucco was used is that granularity is at 115 orders～135 purpose oxidation zircon sand.
7, the preparation method of cast titanium aluminum base alloy porous ceramic mould shell according to claim 1 is characterized in that, in step 2, what stucco was used is that granularity is at 135 orders～150 purpose oxidation zircon sand.
8, the preparation method of cast titanium aluminum base alloy porous ceramic mould shell according to claim 1 is characterized in that, in the shell dewaxing of step 6, described steam pressure is 4kg/cm
2～7kg/cm
2
9, the preparation method of cast titanium aluminum base alloy porous ceramic mould shell according to claim 1 is characterized in that, in the shell dewaxing of step 6, described steam pressure is 7～10kg/cm
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100726013A CN100528403C (en) | 2007-08-02 | 2007-08-02 | Method for preparing casting titanium and titanium-aluminum base alloy porous ceramic mould shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100726013A CN100528403C (en) | 2007-08-02 | 2007-08-02 | Method for preparing casting titanium and titanium-aluminum base alloy porous ceramic mould shell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101104195A CN101104195A (en) | 2008-01-16 |
| CN100528403C true CN100528403C (en) | 2009-08-19 |
Family
ID=38998390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100726013A Expired - Fee Related CN100528403C (en) | 2007-08-02 | 2007-08-02 | Method for preparing casting titanium and titanium-aluminum base alloy porous ceramic mould shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100528403C (en) |
Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101590513B (en) * | 2009-07-03 | 2011-04-27 | 郑州神牛铸造有限公司 | Method for precise composite casting evaporative pattern |
| CN101811174B (en) * | 2010-04-30 | 2011-11-23 | 哈尔滨工业大学 | A method for preparing a surface shell for high-temperature titanium alloy investment casting |
| CN101947640B (en) * | 2010-11-03 | 2013-07-24 | 西安泵阀总厂有限公司 | Method for preparing zirconium and zirconium alloy investment precision casting oxide ceramic molding shell |
| CN102266905A (en) * | 2011-07-08 | 2011-12-07 | 山东泰山钢铁集团有限公司 | Manufacturing process of part shell with location hole |
| CN102836963B (en) * | 2012-09-09 | 2015-02-25 | 安徽厚林精密金属科技有限公司 | Support casting process |
| CN103071764B (en) * | 2012-11-30 | 2016-03-30 | 上海大学 | For the CaZrO of titanium or titanium alloy hot investment casting 3the preparation method of shell |
| CN103008549A (en) * | 2013-01-21 | 2013-04-03 | 贵州红林机械有限公司 | Method for manufacturing investment pattern shell with narrow and curved cavity of casting |
| CN103128227B (en) * | 2013-03-07 | 2015-04-01 | 上海交通大学 | Method for manufacturing shell surface layer formed by stainless steel precision casting |
| CN104162634A (en) * | 2013-08-25 | 2014-11-26 | 浙江天瑞钢业有限公司 | Casting method of narrow-tunnel wide-tunnel wall surface casting |
| CN103537620A (en) * | 2013-09-30 | 2014-01-29 | 中国航空工业集团公司北京航空材料研究院 | Preparation method for precision casting of mold shell through directional solidification investment casting of titanium-aluminum based alloy |
| CN103611885B (en) * | 2013-11-26 | 2015-06-17 | 洛阳鹏起实业有限公司 | Method and device for dewaxing investment precision casting shell and flash burning dewaxing furnace |
| CN103658537B (en) * | 2014-01-06 | 2015-12-02 | 安徽厚林精密金属科技有限公司 | A kind of formwork preparation method of casting cutter with 4Cr13 |
| CN103920851B (en) * | 2014-03-04 | 2016-08-17 | 清华大学 | A kind of method changing investment shell intensity by dipping organic binder bond |
| CN104001856B (en) * | 2014-05-30 | 2016-07-13 | 张勇弢 | The titanium alloy precision casting preparation method of oxide ceramics composite shell |
| CN104607591B (en) * | 2015-01-16 | 2017-06-30 | 青岛新诺科铸造材料科技有限公司 | A kind of rapidly-dried silica sol |
| CN105499499B (en) * | 2015-12-08 | 2017-10-03 | 中国航空工业集团公司北京航空材料研究院 | A kind of Ti-Al series metal compounds casting method for precisely forming |
| CN105903901B (en) * | 2016-05-13 | 2018-09-07 | 上海万泽精密铸造有限公司 | A kind of nearly zero-shrinkage shell and preparation method thereof based on vitreous silica |
| CN106493287B (en) * | 2016-11-28 | 2019-02-01 | 上海航天精密机械研究所 | The casting preparation method of yttrium oxide shell |
| CN107497999A (en) * | 2017-09-01 | 2017-12-22 | 东风精密铸造安徽有限公司 | A kind of titanium investment pattern precision casting process |
| CN108080570B (en) * | 2017-12-23 | 2020-02-04 | 石家庄盛华企业集团有限公司 | Middle seal sand filling process for preventing inner leakage in investment casting |
| CN108838333A (en) * | 2018-06-19 | 2018-11-20 | 霍山县忠福机电科技有限公司 | A kind of Improving Shell Making with Silica Sol |
| CN110976769A (en) * | 2019-12-24 | 2020-04-10 | 十堰市金海丰精密铸造有限公司 | Method for manufacturing mould shell of alloy precision casting |
| CN111151711A (en) * | 2019-12-29 | 2020-05-15 | 芜湖市努尔航空信息科技有限公司 | Production method of investment pattern aviation casting |
| CN116575004B (en) * | 2023-07-10 | 2023-10-03 | 海朴精密材料(苏州)有限责任公司 | Multi-principal element alloy target material and preparation method and application thereof |
-
2007
- 2007-08-02 CN CNB2007100726013A patent/CN100528403C/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 钛熔模精铸用氧化物陶瓷型壳制壳工艺的研究. 陈玉勇等.材料工程，第8期. 1999 |
| 钛熔模精铸用氧化物陶瓷型壳制壳工艺的研究. 陈玉勇等.材料工程，第8期. 1999 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101104195A (en) | 2008-01-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100528403C (en) | Method for preparing casting titanium and titanium-aluminum base alloy porous ceramic mould shell | |
| CN105499499B (en) | A kind of Ti-Al series metal compounds casting method for precisely forming | |
| CN100455377C (en) | Back coating of cast titanium-aluminum-based alloy ceramic shell and preparation method thereof | |
| CN1255233C (en) | Preparing method of low-cost oxide ceramic shell for titanium alloy precision casting | |
| CN102873273B (en) | A preparation method of oxide ceramic shell for improving the surface properties of TiAl alloy castings | |
| CN100577324C (en) | Casting method for heavy combustion engine II-stage diverter blade | |
| CN110465625B (en) | Preparation method of ceramic shell for improving physical sand adhesion of high-temperature alloy directional solidification casting | |
| CN103639359B (en) | A kind of preparation method based on composite fibre enhancing precision investment casting mould case | |
| CN106734853B (en) | A kind of preparation method of nickel base superalloy monocrystalline/directional solidification ceramic shell | |
| Yuan et al. | The influence of polymer content and sintering temperature on yttria face-coat moulds for TiAl casting | |
| CN105057593B (en) | A kind of copper-alloy casting full form casting process | |
| CN102284678A (en) | Method for preparing formwork of precisely-cast titanium alloy | |
| CN113996759B (en) | Aluminum lithium alloy casting adopting shell to inhibit interface reaction and casting method thereof | |
| CN110340279A (en) | Heavy castings casting method | |
| Venkat et al. | Ceramic shell moulds for investment casting of low-pressure turbine rotor blisk | |
| Venkat et al. | Ceramic shell moulds with zircon filler and colloidal silica binder for investment casting of shrouded low-pressure turbine blades | |
| CN102744366A (en) | Preparation method of titanium aluminium-based and niobium silicon-based alloy directional solidification investment precision casting mold shell | |
| CN102962401A (en) | A kind of SrZrO3 shell for precision casting of titanium and titanium alloy and its preparation method | |
| CN100497246C (en) | Method for manufacturing casing of heavy combustion engine II-stage diverter blade | |
| CN107186172B (en) | A kind of coating and hanging method of titanium-based alloy investment casting shell back layer | |
| CN114074177B (en) | A preparation method of investment casting mold shell for brittle materials | |
| CN109317613A (en) | A kind of shell preparation method to prevent bending deformation of directional test rod | |
| JP7504100B2 (en) | Improved foundry slurry for shell mold manufacturing | |
| JP2005349472A (en) | Lost wax casting method using contact layer | |
| CN116099985A (en) | A kind of forming method of titanium series high entropy alloy casting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090819 Termination date: 20100802 |