CN102151787A - 600-DEG C high-temperature titanium alloy fired mold casting type shell surface painting and preparation method thereof - Google Patents
600-DEG C high-temperature titanium alloy fired mold casting type shell surface painting and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a 600-DEG C high-temperature titanium alloy fired mold casting type shell surface painting and a preparation method thereof and relates to a titanium alloy fired mold casting type shell surface painting and a preparation method thereof. The invention solves the technical problem of gross cast structures when a shell prepared by a current common fired mold casting technique is used for casting high-temperature titanium alloy. The 600-DEG C high-temperature titanium alloy fired mold casting type shell surface painting is prepared by fireproof powder, binder, wetting agent, defoamer, dispersing agent, and refiner, wherein the fireproof powder relates to alumina, zirconium oxide, yttrium oxide or calcium oxide; the binder relates to diacetatozirconic acid, ammonium zirconium carbonate, silicon sol or yttrium sol; and the refiner relates to one from carbon powder, boron powder and boron carbide or combination thereof. After the refiner is mixed with the fireproof powder, then the mixture together with the binder is added into a stirring machine to mix; and finally, the wetting agent, the defoamer and the dispersing agent are added and mixed. The shell surface painting can refine surface structures, and can be used in the field of titanium alloy casting.
Description
Technical field
The present invention relates to investment precoat of titanium alloy shell and preparation method thereof.
Background technology
High-temperature titanium alloy is owing to specific strength height, good comprehensive performances such as corrosion-resistant, heat-resisting and structure high efficiency are widely used in aviation field, is used for making high important spare part and the aircraft body structure spare with good heat resistance of desired strength in the aero-engine more.Because high-temperature titanium alloy has higher serviceability temperature, elevated temperature strength, good oxidization resistance energy, creep-resistant property, anti-fatigue performance etc., in the used high-temperature structural material of new generation of aircraft engine and rocket propulsion system, enjoy the material supplier authors' of aerospace community attention, become one of the research direction of high-temperature structural material of new generation and development trend with remarkable advantages.At present, 600 ℃ of high-temperature titanium alloys of research mostly are the distortion high-temperature titanium alloys both at home and abroad, mostly are Ti-Al-Sn-Zr-Mo-Si system, and carry out the interpolation (as rare earth) of multielement on this basis, composition is diversification more, and this class alloy generally is to use with the form of ingot casting, forging stock, sheet material.Adopt full form casting process to have the characteristics of near-net-shape, technology is simple, and stock utilization height, production cost are low, are particularly suited for producing in batches and complex-shaped alloy part.Adopt the shell cast high-temperature titanium alloy of common full form casting process preparation, the cast back is because cooling is slow, foundry goods tends to form thick grain structure, influence the mechanical property of foundry goods, particularly high and low all fatigue and percentage elongation there is considerable influence, for improving the thick cast sturcture of titanium alloy, general employing interpolation grain refiner goes bad and handles or extraordinary heat-treating methods.But concerning the casting high-temperature titanium alloy of high-alloying, high alloying has suppressed the effect of alterant, and rotten processing is difficult to obtain effect, and adopts extraordinary heat treatment meeting to increase cost and production cycle greatly.As 600 ℃ of high-temperature titanium alloys with space flight and aviation application background, the refinement of as-cast structure, the particularly refinement of top layer as-cast structure have more the raising of its serviceability and have significant practical applications.
Summary of the invention
The present invention will solve the shell of the common full form casting process preparation of existing usefulness thick technical problem of as-cast structure when the cast high-temperature titanium alloy, and 600 ℃ of high-temperature titanium alloy investment casting shell investment precoats and preparation method thereof are provided.
600 ℃ of high-temperature titanium alloy investment casting shell investment precoats of the present invention are by refractory powder, binding agent, wetting agent, defoamer, dispersant and particle diameter are that the fining agent of 1 μ m～20 μ m is made, wherein the mass ratio of binding agent and refractory powder is 1: 1.6～4, the quality of wetting agent is 0.05%～0.5% of a binding agent quality, the quality of defoamer is 0.1%～0.6% of a binding agent quality, the quality of dispersant is 0.5%～3% of a binding agent quality, the quality of fining agent is 1%～20% of a refractory powder quality, refractory powder is an aluminium oxide, zirconia, yittrium oxide or calcium oxide, binding agent is two acetic acid zirconiums, zirconium carbonate ammonium, Ludox or yttrium colloidal sol, fining agent is a carbon dust, the combination of one or more in boron powder and the boron carbide powder.
The preparation method of 600 ℃ of high-temperature titanium alloy investment casting shell investment precoats of the present invention carries out according to the following steps: one, take by weighing refractory powder, binding agent, wetting agent, defoamer, dispersant and particle diameter are the fining agent of 1 μ m～20 μ m, wherein the mass ratio of binding agent and refractory powder is 1: 1.6～4, the quality of wetting agent is 0.05%～0.5% of a binding agent quality, the quality of defoamer is 0.1%～0.6% of a binding agent quality, the quality of dispersant is 0.5%～3% of a binding agent quality, the quality of fining agent is 1%～20% of a refractory powder quality, refractory powder is for being aluminium oxide, zirconia, yittrium oxide or calcium oxide, binding agent is two acetic acid zirconiums, zirconium carbonate ammonium, Ludox or yttrium colloidal sol, fining agent is a carbon dust, the combination of one or more in boron powder and the boron carbide powder; Two, the fining agent that step 1 is taken by weighing joins with refractory powder and mixes 3h～5h in the mixer, obtains mixed powder; Three, stir 3h～8h in the binding agent adding L type mould wash mixer that mixed powder that step 2 is prepared and step 1 take by weighing, and then the wetting agent that step 1 is taken by weighing, defoamer, dispersant add in the mould wash mixer, continue 12h～48h, obtain 600 ℃ of high-temperature titanium alloy investment casting shell investment precoats.
600 ℃ of high-temperature titanium alloy investment casting shells of the present invention investment precoat adopts carbon dust, boron powder, boron carbide powder or wherein several combination are as fining agent, investment precoat flow cup viscosity is 20s～40s (4# Zhan Shi cup), when model casting, utilize the reaction between fining agent and melts of titanium alloy, separate out TiB or TiC at crystal boundary, thereby reach the effect of crystal grain thinning.Utilize the shell of this investment precoat preparation, behind the cast high-temperature titanium alloy, can refined cast structure, particularly textura epidermoidea, improved the intensity and the anti-fatigue performance of alloy.
600 ℃ of high-temperature titanium alloy investment casting shell investment precoats of the present invention can be used for the Ti alloy casting field, can cast following several titanium alloy:
Ti-1100(Ti-6Al-2.75Sn-4Zr-0.4Mo-0.45Si)、
IMI834(Ti-5.8Al-4Sn-3.5Zr-0.7Nb-0.5M-0.135Si)、
BT36 (Ti-6.2A1-2Sn-3.6Zr-0.7Mo-0.1Y-5.0W-0.15Si) and
Ti60(Ti-5.8Al-4.8Sn-2.0Zr-1.0Mo-0.135Si-0.85Nd)。
Description of drawings
Fig. 1 is with the as-cast microstructure photo of the Ti-1100 high-temperature titanium alloy of common shell casting in the specific embodiment 33; It in Fig. 2 specific embodiment 33 as-cast microstructure photo with the Ti-1100 high-temperature titanium alloy of 600 ℃ of high-temperature titanium alloy investment casting shells castings of the specific embodiment 33 preparation.
The specific embodiment
The specific embodiment one: 600 ℃ of high-temperature titanium alloy investment casting shell investment precoats of present embodiment are by refractory powder, binding agent, wetting agent, defoamer, dispersant and particle diameter are that the fining agent of 1 μ m～20 μ m is made, wherein the mass ratio of binding agent and refractory powder is 1: 1.6～4, the quality of wetting agent is 0.05%～0.5% of a binding agent quality, the quality of defoamer is 0.1%～0.6% of a binding agent quality, the quality of dispersant is 0.5%～3% of a binding agent quality, the quality of fining agent is 1%～20% of a refractory powder quality, refractory powder is an aluminium oxide, zirconia, yittrium oxide or calcium oxide, binding agent is two acetic acid zirconiums, zirconium carbonate ammonium, Ludox or yttrium colloidal sol, fining agent is a carbon dust, the combination of one or more in boron powder and the boron carbide powder.
600 ℃ of high-temperature titanium alloy investment casting shells of present embodiment investment precoat adopts carbon dust, a kind of or wherein several combination in boron powder, the boron carbide powder is as fining agent, investment precoat flow cup viscosity is 20s～40s (4# Zhan Shi cup), when model casting, utilize the reaction between fining agent and melts of titanium alloy, separate out TiB or TiC at crystal boundary, thereby reach the effect of crystal grain thinning.Utilize the shell of this investment precoat preparation, behind the cast high-temperature titanium alloy, can refined cast structure, particularly textura epidermoidea, improved intensity, non-oxidizability and the anti-fatigue performance of alloy.
The specific embodiment two: what present embodiment and the specific embodiment one were different is: the particle diameter of fining agent is 3 μ m～17 μ m.Other is identical with the specific embodiment one.
The specific embodiment three: what present embodiment and the specific embodiment one were different is: the particle diameter of fining agent is 10 μ m.Other is identical with the specific embodiment one.
The specific embodiment four: what present embodiment was different with one of specific embodiment one to three is: the mass ratio of binding agent and refractory powder is 1: 1.8～3.5.Other is identical with one of specific embodiment one to three.
The specific embodiment five: what present embodiment was different with one of specific embodiment one to three is: the mass ratio of binding agent and refractory powder is 1: 2.5.Other is identical with one of specific embodiment one to three.
The specific embodiment six: what present embodiment was different with one of specific embodiment one to five is: the quality of wetting agent is 0.1%～0.4% of a binding agent quality.Other is identical with one of specific embodiment one to five.
The specific embodiment seven: what present embodiment was different with one of specific embodiment one to five is: the quality of wetting agent is 0.2% of a binding agent quality.Other is identical with one of specific embodiment one to five.
The specific embodiment eight: what present embodiment was different with one of specific embodiment one to seven is: the quality of defoamer is 0.2%～0.5% of a binding agent quality.Other is identical with one of specific embodiment one to seven.
The specific embodiment nine: what present embodiment was different with one of specific embodiment one to seven is: the quality of defoamer is 0.3% of a binding agent quality.Other is identical with one of specific embodiment one to seven.
The specific embodiment ten: what present embodiment was different with one of specific embodiment one to nine is: the quality of dispersant is 0.8%～2.8% of a binding agent quality.Other is identical with one of specific embodiment one to nine.
The specific embodiment 11: what present embodiment was different with one of specific embodiment one to nine is: the quality of dispersant is 2.0% of a binding agent quality.Other is identical with one of specific embodiment one to nine.
The specific embodiment 12: what present embodiment was different with one of specific embodiment one to 11 is: the quality of fining agent is 3%～18% of a refractory powder quality.Other is identical with one of specific embodiment one to 11.
When fining agent was composition in the present embodiment, various fining agents were pressed arbitrarily than combination.
The specific embodiment 13: what present embodiment was different with one of specific embodiment one to 11 is: the quality of fining agent is 10% of a refractory powder quality.Other is identical with one of specific embodiment one to 11.
When fining agent was composition in the present embodiment, various fining agents were pressed arbitrarily than combination.
The specific embodiment 14: the preparation method of 600 ℃ of high-temperature titanium alloy investment casting shell investment precoats of present embodiment carries out according to the following steps: one, take by weighing refractory powder, binding agent, wetting agent, defoamer, dispersant and particle diameter are the fining agent of 1 μ m～20 μ m, wherein the mass ratio of binding agent and refractory powder is 1: 1.6～4, the quality of wetting agent is 0.05%～0.5% of a binding agent quality, the quality of defoamer is 0.1%～0.6% of a binding agent quality, the quality of dispersant is 0.5%～3% of a binding agent quality, the quality of fining agent is 1%～20% of a refractory powder quality, refractory powder is for being aluminium oxide, zirconia, yittrium oxide or calcium oxide, binding agent is two acetic acid zirconiums, zirconium carbonate ammonium, Ludox or yttrium colloidal sol, fining agent is a carbon dust, the combination of one or more in boron powder and the boron carbide powder; Two, the fining agent that step 1 is taken by weighing joins with refractory powder and mixes 3h～5h in the mixer, obtains mixed powder; Three, stir 3h～8h in the binding agent adding L type mould wash mixer that mixed powder that step 2 is prepared and step 1 take by weighing, and then the wetting agent that step 1 is taken by weighing, defoamer, dispersant add in the mould wash mixer, continue to stir 12h～48h, obtain 600 ℃ of high-temperature titanium alloy investment casting shell investment precoats.
L type mould wash mixer in the present embodiment is the commercial goods.
600 ℃ of high-temperature titanium alloy investment casting shell investment precoats of present embodiment adopt carbon dust, boron powder, B
4A kind of or wherein several combination in the C powder is as fining agent, investment precoat flow cup viscosity is 20s～40s (4# Zhan Shi cup), when model casting, utilizes the reaction between fining agent and melts of titanium alloy, separate out TiB or TiC at crystal boundary, thereby reach the effect of crystal grain thinning.Utilize the shell of this investment precoat preparation, behind the cast high-temperature titanium alloy, can refined cast structure, particularly textura epidermoidea, improved intensity, non-oxidizability and the anti-fatigue performance of alloy.
The specific embodiment 15: what present embodiment and the specific embodiment 14 were different is: the particle diameter of fining agent is 3 μ m～17 μ m in the step 1.Other is identical with the specific embodiment 14.
The specific embodiment 16: what present embodiment and the specific embodiment 14 were different is: the particle diameter of fining agent is 10 μ m in the step 1.Other is identical with the specific embodiment 14.
The specific embodiment 17: what present embodiment was different with one of specific embodiment 14 to 16 is: the mass ratio of binding agent and refractory powder is 1: 1.8～3.5 in the step 1.Other is identical with one of specific embodiment 14 to 16.
The specific embodiment 18: what present embodiment was different with one of specific embodiment 14 to 16 is: the mass ratio of binding agent and refractory powder is 1: 2.5 in the step 1.Other is identical with one of specific embodiment 14 to 16.
The specific embodiment 19: what present embodiment was different with one of specific embodiment 14 to 18 is: the quality of wetting agent is 0.1%～0.4% of a binding agent quality in the step 1.Other is identical with one of specific embodiment 14 to 18.
The specific embodiment 20: what present embodiment was different with one of specific embodiment 14 to 18 is: the quality of wetting agent is 0.2% of a binding agent quality in the step 1.Other is identical with one of specific embodiment 14 to 18.
The specific embodiment 21: what present embodiment was different with one of specific embodiment 14 to 20 is: the quality of defoamer is 0.2%～0.5% of a binding agent quality in the step 1.Other is identical with one of specific embodiment 14 to 20.
The specific embodiment 22: what present embodiment was different with one of specific embodiment 14 to 20 is: the quality of defoamer is 0.3% of a binding agent quality in the step 1.Other is identical with one of specific embodiment 14 to 20.
The specific embodiment 23: what present embodiment was different with one of specific embodiment 14 to 22 is: the quality of dispersant is 0.8%～2.8% of a binding agent quality in the step 1.Other is identical with one of specific embodiment 14 to 22.
The specific embodiment 24: what present embodiment was different with one of specific embodiment 14 to 22 is: the quality of dispersant is 2.0% of a binding agent quality in the step 1.Other is identical with one of specific embodiment 14 to 22.
The specific embodiment 25: what present embodiment was different with one of specific embodiment 14 to 24 is: the quality of fining agent is 3%～18% of a refractory powder quality.Other is identical with one of specific embodiment 14 to 24.
The specific embodiment 26: what present embodiment was different with one of specific embodiment 14 to 24 is: the quality of fining agent is 10% of a refractory powder quality in the step 1.Other is identical with one of specific embodiment 14 to 24.
The specific embodiment 27: what present embodiment was different with one of specific embodiment 14 to 26 is: in the step 2 fining agent and refractory powder joined and mix 3.5h～4.5h in the mixer.Other is identical with one of specific embodiment 14 to 26.
The specific embodiment 28: what present embodiment was different with one of specific embodiment 14 to 26 is: in the step 2 fining agent and refractory powder joined and mix 4.0h in the mixer.Other is identical with one of specific embodiment 14 to 26.
The specific embodiment 29: what present embodiment was different with one of specific embodiment 14 to 28 is: in the step 3 mixed powder and binding agent added that mixing time is 4h～7h in the L type mould wash mixer.Other is identical with one of specific embodiment 14 to 28.
The specific embodiment 30: what present embodiment was different with one of specific embodiment 14 to 28 is: in the step 3 mixed powder and binding agent added that mixing time is 5h in the L type mould wash mixer.Other is identical with one of specific embodiment 14 to 28.
The specific embodiment 31: what present embodiment was different with one of specific embodiment 14 to 28 is: in the step 3 wetting agent, defoamer, dispersant are added in the mould wash mixer, continue to stir 13h～45h.Other is identical with one of specific embodiment 14 to 28.
The specific embodiment 32: what present embodiment was different with one of specific embodiment 14 to 28 is: in the step 3 wetting agent, defoamer, dispersant are added in the mould wash mixer, continue to stir 20h.Other is identical with one of specific embodiment 14 to 28.
The specific embodiment 33: the preparation method of the investment precoat of 600 ℃ of high-temperature titanium alloy shells of a kind of model casting of present embodiment carries out according to the following steps: one, taking by weighing the wetting agent jfc of 325 order 1500g yittrium oxide powder, 500g two Zirconium acetate agglutinate agent, 1.5g, the n-octyl alcohol defoamer of 1.5g, triethanolamine dispersant and the 150g particle diameter of 5g is the B of 5 μ m
4The C powder; Two, the B that step 1 is taken by weighing
4The C powder joins with the yittrium oxide powder and mixes 3h in the mixer, obtains mixed powder; Three, stir 5h in the two Zirconium acetate agglutinate agent adding L type mould wash mixer that mixed powder that step 2 is prepared and step 1 take by weighing, and then the wetting agent jfc that step 1 is taken by weighing, n-octyl alcohol and triethanolamine add in the mixer, continue to stir 36 hours, obtain 600 ℃ of high-temperature titanium alloy investment casting shell investment precoats.
Wetting agent jfc is the commercial goods in the present embodiment.The flow cup viscosity of 600 ℃ of high-temperature titanium alloy investment casting shell investment precoats of present embodiment preparation is 35s (4# Zhan Shi cup).
The method that 600 ℃ of high-temperature titanium alloy investment casting shell investment precoats that prepare with present embodiment prepare investment casting shell is carried out according to the following steps: one, wax-pattern is immersed in 600 ℃ of high-temperature titanium alloy investment casting shell investment precoats of present embodiment preparation, the wax-pattern surface slurry that hangs up properly is even until being coated with, wax-pattern is proposed, adopt the sand mode that adds of the formula that drenches with rain to spread 120 order zirconias then, be that 24 ℃, relative humidity are under 60% the condition dry 9 hours in temperature then, obtain preparing the shell of surface layer; Two, be refractory powder with 200 purpose mullite powder, with the Ludox is binding agent, the mass ratio that adopts refractory powder and Ludox is 1.8: 1 preparation transition zone coating, the shell that then step 1 is prepared surface layer is immersed in the transition zone coating is stained with slurry, be coated with hang evenly after, spreading 60 order mullite sand, is that 24 ℃, relative humidity are under 50% the condition dry 12 hours in temperature then, obtains preparing the shell of transition zone; Three, be refractory powder with 200 purpose mullite powder, with the Ludox is binding agent, the mass ratio that adopts water-fast powder and Ludox is 1.5: 1 preparation backing layer slurries, the shell that then step 2 is prepared transition zone is immersed in the backing layer slurry is stained with slurry, then spreading 20 order mullite sand, is that 24 ℃, relative humidity are under 50% the condition dry 15 hours in temperature then; And then the identical operations condition repeats hanging, stucco and drying, and triplicate obtains preparing the shell of backing layer; Four, be refractory powder with 200 purpose mullite powder, with the Ludox is binding agent, the mass ratio that adopts refractory powder and Ludox is 1.3: 1 preparation envelope slurry coatings, the shell that then step 3 is prepared backing layer is immersed in hanging in the transition zone coating, be coated with and hang evenly back proposition, obtain preparing the shell of envelope slurry layer; Five, will seal shell behind the slurry, dry 24 hours, put into steam dewaxing still then, be to dewax the shell after obtaining dewaxing under the condition of 0.8MPa at steam pressure; Six, the shell after will dewaxing is placed in the vacuum sintering furnace, is roasting 2 hours under 1000 ℃ the condition for 0.095MPa, temperature at true degree, obtains 600 ℃ of high-temperature titanium alloy investment casting shells.
With 600 ℃ of high-temperature titanium alloy investment casting shells of common shell and present embodiment preparation under identical condition, with cast Ti-6Al-2.75Sn-4Zr-0.4Mo-0.45Si titanium alloy (being the Ti-1100 high-temperature titanium alloy) in the centrifugal titanium casting machine, with the as-cast microstructure photo of the Ti-1100 high-temperature titanium alloy of common shell casting as shown in Figure 1, as-cast microstructure photo such as Fig. 2 with the Ti-1100 high-temperature titanium alloy of 600 ℃ of high-temperature titanium alloy investment casting shells castings of present embodiment preparation, as can be seen from Figure 1, the crystallite dimension with the alloy of common shell cast is about 500 μ m.The crystal grain on surface does not have the existence of refinement layer with inner consistent.As can be seen from Figure 2, and the average grain size of the alloy that obtains with the cast of 600 ℃ of high-temperature titanium alloy investment casting shells is about 300 μ m, and exist a thickness on the surface (left side of Fig. 2) of alloy and be the refinement layer about 150 μ m, size of microcrystal is about 50 μ m.
From Fig. 1 and Fig. 2 more as can be seen, the alloy that obtains with the shell of the investment precoat of present embodiment preparation, as-cast structure obtains refinement, textura epidermoidea particularly, adopt the shell surface of this method preparation to exist a tangible grain refinement layer, can improve the intensity and the anti-fatigue performance of alloy.
Claims (10)
1.600 ℃ high-temperature titanium alloy investment casting shell investment precoat, it is characterized in that 600 ℃ of high-temperature titanium alloy investment casting shell investment precoats are by refractory powder, binding agent, wetting agent, defoamer, dispersant and particle diameter are that the fining agent of 1 μ m～20 μ m is made, wherein the mass ratio of binding agent and refractory powder is 1: 1.6～4, the quality of wetting agent is 0.05%～0.5% of a binding agent quality, the quality of defoamer is 0.1%～0.6% of a binding agent quality, the quality of dispersant is 0.5%～3% of a binding agent quality, the quality of fining agent is 1%～20% of a refractory powder quality, refractory powder is an aluminium oxide, zirconia, yittrium oxide or calcium oxide, binding agent is two acetic acid zirconiums, zirconium carbonate ammonium, Ludox or yttrium colloidal sol, fining agent is a carbon dust, the combination of one or more in boron powder and the boron carbide powder.
2. 600 ℃ of high-temperature titanium alloy investment casting shell investment precoats according to claim 1, the particle diameter that it is characterized in that fining agent are 3 μ m～17 μ m.
3. 600 ℃ of high-temperature titanium alloy investment casting shell investment precoats according to claim 1 and 2, the mass ratio that it is characterized in that binding agent and refractory powder is 1: 1.8～3.5.
4. 600 ℃ of high-temperature titanium alloy investment casting shell investment precoats according to claim 1 and 2, the quality that it is characterized in that wetting agent is 0.1%～0.4% of a binding agent quality.
5. 600 ℃ of high-temperature titanium alloy investment casting shell investment precoats according to claim 1 and 2, the quality that it is characterized in that dispersant is 0.8%～2.8% of a binding agent quality.
6. 600 ℃ of high-temperature titanium alloy investment casting shell investment precoats according to claim 1 and 2, the quality that it is characterized in that fining agent is 3%～18% of a refractory powder quality.
7. the method for preparing the described 600 ℃ of high-temperature titanium alloy investment casting shell investment precoats of claim 1, it is characterized in that the method for preparing 600 ℃ of high-temperature titanium alloy investment casting shell investment precoats carries out according to the following steps: one, take by weighing refractory powder, binding agent, wetting agent, defoamer, dispersant and particle diameter are the fining agent of 1 μ m～20 μ m, wherein the mass ratio of binding agent and refractory powder is 1: 1.6～4, the quality of wetting agent is 0.05%～0.5% of a binding agent quality, the quality of defoamer is 0.1%～0.6% of a binding agent quality, the quality of dispersant is 0.5%～3% of a binding agent quality, the quality of fining agent is 1%～20% of a refractory powder quality, refractory powder is for being aluminium oxide, zirconia, yittrium oxide or calcium oxide, binding agent is two acetic acid zirconiums, zirconium carbonate ammonium, Ludox or yttrium colloidal sol, fining agent is a carbon dust, the combination of one or more in boron powder and the boron carbide powder; Two, the fining agent that step 1 is taken by weighing joins with refractory powder and mixes 3h～5h in the mixer, obtains mixed powder; Three, stir 3h～8h in the binding agent adding L type mould wash mixer that mixed powder that step 2 is prepared and step 1 take by weighing, and then the wetting agent that step 1 is taken by weighing, defoamer, dispersant add in the mould wash mixer, continue 12h～48h, obtain 600 ℃ of high-temperature titanium alloy investment casting shell investment precoats.
8. the method for 600 ℃ of high-temperature titanium alloy investment casting shells of preparation according to claim 7 investment precoat is characterized in that in the step 2 fining agent and refractory powder joined and mixes 3.5h～4.5h in the mixer.
9. according to the method for claim 7 or 600 ℃ of high-temperature titanium alloy investment casting shells of 8 described preparations investment precoat, it is characterized in that in the step 3 mixed powder and binding agent added that mixing time is 4h～7h in the L type mould wash mixer.
10. according to the method for claim 7 or 600 ℃ of high-temperature titanium alloy investment casting shells of 8 described preparations investment precoat, it is characterized in that in the step 3 wetting agent, defoamer, dispersant being added in the mould wash mixer, continue to stir 13h～45h.
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| CN108327165A (en) * | 2018-01-31 | 2018-07-27 | 中国航发北京航空材料研究院 | A kind of manufacturing method of titanium alloy framework composite material casing |
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| CN113857424A (en) * | 2021-08-17 | 2021-12-31 | 成都兴宇精密铸造有限公司 | Titanium alloy investment casting shell surface coating and preparation method thereof |
| CN113909436A (en) * | 2021-09-13 | 2022-01-11 | 华中科技大学 | Preparation method of ceramic shell for titanium alloy casting |
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| CN106493287A (en) * | 2016-11-28 | 2017-03-15 | 上海航天精密机械研究所 | Preparation method of the casting with yittrium oxide shell |
| CN106391997A (en) * | 2016-11-28 | 2017-02-15 | 上海航天精密机械研究所 | Preparation method of yttrium oxide composite paint for investment casting of titanium alloy |
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| CN112170776B (en) * | 2019-07-05 | 2021-12-28 | 章元材料科技(沈阳)有限公司 | Reinforced stable yttrium oxide slurry and preparation method thereof |
| CN112170776A (en) * | 2019-07-05 | 2021-01-05 | 章元材料科技(沈阳)有限公司 | Reinforced stable yttrium oxide slurry and preparation method thereof |
| CN110802197A (en) * | 2019-10-22 | 2020-02-18 | 东风精密铸造安徽有限公司 | Surface coating for investment casting shell |
| CN112517846A (en) * | 2020-10-23 | 2021-03-19 | 中国科学院金属研究所 | Method for reducing inclusion content of high-temperature alloy casting |
| CN112517846B (en) * | 2020-10-23 | 2022-01-14 | 中国科学院金属研究所 | Method for reducing inclusion content of high-temperature alloy casting |
| CN113857424A (en) * | 2021-08-17 | 2021-12-31 | 成都兴宇精密铸造有限公司 | Titanium alloy investment casting shell surface coating and preparation method thereof |
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Application publication date: 20110817 |