CN102527937A - Method for preparing fiber-reinforced thin-wall shell for casting titanium alloy smelting mold - Google Patents
Method for preparing fiber-reinforced thin-wall shell for casting titanium alloy smelting mold Download PDFInfo
- Publication number
- CN102527937A CN102527937A CN2012100686182A CN201210068618A CN102527937A CN 102527937 A CN102527937 A CN 102527937A CN 2012100686182 A CN2012100686182 A CN 2012100686182A CN 201210068618 A CN201210068618 A CN 201210068618A CN 102527937 A CN102527937 A CN 102527937A
- Authority
- CN
- China
- Prior art keywords
- shell
- slurry
- preparation
- binding agent
- titanium alloy
- 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.)
- Pending
Links
Images
Landscapes
- Mold Materials And Core Materials (AREA)
Abstract
The invention relates to a method for preparing a fiber-reinforced thin-wall shell for casting a titanium alloy smelting mold, in particular to a method for preparing a shell for casting a high-temperature titanium alloy smelting mold. According to the method, the technical problems of large coating thickness, low air permeability and high operation difficulty of a shell prepared by the method for improving the intensity of the shell by using fibers are solved. The method comprises the following steps of: 1, performing pickling pretreatment on refractory fibers; 2, preparing the surface layer of the shell; 3, adding the refractory fibers into a binder to obtain a transition layer prewetting agent, and coating the shell in the transition layer prewetting agent and then in transition layer slurry; 4, adding the refractory fibers into another binder to obtain a back layer prewetting agent, and alternatively coating the shell in the back layer prewetting agent and back layer slurry; 5, coating the shell in an encapsulation slurry layer prewetting agent and then in encapsulation slurry layer slurry; and 6, dewaxing and sintering, and thus obtaining the fiber-reinforced thin-wall shell for casting the titanium alloy smelting mold. The shell can be used for casting high-temperature alloys.
Description
Technical field
The present invention relates to the preparation method of titanium alloy moltening mold castings shell.
Background technology
High-temperature titanium alloy is widely used in aviation field owing to good comprehensive performances such as specific strength is high, corrosion-resistant, heat-resisting and structure high efficiency, 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.At present, the high-temperature titanium alloy of research mostly is the distortion high-temperature titanium alloy both at home and abroad, and they generally are applied through the form of ingot casting, forging stock, sheet material.Mostly the high-temperature titanium alloy of present 600 ℃ of using and higher temperature is Ti-Al-Sn-Zr-Mo-Si system; And carry out the interpolation (like rare earth) of multielement on this basis; Composition is diversification more, and the adding of multielement makes the mobile variation of alloy, when utilizing investment casting to prepare; The casting difficulty is bigger, and is higher to the requirement of model casting technology.The shell of common process preparation is generally 7 layers, if adopt the shell cast high-temperature titanium alloy of common process preparation, is prone to produce misrun, feels suffocated defectives such as pore.If reduce plain edition shell number, though the gas permeability of shell is improved, the intensity of shell can reduce, and breaks easily in the process of cast, particularly in the centrifugal casting process, breaks more easily, causes alloy melt to flow out.In order to improve the intensity of shell, be 201010272783.0 Chinese patent like application number, prepare at shell and dose fibrous material in the process; But directly be added on fiber in the slurry; The viscosity that this will improve slurry greatly makes the coating thickening of shell, the gas permeability variation of shell.Fiber is also reunited in the process that slurry stirs easily, skewness, and operation easier is bigger, and the shell unstable properties after the preparation.
Summary of the invention
The present invention will solve the existing thick coating that utilizes fiber to improve the method shell of investment shell intensity, the technical problem that gas permeability difference and operation easier are big, and a kind of preparation method of titanium alloy moltening mold castings fiber reinforcement thin-walled shell is provided.
The preparation method of a kind of titanium alloy moltening mold castings fiber reinforcement thin-walled shell of the present invention carries out according to the following steps:
One, refractory fibre preliminary treatment: refractory fibre is put into ethanol earlier; Be placed on then and clean 15～30 minutes in the ultrasonic cleaner; And then put into sulfuric acid solution or the hydrochloric acid solution that concentration is 0.5～5mol/L and soaked 5～60 minutes; With washing, drying, accomplish the preliminary treatment of refractory fibre again; Wherein refractory fibre is glass fibre, ceramic fibre or mullite fiber, and the diameter of refractory fibre is 5～30 μ m, and length is 1～15mm;
Two, shell surface layer preparation: the mass ratio by refractory powder and binding agent is (1.8～2.8): 1 joins refractory powder in the binding agent, stirs, and obtains surface layer slurry; Wax-pattern is immersed in the surface layer slurry to hang is coated with, after the proposition, stucco, drying obtain surface shell;
Three, shell transition zone preparation: the refractory fibre that step 1 was handled is 0.5%～5% to join in the binding agent by the quality percentage composition, stirs, and obtains the transition zone agent of prewetting; Mass ratio by refractory powder and binding agent is (1.5～1.8): 1 joins refractory powder in the binding agent, stirs, and obtains the transition zone slurry; To in the surface shell elder generation immersion transition zone of step 2 preparation is prewetted agent, keep 3～30s, and propose shell then, and behind placement 10～60min, immerse transition zone slurry extension again and be coated with slurry, after the proposition, stucco, drying obtain the transition zone shell;
Four, shell backing layer preparation: the refractory fibre that step 1 was handled is 0.5%～10% to join in the binding agent by the quality percentage composition, stirs, and obtains the backing layer agent of prewetting; Mass ratio by refractory powder and binding agent is (1.2～1.6): 1 joins refractory powder in the binding agent, stirs, and obtains the backing layer slurry; The transition zone shell that step 3 is obtained immerses backing layer earlier prewets and keeps 3～30s in the agent, proposes shell then, place 10～60min after; Immerse again to hang in the backing layer slurry and be coated with slurry; After the proposition, stucco, drying are accomplished the preparation of one deck backing layer; Repeat in this step in backing layer is prewetted agent dipping, place, in the backing layer slurry, hang be coated with, stucco and drying process 1～3 time, obtain the backing layer shell;
Five, shell envelope slurry layer preparation: the refractory fibre that step 1 was handled is 0.5%～10% to join in the binding agent by the quality percentage composition, stirs, and obtains envelope and starches the agent of layer prewetting; Mass ratio by refractory powder and binding agent is (1～1.3): 1 joins refractory powder in the binding agent, stirs, and obtains an envelope slurry layer slurry; To in the backing layer shell elder generation immersion envelope slurry layer that step 4 obtains is prewetted agent, keep 3～30s, and propose shell then, behind placement 10～60min, extension is coated with slurry in the slurry of the immersion envelope again layer slurry, after the proposition, and drying, the preparation of completion shell envelope slurry layer;
Six, sintering: will be through the shell of the completion envelope slurry layer preparation of step 5 preparation, after the dewaxing, be high temperature kiln roasting 30～90min of 900～1200 ℃ in temperature, obtain titanium alloy moltening mold castings fiber reinforcement thin-walled shell.
Titanium alloy moltening mold castings fiber reinforcement thin-walled shell of the present invention at first carries out preliminary treatment to fiber, makes the faying face between fiber and slurry more firm; When the preparation backing layer, refractory fibre is joined in the agent of prewetting, refractory fibre is easy to disperse; Can evenly hang over the shell surface, refractory fibre and backing layer slurry are alternately hung and are coated with during preparation, are beneficial to the raising investment shell intensity; Improve the gas permeability of shell, can make the shell attenuate, and fiber adds in the agent of prewetting; To not influence of slurry, hang and be coated with that operation is simple.
Adopt the shell of method preparation of the present invention; More existing fiber reinforcement process for making shell; System has shortened 24～36 hours in the shell cycle, the shell weight reduction about 20%, system shell cost has reduced by 15%～20%; Shell with this fibre-reinforced thin-walled shell and common process preparation has carried out mobile experiment and air permeability test respectively; Experimental result is illustrated under the same experiment condition, and the length of flow of helix sample has improved about 15%, and the gas permeability of thin-walled shell is higher by about 20% than the shell of common process preparation.This shell has higher advantage to making thin-wall complicated foundry goods.Can be used for casting 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-6.2Al-2Sn-3.6Zr-0.7Mo-0.1Y-5.0W-0.15Si) and Ti60 high-temperature titanium alloys such as (Ti-5.8Al-4.8Sn-2.0Zr-1.0Mo-0.135Si-0.85Nd).
Description of drawings
Fig. 1 is the Ti-1100 alloy cavity filling ability photo that obtains with the titanium alloy moltening mold castings fiber reinforcement thin-walled shell centrifugal casting that test one prepares;
Fig. 2 is the Ti-1100 alloy cavity filling ability photo that obtains with the shell of testing the contrast in;
Fig. 3 is the IMI834 alloy flow performance photo that obtains with the titanium alloy moltening mold castings fiber reinforcement thin-walled shell that test one prepares;
Fig. 4 is the IMI834 alloy flow performance photo that obtains with the shell of testing the contrast in.
The specific embodiment
The specific embodiment one: the preparation method of a kind of titanium alloy moltening mold castings fiber reinforcement thin-walled shell of this embodiment carries out according to the following steps:
One, refractory fibre preliminary treatment: refractory fibre is put into ethanol earlier; Be placed on then and clean 15～30 minutes in the ultrasonic cleaner; And then put into sulfuric acid solution or the hydrochloric acid solution that concentration is 0.5～5mol/L and soaked 5～60 minutes; With washing, drying, accomplish the preliminary treatment of refractory fibre again; Wherein refractory fibre is glass fibre, ceramic fibre or mullite fiber, and the diameter of refractory fibre is 5～30 μ m, and length is 1～15mm;
Two, shell surface layer preparation: the mass ratio by refractory powder and binding agent is (1.8～2.8): 1 joins refractory powder in the binding agent, stirs, and obtains surface layer slurry; Wax-pattern is immersed in the surface layer slurry to hang is coated with, after the proposition, stucco, drying obtain surface shell;
Three, shell transition zone preparation: the refractory fibre that step 1 was handled is 0.5%～5% to join in the binding agent by the quality percentage composition, stirs, and obtains the transition zone agent of prewetting; Mass ratio by refractory powder and binding agent is (1.5～1.8): 1 joins refractory powder in the binding agent, stirs, and obtains the transition zone slurry; To in the surface shell elder generation immersion transition zone of step 2 preparation is prewetted agent, keep 3～30s, and propose shell then, and behind placement 10～60min, immerse transition zone slurry extension again and be coated with slurry, after the proposition, stucco, drying obtain the transition zone shell;
Four, shell backing layer preparation: the refractory fibre that step 1 was handled is 0.5%～10% to join in the binding agent by the quality percentage composition, stirs, and obtains the backing layer agent of prewetting; Mass ratio by refractory powder and binding agent is (1.2-1.6): 1 joins refractory powder in the binding agent, stirs, and obtains the backing layer slurry; The transition zone shell that step 3 is obtained immerses backing layer earlier prewets and keeps 3～30s in the agent, proposes shell then, place 10～60min after; Immerse again to hang in the backing layer slurry and be coated with slurry; After the proposition, stucco, drying are accomplished the preparation of one deck backing layer; Repeat in this step in backing layer is prewetted agent dipping, place, in the backing layer slurry, hang be coated with, stucco and drying process 1～3 time, obtain the backing layer shell;
Five, shell envelope slurry layer preparation: the refractory fibre that step 1 was handled is 0.5%～10% to join in the binding agent by the quality percentage composition, stirs, and obtains envelope and starches the agent of layer prewetting; Mass ratio by refractory powder and binding agent is (1-1.3): 1 joins refractory powder in the binding agent, stirs, and obtains an envelope slurry layer slurry; To in the backing layer shell elder generation immersion envelope slurry layer that step 4 obtains is prewetted agent, keep 3～30s, and propose shell then, behind placement 10～60min, extension is coated with slurry in the slurry of the immersion envelope again layer slurry, after the proposition, and drying, the preparation of completion shell envelope slurry layer;
Six, sintering: will be through the shell of the completion envelope slurry layer preparation of step 5 preparation, after the dewaxing, be high temperature kiln roasting 30～90min of 900～1200 ℃ in temperature, obtain titanium alloy moltening mold castings fiber reinforcement thin-walled shell.
Adopt the shell of the method preparation of this embodiment; More existing fiber reinforcement process for making shell; System has shortened 24-36 hour in the shell cycle, the shell weight reduction about 20%, system shell cost has reduced 15%-20%; Shell with this fibre-reinforced thin-walled shell and common process preparation has carried out mobile experiment and air permeability test respectively; Experimental result is illustrated under the same experiment condition, and the length of flow of helix sample has improved about 15%, and the gas permeability of thin-walled shell is higher by about 20% than the shell of common process preparation.This shell has higher advantage to making thin-wall complicated foundry goods.
The specific embodiment two: what this embodiment and the specific embodiment one were different is: the described refractory powder of step 2 is zirconia powder, yittrium oxide powder or alumina powder.Other are identical with the specific embodiment one.
The granularity of the refractory powder in this embodiment is 300 orders～320 orders.
The specific embodiment three: what this embodiment was different with the specific embodiment one or two is: the binding agent described in the step 2 is Ludox, silester or zirconium colloidal sol.Other are identical with the specific embodiment one or two.
The specific embodiment four: what this embodiment was different with one of specific embodiment one to three is: the sand in the step 2 stucco is oxidation zircon sand, aluminum oxide sand or yttrium oxide sand.Other are identical with one of specific embodiment one to three.
The granularity of the sand in this embodiment is 100～120 orders.
The specific embodiment five: what this embodiment was different with one of specific embodiment one to four is: step 3, the refractory powder described in four and five are mullite powder, colliery powder or kaolin.Other are identical with one of specific embodiment one to four.
The granularity of the refractory powder in this embodiment is 60～80 orders.
The specific embodiment six: what this embodiment was different with one of specific embodiment one to five is: the sand in the step 3, four and five in the stucco is mullite sand, bastard coal stone sand or kaolin sand.Other are identical with one of specific embodiment one to five.
The granularity of the sand in this embodiment is the 30-60 order.
The specific embodiment seven: what this embodiment was different with one of specific embodiment one to six is: when the shell backing layer described in the step 4 was dry, the relative humidity of environment was 40%～60%, and temperature is 22～26 ℃, and be 10～14h drying time.Other are identical with one of specific embodiment one to six.
The specific embodiment eight: what this embodiment was different with one of specific embodiment one to seven is: transition zone is prewetted in the step 3, and the quality percentage composition of refractory fibre is 0.8%～3% of a binding agent in the agent, and the mass ratio of refractory powder and binding agent is (1.55～1.75) in the transition zone slurry: 1.Other are identical with one of specific embodiment one to seven.
The specific embodiment nine: what this embodiment was different with one of specific embodiment one to eight is: backing layer is prewetted in the step 4, and the quality percentage composition of refractory fibre is 2%～8% of a binding agent in the agent, and the mass ratio of refractory powder and binding agent is (1.3-1.5) in the backing layer slurry: 1.Other are identical with one of specific embodiment one to eight.
The specific embodiment ten: what this embodiment was different with one of specific embodiment one to nine is: envelope slurry layer is prewetted in the step 5, and the quality percentage composition of refractory fibre is 2%～8% of a binding agent in the agent, and the mass ratio of refractory powder and binding agent is (1.1～1.2) in the envelope slurry layer slurry: 1.Other are identical with one of specific embodiment one to nine.
With following verification experimental verification beneficial effect of the present invention:
Test one: the preparation method of a kind of titanium alloy moltening mold castings fiber reinforcement thin-walled shell of this test one carries out according to the following steps:
One, glass fibre preliminary treatment: glass fibre is put into ethanol earlier; Be placed on then in the ultrasonic cleaner and cleaned 20 minutes; And then put into sulfuric acid solution or the hydrochloric acid solution that concentration is 3mol/L and soaked 30 minutes, with washing, drying, accomplish the preliminary treatment of glass fibre again; Wherein the diameter of glass fibre is 10 μ m, and length is 5～10mm;
Two, shell surface layer preparation: by the mass ratio of zirconia powder and zirconium glue is 320 purpose zirconia powders to be joined in the zirconium glue in 2.6: 1, stirs, and obtains surface layer slurry; Wax-pattern is immersed in the surface layer slurry to hang is coated with, after the proposition, to spread particle diameter be 120 purpose mullite sand, under 24 ℃ temperature dry 10 hours, obtains surface shell;
Three, shell transition zone preparation: the glass fibre that step 1 was handled is 1% to join in the Ludox by the quality percentage composition, stirs, and obtains the transition zone agent of prewetting; By the mass ratio of mullite powder and Ludox is 200 purpose mullite powder to be joined in the Ludox in 1.5: 1, stirs, and obtains the transition zone slurry; To, the surface shell elder generation immersion transition zone of step 2 preparation keep 3～30s in prewetting agent; Shell is proposed then; After placing 10～60min, immerse transition zone slurry extension again and be coated with slurry, after the proposition; To spread particle diameter be 80 purpose mullite sand, under 24 ℃ temperature dry 12 hours, obtain the transition zone shell;
Four, shell backing layer preparation: the glass fibre that step 1 was handled is 3% to join in the Ludox by the quality percentage composition, stirs, and obtains the backing layer agent of prewetting; By the mass ratio of mullite powder and Ludox is 200 purpose mullite powder to be joined in the Ludox in 1.6: 1, stirs, and obtains the backing layer slurry; The transition zone shell that step 3 is obtained immerses the backing layer that keeps stirring earlier prewets and keeps 10s in the agent; Shell is proposed then, place 40min after, immerse again to hang in the backing layer slurry and be coated with slurry; After the proposition; Spreading particle diameter is 60 purpose mullite sand, then shell be placed on that relative humidity is 40%, temperature is dry 10h in 25 ℃ the environment, accomplishes the preparation of one deck backing layer; Repeat in this step in backing layer is prewetted agent dipping, place, in the backing layer slurry, hang that to be coated with, to spread particle diameter be 60 purpose mullite sand and drying process 2 times, obtain the backing layer shell;
Five, shell envelope slurry layer preparation: the glass fibre that step 1 was handled is 1.5% to join in the Ludox by the quality percentage composition, stirs, and obtains envelope and starches the agent of layer prewetting; By the mass ratio of mullite powder and Ludox is 200 purpose mullite powder to be joined in the Ludox in 1.3: 1, stirs, and obtains an envelope slurry layer slurry; To in the backing layer shell elder generation immersion envelope slurry layer that step 4 obtains is prewetted agent, keep 3～30s, propose shell then, behind the placement 40min; Immerse again to hang in the envelope slurry layer slurry and be coated with slurry; After the proposition, drying is 24 hours under 24 ℃ temperature, accomplishes the preparation of shell envelope slurry layer;
Six, sintering: will be through the shell of the completion envelope slurry layer preparation of step 5 preparation, after the dewaxing, be 1200 ℃ high temperature kiln roasting 60min in temperature, obtain titanium alloy moltening mold castings fiber reinforcement thin-walled shell.
Shell as contrast prepares by following step:
The preparation of a, shell surface layer: by the mass ratio of zirconia powder and zirconium glue is 320 purpose zirconia powders to be joined in the zirconium glue in 2.6: 1, stirs, and obtains surface layer slurry; Wax-pattern is immersed in the surface layer slurry to hang is coated with, after the proposition, to spread particle diameter be 120 purpose oxidation zircon sands, under 24 ℃ temperature dry 10 hours, obtains surface shell;
The preparation of b, transition zone shell: is 1% to join in the Ludox glass fibre by the quality percentage composition, and the mass ratio by mullite powder and Ludox is 1.8: 1 adding 200 purpose mullite powder again, stirs, and obtains the transition zone slurry; To immerse the transition zone slurry through the surface shell of step a preparation again and hang and be coated with slurry, after the proposition, to spread particle diameter be 80 purpose mullite sand, under 24 ℃ temperature dry 12 hours, obtains the transition zone shell;
The preparation of c, backing layer shell: is 2% to join in the Ludox glass fibre by the quality percentage composition, and the mass ratio by mullite powder and Ludox is 1.5: 1 adding 200 purpose mullite powder again, stirs, and obtains the backing layer slurry; To immerse backing layer slurry extension through the transition zone shell of step b preparation again and be coated with slurry; After the proposition; Spread particle diameter and be 80 purpose mullite sand, be 40% in relative humidity, temperature is under 24 ℃ the condition dry 12 hours; Repeat in this step in the backing layer slurry, to hang and be coated with, spread stone sand and drying process 2 times, obtain the backing layer shell;
D, envelope slurry layer preparation: is 0.5% to join in the Ludox glass fibre by the quality percentage composition, is to add 200 purpose mullite powder at 1.3: 1 by the mass ratio of mullite powder and Ludox again, stirs, and obtains an envelope slurry layer slurry; To immerse envelope slurry layer slurry through the backing layer shell of step c preparation again and hang and be coated with slurry, after the proposition, to spread particle diameter be 80 purpose mullite sand, be under 24 ℃ the condition dry 24 hours in temperature, obtains envelope slurry stratotype shell;
E, sintering: will be after the envelope slurry stratotype shell dewaxing of steps d preparation, be 1200 ℃ high temperature kiln roasting 60min in temperature, obtain the shell that the contrast experiment uses.
By HB5352.1-2004 " investment casting shell method for testing performance part 1: the mensuration of bending strength " bending strength of the shell of the titanium alloy moltening mold castings fiber reinforcement thin-walled shell of this test preparation and contrast is measured; Its result is: the bending strength of the titanium alloy moltening mold castings fiber reinforcement thin-walled shell of this test preparation is 6.3MPa under the identical measurement standard, and the intensity of contrast shell is 4.5MPa.The experimental result of contrast shell shows bigger discreteness, mainly is because due to the inhomogeneous difference of fiber.
By HB5352.4-2004 " investment casting shell method for testing performance the 4th part: the mensuration of gas permeability " gas permeability of the shell of the titanium alloy moltening mold castings fiber reinforcement thin-walled shell of this test preparation and contrast is measured, its result is: the gas permeability of the titanium alloy moltening mold castings fiber reinforcement thin-walled shell that this test prepares is 0.08cm
3/ g.min, and the gas permeability of contrast shell is 0.06cm
3/ g.min.
The titanium alloy moltening mold castings fiber reinforcement thin-walled shell of this test preparation and the shell centrifugal casting of contrast cavity filling can test grid; Alloy is Ti-1100 (Ti-6Al-2.75Sn-4Zr-0.4Mo-0.45Si); The Ti-1100 pack completeness that the titanium alloy moltening mold castings fiber reinforcement thin-walled shell that uses this test to prepare obtains is 69%; As shown in Figure 1, the Ti-1100 pack completeness that the shell of use contrast obtains is 36.5%, and is as shown in Figure 2; Comparison diagram 1 can find out that with Fig. 2 the titanium alloy moltening mold castings fiber reinforcement thin-walled shell of this test preparation can improve the cavity filling ability of alloy greatly.
The titanium alloy moltening mold castings fiber reinforcement thin-walled shell of this test preparation and the shell of contrast be centrifugal to water mobile sample.Casting IMI834 (Ti-5.8Al-4Sn-3.5Zr-0.7Nb-0.5M-0.135Si); The IMI834 foundry goods photo that the titanium alloy moltening mold castings fiber reinforcement thin-walled shell for preparing with this test obtains is as shown in Figure 3; IMI834 foundry goods photo with the shell that contrasts obtains is as shown in Figure 4; Comparison diagram 3 can find out that with Fig. 4 the helical length of the titanium alloy moltening mold castings fiber reinforcement thin-walled shell cast of this test preparation is 129mm, and the helical length of the cast of contrast shell is 102mm.Obviously adopt the high-temperature titanium alloy flowability of titanium alloy moltening mold castings fiber reinforcement thin-walled shell cast to improve greatly.
Titanium alloy moltening mold castings fiber reinforcement thin-walled shell is the shell of contrast, and the system shell cycle has shortened 28 hours, the shell weight reduction about 18%, system shell cost has reduced by 15%.
Claims (10)
1. the preparation method of a titanium alloy moltening mold castings fiber reinforcement thin-walled shell is characterized in that the preparation method of titanium alloy moltening mold castings fiber reinforcement thin-walled shell carries out according to the following steps:
One, refractory fibre preliminary treatment: refractory fibre is put into ethanol earlier; Be placed on then and clean 15～30 minutes in the ultrasonic cleaner; And then put into sulfuric acid solution or the hydrochloric acid solution that concentration is 0.5～5mol/L and soaked 5～60 minutes; With washing, drying, accomplish the preliminary treatment of refractory fibre again; Wherein refractory fibre is glass fibre, ceramic fibre or mullite fiber, and the diameter of refractory fibre is 5～30 μ m, and length is 1～15mm;
Two, shell surface layer preparation: the mass ratio by refractory powder and binding agent is (1.8～2.8): 1 joins refractory powder in the binding agent, stirs, and obtains surface layer slurry; Wax-pattern is immersed in the surface layer slurry to hang is coated with, after the proposition, stucco, drying obtain surface shell;
Three, shell transition zone preparation: the refractory fibre that step 1 was handled is 0.5%～5% to join in the binding agent by the quality percentage composition, stirs, and obtains the transition zone agent of prewetting; Mass ratio by refractory powder and binding agent is (1.5～1.8): 1 joins refractory powder in the binding agent, stirs, and obtains the transition zone slurry; To in the surface shell elder generation immersion transition zone of step 2 preparation is prewetted agent, keep 3～30s, and propose shell then, and behind placement 10～60min, immerse transition zone slurry extension again and be coated with slurry, after the proposition, stucco, drying obtain the transition zone shell;
Four, shell backing layer preparation: the refractory fibre that step 1 was handled is 0.5%～10% to join in the binding agent by the quality percentage composition, stirs, and obtains the backing layer agent of prewetting; Mass ratio by refractory powder and binding agent is (1.2-1.6): 1 joins refractory powder in the binding agent, stirs, and obtains the backing layer slurry; The transition zone shell that step 3 is obtained immerses backing layer earlier prewets and keeps 3～30s in the agent, proposes shell then, place 10～60min after; Immerse again to hang in the backing layer slurry and be coated with slurry; After the proposition, stucco, drying are accomplished the preparation of one deck backing layer; Repeat in this step in backing layer is prewetted agent dipping, place, in the backing layer slurry, hang be coated with, stucco and drying process 1～3 time, obtain the backing layer shell;
Five, shell envelope slurry layer preparation: the refractory fibre that step 1 was handled is 0.5%～10% to join in the binding agent by the quality percentage composition, stirs, and obtains envelope and starches the agent of layer prewetting; Mass ratio by refractory powder and binding agent is (1-1.3): 1 joins refractory powder in the binding agent, stirs, and obtains an envelope slurry layer slurry; To in the backing layer shell elder generation immersion envelope slurry layer that step 4 obtains is prewetted agent, keep 3～30s, and propose shell then, behind placement 10～60min, extension is coated with slurry in the slurry of the immersion envelope again layer slurry, after the proposition, and drying, the preparation of completion shell envelope slurry layer;
Six, sintering: will be through the shell of the completion envelope slurry layer preparation of step 5 preparation, after the dewaxing, be high temperature kiln roasting 30～90min of 900～1200 ℃ in temperature, obtain titanium alloy moltening mold castings fiber reinforcement thin-walled shell.
2. the preparation method of a kind of titanium alloy moltening mold castings fiber reinforcement thin-walled shell according to claim 1 is characterized in that the described refractory powder of step 2 is zirconia powder, yittrium oxide powder or alumina powder.
3. the preparation method of a kind of titanium alloy moltening mold castings fiber reinforcement thin-walled shell according to claim 1 and 2 is characterized in that the binding agent described in the step 2 is Ludox, silester or zirconium colloidal sol.
4. the preparation method of a kind of titanium alloy moltening mold castings fiber reinforcement thin-walled shell according to claim 1 and 2 is characterized in that the sand in the step 2 stucco is oxidation zircon sand, aluminum oxide sand or yttrium oxide sand.
5. the preparation method of a kind of titanium alloy moltening mold castings fiber reinforcement thin-walled shell according to claim 1 and 2 is characterized in that step 3, the refractory powder described in four and five are mullite powder, colliery powder or kaolin.
6. the preparation method of a kind of titanium alloy moltening mold castings fiber reinforcement thin-walled shell according to claim 1 and 2 is characterized in that the sand in the stucco is mullite sand, bastard coal stone sand or kaolin sand in the step 3, four and five.
7. the preparation method of a kind of titanium alloy moltening mold castings fiber reinforcement thin-walled shell according to claim 1 and 2; When it is characterized in that the shell backing layer described in the step 4 is dry; The relative humidity of environment is 40%～60%, and temperature is 22～26 ℃, and be 10～14h drying time.
8. the preparation method of a kind of titanium alloy moltening mold castings fiber reinforcement thin-walled shell according to claim 1 and 2; The quality percentage composition of refractory fibre is 0.8%～3% of a binding agent in the agent to it is characterized in that prewetting filter course in the step 3, and the mass ratio of refractory powder and binding agent is (1.55～1.75) in the filter course slurry: 1.
9. the preparation method of a kind of titanium alloy moltening mold castings fiber reinforcement thin-walled shell according to claim 1 and 2; The quality percentage composition of refractory fibre is 2%～8% of a binding agent in the agent to it is characterized in that prewetting backing layer in the step 4, and the mass ratio of refractory powder and binding agent is (1.3-1.5) in the backing layer slurry: 1.
10. the preparation method of a kind of titanium alloy moltening mold castings fiber reinforcement thin-walled shell according to claim 1 and 2; The quality percentage composition of refractory fibre is 2%～8% of a binding agent in the agent to it is characterized in that in the step 5 prewetting envelope slurry layer, and the mass ratio of refractory powder and binding agent is (1.1～1.2) in the envelope slurry layer slurry: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100686182A CN102527937A (en) | 2012-03-15 | 2012-03-15 | Method for preparing fiber-reinforced thin-wall shell for casting titanium alloy smelting mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100686182A CN102527937A (en) | 2012-03-15 | 2012-03-15 | Method for preparing fiber-reinforced thin-wall shell for casting titanium alloy smelting mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102527937A true CN102527937A (en) | 2012-07-04 |
Family
ID=46336656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100686182A Pending CN102527937A (en) | 2012-03-15 | 2012-03-15 | Method for preparing fiber-reinforced thin-wall shell for casting titanium alloy smelting mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102527937A (en) |
Cited By (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102836963A (en) * | 2012-09-09 | 2012-12-26 | 安徽厚林精密金属科技有限公司 | Support casting process |
| CN103600030A (en) * | 2013-08-30 | 2014-02-26 | 泰州枫叶冶金设备有限公司 | Preparation method of heat-resisting alloy sliding-block shell by investment casting |
| CN103639359A (en) * | 2013-11-01 | 2014-03-19 | 南昌航空大学 | Preparation method of composite fiber enhanced fusible pattern precision casting shell |
| CN103962506A (en) * | 2014-04-11 | 2014-08-06 | 内蒙古工业大学 | Preparation method of fiber reinforced compound silica sol shell for investment casting |
| CN104368748A (en) * | 2014-11-07 | 2015-02-25 | 贵州安吉航空精密铸造有限责任公司 | Investment casting shell molding process |
| CN104399885A (en) * | 2014-10-28 | 2015-03-11 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for increasing permeability of investment cast ceramic shell |
| CN104884186A (en) * | 2012-12-28 | 2015-09-02 | 花王株式会社 | Method for producing structure for casting and structure such as mold |
| CN105290335A (en) * | 2015-11-11 | 2016-02-03 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for improving formability of ceramic mold core |
| CN105537518A (en) * | 2015-12-30 | 2016-05-04 | 青岛博泰美联化工技术有限公司 | Preparation method of engine component |
| CN105834361A (en) * | 2016-04-01 | 2016-08-10 | 江苏大学 | Method for preparing modified ceramic mold shell through special-shaped cross section short carbon fibers |
| CN106914587A (en) * | 2017-01-10 | 2017-07-04 | 浙江美德光学有限公司 | A kind of processing technology of precision-investment casting housing |
| CN107186172A (en) * | 2017-05-25 | 2017-09-22 | 西北工业大学 | A kind of painting hanging method of titanium-base alloy investment casting shell backing layer |
| 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 |
| CN108031789A (en) * | 2017-12-14 | 2018-05-15 | 嘉兴市亚达特种钢铸造有限公司 | Height shelling property silicasol case process for making shell |
| CN108213344A (en) * | 2018-01-30 | 2018-06-29 | 内蒙古工业大学 | Air-flow placed prepares the apparatus and method of fiber reinforcement Ludox composite shell |
| CN108405805A (en) * | 2018-04-28 | 2018-08-17 | 佛山市高明利钢精密铸造有限公司 | A kind of preparation method of the stainless steel casting shell with internal multi-cellular structure |
| CN108580806A (en) * | 2018-04-28 | 2018-09-28 | 佛山市高明利钢精密铸造有限公司 | A kind of preparation method of precision stainless steel casting shell |
| CN109108225A (en) * | 2018-09-03 | 2019-01-01 | 芜湖正科精密机械制造有限公司 | A kind of hot investment casting three and half manufacturing process of shell mold |
| CN109475928A (en) * | 2016-07-22 | 2019-03-15 | 赛峰集团 | A method of for manufacturing shell mold |
| CN110090921A (en) * | 2019-04-24 | 2019-08-06 | 广东阿诺诗厨卫有限公司 | Large area thin-wall part casting method |
| CN110405134A (en) * | 2019-08-26 | 2019-11-05 | 上海大学 | A kind of high-strength composite fiber ceramics shell and preparation method thereof |
| CN110434288A (en) * | 2019-08-26 | 2019-11-12 | 沃尔曼科技张家港有限公司 | A kind of fiber ceramics shell and preparation method thereof |
| CN110625067A (en) * | 2019-11-08 | 2019-12-31 | 含山县能华铸造有限公司 | Preparation method of high-temperature-resistant anti-bonding investment casting shell |
| CN110640083A (en) * | 2019-09-28 | 2020-01-03 | 安徽慧枫再生资源科技有限公司 | Preparation method of slurry for aluminum alloy investment casting shell |
| CN110814287A (en) * | 2019-10-22 | 2020-02-21 | 东风精密铸造安徽有限公司 | Shell manufacturing method for composite precision casting silica sol shell |
| CN112589052A (en) * | 2020-12-04 | 2021-04-02 | 杨开发 | Process for manufacturing precision casting silica sol shell |
| CN112605342A (en) * | 2020-12-15 | 2021-04-06 | 鹰普航空科技有限公司 | Forming method of small-sized thin-wall stainless steel casting with complex cavity |
| CN114074177A (en) * | 2020-08-12 | 2022-02-22 | 沈阳铸造研究所有限公司 | Preparation method of investment precision casting shell for brittle material |
| CN114833305A (en) * | 2022-05-18 | 2022-08-02 | 上海交通大学 | Farfugium japonicum fiber reinforced ceramic shell-back layer slurry and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85105348A (en) * | 1985-06-27 | 1986-12-24 | 青岛化工学院 | New method of the sclerosis of Ludox and the application in precision-investment casting system shell thereof |
| CN102151787A (en) * | 2011-05-30 | 2011-08-17 | 哈尔滨工业大学 | 600-DEG C high-temperature titanium alloy fired mold casting type shell surface painting and preparation method thereof |
-
2012
- 2012-03-15 CN CN2012100686182A patent/CN102527937A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85105348A (en) * | 1985-06-27 | 1986-12-24 | 青岛化工学院 | New method of the sclerosis of Ludox and the application in precision-investment casting system shell thereof |
| CN102151787A (en) * | 2011-05-30 | 2011-08-17 | 哈尔滨工业大学 | 600-DEG C high-temperature titanium alloy fired mold casting type shell surface painting and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 陈冰: "聚合物和纤维增强硅溶胶-国外精铸技术进展述评(4)", 《特种铸造及有色合金》 * |
Cited By (35)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102836963A (en) * | 2012-09-09 | 2012-12-26 | 安徽厚林精密金属科技有限公司 | Support casting process |
| 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 |
| US9719211B2 (en) | 2012-12-28 | 2017-08-01 | Kao Corporation | Method of producing structure for producing casting, and structure such as mold |
| CN104884186A (en) * | 2012-12-28 | 2015-09-02 | 花王株式会社 | Method for producing structure for casting and structure such as mold |
| CN103600030A (en) * | 2013-08-30 | 2014-02-26 | 泰州枫叶冶金设备有限公司 | Preparation method of heat-resisting alloy sliding-block shell by investment casting |
| CN103639359A (en) * | 2013-11-01 | 2014-03-19 | 南昌航空大学 | Preparation method of composite fiber enhanced fusible pattern precision casting shell |
| CN103962506A (en) * | 2014-04-11 | 2014-08-06 | 内蒙古工业大学 | Preparation method of fiber reinforced compound silica sol shell for investment casting |
| CN104399885A (en) * | 2014-10-28 | 2015-03-11 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for increasing permeability of investment cast ceramic shell |
| CN104368748A (en) * | 2014-11-07 | 2015-02-25 | 贵州安吉航空精密铸造有限责任公司 | Investment casting shell molding process |
| CN105290335A (en) * | 2015-11-11 | 2016-02-03 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for improving formability of ceramic mold core |
| CN105290335B (en) * | 2015-11-11 | 2018-07-31 | 沈阳黎明航空发动机(集团)有限责任公司 | A method of improving ceramic core mouldability |
| CN105537518A (en) * | 2015-12-30 | 2016-05-04 | 青岛博泰美联化工技术有限公司 | Preparation method of engine component |
| CN105834361A (en) * | 2016-04-01 | 2016-08-10 | 江苏大学 | Method for preparing modified ceramic mold shell through special-shaped cross section short carbon fibers |
| CN109475928A (en) * | 2016-07-22 | 2019-03-15 | 赛峰集团 | A method of for manufacturing shell mold |
| CN106914587A (en) * | 2017-01-10 | 2017-07-04 | 浙江美德光学有限公司 | A kind of processing technology of precision-investment casting housing |
| CN107186172A (en) * | 2017-05-25 | 2017-09-22 | 西北工业大学 | A kind of painting hanging method of titanium-base alloy investment casting shell backing layer |
| CN107186172B (en) * | 2017-05-25 | 2019-05-10 | 西北工业大学 | A kind of painting hanging method of titanium-base alloy investment casting shell backing layer |
| 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 |
| CN108031789A (en) * | 2017-12-14 | 2018-05-15 | 嘉兴市亚达特种钢铸造有限公司 | Height shelling property silicasol case process for making shell |
| CN108213344A (en) * | 2018-01-30 | 2018-06-29 | 内蒙古工业大学 | Air-flow placed prepares the apparatus and method of fiber reinforcement Ludox composite shell |
| CN108213344B (en) * | 2018-01-30 | 2019-08-06 | 内蒙古工业大学 | The apparatus and method of air-flow laying preparation fiber reinforcement silica solution composite shell |
| CN108580806A (en) * | 2018-04-28 | 2018-09-28 | 佛山市高明利钢精密铸造有限公司 | A kind of preparation method of precision stainless steel casting shell |
| CN108405805A (en) * | 2018-04-28 | 2018-08-17 | 佛山市高明利钢精密铸造有限公司 | A kind of preparation method of the stainless steel casting shell with internal multi-cellular structure |
| CN109108225A (en) * | 2018-09-03 | 2019-01-01 | 芜湖正科精密机械制造有限公司 | A kind of hot investment casting three and half manufacturing process of shell mold |
| CN110090921A (en) * | 2019-04-24 | 2019-08-06 | 广东阿诺诗厨卫有限公司 | Large area thin-wall part casting method |
| CN110434288A (en) * | 2019-08-26 | 2019-11-12 | 沃尔曼科技张家港有限公司 | A kind of fiber ceramics shell and preparation method thereof |
| CN110405134A (en) * | 2019-08-26 | 2019-11-05 | 上海大学 | A kind of high-strength composite fiber ceramics shell and preparation method thereof |
| CN110640083A (en) * | 2019-09-28 | 2020-01-03 | 安徽慧枫再生资源科技有限公司 | Preparation method of slurry for aluminum alloy investment casting shell |
| CN110814287A (en) * | 2019-10-22 | 2020-02-21 | 东风精密铸造安徽有限公司 | Shell manufacturing method for composite precision casting silica sol shell |
| CN110625067A (en) * | 2019-11-08 | 2019-12-31 | 含山县能华铸造有限公司 | Preparation method of high-temperature-resistant anti-bonding investment casting shell |
| CN114074177A (en) * | 2020-08-12 | 2022-02-22 | 沈阳铸造研究所有限公司 | Preparation method of investment precision casting shell for brittle material |
| CN114074177B (en) * | 2020-08-12 | 2023-08-15 | 沈阳铸造研究所有限公司 | Preparation method of investment precision casting shell for brittle material |
| CN112589052A (en) * | 2020-12-04 | 2021-04-02 | 杨开发 | Process for manufacturing precision casting silica sol shell |
| CN112605342A (en) * | 2020-12-15 | 2021-04-06 | 鹰普航空科技有限公司 | Forming method of small-sized thin-wall stainless steel casting with complex cavity |
| CN114833305A (en) * | 2022-05-18 | 2022-08-02 | 上海交通大学 | Farfugium japonicum fiber reinforced ceramic shell-back layer slurry and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102527937A (en) | Method for preparing fiber-reinforced thin-wall shell for casting titanium alloy smelting mold | |
| CN101462151B (en) | Method for preparing TiAl-based alloy formwork by precision-investment casting | |
| CN103962506B (en) | The preparation method of moltening mold castings fiber-reinforced composite silicasol case | |
| CN203737936U (en) | Fiber-reinforced investment casting composite shell | |
| Jones et al. | Advances in shell moulding for investment casting | |
| CN106493287B (en) | The casting preparation method of yttrium oxide shell | |
| CN105290313B (en) | A kind of method for improving titanium-aluminium alloy hot investment casting New Oxide Ceramic Shell Mould deformability | |
| CN102151787A (en) | 600-DEG C high-temperature titanium alloy fired mold casting type shell surface painting and preparation method thereof | |
| CN202367168U (en) | Automatic slurry dipping and sand spraying machine | |
| CN104028699B (en) | A kind of preparation method of stator inner ring separate assembling hollow ceramic core | |
| CN103639359B (en) | A kind of preparation method based on composite fibre enhancing precision investment casting mould case | |
| CN103286269B (en) | Long rod type investment shell manufacturing process | |
| CN103071764B (en) | For the CaZrO of titanium or titanium alloy hot investment casting 3the preparation method of shell | |
| WO2023103209A1 (en) | Preparation method for modified carbon fiber-toughened alumina self-healing ceramic | |
| CN102091757A (en) | Integral precision casting method for large thin-wall casing part | |
| CN104907495A (en) | Preparation method of TiAl alloy investment casting shell | |
| CN102366819A (en) | Method for precision casting of titanium alloy | |
| CN110227797B (en) | Preparation process of three-dimensional printing ceramic shell for titanium alloy casting | |
| CN102601307A (en) | Preparation method of shell mold for investment casting of TiAl based alloy | |
| CN101927321A (en) | Method for preparing high-air permeability and high-strength ceramic shell mold for anti-gravity casting | |
| Tu et al. | Fabrication and characterization of high-strength water-soluble composite salt core for zinc alloy die castings | |
| CN102950251A (en) | Anti-interface reaction composite ceramic shell | |
| CN101954454A (en) | Method for eliminating casting heating cracks | |
| CN114074177B (en) | Preparation method of investment precision casting shell for brittle material | |
| CN113463187B (en) | Preparation method of light-weight lattice structure single crystal high-temperature 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 | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120704 |