CN102632223A - Surface tin-adhesion-proof method for directionally freezing blade by liquid metal cooling - Google Patents
Surface tin-adhesion-proof method for directionally freezing blade by liquid metal cooling Download PDFInfo
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- CN102632223A CN102632223A CN2012101301558A CN201210130155A CN102632223A CN 102632223 A CN102632223 A CN 102632223A CN 2012101301558 A CN2012101301558 A CN 2012101301558A CN 201210130155 A CN201210130155 A CN 201210130155A CN 102632223 A CN102632223 A CN 102632223A
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Abstract
The invention relates to a surface tin-adhesion-proof method for directionally freezing a blade by liquid metal cooling and belongs to the technical field of high-temperature alloys. One ring of high-smelting-point metal sheet with a certain thickness is embedded on the periphery of a graining section wax mould of the blade; one part of the metal sheet is exposed out of the outer surface of the graining section wax mould; and one part of the metal sheet is inserted into the graining section wax mould. After the wax mould is coated to make a shell, the wax mould is removed and the metal sheet is embedded on a mould shell. In a blade freezing process, when alloy liquid starts to be frozen into the position of the metal sheet from a water cooling disc, a closed structure is formed by the frozen casting piece part, the metal sheet and the mould shell; the structure can prevent the tin-adhesion phenomenon caused by situation that tin liquid penetrates into the part above the metal sheet from a gap formed between the mould shell and the frozen alloy so that the tin liquid wets the surface of a casting piece above the metal sheet or is contacted with the surface, so as to guarantee the surface quality of the blade; and the tin-adhesion-proof effect is good.
Description
Technical field
The invention belongs to the high temperature alloy technical field, particularly the preparation technology of high temperature alloy directional solidification blade.
Background technology
The high-performance high-temperature alloy blades adopts the apparatus for directional solidification preparation usually.Directional solidification is a kind of process that from melt, directionally grows crystal, and the progress of directional solidification technique and single crystal technology has played great facilitation to the development of high temperature alloy.The directional solidification main method has exothermic mixture method (EP), power to reduce method (PD), high speed freezing method (HRS), liquid metal cooling method (LMC), fluidised form bed cooling method (FBQ), zone melting liquid metal cooling method (ZMLMC) and gas cooling technology methods such as (GCC).
At present, the directional solidification of nickel base superalloy mainly adopts the high speed freezing method (High Rate Solidification is HRS) with liquid metal cooling (Liquid Metal Cooling, LMC) method.Traditional HRS method improves thermograde through the mode that moves shell mould.Concrete mode is for to place formwork on the water-cooled chassis, and with radiation baffle the hot-zone isolated out, and after crystal growth began, shell mould was passed through radiation baffle with pre-set velocity and shifted out from the hot-zone.And the distinguishing feature of LMC technology is to utilize liquid metal as cooling medium, substitutes the transfer of heat that common heat radiation mode quickens to solidify part (being solid phase area) through the heat conduction, and the solidification processing temperature gradient is significantly improved.With respect to the HRS technology, LMC techniques make use liquid metal is as cooling medium, and the solidification processing temperature gradient significantly improves, and possibly obtain defective single crystal organization still less like this, improves the mechanical property and the environmental performance of alloy.In addition, the advantage of LMC shows that also the control that enlarges freezing rate selects scope, not only can control alloy organizing and performance through the improvement of technology, and save setting time, the simplification production process.The 1980s; Russia's beginning is the undersized orientation of LMC device fabrication and the single crystal casting of cooling medium in order to liquid metal Al, with respect to being the LMC of cooling medium with Al, is that the LMC of cooling medium more has superiority with Sn; Cooling effect is better, can obtain higher thermograde.This kind cooling medium has been widely used in the commercial production of blade abroad; But this kind medium also has problems; That is exactly in the blade process of setting; Because formwork and solidify after alloy between have certain slight void, liquid metal tin can be through being penetrated in this space under the effect of static pressure and capillary force, and then can be bonded in the surface of blade.Tin not only can damage the performance of blade alloy, but also the surface quality of blade is seriously descended, and when serious blade is scrapped.Therefore, how to prevent that the sticking tin of column crystal or single crystal blade from being that liquid metal cooling directional freeze method prepares the problem that blade must solve.
Summary of the invention
Goal of the invention:
The present invention relates to the antiseized tin method of a kind of liquid metal cooling directional solidification blade surface, its objective is the blades oriented solidifying process method of developing a kind of simple possible, prevent that blade surface from gluing tin, and then improve the surface quality of blade.
Technical scheme:
The present invention realizes through following technical scheme:
The antiseized tin method of a kind of liquid metal cooling directional solidification blade surface; It is characterized in that: be inlaid with in the periphery of the graining section wax-pattern of blade and have certain thickness refractory metal sheet; A sheet metal part is exposed at graining section wax-pattern outside, and a part injects in the graining section wax-pattern; Behind the wax-pattern coating system shell, remove wax-pattern, sheet metal just is embedded on the formwork; In blade cast and later process of setting; When alloy liquid when aqueous cold plate begins to be solidified to the sheet metal position; The foundry goods that solidified part and sheet metal and formwork form and can stop that tin liquor is penetrated into sheet metal and makes tin liquor and sheet metal with the infiltration of top cast(ing) surface or contact and cause the enclosed construction that glues the tin phenomenon with top along the gap that formwork and solidified superalloy form; This structure below is an aqueous cold plate; The aqueous cold plate top is a formwork, and formwork inside is alloy liquid, and then has guaranteed the surface quality of blade.
The material of sheet metal is and on all four alloy of blade material or stainless steel material; Processing need be polished in the surface of sheet metal, and the surface does not have oxide layer and other impurity to exist; Sheet metal need carry out clean before being installed to graining section wax-pattern.
The thickness of sheet metal is between the 2-5 millimeter, and the degree of depth that sheet metal inserts formwork is the 3-8 millimeter, and the length of exposing formwork is the 2-5 millimeter.
The length of graining section wax-pattern is the 10-30 millimeter, and the setting height(from bottom) of sheet metal is lower than the maximum length of graining section wax-pattern.
Carry out guaranteeing in the process of alloy cast that sheet metal can not be by whole fusings, to guarantee alloy liquid Quench rapid solidification and partly form enclosed construction on sheet metal with formwork and the foundry goods that solidified.
During wax-pattern coating system shell, the formwork investment precoat adopts schmigel and Ludox material preparation, and the shell mould material adopts zirconium English powder, schmigel or the preparation of electrofused mullite powder.
Ludox is 8-20nm for the micelle radius, and dioxide-containing silica is 30%-35%.
The powder liquid mass ratio of formwork investment precoat is 3.2-3.5:1.
The material of aqueous cold plate is a stainless steel.
The material of directional solidification blade is orientation or monocrystal nickel-base high-temperature alloy.
Advantage and effect:
The present invention relates to the antiseized tin method of a kind of liquid metal cooling directional solidification blade surface, have following advantage:
In the process that blade solidifies; When alloy liquid when aqueous cold plate begins to be solidified to the sheet metal position; The foundry goods part of having solidified has just formed enclosed construction with sheet metal and formwork; This enclosed construction can stop effectively that tin liquor is penetrated into sheet metal and makes tin liquor and sheet metal with the infiltration of top cast(ing) surface or contact to cause and glue the tin phenomenon with top along the gap that formwork and solidified superalloy form; And then having guaranteed the surface quality of blade effectively, technology is simple, feasibility is high, the antiseized tin of blade surface is effective.
Description of drawings:
Fig. 1 is the antiseized tin structural principle of a directional solidification of the present invention sketch map;
Fig. 2 is the antiseized tin structural representation of single crystal casting;
Fig. 3 is the antiseized tin structural representation of directed foundry goods.
The specific embodiment:
Below in conjunction with accompanying drawing and concrete embodiment the present invention is done further explanation, but protection scope of the present invention does not receive the restriction of embodiment.
With tin (Sn) is that the LMC cooling effect of cooling medium is better, can obtain higher thermograde.But in the blade process of setting; There is certain slight void owing to formwork and between the alloy after solidifying; Liquid metal tin can be through being penetrated in this space under the effect of static pressure and capillary force, and then can be bonded in the surface of blade, not only can damage the performance of blade alloy; But also the surface quality of blade is seriously descended, when serious blade is scrapped.
In order to address the above problem, the present invention proposes the antiseized tin method of a kind of liquid metal cooling directional solidification blade surface, the antiseized tin structure of directional solidification below is an aqueous cold plate 3, and aqueous cold plate 3 tops are formwork 1, and formwork 1 inside is alloy liquid 2; Be inlaid with in the periphery of the graining section wax-pattern 5 of blade and have certain thickness high-melting point metal sheet 4, sheet metal 4 parts are exposed at graining section wax-pattern 5 outsides, and a part injects in the graining section wax-pattern 5; Behind the wax-pattern coating system shell, remove wax-pattern, sheet metal 4 just is embedded on the formwork 1;
In the blade process of setting; When alloy liquid 2 when aqueous cold plate 3 begins to be solidified to sheet metal 4 positions; The foundry goods part 7 of having solidified forms enclosed construction with sheet metal 4 and formwork 1; This structure can stop that tin liquor 6 is penetrated into sheet metal 4 and makes tin liquor 6 and sheet metal 4 with the infiltration of top cast(ing) surface or contact to cause and glue the tin phenomenon with top along the gap that formwork 1 and solidified superalloy form, and then has guaranteed the surface quality of blade.
The material of sheet metal 4 is and on all four alloy of blade material or stainless steel material; Processing need be polished in the surface of sheet metal 4, and the surface does not have oxide layer and other impurity to exist; Sheet metal 4 need carry out clean before being installed to graining section wax-pattern 5.
The thickness of sheet metal 4 is between the 2-5 millimeter, and the degree of depth that sheet metal 4 inserts formwork 1 is the 3-8 millimeter, and the length of exposing formwork is the 2-5 millimeter.
The employing injection molding prepares wax-pattern and spiral crystal selector or prepares wax-pattern (comprising graining section wax-pattern); Injection temperature is 63-68 ℃; Pressure is 0.3-0.4MPa, and be 10-25 second inject time, and the dwell time is 15-30 second; Just crystal selector 8, running gate system and wax-pattern combine (directed foundry goods does not have crystal selector, and single crystal casting has crystal selector) then.
Carry out guaranteeing in the process of alloy cast that sheet metal can not be by whole fusings, to guarantee alloy liquid Quench rapid solidification and form enclosed constructions on sheet metal with the formwork 1 and the foundry goods part 7 of having solidified.
During wax-pattern coating system shell, formwork 1 investment precoat adopts schmigel and Ludox material preparation, and the shell mould material adopts zirconium English powder, schmigel or the preparation of electrofused mullite powder.
Ludox is 8-20nm for the micelle radius, and dioxide-containing silica is 30%-35%.
The powder liquor ratio of formwork 1 investment precoat is that the ratio of schmigel and Ludox is 3.2-3.5:1 (mass ratio).
The material of aqueous cold plate 3 is a stainless steel, does not react to guarantee itself and metal tin liquor.
The material of directional solidification blade is orientation or monocrystal nickel-base high-temperature alloy.
Preparation DD4 single crystal casting: adopt injection molding to prepare wax-pattern, graining section and spiral crystal selector; Wax-pattern, graining section and crystal selector injection temperature are 63 ℃, and pressure is 0.3MPa, and be 10 seconds inject time, and the dwell time is 30 seconds; Then crystal selector, graining section, running gate system and wax-pattern are combined; 15 millimeters of graining segment lengths, be 10 millimeters away from crystal selector top places along the circumferential direction assemble layer of metal sheet 4, sheet thicknesses is 2 millimeters; Material is the DD4 alloy sheet; The degree of depth that sheet metal inserts formwork is 3 millimeters, and the length of exposing formwork is 5 millimeters, and concrete structure is seen Fig. 2; Carry out coating system shell then, investment precoat adopts schmigel (320 order) and silicon sol solution preparation, and the powder liquor ratio is 3.5:1, and the Ludox particle diameter is 10 nanometers, and concentration is 32%, carries out drying, 8 hours drying times behind the ground floor coating at ambient temperature; Dusting behind the second layer coating, dusting material are 80 order schmigels, 8 hours drying times; The dusting material is 60 order schmigels behind the 3rd coating, and be 8 hours drying time; The dusting material is 32 order schmigels behind the 4th coating, and be 8 hours drying time; The 5th-layer 7 is that the dusting material is 24 order schmigels behind the coating, and be 8 hours drying time, and envelope slurry layer adopts investment precoat at last, and be 5 hours drying time; After formwork is coated with the material process completion, adopt steaming process to remove wax-pattern, vapor (steam) temperature is 150 ℃, and the time is 20 minutes; After the formwork dewaxing formwork is put into roaster and carry out roasting, sintering temperature is 980 ℃, and temperature retention time is 3 hours, and stove is chilled to room temperature and cleans; Formwork is placed in the directed stove on the aqueous cold plate, and the water-cooled chassis material is a stainless steel, and last district is preheating to 1550 ℃, and inferior segment is preheating to 1600 ℃, and the DD4 single crystal alloy is melted in smelting furnace, and the alloy pouring temperature is 1500 ℃; Begin crystal-pulling after cast finishes, pulling rate is 6 mm/min, draws the back that finishes with the stove cooling, takes out then.After formwork is removed, obtain the finished product cast of any surface finish, antiseized tin is effective.
Preparation DD6 single crystal casting: adopt injection molding to prepare wax-pattern and spiral crystal selector; Wax-pattern and crystal selector injection temperature are 65 ℃, and pressure is 0.4MPa, and be 20 seconds inject time, and the dwell time is 15 seconds; Then crystal selector, graining section, running gate system and wax-pattern are combined; 20 millimeters of graining segment lengths, be 8 millimeters away from crystal selector top places along the circumferential direction assemble layer of metal sheet 4,3 millimeters of the thickness of sheet metal, material is the DD6 alloy sheet, the degree of depth that sheet metal inserts formwork is 4 millimeters, the length of exposing formwork is 2 millimeters; Carry out coating system shell then, investment precoat adopts schmigel (320 order) and silicon sol solution preparation, and the powder liquor ratio is 3.2:1, and the Ludox particle diameter is 8 nanometers, and concentration is 34%, carries out drying, 5 hours drying times behind the ground floor coating at ambient temperature; Dusting behind the second layer coating, dusting material are 80 order schmigels, 6 hours drying times; The dusting material is 60 order schmigels behind the 3rd coating, and be 8 hours drying time; The dusting material is 32 order schmigels behind the 4th coating, and be 8 hours drying time; The 5th-layer 7 is that the dusting material is 24 order schmigels behind the coating, and be 8 hours drying time, and envelope slurry layer adopts investment precoat at last, and be 5 hours drying time; After formwork is coated with the material process completion, adopt steaming process to remove wax-pattern, vapor (steam) temperature is 160 ℃, and the time is 30 minutes; After the formwork dewaxing formwork is put into roaster and carry out roasting, sintering temperature is 1000 ℃, and temperature retention time is 4 hours, and stove is chilled to room temperature and cleans; Formwork is placed in the directed stove on the aqueous cold plate, and the water-cooled chassis material is a stainless steel,, last district is preheating to 1550 ℃, and inferior segment is preheating to 1600 ℃, and the DD6 single crystal alloy is melted in smelting furnace, and the alloy pouring temperature is 1500 ℃; Begin crystal-pulling after cast finishes, pulling rate is 8 mm/min, draws the back that finishes with the stove cooling, takes out then.After formwork is removed, obtain the finished product cast of any surface finish, antiseized tin is effective.
Embodiment 3
Preparation directionally solidified alloy foundry goods: adopt injection molding to prepare wax-pattern (comprising graining section wax-pattern); The wax-pattern injection temperature is 65 ℃, and pressure is 0.4MPa, and be 15 seconds inject time, and the dwell time is 30 seconds; 25 millimeters of graining segment lengths are along the circumferential direction assembling layer of metal sheet 4 from 10 millimeters places, graining section top, 2 millimeters of the thickness of sheet metal, and material is the DZ125 alloy sheet.The degree of depth that sheet metal inserts formwork is 4 millimeters, and the length of exposing formwork is 4 millimeters, and concrete structure is seen Fig. 3; Carry out coating system shell then, investment precoat adopts schmigel (320 order) and silicon sol solution preparation, and the powder liquor ratio is 3.3:1, and the Ludox particle diameter is 12 nanometers, and concentration is 35%, carries out drying, 6 hours drying times behind the ground floor coating at ambient temperature; Dusting behind the second layer coating, dusting material are 80 order zirconium English powder, 6 hours drying times; The dusting material is 60 order zirconium English powder behind the 3rd coating, and be 6 hours drying time; The dusting material is 32 order zirconium English powder behind the 4th coating, and be 6 hours drying time; The 5th-layer 7 is that the dusting material is 24 order zirconium English powder behind the coating, and be 6 hours drying time, and envelope slurry layer adopts investment precoat at last, and be 5 hours drying time; After formwork is coated with the material process completion, adopt steaming process to remove wax-pattern, vapor (steam) temperature is 160 ℃, and the time is 30 minutes; After the formwork dewaxing formwork is put into roaster and carry out roasting, sintering temperature is 1050 ℃, and temperature retention time is 4 hours, and stove is chilled to room temperature and cleans; Formwork is placed in the directed stove on the aqueous cold plate, and the water-cooled chassis material is a stainless steel, and last district is preheating to 1520 ℃, and inferior segment is preheating to 1550 ℃, and the DZ125 directionally solidified alloy is melted in smelting furnace, and the alloy pouring temperature is 1500 ℃; Begin crystal-pulling after cast finishes, pulling rate is 3 mm/min, draws the back that finishes with the stove cooling, takes out then.After formwork is removed, obtain the finished product cast of any surface finish, antiseized tin is effective.
Preparation directionally solidified alloy foundry goods: adopt injection molding to prepare wax-pattern (comprising wax-pattern graining section); The wax-pattern injection temperature is 68 ℃, and pressure is 0.4MPa, and be 25 seconds inject time, and the dwell time is 20 seconds; 30 millimeters of graining segment lengths are along the circumferential direction assembling layer of metal sheet 4 from 5 millimeters places, graining section top, 2 millimeters of the thickness of sheet metal, and material is the DZ125L alloy sheet, and the degree of depth that sheet metal inserts formwork is 4 millimeters, and the length of exposing formwork is 2 millimeters; Carry out coating system shell then, investment precoat adopts schmigel (320 order) and silicon sol solution preparation, and the powder liquor ratio is 3.4:1, and Ludox particle diameter 8 nanometers, concentration are 30%, carry out drying, 6 hours drying times behind the ground floor coating at ambient temperature; Dusting behind the second layer coating, dusting material are 80 order mullite powder, 6 hours drying times; The dusting material is 60 order mullite powder behind the 3rd coating, and be 6 hours drying time; The dusting material is 32 order mullite powder behind the 4th coating, and be 6 hours drying time; The 5th-layer 7 is that the dusting material is 24 order mullite powder behind the coating, and be 6 hours drying time, and envelope slurry layer adopts investment precoat at last, and be 5 hours drying time; After formwork is coated with the material process completion, adopt steaming process to remove wax-pattern, vapor (steam) temperature is 160 ℃, and the time is 25 minutes; After the formwork dewaxing formwork is put into roaster and carry out roasting, sintering temperature is 1080 ℃, and temperature retention time is 3 hours, and stove is chilled to room temperature and cleans; Formwork is placed in the directed stove on the stainless steel water cold dish, and last district is preheating to 1530 ℃, and inferior segment is preheating to 1550 ℃, and the DZ125L directionally solidified alloy is melted in smelting furnace, and the alloy pouring temperature is 1550 ℃; Begin crystal-pulling after cast finishes, pulling rate is 5 mm/min, draws the back that finishes with the stove cooling, takes out then.After formwork is removed, obtain the finished product cast of any surface finish, antiseized tin is effective.
Preparation directionally solidified alloy foundry goods: adopt injection molding to prepare wax-pattern (comprising wax-pattern graining section); The wax-pattern injection temperature is 68 ℃, and pressure is 0.4MPa, and be 25 seconds inject time, and the dwell time is 20 seconds; 10 millimeters of graining segment lengths are along the circumferential direction assembling layer of metal sheet 4 from 6 millimeters places, graining section top, 2 millimeters of the thickness of sheet metal, and material is the DZ125L alloy sheet, and the degree of depth that sheet metal inserts formwork is 4 millimeters, and the length of exposing formwork is 2 millimeters; Carry out coating system shell then, investment precoat adopts schmigel (320 order) and silicon sol solution preparation, and the powder liquor ratio is 3.4:1, and Ludox particle diameter 20 nanometers, concentration are 30%, carry out drying, 6 hours drying times behind the ground floor coating at ambient temperature; Dusting behind the second layer coating, dusting material are 80 order mullite powder, 6 hours drying times; The dusting material is 60 order mullite powder behind the 3rd coating, and be 6 hours drying time; The dusting material is 32 order mullite powder behind the 4th coating, and be 6 hours drying time; The 5th-layer 7 is that the dusting material is 24 order mullite powder behind the coating, and be 6 hours drying time, and envelope slurry layer adopts investment precoat at last, and be 5 hours drying time; After formwork is coated with the material process completion, adopt steaming process to remove wax-pattern, vapor (steam) temperature is 160 ℃, and the time is 25 minutes; After the formwork dewaxing formwork is put into roaster and carry out roasting, sintering temperature is 1080 ℃, and temperature retention time is 3 hours, and stove is chilled to room temperature and cleans; Formwork is placed in the directed stove on the stainless steel water cold dish, and last district is preheating to 1530 ℃, and inferior segment is preheating to 1550 ℃, and the DZ125L directionally solidified alloy is melted in smelting furnace, and the alloy pouring temperature is 1550 ℃; Begin crystal-pulling after cast finishes, pulling rate is 5 mm/min, draws the back that finishes with the stove cooling, takes out then.After formwork is removed, obtain the finished product cast of any surface finish.
Claims (10)
1. a liquid metal cools off the antiseized tin method of directional solidification blade surface; It is characterized in that: be inlaid with in the periphery of the graining section wax-pattern (5) of blade and have certain thickness refractory metal sheet (4); Sheet metal (a 4) part is exposed at graining section wax-pattern (5) outside, and a part injects in the graining section wax-pattern (5); Behind the wax-pattern coating system shell, remove wax-pattern, sheet metal (4) just is embedded on the formwork (1); In blade cast and later process of setting; When alloy liquid (2) when aqueous cold plate (3) begins to be solidified to sheet metal (4) position; The foundry goods that solidified part (7) and sheet metal (4) and formwork (1) form and can stop that tin liquor (6) is penetrated into sheet metal (4) and makes tin liquor (6) and sheet metal (4) with the infiltration of top cast(ing) surface or contact and cause the enclosed construction that glues the tin phenomenon with top along the formwork (1) and the gap of solidified superalloy formation; This structure below is aqueous cold plate (3); Aqueous cold plate (3) top is formwork (1), and formwork (1) inside is alloy liquid (2).
2. the antiseized tin method of a kind of liquid metal cooling directional solidification blade surface according to claim 1, it is characterized in that: the material of sheet metal (4) is and on all four alloy of blade material or stainless steel material; Processing need be polished in the surface of sheet metal (4), and the surface does not have oxide layer and other impurity to exist; Sheet metal (4) carries out clean being installed to the preceding need of graining section wax-pattern (5).
3. the antiseized tin method of a kind of liquid metal cooling directional solidification blade surface according to claim 1; It is characterized in that: the thickness of sheet metal (4) is between the 2-5 millimeter; The degree of depth that sheet metal (4) inserts formwork (1) is the 3-8 millimeter, and the length of exposing formwork is the 2-5 millimeter.
4. the antiseized tin method of a kind of liquid metal cooling directional solidification blade surface according to claim 3; It is characterized in that: the length of graining section wax-pattern (5) is the 10-30 millimeter, and the setting height(from bottom) of sheet metal (4) is lower than the maximum length of graining section wax-pattern (5).
5. the antiseized tin method of a kind of liquid metal cooling directional solidification blade surface according to claim 1; It is characterized in that: carry out guaranteeing in the process of alloy cast that sheet metal can not be by whole fusings, to guarantee alloy liquid Quench rapid solidification and form enclosed construction on sheet metal with the formwork (1) and the foundry goods part (7) of having solidified.
6. the antiseized tin method of a kind of liquid metal cooling directional solidification blade surface according to claim 1; It is characterized in that: during wax-pattern coating system shell; Formwork (1) investment precoat adopts schmigel and Ludox material preparation, and the shell mould material adopts zirconium English powder, schmigel or the preparation of electrofused mullite powder.
7. the antiseized tin method of a kind of liquid metal cooling directional solidification blade surface according to claim 6, it is characterized in that: Ludox is 8-20nm for the micelle radius, and dioxide-containing silica is 30%-35%.
8. according to claim 6 or the antiseized tin method of 7 described a kind of liquid metal cooling directional solidification blade surfaces, it is characterized in that: the powder liquid mass ratio of formwork (1) investment precoat is 3.2-3.5:1.
9. the antiseized tin method of a kind of liquid metal cooling directional solidification blade surface according to claim 1, it is characterized in that: the material of aqueous cold plate (3) is a stainless steel.
10. the antiseized tin method of a kind of liquid metal cooling directional solidification blade surface according to claim 1, it is characterized in that: the material of directional solidification blade is orientation or monocrystal nickel-base high-temperature alloy.
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