CN104959535A - Precision casting forming method of tubular stelite component - Google Patents
Precision casting forming method of tubular stelite component Download PDFInfo
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- CN104959535A CN104959535A CN201510392721.6A CN201510392721A CN104959535A CN 104959535 A CN104959535 A CN 104959535A CN 201510392721 A CN201510392721 A CN 201510392721A CN 104959535 A CN104959535 A CN 104959535A
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Abstract
The invention discloses a precision casting forming method of a tubular stelite component. The precision casting forming method comprises the following steps: (1) manufacturing a ceramic mold shell matched with the tubular stelite component in an investment manner according to the design shape of the tubular stelite component; (2) preheating the ceramic mold shell under the condition that the temperature is 900 to 1200 DEG C, maintaining the temperature for 1 to 5 hours, and guaranteeing the uniformity of the temperature of different parts of the ceramic mold shell; melting a stelite alloy ingot under the condition that the temperature is 1400 to 1500 DEG C, then pouring the molten stelite alloy into the preheated ceramic mold shell, and solidifying to form a casting; (3) clearing the mold shell; preserving the heat of the tubular casting for 1 to 4 hours at the temperature of 1000 to 1200 DEG C, then carrying out the quenching treatment, then preserving the heat of the tubular casting for 3 to 6 hours at the temperature of 870 to 980 DEG C, and then air cooling the tubular casting. By adopting the method, the standardized and mass production and forming of the tubular stelite component can be realized, the economic benefit and social benefit are remarkable, and reliability and practicability are realized.
Description
Technical field
The present invention relates to precision casting technology, specifically a kind of tubular Si Taili machine parts'precise casting and molding method.
Background technology
Steam turbine valve parts requires that its sealing surface has certain hardness, to ensure wearability, extends part service life.
At present, two kinds of modes are mainly contained for the wearing layer of steam turbine valve parts sealing surface is shaping.One; adopt plasma spray welding technology at valve parts surface overlaying stellite layer; on the sealing surface of steam turbine valve parts, the wearing layer of stellite is formed with this; this technique needs the different diameter of bores according to valve parts; design and produce high performance serial Hole plasma welding rifle, and it requires to operator's technology and surrounding environment harsh, complex procedures; yield rate is very low, cannot realize standardization, scale is shaping.Its two, be adopt casting method for centrifugal to obtain overall Si Taili neck bush, then by after integral lining and overcoat elastic conjunction, end face soldering and sealing, makes it reach sealing, wear-resisting effect; This technology only has only a few producer to possess production capacity, and thus shaping steam turbine valve parts is expensive.
In sum, the steam turbine valve parts tubular Si Taili part of Si Taili wearing layer as tubular Si Taili part, especially thin-walled, does not have a kind of reasonable, effective, economic method to carry out independent standardization to it shaping at present.
Summary of the invention
Goal of the invention of the present invention is: on industrial equipment part, there is demand for Si Taili wearing layer, and the deficiency of existing forming technique, a kind of tubular Si Taili of independent research machine parts'precise casting and molding method,
The technical solution adopted in the present invention is, a kind of tubular Si Taili machine parts'precise casting and molding method, comprises the following steps:
1). according to the design shape of tubular Si Taili part, manufacture ceramic shell mould suitable with it in fusible pattern mode;
2). be preheating be incubated 1 ~ 5 hour under the condition of 900 ~ 1200 DEG C in temperature by ceramic shell mould, ensure the homogeneous temperature at each position of ceramic shell mould; After stellite ingot casting is melted under the condition of 1400 ~ 1500 DEG C, pour into a mould in preheated ceramic shell mould, be frozen into foundry goods;
3). cleaning formwork; After barrel structure castings is incubated 1 ~ 4 hour under the condition of 1000 ~ 1200 DEG C, Quenching Treatment, air cooling after then barrel structure castings being incubated 3 ~ 6 hours under the condition of 870 ~ 980 DEG C.
Further, described ceramic shell mould takes shape in the running gate system of pottery; Described running gate system comprises cup and running channel, described cup communicates with running channel, described running channel is provided with at least one ceramic shell mould, described ceramic shell mould, primarily of the internal layer formwork of annular configuration and outer formwork composition, forms the annular space die cavity of coupling tube shape component design shape between inside and outside layer formwork.
Further, described running channel is formed primarily of cross gate integrally and ingate, and the end face of described cross gate is used for arranging cup, and the internal diameter of described ingate is unanimously to the internal diameter of annular space die cavity, and the external diameter of ingate is greater than the external diameter of annular space die cavity.
Described internal layer formwork is tubular structure, and internal layer formwork and outer formwork are arranged shaping with concentric circular fashion.
Preferably, in from bottom to top mode sequentially on the outer wall of described ceramic shell mould, the heat-insulation layer that heat insulating ability increases progressively is provided with.Described stellite liquation is remelting liquation.Further, described stellite liquation is the too vertical 6# alloy molten solution of department.
The cooling medium of described Quenching Treatment is water.
The forming method of the running gate system of above-mentioned pottery, comprises the following steps:
1.. according to design shape and the quantity that will pour into a mould of tubular Si Taili part, prepare die cavity wax-pattern that is corresponding, tubular structure, and prepare cup wax-pattern and running channel wax-pattern;
2.. prepared cup wax-pattern and die cavity wax-pattern are combined on running channel wax-pattern by upper and lower order correspondence, form wax tree with this;
3.. the mode of drenching sand with mucilage on step wax tree 2. makes ceramic case, through the running gate system of dewaxing and roasting forming ceramic.
Further, described running channel wax-pattern offers the circular hole of Cavity wax-pattern, the diameter matches of this circular hole is in the external diameter of die cavity wax-pattern.
Preferably, in from bottom to top mode sequentially on the ceramic shell mould outer wall that step is 3. shaping, the heat-insulation layer that heat insulating ability increases progressively is provided with.
The invention has the beneficial effects as follows: the standardization that the present invention reliably achieves tubular Si Taili part with Investment casting technology is shaping, and shaping cost is low, forming operation is easy, and yield rate is high; The even tissue of the tubular Si Taili part that the present invention is shaping, substantially without rarefaction defect, effectively can meet the technical requirement of industrial equipment part; The present invention can realize the producing shaped of scale, mass to tubular Si Taili part, have considerable economic benefit and social benefit, reliable and practical.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Fig. 1 is a kind of section of structure of running gate system formwork of the present invention.
Fig. 2 is the wax tree structural representation of running gate system shown in shaping Fig. 1.
Fig. 3 is the top view of Fig. 2.
Code name implication in figure: 1-cup; 2-cross gate; 3-ingate; 4-annular space die cavity; 5-internal layer formwork; 6-outer formwork; 7-cup wax-pattern; 8-running channel wax-pattern; 9-die cavity wax-pattern.
Detailed description of the invention
embodiment 1
The present invention is the precision casting molding method of tubular Si Taili part, and it comprises the following steps:
1). according to the design shape of tubular Si Taili part, manufacture ceramic shell mould suitable with it in fusible pattern mode.
Concrete (shown in Figure 1), ceramic shell mould of the present invention takes shape in the running gate system of pottery, and this running gate system comprises a cup 1, running channel and two ceramic ring casement chamber formworks.
Wherein, cup 1 takes shape in the top of running channel, is preferably in the end face central authorities of running channel.Cup 1 leads to the interior Kongxiang of running channel.Running channel is formed primarily of cross gate 2 integrally and ingate 3; Ingate 3 is two, and they are with the circular two ends place taking shape in cross gate 2.What the profile size of whole running channel should guarantee two ceramic shell moulds is arranged in juxtaposition space.
Each ceramic shell mould forms primarily of the internal layer formwork 5 of annular configuration and outer formwork 6, internal layer formwork 5 is tubular structure, internal layer formwork 5 and outer formwork 6 are arranged shaping with concentric circular fashion, form the annular space die cavity 4 of coupling tube shape component design shape between inside and outside layer formwork.Two ceramic shell mould corresponding ingate 3 places being molded over running channel two ends respectively.The top of the internal layer formwork 5 of ceramic shell mould extends to the end face at ingate 3 place, and the top of outer formwork 6 only extends to the bottom surface at ingate 3 place, and ingate 3 should communicate with the annular space die cavity 4 of corresponding ceramic shell mould.Based on above-mentioned and aforementioned injection system structure, the internal diameter of each ingate 3 should be unanimously to the internal diameter of corresponding annular space die cavity 4, the external diameter of ingate 3 should be greater than the external diameter of annular space die cavity 4, ensure that the axiality of institute's mould casting so well, prevents the distortion of foundry goods to greatest extent.
See Fig. 2 and Fig. 3, the forming method of above-mentioned ceramic running gate system, comprises the following steps:
1.. according to the design shape (comprising structure and overall size etc.) of tubular Si Taili part and to pour into a mould product quantity (namely this batch want shaping tubular Si Taili number of parts, the present embodiment is two), prepare die cavity wax-pattern 9 that is corresponding, tubular structure, this die cavity wax-pattern 9 is the tubular structure wax-pattern of coupling tubular Si Taili Element Design shape, and namely die cavity wax-pattern 9 is formed by the design shape compacting of wax injector according to tubular Si Taili part; And by wax injector compacting cup wax-pattern 7 and running channel wax-pattern 8, this running channel wax-pattern 8 is the rectangular wax-patterns of two ends respectively in arc-shaped, and offer the circular hole concentric with end arc-shaped respectively at the two ends place of running channel wax-pattern 8, aforementioned circular hole is for connecting die cavity wax-pattern 9; The press temperature of aforementioned wax injector is generally 60 ~ 70 DEG C, pressing pressure is generally 0.8 ~ 1.5MPa;
2.. prepared cup wax-pattern 7 soldering group is combined in the end face central authorities of running channel wax-pattern 8, by the corresponding circular hole place being welded on the two ends of running channel wax-pattern 8 respectively, the top of two die cavity wax-patterns 9, makes the circular hole arranged concentric that die cavity wax-pattern 9 is corresponding with on running channel wax-pattern 8; Wax tree is formed with this;
3.. the mode of drenching sand with mucilage on step wax tree 2. makes ceramic case, concrete, the end face (namely the highest end face of whole wax tree) of removing cup wax-pattern 7 drenches outside sand process without the need to carrying out mucilage, the all surface of whole wax tree all carries out mucilage and drenches sand process, after the mucilage pouring sand on wax tree is shaping, by aforementioned wax tree through dewaxing and calcination process, the ceramic running gate system of cavity must be had.
2). said structure and the shaping running gate system of method are placed in resistance furnace, is preheating be incubated 5 hours under the condition of 900 DEG C in temperature, ensures the homogeneous temperature at each position of running gate system with this.
In the process of running gate system preheating, be carry out remelting fusing, until it fully melts under the condition of 1500 DEG C in temperature by the ingot casting of the too vertical 6# alloy of department.
After running gate system is preheated, taken out resistance furnace; Pour into a mould in running gate system by the remelting liquation of stellite again, concrete, stellite liquation enters running channel from the cup 1 of running gate system, then is disperseed to enter in the annular space die cavity 4 of ceramic shell mould by running channel, and alloy molten solution from top to bottom fills annular space die cavity 4; Alloy molten solution in running gate system is frozen into foundry goods.
3). after the casting solidification in running gate system, the formwork of running gate system is carried out cleaning and remove, and the barrel structure castings in institute's mould casting is scaled off from arrangement foundry goods tree, form tubular Si Taili foundry goods monomer.
Then shaping each tubular Si Taili foundry goods monomer is heat-treated.Concrete, placing in heat-treatment furnace by tubular Si Taili foundry goods, is under the condition of 1000 DEG C in temperature, be incubated after 3 hours, Quenching Treatment, cooling medium is water, then air cooling after tubular Si Taili foundry goods being incubated 6 hours under the condition of 870 DEG C, obtains the Si Taili part of tubular.
embodiment 2
The present invention is the precision casting molding method of tubular Si Taili part, and it comprises the following steps:
1). according to the design shape of tubular Si Taili part, manufacture ceramic shell mould suitable with it in fusible pattern mode.
Concrete, ceramic shell mould of the present invention takes shape in the running gate system of pottery, and this running gate system comprises a cup, a running channel and three ceramic ring casement chamber formworks.
Wherein, cup takes shape in the top of running channel, is preferably in the end face central authorities of running channel.The interior Kongxiang of cup and running channel leads to.Running channel is people's shape structure, and this running channel is formed primarily of cross gate integrally and ingate; Ingate is three, and they are with the circular three end places taking shape in herringbone cross gate.The profile size of whole running channel should guarantee the triangle arrangement space of three ceramic shell moulds.
Each ceramic shell mould is primarily of the internal layer formwork of annular configuration and outer formwork composition, internal layer formwork is tubular structure, internal layer formwork and outer formwork are arranged shaping with concentric circular fashion, form the annular space die cavity of coupling tube shape component design shape between inside and outside layer formwork.Three ceramic shell mould corresponding ingate places being molded over running channel three end respectively.The top of the internal layer formwork of ceramic shell mould extends to the end face at ingate place, and the top of outer formwork only extends to the bottom surface at ingate place, and ingate should communicate with the annular space die cavity of corresponding ceramic shell mould.Based on above-mentioned and aforementioned injection system structure, the internal diameter of each ingate should be unanimously to the internal diameter of corresponding annular space die cavity, the external diameter of ingate should be greater than the external diameter of annular space die cavity, ensure that the axiality of institute's mould casting so well, prevents the distortion of foundry goods to greatest extent.
The forming method of the running gate system of above-mentioned pottery, comprises the following steps:
1.. according to the design shape (comprising structure and overall size etc.) of tubular Si Taili part and to pour into a mould product quantity (namely this batch want shaping tubular Si Taili number of parts, the present embodiment is three), prepare die cavity wax-pattern that is corresponding, tubular structure, this die cavity wax-pattern is the tubular structure wax-pattern of coupling tubular Si Taili Element Design shape, and namely die cavity wax-pattern is formed by the design shape compacting of wax injector according to tubular Si Taili part; And by wax injector compacting cup wax-pattern and running channel wax-pattern, this running channel wax-pattern is the herringbone wax-patterns of three ends respectively in arc-shaped, and offer the circular hole concentric with end arc-shaped respectively at three end places of running channel wax-pattern, aforementioned circular hole is for connecting die cavity wax-pattern; The press temperature of aforementioned wax injector is generally 60 ~ 70 DEG C, pressing pressure is generally 0.8 ~ 1.5MPa;
2.. prepared cup wax-pattern soldering group is combined in the end face central authorities of running channel wax-pattern, by the corresponding circular hole place being welded on three ends of running channel wax-pattern respectively, the top of three die cavity wax-patterns, makes the circular hole arranged concentric that die cavity wax-pattern is corresponding with on running channel wax-pattern; Wax tree is formed with this;
3.. the mode of drenching sand with mucilage on step wax tree 2. makes ceramic case, concrete, the end face (namely the highest end face of whole wax tree) of removing cup wax-pattern drenches outside sand process without the need to carrying out mucilage, the all surface of whole wax tree all carries out mucilage and drenches sand process, after the mucilage pouring sand on wax tree is shaping, by aforementioned wax tree through dewaxing and calcination process, the ceramic running gate system of cavity must be had.
2). said structure and the shaping running gate system of method are placed in resistance furnace, is preheating be incubated 4 hours under the condition of 1100 DEG C in temperature, ensures the homogeneous temperature at each position of running gate system with this.
In the process of running gate system preheating, be carry out remelting, until it fully melts under the condition of 1450 DEG C in temperature by the ingot casting of the too vertical 6# alloy of department.
After running gate system is preheated, taken out resistance furnace; Pour into a mould in running gate system by the remelting liquation of stellite again, concrete, stellite liquation enters running channel from the cup of running gate system, then is disperseed to enter in the annular space die cavity of ceramic shell mould by running channel, and alloy molten solution from top to bottom fills annular space die cavity; Alloy molten solution in running gate system is frozen into foundry goods.
3). after the casting solidification in running gate system, the formwork of running gate system is carried out cleaning and remove, and the barrel structure castings in institute's mould casting is got off from arrangement foundry goods tree, form tubular Si Taili foundry goods monomer.
Then shaping each tubular Si Taili foundry goods monomer is heat-treated.Concrete, placing in heat-treatment furnace by tubular Si Taili foundry goods, is under the condition of 1100 DEG C in temperature, be incubated after 2 hours, Quenching Treatment, cooling medium is water, then air cooling after tubular Si Taili foundry goods being incubated 4 hours under the condition of 920 DEG C, obtains the Si Taili part of tubular.
embodiment 3
The present invention is the precision casting molding method of tubular Si Taili part, and it comprises the following steps:
1). according to the design shape of tubular Si Taili part, manufacture ceramic shell mould suitable with it in fusible pattern mode.
Concrete, ceramic shell mould of the present invention takes shape in the running gate system of pottery, and this running gate system comprises a cup, a running channel and four ceramic ring casement chamber formworks.
Wherein, cup takes shape in the top of running channel, is preferably in the end face central authorities of running channel.The interior Kongxiang of cup and running channel leads to.Running channel is crosswise structure, and this running channel is formed primarily of cross gate integrally and ingate; Ingate is four, and they are with the circular four end places taking shape in cross gate.The profile size of whole running channel should guarantee the corner arrangement space of four ceramic shell moulds.
Each ceramic shell mould is primarily of the internal layer formwork of annular configuration and outer formwork composition, internal layer formwork is tubular structure, internal layer formwork and outer formwork are arranged shaping with concentric circular fashion, form the annular space die cavity of coupling tube shape component design shape between inside and outside layer formwork.Four ceramic shell mould corresponding ingate places being molded over running channel four end respectively.The top of the internal layer formwork of ceramic shell mould extends to the end face at ingate place, and the top of outer formwork only extends to the bottom surface at ingate place, and ingate should communicate with the annular space die cavity of corresponding ceramic shell mould.Based on above-mentioned and aforementioned injection system structure, the internal diameter of each ingate should be unanimously to the internal diameter of corresponding annular space die cavity, the external diameter of ingate should be greater than the external diameter of annular space die cavity, ensure that the axiality of institute's mould casting so well, and prevents the distortion of foundry goods to greatest extent.
The forming method of the running gate system of above-mentioned pottery, comprises the following steps:
1.. according to the design shape (comprising structure and overall size etc.) of tubular Si Taili part and to pour into a mould product quantity (namely this batch want shaping tubular Si Taili number of parts, the present embodiment is four), prepare die cavity wax-pattern that is corresponding, tubular structure, this die cavity wax-pattern is the tubular structure wax-pattern of coupling tubular Si Taili Element Design shape, and namely die cavity wax-pattern is formed by the design shape compacting of wax injector according to tubular Si Taili part; And by wax injector compacting cup wax-pattern and running channel wax-pattern, this running channel wax-pattern is the cross wax-patterns of four ends respectively in arc-shaped, and offer the circular hole concentric with end arc-shaped respectively at four end places of running channel wax-pattern, aforementioned circular hole is for connecting die cavity wax-pattern; The press temperature of aforementioned wax injector is generally 60 ~ 70 DEG C, pressing pressure is generally 0.8 ~ 1.5MPa;
2.. prepared cup wax-pattern soldering group is combined in the end face central authorities of running channel wax-pattern, by the corresponding circular hole place being welded on four ends of running channel wax-pattern respectively, the top of four die cavity wax-patterns, makes the circular hole arranged concentric that die cavity wax-pattern is corresponding with on running channel wax-pattern; Wax tree is formed with this;
3.. the mode of drenching sand with mucilage on step wax tree 2. makes ceramic case, concrete, the end face (namely the highest end face of whole wax tree) of removing cup wax-pattern drenches outside sand process without the need to carrying out mucilage, the all surface of whole wax tree all carries out mucilage and drenches sand process, after the mucilage pouring sand on wax tree is shaping, then by aforementioned wax tree through dewaxing and calcination process, the ceramic running gate system of cavity must be had.
2). said structure and the shaping running gate system of method are placed in resistance furnace, is preheating be incubated 2.5 hours under the condition of 1200 DEG C in temperature, ensures the homogeneous temperature at each position of running gate system with this.
In the process of running gate system preheating, be carry out remelting, until it fully melts under the condition of 1500 DEG C in temperature by the ingot casting of the too vertical 6# alloy of department.
After running gate system is preheated, taken out resistance furnace; Pour into a mould in running gate system by the remelting liquation of stellite again, concrete, stellite liquation enters running channel from the cup of running gate system, then is disperseed to enter in the annular space die cavity of ceramic shell mould by running channel, and alloy molten solution from top to bottom fills annular space die cavity; Alloy molten solution in running gate system is frozen into foundry goods.
3). after the casting solidification in running gate system, the formwork of running gate system is carried out cleaning and remove, and the barrel structure castings in institute's mould casting is got off from arrangement foundry goods tree, form tubular Si Taili foundry goods monomer.
Then shaping each tubular Si Taili foundry goods monomer is heat-treated.Concrete, placing in heat-treatment furnace by tubular Si Taili foundry goods, is under the condition of 1200 DEG C in temperature, be incubated after 1 hour, Quenching Treatment, cooling medium is water, then air cooling after tubular Si Taili foundry goods being incubated 5 hours under the condition of 980 DEG C, obtains the Si Taili part of tubular.
Need described herein, in above-mentioned three embodiments, if when the axial height of ceramic ring casement chamber formwork is greater than 15cm, need to carry out isothermal holding to ceramic shell mould.Concrete, according to the length (being greater than 15cm) of institute's forming ceramic annular space die cavity formwork, the outer wall of ceramic shell mould arranges the heat-insulation layer that heat-insulating property changes in gradient, this heat-insulating property should be arranged in from bottom to top mode sequentially on ceramic shell mould, namely the weaker heat-insulation layer of heat insulating ability is set in the outer wall bottom of ceramic shell mould, the heat-insulation layer that heat insulating ability is higher is set in the middle part of the outer wall of ceramic shell mould, on the outer wall top of ceramic shell mould, the higher heat-insulation layer of heat insulating ability is set, heat-insulating property between each heat-insulation layer is arranged with the graded of gradual change as much as possible.This heat-insulating property set on ceramic shell mould outer wall, in from bottom to top heat-insulation layer sequentially, is conducive to realizing good solidification sequence in ceramic shell mould, eliminates the rarefaction defect of cast-internal.
If when the axial height of ceramic shell mould is within the scope of 15cm, without the need to arranging the heat-insulation layer of graded on ceramic shell mould outer wall.
Each embodiment is only in order to illustrate the present invention above, is not intended to limit.Although with reference to the various embodiments described above to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the concrete technical scheme in the various embodiments described above, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of technical solution of the present invention.
Claims (8)
1. a tubular Si Taili machine parts'precise casting and molding method, comprises the following steps:
1). according to the design shape of tubular Si Taili part, manufacture ceramic shell mould suitable with it in fusible pattern mode;
2). be preheating be incubated 1 ~ 5 hour under the condition of 900 ~ 1200 DEG C in temperature by ceramic shell mould, ensure the homogeneous temperature at each position of ceramic shell mould; After stellite ingot casting is melted under the condition of 1400 ~ 1500 DEG C, pour into a mould in preheated ceramic shell mould, be frozen into foundry goods;
3). cleaning formwork; After barrel structure castings is incubated 1 ~ 4 hour under the condition of 1000 ~ 1200 DEG C, Quenching Treatment, air cooling after then barrel structure castings being incubated 3 ~ 6 hours under the condition of 870 ~ 980 DEG C.
2. tubular Si Taili machine parts'precise casting and molding method according to claim 1, is characterized in that: described ceramic shell mould takes shape in the running gate system of pottery; Described running gate system comprises cup (1) and running channel, described cup (1) communicates with running channel, described running channel is provided with at least one ceramic shell mould, described ceramic shell mould, primarily of the internal layer formwork (5) of annular configuration and outer formwork (6) composition, forms the annular space die cavity (4) of coupling tube shape component design shape between inside and outside layer formwork.
3. tubular Si Taili machine parts'precise casting and molding method according to claim 2, it is characterized in that: described running channel is formed primarily of cross gate (2) integrally and ingate (3), the end face of described cross gate (2) is used for arranging cup (1), the internal diameter of described ingate (3) is unanimously to the internal diameter of annular space die cavity (4), and the external diameter of ingate (3) is greater than the external diameter of annular space die cavity (4).
4. tubular Si Taili machine parts'precise casting and molding method according to claim 2, is characterized in that: described internal layer formwork (5) is tubular structure, and internal layer formwork (5) and outer formwork (6) are arranged shaping with concentric circular fashion.
5. tubular Si Taili machine parts'precise casting and molding method according to claim 1 or 2, is characterized in that: in from bottom to top mode sequentially on the outer wall of described ceramic shell mould, be provided with the heat-insulation layer that heat insulating ability increases progressively.
6. tubular Si Taili machine parts'precise casting and molding method according to claim 1, is characterized in that: described stellite liquation is remelting liquation.
7. tubular Si Taili machine parts'precise casting and molding method according to claim 1 or 6, is characterized in that: described stellite liquation is the too vertical 6# alloy molten solution of department.
8. tubular Si Taili machine parts'precise casting and molding method according to claim 1, is characterized in that: the cooling medium of described Quenching Treatment is water.
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| CN112453325A (en) * | 2020-11-03 | 2021-03-09 | 哈尔滨工业大学 | Casting forming method of wing rudder with high-temperature alloy dot matrix sandwich structure |
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