CN110202089A - The complex modeling method and its application of casting - Google Patents
The complex modeling method and its application of casting Download PDFInfo
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- CN110202089A CN110202089A CN201910625267.2A CN201910625267A CN110202089A CN 110202089 A CN110202089 A CN 110202089A CN 201910625267 A CN201910625267 A CN 201910625267A CN 110202089 A CN110202089 A CN 110202089A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/28—Moulds for peculiarly-shaped castings for wheels, rolls, or rollers
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- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
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Abstract
The present invention relates to the complex modeling method and its application of casting.The method carries out moulding using main body of the rapid cooling molding sand to the casting, carries out moulding using riser of the slow cooling molding sand to the casting.This method carries out complex modeling using different parts of the different cooling molding sand to casting, realize control while accelerating thick and large casting main body solidification cooling rate and slow down casting pressing port solidification cooling rate, solve the problems, such as that single sand molding not can be implemented simultaneously refinement casting body core tissue and improve metallurgical quality, the load for helping to improve casting is horizontal.The invention further relates to the casting methods for the casting for applying above-mentioned complex modeling method.
Description
Technical field
The present invention relates to metal material casting fields, in particular to the complex modeling method and its application of casting.
Background technique
Precision casting, the precision casting especially cast with novel light high-temperature structural material titanium-aluminium alloy, such as titanium aluminium
Alloy booster turbine is all made of precision casting process both at home and abroad at present to prepare, wherein the titanium aluminium whirlpool of diameter 100mm or more
Wheel mainly uses vertical centrifugal casting technique.
Novel light high-temperature structural material titanium-aluminium alloy is used instead of heavier nickel base superalloy applied to vehicle motor
The rotary inertia of turbine shaft can be greatly reduced in booster turbine, significantly improve the acceleration responsiveness of engine and vehicle, simultaneously
Also there is significant effects of energy saving and emission reduction.The engineering application of lightweight titanium aluminium booster turbine is to realize that booster is light-weighted
Inevitable development trend.
By taking the casting process of titanium-aluminium alloy booster turbine as an example, although passing through the optimization skills such as casting technique and feeding structure
Art measure solve the problems, such as thin wall vane essence casting forming, turbine thickness big hub macroscopic view metallurgical quality, but microdefect statistics and
Microstructure observation's discovery, there is also the dispersed loose and organizational coarsenesies that a small amount of size is more than 200 μm for thick big hub core
Problem.In view of wheel hub core is stress maximum position when booster turbine is on active service, room temperature tensile this for titanium-aluminium alloy
The lower material of plasticity, rarefaction defect and organizational coarseness will carry out significant unfavorable shadow to titanium aluminium booster turbine load horizontal stripes
It rings.Existing formative method often fails to be directed to turbine hub and feeding head to the different demands of solidification cooling rate, using nothing
The molding sand of difference carries out moulding to casting all sites.
In view of this, the present invention is specifically proposed.
Summary of the invention
The first object of the present invention is to provide a kind of complex modeling method of casting, and this method uses different cooling types
Sand carries out complex modeling to the different parts of casting, realizes and accelerates thick and large casting main body solidification cooling rate and slow down casting to emit
Controlled while mouthful solidification cooling rate, solve single sand molding not can be implemented simultaneously refinement casting body core tissue and
The problem for improving metallurgical quality, the load for helping to improve casting are horizontal.
The second object of the present invention is to provide a kind of casting method of casting, the modeling process use of this method medium casting
Above-mentioned complex modeling method.
For the aforementioned problem for solving the prior art, the solidification cooling rate at thick big hub position should be accelerated in principle with thin
Change tissue, slow down the solidification cooling rate at feeding head position simultaneously to guarantee the abundant feeding of wheel hub.
In order to realize above-mentioned purpose of the invention, the following technical scheme is adopted:
The complex modeling method of casting uses rapid cooling molding sand to carry out moulding to the main body of the casting, using slow cooling type
Sand carries out moulding to the riser of the casting；
The thermal coefficient difference of the rapid cooling molding sand and the slow cooling molding sand is in 40~440Wm-1·K-1More than, accumulation of heat
Coefficient differentials are in 40~340Wm-2·K-1More than.
Optionally, the thermal coefficient of the rapid cooling molding sand is 50~450Wm-1·K-1, heat storage coefficient be 50~350W
m-2·K-1。
Optionally, the thermal coefficient lower limit value of the rapid cooling molding sand can independently selected from 50,60,70,80,90,100,
120、150、180、200、250、300、325、350、400、407、410、420、430、440、450W·m-1·K-1Point value.
Optionally, the thermal coefficient upper limit value of the rapid cooling molding sand can independently selected from 50,80,100,120,150,
180、200、250、300、320、350、380、400、410、420、430、440、450W·m-1·K-1Point value.
Optionally, the heat storage coefficient lower limit value of the rapid cooling molding sand can independently selected from 50,60,70,80,90,100,
120、150、180、200、250、300、310、320、330、340、350W·m-2·K-1Point value.
Optionally, the heat storage coefficient upper limit value of the rapid cooling molding sand can independently selected from 50,80,100,120,150,
180、200、250、280、300、310、320、330、340、350W·m-2·K-1Point value.
In the present invention, high accumulation of heat, high thermal conductivity coefficient rapid cooling molding sand use, solidification cooling rate can be accelerated, realize
The structure refinement of casting body structure.
Optionally, the rapid cooling molding sand is selected from least one of red copper molding sand, aluminium profiles sand, swage sand, graphite molding sand.
Optionally, 0.3~10.0Wm of thermal coefficient of the slow cooling molding sand-1·K-1, 0.5~10.0W of heat storage coefficient
m-2·K-1。
Optionally, the thermal coefficient lower limit value of the slow cooling molding sand can independently selected from 0.3,0.4,0.5,0.6,0.7,
0.8、0.9、1.0、2.0、3.0、4.0、5.0、6.0、7.0、8.0、9.0、10.0W·m-1·K-1。
Optionally, the thermal coefficient upper limit value of the slow cooling molding sand can independently selected from 0.3,0.5,0.8,1.0,2.0,
3.0、4.0、5.0、6.0、7.0、8.0、9.0、10.0W·m-1·K-1。
Optionally, the heat storage coefficient lower limit value of the slow cooling molding sand can independently selected from 0.5,0.6,0.7,0.8,0.9,
1.0、2.0、3.0、4.0、5.0、6.0、7.0、8.0、9.0、10.0W·m-2·K-1。
Optionally, the heat storage coefficient upper limit value of the slow cooling molding sand can independently selected from 0.5,1.0,2.0,3.0,4.0,
5.0、6.0、7.0、8.0、9.0、10.0W·m-2·K-1。
In the present invention, low accumulation of heat, low thermal conductivity slow cooling molding sand use, the cooling speed of solidification of riser can be slowed down
Rate guarantees abundant feeding of the riser to casting body, to improve metallurgical quality.
Optionally, the slow cooling molding sand is selected from magnesia molding sand, mullite molding sand.
It is typical case with titanium aluminium booster turbine casting, rapid cooling molding sand and slow cooling molding sand are to casting privileged site in the present invention
Complex modeling, solve single sand molding not can be implemented simultaneously refinement wheel hub core tissue and improve metallurgical quality difficulty
Topic is conducive to improve most weak and the maximum wheel hub core of stress the load ability of titanium aluminium booster turbine quality.
Optionally, the partial size of the rapid cooling molding sand is 1.0~5.0mm.
Optionally, the particle diameter distribution of the rapid cooling molding sand is D70≤3mm。
Optionally, the partial size of the slow cooling molding sand is 2.0~10.0mm.
Optionally, the particle diameter distribution of the slow cooling molding sand is 5≤D80≤10mm。
In the present invention, the partial size of suitable rapid cooling molding sand and particle diameter distribution is selected to be conducive to more efficiently accelerate casting body
Solidification cooling rate, and then thinning microstructure；The partial size and particle diameter distribution for selecting suitable slow cooling molding sand, facilitate more efficiently
The cooling rate of corresponding component is reduced, and then improves metallurgical quality.
Optionally, the complex modeling method of casting includes:
By the main body of casting under, riser is inverted in sandbox upper；
Rapid cooling molding sand is seated in around sandbox medium casting main body, the filling of rapid cooling molding sand height be no more than casting body with
The junction surface of riser；
Partition is placed on the junction surface of casting body and riser, rapid cooling molding sand and slow cooling molding sand is isolated；
Slow cooling molding sand is seated in sandbox around riser, the filling height of slow cooling molding sand is no more than riser top, riser
Top is fixed using pressing plate；Complex modeling is carried out to casting.
Optionally, partition is placed on the junction surface of casting body and riser, rapid cooling molding sand and slow cooling molding sand is isolated.
Optionally, the top of the riser is fixed using pressing plate.
Optionally, the partition and the pressing plate with a thickness of 0.5~2mm.
Optionally, the material of the partition and the pressing plate can be selected from metal plate, ceramic wafer.
Optionally, the partition and the pressing plate are selected from the not high ceramic wafer of heating conduction.
As an implementation, the complex modeling method of casting includes:
Casting is inverted in sandbox, casting body is under, and riser is upper, and casting body is connected with riser；
Moulding is carried out to casting body part using the granular rapid cooling molding sand of 1.0~5.0mm, molding sand height is no more than casting
The junction surface of part main body and riser, wherein 50~450Wm of rapid cooling molding sand thermal coefficient-1·K-1, heat storage coefficient 50~
350W·m-2·K-1；
The ceramic wafer of 0.5~2mm of thickness is placed in the junction of casting body and riser, rapid cooling molding sand and slow is isolated
Cold mould sand；
Moulding is carried out to riser part more than partition using the granular slow cooling molding sand of 2.0~10.0mm, height does not surpass
Riser top is crossed, and is fixed using the ceramic platen of 0.5~2mm, wherein 0.3~10.0W of slow cooling molding sand thermal coefficient
m-1·K-1, 0.5~10.0Wm of heat storage coefficient-2·K-1。
Another object according to the present invention additionally provides the casting method of casting, the casting and forming step including casting and
Step of overall modelling；Wherein, step of overall modelling is carried out using any of the above-described casting complex modeling method.
Optionally, the casting and molding method of the casting includes but is not limited to vertical centrifugal casting, gravitational casting, anti-gravity
Casting, compression casting.
Optionally, the casting and molding method of the casting is vertical centrifugal casting and/or gravitational casting.
Optionally, the casting includes but is not limited to turbine, impeller.
Optionally, the hub diameter of the turbine or impeller is 100mm or more.
Optionally, the turbine is booster turbine.
Optionally, the impeller is pressure booster blower impeller.
Optionally, the turbine is titanium aluminium booster turbine.
Optionally, impeller is titanium alloy pressure booster blower impeller.
As an implementation, the casting method of titanium aluminium booster turbine includes:
(1) it according to turbine structure size characteristics, determines and can guarantee the forming of turbo blade essence casting and wheel hub macroscopic view metallurgical quality
Main casting process parameters range and feeding head structure；
(2) Turbine Casting is inverted in sandbox, turbine is under, and feeding head is upper, and wheel hub surface and feeding head phase
Even；
(3) using the granular rapid cooling molding sand of 1.0~5.0mm to moulding is partially carried out below turbine wheel hub face, molding sand is high
Degree is no more than turbine wheel hub face, wherein 50~450Wm of rapid cooling molding sand thermal coefficient-1·K-1, 50~350Wm of heat storage coefficient-2·K-1；
(4) ceramic separator of 0.5~2mm of thickness is placed on turbine wheel hub face, rapid cooling molding sand and slow cooling type is isolated
Sand；
(5) moulding, height are carried out to feeding head more than wheel hub surface using the granular slow cooling molding sand of 2.0~10.0mm
It is fixed no more than feeding head top, and using the ceramic platen of 0.5~2mm, wherein slow cooling molding sand thermal coefficient 0.3
~10.0Wm-1·K-1, 0.5~10.0Wm of heat storage coefficient-2·K-1；
(6) after Turbine Casting casting, comprehensive blade forming situation, the macro microcosmic metallurgical quality of wheel hub and structure refinement
Situation, the pouring forming technology parameter of appropriate adjustment turbine, with the determining pouring forming technology to match with complex modeling method.
Compared with prior art, the invention has the benefit that
The complex modeling method of casting provided by the invention is carried out using different parts of the different cooling molding sand to casting
Complex modeling realizes the collaboration control accelerated thick and large casting main body solidification cooling rate and slow down casting pressing port solidification cooling rate
System solves the problems, such as that single sand molding not can be implemented simultaneously refinement casting body core tissue and improve metallurgical quality, has
The load for helping improve casting is horizontal.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the complex modeling process schematic of titanium aluminium booster turbine casting in one embodiment of the present invention；In figure
Appended drawing reference is as follows:
1- turbine hub；2- feeding head；3- rapid cooling molding sand；4- partition；5- slow cooling molding sand；6- pressing plate；
Fig. 2 is the Φ 160mm turbine hub core metallurgical imperfection representative pictures that different shaping method is poured, in which:
(a) single magnesia formative method；(b) complex modeling method；
Fig. 3 is the Φ 160mm turbine hub core synusia macrograph that different shaping method is poured, in which:
(a) single magnesia formative method；(b) complex modeling method.
Specific embodiment
Embodiment of the present invention is described in detail below in conjunction with examples and drawings, but those skilled in the art
Member will be understood that the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.It is not infused in embodiment
Bright actual conditions person, carries out according to conventional conditions or manufacturer's recommended conditions.Production firm is not specified in agents useful for same or instrument
Person, being can be with conventional products that are commercially available.
Typically, following embodiment is using the casting of titanium aluminium booster turbine and moulding as example, detailed description of the present invention
Specific embodiment.
The complex modeling of 1 hub outside diameter 100mm titanium aluminium booster turbine of embodiment and casting
Turbine is formed using vertical centrifugal casting method, 1 outer diameter of wheel hub is 100mm, and 2 outer diameter of feeding head is 80mm；
Casting process parameters include:
1600~1650 DEG C of pouring temperature, 400~600 DEG C of casting mold preheating temperature, 600~1000rpm of centrifugal rotational speed.
Complex modeling is carried out to the turbine of moulding by casting:
As shown in fig. 1, the ceramic shell of turbine (1+2) is resulted in sandbox, turbine hub 1 is under, feeding head 2
Upper, and wheel hub surface is connected with feeding head；
Use 1.0~5.0mm graininess and particle diameter distribution for D70=3mm, thermal coefficient 407Wm-1·K-1, accumulation of heat system
Number 325Wm-2·K-1Red copper molding sand 3 is no more than wheel hub surface to moulding, molding sand height is partially carried out below turbine wheel hub face；
The ceramic separator 4 of thickness 1.5mm is placed on turbine wheel hub face, rapid cooling molding sand and slow cooling molding sand is isolated；
Use 2.0~10.0mm graininess and particle diameter distribution for D80=8mm, thermal coefficient 0.7Wm-1·K-1, accumulation of heat system
Number 8.0Wm-2·K-1Magnesium oxide sand 5 to it is more than wheel hub surface feeding head 2 carry out moulding, highly be no more than feeding head
Top, and be fixed using the ceramic platen 6 of 1.5mm；Complex modeling is carried out to turbine.
After turbine casting, comprehensive turbo blade molding situation, the macro microcosmic metallurgical quality of wheel hub and structure refinement feelings
Condition is poured using following technological parameter adjusted: 1600~1650 DEG C of pouring temperature, 600 DEG C of casting mold preheating temperature, from
Heart revolving speed 900rpm.
The complex modeling of 2 hub outside diameter 160mm titanium aluminium booster turbine of embodiment and casting
Turbine is formed using vertical centrifugal casting method, 1 outer diameter of wheel hub is 160mm, and 2 outer diameter of feeding head is 100mm；
Casting process parameters include:
1600~1650 DEG C of pouring temperature, 200~400 DEG C of casting mold preheating temperature, 300~600rpm of centrifugal rotational speed.
Complex modeling is carried out to the turbine of moulding by casting:
As shown in fig. 1, the ceramic shell of turbine (1+2) is resulted in sandbox, turbine hub 1 is under, feeding head 2
Upper, and wheel hub surface is connected with feeding head；
Use 1.0~5.0mm graininess and particle diameter distribution for D70=2mm, thermal coefficient 200Wm-1·K-1, accumulation of heat system
Number 191Wm-2·K-1Aluminium profiles sand 3 is no more than wheel hub surface to moulding, molding sand height is partially carried out below turbine wheel hub face；
The ceramic separator 4 of thickness 1.5mm is placed on turbine wheel hub face, rapid cooling molding sand and slow cooling molding sand is isolated；
Use 2.0~10.0mm graininess and particle diameter distribution for D80=5mm, thermal coefficient 0.7Wm-1·K-1, accumulation of heat system
Number 1.0Wm-2·K-1Magnesium oxide sand 5 to it is more than wheel hub surface feeding head 2 carry out moulding, highly be no more than feeding head
Top, and be fixed using the ceramic platen 6 of 1.5mm；Complex modeling is carried out to turbine.
After turbine casting, comprehensive turbo blade molding situation, the macro microcosmic metallurgical quality of wheel hub and structure refinement feelings
Condition is poured using following technological parameter adjusted: 1600~1650 DEG C of pouring temperature, 400 DEG C of casting mold preheating temperature, from
Heart revolving speed 600rpm.
The single moulding and casting of 1 hub outside diameter 100mm titanium aluminium booster turbine of comparative example
Casting technique is roughly the same with embodiment 1, the difference is that: modeling process uses single magnesia (thermally conductive system
Number 0.7Wm-1·K-1, heat storage coefficient 8.0Wm-2·K-1) indifference moulding is carried out to wheel hub and feeding head.
The single moulding and casting of 2 hub outside diameter 160mm titanium aluminium booster turbine of comparative example
Casting technique is roughly the same with embodiment 2, the difference is that: modeling process uses single magnesia (thermally conductive system
Number 0.7Wm-1·K-1, heat storage coefficient 1.0Wm-2·K-1) indifference moulding is carried out to wheel hub and feeding head.
Experimental example
The turbine hub core metallographic specimen cast in embodiment 1, embodiment 2 and comparative example 1 and 2 is cut, is adopted
After standard metallographic preparation method of sample grinding and polishing, microdefect is observed under 100 times of optical microscopy, is swept using back scattering
It retouches Electronic Speculum and counts synusia spacing according to GB/T5749 Quantitative metallography.Wherein, optical microscopy is using LEICA MEF4A image point
Analyzer, back scattering scanning electron microscope use the JEOL JSM7800 scanning electron microscope of JEOL company.
Embodiment 1,2 and comparative example 1,2 turbine core quality versus's results are as listed in Table 1:
1 turbine core quality versus's result of table
It is can be found that by result in table 1:
Compared with comparative example 1, using after complex modeling method in embodiment 1, the turbine hub core of outer diameter 100mm is microcosmic
Defect full-size is reduced to 55 μm from 212 μm or more, meanwhile, average synusia spacing is reduced to 456nm from 1200nm.
Similarly, compared with comparative example 2, after using complex modeling method in embodiment 2, outer diameter 160mm turbine hub core
Portion's microdefect full-size is reduced to 72 μm from 256 μm, as shown in Figure 2；Meanwhile average synusia spacing reduces from 1578nm
To 662nm, as shown in Figure 3.
Using complex modeling method provided by the invention, the different parts of casting are answered using different cooling molding sand
Moulding is closed, the collaboration control accelerated thick and large casting main body solidification cooling rate and slow down casting pressing port solidification cooling rate is realized
System, high accumulation of heat, high thermal conductivity coefficient rapid cooling molding sand can accelerate solidification cooling rate, realize the structure refinement of casting structure, it is low
Accumulation of heat, low thermal conductivity slow cooling molding sand can slow down the solidification cooling rate of riser, guarantee riser to the abundant of casting body
Feeding, to improve metallurgical quality.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, but those skilled in the art should understand that: its
It is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features
It is equivalently replaced；And these are modified or replaceed, various embodiments of the present invention skill that it does not separate the essence of the corresponding technical solution
The range of art scheme.
Claims (10)
1. the complex modeling method of casting, which is characterized in that carry out moulding using main body of the rapid cooling molding sand to the casting, use
Slow cooling molding sand carries out moulding to the riser of the casting；
The thermal coefficient difference of the rapid cooling molding sand and the slow cooling molding sand is in 40~440Wm-1·K-1More than, heat storage coefficient is poor
Value is in 40~340Wm-2·K-1More than.
2. the method according to claim 1, wherein the thermal coefficient of the rapid cooling molding sand is 50~450Wm-1·K-1, heat storage coefficient be 50~350Wm-2·K-1。
3. the method according to claim 1, wherein the thermal coefficient of the slow cooling molding sand is 0.3~10.0W
m-1·K-1, heat storage coefficient be 0.5~10.0Wm-2·K-1。
4. method according to claim 1 or 2, which is characterized in that the partial size of the rapid cooling molding sand is 1.0~5.0mm.
5. method according to claim 1 or 3, which is characterized in that the partial size of the slow cooling molding sand is 2.0~10.0mm.
6. the method according to claim 1, wherein the described method includes:
By the main body of casting under, riser is inverted in sandbox upper；
Rapid cooling molding sand is seated in around sandbox medium casting main body, the filling height of rapid cooling molding sand is no more than casting body and riser
Junction surface；
Slow cooling molding sand is seated in sandbox around riser, the filling of slow cooling molding sand height is no more than riser top, to casting into
Row complex modeling.
7. according to the method described in claim 6, it is characterized in that, the junction surface of casting body and riser place every
Plate, rapid cooling molding sand and slow cooling molding sand is isolated；
The top of the riser is fixed using pressing plate；
Preferably, the partition and the pressing plate with a thickness of 0.5~2mm.
8. the casting method of casting, which is characterized in that casting and forming step and step of overall modelling including casting；
Wherein, step of overall modelling is carried out using the described in any item casting complex modeling methods of claim 1 to 7.
9. according to the method described in claim 8, it is characterized in that, the casting and molding method of the casting includes vertical centrifugal casting
It makes, gravity-assist pouring, compression casting, antigravity casting；
Preferably, the casting and molding method of the casting is vertical centrifugal casting and/or gravitational casting.
10. according to the method described in claim 8, it is characterized in that, the casting includes turbine, impeller；
Preferably, the hub diameter of the turbine or impeller is 100mm or more；
Preferably, the turbine is booster turbine；The impeller is pressure booster blower impeller；
It is further preferred that the turbine is titanium aluminium booster turbine；The impeller is titanium alloy pressure booster blower impeller.
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| CN103658535A (en) * | 2014-01-06 | 2014-03-26 | 山东建筑大学 | Investment casting process of large copper impeller |
| CN106807888A (en) * | 2017-01-04 | 2017-06-09 | 山东汇金股份有限公司 | A kind of resin-coated sand shell mould covers the casting technique of steel sand solidification |
| CN108044036A (en) * | 2017-12-08 | 2018-05-18 | 北京星航机电装备有限公司 | A kind of casting method for inhibiting K4002 high temperature alloy thin-wall part casting cracks |
| CN108672655A (en) * | 2018-04-19 | 2018-10-19 | 北京机科国创轻量化科学研究院有限公司 | A kind of composite casting method that mold temperature is controllable |
| CN108580811A (en) * | 2018-07-09 | 2018-09-28 | 安徽莱恩电泵有限公司 | A kind of cast copper pump vane casting mold |
| CN108705036A (en) * | 2018-08-14 | 2018-10-26 | 江阴鑫宝利金属制品有限公司 | A kind of turbo-charger impeller can monitor-type intelligence fast vacuum casting system |
| CN108971425A (en) * | 2018-08-22 | 2018-12-11 | 四川共享铸造有限公司 | A kind of casting method solving the loose class defect of thick-wall nodular iron |
| CN109622908A (en) * | 2019-01-11 | 2019-04-16 | 钢铁研究总院 | A kind of vertical centrifugal fine casting method of lightweight titanium aluminium turbine |
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