CN206169262U - Casting blank directional solidification and regional refrigerated combination formula junker mold of selecting - Google Patents

Casting blank directional solidification and regional refrigerated combination formula junker mold of selecting Download PDF

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Publication number
CN206169262U
CN206169262U CN201620994092.4U CN201620994092U CN206169262U CN 206169262 U CN206169262 U CN 206169262U CN 201620994092 U CN201620994092 U CN 201620994092U CN 206169262 U CN206169262 U CN 206169262U
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cooling
chassis
water
mould
water channel
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张宗宁
唐明明
张倩倩
王汉东
王肇飞
赵景山
王风德
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Yantai Wanlong Vacuum Metallurgy Co Ltd
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Yantai Wanlong Vacuum Metallurgy Co Ltd
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Abstract

The utility model relates to a casting blank directional solidification and regional refrigerated combination formula junker mold of selecting realizes casting blank forced cooling and directional solidification from bottom to top, and the column crystal of avoiding perpendicular mould wall and non -directional growth excessive flourishing and make its perpendicular chassis grow, has eliminated center porosity, V type segregation problem, obtains that grain refinement, ultrasonic testing crystalline grain are even, the forging stock is cast to the fine and close even flawless big substance of solidification structure, and the ultrasonic inspection qualification rate improves, first one of mould body is cavity insulation construction, and one -dimensional temperature field and high intensity of cooling to the cooling of mould different zone sector selection nature, are set up to the cooling water course and the chassis water -cooling of mould body lower half, and the casting blank sensible heat and the latent heat overwhelming majority are conducted from the chassis, realize directional solidification, use hot after -feeding reservoir, molten glass layer, exothermic compound layer and overburden that inside was equipped with for the shrinkage cavity district mainly concentrates on hot after -feeding reservoir part, has improved the solid height in the hot after -feeding reservoir, and reduction casting blank crop back end crops accounts for and compares.

Description

A kind of strand directional solidification and the Combined water chill mould of regional choice cooling
Technical field
This utility model belongs to metallurgical casting technical field, more particularly to a kind of strand directional solidification and regional choice cooling Combined water chill mould.
Background technology
Coloured and ferrous metal near-net forming continuous casting billet, due to its production efficiency, lumber recovery, product quality, automatization The advantage of the aspect such as degree and energy-saving and emission-reduction obtains fast development, double roller of the casting with rolling mill practice in one is integrated in recent years and is cast Technology particularly Typical Representative is rolled, and continuous casting ratio becomes therewith the finger for weighing various countries' continuous casting technology level and continuous casting equipment manufacturing ability One of mark.Under metallurgical overall situation formed various countries weight continuous casting light molding trend, molding research and it is little using proportion, designed capacity and System innovation lacks.But continuous casting is not met by the specific demand of the special thickness strand in the fields such as nuclear power, high ferro, military project, such as ITER Nuclear radiation shield block and tokamak cooling wall, nuclear steam turbine rotor, type aircraft carrier deck steel, high temperature and high pressure containers steel and high level are built Build shockproof thick plate steel, still rely upon with big forging ratio, big substance, small quantities of various feature molding.
Due to the raising to big substance strand ultrasonic inspection, degree of segregation, grain size, mechanical property and uniformity requirement, Has there is a production difficult problem in substance 50t above forge piece.Generally existing solidified structure compactness is relatively low, center porosity shrinkage cavity is intensive, The low problem demanding prompt solution of flaw detection qualification rate.It is that weight increases to trace it to its cause, and sectional dimension accordingly increases, intensity of cooling and solidifying Gu rate reduction, center coarse grains, tissue looseness, and in the height direction V-type Feeding channel narrows, feeding distance becomes big, Field trash is difficult to float, and the shoulder tissue segregation of falling V, and top shrinkage cavity is serious.
Realize that strand bottom first solidifies, the directional solidification difficult point from bottom to top solidified after rising head is that reinforced bottom is cold But, the insulation of side wall and riser heating, it is intended to which short transverse sets up one-dimensional big gradient temperature field.Side wall insulation is conducive to setting up one-dimensional Big gradient temperature field, but should under the conditions of aluminium alloy freezing rate reduce a lot, rest on that the solid-liquid two-phase region time is long, dendrite has Grace time is grown up, and liquid phase is closed by the segmentation of main dendritic arm, and major branch is brilliant and Models For Secondary Dendrite Arm is mutually overlapped to form small space, obtains Supplement less than liquid phase, form intensive shrinkage porosite and even microsegregation occurs.And for ingot shape is highly more than average diameter ingot shape, bottom Water cooling is limited in one's ability, and when the thermal resistance that strand has been coagulated in bottom is more than die wall thermal resistance, horizontal temperature gradient increases and more than vertical temperature Degree gradient, middle and upper part molten steel heat flow density in the horizontal direction starts more than vertical direction heat flow density, this Two-Dimensional Heat mould Formula is unfavorable for directional solidification.Chinese patent publication No. CN 201168769Y discloses a kind of directional solidification water cooling ingot mould, whole side Wall winding arrangement cooling water pipe, and coordinate water-cooled chassis to accelerate rate of cooling, column crystal is in vertical die wall and chassis two-dimensional directional Solidification.To growth and in ingot casting center overlap joint, shrinkage cavity shrinkage porosity is concentrated mainly on ingot casting center to column crystalline phase under the solidification model.One The shrinkage cavity shrinkage porosity of dimension directional solidification is concentrated mainly in rising head, and this is entirely different with bottom-up one-dimensional directional solidification.Japan The clear 60-33852 of patent discloses water-cooled chassis and surrounding water-cooled dynamic model integrally cools down and compensate the slab ingot die casting process of air gap, should Utility model intensity of cooling and uniformity are greatly improved than natural cooling, obtain the slab of densification.But individually improve intensity of cooling Intensity of cooling can only be improved, directional solidification is possible to terminate, it is impossible to improve Inner Quality of Billet completely.Chinese patent publication No. CN 102161079 A disclose a kind of water-cooled chassis and surrounding water-cooled dynamic model Combined mould, and eliminate gas using big Reduction Technology Gap, and wide and thick slab center porosity, segregation and shrinkage cavity are effectively improved and eliminate, but cannot be by dynamic model around and big pressure to round billet Lower Technology design mold.
It is mutually contradictory to improve intensity of cooling and the insulation of side wall, there is presently no experience and design unifies both Come, it is therefore necessary to designing the directional solidification from bottom to top that round billet is realized under quick pressure cooling condition, finally give cause Close structure organization and the alloy material of excellent properties.
Utility model content
The deficiency that this utility model exists for above-mentioned prior art, there is provided one kind can realize directional solidification and improve The Combined water chill mould of intensity of cooling.
The technical scheme that this utility model solves above-mentioned technical problem is as follows:A kind of strand directional solidification and regional choice are cold But Combined water chill mould, including chassis, the cast die body on the chassis and the heat on the cast die body Feeding head, it is characterized in that, the chassis includes low bottom-disc and top bottom-disc, and cooling cavity is provided with the top bottom-disc, The top bottom-disc is provided with the water inlet and outlet being connected with the cooling cavity;
Cast die body periphery is straight tube structure, interior for inverted round table structure, including the first half and lower half, it is described on The periphery of half portion is provided with hollow insulation layer, and the periphery of the lower half is provided with the separate cooling water channel of multiple tracks;
The hot feeding head is in land structure, and the larger diameter end of the land snaps onto the upper end of the cast die body, It is easy to snapping centering body upper end that boss seam is set.
The beneficial effects of the utility model are:
1st, mold of the present utility model realizes that strand forces from bottom to top cooling and directional solidification, it is to avoid vertical die wall and nothing The column crystal of directional growth is excessively flourishing and make its vertical chassis growth, eliminate center porosity, V-type segregation problems, obtain Crystal grain refinement, ultrasound detection crystal grain are uniform, the flawless big substance of solidified structure dense uniform casts forging stock, and ultrasonic examination is qualified Rate is improved.
2nd, this utility model is broken the normal procedure ingot mould design concept, and the cast die body first half is hollow insulation structure, mold sheet The cooling water channel and chassis water-cooled of body lower half, can take into account and set up one-dimension temperature to the segmentation selectivity cooling of mold zones of different Field and high intensity of cooling, strand sensible heat and latent heat more than 90% conduct from chassis, realize directional solidification.
3rd, this utility model uses hot feeding head, molten glass layers, heating oxidant layer and coating that inside is provided with so that Shrinkage cavity area is concentrated mainly on hot feeding head part, improves the solid height in hot feeding head, reduces strand cutting head cutting tail Accounting.
On the basis of above-mentioned technical proposal, this utility model can also do following improvement.
Further, the top bottom-disc is Be-Co-Cu or red copper material, and in the cooling cavity interlaced resistance is provided with Stream plate.
It is that Be-Co-Cu or red copper material can reduce hot concentration zones temperature using the beneficial effect of above-mentioned further scheme, Quick uniform cools down strand, and heat conductivity is more superior than mould steel 3~4 times;Spoiler can increase heat exchange area, improve water speed And convection transfer rate, most heats that aluminium alloy discharges is conducted by chassis.
Further, the hot feeding head shell is cast iron, and internal layer forms by laying fireproof bricks, it is internal to it is lower and on successively It is provided with molten glass layers, heating oxidant layer and coating.
It is that aluminium alloy in hot feeding head is heated in exothermic mixture burning, subtracts using the beneficial effect of above-mentioned further scheme Thermograde between little hot feeding head and aluminium alloy, delays the alloy part liquid setting time, there is provided Feeding channel it is unimpeded and Enough feeding aluminium alloys;It is slightly longer than the casting blank solidification time that exothermic mixture oxidation heat liberation makes to emit appearance aluminium alloy setting time, exothermic mixture Burning maximum temperature is more than aluminium alloy liquidus temperature;Molten glass layers can effectively intercept exothermic mixture composition pollution aluminium alloy, have Float impurity in effect heat of adsorption feeding head, and makes aluminium alloy and atmospheric isolation;Coating is calcining red charcoal, plays insulation and hinders Only O in air2、N2、H2Deng the effect into aluminium alloy;By the oxidation heat liberation effect of the exothermic mixture of hot feeding head, Mao Ronghe Golden liquid setting time is more than the casting blank solidification time, emits appearance aluminium alloy final set, there is provided solidification feeding liquid.
Further, the molten glass layers are made up of 80wt% Na-Si-Ca glasses and 20wt% boric anhydrides.
Further, the thickness of the molten glass layers is 10-20mm, or controls consumption for ingot casting per ton addition 1-1.2kg Melten glass.
Further, the heating oxidant layer is made up of aluminium powder, oxidant and binding agent.
Further, the heating oxidant layer includes 10-15wt% aluminium powders, 10-15wt%Al2O3, 10-15wt%C, 20- 30wt%Fe2O3, 5wt%NaNO3, 5wt%KNO3And the waterglass and clay of surplus, consumption is that ingot casting per ton adds 1-2kg.
Further, the coating is calcining red charcoal.
It is to play to be incubated and prevent O in air using the beneficial effect of above-mentioned further scheme2、N2、H2Etc. entering alloy The effect of liquid.
Further, filled with zircon ceramic plate and asbestic blanket in described hollow insulation layer;The cast die body lower half Periphery is provided with the separate cooling water channel in three roads, including the first side wall water channel, second sidewall water channel and the 3rd side wall water channel.
It is that hollow insulation layer can extend the cast die body first half and vulcanize using the beneficial effect of above-mentioned further scheme The setting time of aluminium alloy in contracting rising head;Multiple tracks side wall water-cooled takes into account the dual function for improving intensity of cooling and directional solidification;When After the solidification of strand the latter half, the water-cooled effect of top bottom-disc is not gradually obvious, it is impossible to does not coagulate part to the strand first half and plays Cooling effect, heat transfer modes is forced to fade to Two-Dimensional Heat by one dimensional heat transfer, the thermograde of vertical direction is gradually reduced, no longer Continue to meet directional solidification condition.Move with solidification front, open cooling water channel valve, take first segmentation water supply, rear full section to supply The mode of water.After the following aluminium alloy solidification of the first side wall water channel, the valve of the first side wall water channel is opened, be changed to by natural cooling Cooling is forced, its height above aluminium alloy continues to realize directional solidification under high intensity cooling;Progressively move with moving on solidification front To more than second sidewall water channel, the valve of second sidewall water channel is opened afterwards, when appearance aluminium alloy solidification is emitted, open the 3rd side wall The valve of water channel.Aluminium alloy does not coagulate the heat and mass of part and is always to solidification model, and lower half is completed after solidification, side wall water It is cold no longer to change its Solidification Microstructure Morphology.In this case wall water-cooled in side plays the heat transfer effect same with water-cooled copper chassis.Strand Water-cooled copper chassis and side wall water-cooled are improved under intensity of cooling effect, and large dendritic crystal is inhibited in strand, reduce microsegregation and Crystal grain thinning.
Description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 for top bottom-disc structural representation;
Fig. 3 is the temperature variation curve that Dual band IR measures hot feeding head outer wall and cast die body lower half outer wall;
Fig. 4 is natural cooling NARloy-Z crystal grain uniformity ultrasonic testing results;
Fig. 5 is NARloy-Z crystal grain uniformity ultrasonic testing results in this utility model embodiment 1;
Fig. 6 is natural cooling Cu-Cr-Zr crystal grain uniformity ultrasonic testing results;
Fig. 7 is Cu-Cr-Zr crystal grain uniformity ultrasonic testing results in this utility model embodiment 2;
In figure, 1, top bottom-disc;2nd, low bottom-disc;3rd, cast die body;4th, cavity is cooled down;5th, water inlet;6th, outlet;7th, vulcanize Contracting rising head;8th, hollow insulation layer;9th, spoiler;10th, refractory brick;11st, molten glass layers;12nd, heating oxidant layer;13rd, coating; 14th, the first side wall water channel;15th, second sidewall water channel;16th, the 3rd side wall water channel;17th, ingot casting.
Specific embodiment
Principle of the present utility model and feature are described below in conjunction with example, example is served only for explaining this practicality It is new, it is not intended to limit scope of the present utility model.
A kind of strand directional solidification and regional choice cooling Combined water chill mould, including chassis, located at the chassis On cast die body 3 and the hot feeding head 7 on the cast die body, it is characterized in that, under the chassis includes Chassis 2 and top bottom-disc 1, are provided with cooling cavity 4 in the top bottom-disc, the top bottom-disc is provided with and is connected with the cooling cavity Water inlet 5 and outlet 6;
Cast die body periphery is straight tube structure, interior for inverted round table structure, including the first half and lower half, it is described on The periphery of half portion is provided with hollow insulation layer 8, and the periphery of the lower half is provided with the separate cooling water channel in three roads, including first Side wall water channel 14, the side wall water channel 16 of second sidewall water channel 15 and the 3rd;
The hot feeding head is in land structure, and the larger diameter end of the land snaps onto the upper end of the cast die body, The hot feeding head shell is cast iron, and internal layer built by laying bricks or stones by refractory brick 10 and formed, it is internal to it is lower and on be sequentially provided with melten glass Layer 11, heating oxidant layer 12 and coating 13;
The top bottom-disc is Be-Co-Cu or red copper material, and in the cooling cavity interlaced spoiler 9 is provided with;
The molten glass layers are made up of 80wt% Na-Si-Ca glasses and 20wt% boric anhydrides;
The heating oxidant layer includes 10-15wt% aluminium powders, 10-15wt%Al2O3, 10-15wt%C, 20-30wt% Fe2O3, 5wt%NaNO3, 5wt%KNO3And the waterglass and clay of surplus, consumption is that ingot casting per ton adds 1-2kg;
The coating is calcining red charcoal;
Filled with zircon ceramic plate and asbestic blanket in described hollow insulation layer.
As shown in figure 3, due to using exothermic mixture, hot feeding head temperature in longer period of time to be kept approximately constant, Can ensure that inner alloy liquid final set;Cast die body lower half outer wall is molded absorption due to aluminium alloy sensible heat and latent heat, Temperature is first raised, and through the short period peak value is reached, and afterwards strand fast cooling under water-cooled effect, is initially completed solidification.Can Using time that infrared measurement of temperature result peak value is occurred as the time criterion for opening three groups of side wall water channels successively.
Embodiment 1
Combined water chill mould is placed on the lifting platform of vacuum casting room, below 10Pa is evacuated to, graphite crucible is used Cathode copper is warming up to into 1200 DEG C, adds fine silver and sponge zirconium, fusion temperature to be continuously heating to after metal molten in crucible 1300-1350 DEG C, NARloy-Z alloys (Cu-3%Ag-0.5%Zr) liquid is obtained after adjusting component, lower the temperature and stand to 1150- 1200 DEG C of vacuum castings, raise slow reduction lifting platform, it is ensured that soaking water gap below liquid level, prevents aluminium alloy all the time with liquid level It is splashed to interior die wall.End to be cast adds the melten glass prepared by loading hopper, the exothermic mixture of preparation is added immediately, finally Add coverture.
Open water inlet within 5~10 minutes before upper starts, make top bottom-disc and low bottom-disc drop to relatively low temperature.Alloy By pouring in cast die body on submersed nozzle, top bottom-disc internal cooling water channel is separated liquid by spoiler, is improved cooling water and is reached Arrive 12m/s or so.Die wall temperature between the first side wall water channel and second sidewall water channel is measured by infrared radiation thermometer, according to temperature Line of writing music opens the first side wall water channel, design 10~12m/s of water speed or so.Second sidewall water channel is progressively opened according to infrared measurement of temperature With the 3rd side wall water channel, improve strand top and emit the intensity of cooling for holding aluminium alloy, the heat overwhelming majority is passed by top bottom-disc Lead, and set up directional solidification temperature field.
Mirco structure of the NARloy-Z ingot castings after solid gas coupling reinforcing shows and do not observe substantially secondary pipe, low Again tissue shows that column crystal has obvious direction, and ingot blank center is without obvious shrinkage porosite, solidified structure dense uniform.In contrast Fig. 4 Natural cooling ingot blank, the crystal grain refinement of the present embodiment is more uniform in Fig. 5, ultrasonic fault detector probe model used 2.5P20, frequency 2.5MHz, sound intensity 46dB, signal to noise ratio 10-20%.Shrinkage cavity concentrates on hot feeding head top, vulcanizes contracting well, The solid height of hot feeding head is in 60~70mm, maximum height 80mm.Show after NARloy-Z alloy cast ingot heat treatments excellent High temperature tensile properties, high temperature resistance high cycle fatigue ability and creep resisting ability.
Embodiment 2
Combined water chill mould is placed on the lifting platform of vacuum casting room, below 10Pa is evacuated to, graphite crucible is used By cathode copper, 1200 DEG C are warming up to, add fine silver and sponge zirconium, fusion temperature to be continuously heating to after metal molten in crucible 1300-1350 DEG C, Cu-Cr-Zr alloys (Cu-0.65%Cr-0.1%Zr) liquid is obtained after adjusting component, lower the temperature and stand to 1220-1250 DEG C of vacuum casting, raises slow reduction lifting platform, it is ensured that soaking water gap below liquid level, is prevented all the time with liquid level Aluminium alloy is splashed to interior die wall.End to be cast adds the melten glass prepared by loading hopper, and the heating of preparation is added immediately Agent, is eventually adding coverture.
Open water inlet within 5~10 minutes before upper starts, make top bottom-disc and low bottom-disc drop to relatively low temperature.Alloy By pouring into cast die body on submersed nozzle, top bottom-disc internal cooling water channel is separated liquid by spoiler, is improved cooling water and is reached 12m/s or so.Die wall temperature between the first side wall water channel and second sidewall water channel is measured by infrared radiation thermometer, according to temperature Curve opens the first side wall water channel, design 10~12m/s of water speed or so, and according to infrared measurement of temperature second sidewall water channel 32 is progressively opened With the by side wall water channel 33, improve strand top and emit the intensity of cooling for holding aluminium alloy, make the heat overwhelming majority by top bottom-disc Conduction, and set up directional solidification temperature field.
As shown in fig. 7, ultrasonic testing results show that the crystal grain uniformity contrasts natural cooling ingot blank (Fig. 6) and more refines It is even.The ingot casting surface and internal soundness obtained by the present embodiment is all had significant improvement, and is mainly manifested in:1st, ingot casting table Face fine grained region thickness increases, and crystallite dimension reduces, and the column crystal direction of growth strengthens, and ingot blank center is without obvious shrinkage porosite, solidification Dense structure is uniform, ultrasonic fault detector probe model 2.5P20 used, frequency 2.5MHz, sound intensity 46dB, signal to noise ratio 10- 20%;2nd, improve 10-30MPa, elongation after fracture with Cu-Cr-Zr strength of alloy under state increases 10-20%, hardness Also have with the performance such as impact flexibility and largely improve;3rd, rising head fraction is reduced, foundry goods cutting head cutting tail rate is reduced, And played a key effect to extending die life and improve production efficiency by the technology implementation.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit this utility model Within new spirit and principle, any modification, equivalent substitution and improvements made etc. should be included in guarantor of the present utility model Within the scope of shield.

Claims (5)

1. a kind of strand directional solidification and regional choice cooling Combined water chill mould, including chassis, on the chassis Cast die body and the hot feeding head on the cast die body, it is characterised in that the chassis include low bottom-disc and on Chassis, is provided with cooling cavity in the top bottom-disc, the top bottom-disc be provided with the water inlet that is connected with the cooling cavity and Outlet;
Cast die body periphery is straight tube structure, interior for inverted round table structure, including the first half and lower half, the first half Periphery be provided with hollow insulation layer, the periphery of the lower half is provided with the separate cooling water channel of multiple tracks;
The hot feeding head is in land structure, and the larger diameter end of the land snaps onto the upper end of the cast die body, is easy to Snapping centering body upper end arranges boss seam.
2. Combined water chill mould according to claim 1, it is characterised in that the top bottom-disc is Be-Co-Cu or red copper material Matter, in the cooling cavity interlaced spoiler is provided with.
3. Combined water chill mould according to claim 1, it is characterised in that the hot feeding head shell is cast iron, Internal layer is formed by laying fireproof bricks, it is internal to it is lower and on be sequentially provided with molten glass layers, heating oxidant layer and coating.
4. Combined water chill mould according to claim 3, it is characterised in that the thickness of the molten glass layers is 10- 20mm。
5. Combined water chill mould according to claim 1, it is characterised in that zirconium is filled with described hollow insulation layer Ceramic wafer and asbestic blanket;The periphery of the cast die body lower half is provided with the separate cooling water channel in three roads, including the first side Wall water channel, second sidewall water channel and the 3rd side wall water channel.
CN201620994092.4U 2016-08-30 2016-08-30 Casting blank directional solidification and regional refrigerated combination formula junker mold of selecting Active CN206169262U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106180659A (en) * 2016-08-30 2016-12-07 烟台万隆真空冶金股份有限公司 A kind of strand directional solidification and the Combined water chill mould of regional choice cooling
CN107790689A (en) * 2017-10-30 2018-03-13 中国航发动力股份有限公司 A kind of water cooled copper plate device and its processing method for improving circulating water effect
CN108746564A (en) * 2018-05-03 2018-11-06 清华大学 The method for realizing directional solidification based on 3D printing multilayer hollow shell mould
CN109482827A (en) * 2018-11-16 2019-03-19 中国航发西安动力控制科技有限公司 Copper alloy prepares crystallizer
CN110252958A (en) * 2019-06-21 2019-09-20 西安交通大学 It is a kind of based on listrium it is hollow/porous structure inhibit listrium stray crystal defect blade casting mold preparation method
CN111299552A (en) * 2020-02-28 2020-06-19 重庆大学 Ultrasonic vibration cold air circulation rapid solidification device and method thereof
CN112045168A (en) * 2020-09-07 2020-12-08 北京理工大学 Casting mold and temperature control method and device thereof

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106180659A (en) * 2016-08-30 2016-12-07 烟台万隆真空冶金股份有限公司 A kind of strand directional solidification and the Combined water chill mould of regional choice cooling
CN106180659B (en) * 2016-08-30 2018-01-02 烟台万隆真空冶金股份有限公司 A kind of strand directional solidification and the Combined water chill mould of regional choice cooling
CN107790689A (en) * 2017-10-30 2018-03-13 中国航发动力股份有限公司 A kind of water cooled copper plate device and its processing method for improving circulating water effect
CN108746564A (en) * 2018-05-03 2018-11-06 清华大学 The method for realizing directional solidification based on 3D printing multilayer hollow shell mould
CN108746564B (en) * 2018-05-03 2019-07-12 清华大学 The method for realizing directional solidification based on 3D printing multilayer hollow shell mould
CN109482827A (en) * 2018-11-16 2019-03-19 中国航发西安动力控制科技有限公司 Copper alloy prepares crystallizer
CN110252958A (en) * 2019-06-21 2019-09-20 西安交通大学 It is a kind of based on listrium it is hollow/porous structure inhibit listrium stray crystal defect blade casting mold preparation method
CN110252958B (en) * 2019-06-21 2021-04-20 西安交通大学 Blade casting mold preparation method for inhibiting edge plate mixed crystals based on hollow/porous structure
CN111299552A (en) * 2020-02-28 2020-06-19 重庆大学 Ultrasonic vibration cold air circulation rapid solidification device and method thereof
CN112045168A (en) * 2020-09-07 2020-12-08 北京理工大学 Casting mold and temperature control method and device thereof

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