CN110076326A - A kind of electroslag smelting casting shaped piece crystallizer water route control method - Google Patents
A kind of electroslag smelting casting shaped piece crystallizer water route control method Download PDFInfo
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- CN110076326A CN110076326A CN201910417223.0A CN201910417223A CN110076326A CN 110076326 A CN110076326 A CN 110076326A CN 201910417223 A CN201910417223 A CN 201910417223A CN 110076326 A CN110076326 A CN 110076326A
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- crystallizer
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- shaped piece
- control method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
- B22D23/06—Melting-down metal, e.g. metal particles, in the mould
- B22D23/10—Electroslag casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A kind of electroslag smelting casting shaped piece transversely layered crystallizer water route control method, crystallizer is divided into several layers according to crystallizer height, Inlet and outlet water is parallel-connection structure between layers, every layer of water inlet can require independent control switch and water size according to founding, cooling water folding shape flowing is realized by the gusset being interspersed in single layer of crystalline device, inlet and outlet pipes are located at layer bottom end or layer upper end, and inlet and outlet pipes are not in the same end with the gap of leaking water of adjacent webs.The present invention mitigates or even eliminates crystallizer poor dimensional stability and the even problem of casting entirety inhomogeneous cooling in shaped piece ESR Process, improves crystallizer dimensional stability, prolongs the service life.
Description
Technical field
The invention belongs to field of material processings, and in particular to it is molten especially to provide a kind of electroslag for crystallizer water route control method
Cast shaped piece crystallizer water route control method.
Background technique
Electroslag smelting casting be integrate fusing, refining, solidification, near-net forming casting method, be production high-quality casting
One of important channel.With the continuous development of equipment manufacture, various countries are increasing the demand of electroslag casting.In abnormity
In part electroslag smelting casting production process, because of cast shape varying dimensions, copper plate shape is complicated, and relevant housing, waterway structure are also more
The problem of adding complexity, bringing is that rear crystallizer dimensional stability decline is used for multiple times, and influences crystallizer service life and casting quality.
Technical staff has been working hard trial and improves crystallizer dimensional stability, reduces mould deformation to casting quality band
The adverse effect come.It summarizes previous various technologies and there is no effective means thoroughly to eliminate knot for special-shaped casts electroslag smelting casting
The problem of brilliant device dimensional stability declines.
By literature search, raising crystallizer dimensional stability, the correlation to prolong the service life have been published both at home and abroad
(such as " China YouSe Acta Metallurgica Sinica " the 8th phase of volume 22 in 2012, Meng Xiangning, Wang Weiling, Zhu Miaoyong, cooling structure is to even for document
Cast the influence of copper plate of crystallizer stress distribution；" metallurgical equipment " the 6th phase in 2001, Shen Xianguang, Zhang Yujun, Meng Minzhong, crystallizer
Influence of the relevant parameter to its service life；" journal of shenyang institute of aeronautical engineering " the 3rd phases of volume 19 in 2002, Li Qingzhong, Wang Zheming, in
Elegant female, billet mould cavity shape local improvement and life test research etc.).
Although above-mentioned technology has many advantages, it is primarily adapted for use in continuous casting, steel ingot simple shape crystallizer, and solution party
Fado is local parameter fine tuning, it is difficult to effectively be applied to the design and manufacture of special-shaped casts crystallizer.In electroslag smelting casting special-shaped casts
In terms of Latent Heat, it still can not thoroughly solve the problems, such as rear size is used for multiple times unstable.
Summary of the invention
In order to overcome drawbacks described above, it is an object of the invention to mitigate or even eliminate in shaped piece ESR Process to crystallize
Device poor dimensional stability and the even problem of casting inhomogeneous cooling, provide a kind of electroslag smelting casting shaped piece transversely layered crystallizer water
Road control method improves crystallizer dimensional stability, prolongs the service life.
A kind of electroslag smelting casting shaped piece transversely layered crystallizer water route control method, according to crystallizer height by crystallizer
It is divided into several layers, Inlet and outlet water is parallel-connection structure to crystallizer between layers, and every layer of water inlet can require individually control to open according to founding
It closes and water size, realizes cooling water folding shape flowing by the gusset being interspersed in single layer of crystalline device, inlet and outlet pipes are located at layer
Bottom end or layer upper end, inlet and outlet pipes are not in the same end with the gap of leaking water of adjacent webs.
The purpose of the present invention is what is realized by following measures:
A kind of electroslag smelting casting shaped piece transversely layered crystallizer water route control method, specific step is as follows for this method:
1) crystallizer molded line size design；The inner cavity molded line ruler of crystallizer is designed according to cast shape and technique requirement
It is very little.
2) crystallizer be layered: crystallizer is layered, every 200~350mm of layer height, according to crystallizer height determine the number of plies with
Every layer of specific height.
3) water route is designed: waterway structure, cooling water enter design crystallizer from every layer of side water inlet pipe between layers, separately
Outlet pipe outflow in side can require independent control switch and water size according to founding.
4) gusset designs: gusset is vertically staggered, and inner cavity copper sheet 1 and external water jacket steel plate 3 are parallel construction, the two
Four sides (up and down) form closed water cavity Cooling Water by the closing of side flange plate 5 and circulate, and are connected by inlet and outlet pipes 4 with outside
Logical, gusset 2 arranges form waterway channel therebetween；Gusset is vertically staggered, adjacent webs 50~150mm of spacing, muscle
Plate forms waterway channel, while playing fixed function to copper sheet.
5) it positioning assembling: after the completion of each layer crystallizer manufacture, is assembled by boring positioning, bolt fastening, completes whole system
It makes.
The crystallizer is combination opposite opened, i.e. to opening structure, every valve is combined crystallizer generally two valves by multiple-layer stacked
It forms, fixation is bolted in combination and the split assembling of each layer.
The direct water route of each layer of crystallizer is parallel-connection structure, and the water inlet pipe of each layer crystallizer is separated from total water inlet end,
Cooling water enters total collection water end (W.E.) after flowing through this layer of crystallizer in every layer of water inlet pipe, is not involved in the cooling of other layer of crystallizer.
Every layer of crystallizer includes copper sheet, side flange plate, gusset, water jacket steel plate, inlet and outlet pipes after crystallizer layering, respectively
Structure passes through welded connecting.
Gusset vertical direction one end is welded in flanged plate, and the other end and opposite flange reserve away water space, between leaking water
Gap height is 15~40mm, and adjacent webs can not be welded in same end flanges.
The water inlet pipe and outlet pipe are located at each crystallizing layer bottom end or upper end, are not in same with the gap of leaking water of adjacent webs
One end.
Compared with prior art, the present invention possessed advantage is as follows:
(1) the main reason for crystallizer size misalignment is that fusion-casting process expands with heat and contract with cold repeatedly, the bigger ruler of monolithic copper sheet area
Very little misalignment is more obvious.The present invention can reduce monolithic copper sheet area by transversely layered compared with prior art, under same case,
Be conducive to the case where mitigating copper plate distortion, alleviating crystallizer poor dimensional stability.
(2) compared with prior art, crystallizer gusset quantity increases, and enhances the fixed function of inner cavity copper sheet, is conducive to limit
Copper plate distortion processed improves crystallizer dimensional stability.
(3) water route is cascaded structure, bottom water inlet, top water outlet, the crystallizer top in fusion-casting process under the prior art
Water temperature be higher than lower part water temperature, waterway structure of the present invention be it is parallel, every layer individually water inlet water outlet, crystallizer entirety distribution of water temperature is more
Add uniformly, avoids cooling water temperature unevenly to the influence of mould deformation.
(4) under the conditions of water route in parallel, distribution of water temperature is uniformly conducive to casting cooling uniformly, improves the equal of Solidification Microstructure of Castings
One property, meanwhile, inflow can be turned down to the region for completing founding according to the technological requirements, save water resources consumption.
Detailed description of the invention
With reference to the accompanying drawing and embodiment is described in further detail the principle of the invention:
Fig. 1: gusset of the present invention, inlet and outlet pipes schematic layout pattern；
Fig. 2: water route width diagram；
Fig. 3: plate slab crystallizer single layer structure schematic diagram；
Wherein, 1 inner cavity copper sheet, 2 gussets, 3 water jacket steel plates, 4 inlet and outlet pipes, 5 side flange plates.
Specific embodiment
The present invention is described further combined with specific embodiments below, but protection scope of the present invention is not by embodiment
Limitation, if the person skilled in the art in the field makes some nonessential improvement to the present invention according to aforementioned present invention content
And adjustment, still fall within protection scope of the present invention.
Embodiment 1:
The martensitic stain less steel guide vanes of water turbine that material is 06Cr13Ni4Mo is chosen, is manufactured by electroslag casting process.
(1) according to the geomery of guide vane and technical requirements, design technology subsidy amount determines crystallizer internal cavity size；
(2) crystallizer is fabricated structure, and upper crystallizer is simple straight tube shape, using conventional design method, lower crystallization
Device uses transversely layered design of control method.Water route width between copper sheet and parallel flanged plate is 20~25mm, such as 2 institute of attached drawing
Show.Crystallizer internal cavity copper sheet is metal hot bending+machining process preparation, 16~20mm of thickness.
(3) it is 1505mm that whole height is crystallized under, and design is divided into 5 layers, the every layer height 300mm in 4 layers of lower part, top layer
305mm.Gusset, inlet and outlet pipes layout are as shown in Figure 1, crystallizer cooled region width 1200mm, designs 9 vertical gussets, phase
Adjacent 100~110mm of gusset interval, height 25mm between gusset and upper and lower flanged plate.As shown in Fig. 2.
(4) manufacturing process: copper sheet preparation-gusset, flanged plate, flag prepare-weld copper sheet and 4 faces flanged plate-weldering
Gusset is connect to copper sheet and companion flange plate-solder mask steel plate.
(5) side flange drilling welding inlet and outlet pipes.
(6) lower flange processing guarantees flatness, each layer crystallizer positioning assembly on.
(7) fusion-casting process
1. slag system and the quantity of slag match, CaF2: 70%, Al2O3: 30%, slag charge weight is the 2% of guide vane weight.
2. using the solid slag starting the arc, starting the arc material chemical component is TiO with mass percent2: 45%, CaF2: 53%, MgO:
2%.
3. power supply parameter selects: being determined according to the geometric parameter of electrode and crystallizer and match electrical parameter.
4. initial intake pressure 0.3Mpa is arranged, alternating floor decompression.For example, topmost is 5 layers with bottommost for 1 layer.
The liquid top of the slag rises to the 3rd layer and rises, and turning 1 layer of intake pressure after 30min down is 0.2Mpa.
Embodiment 2:
The martensitic stainless steel base that material is 06Cr13Ni4Mo is chosen, is manufactured by electroslag casting process.
(1) according to the geomery of slab and technical requirements, design technology subsidy amount determines crystallizer internal cavity size；
(2) crystallizer is fabricated structure, using transversely layered design of control method.Between copper sheet and parallel flanged plate
Water route width is 25mm, as shown in Fig. 3.16~20mm of crystallizer internal cavity copper plate thickness.
(3) height 1200mm is crystallized, is divided into 5 layers, every layer height 240mm.Crystallizer cooled region width 590mm, design 7
The vertical gusset of item, adjacent webs interval 60mm, height 25mm between gusset and upper and lower flanged plate.As shown in Fig. 3.
(4) manufacturing process: copper sheet preparation-gusset, flanged plate, flag prepare-weld copper sheet and 4 faces flanged plate-weldering
Gusset is connect to copper sheet and companion flange plate-solder mask steel plate.
(5) side flange drilling welding inlet and outlet pipes.
(6) lower flange processing guarantees flatness, each layer crystallizer positioning assembly on.
(7) fusion-casting process
1. slag system and the quantity of slag match, CaF2: 70%, Al2O3: 30%, slag charge weight is the 2% of guide vane weight.
2. using the solid slag starting the arc, starting the arc material chemical component is TiO with mass percent2: 45%, CaF2: 53%, MgO:
2%.
3. power supply parameter selects: being determined according to the geometric parameter of electrode and crystallizer and match electrical parameter.
Claims (8)
1. a kind of electroslag smelting casting shaped piece transversely layered crystallizer water route control method, it is characterised in that: this method specifically walks
It is rapid as follows:
1) crystallizer molded line size design；
2) crystallizer is layered: crystallizer is layered；
3) water route is designed: waterway structure, cooling water enter design crystallizer from every layer of side water inlet pipe between layers, the other side
Outlet pipe outflow, can be controlled separately switch and water size；
4) gusset designs: gusset is vertically staggered, and inner cavity copper sheet (1) and external water jacket steel plate (3) are parallel construction, the two
Four sides (up and down) form closed water cavity Cooling Water by side flange plate (5) closing and circulate, and pass through inlet and outlet pipes (4) and outside
Connection, gusset (2) arrange form waterway channel therebetween；
5) it positioning assembling: after the completion of each layer crystallizer manufacture, is assembled by boring positioning, bolt fastening, completes whole manufacture.
2. electroslag smelting casting shaped piece according to claim 1 transversely layered crystallizer water route control method, feature exist
In: the crystallizer is combination opposite opened, i.e. to opening structure, every valve is composed of crystallizer generally two valves multiple-layer stacked,
Fixation is bolted with split assembling in the combination of each layer.
3. electroslag smelting casting shaped piece according to claim 1 transversely layered crystallizer water route control method, feature exist
In: every layer of 200~350mm of crystallizer height.
4. electroslag smelting casting shaped piece according to claim 1 transversely layered crystallizer water route control method, feature exist
In: the direct water route of each layer of crystallizer is parallel-connection structure, and the water inlet pipe of each layer crystallizer is separated from total water inlet end, every layer
Cooling water enters total collection water end (W.E.) after flowing through this layer of crystallizer in water inlet pipe, is not involved in the cooling of other layer of crystallizer.
5. electroslag smelting casting shaped piece according to claim 1 transversely layered crystallizer water route control method, feature exist
In: every layer of crystallizer includes copper sheet, side flange plate, gusset, water jacket steel plate, inlet and outlet pipes, each structure after the crystallizer layering
Pass through welded connecting.
6. electroslag smelting casting shaped piece according to claim 1 transversely layered crystallizer water route control method, feature exist
In: the gusset is 50~150mm with gusset spacing.
7. electroslag smelting casting shaped piece according to claim 1 transversely layered crystallizer water route control method, feature exist
In: gusset vertical direction one end is welded in flanged plate, and the other end and opposite flange reserve away water space, clearance height of leaking water
For 15~40mm, adjacent webs can not be welded in same end flanges.
8. electroslag smelting casting shaped piece according to claim 1 transversely layered crystallizer water route control method, feature exist
In: the water inlet pipe and outlet pipe are located at each crystallizing layer bottom end or upper end, are not in the same end with the gap of leaking water of adjacent webs.
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| CN201910417223.0A CN110076326A (en) | 2019-05-20 | 2019-05-20 | A kind of electroslag smelting casting shaped piece crystallizer water route control method |
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Application publication date: 20190802 |