CN102836970B - Polygon steel ingot water-cooled die casting method and water-cooled die casting device - Google Patents
Polygon steel ingot water-cooled die casting method and water-cooled die casting device Download PDFInfo
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Abstract
The present invention relates to a kind of polygon steel ingot water-cooled die casting method and water-cooled die casting device, belong to the production technical field of steel ingot.The present invention is the die cavity of cast n limit shape steel ingot, is made up of n/2 main mould and n/2 angle mould.Main mould is regulated by oil cylinder, and during to ensure steel ingot volume contraction, die body cooling position is adjacent to flyer all the time.During cast, molten steel carries out heat exchange by liner plate under water-cooled condition, cooled by molten steel rapidly, and then crystallization and freezing becomes steel ingot.Adopt the present invention, the steel ingots such as pourable carbon steel, steel alloy, mould steel, stainless steel.Steel ingot specification circumscribed circle diameter≤1510mm, ingot height degree≤5000mm; Steel ingot lumber recovery >=95%; Test piece is cut without visible shrinkage cavity along rising head line; The macrostructure center segregation, center porosity, middle crack, cellular bubble etc. of steel ingot all should be less than 0.5 grade; Cross section equiaxial crystal ratio >=30%.The present invention effectively can improve stock utilization, reduces steel ingot die loss, improves ingot quality.
Description
Technical field:
The present invention relates to a kind of polygon steel ingot water-cooled die casting method and water-cooled die casting device, belong to the production technical field of steel ingot, particularly relate to that ratio of height to diameter is large, ingot body is without the steel ingot more than hexagon of shrinkage cavity, cross section equiaxial crystal ratio >=30%.
Background technology:
Current forging, rolling equal pressure processing polygon steel ingot all adopt cast iron steel ingot mould to produce, and traditional cast iron mould and production technology thereof, exist many shortcoming and defect:
1, Steel ingot feeder head ratio is large, and lumber recovery is low;
2, steel ingot ratio of height to diameter is restricted.
The defects such as 3, pipe, fold easily appear in surface of steel ingot, stammerer;
4, easily there is shrinkage cavity, loose, segregation in steel ingot inside, the quality problems such as column crystal is flourishing;
5, steel ingot mold life is short, and cleaning is complicated;
6, poor working environment, labour intensity is large.
As Chinese patent (Authorization Notice No.: CN100531960C) discloses a kind of wide and thick slab die casting machine and Wide and Thick Slab casting blank process thereof, when the method molten steel is from steel ladle pouring to feed trumpet, from top to bottom inject, runner brick road on cast chassis, injected from bottom to top in die cavity by bleeder again, the molten steel of top rising head carries out feeding downwards, molten steel casts width after cooling rapidly from bottom to top can reach 400-4000mm, thickness will reach 150-1000mm, length can reach the cuboid slab of 1600-4000mm, this invention die casting machine is primarily of host machine part, fluid power system, cooling water recirculation system, molten steel running gate system forms, this host machine part includes the two fan bodies be oppositely arranged and is arranged in frame, be flexibly connected with frame by folding mould oil cylinder and linkage, body is provided with multiple module, each module forms die cavity by main die body and limit die body, main die body is fixed on body, module upper end is provided with rising head device, lower end is located on cast chassis, cast chassis is contained on bracket, oil pump device and folding mould oil cylinder, safe cushion block oil cylinder, pressure plate cylinder, limit mould telescopic oil cylinder, locking cylinder is connected and forms fluid power system, the water gap arranged in module communicates with cooling recirculation system.Therefore this invention can only realize the casting of the wide and thick slab of quadrangle, cannot die casting for steel ingot more than hexagon.
Summary of the invention:
The object of the present invention is to provide quality problems inside and outside a kind of steel ingot that can overcome the existence of traditional cast iron mold technique, ensure steel ingot cross section equiaxial crystal ratio >=30%, a kind of polygon steel ingot water-cooled die casting method of lumber recovery >=95% and water-cooled die casting device.
Technical scheme: the present invention is achieved through the following technical solutions:
Polygon steel ingot water-cooled die casting method of the present invention is as follows: low temperature is cast soon, namely higher than the molten steel of liquidus curve 15 DEG C-40 DEG C, polygon die cavity is injected through feed trumpet, soup road with 6-20mm/s injection rate, cooled and solidified during the temperature < 70 DEG C of water in water cooled mo(u)ld, steel ingot list props up or branched cast.
Pour into a mould the circumscribed circle diameter≤1510mm of described steel ingot, highly≤5000mm.
Polygon steel ingot water-cooled die casting method water-cooled die casting device, comprise main body, slave body, fluid power system, cooling water recirculation system, molten steel running gate system, main body and slave body are provided with mould bases, mould bases inner surface is n limit shape structure, n is even number, mould bases is provided with n/2 main mould and n/2 angle mould, angle mould is triangle mould, angle mould is fixed on mould bases, main mould is embedded with between adjacent angle mould, n limit shape steel ingot die cavity is formed after main mould two sides and angle mould two sides fit, main body is provided with main body folding oil cylinder, slave body is provided with slave body folding oil cylinder, main body folding oil cylinder and slave body folding oil cylinder are flexibly connected with frame by linkage, mould bases both sides are provided with the tight press plate mechanism of template lock, main body and slave body are linked into an integrated entity by die body locking cylinder.
Described main mould is regulated by oil cylinder, and during to ensure steel ingot volume contraction, die body cooling position is adjacent to flyer all the time from n/2 direction.
Ingot steel casting chassis in described molten steel running gate system is arranged soup road shearing device.
Described soup road shearing device comprises: be arranged at the rectangular channel on ingot steel casting chassis, is provided with the rectangular block that can slide along rectangular channel in rectangular channel, and rectangular block is connected with deduction oil cylinder.
Advantage and effect:
Advantage of the present invention is: each module forms n limit shape die cavity by n/2 main mould and n/2 angle mould, and structure is unique and be easy to manufacture; Vertical rising pouring, water circulation is cold by force, the heat exchange of water gap type, makes molten steel in die body die cavity, be in static state without External Force Acting, rapid cooling, crystallization, solidify, become ingot, surface of steel ingot is bright and clean, lumber recovery >=95%, steel ingot dense internal organization, without loose, segregation, cross section equiaxial crystal ratio >=30%; The heat fatigue distortion of die body liner, service life >=1000 times, need only change die body when exceeding access times and can continue to produce, mould consumes low; Adopt hydraulic-driven, electrichydraulic control, stable drive, safe and reliable, easy and simple to handle, automaticity is high; Quality of cooling water without particular/special requirement, as long as be no more than 70 DEG C.
Accompanying drawing illustrates:
Accompanying drawing 1 is primary structure schematic diagram of the present invention;
Accompanying drawing 2 is the A direction view in accompanying drawing 1:
Accompanying drawing 3 is the B direction view in accompanying drawing 1
Detailed description of the invention:
The present invention mainly comprises host machine part, fluid power system, cooling water recirculation system, molten steel running gate system, power supply and electrohydraulic control system and Combined hydraulic suspender, operating platform and protector.Host machine part comprises frame 1, main body 4, slave body 5, mould bases 6, chassis 21 and bracket 23 thereof; Main body 4, slave body 5 to be arranged in frame 1, are flexibly connected with frame by main body folding oil cylinder 10, slave body folding oil cylinder 11 and linkage; Body is provided with the module of casting polygon (n limit) steel ingot, and each module forms n limit shape die cavity by n/2 main mould 8 and n/2 angle mould 9; The upper end of module is provided with rising head device, and lower end seat is on cast chassis 21, and cast chassis 21 is contained on bracket 23; Bracket 23 and frame 1 are rigidly connected and are integrated.Molten steel running gate system comprises feed trumpet 20 and cast chassis 21, and feed trumpet 20 stands on cast chassis 21, and feed trumpet 20 and cast chassis 21 are built pipe brick and runner brick, forms a complete and rational ladle canal 22, is drawn by molten steel in the die cavity noting and arrive each module.Fluid power system comprises main body folding oil cylinder 10, slave body folding oil cylinder 11, body hoist cylinder 16, die body locking cylinder 13, pressure plate cylinder, safe briquetting oil cylinder 18, main mould telescopic oil cylinder, soup road cut-out oil cylinder.Cooling water recirculation system is made up of water pump, water tank and pipeline, and the water gap arranged in module communicates with cooling water recirculation system.
Form the module of n limit shape die cavity, comprise n/2 main mould, a n/2 angle mould, be the full steel structure that n opens, main mould and angle mould are made up of liner, water gap, shell body; Angle mould body is fixed on body by angle mould hitch; Water gap communicates with the upper point water box and lower point of water box being connected in shell body two ends, and a point water box outerplanar place has bellows to be connected with body by module with sealing gasket.
Be provided with module locking device between major-minor body, module locking device comprises locking cylinder, pressure plate cylinder, pressing plate.
The upper end of body is provided with water leg, and lower end is provided with bypass channel, point, water leg is connected with module water gap respectively, the other end is connected with return pipe with the water inlet pipe of homonymy respectively, and return pipe is connected with water tank, and water inlet pipe is connected with water tank by water pump.
Frame is provided with safe cushion block, and what be connected with safe cushion block has safe cushion block oil cylinder.
Body is flexibly connected with frame by hydraulic open-close mould oil cylinder and quadric chain together with module.Adjustable chassis bracket and rigidity of frame are connected to form entirety, form trunk and the basis of main frame.
Frame is also equipped with hydraulic safe pad device except folding mould oil cylinder and quadric chain are housed, body can be dropped on safe cushion block stably when die sinking.
Below in conjunction with accompanying drawing, the present invention is elaborated.
In FIG: 4-main body, 5-slave body, 6-mould bases, the main mould movement device of 7-, the main mould of 8-, 9-angle mould, 10-main body folding oil cylinder, 11-slave body folding oil cylinder, 12-die body locking pressure plate mechanism, 13-die body locking cylinder.
In fig. 2: 1-frame, 2-column agency, 3-beam part, 14-body elevating mechanism, 15-body folding guide rail, 16-body hoist cylinder, 17-soup road cuts off oil cylinder, the safe briquetting oil cylinder of 18-, 24-water inlet pipe, 25-return pipe.
In figure 3: the safe briquetting of 19-, 20-feed trumpet, 21-pours into a mould chassis, 22-runner brick road, 23-bracket.
During polygon steel ingot casting of the present invention, main body 4, slave body 5 are in opening together with mould bases 6, main mould 8, angle mould 9.1. in the groove on cast chassis 21, runner brick road 22 is puzzled on request; 2. start oil pump device, by electrichydraulic control station first handling safety cushion block oil cylinder 18, safe cushion block 19 is retracted: 3. distinguish operating host body folding oil cylinder 10, slave body folding oil cylinder 11, make two fan bodies drive mould bases 6, main mould 8, angle moulds 9 etc. to complete matched moulds; 4. body hoist cylinder 16 is operated, drive lifting structure 14, body is made to drop on cast chassis 21 and runner brick road 22 relatively stably together with module, now major-minor body is closed configuration: 5. operable lock locking oil cylinder 13 extend out to terminal, operated clamp oil cylinder 12 stretches out the nut back making locking pressure plate insert the piston rod front end of locking cylinder 13 again, and then operable lock locking oil cylinder 13 makes piston rod regain, now each die body is in locking state; 6. feed trumpet 20 and feed trumpet brick are installed: 7. hang lining heat-insulating shield in the rising head position of die cavity; 8. start pumping plant, water is introduced body bypass channel from water tank by water inlet pipe 24 by water pump, enters the water gap of each die body respectively, flows into body water leg from the bellows of the upper end of die body, then by return pipe 25 to water tank; 9. when water circulation is unimpeded, start pouring molten steel, molten steel injects the feed trumpet brick road in feed trumpet 20 fast from steel ladle, the runner brick road 22 on chassis flows into the die cavity of each die body, when molten steel waters certain altitude to the rising head of die body upper end, stop cast.Molten steel now in each die cavity contacts with die body liner, realizes heat exchange and rapid condensation becomes steel ingot by the recirculated cooling water in die body water gap; 10. operate soup road and cut off oil cylinder 17, cut off soup road; (11) die sinking takes off ingot.The program of de-ingot is: a hangs out feed trumpet; B operates electrichydraulic control station, and locking cylinder piston rod is stretched out; C operated clamp oil cylinder makes pressing plate exit after the nut of locking cylinder piston rod front end; D operable lock locking oil cylinder is all retracted to terminal; E operates body hoist cylinder, and body departs from chassis in the support of quadric chain; Operation body folding oil cylinder, pulls major-minor body to open respectively and leans against in frame; The steel ingot that now each casting completes is arranged in the upper plane on chassis respectively; F handling safety cushion block oil cylinder stretches out, and promotes safe cushion block to body lower end, in case stop machine body falls naturally; G overhead traveling crane dedicated hydraulic combined sling of slinging falls and is transported to steel ingot storage space after picking up steel ingot above steel ingot; H closes electrichydraulic control station and water pump, prepares cast next time.
Process characteristic of the present invention adopts vertical bottom running, cryogenic fast injection, namely higher than the molten steel of liquidus curve 15 DEG C-40 DEG C, through feed trumpet, soup road, (6-20mm/s) injects polygon die cavity fast, quick solidification under the strong cooling of water cooled mo(u)ld, forms feeding mode in rising pouring.Mold cavity is in the plateau without any External Force Acting, and the molten steel of top rising head carries out feeding downwards, molten steel cooling, crystallization rapidly from bottom to top, solidifies, becomes ingot, is frozen into the steel ingot finished product of the approximate full equiaxed grain structure of dense structure.Cast that steel ingot list props up (or branched), by changing die body and adjustment rising head heat-insulating shield position, can adapt to pour into a mould circumscribed circle diameter≤1510mm, the steel ingot of the different size of highly≤5000mm.
Claims (1)
1. polygon steel ingot water-cooled die casting method water-cooled die casting device, comprise: main body (4), slave body (5), fluid power system, cooling water recirculation system, molten steel running gate system, main body (4) and slave body (5) are provided with mould bases (6), it is characterized in that, mould bases (6) inner surface is n limit shape structure, n is even number, mould bases (6) is provided with n/2 main mould (8) and n/2 angle mould (9), angle mould (9) is triangle mould, angle mould (9) is fixed on mould bases (6), main mould (8) is embedded with between adjacent angle mould (9), main mould movement device (7) makes main mould (8) mobile, n limit shape steel ingot die cavity is formed after main mould (8) two sides and angle mould (9) two sides fit, main body (4) is provided with main body folding oil cylinder (10), slave body (5) is provided with slave body folding oil cylinder (11), main body folding oil cylinder (10) and slave body folding oil cylinder (11) are flexibly connected with frame by linkage, mould bases (6) both sides are provided with the tight press plate mechanism of template lock, main body (4), slave body (5) is linked into an integrated entity by die body locking cylinder (13),
Described main mould is regulated by oil cylinder, and during to ensure steel ingot volume contraction, die body cooling position is adjacent to flyer all the time from n/2 direction;
Ingot steel casting chassis (21) in described molten steel running gate system arranges soup road shearing device (17);
Described soup road shearing device (17) comprising: be arranged at the rectangular channel on ingot steel casting chassis (21), is provided with the rectangular block that can slide along rectangular channel in rectangular channel, and rectangular block is connected with deduction oil cylinder.
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| CN201210336669.9A CN102836970B (en) | 2012-08-29 | 2012-08-29 | Polygon steel ingot water-cooled die casting method and water-cooled die casting device |
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| CN201210336669.9A CN102836970B (en) | 2012-08-29 | 2012-08-29 | Polygon steel ingot water-cooled die casting method and water-cooled die casting device |
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| CN102836970B true CN102836970B (en) | 2015-09-23 |
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| CN103286300B (en) * | 2013-06-20 | 2015-11-25 | 秦希满 | A kind of vibration water-cooled die casting method |
| CN114799091A (en) * | 2022-04-13 | 2022-07-29 | 山西太钢不锈钢股份有限公司 | Steel ingot mold for stainless steel pipe blank with low head-to-volume ratio and steel ingot production method |
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