CN107262685A - 50t is with the die casting method of higher level's Large Flat steel ingot - Google Patents
50t is with the die casting method of higher level's Large Flat steel ingot Download PDFInfo
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- CN107262685A CN107262685A CN201710369682.7A CN201710369682A CN107262685A CN 107262685 A CN107262685 A CN 107262685A CN 201710369682 A CN201710369682 A CN 201710369682A CN 107262685 A CN107262685 A CN 107262685A
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- ingot
- steel ingot
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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
- B22D7/00—Casting ingots, e.g. from ferrous metals
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- Continuous Casting (AREA)
Abstract
The invention discloses a kind of 50t and the die casting method with higher level's Large Flat steel ingot, during the molding, the cast degree of superheat of molten steel is 32~36 DEG C, and the steel ingot ingot body duration of pouring is 23~28min, and the ingot head opening duration of pouring is 7~9min；It is poured 30~60min, ingot mould cap mouthful capping stay-warm case.This method is easy to operation, can improve steel ingot internal soundness, reduces the defects such as the loose, shrinkage cavity of ingot head, can also prevent surface of steel ingot crackle, reduces molding 50t and waste product with higher level's Large Flat steel ingot caused by crack defect is outside the plan.This method is used compared with low overheat, slower poring rate, and ingot steel casting finishes rear 30min caps mouthful capping stay-warm case, longer demoulding time and stacking slow cooling time, reaches good internal soundness and surface effect.
Description
Technical field
The present invention relates to a kind of die casting method, especially a kind of 50t and the die casting method with higher level's Large Flat steel ingot.
Background technology
As continuous casting technology is in the extensive use of large iron and steel enterprise, small-sized steel ingot is more and more replaced by continuous casting billet
Generation, static ingot ingot shape specification also develops towards big specification direction, and data display more than 50t large steel ingot contract ratios in 2015 are
18.1%, and 50t in 2016 and above large steel ingot contract ratio have increased to 28.4%；With the continuous increase of steel ingot specification, steel
The Surface Crack Problems of ingot are more prominent, as shown in Figure 1.
Find out that ingot shape is bigger from Fig. 1 data, the tendency cracked is bigger, in ingot solidification cooling procedure, inside and outside temperature
Difference is larger, and produced structural stress and thermal stress is also bigger；The static pressure of molten steel is also bigger in casting process simultaneously, easier
Produce surface of steel ingot lobe；Especially 50t, 53t cast slab surface of steel ingot cracking breakout is up to more than 8%.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of good 50t of Ingot Surface Quality and with higher level's Large Flat steel ingot
Die casting method.
In order to solve the above technical problems, the technical solution used in the present invention is：During the molding, the cast of molten steel
The degree of superheat is 32~36 DEG C, and the steel ingot ingot body duration of pouring is 23~28min, and the ingot head opening duration of pouring is 7~9min；Pour
Finish 30~60mim, ingot mould cap mouthful capping stay-warm case.
In casting process of the present invention, sprue gate aperture is 45mm.
It is of the present invention be poured after, surface of steel ingot temperature drops to 500~650 DEG C of demouldings.Band steel after the demoulding
Ingot stacking slow cooling to surface temperature drops to 300~450 DEG C.
It is using the beneficial effect produced by above-mentioned technical proposal：The present invention is easy to operation, can improve steel ingot
Internal soundness, reduces the defects such as the loose, shrinkage cavity of ingot head, can also prevent surface of steel ingot crackle, reduces molding 50t and with higher level
Waste product of the large-scale cast slab caused by crack defect is outside the plan.The present invention is using compared with low overheat, slower poring rate, steel ingot
30~60min caps mouthful capping stay-warm case, longer demoulding time and stacking slow cooling time, reach good inside after being poured
Quality and surface effect.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 is different ingot shape surface of steel ingot cracking frequency schematic diagrames in common process.
Embodiment
This 50t and with the die casting method of higher level's Large Flat steel ingot use following techniques：（1）During the molding, according to
Different steel grades, the cast degree of superheat of molten steel is selected in the range of 32~36 DEG C, the steel alloy series selection upper limit, low-alloy, middle carbon
Steel, straight carbon steel series selection lower limit；The steel ingot ingot body duration of pouring be 23~28min, the ingot head opening duration of pouring be 7~
9min；Ingot body steadily rises, and stream is no longer moved except being vomitted on molten steel in casting process.It is favourable compared with low overheat and slower poring rate
In the shortening molten steel solidification time, reduce field trash segregation, increase green shell（Chill）Thickness, field trash segregation is more at least in steel ingot
Portion's quality is better, and chill is thicker more favourable to reducing surface of steel ingot crackle.
（2）30~60min is poured, ingot mould cap mouthful capping stay-warm case, to improve insulating effect of steel ingot cap opening, mitigates
Ingot head is loose, lifts steel ingot internal soundness.
（3）In the casting process, sprue gate aperture is 45mm.The 45mm apertures mouth of a river is easier to protect in casting process
Casting manifold state and control poring rate are held, secondary oxidation of steel is reduced and reduces surface of steel ingot crackle, and operate easier.
（4）It is described be poured after, surface of steel ingot temperature drops to 500~650 DEG C of demouldings, about 24 hours and more than；The demoulding
Cast slab stacking slow cooling to surface temperature afterwards drop to 300~450 DEG C, about 24 hours and more than.Surface of steel ingot temperature after stacking
If higher, tear open and easily cracked after chopping, it is unfavorable to steel ingot internal soundness.
Embodiment 1：This molding 50t and with the production method of higher level's cast slab use following concrete technologies.
60t Q235B steel is molded, bull ladle temperature is+33 DEG C of liquidus curve；Sprue gate aperture is 45mm, and the duration of pouring is：
Ingot body 25 minutes, cap mouthful 7 minutes；Ingot steel casting, which is finished, is capped stay-warm case after 30min；Surface of steel ingot temperature drops to 550 DEG C of demouldings；
Stacking slow cooling to surface of steel ingot temperature drops to 350 DEG C.Cast slab surface of steel ingot flawless after stacking slow cooling.
Embodiment 2：This molding 50t and with the production method of higher level's cast slab use following concrete technologies.
53t S355J2+N steel is molded, bull ladle temperature is+33 DEG C of liquidus curve；Sprue gate aperture is 45mm, the duration of pouring
For：Ingot body 26 minutes, cap mouthful 8 minutes；Ingot steel casting, which is finished, is capped stay-warm case after 30min；Surface of steel ingot temperature drops to 500 DEG C and taken off
Mould；Stacking slow cooling to surface of steel ingot temperature drops to 300 DEG C.Cast slab surface of steel ingot flawless after stacking slow cooling.
Embodiment 3：This molding 50t and with the production method of higher level's cast slab use following concrete technologies.
51t 12Cr2Mo1VR steel is molded, bull ladle temperature is+36 DEG C of liquidus curve；Sprue gate aperture is 45mm, during cast
Between be：Ingot body 28 minutes, cap mouthful 9 minutes；Ingot steel casting, which is finished, is capped stay-warm case after 60min；Surface of steel ingot temperature drops to 650 DEG C
The demoulding；Stacking slow cooling to surface of steel ingot temperature drops to 400 DEG C.Cast slab surface of steel ingot flawless after stacking slow cooling.
Embodiment 4：This molding 50t and with the production method of higher level's cast slab use following concrete technologies.
58t 35# steel is molded, bull ladle temperature is+32 DEG C of liquidus curve；Sprue gate aperture is 45mm, and the duration of pouring is：Ingot
Body 23 minutes, cap mouthful 8 minutes；Ingot steel casting, which is finished, is capped stay-warm case after 45min；Surface of steel ingot temperature drops to 600 DEG C of demouldings；Heap
Pile slow cooling to surface of steel ingot temperature drops to 450 DEG C.Cast slab surface of steel ingot flawless after stacking slow cooling.
Implementation result：Hebei steel mill use this die casting method after, 50t and with higher level's surface of steel ingot cracking breakout by original
8.2% be reduced to 1.3%, annual accumulative minimizing surface 1452t outside the plan, save about 2,200,000 yuan of mass loss.
Claims (4)
1. a kind of 50t and the die casting method with higher level's Large Flat steel ingot, it is characterised in that：During the molding, molten steel is poured
It is 32~36 DEG C to note the degree of superheat, and the steel ingot ingot body duration of pouring is 23~28min, and the ingot head opening duration of pouring is 7~9min；Cast
Finish 30~60mim, ingot mould cap mouthful capping stay-warm case.
2. 50t according to claim 1 and the die casting method with higher level's Large Flat steel ingot, it is characterised in that：The cast
During, sprue gate aperture is 45mm.
3. 50t according to claim 1 or 2 and the die casting method with higher level's Large Flat steel ingot, it is characterised in that：It is described to pour
After note is finished, surface of steel ingot temperature drops to 500~650 DEG C of demouldings.
4. 50t according to claim 3 and the die casting method with higher level's Large Flat steel ingot, it is characterised in that：The demoulding
Cast slab stacking slow cooling to surface temperature afterwards drops to 300~450 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710369682.7A CN107262685A (en) | 2017-05-23 | 2017-05-23 | 50t is with the die casting method of higher level's Large Flat steel ingot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710369682.7A CN107262685A (en) | 2017-05-23 | 2017-05-23 | 50t is with the die casting method of higher level's Large Flat steel ingot |
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| CN107262685A true CN107262685A (en) | 2017-10-20 |
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| CN201710369682.7A Pending CN107262685A (en) | 2017-05-23 | 2017-05-23 | 50t is with the die casting method of higher level's Large Flat steel ingot |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108580815A (en) * | 2018-05-30 | 2018-09-28 | 舞阳钢铁有限责任公司 | A kind of production method of the big substance super-thick steel plates of 12Cr2Mo1R |
| CN108655351A (en) * | 2018-05-30 | 2018-10-16 | 舞阳钢铁有限责任公司 | Hydrogenation reactor steel 12Cr2Mo1R (H) ingot steel casting method |
| CN110090933A (en) * | 2019-03-29 | 2019-08-06 | 石钢京诚装备技术有限公司 | A kind of pouring technology of low segregation plastic die steel |
| CN110496946A (en) * | 2019-08-20 | 2019-11-26 | 舞阳钢铁有限责任公司 | Bet method is poured the die casting method of 80t grades of large-sized forging ingots |
| CN114273643A (en) * | 2021-12-16 | 2022-04-05 | 舞阳钢铁有限责任公司 | Method for improving percent of pass of large single-weight high-alloy electroslag ingot |
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| JPS63180362A (en) * | 1987-01-23 | 1988-07-25 | Kawasaki Steel Corp | Method and apparatus for producing steel ingot |
| CN101869968A (en) * | 2010-06-01 | 2010-10-27 | 山西太钢不锈钢股份有限公司 | Method for casting thirty-tonnage stainless steel ingot |
| CN102166632A (en) * | 2011-04-29 | 2011-08-31 | 中国第一重型机械股份公司 | Casting method of large-scale steel ingot |
| CN102409238A (en) * | 2011-06-28 | 2012-04-11 | 南阳汉冶特钢有限公司 | 42CrMo alloy constructional steel super-thick plate and production method thereof |
| CN103031495A (en) * | 2011-10-08 | 2013-04-10 | 山西太钢不锈钢股份有限公司 | Mold casting method for hollow axle steel of high-speed passenger train |
| CN105855485A (en) * | 2016-05-31 | 2016-08-17 | 舞阳钢铁有限责任公司 | Die casting method for medium carbon steel large ingot slab |
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| JPS63180362A (en) * | 1987-01-23 | 1988-07-25 | Kawasaki Steel Corp | Method and apparatus for producing steel ingot |
| CN101869968A (en) * | 2010-06-01 | 2010-10-27 | 山西太钢不锈钢股份有限公司 | Method for casting thirty-tonnage stainless steel ingot |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108580815A (en) * | 2018-05-30 | 2018-09-28 | 舞阳钢铁有限责任公司 | A kind of production method of the big substance super-thick steel plates of 12Cr2Mo1R |
| CN108655351A (en) * | 2018-05-30 | 2018-10-16 | 舞阳钢铁有限责任公司 | Hydrogenation reactor steel 12Cr2Mo1R (H) ingot steel casting method |
| CN108655351B (en) * | 2018-05-30 | 2020-09-11 | 舞阳钢铁有限责任公司 | Steel ingot casting method of steel 12Cr2Mo1R (H) for hydrogenation reactor |
| CN110090933A (en) * | 2019-03-29 | 2019-08-06 | 石钢京诚装备技术有限公司 | A kind of pouring technology of low segregation plastic die steel |
| CN110090933B (en) * | 2019-03-29 | 2021-10-08 | 石钢京诚装备技术有限公司 | Pouring process of low segregation plastic die steel |
| CN110496946A (en) * | 2019-08-20 | 2019-11-26 | 舞阳钢铁有限责任公司 | Bet method is poured the die casting method of 80t grades of large-sized forging ingots |
| CN114273643A (en) * | 2021-12-16 | 2022-04-05 | 舞阳钢铁有限责任公司 | Method for improving percent of pass of large single-weight high-alloy electroslag ingot |
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Application publication date: 20171020 |
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