CN108950113A - A kind of casting and its processing method - Google Patents
A kind of casting and its processing method Download PDFInfo
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- CN108950113A CN108950113A CN201810953321.1A CN201810953321A CN108950113A CN 108950113 A CN108950113 A CN 108950113A CN 201810953321 A CN201810953321 A CN 201810953321A CN 108950113 A CN108950113 A CN 108950113A
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- 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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/008—Composition or distribution of the charge
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a kind of casting and its processing methods, belong to casting field.Processing method includes the following steps: iron ore, sinter and lime stone are that 15-20:10-12:10-14 is mixed with weight ratio, it is heated in blast furnace, it is then transferred to the molten iron after refining is refined in oxygen coverter, the ladle of molten steel equipped with refining and after being vacuum-treated is transported to bale panoramic tables, bale panoramic tables are rotated to pouring position, molten steel and molten iron are injected into tundish simultaneously and mixed, each crystallizer, which will be assigned to, by the mouth of a river of tundish is poured casting formwork, obtain cast, cast is successively subjected to straightening, it is cooling, vibratory decladding, sandblasted finish, obtain casting.The processing method is simple, easy to operate, and poring rate is very fast, and the period is shorter.The casting structure obtained by this method is fine and close, smooth surface, and free from flaw is high-quality.
Description
Technical field
The present invention relates to casting fields, and in particular to a kind of casting and its processing method.
Background technique
It is cast into a kind of metal heat processing technique, is that liquid metals is cast to the casting cavity being adapted with part shape
In, the method after its cooled and solidified, to obtain part or blank.
Wherein, casting has obvious influence to the structure of casting and performance as important link.But current founder
In skill, the speed of casting is slower, causes casting cycle whole longer, and due to link condition each in casting process control compared with
The yield and quality of pine, casting cannot improve.
Therefore, the processing technology of casting need to be improved.
Summary of the invention
The purpose of the present invention is to provide a kind of processing methods of casting, and the processing method is simple, easy to operate, processing conditions
Preferably, poring rate is very fast, and the period is shorter.
The second object of the present invention is to provide one kind casting as obtained by the processing of above-mentioned processing method, resulting casting knot
Structure is fine and close, smooth surface, and free from flaw is high-quality.
The present invention solves its technical problem and adopts the following technical solutions to realize:
The processing method that the present invention proposes a kind of casting includes the following steps: iron ore, sinter and lime stone with weight
Amount is heated in blast furnace than being that 15-20:10-12:10-14 is mixed, and is then transferred in oxygen coverter after refining refined
The ladle of molten steel equipped with refining and after being vacuum-treated is transported to bale panoramic tables by molten iron, and rotation bale panoramic tables are to being poured position
It sets, molten steel and molten iron are injected into tundish simultaneously and mixes, each crystallizer will be assigned to by the mouth of a river of tundish and be poured
Casting formwork, obtains cast, and cast is successively carried out straightening, cooling, vibratory decladding, sandblasted finish, obtains casting.
Preferably, molten iron is that 30-40:100 is mixed with the weight ratio of molten steel.
The present invention also proposes a kind of casting, is processed by above-mentioned processing method and is obtained.
The casting of present pre-ferred embodiments offer and its beneficial effect of processing method include:
Present pre-ferred embodiments provide casting work method it is simple, easy to operate, processing conditions is preferable, poring rate compared with
Fastly, the period is shorter.The casting as obtained by the processing of above-mentioned processing method, resulting casting structure is fine and close, smooth surface, and nothing is split
Seam, it is high-quality.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
The casting of the embodiment of the present invention and its processing method are specifically described below.
The processing method of casting provided by the embodiment of the present invention, mainly include the following steps: by iron ore, sinter and
Lime stone is 15-20:10-12:10-14 mixing with weight ratio, heats in blast furnace, is then transferred in oxygen coverter and refines
Molten iron after to refining.
Above-mentioned three kinds of molten iron raw material sources are wider, are easy to get, and cost is relatively low.Sinter and lime stone are conducive to make up mostly
The number lower defects of iron ore grade, and sinter can sufficiently melt in converter steelmaking process, at the same substantially not with its
Its chemical component reacts.
When lime stone is refined in converter, calcium salt can be generated and release carbon dioxide, bubble can be formed in molten iron
And there is certain rate of climb, to play certain stirring action to the mixing of molten iron, improve the stream of molten iron inside converter
Dynamic property adjusts the uniformity coefficient of each ingredient mixing in iron ore, sinter and lime stone to play in molten iron system
Effect.
The ladle of molten steel equipped with refining and after being vacuum-treated is transported to bale panoramic tables, rotation bale panoramic tables are extremely poured
Molten steel and molten iron are injected tundish simultaneously and mixed, will be assigned to each crystallizer by the mouth of a river of tundish and pour by position
Casting formwork is infused, cast is obtained.
Optionally, the weight ratio of molten iron and mixing of molten steel such as can be 30-40:100.
Wherein, the diameter of bale panoramic tables is preferably controlled in 50-60mm, by the way that the bale panoramic tables of above-mentioned diameter are arranged,
It can effectively solve in the prior art in steel ladle pouring to the middle and later periods because liquid level reduces, ferrostatic pressure reduces, middle packet is not
The case where full liquid level of energy is poured.
Accordingly, the diameter of the filling pipe end of tundish and collector nozzle is preferably controlled respectively in 18-25mm and 16-22mm, on
Steel transportation amount can be effectively improved by stating the tundish under diameter range, meet steel transportation amount demand when pulling rate is promoted to 3.0m/min.
By the way that tundish is arranged, the molten steel stored in tundish can be made to play the role of certain linking when changing and containing molten steel.
It is worth noting that impact force is larger since the height of liquid level inside container for holding molten steel and molten iron is higher, become in casting process
Change amplitude is also very big, and the liquid level of the tundish of the filling pipe end and collector nozzle with above-mentioned diameter is arranged more compared with said vesse
Low, amplitude of variation is also much smaller, so as to stablize casting, reduces steel stream or flowing molten iron washes away crystallizer solidified shell.
In addition, molten steel and molten iron that the tundish of filling pipe end and collector nozzle that above-mentioned diameter is arranged can make it internal have
Appropriate power can be projected in collector nozzle in small-scale spray pattern, more flowability can not only in casting process
Dead zone is enough reduced, and molten steel and molten iron can also be increased under same pouring condition to the casting area of casting formwork, is improved
It is poured effect.
In some preferred embodiments, the diameter of bale panoramic tables for example can be 52-58mm, the upper water of tundish
The diameter of mouth and collector nozzle for example can be 20-22mm and 18-21mm.
In some preferred embodiments, the diameter of bale panoramic tables for example can be 55mm, the upper water of tundish
The diameter of mouth and collector nozzle for example can be 22mm and 20.5mm.
Bale panoramic tables or tundish can make to be poured better effect in above-mentioned preferred or preferred diameter range.
In some embodiments, the flow of the mixed liquor of molten steel and molten iron in a crystallizer is 140-150m3/ h, such as
140m3/h、141m3/h、149m3/ h or 150m3/h。
In some preferred embodiments, the flow of the mixed liquor of molten steel and molten iron in a crystallizer is 142-148m3/
H, such as 142m3/h、143m3/h、147m3/ h or 148m3/h。
In some preferred embodiments, the flow of the mixed liquor of molten steel and molten iron in a crystallizer is 144-
146m3/ h, such as 144m3/h、145m3/ h or 146m3/h。
By the above scheme in the application, by the flow of the mixed liquor of molten steel and molten iron in a crystallizer compared with the prior art
It improves, molten steel and molten iron can be improved in the casting uniformity on casting formwork surface, keep its institutional framework even closer, Mei Gewei
The thickness and surface condition set are more consistent.
It is worth noting that the flow of the mixed liquor of molten steel and molten iron in a crystallizer cannot be improved excessively, otherwise flowing
Measure it is biggish under the conditions of, the energy of potting syrup is higher, and in casting process, the impact of the potting syrup that is poured afterwards was previously poured in being poured
The surface of the casting formwork of fluid injection is easy breakdown or the broken established pouring layer of casting formwork.
In some embodiments, for the initial solidification shell in crystallizer with a thickness of 8-12mm, which can be upper
It states and obtains under conditions of the flow of the mixed liquor of molten steel and molten iron in a crystallizer.
Initial solidification shell under above range thickness has good heat-transfer effect, and heat transfer rate is fast and uniform, and stress is smaller,
To be conducive to avoid the surface of casting to crack.
In some embodiments, in crystallizer covering slag slag blanket with a thickness of 20-40mm.In some preferred embodiment party
In formula, the slag blanket number of covering slag is 3 layers, and the thickness of the slag blanket of the bottom is not less than 5mm.
The setting of above-mentioned slag blanket is able to maintain uniform melt of the covering slag in crystallizer, keeps liquid slag layer relatively stable, together
When can maintain certain slag layer, to play the role of adiabatic heat-insulation.
It is worth noting that the thickness of covering slag slag blanket is unsuitable blocked up also unsuitable excessively thin, it is excessively thin to be easy in covering slag slag blanket
It causes after contacting with the air partially solidified, occurs conglomeration in crystallizer, the top of the slag is caused to deteriorate, bits performance is unfavorable to stablizing.
In addition, the excessively thin thermal insulation property for also resulting in bits of slag blanket reduces, a large amount of heat loss are caused, molten steel face is caused to tie the unfavorable of cold shell
Phenomenon.
Correspondingly, blocked up not only will affect of slag blanket is appropriately determined steel, iron liquid face, but also it may also result in bits consumption
Unevenly there are surface quality problems.
It preferably, further include preheating casting formwork to 800-850 DEG C, to avoid casting formwork and potting syrup before casting
Between excessive temperature differentials, make just contact casting formwork potting syrup in casting formwork surface forming part crackle, in addition constantly casting
Potting syrup, remain in above-mentioned crackle in casting structure tissue, reduce the quality and service life of casting.
Further, cast is successively subjected to straightening, cooling, vibratory decladding, sandblasted finish, obtains casting.
In some embodiments, straightening can carry out under conditions of 1010-1050 DEG C.By in above-mentioned temperature range
Straightening, can further be conducive to that slab be avoided to generate severe internal crackle and shrinkage cavity defect.
It can refer to ground, cooling includes cooling for the first time and second cooling.Cooling for the first time is by pouring piece in 600-700
Cool down under conditions of DEG C.Second of cooling is that cast after cooling for the first time cools down under conditions of 100-200 DEG C.Pass through
It cools down twice, temperature can be made to reduce under preferable cooling gradient, cause surface to be received under the instantaneous cooling temperature difference to avoid casting
, there is wrinkle or crackle in contracting.
In some preferred embodiments, cooling for the first time and second of cooling is to the lazy of cast injection circulation
Property gas to play the role of cooling, inert gas will not react in temperature-fall period with casting, to the structure of casting and
Performance does not generate adverse effect.In addition, cooled down in the form of the gas for spraying circulation, it can be in a short time by gas
Take away the heat of casting.Also, the mobility of gas is larger, and more uniform cooling can be played to each position of casting and is made
With.
In some embodiments, the flow of above-mentioned inert gas can be for example 14-18cc/s, such as 14cc/s, 15cc/
S, 16cc/s, 17cc/s or 18cc/s.
It can refer to, periodically or periodically the instrument of injection inert gas is cleared up and replaced, to avoid dust
Or impurity blocking spout influences cooling effect.
From the above, the processing method for the casting that application scheme provides is simple, and easy to operate, poring rate is very fast, the period
It is shorter, the production cycle of 6-8% can be shortened compared with the prior art.The casting structure obtained by this method is fine and close, smooth surface,
Free from flaw, it is high-quality.
Feature and performance of the invention are described in further detail with reference to embodiments.
Embodiment 1
Iron ore, sinter and lime stone are mixed with weight ratio for 15:10:10, heats, is then transferred in blast furnace
Molten iron after refining is refined in oxygen coverter.
It is 50mm bale panoramic tables that the ladle of molten steel equipped with refining and after being vacuum-treated, which is transported to diameter, and rotation is wrapped back greatly
Molten steel and molten iron such as can be injected tundish simultaneously for 30:100 with weight ratio and mixed by turntable to pouring position.In
Between the diameter of filling pipe end and collector nozzle that wraps be respectively 18mm and 16mm.Before casting, casting formwork is preheated to 800 DEG C, is then led to
The mouth of a river for crossing tundish will be assigned to each crystallizer casting casting formwork, obtain cast.
Wherein, the flow of the mixed liquor of molten steel and molten iron in a crystallizer is 140m3/h.Initial solidification shell in crystallizer is thick
Degree is 8mm.Covering slag slag blanket with a thickness of 20mm in crystallizer.
Cast is subjected to straightening under conditions of 1010 DEG C, is then cooled down for the first time under conditions of 600 DEG C, in 100
Second of cooling under conditions of DEG C, cooling for the first time and second of cooling are to spray for 14cc/s cast to circulate with flow
Inert gas.
Then, cast after cooling is successively subjected to vibratory decladding, sandblasted finish, obtains casting.
Embodiment 2
Iron ore, sinter and lime stone are mixed with weight ratio for 20:12:14, heats, is then transferred in blast furnace
Molten iron after refining is refined in oxygen coverter.
It is 60mm bale panoramic tables that the ladle of molten steel equipped with refining and after being vacuum-treated, which is transported to diameter, and rotation is wrapped back greatly
Molten steel and molten iron such as can be injected tundish simultaneously for 40:100 with weight ratio and mixed by turntable to pouring position.In
Between the diameter of filling pipe end and collector nozzle that wraps be respectively 25mm and 22mm.Before casting, casting formwork is preheated to 850 DEG C, is then led to
The mouth of a river for crossing tundish will be assigned to each crystallizer casting casting formwork, obtain cast.
Wherein, the flow of the mixed liquor of molten steel and molten iron in a crystallizer is 150m3/h.Initial solidification shell in crystallizer is thick
Degree is 12mm.Covering slag slag blanket is 3 layers with a thickness of the slag blanket number of 40mm and covering slag in crystallizer, the thickness of the slag blanket of the bottom
Degree is 5mm.
Cast is subjected to straightening under conditions of 1050 DEG C, is then cooled down for the first time under conditions of 700 DEG C, in 200
Second of cooling under conditions of DEG C, cooling for the first time and second of cooling are to spray for 18cc/s cast to circulate with flow
Inert gas.
Then, cast after cooling is successively subjected to vibratory decladding, sandblasted finish, obtains casting.
Embodiment 3
Iron ore, sinter and lime stone are mixed with weight ratio for 17.5:11:12, heats in blast furnace, then shifts
Molten iron after refining is refined into oxygen coverter.
It is 55mm bale panoramic tables that the ladle of molten steel equipped with refining and after being vacuum-treated, which is transported to diameter, and rotation is wrapped back greatly
Molten steel and molten iron such as can be injected tundish simultaneously for 35:100 with weight ratio and mixed by turntable to pouring position.In
Between the diameter of filling pipe end and collector nozzle that wraps be respectively 22mm and 20.5mm.Before casting, casting formwork is preheated to 825 DEG C, then
Each crystallizer will be assigned to by the mouth of a river of tundish and is poured casting formwork, obtain cast.
Wherein, the flow of the mixed liquor of molten steel and molten iron in a crystallizer is 145m3/h.Initial solidification shell in crystallizer is thick
Degree is 10mm.Covering slag slag blanket is 3 layers with a thickness of the slag blanket number of 30mm and covering slag in crystallizer, the thickness of the slag blanket of the bottom
Degree is 8mm.
Cast is subjected to straightening under conditions of 1025 DEG C, is then cooled down for the first time under conditions of 650 DEG C, in 150
Second of cooling under conditions of DEG C, cooling for the first time and second of cooling are to spray for 16cc/s cast to circulate with flow
Inert gas.
Then, cast after cooling is successively subjected to vibratory decladding, sandblasted finish, obtains casting.
Embodiment 4
Iron ore, sinter and lime stone are mixed with weight ratio for 16:10.5:11, heats in blast furnace, then shifts
Molten iron after refining is refined into oxygen coverter.
It is 52mm bale panoramic tables that the ladle of molten steel equipped with refining and after being vacuum-treated, which is transported to diameter, and rotation is wrapped back greatly
Molten steel and molten iron such as can be injected tundish simultaneously for 32.5:100 with weight ratio and mixed by turntable to pouring position.
The filling pipe end of tundish and the diameter of collector nozzle are respectively 20mm and 18mm.Before casting, casting formwork is preheated to 810 DEG C, then
Each crystallizer will be assigned to by the mouth of a river of tundish and is poured casting formwork, obtain cast.
Wherein, the flow of the mixed liquor of molten steel and molten iron in a crystallizer is 144m3/h.Initial solidification shell in crystallizer is thick
Degree is 9mm.Covering slag slag blanket is 3 layers with a thickness of the slag blanket number of 22.5mm and covering slag in crystallizer, the slag blanket of the bottom
With a thickness of 6mm.
Cast is subjected to straightening under conditions of 1015 DEG C, is then cooled down for the first time under conditions of 625 DEG C, in 125
Second of cooling under conditions of DEG C, cooling for the first time and second of cooling are to spray for 15cc/s cast to circulate with flow
Inert gas.
Then, cast after cooling is successively subjected to vibratory decladding, sandblasted finish, obtains casting.
Embodiment 5
Iron ore, sinter and lime stone are mixed with weight ratio for 18:11.5:13, heats in blast furnace, then shifts
Molten iron after refining is refined into oxygen coverter.
It is 58mm bale panoramic tables that the ladle of molten steel equipped with refining and after being vacuum-treated, which is transported to diameter, and rotation is wrapped back greatly
Molten steel and molten iron such as can be injected tundish simultaneously for 37.5:100 with weight ratio and mixed by turntable to pouring position.
The filling pipe end of tundish and the diameter of collector nozzle are respectively 22mm and 21mm.Before casting, casting formwork is preheated to 840 DEG C, then
Each crystallizer will be assigned to by the mouth of a river of tundish and is poured casting formwork, obtain cast.
Wherein, the flow of the mixed liquor of molten steel and molten iron in a crystallizer is 146m3/h.Initial solidification shell in crystallizer is thick
Degree is 11mm.Covering slag slag blanket is 3 layers with a thickness of the slag blanket number of 27.5mm and covering slag in crystallizer, the slag blanket of the bottom
With a thickness of 10mm.
Cast is subjected to straightening under conditions of 1035 DEG C, is then cooled down for the first time under conditions of 675 DEG C, in 175
Second of cooling under conditions of DEG C, cooling for the first time and second of cooling are to spray for 17cc/s cast to circulate with flow
Inert gas.
Then, cast after cooling is successively subjected to vibratory decladding, sandblasted finish, obtains casting.
Test example 1
Embodiment 1-5 is repeated, enough casting are obtained.
The mechanical property of the resulting casting of embodiment 1-5 is measured, the results are shown in Table 1.
1 mechanical property of table
As can be seen from Table 1, the resulting casting of embodiment 1-5 all has good mechanical property, and wherein 3 institute of embodiment
The mechanical property of the casting obtained is best, and the processing method for illustrating embodiment 3 is more excellent in the above-described embodiments.
In addition, structure detection is carried out to the resulting casting of embodiment 1-5, the results show that resulting cast(ing) surface is flat
It is whole smooth, above-mentioned casting is splitted respectively, can be seen that the structure of above-mentioned casting is very fine and close according to the section for splitting mouth, and nothing is split
Seam exists.
Test example 2
By taking embodiment 3 as an example, control group 1-7 is set, and control group 1 and the difference of embodiment 3 are the straight of bale panoramic tables
Diameter is 40mm；The difference of control group 2 and embodiment 3 is that the diameter of the filling pipe end of tundish is 15mm, and the diameter of collector nozzle is
12；The difference of control group 3 and embodiment 3 is that the diameter of the filling pipe end of tundish is 30mm, and the diameter of collector nozzle is 25；Control
Group 4 and the difference of embodiment 3 are that the flow of the mixed liquor of molten steel and molten iron in a crystallizer is 160m3/h；Control group 5 and reality
Apply example 3 difference be covering slag slag blanket with a thickness of 10mm；The difference of control group 6 and embodiment 3 is covering slag slag blanket
With a thickness of 50mm；The difference of control group 7 and embodiment 3 is to be cooled to disposably to be cooled to required temperature and process does not spray nothing
Inert gas.
According to the mensuration mode of test example 1, the mechanical property of the resulting casting of control group 1-7, result such as 2 institute of table are measured
Show.
2 mechanical property of table
As can be seen from Table 2, the resulting casting of control group 1-7 is worse in terms of mechanical property compared with the casting of embodiment 3,
Illustrate that the processing method of casting provided by the embodiment of the present application can effectively improve and improve the performance of casting.
In addition, structure detection is carried out to the resulting casting of control group 1-7, the results show that resulting cast(ing) surface is relatively flat
It is whole smooth, above-mentioned casting is splitted respectively, can be seen that the structural compactness of above-mentioned casting compared with embodiment 3 according to the section for splitting mouth
Clearly worse, the cast-internal of especially control group 4-7 all has different size of hole and there are cracks.Illustrate the application reality
The processing method for applying casting provided by example can effectively improve casting product quality.
In conclusion the processing method of casting provided in an embodiment of the present invention is simple, easy to operate, poring rate is very fast, week
Phase is shorter, can shorten the production cycle of 6-8% compared with the prior art.The casting structure obtained by this method is fine and close, surfacing light
Sliding, free from flaw is high-quality.
Embodiments described above is a part of the embodiment of the present invention, instead of all the embodiments.Reality of the invention
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
Claims (10)
1. a kind of processing method of casting, which comprises the steps of: by iron ore, sinter and lime stone with weight
Amount is heated in blast furnace than being that 15-20:10-12:10-14 is mixed, and is then transferred in oxygen coverter after refining refined
The ladle of molten steel equipped with refining and after being vacuum-treated is transported to bale panoramic tables by molten iron, rotates the bale panoramic tables to pouring
Position is infused, molten steel and the molten iron are injected into tundish simultaneously and is mixed, each knot will be assigned to by the mouth of a river of tundish
Brilliant device is poured casting formwork, obtains cast, the cast is successively carried out straightening, cooling, vibratory decladding, sandblasted finish, is obtained
Casting；
Preferably, the molten iron is that 30-40:100 is mixed with the weight ratio of the molten steel.
2. processing method according to claim 1, which is characterized in that the diameter of the bale panoramic tables is 50-60mm, institute
The diameter of the filling pipe end and collector nozzle of stating tundish is respectively 18-25mm and 16-22mm.
3. processing method according to claim 1, which is characterized in that the mixed liquor of the molten steel and the molten iron is described
Flow in crystallizer is 140-150m3/h。
4. processing method according to claim 1, which is characterized in that the initial solidification shell in the crystallizer is with a thickness of 8-
12mm。
5. processing method according to claim 1, which is characterized in that in the crystallizer covering slag slag blanket with a thickness of
20-40mm；
Preferably, the slag blanket number of the covering slag is 3 layers, and the thickness of the slag blanket of the bottom is not less than 5mm.
6. processing method according to claim 1, which is characterized in that further include preheating the casting formwork before casting
To 800-850 DEG C.
7. processing method according to claim 1, which is characterized in that straightening is carried out under conditions of 1010-1050 DEG C.
8. processing method according to claim 1, which is characterized in that cooling includes cooling for the first time and second is cooling,
Cooling for the first time is that the pouring piece cools down under conditions of 600-700 DEG C, and second of cooling is will be after cooling for the first time
The cast cools down under conditions of 100-200 DEG C.
9. processing method according to claim 8, which is characterized in that cooling for the first time and second of cooling is to described
For the inert gas of cast injection circulation to play the role of cooling, the flow of the inert gas is 14-18cc/s.
10. a kind of casting, which is characterized in that the casting by the processing of such as claim 1-9 described in any item processing methods and
?.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810953321.1A CN108950113A (en) | 2018-08-21 | 2018-08-21 | A kind of casting and its processing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810953321.1A CN108950113A (en) | 2018-08-21 | 2018-08-21 | A kind of casting and its processing method |
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| CN108950113A true CN108950113A (en) | 2018-12-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109940141A (en) * | 2019-04-25 | 2019-06-28 | 芜湖新兴铸管有限责任公司 | Square blank crystallizer on-line tuning technique |
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2018
- 2018-08-21 CN CN201810953321.1A patent/CN108950113A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109940141A (en) * | 2019-04-25 | 2019-06-28 | 芜湖新兴铸管有限责任公司 | Square blank crystallizer on-line tuning technique |
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Application publication date: 20181207 |