CN106180598A - The control nitrogen pouring procedure of a kind of nitrogenous steel ingot and running gate system - Google Patents
The control nitrogen pouring procedure of a kind of nitrogenous steel ingot and running gate system Download PDFInfo
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- CN106180598A CN106180598A CN201610565786.0A CN201610565786A CN106180598A CN 106180598 A CN106180598 A CN 106180598A CN 201610565786 A CN201610565786 A CN 201610565786A CN 106180598 A CN106180598 A CN 106180598A
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- nitrogen
- tundish
- vacuum tank
- ingot
- vacuum
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
- B22D1/002—Treatment with gases
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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
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- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The present invention relates to control nitrogen pouring procedure and the running gate system of a kind of nitrogenous steel ingot, described method includes: ingot mould is put into vacuum chamber, is filled with nitrogen after evacuation, makes described vacuum chamber internal and external pressure balance；Molten steel is poured in described ingot mould under nitrogen protection atmosphere, solidification cooling, forms steel ingot；Described running gate system includes vacuum tank (6), be positioned in described vacuum tank (6) ingot mould (4) and be placed in the tundish (2) of described vacuum tank (6) top；The tapping hole of described tundish (2) connects with the steel mouth that waters of described ingot mould (4)；Described tundish core bar (9) upper end connects nitrogen cylinder (12)；Described vacuum tank (6) connects vacuum system and nitrogen bus system (5).The method and system can not only ensure that in molten steel, [N] constituent content reaches specification requirement in casting process, can remove [H] element and [O] element in molten steel simultaneously.
Description
Technical field
The present invention relates to Casting Technology field, particularly relate to control nitrogen pouring procedure and the cast system of a kind of nitrogenous steel ingot
System.
Background technology
Large-scale steel ingot pouring procedure is broadly divided into vacuum pouring and air cast at present.Wherein vacuum pouring is at vacuum chamber
Inside complete cast, keep molten steel surrounding enviroment to have certain vacuum such that it is able to preferably [H] element, [O] in removing molten steel
Element and [N] element；Air cast is then to carry out in an atmosphere, and cast stream typically carries out gas shield, the method removing steel
In [H] element, [O] element and [N] element effect general, even molten steel can be caused to inhale [H] element and [O] due to misoperation
Element.
Before pouring molten steel, first pass through chemical composition in refining controlling molten steel, respectively to [C], [Mn], [Cr], [Ni],
[Mo], [H], [O], [N] element mass fraction are controlled, and after smelting molten steel terminates, steel necessarily occur in transport and casting process
In water, [H] element, [O] element and [N] constituent content increase；Use above-mentioned vacuum casting method, it is possible to preferably remove molten steel
In [H] element, [O] element and [N] element, use above-mentioned air pouring procedure, [H] element and [O] in the most difficult control molten steel
Element.But for manufacturing low [H] element, low [O] element and the steel ingot of high [N] constituent content, such as ultra supercritical rotor steel
Ingot, above two method does not all reach requirement, the most inapplicable.
Summary of the invention
In view of above-mentioned analysis, it is desirable to provide the control nitrogen pouring procedure of a kind of nitrogenous steel ingot and running gate system, should
Method and system can not only ensure that in molten steel, [N] constituent content reaches specification requirement in casting process, can remove simultaneously
[H] element and [O] element in molten steel so that it is be maintained at a relatively low level.
The purpose of the present invention is mainly achieved through the following technical solutions: one aspect of the present invention provides a kind of nitrogenous steel ingot
Control nitrogen pouring procedure, including: first, ingot mould is put into vacuum chamber, after evacuation, is filled with nitrogen, make inside and outside described vacuum chamber
Pressure balance；Secondly, molten steel is poured in described ingot mould under nitrogen protection atmosphere, solidification cooling, forms steel ingot, complete
Cast.
Further, use tundish by pouring molten steel to described ingot mould, specifically include: first, ingot mould is put into
Vacuum chamber, is filled with nitrogen after evacuation, make described vacuum chamber internal and external pressure balance；Secondly, in tundish core bar, it is filled with nitrogen,
Then described vacuum chamber is entered by described tundish core bar lower end；Finally, the molten steel having been carried out chemical Composition Control is injected
Described tundish, promotes described tundish core bar, makes to be injected described steel ingot by described tundish under molten steel nitrogen carrier gas protective atmosphere
In mould, solidification cooling, form steel ingot, complete cast.
Further, being evacuated to vacuum described in is to be filled with nitrogen after below 150Pa.
Another aspect of the present invention also provides for the running gate system of a kind of control nitrogen pouring procedure for performing above-mentioned nitrogenous steel ingot,
Including: vacuum tank, the ingot mould being positioned in described vacuum tank and be placed in the tundish above described vacuum tank；Its
In, the tapping hole of described tundish connects with the steel mouth that waters of described ingot mould, it is ensured that molten steel is noted from the tapping hole of described tundish
Enter in ingot mould；Described tundish core bar upper end connect have nitrogen cylinder, it is ensured that molten steel under nitrogen protection atmosphere from tundish
Tapping hole injects in ingot mould；Described vacuum tank connects vacuum system and nitrogen bus system.
Further, between described vacuum tank and described tundish, it is provided with vacuum lid, tool in described vacuum cover body
Having the mozzle of up/down perforation, described mozzle upper end to connect with described tundish tapping hole, described mozzle lower end is with described
The steel mouth that waters of ingot mould connects.
Further, described vacuum tank is provided with Pressure gauge.
Further, it is provided with valve between described vacuum tank and described vacuum system, nitrogen bus system.
Further, described vacuum tank and described vacuum lid are provided with gas bleeder valve.
Further, described nitrogen bus system has nitrogen cylinder group and each nitrogen with described nitrogen cylinder group
The gas bus bar of bottle connection.
The present invention has the beneficial effect that:
Control nitrogen pouring procedure of the present invention and system, carry out nitrogen molding casting in vacuum tank, and nitrogen enters true
Expanding after slack tank makes molten steel be atomized, and can not only remove [H] element and [O] element in molten steel, simultaneously because protect gas at nitrogen
Pour into a mould under atmosphere, it is possible to ensure that in molten steel, [N] constituent content is constant, thus realize the steel ingot of low [H], low [O] and higher [N] content
Cast.
Other features and advantages of the present invention will illustrate in the following description, and, becoming from description of part
Obtain it is clear that or understand by implementing the present invention.The purpose of the present invention and other advantages can be by the explanations write
Structure specifically noted in book, claims and accompanying drawing realizes and obtains.
Accompanying drawing explanation
Accompanying drawing is only used for illustrating the purpose of specific embodiment, and is not considered as limitation of the present invention, at whole accompanying drawing
In, identical reference marks represents identical parts.
Fig. 1 is the present embodiment injection system structure schematic diagram；
Fig. 2 is Fig. 1 tundish structure schematic diagram；
Fig. 3 is vacuum lid structural representation in Fig. 1；
Fig. 4 is nitrogen bus system structural representation in Fig. 1；
Wherein, 1-molten steel, 2-tundish, 3-vacuum lid, 4-ingot mould, 5-nitrogen bus system, 6-vacuum tank,
7-vaccum exhaust outlet, 8-the first valve, 9-tundish core bar, 10-steam hose, 11-core bar hoisting mechanism, 12-nitrogen cylinder,
13-mozzle, 14-the first gas bleeder valve, 15-Pressure gauge, 16-the second gas bleeder valve, 17-air-filled pore, 18-nitrogen cylinder group, 19-second
Valve, 20-metal steam hose, 21-gas bus bar.
Detailed description of the invention
Specifically describing the preferred embodiments of the present invention below in conjunction with the accompanying drawings, wherein, accompanying drawing constitutes the application part, and
Together with embodiments of the present invention for explaining the principle of the present invention.
The present embodiment provides the control nitrogen running gate system of a kind of nitrogenous steel ingot, and described system structure is as it is shown in figure 1, include centre
Bag 2, vacuum lid 3, vacuum tank 6 and ingot mould 4, in wherein molten steel 1 is placed in tundish 2, ingot mould 4 is placed in vacuum tank 6
In, all use Flange joint between vacuum tank 6, vacuum lid 3 and tundish 2, rely on gravity to seal each other, formed and seal sky
Between.
Vaccum exhaust outlet 7 it is provided with, by the described external vacuum system of vaccum exhaust outlet 7 vacuum tank 6 on vacuum tank 6
System, vacuum system to vacuum tank 6 evacuation, makes the ingot mould in vacuum tank 6 be placed in certain true by vaccum exhaust outlet 7
In reciprocal of duty cycle environment；Link position at vaccum exhaust outlet 7 with vacuum tank 6 is provided with the first valve 8, described first valve 8
Open and close the connection being capable of being switched on or off vacuum system with vacuum tank 6.
Being provided with air-filled pore 17 on vacuum tank 6, air-filled pore 17 connects nitrogen bus system 5, nitrogen bus-bar system
System 5 can be filled with nitrogen by air-filled pore 17 in vacuum tank 6, so that the vacuum environment in vacuum tank 6 forms nitrogen
Atmosphere, thus ensure that molten steel is poured into a mould under nitrogen protection atmosphere, owing in the atmosphere in vacuum tank 6, nitrogen partial pressure is relatively big,
The dividing potential drop of oxygen and water is less, therefore when pouring molten steel, it is possible to effectively [H] element in removing molten steel and [O] element, simultaneously
Ensure that in molten steel, [N] constituent content is constant.
Pressure gauge 15 it is additionally provided with, the display that Pressure gauge 15 can quantify vacuum within vacuum tank 6 on vacuum tank 6
Degree, the show value becoming 15 according to pressure controls vacuum system to the vacuum pumping of vacuum tank 6 and nitrogen bus system 5
Vacuum tank 6 inflated with nitrogen is operated.The second gas bleeder valve 16 it is additionally provided with, for discharging the unnecessary of vacuum tank 6 on vacuum tank 6
Gas.The present embodiment is in order to ensure that molten steel can beneficially remove [H] element and [O] element in molten steel at casting process, simultaneously
The content that can keep [N] element does not changes, and being therefore evacuated to vacuum in vacuum tank 6 is below 150Pa, fills the most again
Enter nitrogen, make the internal and external pressure balance of vacuum tank 6.
Vacuum lid 3 is arranged between vacuum tank 6 and tundish 2 and plays connection vacuum tank 6 and the bridge of tundish 2
Effect, it is ensured that molten steel 1 is poured into during ingot mould 4 always nitrogen protection atmosphere from tundish 2, thus avoids molten steel 1
[H] element, [O] element and [N] element in air is absorbed in casting process.
Vacuum lid 3 structure is as it is shown on figure 3, be provided with mozzle 13 on vacuum lid 3, mozzle 13 is arranged on vacuum cover
In the middle of body 3, and up/down perforation connects the tapping of tundish 2 to the upper and lower surface of mozzle 13, the upper end open of mozzle 13
Mouthful, the lower ending opening correspondence ingot mould 4 of mozzle 13 water steel mouth, such molten steel 1 is directly over very from the tapping hole of tundish 2
Mozzle 13 on empty lid 3 is poured into ingot mould 4, it is ensured that molten steel 1 is from start to finish in the protective atmosphere of nitrogen.Vacuum cover
It is additionally provided with the first gas bleeder valve 14 on body 3, is used for discharging gas in vacuum lid 3.
Tundish 2 structure is as in figure 2 it is shown, have tundish core bar 9, and tundish core bar 9 can be inserted in described tapping hole,
When middle cored bar 9 injects in described tapping hole, it is possible to closed by tapping hole, molten steel is stoped to flow out, when middle cored bar 9 is taken out
When going out described tapping hole, molten steel flows out from tapping hole；Tundish 2 is additionally provided with core bar hoisting mechanism 11, core bar elevator
Structure 11 is connected with tundish core bar 9, controls tundish core bar 9 and lifts, thus controls opening and closing of tapping hole.Middle cored
Bar 9 is the rod-like structure with upper lower through-hole, and connecting in the upper end of tundish core bar 9 has steam hose 10, steam hose 10
The other end connects nitrogen cylinder 12, and nitrogen cylinder 12 provides nitrogen, enters tundish core bar 9 by steam hose 10, then from centre
Cored bar 9 enters the mozzle 13 of vacuum lid 3, finally enters in vacuum tank 6, so ensures the casting process that molten steel is whole
All in nitrogen protection atmosphere, the most beneficially in vacuum tank 6, keep stable nitrogen protection atmosphere.
The structure of nitrogen bus system 5 as shown in Figure 4, has nitrogen cylinder group 18 and gas bus bar 21, and gas converges
Stream comb 21 connects with each nitrogen cylinder of nitrogen cylinder group 18, and then gas bus bar passes through metal steam hose 20 and vacuum
Air-filled pore 17 on tank body 6 connects, and so can be filled with nitrogen in vacuum tank 6 by nitrogen bus system 5.At metal
Be provided with the second valve 19 on steam hose 20, by open or close the second valve 19 control nitrogen bus system 5 to
Inflated with nitrogen in vacuum tank 6.
When pouring into a mould, first tundish core bar 9 is inserted tundish tapping hole, make tapping hole close, then open
First valve 8, carries out evacuation by vacuum system to vacuum tank 6, the vacuum in showing vacuum tank 6 to Pressure gauge 15
Till reaching below 150Pa, it is then shut off the first valve 8, stops the vacuum pumping to vacuum tank 6；Open the second valve
19, utilize nitrogen bus system 5 to be filled with nitrogen in vacuum tank 6, be shown as 0 to Pressure gauge 15, i.e. inside and outside vacuum tank 6
Pressure balance, is then shut off the second valve 19, stops being filled with nitrogen in vacuum tank 6；Utilize nitrogen cylinder 12 to middle cored
Being filled with nitrogen in bar 9, then nitrogen is entered in vacuum tank 6 by mozzle 13；Then inject to tundish and changed
Learn Composition Control and chemical composition and met the molten steel 1 required, when molten steel 1 liquid level on tundish along 300-500mm
Time, utilize core bar hoisting mechanism 11 to promote tundish core bar 9, make tundish core bar 9 leave tapping hole, then molten steel 1 is from tapping
Mouth flows out, in mozzle 13 is cast in ingot mould 4, until pouring molten steel completes；Then tundish 2 and vacuum lid are hung away
3, molten steel natural coagulation cools down, and ultimately forms steel ingot.Due at molten steel all the time at nitrogen protection atmosphere under pour into a mould, can be the most de-
Except [H] element and [O] element in molten steel, [N] constituent content can be maintained again.
Embodiment 1:
First, according to injection system structure, as it is shown in figure 1, install each facility.Including tundish 2, vacuum lid 3, vacuum
Tank body 6 and ingot mould 4, in wherein molten steel 1 is placed in tundish 2, ingot mould 4 is placed in vacuum tank 6, vacuum tank 6, vacuum cover
All use Flange joint between body 3 and tundish 2, rely on gravity to seal each other, formed and seal space.
Second step, carries out Composition Control to cast molten steel, and pour steel does not adjust [N] constituent content in molten steel, cast
Molten steel final elemental gas content is as follows: [H]=0.00022%, [O]=0.0049%, [N]=0.0060%.
3rd step, opens the first valve 8, by vacuum system, vacuum tank 6 is carried out evacuation, and vacuum reaches
70Pa, closes the first valve 8；Open the second valve 19, utilize nitrogen bus system 5 to be filled with nitrogen in vacuum tank 6, extremely
Pressure gauge 15 is shown as 0, i.e. vacuum tank 6 internal and external pressure balance, is then shut off the second valve 19, stops in vacuum tank 6
It is filled with nitrogen.
4th step, utilizes nitrogen cylinder 12 to be filled with nitrogen in tundish core bar 9, and then nitrogen is entered very by mozzle 13
In slack tank body 6；Then carried out chemical Composition Control to tundish injection and chemical composition has met the molten steel required
1.When on molten steel 1 liquid level distance tundish along 300-500mm, core bar hoisting mechanism 11 is utilized to promote tundish core bar 9, in making
Between cored bar 9 leave tapping hole, then molten steel 1 flows out from tapping hole, in mozzle 13 is cast in ingot mould 4, until steel
Water casting complete.
After ingot solidification, steel ingot is carried out chemical composition detection, wherein [H]=0.0001%, [O]=0.0040%, [N]
=0.0112%.
Embodiment 2:
First, according to injection system structure, as it is shown in figure 1, install each facility.Including tundish 2, vacuum lid 3, vacuum
Tank body 6 and ingot mould 4, in wherein molten steel 1 is placed in tundish 2, ingot mould 4 is placed in vacuum tank 6, vacuum tank 6, vacuum cover
All use Flange joint between body 3 and tundish 2, rely on gravity to seal each other, formed and seal space.
Second step, carries out Composition Control to cast molten steel, and pour steel adjusts [N] constituent content in molten steel, pours into a mould steel
Water final elemental gas content is as follows: [H]=0.00016%, [O]=0.0042%, [N]=0.0347%.
3rd step, opens the first valve 8, by vacuum system, vacuum tank 6 is carried out evacuation, and vacuum reaches
150Pa, closes the first valve 8；Open the second valve 19, utilize nitrogen bus system 5 to be filled with nitrogen in vacuum tank 6,
It is shown as 0 to Pressure gauge 15, i.e. vacuum tank 6 internal and external pressure balance, is then shut off the second valve 19, stop to vacuum tank 6
Inside it is filled with nitrogen.
4th step, utilizes nitrogen cylinder 12 to be filled with nitrogen in tundish core bar 9, and then nitrogen is entered very by mozzle 13
In slack tank body 6；Then carried out chemical Composition Control to tundish injection and chemical composition has met the molten steel required
1.When on molten steel 1 liquid level distance tundish along 300-500mm, core bar hoisting mechanism 11 is utilized to promote tundish core bar 9, in making
Between cored bar 9 leave tapping hole, then molten steel 1 flows out from tapping hole, in mozzle 13 is cast in ingot mould 4, until steel
Water casting complete.
After ingot solidification, steel ingot is carried out chemical composition detection, wherein [H]=0.00012%, [O]=0.0030%,
[N]=0.0423%.
Embodiment 3:
During cast ultra supercritical rotor steel ingot, ultra supercritical rotor steel ingot requires that in molten steel, [H] constituent content is less than or equal to
0.00015%, [O] constituent content is less than or equal to 0.0030%, and [N] constituent content is 0.045-0.060%.
First, according to injection system structure, as it is shown in figure 1, install each facility.Including tundish 2, vacuum lid 3, vacuum
Tank body 6 and ingot mould 4, in wherein molten steel 1 is placed in tundish 2, ingot mould 4 is placed in vacuum tank 6, vacuum tank 6, vacuum cover
All use Flange joint between body 3 and tundish 2, rely on gravity to seal each other, formed and seal space.
Second step, carries out Composition Control to cast molten steel, and pour steel adjusts [N] constituent content in molten steel, pours into a mould steel
Water final elemental gas content is as follows: [H]=0.00015%, [O]=0.0028%, [N]=0.0470%.
3rd step, opens the first valve 8, by vacuum system, vacuum tank 6 is carried out evacuation, and vacuum reaches
100Pa, closes the first valve 8；Open the second valve 19, utilize nitrogen bus system 5 to be filled with nitrogen in vacuum tank 6,
It is shown as 0 to Pressure gauge 15, i.e. vacuum tank 6 internal and external pressure balance, is then shut off the second valve 19, stop to vacuum tank 6
Inside it is filled with nitrogen.
4th step, utilizes nitrogen cylinder 12 to be filled with nitrogen in tundish core bar 9, and nitrogen enters vacuum tank by mozzle 13
In body 6；Then carried out chemical Composition Control to tundish injection and chemical composition has met the molten steel 1 required.When
Time on molten steel 1 liquid level distance tundish along 300-500mm, utilize core bar hoisting mechanism 11 to promote tundish core bar 9, make tundish
Core bar 9 leaves tapping hole, and then molten steel 1 flows out from tapping hole, in mozzle 13 is cast in ingot mould 4, until molten steel waters
Note completes.
After ingot solidification, steel ingot is carried out chemical composition detection, wherein [H]=0.00013%, [O]=0.0023%,
[N]=0.0540%.
In sum, embodiments provide control nitrogen pouring procedure and the system of a kind of nitrogenous steel ingot, by ensureing
The nitrogen protection atmosphere that casting process is stable, [H] element and [O] element in effective removing molten steel, ensure in molten steel [N] simultaneously
Content keeps constant.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope that the invention discloses, the change that can readily occur in or replacement,
All should contain within protection scope of the present invention.
Claims (9)
1. the control nitrogen pouring procedure of a nitrogenous steel ingot, it is characterised in that including:
First, ingot mould is put into vacuum chamber, after evacuation, be filled with nitrogen, make described vacuum chamber internal and external pressure balance；
Secondly, molten steel is poured in described ingot mould under nitrogen protection atmosphere, solidification cooling, forms steel ingot.
The control nitrogen pouring procedure of the most nitrogenous steel ingot, it is characterised in that use tundish by pouring molten steel
To described ingot mould, specifically include:
First, ingot mould is put into vacuum chamber, after evacuation, be filled with nitrogen, make described vacuum chamber internal and external pressure balance；
Secondly, in tundish core bar, it is filled with nitrogen, is then entered described vacuum chamber by described tundish core bar lower end；
Finally, the molten steel having been carried out chemical Composition Control is injected described tundish, promotes described tundish core bar, make molten steel
Injected in described ingot mould by described tundish under nitrogen protection atmosphere, solidification cooling, form steel ingot, complete cast.
The control nitrogen pouring procedure of nitrogenous steel ingot the most according to claim 1 or claim 2, it is characterised in that described in be evacuated to vacuum
Degree is for being filled with nitrogen after below 150Pa.
4., for performing a running gate system for the control nitrogen pouring procedure of nitrogenous steel ingot described in any one of claim 1-3, it is special
Levy and be, including: vacuum tank (6), the ingot mould (4) being positioned in described vacuum tank (6) and be placed in described vacuum tank
The tundish (2) of body (6) top；
Wherein, the tapping hole of described tundish (2) connects with the steel mouth that waters of described ingot mould (4), it is ensured that molten steel is from described centre
The tapping hole of bag (2) injects in ingot mould (4)；
Described tundish core bar (9) upper end connect have nitrogen cylinder (12), it is ensured that molten steel under nitrogen protection atmosphere from tundish (2)
Tapping hole inject in ingot mould (4)；
Described vacuum tank (6) connects vacuum system and nitrogen bus system (5).
Running gate system the most according to claim 4, it is characterised in that between described vacuum tank (6) and described tundish (2)
It is provided with vacuum lid (3), there is the mozzle (13) of up/down perforation, on described mozzle (13) in described vacuum lid (3)
End connects with described tundish (2) tapping hole, and described mozzle (13) lower end connects with the steel mouth that waters of described ingot mould (4).
6. according to running gate system described in claim 4 or 5, it is characterised in that described vacuum tank is provided with Pressure gauge on (6)
(15)。
Running gate system the most according to claim 6, it is characterised in that described vacuum tank (6) and described vacuum system, nitrogen
Valve (8,19) it is provided with between bus system (5).
Running gate system the most according to claim 5, it is characterised in that on described vacuum tank (6) and described vacuum lid (3)
It is provided with gas bleeder valve (14,16).
Running gate system the most according to claim 4, it is characterised in that described nitrogen bus system (5) has nitrogen cylinder group
(18) the gas bus bar (21) and with each nitrogen cylinder of described nitrogen cylinder group (18) connected.
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Cited By (2)
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| CN111593247A (en) * | 2020-05-21 | 2020-08-28 | 中冶东方工程技术有限公司 | Remelting and encrypting method and system for nitrided alloy |
| CN115612910A (en) * | 2021-07-16 | 2023-01-17 | 天津重型装备工程研究有限公司 | Nitrogen-controlled stainless steel smelting and ingot casting method for ultra-supercritical steam turbine rotor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115612910A (en) * | 2021-07-16 | 2023-01-17 | 天津重型装备工程研究有限公司 | Nitrogen-controlled stainless steel smelting and ingot casting method for ultra-supercritical steam turbine rotor |
| CN115612910B (en) * | 2021-07-16 | 2023-11-14 | 天津重型装备工程研究有限公司 | Nitrogen-controlled stainless steel smelting ingot casting method for ultra-supercritical steam turbine rotor |
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| CN106180598B (en) | 2019-04-30 |
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