CN106244930A - A kind of improve the method that steel alloy D class is carefully inclusion behavior - Google Patents
A kind of improve the method that steel alloy D class is carefully inclusion behavior Download PDFInfo
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- CN106244930A CN106244930A CN201610617738.1A CN201610617738A CN106244930A CN 106244930 A CN106244930 A CN 106244930A CN 201610617738 A CN201610617738 A CN 201610617738A CN 106244930 A CN106244930 A CN 106244930A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
Abstract
The invention discloses and a kind of improve the method that steel alloy D class is carefully inclusion behavior, the method comprises the following steps: by weight percentage, including C:0.12% ~ 0.18%, Si:0.2% ~ 0.45%, Mn:0.1% ~ 0.2%, Ni:12% ~ 13%, Al:4.5% ~ 4.7%, Zr:1.15% ~ 1.35%, Cr, 4.05% ~ 4.35%, Ti:2.35% ~ 2.75%, Nb:0.2% ~ 0.3%, V:0.12% ~ 0.14%, N:0.02% ~ 0.04%, P :≤0.020%, S :≤0.015% and surplus Fe；Its step is as follows: is first placed into intermediate frequency furnace and carries out melting, then carries out refine (LF+VD), then through ESR melting, then forge after-baking, finally it is machined out；Produce prepared steel alloy by the present invention and avoid reducible oxide-based composition FexOy, MnO, SiO in primary smelting slag2To the secondary oxidation of Al in steel, and more fully remove the gas content in molten steel, the endogenous inclusion produced during as far as possible reducing primary smelting, carry out electroslag remelting operation subsequently, remove spherical oxide further.
Description
Technical field
The present invention relates to a kind of raising is carefully the method for inclusion behavior, and be specially one improving steel alloy D class is carefully folder
Foreign material level method for distinguishing, belongs to steel alloy applied technical field.
Background technology
Along with the increase of domestic power consumption and environmental requirement and the development of China's gas turbine manufacturing technology, gas turbine
Being largely used to generating set, the gas turbine parts producing purer high-quality are the important component parts of material work.Combustion gas is taken turns
Machine is a kind of first and then complicated cooler power mechanized equipment, is typical new and high technology intensive product, as high-tech
Carrier, gas turbine represents many theoretical subjects and the level of aggregation of multiple-project field development, is the frontier technology of 21 century.Send out
Exhibition integrates the gas turbine industry of new technique, new material, new technology, is the important of country's high-tech level and scientific and technological strength
One of mark, has the most prominent strategic position.
, in the course of processing, often there is reducible oxide-based composition FexOy, MnO, SiO in traditional steel alloy in its slag2To steel
The secondary oxidation of middle Al, the steel ingot lumber recovery making steel alloy is low, and traditional processing method needs the content of S in steel alloy
By being processed further reducing the content of S, the alloy steel inclusion made increases, and makes steel alloy while increasing manufacturing cost
Service life reduces.
Summary of the invention
The purpose of the present invention is that providing a kind of steel alloy D class that improves to solve the problems referred to above is carefully field trash level
Method for distinguishing.
The present invention is achieved through the following technical solutions above-mentioned purpose, and a kind of steel alloy D class that improves is carefully inclusion behavior
Method, with weight percentage, including C:0.12%～0.18%, Si:0.2%～0.45%, Mn:0.1%～0.2%, Ni:
12%～13%, Al:4.5%～4.7%, Zr:1.15%～1.35%, Cr, 4.05%～4.35%, Ti:2.35%～
2.75%, Nb:0.2%～0.3%, V:0.12%～0.14%, N:0.02%～0.04%, P :≤0.020%, S :≤
0.015% and surplus Fe；Its step is as follows:
Step A, take the melting in intermediate frequency furnace of required element, smelting temperature 1550～1600 DEG C, fusion process regulates each unit
The content of element so that it is weight ratio meets design requirement；
After step B, step A complete, bull ladle enters in ladle refining LF stove to smelt, and seat of coming out of the stove after smelting inclines slag 100%；
Step C, step B continue melting, each element of fine adjustment in fusion process after hanging in vacuum degassing furnaceman VD position after completing
Content so that it is weight ratio meets design requirement；
After step D, alloy material composition after step C has been finely tuned reach requirement, add deoxidizer in right amount according to bath analysis,
When temperature 1500～1530 DEG C of bull ladles pour into electrode bar；
Step E, the electrode bar preparing step D carry out ESR re melting process and make steel ingot；
Step F, the steel ingot preparing step E carry out conducting forging processing, use 2000T press to forge, use two upsettings two to pull out work
Skill forging intermediate blank, then use flat-die hammer to forge finished product；
Step G, by step F forge finished product material carry out heat treatment, be machined out after heat treatment completes.
Preferably, the smelting process in step B is as follows:
1), in LF stove initial smelting period, when liquid steel temperature reaches 1620～1640 DEG C, when reaching 0.5～1.0m/t, insert
J-Ca line；
2), LF smelt the later stage, when slag bleaches, output LF stove position and insert J-Ca line (1.0～1.5m/t), and insert Ca-Si
Line (0.5～1.0m/t), meanwhile, seat of coming out of the stove inclines slag 100%, it is to avoid reducible oxide-based composition FexOy, MnO, SiO2 in slag
To the secondary oxidation of Al in steel, and more fully remove the gas content in molten steel, remove S content along band, reduce once as far as possible
The endogenous inclusion produced in smelting process, carries out electroslag remelting operation subsequently, removes spherical oxide further.
Preferably, the VD evacuated time in step C is 18～20min, sample analysis C, N be according to target worth adjustment after broken sky
Adding Cr-N, Ar stirring (rush Ar time controls 5～8min), stirring rear sample analysis C, N being according to target worth is carried out again
Fine setting.
The invention has the beneficial effects as follows: this kind improves the steel alloy that the method that steel alloy D class is carefully inclusion behavior is smelted
There is good mechanical performance and chemical stability, by LF initial smelting period, as liquid steel temperature 1620～1640 DEG C of insertion J-
Ca line (0.5～1.0m/t)；LF smelts the later stage, inserts J-Ca line (1.0～1.5m/ when slag bleaches when LF stove position is outputed in preparation
T), and inserting Ca-Si line (0.5～1.0m/t), seat of coming out of the stove immediately inclines slag 100%, it is to avoid reducible oxide-based composition Fe in slagxOy、
MnO、SiO2To the secondary oxidation of Al in steel, and more fully remove the gas content in molten steel, meanwhile remove S in alloy
Content, the endogenous inclusion produced during as far as possible reducing primary smelting, carry out electroslag remelting operation subsequently, remove ball further
Shape oxide, has good economic benefit and social benefit, is suitable for promoting the use of.
Detailed description of the invention
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, all
Belong to the scope of protection of the invention.
Embodiment one:
A kind of improve the method that steel alloy D class is carefully inclusion behavior, with weight percentage, including C:0.12%～0.18%,
Si:0.2%～0.45%, Mn:0.1%～0.2%, Ni:12%～13%, Al:4.5%～4.7%, Zr:1.15%～
1.35%, Cr, 4.05%～4.35%, Ti:2.35%～2.75%, Nb:0.2%～0.3%, V:0.12%～0.14%,
N:0.02%～0.04%, P :≤0.020%, S :≤0.015% and surplus Fe；Its step is as follows:
Step A, take the melting in intermediate frequency furnace of required element, smelting temperature 1550～1600 DEG C, fusion process regulates each unit
The content of element so that it is weight ratio meets design requirement；After step B, step A complete, bull ladle enters in ladle refining LF stove to carry out smelting
Refining, seat of coming out of the stove after smelting inclines slag 100%；Step C, step B continue melting after hanging in vacuum degassing furnaceman VD position after completing,
The content of each element of fine adjustment in fusion process so that it is weight ratio meets design requirement；Step D, after step C has been finely tuned
After alloy material composition reaches requirement, add deoxidizer in right amount according to bath analysis, when temperature 1500～1530 DEG C of bull ladles pour into
Electrode bar；Step E, the electrode bar preparing step D carry out ESR re melting process and make steel ingot；Step F, the steel that step E is prepared
Ingot carries out conducting forging processing, uses 2000T press to forge, and uses two upsettings two to pull out technique forging intermediate blank, then uses open die forging
Hammering causes product；Step G, by step F forge finished product material carry out heat treatment, be machined out after heat treatment completes.
Smelting process in step B is as follows:
1), in LF stove initial smelting period, when liquid steel temperature reaches 1620～1640 DEG C, when reaching 0.5m/t, insert J-Ca
Line；
2), LF smelt the later stage, when reaching 1.0m/t, and slag bleaches when LF stove position is outputed in preparation and inserts J-Ca line, when reaching
During 0.5m/t, inserting Ca-Si line, meanwhile, seat of coming out of the stove inclines slag 100%, it is to avoid reducible oxide-based composition FexOy in slag,
MnO, SiO2 are to the secondary oxidation of Al in steel, and more fully remove the gas content in molten steel, remove S content along band, as far as possible
The endogenous inclusion produced during reducing primary smelting, carries out electroslag remelting operation subsequently, removes spherical oxide further.
VD evacuated time in step C is 18min, and after broken sky, sample analysis C, N according to target value adjustment add Cr-N, Ar
Stirring, after stirring fully, sample analysis C, N being according to target worth is finely adjusted, again with reference to remnants Al, Si and the control of element nb
And be finely adjusted.
Embodiment two:
A kind of improve the method that steel alloy D class is carefully inclusion behavior, with weight percentage, including C:0.12%～0.18%,
Si:0.2%～0.45%, Mn:0.1%～0.2%, Ni:12%～13%, Al:4.5%～4.7%, Zr:1.15%～
1.35%, Cr, 4.05%～4.35%, Ti:2.35%～2.75%, Nb:0.2%～0.3%, V:0.12%～0.14%,
N:0.02%～0.04%, P :≤0.020%, S :≤0.015% and surplus Fe；Its step is as follows:
Step A, take the melting in intermediate frequency furnace of required element, smelting temperature 1550～1600 DEG C, fusion process regulates each unit
The content of element so that it is weight ratio meets design requirement；After step B, step A complete, bull ladle enters in ladle refining LF stove to carry out smelting
Refining, seat of coming out of the stove after smelting inclines slag 100%；Step C, step B continue melting after hanging in vacuum degassing furnaceman VD position after completing,
The content of each element of fine adjustment in fusion process so that it is weight ratio meets design requirement；Step D, after step C has been finely tuned
After alloy material composition reaches requirement, add deoxidizer in right amount according to bath analysis, when temperature 1500～1530 DEG C of bull ladles pour into
Electrode bar；Step E, the electrode bar preparing step D carry out ESR re melting process and make steel ingot；Step F, to step E prepare
Steel ingot carries out conducting forging processing, uses 2000T press to forge, and uses two upsettings two to pull out technique forging intermediate blank, then uses freedom
Forging hammer forging finished product；Step G, by step F forge finished product material carry out heat treatment, be machined out after heat treatment completes.
Smelting process in step B is as follows:
1), in LF stove initial smelting period, when liquid steel temperature reaches 1620～1640 DEG C, when reaching 1.0m/t, insert J-Ca
Line；
2), LF smelt the later stage, when reaching 1.5m/t, and slag bleaches when LF stove position is outputed in preparation and inserts J-Ca line, when reaching
.0m/t time, inserting Ca-Si line, meanwhile, seat of coming out of the stove inclines slag 100%, it is to avoid reducible oxide-based composition FexOy in slag, MnO,
SiO2 is to the secondary oxidation of Al in steel, and more fully removes the gas content in molten steel, removes S content along band, reduces as far as possible
The endogenous inclusion produced during primary smelting, carries out electroslag remelting operation subsequently, removes spherical oxide further.
VD evacuated time in step C is 20min, and after broken sky, sample analysis C, N according to target value adjustment add Cr-N, Ar
Stirring, after stirring fully, sample analysis C, N being according to target worth is finely adjusted, again with reference to remnants Al, Si and the control of element nb
And be finely adjusted.
Embodiment three:
A kind of improve the method that steel alloy D class is carefully inclusion behavior, with weight percentage, including C:0.12%～0.18%,
Si:0.2%～0.45%, Mn:0.1%～0.2%, Ni:12%～13%, Al:4.5%～4.7%, Zr:1.15%～
1.35%, Cr, 4.05%～4.35%, Ti:2.35%～2.75%, Nb:0.2%～0.3%, V:0.12%～0.14%,
N:0.02%～0.04%, P :≤0.020%, S :≤0.015% and surplus Fe；Its step is as follows:
Step A, take the melting in intermediate frequency furnace of required element, smelting temperature 1550～1600 DEG C, fusion process regulates each unit
The content of element so that it is weight ratio meets design requirement；After step B, step A complete, bull ladle enters in ladle refining LF stove to carry out smelting
Refining, seat of coming out of the stove after smelting inclines slag 100%；Step C, step B continue melting after hanging in vacuum degassing furnaceman VD position after completing,
The content of each element of fine adjustment in fusion process so that it is weight ratio meets design requirement；Step D, after step C has been finely tuned
After alloy material composition reaches requirement, add deoxidizer in right amount according to bath analysis, when temperature 1500～1530 DEG C of bull ladles pour into
Electrode bar；Step E, the electrode bar preparing step D carry out ESR re melting process and make steel ingot；Step F, the steel that step E is prepared
Ingot carries out conducting forging processing, uses 2000T press to forge, and uses two upsettings two to pull out technique forging intermediate blank, then uses open die forging
Hammering causes product；Step G, by step F forge finished product material carry out heat treatment, be machined out after heat treatment completes.
Smelting process in step B is as follows:
1), in LF stove initial smelting period, when liquid steel temperature reaches 1620～1640 DEG C, when reaching 0.8m/t, insert J-Ca
Line；
2), LF smelt the later stage, when reaching 1.2m/t, and slag bleaches when LF stove position is outputed in preparation and inserts J-Ca line, when reaching
When 0.5～1.0m/t, inserting Ca-Si line, meanwhile, seat of coming out of the stove inclines slag 100%, it is to avoid reducible oxide-based composition in slag
FexOy, MnO, SiO2 are to the secondary oxidation of Al in steel, and more fully remove the gas content in molten steel, remove S along band and contain
Amount, the endogenous inclusion produced during as far as possible reducing primary smelting, carry out electroslag remelting operation subsequently, remove spherical further
Oxide.
VD evacuated time in step C is 19min, and after broken sky, sample analysis C, N according to target value adjustment add Cr-N, Ar
Stirring, after stirring fully, sample analysis C, N being according to target worth is finely adjusted, again with reference to remnants Al, Si and the control of element nb
And be finely adjusted.
Passing through detection according to the steel alloy that embodiment one, two, three makes, the D class in steel alloy is carefully inclusion behavior symbol
Closing national standard, the stainless steel material made by this kind of method has good mechanical performance and chemical stability, in employing
Stating gas turbine component materials prepared by process, test through room temperature, result shows that D class is carefully that spherical oxide has comparison to show
Write and improve, result of the test such as following table:
| Project | D is thin | Remarks |
| 1# | 2.5 | Do not use said method |
| 2# | 2.0 | Do not use said method |
| 3# | 3.0 | Do not use said method |
| 4# | 2.5 | Do not use said method |
| 5# | 1.5 | Use said method |
| 6# | 1.0 | Use said method |
| 7# | 1.5 | Use said method |
| 8# | 1.0 | Use said method |
| Standard | ≤2.0 |
The gas turbine blade material manufactured by this method, it is possible to compare that to significantly improve the D class of steel alloy be carefully field trash,
Improve steel ingot lumber recovery, more create considerable productivity effect.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of the spirit or essential attributes of the present invention, it is possible to realize the present invention in other specific forms.Therefore, no matter
From the point of view of which point, all should regard embodiment as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all by fall in the implication of equivalency and scope of claim
Change is included in the present invention.Should not be considered as limiting involved claim by any labelling in claim.
Although moreover, it will be appreciated that this specification is been described by according to embodiment, but the most each embodiment only wraps
Containing an independent technical scheme, this narrating mode of description is only that for clarity sake those skilled in the art should
Description can also be formed those skilled in the art through appropriately combined as an entirety, the technical scheme in each embodiment
May be appreciated other embodiments.
Claims (3)
1. one kind is improved the method that steel alloy D class is carefully inclusion behavior, it is characterised in that with weight percentage, including C:
0.12% ~ 0.18%, Si:0.2% ~ 0.45%, Mn:0.1% ~ 0.2%, Ni:12% ~ 13%, Al:4.5% ~ 4.7%, Zr:1.15% ~
1.35%, Cr, 4.05% ~ 4.35%, Ti:2.35% ~ 2.75%, Nb:0.2% ~ 0.3%, V:0.12% ~ 0.14%, N:0.02% ~ 0.04%,
P :≤0.020%, S :≤0.015% and surplus Fe；Its step is as follows:
Step A, take the melting in intermediate frequency furnace of required element, smelting temperature 1550 ~ 1600 DEG C, fusion process regulates each element
Content so that it is weight ratio meets design requirement；
After step B, step A complete, bull ladle enters in ladle refining LF stove to smelt, and seat of coming out of the stove after smelting inclines slag 100%；
Step C, step B continue melting, each element of fine adjustment in fusion process after hanging in vacuum degassing furnaceman VD position after completing
Content so that it is weight ratio meets design requirement；
After step D, alloy material composition after step C has been finely tuned reach requirement, add deoxidizer in right amount according to bath analysis,
When 1500 ~ 1530 DEG C of bull ladles of temperature pour into electrode bar；
Step E, the electrode bar preparing step D carry out ESR re melting process and make steel ingot；
Step F, the steel ingot preparing step E carry out conducting forging processing, use 2000T press to forge, use two upsettings two to pull out work
Skill forging intermediate blank, then use flat-die hammer to forge finished product；
Step G, by step F forge finished product material carry out heat treatment, be machined out after heat treatment completes.
The most according to claim 1 a kind of improve the method that steel alloy D class is carefully inclusion behavior, it is characterised in that: step
Smelting process in rapid B is as follows:
1), in LF stove initial smelting period, when liquid steel temperature reaches 1620 ~ 1640 DEG C, when reaching 0.5 ~ 1.0m/t, insert J-
Ca line；
2), LF smelt the later stage, when slag bleaches, output LF stove position and insert J-Ca line, and insert Ca-Si line, meanwhile, will
Seat of coming out of the stove inclines slag 100%, it is to avoid in slag, reducible oxide-based composition FexOy, MnO, SiO2 are to the secondary oxidation of Al, Yi Jigeng in steel
Fully removing the gas content in molten steel, remove S content along band, the interior life produced during as far as possible reducing primary smelting is mingled with
Thing, carries out electroslag remelting operation subsequently, removes spherical oxide further.
The most according to claim 1 a kind of improve the method that steel alloy D class is carefully inclusion behavior, it is characterised in that: step
VD evacuated time in rapid C is 18 ~ 20min, and after broken sky, sample analysis C, N according to target value adjustment add Cr-N, Ar stirring, stir
Mix after fully sample analysis C, N being according to target worth again to be finely adjusted.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006104519A (en) * | 2004-10-05 | 2006-04-20 | Daido Steel Co Ltd | High toughness hot tool steel and its production method |
| CN104271775A (en) * | 2012-05-07 | 2015-01-07 | 沃斯贝茨公司 | Tough bainitic heat treatments on steels for tooling |
| CN104532102A (en) * | 2014-12-09 | 2015-04-22 | 抚顺特殊钢股份有限公司 | Novel manufacturing technology of large-sized carburized bearing steel G20Cr2Ni4A for wind electricity |
| CN105452516A (en) * | 2013-08-08 | 2016-03-30 | 通用电气公司 | Precipitation-hardened stainless steel alloys |
-
2016
- 2016-08-01 CN CN201610617738.1A patent/CN106244930B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006104519A (en) * | 2004-10-05 | 2006-04-20 | Daido Steel Co Ltd | High toughness hot tool steel and its production method |
| CN104271775A (en) * | 2012-05-07 | 2015-01-07 | 沃斯贝茨公司 | Tough bainitic heat treatments on steels for tooling |
| CN105452516A (en) * | 2013-08-08 | 2016-03-30 | 通用电气公司 | Precipitation-hardened stainless steel alloys |
| CN104532102A (en) * | 2014-12-09 | 2015-04-22 | 抚顺特殊钢股份有限公司 | Novel manufacturing technology of large-sized carburized bearing steel G20Cr2Ni4A for wind electricity |
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