CN106244930B - It is a kind of to improve the method that steel alloy D classes are carefully inclusion behavior - Google Patents
It is a kind of to improve the method that steel alloy D classes are carefully inclusion behavior Download PDFInfo
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- CN106244930B CN106244930B CN201610617738.1A CN201610617738A CN106244930B CN 106244930 B CN106244930 B CN 106244930B CN 201610617738 A CN201610617738 A CN 201610617738A CN 106244930 B CN106244930 B CN 106244930B
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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 method that steel alloy D classes are carefully inclusion behavior is improved the invention discloses a kind of, this method includes 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 are as follows：It is first placed into intermediate frequency furnace and carries out melting, then refined（LF+VD）, using ESR meltings, then it is heat-treated after forging, is finally machined out；Reducible oxide-based composition FexOy, MnO, SiO in primary smelting slag are avoided by steel alloy made from present invention production2The gas content in secondary oxidation and more abundant removal molten steel to Al in steel, reduces the endogenous inclusion generated during primary smelting to the greatest extent, then progress electroslag remelting process, further removes spherical oxide.
Description
Technical field
The present invention relates to a kind of method that raising is carefully inclusion behavior, specially a kind of raising steel alloy D classes are carefully folder
Sundries grade method for distinguishing, belongs to steel alloy applied technical field.
Background technology
With the increase and environmental requirement of domestic electricity consumption and the development of China's gas turbine manufacturing technology, gas turbine
Generating set is largely used to, produces the important component that purer good gas turbine component is material work.Combustion gas wheel
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 represent more theoretical subjects and the level of aggregation of multiple-project field development, are the frontier technologies of 21 century.Hair
Exhibition integrate new technology, new material, new process gas turbine industry, be the important of national high-tech level and scientific and technological strength
One of mark has very prominent strategic position.
Often there is reducible oxide-based composition FexOy, MnO, SiO2 to steel in process, in slag in traditional steel alloy
The secondary oxidation of middle Al, the processing method for making the steel ingot lumber recovery of steel alloy low and traditional need the content to 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 manufacture cost
Service life reduces.
Invention content
The purpose of the present invention be that solve the above-mentioned problems and provide it is a kind of raising steel alloy D classes be carefully field trash grade
Method for distinguishing.
The present invention is achieved through the following technical solutions above-mentioned purpose, and a kind of raising steel alloy D classes are 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%th, 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 are as follows：
Step A, element melting in intermediate frequency furnace, 1550~1600 DEG C of smelting temperature are adjusted in fusion process needed for taking
The content of each element makes its weight ratio meet design requirement；
Step B, bull ladle enters and is smelted in ladle refining LF stoves after the completion of step A, and seat of coming out of the stove after smelting inclines slag
100%；
Step C, continue melting after vacuum degassing furnaceman VD position is hung in after the completion of step B, fine adjustment is each in fusion process
The content of element makes its weight ratio meet design requirement；
Step D, it after the alloy material ingredient after the completion of step C fine tunings reaches requirement, is added in right amount according to bath analysis de-
Oxygen agent, when 1500~1530 DEG C of bull ladles of temperature pour into electrode bar；
Step E, ESR re melting process is carried out to electrode bar made from step D and steel ingot is made；
Step F, conducting forging processing is carried out to steel ingot made from step E, is forged using 2000T press, using two upsettings two
The intermediate base of technique forging is pulled out, then finished product is forged using flat-die hammer；
Step G, the step F finished product materials forged are heat-treated, are machined out after the completion of heat treatment.
Preferably, the smelting process in step B is as follows：
1), the initial smelting period in LF stoves, when liquid steel temperature reaches 1620~1640 DEG C, when reaching 0.5~1.0m/t,
It is inserted into J-Ca lines；
2), LF smelts the later stage, when slag bleaches, outputs LF stoves position and is inserted into J-Ca lines (1.0~1.5m/t), and be inserted into
Ca-Si lines (0.5~1.0m/t), at the same time, the seat that will come out of the stove incline slag 100%, avoid reducible oxide-based composition FexOy in slag,
MnO, SiO2 remove S contents, as possible to the gas content in the secondary oxidation of Al in steel and more abundant removal molten steel along band
The endogenous inclusion generated during primary smelting is reduced, electroslag remelting process is then carried out, further removes spherical oxide.
Preferably, the VD evacuated times in step C are 18~20min, break sampling analysis C, N and according to target value adjustment after sky
Cr-N is added in, Ar stirrings (rushing 5~8min of Ar time controls), sampling analysis C, N and being according to target worth is carried out again after stirring fully
Fine tuning.
The beneficial effects of the invention are as follows：This kind improves the steel alloy that the method that steel alloy D classes are carefully inclusion behavior is smelted
With good mechanical performance and chemical stability, by LF initial smelting periods, as 1620~1640 DEG C of insertion J- of liquid steel temperature
Ca lines (0.5~1.0m/t)；LF smelts the later stage, when slag bleaches LF stove positions are outputed in preparation when be inserted into J-Ca lines (1.0~1.5m/
T), Ca-Si lines (0.5~1.0m/t) are inserted into and, seat of coming out of the stove immediately inclines slag 100%, avoids reducible oxide-based composition Fe in slagxOy、
MnO、SiO2The gas content in secondary oxidation and more abundant removal molten steel to Al in steel, at the same time removes S in alloy
Content reduces the endogenous inclusion generated during primary smelting to the greatest extent, then carries out electroslag remelting process, further remove ball
Shape oxide has good economic benefit and social benefit, is suitble to promote the use of.
Specific embodiment
Below in conjunction with the embodiment of the present invention, the technical solution in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, those of ordinary skill in the art's all other embodiments obtained without making creative work, all
Belong to the scope of protection of the invention.
Embodiment one：
It is a kind of to improve the method that steel alloy D classes are carefully inclusion behavior, with weight percentage, including C：0.12%~
0.18%th, 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%th, N：0.02%~0.04%, P：≤ 0.020%, S：≤ 0.015% and surplus Fe；Its step are as follows：
Element melting in intermediate frequency furnace, 1550~1600 DEG C of smelting temperature adjust each element in fusion process needed for taking
Content, its weight ratio is made to meet design requirement；Bull ladle enters after the completion of step is smelted in ladle refining LF stoves, is gone out after smelting
Stove seat inclines slag 100%；Continue melting after hanging in vacuum degassing furnaceman VD position after the completion, the fine adjustment each element in fusion process
Content makes its weight ratio meet design requirement；After the alloy material ingredient after the completion of fine tuning reaches requirement, fitted according to bath analysis
Amount adds in deoxidier, when 1500~1530 DEG C of bull ladles of temperature pour into electrode bar；ESR re melting process is carried out to electrode bar obtained
Steel ingot is made；Conducting forging processing is carried out to steel ingot obtained, is forged using 2000T press, technique forging is pulled out using two upsettings two
Intermediate base, then finished product is forged using flat-die hammer；The finished product material of forging is heat-treated, machine is carried out after the completion of heat treatment and is added
Work.
Smelting process in step B is as follows：
1), the initial smelting period in LF stoves when liquid steel temperature reaches 1620~1640 DEG C, when reaching 0.5m/t, is inserted into
J-Ca lines；
2), LF smelts the later stage, and when reaching 1.0m/t, and slag bleaches when LF stove positions are outputed in preparation and is inserted into J-Ca lines, when
When reaching 0.5m/t, Ca-Si lines are inserted into, at the same time, the seat that will come out of the stove inclines slag 100%, avoids reducible oxide-based composition in slag
FexOy, MnO, SiO2 contain the gas content in the secondary oxidation of Al in steel and more abundant removal molten steel along band removal S
Amount reduces the endogenous inclusion generated during primary smelting to the greatest extent, then carries out electroslag remelting process, further remove spherical
Oxide.
VD evacuated times in step C are 18min, break sampling analysis C, N and according to target value adjustment addition Cr-N, Ar after sky
Stirring, sampling analysis C, N and being according to target worth is finely adjusted again after stirring fully, with reference to the control of remaining Al, Si and element nb
And it is finely adjusted.
Embodiment one：
It is a kind of to improve the method that steel alloy D classes are carefully inclusion behavior, with weight percentage, including C：0.12%~
0.18%th, 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%th, N：0.02%~0.04%, P：≤ 0.020%, S：≤ 0.015% and surplus Fe；Its step are as follows：
Element melting in intermediate frequency furnace, 1550~1600 DEG C of smelting temperature adjust each element in fusion process needed for taking
Content, its weight ratio is made to meet design requirement；Bull ladle enters after the completion of step is smelted in ladle refining LF stoves, is gone out after smelting
Stove seat inclines slag 100%；Continue melting after hanging in vacuum degassing furnaceman VD position after the completion, the fine adjustment each element in fusion process
Content makes its weight ratio meet design requirement；After the alloy material ingredient after the completion of fine tuning reaches requirement, fitted according to bath analysis
Amount adds in deoxidier, when 1500~1530 DEG C of bull ladles of temperature pour into electrode bar；ESR re melting process is carried out to electrode bar obtained
Steel ingot is made；Conducting forging processing is carried out to steel ingot obtained, is forged using 2000T press, technique forging is pulled out using two upsettings two
Intermediate base, then finished product is forged using flat-die hammer；The finished product material of forging is heat-treated, machine is carried out after the completion of heat treatment and is added
Work.
Smelting process in step B is as follows：
1), the initial smelting period in LF stoves when liquid steel temperature reaches 1620~1640 DEG C, when reaching 1.0m/t, is inserted into
J-Ca lines；
2), LF smelts the later stage, and when reaching 1.5m/t, and slag bleaches when LF stove positions are outputed in preparation and is inserted into J-Ca lines, when
When reaching .0m/t, be inserted into Ca-Si lines, at the same time, the seat that will come out of the stove inclines slag 100%, avoid reducible oxide-based composition FexOy in slag,
MnO, SiO2 remove S contents, as possible to the gas content in the secondary oxidation of Al in steel and more abundant removal molten steel along band
The endogenous inclusion generated during primary smelting is reduced, electroslag remelting process is then carried out, further removes spherical oxide.
VD evacuated times in step C are 20min, break sampling analysis C, N and according to target value adjustment addition Cr-N, Ar after sky
Stirring, sampling analysis C, N and being according to target worth is finely adjusted again after stirring fully, with reference to the control of remaining Al, Si and element nb
And it is finely adjusted.
Embodiment one：
It is a kind of to improve the method that steel alloy D classes are carefully inclusion behavior, with weight percentage, including C：0.12%~
0.18%th, 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%th, N：0.02%~0.04%, P：≤ 0.020%, S：≤ 0.015% and surplus Fe；Its step are as follows：
Element melting in intermediate frequency furnace, 1550~1600 DEG C of smelting temperature adjust each element in fusion process needed for taking
Content, its weight ratio is made to meet design requirement；Bull ladle enters after the completion of step is smelted in ladle refining LF stoves, is gone out after smelting
Stove seat inclines slag 100%；Continue melting after hanging in vacuum degassing furnaceman VD position after the completion, the fine adjustment each element in fusion process
Content makes its weight ratio meet design requirement；After the alloy material ingredient after the completion of fine tuning reaches requirement, fitted according to bath analysis
Amount adds in deoxidier, when 1500~1530 DEG C of bull ladles of temperature pour into electrode bar；ESR re melting process is carried out to electrode bar obtained
Steel ingot is made；Conducting forging processing is carried out to steel ingot obtained, is forged using 2000T press, technique forging is pulled out using two upsettings two
Intermediate base, then finished product is forged using flat-die hammer；The finished product material of forging is heat-treated, machine is carried out after the completion of heat treatment and is added
Work.
Smelting process in step B is as follows：
1), the initial smelting period in LF stoves when liquid steel temperature reaches 1620~1640 DEG C, when reaching 0.8m/t, is inserted into
J-Ca lines；
2), LF smelts the later stage, and when reaching 1.2m/t, and slag bleaches when LF stove positions are outputed in preparation and is inserted into J-Ca lines, when
When reaching 0.5~1.0m/t, Ca-Si lines are inserted into, at the same time, the seat that will come out of the stove inclines slag 100%, avoids reducible oxide-based composition in slag
FexOy, MnO, SiO2 contain the gas content in the secondary oxidation of Al in steel and more abundant removal molten steel along band removal S
Amount reduces the endogenous inclusion generated during primary smelting to the greatest extent, then carries out electroslag remelting process, further remove spherical
Oxide.
VD evacuated times in step C are 19min, break sampling analysis C, N and according to target value adjustment addition Cr-N, Ar after sky
Stirring, sampling analysis C, N and being according to target worth is finely adjusted again after stirring fully, with reference to the control of remaining Al, Si and element nb
And it is finely adjusted.
According to the steel alloy that embodiment one, two, three makes by detecting, the D classes in steel alloy are carefully inclusion behavior symbol
National standard is closed, there is good mechanical performance and chemical stability by the stainless steel material that this kind of method makes, in use
The gas turbine component materials of process preparation are stated, are tested through room temperature, the results showed that D classes are carefully that spherical oxide has comparison to show
Writing improves, result of the test such as following table：
The gas turbine blade material manufactured with this method, can compare that significantly improve the D classes of steel alloy be carefully field trash,
Steel ingot lumber recovery is improved, more creates considerable productivity effect.
It is obvious to a person skilled in the art that the present invention is not limited to the details of above-mentioned exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requirement rather than above description limit, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any label in claim should not be considered as to the involved claim of limitation.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in each embodiment can also be properly combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (3)
1. a kind of improve the method that steel alloy D classes are carefully inclusion behavior, which is characterized 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 are as follows：Step A,
Element melting in intermediate frequency furnace needed for taking, 1550 ~ 1600 DEG C of smelting temperature, the content of adjusting each element in fusion process,
Its weight ratio is made to meet design requirement；Step B, bull ladle enters and is smelted in ladle refining LF stoves after the completion of step A, institute
Stating smelting process is：The initial smelting period in LF stoves when liquid steel temperature reaches 1620 ~ 1640 DEG C, is inserted into the .0 of 0 .5 ~ 1
The J-Ca lines of m/t；The later stage is smelted in LF stoves, when slag bleaches, LF stoves position is outputed and is inserted into J-Ca lines, and be inserted into
Ca-Si lines, at the same time, the seat that will come out of the stove inclines 100 % of slag；Step C, vacuum degassing furnaceman VD is hung in after the completion of step B
Continue melting behind position, the content of fine adjustment each element in fusion process makes its weight ratio meet design requirement；Step D, when
After alloy material ingredient after the completion of step C fine tunings reaches requirement, deoxidier is added according to bath analysis in right amount, when temperature is
Bull ladle pours into electrode bar at 1500 ~ 1530 DEG C；Step E, ESR re melting process is carried out to electrode bar made from step D
Steel ingot is made；Step F, conducting forging processing is carried out to steel ingot made from step E, is forged using 2000T press, used
The intermediate base of technique forging is pulled out in two upsettings two, then forges finished product using flat-die hammer；Step G, by the finished product material that step F is forged into
Row heat treatment, is machined out after the completion of heat treatment.
2. a kind of raising steel alloy D classes according to claim 1 are carefully the method for inclusion behavior, feature exists
In：The later stage is smelted in LF stoves in step B, avoids reducible oxide-based composition Fe in slagxOy、MnO、SiO2To Al in steel
Secondary oxidation and the gas content more fully in removal molten steel, along band removal S contents, during reducing primary smelting to the greatest extent
The endogenous inclusion of generation then carries out electroslag remelting process, further removes spherical oxide.
3. a kind of raising steel alloy D classes according to claim 1 are carefully the method for inclusion behavior, feature exists
In：VD evacuated times in step C are 18 ~ 20 min, break sampling analysis C, N and according to target value adjustment addition after sky
Cr-N, Ar are stirred, and sampling analysis C, N and being according to target worth is finely adjusted again after stirring fully.
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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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