CN107747041A - A kind of normalizing state manganese systems air bottle steel and preparation method thereof - Google Patents
A kind of normalizing state manganese systems air bottle steel and preparation method thereof Download PDFInfo
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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
- C22C38/001—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
- C22C38/04—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
- C22C38/12—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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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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
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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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
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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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
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
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Abstract
The present invention provides a kind of normalizing state manganese systems air bottle steel machine preparation method, and the air bottle steel includes according to the composition of air bottle steel described in mass percent meter：C 0.36~0.40%, Si 0.17~0.37%, Mn 1.55~1.70%, Cr≤0.25%, Mo≤0.10%, V≤0.05%, S≤0.005%, P≤0.015%, 40~100ppm of N, surplus Fe.Described normalizing state manganese systems air bottle steel and preparation method thereof uses the production technology of " converter+refining (LF+VD)+continuous casting ", Cr, Mo, V and N element are added in air bottle steel, pass through rational slagging regime in refining process, significantly improve and stablize yield strength and impact flexibility of the air bottle steel under normalizing state, save subsequent heat treatment cost.
Description
Technical field
The invention belongs to special steel manufacturing field, is related to a kind of air bottle steel, more particularly to a kind of normalizing state manganese systems air bottle steel
And preparation method thereof.
Background technology
The most common steel grade of Mn systems gas cylinder tube is 37Mn, and the gas cylinder overall market demand of the material is more than 80%, main application
In industrial gas cylinder (containing medical).Domestic gas cylinder manufacturing enterprise is saves cost, mainly using normalizing heat treatment technique.Normalizing at present
The gas cylinder mechanical property of state 37Mn steel materials is unstable, when there is yield strength and ballistic work not to reach the phenomenon of prior art index
Occur.Gas vessel kind is especially based on manganese systems (such as industrial gas cylinder) and Cr-Mo systems (such as mounted gas cylinder) at present.From the sixties
Rise, it is domestic that 12.25~29.40MPa is generally generally using seamless pipe manufacture gas cylinder, its operating pressure.By gas cylinder is filled
The medium species of dress is a lot, and has inflammable and explosive severe toxicity or etching characteristic, and gas cylinder repeated charging and mobility are big in addition, once
Generation is exploded or leakage, often concurrent fire or poisoning, causes catastrophic failure, therefore the mechanical property of gas cylinder, inside and outside
Portion's quality is particularly important for production safety.
The content of the invention
To solve technical problem present in prior art, the present invention provides a kind of normalizing state manganese systems air bottle steel and its preparation
Method, by the present invention in that with the production technology of " converter+refining (LF+VD)+continuous casting ", Cr, Mo, V and N are added in air bottle steel
Element, by rational slagging regime in refining process, significantly improve and yield strength of the stable air bottle steel under normalizing state and
Impact flexibility, save subsequent heat treatment cost.
To reach above-mentioned purpose, the present invention uses following technical scheme：
It is an object of the present invention to provide a kind of normalizing state manganese systems air bottle steel, according to air bottle steel described in mass percent meter
Composition include：C 0.36~0.40%, Si 0.17~0.37%, Mn 1.55~1.70%, Cr≤0.25%, Mo≤
0.10%, V≤0.05%, S≤0.005%, P≤0.015%, N 40~100ppm, surplus Fe.
Wherein, C mass percent can be 0.36%, 0.365%, 0.37%, 0.375%, 0.38%, 0.385%,
0.39%th, 0.395% or 0.40% etc., Si mass percent can be 0.17%, 0.18%, 0.19%, 0.20%,
0.22%th, 0.25%, 0.28%, 0.30%, 0.32%, 0.35% or 0.37% etc., Mn mass percent can be
1.55%th, 1.56%, 1.58%, 1.60%, 1.62%, 1.65%, 1.68% or 1.70% etc., Cr mass percent can be with
Be 0%, 0.01%, 0.02%, 0.05%, 0.08%, 0.10%, 0.12%, 0.15%, 0.18%, 0.20%, 0.22% or
0.25% etc., Mo mass percent can be 0%, 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%,
0.07%th, 0.08%, 0.09% or 0.10% etc., V mass percent can be 0%, 0.01%, 0.02%, 0.03%,
0.04% or 0.05% etc., S mass percent can be 0%, 0.001%, 0.002%, 0.003%, 0.004% or
0.005% etc., P mass percent can be 0%, 0.001%, 0.002%, 0.005%, 0.008%, 0.010%,
0.011%th, 0.012%, 0.013%, 0.014% or 0.015% etc., N mass percent can be 40ppm, 50ppm,
60ppm, 70ppm, 80ppm, 90ppm or 100ppm etc., it is not limited to cited numerical value, in above-mentioned each number range its
His unrequited numerical value is equally applicable.
As currently preferred technical scheme, include according to the composition of air bottle steel described in mass percent meter：C0.37~
0.38%, Si 0.24~0.30%, Mn 1.63~1.68%, Cr 0.10~0.18%, Mo≤0.08%, V≤0.03%, S
60~90ppm of≤0.003%, P≤0.013%, N, surplus Fe.
The restriction reason of the weight/mass percentage composition of each element is as follows in a kind of normalizing state manganese systems air bottle steel provided by the invention：
C：The intensity of steel can be significantly improved, while the quenching degree and hardenability of steel can be improved again, but also makes the plasticity of steel
Deteriorate, due to consideration that the yield strength performance of material, this steel grade uses the Si of center line, if C content is too high, in normalizing state heat
It can cause that steel pipe yield strength and tensile strength are too high, and opposite low temperature impact properties are relatively low after processing procedure, or even not reach mark
Quasi- lower limit.Because national standard is tighter to gas cylinder tube C component requirements in itself, therefore in view of the combination property of material, in the present invention
C weight/mass percentage composition scope is defined as 0.36%~0.40% in the air bottle steel of offer, more preferably 0.37%~
0.38%.
Si：It is present in the form of admittedly molten in ferrite and austenite, it improves the intensity of solid solution and cold working in steel and become
The effect of shape hardening ratio is extremely strong, is only second to P；But also reduce the toughness and plasticity of steel to a certain extent simultaneously.Si contents are higher
When, if C content is too high, due to higher Si effect in the insulating process after normalizing, easily cause the C graphite in steel
Change.For steel containing Si in heating, surface will form one layer of SiO2 film, so as to improve the high-temperature oxidation resistance of steel, in Cr steel and
Higher Si is added in Mn steel can improve the antioxygenic property of steel.But Si is the element for the yield strength for significantly improving steel,
So Si too high levels, the strong flexor ratio of material can be reduced, so as to reduce the anti-seismic performance of material, the general requirement of compound material,
Si weight/mass percentage composition is defined as 0.17~0.37%, more preferably 0.24 in air bottle steel provided by the invention~
0.30%.
Mn：Ferrite can be dissolved in steel, strengthens matrix, pearlite can be refined in roller repairing and relative can improve pearl
Body of light content, accordingly, it is capable to improve intensity and hardness, improve heat treatment performance, and the plasticity of material is influenceed smaller.As Mn contains
In addition to the Ms points of steel reduce, retained austenite therein is also sharply increased so in heat treatment, is typically required for the increase of amount
Low-temperature treatment is carried out in time, to eliminate the retained austenite in steel, meanwhile, with the increase of Mn contents, its thermal conductivity factor is drastically
Decline, while its linear expansion coefficient but increases, thus easily produces larger internal stress during being heated or cooled of material,
The cracking of workpiece will be caused when serious, so all requirements of compound material, by Mn's in air bottle steel provided by the invention
Weight/mass percentage composition is defined as 1.55~1.70%, more preferably 1.63~1.68%.
Cr：The antioxidation of steel can be significantly improved by adding steel grade, increase the resistance to corrosion of steel.Cr and iron are formed continuously
Solid solution, with C-shaped into a variety of carbide, Cr complicated carbide (Cr, Fe) 7C3, and (Cr, Fe) 23C6 is for the property of steel
It can have a significant impact, particularly the wearability of steel.Cr can dramatically increase the quenching degree of steel, but also increase steel belt roof bolt fragility is inclined
To.Cr is the element with passivation tendency.Therefore certain ingredients Cr add steel in, make steel have it is anticorrosive tendency and it is anti-oxidant
Ability.When it is by certain erosion medium resistance, layer oxide film is formed on the surface of steel part, this tunic is passivating film, passivation
Film is fine and close under favorable conditions, is not dissolved, and when it is destroyed, moreover it is possible to voluntarily recover.A certain metal or
The passivation of steel is not fixed state, and simply for certain medium or condition, if ambient condition changes, passivation will be broken
It is bad.In quenched structural steel, Cr main function is the through hardening performance for improving steel, steel is had good synthesis after quenched
Mechanical property, steel surface can also be made to form a kind of special diaphragm, improve the wear-resisting and decay resistance of steel.More there is Cr first
Plain addition it is low once in a while can to make up the relatively low rear caused gas cylinder tube intensity of C element control with the intensity of a certain degree of raising steel
In offline present status in China.Consider, be defined as Cr weight/mass percentage composition in air bottle steel provided by the invention≤
0.25%, more preferably 0.10~0.18%.
N：In ferrite A bodies can be promoted to be formed, due to the appearance of γ phases, grain coarsening tendency can be reduced, so can change
The toughness and welding performance of kind steel, artificially add N element in steel, and N element is controlled and is remarkably improved steel in certain limit
Impact flexibility, but N content is unsuitable too high, and N can generate nitride with other alloying elements after certain standard, be formed nonmetallic
It is mingled with, causes the impure of molten steel, more there is the harm for reducing other alloys producings, therefore by Control of Nitrogen Content suitable
Scope be only most important factor.Consider and test of many times, by N quality percentage in air bottle steel provided by the invention
Content control is 40~100ppm, more preferably 60~90ppm.
Residual elements P：It was verified that P causes embrittlement of grain boundaries in intergranular segregation, material at high temperature temper brittleness can be caused, together
When P when exceeding certain content, the brittle transition temperatures of steel is improved a lot, causes material at low temperature impact flexibility low, deteriorate steel
The comprehensive mechanical property of material.So present invention design P≤0.015%.
Residual elements S：Solubility all very littles in ferrite and austenite, so during casting blank solidification, with
The solidification of molten steel, S will to ot-yet-hardened liquid portion be enriched with, as a result, the final set position of strand (strand center portion and
Between dendritic tissue) by containing more sulphide inculsion, make the macrostructure of steel uneven.Higher S contents will damage steel
Corrosion stability, steel surface is set to produce pitting corrosion, so S contents are set as by the present invention：S≤0.005%.
The two of the object of the invention are to provide a kind of preparation method of above-mentioned air bottle steel, and the preparation method includes following step
Suddenly：
(1) to molten iron and steel scrap, converter smelting dephosphorization is carried out using double slag process；
(2) while to molten steel pre- desulfurization of blowing is carried out, it is ensured that desulfurization degree reaches 30~40%, is gone forward side by side afterwards using low catch carbon
Row composition initial adjustment, molten steel after being blown；
(3) molten steel carries out LF refining, desulfurization and deoxidation and carries out trimming after the blowing obtained to step (2), obtains
Molten steel after refining；
(4) molten steel carries out VD degassings after the refining obtained to step (3), break it is empty after line feeding, control N content be 40~
100ppm, continuous casting obtain the air bottle steel base.
Composition initial adjustment and trimming in air bottle steel preparation method provided by the invention.Composition initial adjustment refers to that molten steel is turning
After stove puts steel, the first time proportioning of composition is carried out after stove by deoxidation alloying, is closed using silicomanganese+Gao Meng+Gao Ge+V pieces etc.
Gold enters bag in order, ensures that molten steel meets C to composition after energization one-time electrode after refining：0.32~0.35%, Si：0.17~
0.23%, Mn:1.50~1.60%, Cr：0.15~0.20%, V：In the range of 0.02~0.05%；Trimming refers to steel
Water, by feeding MnN lines, the too low N content of adjustment converter tapping N content, contains N in molten steel after VD depth applications of vacuum
Amount is stable in the range of 45-95ppm.
As currently preferred technical scheme, step (1) described double slag process is that molten iron and steel scrap blow for the first time
Deslagging after 2~10min of refining, again blanking carry out second of 5~15min of blowing.
Wherein, for the first time blowing time can be 2min, 3min, 4min, 5min, 6min, 7min, 8min, 9min or
10min etc., time of second blowing can be 5min, 6min, 7min, 8min, 9min, 10min, 11min, 12min,
13min, 14min or 15min etc., it is not limited to cited numerical value, other interior unrequited numbers of above-mentioned each number range
It is worth equally applicable.
Preferably, slide plate pushing off the slag is used in step (1) and stays steel tapping steel.
As currently preferred technical scheme, lime and dolomite are added before step (2) the pre- desulfurization.
As currently preferred technical scheme, step (2) is blown using oxygen rifle.
Preferably, the blowing pressure of the oxygen rifle is 0.5~1MPa, as 0.5MPa, 0.6MPa, 0.7MPa, 0.8MPa,
0.9MPa or 1MPa etc., it is not limited to cited numerical value, other interior unrequited numerical value of the number range are equally applicable.
Preferably, the blowing rifle position is 0.8~1.5m, such as 0.8m, 0.9m, 1.0m, 1.1m, 1.2m, 1.3m, 1.4m or
1.5m etc., it is not limited to cited numerical value, other interior unrequited numerical value of the number range are equally applicable.
As currently preferred technical scheme, lime and SiC are added in step (3) described LF refining.
High carbon ferro-chrome is added as currently preferred technical scheme, in step (3) described LF refining and controls Cr matter
Fraction is measured 0.15~0.20%.
As currently preferred technical scheme, step (4) the VD degassings are deaerated using double.
Preferably, deep vacuum≤67pa during step (4) VD degassings, as 5pa, 10pa, 15pa, 20pa, 25pa,
30pa, 35pa, 40pa, 45pa, 50pa, 55pa, 60pa, 65pa or 67pa etc., it is not limited to cited numerical value, the number
Other unrequited numerical value are equally applicable in the range of value.
Preferably, vacuum time >=15min during step (4) VD degassings, as 15min, 20min, 25min,
30min, 35min, 40min, 45min, 50min, 55min, 60min, 90min or 120min etc., it is not limited to cited
Numerical value, other unrequited numerical value are equally applicable in the number range.
As currently preferred technical scheme, step (4) the broken empty line feeding is hello MnN lines after broken sky.
In the preparation method of air bottle steel of the present invention Mo and V element usually from molten steel residual elements, wherein working as iron
In water during V element deficiency, slightly added in tapping using vanadium piece.
Compared with prior art, the present invention at least has the advantages that：
(1) present invention provides a kind of normalizing state manganese systems air bottle steel, and the continuous casting billet of the air bottle steel is after being rolled into pipe, normalizing
State fully meets existing gas cylinder standard, average yield strength >=550MPa, ballistic work >=35J；
(2) present invention provides a kind of normalizing state manganese systems air bottle steel, and Cr, Mo, V, N element are added in the air bottle steel, although
Cause steel billet cost increase, but can be follow-up saving Tempering and Quenching about 600 yuan/ton of steel of process cost；
(3) present invention provides a kind of preparation method of normalizing state manganese systems air bottle steel, the Molten Steel Cleanliness of the preparation method
Higher, converter uses half smelting molten steel, the double sliding pushing off the slag of tapping slide plate, avoids slag, high alumina refining slag system is used in refining process,
Control steel inclusion and P, S content.
Embodiment
For ease of understanding the present invention, it is as follows that the present invention enumerates embodiment.Those skilled in the art are it will be clearly understood that the implementation
Example is only to aid in understanding the present invention, is not construed as the concrete restriction to the present invention.
Embodiment 1
A kind of preparation method of normalizing state manganese systems air bottle steel, the preparation method comprise the following steps：
(1) double slag process is used to molten iron and steel scrap, deslagging after the 4min that blows for the first time, again blanking carries out second of blowing
8min carries out dephosphorization, obtains dephosphorization molten steel；
(2) the dephosphorization molten steel obtained to step (1) carries out pre- desulfurization of blowing, and lime 1t, light dolomite are added before desulfurization
0.5t, using oxygen rifle pressure 0.8MPa, blowing rifle position 1.2m is blown, it is ensured that desulfurization degree reaches 30~40%, uses afterwards
Low catch carbon simultaneously carries out composition initial adjustment, molten steel after being blown；
(3) molten steel carries out LF refining after the blowing obtained to step (2), and one-time electrode adds lime, each 50kg of SiC, made
Refined with third gear electric current, three sub-electrode desulfurization and deoxidation simultaneously carry out trimming, and high carbon ferro-chrome is added in refining and controls Cr's
Mass fraction is 0.15~0.20%, molten steel after being refined；
(4) molten steel carries out VD degassings after the refining obtained to step (3), is de-gassed using the VD of double, deep vacuum
Spend and ensure vacuum time 30min under 60pa, feed MnN lines after breaking sky, it is 40~100ppm to control N content, and continuous casting obtains the gas
Bottle steel.
Embodiment 2
A kind of preparation method of normalizing state manganese systems air bottle steel, the preparation method comprise the following steps：
(1) double slag process is used to molten iron and steel scrap, deslagging after the 2min that blows for the first time, again blanking carries out second of blowing
15min carries out dephosphorization, obtains dephosphorization molten steel；
(2) the dephosphorization molten steel obtained to step (1) carries out pre- desulfurization of blowing, and lime 1t, light dolomite are added before desulfurization
0.5t, using oxygen rifle pressure 0.5MPa, blowing rifle position 1.5m is blown, it is ensured that desulfurization degree reaches 30~40%, uses afterwards
Low catch carbon simultaneously carries out composition initial adjustment, molten steel after being blown；
(3) molten steel carries out LF refining after the blowing obtained to step (2), and one-time electrode adds lime, each 50kg of SiC, made
Refined with third gear electric current, three sub-electrode desulfurization and deoxidation simultaneously carry out trimming, and high carbon ferro-chrome is added in refining and controls Cr's
Mass fraction is 0.15~0.20%, molten steel after being refined；
(4) molten steel carries out VD degassings after the refining obtained to step (3), is de-gassed using the VD of double, deep vacuum
Spend and ensure vacuum time 60min under 67pa, feed MnN lines after breaking sky, it is 40~100ppm to control N content, and continuous casting obtains the gas
Bottle steel.
Embodiment 3
A kind of preparation method of normalizing state manganese systems air bottle steel, the preparation method comprise the following steps：
(1) double slag process is used to molten iron and steel scrap, deslagging after the 10min that blows for the first time, again blanking is blown for the second time
Refine 5min and carry out dephosphorization, obtain dephosphorization molten steel；
(2) the dephosphorization molten steel obtained to step (1) carries out pre- desulfurization of blowing, and lime 1t, light dolomite are added before desulfurization
0.5t, using oxygen rifle pressure 1MPa, blowing rifle position 0.8m is blown, it is ensured that desulfurization degree reaches 30~40%, afterwards using low
Catch carbon simultaneously carries out composition initial adjustment, molten steel after being blown；
(3) molten steel carries out LF refining after the blowing obtained to step (2), and one-time electrode adds lime, each 50kg of SiC, made
Refined with third gear electric current, three sub-electrode desulfurization and deoxidation simultaneously carry out trimming, and high carbon ferro-chrome is added in refining and controls Cr's
Mass fraction is 0.15~0.20%, molten steel after being refined；
(4) molten steel carries out VD degassings after the refining obtained to step (3), is de-gassed using the VD of double, deep vacuum
Spend and ensure vacuum time 15min under 30pa, feed MnN lines after breaking sky, it is 40~100ppm to control N content, and continuous casting obtains the gas
Bottle steel.
Embodiment 4
One kind uses preparation method described in embodiment 1, the normalizing state manganese systems air bottle steel being prepared, according to mass percent
Counting the composition of the air bottle steel includes：C 0.36%, Si 0.17%, Mn 1.55%, Cr 0.25%, Mo 0.05%, V
0.05%, S 0.001%, P0.015%, N 40ppm, surplus Fe.
Embodiment 5
One kind uses preparation method described in embodiment 1, the normalizing state manganese systems air bottle steel being prepared, according to mass percent
Counting the composition of the air bottle steel includes：C 0.40%, Si 0.37%, Mn 1.70%, Cr 0.10%, Mo 0.10%, V
0.01%, S 0.005%, P 0.010%, N 100ppm, surplus Fe.
Embodiment 6
One kind uses preparation method described in embodiment 1, the normalizing state manganese systems air bottle steel being prepared, according to mass percent
Counting the composition of the air bottle steel includes：C 0.37%, Si 0.30%, Mn 1.63%, Cr 0.18%, Mo 0.05%, V
0.03%, S 0.001%, P 0.013%, N 60ppm, surplus Fe.
Embodiment 7
One kind uses preparation method described in embodiment 1, the normalizing state manganese systems air bottle steel being prepared, according to mass percent
Counting the composition of the air bottle steel includes：C 0.38%, Si 0.24%, Mn 1.68%, Cr 0.10%, Mo 0.08%, V
0.01%, S 0.003%, P 0.010%, N 90ppm, surplus Fe.
Embodiment 8
One kind uses preparation method described in embodiment 1, the normalizing state manganese systems air bottle steel being prepared, according to mass percent
Counting the composition of the air bottle steel includes：C 0.375%, Si 0.27%, Mn 1.65%, Cr 0.15%, Mo 0.06%, V
0.02%, S 0.002%, P 0.012%, N 80ppm, surplus Fe.
Comparative example 1
One kind uses preparation method described in embodiment 1, the normalizing state manganese systems air bottle steel being prepared, according to mass percent
The composition of the air bottle steel is counted in addition to not adding Cr, other conditions are same as Example 8.
Comparative example 2
One kind uses preparation method described in embodiment 1, the normalizing state manganese systems air bottle steel being prepared, according to mass percent
The composition of the air bottle steel is counted in addition to Cr 0.50%, other conditions are same as Example 8.
Comparative example 3
One kind uses preparation method described in embodiment 1, the normalizing state manganese systems air bottle steel being prepared, according to mass percent
The composition of the air bottle steel is counted in addition to N 10ppm, other conditions are same as Example 8.
Comparative example 4
One kind uses preparation method described in embodiment 1, the normalizing state manganese systems air bottle steel being prepared, according to mass percent
The composition of the air bottle steel is counted in addition to N 200ppm, other conditions are same as Example 8.
Comparative example 5
One kind uses preparation method described in embodiment 1, the normalizing state manganese systems air bottle steel being prepared, according to mass percent
The composition of the air bottle steel is counted in addition to not adding Mo, other conditions are same as Example 8.
Comparative example 6
One kind uses preparation method described in embodiment 1, the normalizing state manganese systems air bottle steel being prepared, according to mass percent
The composition of the air bottle steel is counted in addition to Mo 0.20%, other conditions are same as Example 8.
Comparative example 7
One kind uses preparation method described in embodiment 1, the normalizing state manganese systems air bottle steel being prepared, according to mass percent
The composition of the air bottle steel is counted in addition to not adding V, other conditions are same as Example 8.
Comparative example 8
One kind uses preparation method described in embodiment 1, the normalizing state manganese systems air bottle steel being prepared, according to mass percent
The composition of the air bottle steel is counted in addition to V 0.10%, other conditions are same as Example 8.
The obtained air bottle steel tandem rolling of embodiment 4-8 and comparative example 1-8 is pierced into seamless steel pipe, the specification of steel pipe is：φ
219mm × 6.4mm × 9m, the tensile strength, yield strength and impact absorbing energy of steel pipe are tested, as a result such as the institute of table 1
Show.
Table 1
According to table 1 it can be seen that the obtained air bottle steel tandem rollings of the embodiment 4-8 tensile strength that pierces seamless steel pipe is reachable
792MPa, yield strength is up to 581MPa, and ballistic work is up to 57J.Comparative example 1 does not add Cr, under the yield strength for causing steel pipe
Drop, and comparative example 2 adds excessive Cr, causes the impact absorbing energy of steel pipe to decline.N content is 10ppm in comparative example 3,
The impact absorbing energy of steel pipe is caused to decline, and N content is 200ppm in comparative example 4, causes the tensile strength of steel pipe to decline.It is right
Ratio 5 does not add Mo, causes the comprehensive decline of mechanical performance of steel pipe, and Mo content is 0.20wt% in comparative example 6, is caused
The impact absorbing energy of steel pipe declines.Comparative example 7 does not add V, causes the impact absorbing energy of steel pipe to decline, V content in comparative example 8
For 0.10wt%, the yield strength of steel pipe is caused to decline.
Applicant states that the present invention illustrates the detailed process equipment of the present invention and technological process by above-described embodiment,
But the invention is not limited in above-mentioned detailed process equipment and technological process, that is, it is above-mentioned detailed not mean that the present invention has to rely on
Process equipment and technological process could be implemented.Person of ordinary skill in the field it will be clearly understood that any improvement in the present invention,
The addition of equivalence replacement and auxiliary element to each raw material of product of the present invention, selection of concrete mode etc., all fall within the present invention's
Within the scope of protection domain and disclosure.
Claims (10)
1. a kind of normalizing state manganese systems air bottle steel, it is characterised in that the composition according to air bottle steel described in mass percent meter includes：C
0.36~0.40%, Si 0.17~0.37%, Mn 1.55~1.70%, Cr≤0.25%, Mo≤0.10%, V≤0.05%,
S≤0.005%, P≤0.015%, N 40~100ppm, surplus Fe.
2. air bottle steel according to claim 1, it is characterised in that according to the composition bag of air bottle steel described in mass percent meter
Include：C 0.37~0.38%, Si 0.24~0.30%, Mn 1.63~1.68%, Cr 0.10~0.18%, Mo≤0.08%,
V≤0.03%, S≤0.003%, P≤0.013%, N 60~90ppm, surplus Fe.
3. a kind of preparation method of the air bottle steel of claim 1 or 2, it is characterised in that the preparation method includes following step
Suddenly：
(1) to molten iron and steel scrap, converter smelting dephosphorization is carried out using double slag process；
(2) while to molten steel carry out pre- desulfurization of blowing, it is ensured that desulfurization degree reaches 30~40%, afterwards using low catch carbon and carry out into
Divide initial adjustment, molten steel after being blown；
(3) molten steel carries out LF refining, desulfurization and deoxidation and carries out trimming after the blowing obtained to step (2), is refined
Molten steel afterwards；
(4) molten steel carries out VD degassings after the refining obtained to step (3), breaks line feeding after sky, and it is 40~100ppm to control N content,
Continuous casting obtains the air bottle steel base.
4. preparation method according to claim 3, it is characterised in that step (1) described double slag process is to molten iron and steel scrap
Deslagging after 2~10min of progress first time blowing, again blanking carry out second of 5~15min that blows；
Preferably, slide plate pushing off the slag is used in step (1) and stays steel tapping steel.
5. the preparation method according to claim 3 or 4, it is characterised in that before step (2) the pre- desulfurization add lime and
Dolomite.
6. according to the preparation method described in any one of claim 3~5, it is characterised in that step (2) is blown using oxygen rifle
Refining；
Preferably, the blowing pressure of the oxygen rifle is 0.5~1MPa；
Preferably, the blowing rifle position is 0.8~1.5m.
7. according to the preparation method described in any one of claim 3~6, it is characterised in that added in step (3) described LF refining
Lime and SiC.
8. according to the preparation method described in any one of claim 3~7, it is characterised in that added in step (3) described LF refining
High carbon ferro-chrome simultaneously controls Cr mass fraction 0.15~0.20%.
9. according to the preparation method described in any one of claim 3~8, it is characterised in that step (4) the VD degassings are using double
Station deaerates；
Preferably, deep vacuum≤67pa when step (4) VD deaerates；
Preferably, vacuum time >=15min when step (4) VD deaerates.
10. according to the preparation method described in any one of claim 3~9, it is characterised in that step (4) the broken empty line feeding is
MnN lines are fed after broken sky.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109457168A (en) * | 2018-12-24 | 2019-03-12 | 宁波颂杰电器有限公司 | Household gas range fuel gas conduit alloy and preparation method thereof and fuel gas conduit |
| CN111534742A (en) * | 2020-04-30 | 2020-08-14 | 天津钢管制造有限公司 | Pipe blank for preventing internal cracks of steel pipe blank of gas cylinder, manufacturing method and application |
| CN113652604A (en) * | 2021-07-09 | 2021-11-16 | 包头钢铁（集团）有限责任公司 | Preparation method of high-hardenability hot-rolled round steel for engineering machinery |
| CN115717216A (en) * | 2022-11-21 | 2023-02-28 | 南京钢铁股份有限公司 | Steel continuous casting round billet for gas cylinder pipe and manufacturing method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034761A (en) * | 1988-02-06 | 1989-08-16 | 冶金工业部攀枝花钢铁公司 | Steel alloy for high-pressure tank |
| CN101086203A (en) * | 2007-07-19 | 2007-12-12 | 天津钢铁有限公司 | Method for producing continuous casting round billet for petroleum bush using convertor process |
| CN105256235A (en) * | 2015-11-19 | 2016-01-20 | 攀钢集团西昌钢钒有限公司 | High-pressure gas cylinder steel and method for removing scale on surface of high-pressure gas cylinder steel |
| CN105331885A (en) * | 2015-10-09 | 2016-02-17 | 天津钢铁集团有限公司 | Production method of 37 Mn round billets for air cylinders |
-
2017
- 2017-11-01 CN CN201711059940.8A patent/CN107747041B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034761A (en) * | 1988-02-06 | 1989-08-16 | 冶金工业部攀枝花钢铁公司 | Steel alloy for high-pressure tank |
| CN101086203A (en) * | 2007-07-19 | 2007-12-12 | 天津钢铁有限公司 | Method for producing continuous casting round billet for petroleum bush using convertor process |
| CN105331885A (en) * | 2015-10-09 | 2016-02-17 | 天津钢铁集团有限公司 | Production method of 37 Mn round billets for air cylinders |
| CN105256235A (en) * | 2015-11-19 | 2016-01-20 | 攀钢集团西昌钢钒有限公司 | High-pressure gas cylinder steel and method for removing scale on surface of high-pressure gas cylinder steel |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109457168A (en) * | 2018-12-24 | 2019-03-12 | 宁波颂杰电器有限公司 | Household gas range fuel gas conduit alloy and preparation method thereof and fuel gas conduit |
| CN109457168B (en) * | 2018-12-24 | 2021-07-06 | 宁波正直科技有限公司 | Gas pipe alloy of household gas stove, preparation method thereof and gas pipe |
| CN111534742A (en) * | 2020-04-30 | 2020-08-14 | 天津钢管制造有限公司 | Pipe blank for preventing internal cracks of steel pipe blank of gas cylinder, manufacturing method and application |
| CN113652604A (en) * | 2021-07-09 | 2021-11-16 | 包头钢铁（集团）有限责任公司 | Preparation method of high-hardenability hot-rolled round steel for engineering machinery |
| CN115717216A (en) * | 2022-11-21 | 2023-02-28 | 南京钢铁股份有限公司 | Steel continuous casting round billet for gas cylinder pipe and manufacturing method thereof |
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| CN107747041B (en) | 2020-03-03 |
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