CN108707828A - A kind of super high impact toughness, high cleanliness steel for low-temperature pressure container and its production method - Google Patents
A kind of super high impact toughness, high cleanliness steel for low-temperature pressure container and its production method Download PDFInfo
- Publication number
- CN108707828A CN108707828A CN201810642103.6A CN201810642103A CN108707828A CN 108707828 A CN108707828 A CN 108707828A CN 201810642103 A CN201810642103 A CN 201810642103A CN 108707828 A CN108707828 A CN 108707828A
- Authority
- CN
- China
- Prior art keywords
- steel
- low
- pressure container
- impact toughness
- temperature pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- 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
- C21C7/0006—Adding metallic additives
-
- 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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- 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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
-
- 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
-
- 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
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a kind of super high impact toughness, high cleanliness steel for low-temperature pressure container, chemical composition mass percent is：C：0.06-0.08%, Si：0.20-0.35%, Mn：1.15-1.35%, Ti：0.01-0.02%, Ni：0.12-0.15%, Al：The , of 0.020-0.045%, P≤0.010%, S≤0.003% [O]≤ 0.0015% , [N]≤ 0.0050% , [H]≤ 0.00015%, surplus Fe.Known to from the above, a kind of super high impact toughness, high cleanliness steel for low-temperature pressure container and its production method of the present invention, by accurately controlling reduction C content, strong deoxidation, crystal grain thinning are carried out using Al, alloying is carried out using Ni, Ti element, so that its performance is had and is applicable in lower medium temperature compared with 09MnD steel in Q/TDGG 0040-2004（-50℃~-55℃）With higher low-temperature impact toughness, and its overall mechanical properties is also more stable.
Description
Technical field
The present invention relates to the technical fields of the low-alloy steel in steel industry, and in particular to a kind of super high impact toughness, height
Degree of purity steel for low-temperature pressure container and its production method.
Background technology
Low-temperature pressure container is one kind in low-temperature (low temperature) vessel.The common ferritic steel of general pressure vessel, when temperature reduces
When to a certain temperature, reach brittle transition temperature, the toughness of steel drastically declines, easily broken.Pressure vessel is less than transformation temperature
In use, as there are the stress raisers caused by the factors such as defect, residual stress in container under conditions of degree, container is just very
May the non-plastic fracture in the case where not having to occur apparent plastic deformation, to lead to catastrophic failure.
For low-temperature pressure container, first have to select suitable material, these materials necessary according to purposes and bearing medium
There is good toughness at use temperature accordingly.The low-alloy handled through crystal grain thinning can be used in -45 DEG C or more media
Steel, -45 DEG C ~ -60 DEG C media can be used the steel of nickel content 2.5%, -60 DEG C ~ -104 DEG C media that the steel of nickel content 3.5% can be used, -
The steel of nickel content 9.0% can be used in 104 DEG C ~ -196 DEG C media, and austenitic stainless steel or aluminium can be used to close for less than -196 DEG C media
Gold.For avoid low-temperature pressure container generate stress raisers, answer close inspection during fabrication, it is dangerous in container to prevent
Defect.Therefore the necessary stringent control of low-temperature pressure container manufacture overall process, must be strictly controlled since raw material and produced
Journey is continuously improved purity of steel, prevents inside and outside defect.
Steel for low-temperature pressure container impact flexibility is advised in China's industry internal standard Q/TDGG 0040-2004
It is fixed（The standard analysis of 09MnD steel is as shown in Figure 1）, -50 DEG C of impact flexibility requirements of middle-low alloy steel：KV2≥60J.State at present
The 09MnD steel inside generally used, it is difficult to stably reach above-mentioned obdurability requirement, can only ensure -45 DEG C after normalized treatment
Safe handling, to ensure that pressure vessel is used safely at -50 DEG C -55 DEG C, it is necessary to redesign ingredient and Optimal improvements technique.
Invention content
It is an object of the invention to：Overcome the deficiencies of the prior art and provide a kind of super high impact toughness, high cleanliness low temperature
Steels for pressure vessel use and its production method have compared with the higher low-temperature impact toughness of 09MnD steel in Q/TDGG 0040-2004.Tool
There is following mechanical property：-50℃ KV2≥250J.
The technical solution used in the present invention is：
A kind of super high impact toughness, high cleanliness steel for low-temperature pressure container, chemical composition mass percent are：C：0.06-
0.08%, Si：0.20-0.35%, Mn：1.15-1.35%, Ti：0.01-0.02%, Ni：0.12-0.15%, Al：0.020-
The , of 0.045%, P≤0.010%, S≤0.003% [O]≤ 0.0015% , [N]≤ 0.0050% , [H]≤ 0.00015%, surplus Fe.
The restriction of super high impact toughness, high cleanliness steel for low-temperature pressure container chemical composition of the present invention is specifically described below
Reason：
C：The intensity of steel can be significantly improved, but also deteriorates the plasticity of steel, significantly improves the brittle transition temperature of steel.So to protect
It demonstrate,proves this steel grade and has good low-temperature impact toughness, prevent peritectic reaction, endanger surface quality of steel, carbon content should control
0.08% or less.C content of the present invention takes 0.06%-0.08%.
Si：Ferrite can be dissolved in steel, can be improved the intensity and hardness of steel, but be reduced the plasticity and toughness of steel.Its
Minimum content can be only achieved effect for 0.18%, but excessively high Si contents easily cause steel when especially being coexisted with Mn elements
Grain coarsening increases steel belt roof bolt brittleness, while Si is to significantly improve one of brittle transition temperature element of steel.Compound material
Si contents are determined as 0.20%-0.35% by general requirement, this steel grade.
Mn：Ferrite can be dissolved in steel, strengthens matrix, and pearlite can be refined in roller repairing and opposite can improve pearl
Therefore body of light content can improve intensity and hardness, and influenced on the plasticity of material smaller.When Mn contents are less than 1.8%, with
Its content increases, and steel strength is continuously increased, and does not have notable harm to toughness.The general requirement of compound material, this steel grade
Mn contents are determined as 1.15%-1.35%.
Ni：The intensity of steel can be improved, while keeping good plasticity and toughness.Certain nickel has soda acid higher resistance to
Corrosive power.Nickel can reduce critical transition temperature and reduce the diffusion velocity of each element, significantly improve the low-temperature impact of steel
Toughness.It is expensive but since nickel is scarce resource.So the control of Ni contents is in 0.12%-0.15% in the present invention.
Ti：Carbide is combined in steel with carbon, is formed carbonization titanium particulate, be can effectively prevent crystal grain and grow up.
While improving intensity, through normalizing can abundant crystal grain thinning, so that the plasticity of steel and impact flexibility is significantly improved.But
Ti is combined the bulky grain TiN brittle inclusions easily formed with N element in steel, seriously affects the impact flexibility of steel.So of the invention
Middle Ti contents control is 0.01%-0.02%.
Al：The inoxidizability of steel is improved, gas content in steel is reduced, improves the fatigue strength of steel, while brilliant as refinement
Grain element is present in steel grade, plays the role of the cryogenic property and corrosion resisting property that improve steel.But if Al content is excessively high, it is easy shape
At hard Al2O3It is mingled with, deteriorates the impact flexibility of steel.So the present invention defines specific Composition Control ranging to Al content
0.020%-0.045%。
P：So that steel is generated cold brittleness, reduce the impact flexibility of steel, while deteriorating the welding performance of steel, reduces plasticity, make cold
Curved degradation.So the present invention has carried out stringent control to P content, it is necessary to≤0.010%.
S：Easy segregation element reduces the ductility and toughness of steel, is also adversely affected to welding performance and corrosion resistance.Institute
Stringent control is carried out to S contents with the present invention, it is necessary to≤0.003%.
O：It is little to the intensity effect of steel in room temperature, but the elongation of steel and reduction of area is made significantly to reduce, relatively low
When temperature and extremely low O content, the intensity and plasticity of material are drastically reduced with the increase of O content.In terms of impact property, with
The maximum value of the increase impact of O content continuously decreases, and brittle transition temperature but soon increases, the range of brittle transition temperature
With broadening.Meanwhile with the increase of O content, the oxide inclusion occurrence probability of material greatly increases, to reduce material
Fatigue life.The present invention is by O content stability contorting within 0.0015%.
H：Hydrogen makes the plasticity of steel reduce, and mainly low-temperature impact work is made to reduce.Hydrogen will produce " hairline " or be formed in steel
Stressed zone, when steel carries out forging rolling processing, hairline extends and forms crackle, so that the mechanical property especially plasticity of steel is deteriorated, even
" white point " is presented on steel fracture in fracture.Hydrogen can also cause splitting in spot segregation, hydrogen embrittlement and weld heat-affected zone simultaneously
Seam etc..Therefore, the present invention and technique control H below 0.00015%.
N：Nitrogen can be such that steel strengthen, but significantly reduce steel plasticity, toughness, increase timeliness tendency and cold brittleness.Generally want
Content is asked to be less than 0.0080%.The present invention and production technology control N content within 0.0050%.
A kind of super high impact toughness, the production method of high cleanliness steel for low-temperature pressure container, include the following steps：By upper
The mass percent of component is stated,
1）Converter smelting：It smelts in 100 tons or more of top and bottom complex blowing formula converter, is carried out just as raw material using molten iron and high-quality steel scrap
Refining realizes that pre- de- P, tapping are added lab-prepared refining slag, double deoxidizer and a variety of high purity alloys and carry out pre-deoxidation and ingredient initial adjustment；
2）Refining：Molten steel deep deoxidation and alloying are carried out in 100 tons or more of LF stoves；Refining process whole process stirs, after refining
Phase uses weak stirring, prevents secondary oxidation of steel；
3）Vacuum outgas：Vacuum outgas and removal of inclusions processing are carried out using RH circulating degasification apparatus after LF refining；
4）Inclusion modification and soft blow：Silico-calcium silk thread is fed after being vacuum-treated to inclusion modification and carries out soft blow processing, soft blow
Time is 30-35 minutes, is fully floated, removal of inclusions；
5）Continuous casting：Whole full guard casting life is carried out using tundish covering flux, crystallizer protecting residue using billet caster
Produce continuous casting square billet；
6）Steel rolling：Production line of bar produces Φ 50mm ~ Φ 70mm steel for low-temperature pressure container in utilization；
7）Finishing：Steel surface defect is eliminated using the finishing process of ball blast+chamfered edge+hand inspection reconditioning.
The further improvement project of the present invention is the step 1）The anti-non-return P of steel tapping is stayed using slide plate pushing off the slag.
The further improvement project of the present invention is the step 2）The refining slag for making basicity slag R=5 ~ 8, passes through slag-metal reaction
Strengthen and takes off S, goes to be mingled with.
The further improvement project of the present invention is the step 2）In, the Ventilation Rate of the weak stirring is less than 200L/
min。
The further improvement project of the present invention is the step 3）In, kept for 30 minutes under a high vacuum or more, ensure
H ]≤0.00015%, [ O ]≤0.0010%, all the components enter the range of requirement.
The further improvement project of the present invention is the step 6）In, using 1050 ~ 1080 DEG C of open rollings, 980 ~ 1000 DEG C
Finish to gauge temperature-controlled rolling fully refines original grain degree.
According to present invention manufacture super high impact toughness, high cleanliness steel for low-temperature pressure container（07MnNiTi）, have super
High/low-temperature impact toughness and high cleanliness, material mechanical property after whole normalizing can reach following level：-50℃
KV2≥250J。
The beneficial effects of the present invention are：
The first, a kind of super high impact toughness, high cleanliness steel for low-temperature pressure container and its production method of the invention, passes through essence
Really control reduces C content, and strong deoxidation, crystal grain thinning are carried out using Al, carries out alloying using Ni, Ti element, its performance is made to have
Have and is applicable in lower medium temperature compared with 09MnD steel in Q/TDGG 0040-2004（-50℃~-55℃）With higher low-temperature impact
Toughness, and its overall mechanical properties is also more stable.
The second, a kind of super high impact toughness, high cleanliness steel for low-temperature pressure container and its production method of the invention, makes
With calcium containing alloy carry out strong deoxidation, special refining slag system enhancing removal be mingled with effect, be de-gassed using RH vacuum equipments,
The cleanliness factor for improving material, to improve the safety of material.
A kind of super high impact toughness, high cleanliness steel for low-temperature pressure container and its production method of third, the present invention, this
Invention uses BOF+LF+RH+CCM techniques, ensures lower P, S, H, O, N content, and material is made to have excellent synthesis mechanical property
Energy.
4th, a kind of super high impact toughness, high cleanliness steel for low-temperature pressure container and its production method of the invention, this
Invention gives full play to the work of Ti element crystal grain thinnings by using 1050 ~ 1080 DEG C of open rollings, 980 ~ 1000 DEG C of finish to gauge temperature-controlled rollings
With raising material comprehensive mechanical property.
5th, a kind of super high impact toughness, high cleanliness steel for low-temperature pressure container and its production method of the invention, this
Invention meets the requirement of -50 DEG C ~ -55 DEG C of low-alloy steel by Rational Composition design and advanced technique, effectively reduces
The consumption of nickel alloy, is greatly saved cost, improves efficiency.
Description of the drawings
Fig. 1 is the standard analysis table of 09MnD steel.
Fig. 2 is that the low-alloy steel for low-temperature pressure container 09MnD that the current country uses and the chemical composition of the present invention compare
Table.
Fig. 3 is the chemical composition contrast table of 4 groups of embodiments.
Fig. 4 is that impact absorbing energy of 4 groups of embodiments with 09MnD steel at -50 DEG C, -52 DEG C and -55 DEG C compares
Table.
Fig. 5 is 4 groups of embodiment non-metallic inclusion controlled level tables.
Specific implementation mode
As shown in Fig. 2, the comparative situation of the chemical constituent and 09MnD steel chemical constituents of the present invention.
And prepare 4 groups of embodiments according to production in accordance with the following methods：
1）Converter smelting：It smelts in 100 tons or more of top and bottom complex blowing formula converter, is carried out just as raw material using molten iron and high-quality steel scrap
Refining realizes that pre- de- P, tapping are added lab-prepared refining slag, double deoxidizer and a variety of high purity alloys and carry out pre-deoxidation and ingredient initial adjustment,
The anti-non-return P of steel tapping is stayed using slide plate pushing off the slag；
2）Refining：Molten steel deep deoxidation and alloying are carried out in 100 tons or more of LF stoves, makes the refining slag of basicity slag R=5 ~ 8, are led to
Cross the de- S of slag-metal reaction reinforcing, removal is mingled with；Refining process whole process stirs, and the refining later stage uses weak stirring, prevents the secondary oxygen of molten steel
Change；
3）Vacuum outgas：Vacuum outgas and removal of inclusions processing are carried out using RH circulating degasification apparatus after LF refining, in height
It is kept for 30 minutes or more under vacuum, ensures that [ H ]≤0.00015%, [ O ]≤0.0010%, all the components enter the range of requirement；
4）Inclusion modification and soft blow：Silico-calcium silk thread is fed after being vacuum-treated to inclusion modification and carries out soft blow processing, soft blow
Time is 30-35 minutes, is fully floated, removal of inclusions；
5）Continuous casting：Whole full guard casting life is carried out using tundish covering flux, crystallizer protecting residue using billet caster
Produce continuous casting square billet；
6）Steel rolling：Production line of bar produces Φ 50mm ~ Φ 70mm steel for low-temperature pressure container in utilization, using 1050 ~ 1080 DEG C
Open rolling, 980 ~ 1000 DEG C of finish to gauge temperature-controlled rollings fully refine original grain degree；
7）Finishing：Steel surface defect is eliminated using the finishing process of ball blast+chamfered edge+hand inspection reconditioning.
The process conditions limited is not added to can refer to this field routine techniques in method made above.
As shown in figure 3, the super high impact toughness of each embodiment of gained, high cleanliness steel for low-temperature pressure container
（07MnNiTi）Chemical composition.
As shown in figure 4, impact absorbing energy of each embodiment of gained under the conditions of -50 DEG C, -52 DEG C and -55 DEG C and with it is existing
There is the comparative situation of technology.
As shown in figure 5, the non-metallic inclusion controlled level comparative situation of each embodiment of gained.
General superfine high-quality steel non-metallic inclusion control hierarchy be each system≤1.5 grades, and the present invention pass through it is rational
Technological design and process control, non-metallic inclusion stability contorting at 1.0 grades hereinafter, purity of steel is high；Moreover, wherein
C is thick and C is carefully 0 grade.
Claims (7)
1. a kind of super high impact toughness, high cleanliness steel for low-temperature pressure container, it is characterised in that：Its chemical composition quality percentage
Than for：C：0.06 ~ 0.08%, Si：0.20 ~ 0.35%, Mn：1.15 ~ 1.35%, Ti：0.01 ~ 0.02%, Ni：0.12 ~ 0.15%, Al：
The , of 0.020 ~ 0.045%, P≤0.010%, S≤0.003% [O]≤ 0.0015% , [N]≤ 0.0050% , [H]≤ 0.00015%, surplus
For Fe.
2. a kind of super high impact toughness, the method for high cleanliness steel for low-temperature pressure container as described in claim 1 are produced,
It is characterized in that including the following steps：
1）Converter smelting：It smelts in 100 tons or more of top and bottom complex blowing formula converter, is carried out just as raw material using molten iron and high-quality steel scrap
Refining realizes that pre- de- P, tapping are added lab-prepared refining slag, double deoxidizer and a variety of high purity alloys and carry out pre-deoxidation and ingredient initial adjustment；
2）Refining：Molten steel deep deoxidation and alloying, refining process whole process stirring, after refining are carried out in 100 tons or more of LF stoves
Phase uses weak stirring, prevents secondary oxidation of steel；
3）Vacuum outgas：Vacuum outgas and removal of inclusions processing are carried out using RH circulating degasification apparatus after LF refining；
4）Inclusion modification and soft blow：Silico-calcium silk thread is fed after being vacuum-treated to inclusion modification and carries out soft blow processing, soft blow
Time is 30 ~ 35 minutes, is fully floated, removal of inclusions；
5）Continuous casting：Whole full guard casting life is carried out using tundish covering flux, crystallizer protecting residue using billet caster
Produce continuous casting square billet；
6）Steel rolling：Production line of bar produces Φ 50mm ~ Φ 70mm steel for low-temperature pressure container in utilization；
7）Finishing：Steel surface defect is eliminated using the finishing process of ball blast+chamfered edge+hand inspection reconditioning.
3. a kind of super high impact toughness as claimed in claim 2, the production method of high cleanliness steel for low-temperature pressure container,
It is characterized in that：The step 1）In, the anti-non-return P of steel tapping is stayed using slide plate pushing off the slag.
4. a kind of super high impact toughness as claimed in claim 2, the production method of high cleanliness steel for low-temperature pressure container,
It is characterized in that：The step 2）In, the refining slag of basicity slag R=5 ~ 8 is made, de- S is strengthened by slag-metal reaction, removal is mingled with.
5. a kind of super high impact toughness as claimed in claim 2, the production method of high cleanliness steel for low-temperature pressure container,
It is characterized in that：The step 2）In, the Ventilation Rate of the weak stirring is less than 200L/min.
6. a kind of super high impact toughness as claimed in claim 2, the production method of high cleanliness steel for low-temperature pressure container,
It is characterized in that：The step 3）In, kept for 30 minutes or more under a high vacuum, ensure [ H ]≤0.00015%, [ O ]≤
0.0010%, all the components enter the range of requirement.
7. a kind of super high impact toughness as claimed in claim 2, the production method of high cleanliness steel for low-temperature pressure container,
It is characterized in that：The step 6）In, using 1050 ~ 1080 DEG C of open rollings, 980 ~ 1000 DEG C of finish to gauge temperature-controlled rollings, fully refine original
Grain size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810642103.6A CN108707828B (en) | 2018-06-21 | 2018-06-21 | A kind of super high impact toughness, high cleanliness steel for low-temperature pressure container and its production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810642103.6A CN108707828B (en) | 2018-06-21 | 2018-06-21 | A kind of super high impact toughness, high cleanliness steel for low-temperature pressure container and its production method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108707828A true CN108707828A (en) | 2018-10-26 |
| CN108707828B CN108707828B (en) | 2019-09-03 |
Family
ID=63871775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810642103.6A Active CN108707828B (en) | 2018-06-21 | 2018-06-21 | A kind of super high impact toughness, high cleanliness steel for low-temperature pressure container and its production method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108707828B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109680122A (en) * | 2019-02-15 | 2019-04-26 | 江苏利淮钢铁有限公司 | A kind of hub bearing steel and its manufacturing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242309A (en) * | 2011-06-30 | 2011-11-16 | 湖南华菱湘潭钢铁有限公司 | Production method of boron-containing petroleum storage tank steel plate for ultra-high heat input welding |
| CN102251173A (en) * | 2010-05-17 | 2011-11-23 | 宝山钢铁股份有限公司 | High-strength and high-toughness steel plate for low-cost and high linear energy welding |
| CN102418036A (en) * | 2011-06-29 | 2012-04-18 | 南阳汉冶特钢有限公司 | 15MnNiDR low alloy steel plate for low temperature pressure vessel and production method thereof |
| CN102212762B (en) * | 2011-05-09 | 2012-12-19 | 武汉钢铁(集团)公司 | Nuclear container steel with tensile strength of more than 690MPa level and production method |
| CN108004465A (en) * | 2017-11-23 | 2018-05-08 | 南阳汉冶特钢有限公司 | A kind of 130mm thickness low-temperature pressure container 16MnDR steel plates and its production method |
-
2018
- 2018-06-21 CN CN201810642103.6A patent/CN108707828B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251173A (en) * | 2010-05-17 | 2011-11-23 | 宝山钢铁股份有限公司 | High-strength and high-toughness steel plate for low-cost and high linear energy welding |
| CN102212762B (en) * | 2011-05-09 | 2012-12-19 | 武汉钢铁(集团)公司 | Nuclear container steel with tensile strength of more than 690MPa level and production method |
| CN102418036A (en) * | 2011-06-29 | 2012-04-18 | 南阳汉冶特钢有限公司 | 15MnNiDR low alloy steel plate for low temperature pressure vessel and production method thereof |
| CN102242309A (en) * | 2011-06-30 | 2011-11-16 | 湖南华菱湘潭钢铁有限公司 | Production method of boron-containing petroleum storage tank steel plate for ultra-high heat input welding |
| CN108004465A (en) * | 2017-11-23 | 2018-05-08 | 南阳汉冶特钢有限公司 | A kind of 130mm thickness low-temperature pressure container 16MnDR steel plates and its production method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109680122A (en) * | 2019-02-15 | 2019-04-26 | 江苏利淮钢铁有限公司 | A kind of hub bearing steel and its manufacturing method |
| CN109680122B (en) * | 2019-02-15 | 2020-09-22 | 江苏利淮钢铁有限公司 | Steel for hub bearing and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108707828B (en) | 2019-09-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104894487B (en) | High-strength high-toughness steel for valves of oil drilling platforms and technology for manufacturing high-strength high-toughness steel | |
| CN108893681B (en) | High-strength high-toughness pressure vessel steel plate and preparation method thereof | |
| CN111926259B (en) | Low alloy steel for high heat input welding and preparation method thereof | |
| CN112063930B (en) | Rare earth treated low-cost high-toughness low-temperature pressure vessel steel plate and production method thereof | |
| CN111286676A (en) | Production method of high crack-arresting marine steel plate | |
| EP3789508A1 (en) | Yield strength 460 mpa grade hot-rolled high-toughness low-temperature-resistant h-beam and preparation method therefor | |
| CN109797345B (en) | Steel for sulfur-resistant gas cylinder pipe and manufacturing method thereof | |
| CN107937807B (en) | 770 MPa-grade low-welding-crack-sensitivity pressure vessel steel and manufacturing method thereof | |
| CN112626302B (en) | Smelting method of high-cleanliness microalloyed high-strength steel | |
| CN107937805B (en) | Steel sheet for low-temperature pressure vessel and method for producing same | |
| CN107974643B (en) | -70 ℃ normalized high-strength low-yield-ratio pressure vessel steel and manufacturing method thereof | |
| CN113637911B (en) | 800 MPa-grade high heat input resistant welding pressure vessel steel and preparation method thereof | |
| WO2023000479A1 (en) | Hot-rolled, low-temperature-resistant, h-shaped steel with grade of yield strength of 420 mpa, and preparation method therefor | |
| CN108977731B (en) | High-performance corrosion-resistant steel plate for movable pressure container and manufacturing method thereof | |
| CN111411302B (en) | 690 MPa-grade steel for pressure vessel for high heat input welding and manufacturing method thereof | |
| CN108707828B (en) | A kind of super high impact toughness, high cleanliness steel for low-temperature pressure container and its production method | |
| CN109930064B (en) | Corrosion-resistant heat-resistant steel for high-pressure boiler pipe and production method thereof | |
| CN115927952B (en) | 690 MPa-grade hydrogen-induced delayed fracture resistant low-weld crack sensitivity quenched and tempered steel and manufacturing method thereof | |
| CN113151744B (en) | Steel S48C for engineering machinery slewing bearing and production method thereof | |
| CN115418553A (en) | High-corrosion-resistance weathering steel and preparation method thereof | |
| CN117230377B (en) | Steel for new energy electric automobile battery pack support frame and production method thereof | |
| CN112342461B (en) | Titanium-containing gas shield welding wire welding steel and production method thereof | |
| CN111705262B (en) | Magnesium-containing X65 pipeline steel with excellent acid resistance and production method thereof | |
| CN116334505B (en) | 700MPa high-strength structural steel with cold crack sensitivity coefficient smaller than or equal to 0.13, and preparation method and application thereof | |
| CN116949365A (en) | 1000 MPa-level large heat input resistant steel plate for welding hydropower station pressure steel pipe and production method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20181225 Address after: 223002 No. 188 Xi'an South Road, Qingpu District, Huaian City, Jiangsu Province Applicant after: Jiangsu Lihuai Iron and Steel Co., Ltd. Applicant after: Jiangsu Shagang Group Huaigang Special Steel Co.,Ltd. Address before: 223002 No. 188 Xi'an South Road, Qingjiangpu District, Huaian City, Jiangsu Province Applicant before: Jiangsu Shagang Group Huaigang Special Steel Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |