CN115927953A - Steel 07MnMoVR for petroleum storage tank and production method thereof - Google Patents
Steel 07MnMoVR for petroleum storage tank and production method thereof Download PDFInfo
- Publication number
- CN115927953A CN115927953A CN202211347942.8A CN202211347942A CN115927953A CN 115927953 A CN115927953 A CN 115927953A CN 202211347942 A CN202211347942 A CN 202211347942A CN 115927953 A CN115927953 A CN 115927953A
- Authority
- CN
- China
- Prior art keywords
- temperature
- steel plate
- equal
- steel
- straightening
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 94
- 239000010959 steel Substances 0.000 title claims abstract description 94
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 238000003860 storage Methods 0.000 title claims abstract description 14
- 239000003208 petroleum Substances 0.000 title claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 35
- 238000010438 heat treatment Methods 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 21
- 230000008569 process Effects 0.000 claims abstract description 20
- 239000000126 substance Substances 0.000 claims abstract description 6
- 230000009466 transformation Effects 0.000 claims abstract description 5
- 230000032683 aging Effects 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000004321 preservation Methods 0.000 claims description 18
- 230000000630 rising effect Effects 0.000 claims description 9
- 229910001563 bainite Inorganic materials 0.000 claims description 4
- 229910000859 α-Fe Inorganic materials 0.000 claims description 4
- 238000010606 normalization Methods 0.000 claims description 2
- 230000035945 sensitivity Effects 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010791 quenching Methods 0.000 abstract description 5
- 230000000171 quenching effect Effects 0.000 abstract description 5
- 238000005496 tempering Methods 0.000 abstract description 5
- 229910001566 austenite Inorganic materials 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 238000013459 approach Methods 0.000 description 4
- 230000035882 stress Effects 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229910001325 element alloy Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Images
Classifications
-
- 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 belongs to the field of medium plate production, and particularly relates to steel 07MnMoVR for a petroleum storage tank and a production method thereof, wherein the thickness of a steel plate is less than or equal to 60mm, and the steel plate comprises the following chemical components in percentage by mass (unit, wt%): c:0.07-0.09, si:0.15 to 0.25, mn: 1.40-1.50, P is less than or equal to 0.015, S is less than or equal to 0.005, als:0.015 to 0.040, nb:0.025-0.035, cr:0.2-0.3, mo:0.12 to 0.22 percent of Fe, 0.03 to 0.04 percent of V, and the balance of Fe and residual elements; the critical normalizing and intermittent cooling are adopted to replace the conventional quenching and tempering process, the whole process flow is favorably shortened, the production cost is reduced, the same effect after heat treatment is achieved, the 1/4 thickness position and the 1/2 thickness position of the steel plate obtained by the invention can be ensured, the yield strength of the steel plate is more than or equal to 490MPa, the tensile strength is 610-730MPa, the elongation is more than or equal to 17 percent, the transverse impact energy at minus 20 ℃ is more than or equal to 100J, the transverse impact energy at 5 percent of strain aging is more than or equal to 100J at minus 20 ℃, and the NDTT temperature is not lower than minus 40 ℃ at the non-plastic transformation temperature drop hammer NDTT.
Description
Technical Field
The invention belongs to the field of medium plate production, and particularly relates to steel 07MnMoVR for a petroleum storage tank and a production method thereof.
Background
07MnMoVR steel is widely used in trades such as oil, water and electricity pressure line, mainly used preparation spherical tank, low temperature storage tank, pressure line equipment construction such as, and this steel grade also becomes CF steel because of carbon equivalent is lower and Pcm is lower, has many advantages: the large-sized workpiece can be welded in the field without preheating, and has excellent low-temperature toughness and high strength. At present, with the increase of the construction of national oil storage bases and pumped storage projects, the application range of the oil storage bases is expanded, and the demand is increased. Aiming at the steel grade, quenching and tempering heat treatment is conventionally adopted, and the main problems of long production period, high manufacturing cost and no contribution to market competition exist.
Disclosure of Invention
In order to solve the technical defects, the invention aims to provide the steel 07MnMoVR for the petroleum storage tank, which replaces the conventional quenching and tempering heat treatment process after rolling, shortens the production period and reduces the production cost on the premise of ensuring the performance.
The invention also aims to provide a production method of the steel 07MnMoVR for the petroleum storage tank.
To achieve the above object, the present invention is realized by:
the steel plate has the thickness of less than or equal to 60mm and comprises the following chemical components in percentage by mass (unit, wt%): c:0.07-0.09, si:0.15 to 0.25, mn: 1.40-1.50, P is less than or equal to 0.015, S is less than or equal to 0.005, als:0.015 to 0.040, nb:0.025-0.035, cr:0.2-0.3, mo:0.12 to 0.22 percent of Fe, 0.03 to 0.04 percent of V, and the balance of Fe and residual elements;
the steel plate has a structure of ferrite and bainite, a welding crack sensitivity coefficient Pcm is less than or equal to 0.20, a yield strength is more than or equal to 490MPa, a tensile strength is 610-730MPa, an elongation is more than or equal to 17%, a transverse impact energy at the temperature of minus 20 ℃ is more than or equal to 100J in a strain aging of 5%, and a drop hammer NDTT temperature without plastic transformation temperature is not lower than minus 40 ℃.
A production method of steel 07MnMoVR for a petroleum storage tank comprises the following steps: performing off-line heat treatment, critical normalizing, intermittent cooling and straightening;
for the off-line heat treatment critical normalizing process, the steel plate enters an oxidation-free roller hearth type heat treatment furnace for normalizing heat treatment, and comprises a temperature rising section, a heat preservation section I and a heat preservation section II; wherein the temperature of the temperature rising section is controlled at 790-850 ℃, and the temperature rising time is 0.3min/m; the temperature of the heat preservation section I is 870 ℃, and the heating time is 1.3min/mm; the temperature of the heat preservation section II is 900 ℃, and the heating time is 0.3min/mm;
specifically, the off-line heat treatment critical normalizing process is divided into 12 zones, the temperature of the temperature raising section is controlled to be 790-850 ℃, the temperature difference of each zone is 30 ℃, the purpose is to control the steel plate to rapidly enter austenite for transformation, the small difference between the surface temperature and the core temperature of the steel plate is ensured, the condition that the sizes of surface grains and core grains in the thickness direction of the steel plate are not consistent due to large temperature difference is avoided, and the total temperature raising time is 0.3min/mm; the heat preservation section I is arranged from the 4 th area to the 10 th area, the temperature is 870 ℃, the heating time is 1.3min/mm, the temperature is controlled to be 870 ℃ of the steel plate AC3 critical austenite temperature, the grain size of the austenite is about 8.5-9 grade, the temperature control can ensure the minimum expansion amount, the grain size of the austenite is the finest, and the foundation is laid for the subsequent improvement of toughness and strength; the 11 th to 12 th areas are a heat preservation section II, the temperature is 900 ℃, the heating time is 0.3min/mm, the main purpose is to approach the steel discharging section, the surface temperature of the steel plate is promoted to be 900 ℃, the surface temperature of the steel plate after discharging can be ensured to have certain compensation loss, the higher temperature of the inlet water is ensured, favorable conditions are provided for subsequent laminar flow clearance cooling and large supercooling degree, and the method is specifically executed according to the following table 1:
TABLE 1 Critical normalizing temperature trends
In addition, it should be particularly noted that the reasonable matching between the Nb element alloy design and the temperature in the overall design delays the temperature interval and the time interval of austenite increase, accumulates the effect of grain refinement in the critical normalizing process, and ensures that the grains are still in a smaller state while the temperature is increased.
The intermittent cooling process is required, the steel plate after the normalization is cooled by water entering at the roller speed of 30m/min, the water entering temperature is controlled to be 870-890 ℃, the steel plate is subjected to first laminar cooling at the speed of 6-9 ℃/s, and the water outlet temperature is controlled to be 680-700 ℃; stopping for 15s, cooling for the second time at a cooling speed of 3-6 deg.C/s and a temperature of 550-580 deg.C; particularly, intermittent cooling ensures that the steel plate has high yield strength through high water inlet temperature on one hand, and on the other hand, the steel plate is cooled to 680-700 ℃ for the first time, so as to reduce the lamellar spacing of pearlite, ensure that the steel plate has excellent impact toughness, and simultaneously ensure that more bainite structures are not generated due to too low final cooling temperature, after the steel plate is cooled to 680-700 ℃, the steel plate is subjected to secondary cooling after swinging and intermittent for 15s, the intermittent isothermal effect of 15s is mainly used for ensuring that the steel plate uniformly turns red, and the steel plate structure is fully transformed into fine ferrite structures, and after the secondary cooling, the final structures of the steel plate are ferrite and a small amount of bainite, so that the improvement of the toughness is ensured.
The steel plate is quickly straightened after being cooled for the second time according to the straightening process requirements, the straightening temperature is controlled to be 510-520 ℃, the first pass is straightened at the maximum rolling reduction, the straightening is carried out for 3-4 passes, the internal stress is eliminated, and the straightening and hardening effects are achieved; and after the plate shape is leveled, swinging the steel plate on a roller way, and performing 2-pass final correction when the temperature is reduced to the final correction temperature of 400-420 ℃.
The technical scheme adopted by the invention has the beneficial effects that:
the scheme replaces the conventional processes of on-line quenching and tempering or off-line quenching and tempering, is favorable for shortening the whole process flow, reducing the production cost, achieving the same effect after heat treatment, and can ensure that the thickness of the steel plate obtained by the invention is 1/4 and 1/2, the yield strength of the steel plate is more than or equal to 490MPa, the tensile strength is 610-730MPa, the elongation is more than or equal to 17%, the transverse impact energy at-20 ℃ is more than or equal to 100J, the 5% strain aging is more than or equal to 100J, the transverse impact energy at-20 ℃ is more than or equal to 100J, and the NDTT temperature is not lower than-40 ℃ when the NDTT has no plastic transformation temperature and is not lower than drop hammer NDTT.
Drawings
The technical features of the present invention will be further described with reference to the accompanying drawings and embodiments.
FIG. 1 is a schematic view of the simulation point of the off-line heat treatment critical normalizing temperature in the present invention.
FIG. 2 is a schematic view showing a metallographic structure of 200X in a surface layer of a steel sheet of 60mm in thickness according to the present invention.
FIG. 3 is a schematic view showing a metallographic structure of 200X at t/4 of a steel sheet of 60mm in thickness according to the present invention.
FIG. 4 is a schematic view showing a metallographic structure at t/2 of a steel sheet having a thickness of 60mm in the present invention (200X).
Detailed Description
Example 1
1) Designing components: a 07MnMoVR steel plate with a thickness of 60mm was produced, comprising the following chemical components in mass percent (unit, wt%): c:0.07-0.09, si:0.15 to 0.25, mn: 1.40-1.50, P is less than or equal to 0.015, S is less than or equal to 0.005, als:0.015 to 0.040, nb:0.025-0.035, cr:0.2-0.3, mo:0.12 to 0.22 percent of the total weight of the alloy, 0.03 to 0.04 percent of V, and the balance of Fe and residual elements;
2) A critical normalizing process, namely rolling a steel plate with the thickness of 60mm, controlling the temperature of the steel plate entering a temperature rising section to be 790-850 ℃, dividing the temperature rising section into 3 zones, controlling the temperature difference of each zone to be 30 ℃, and controlling the time of the steel plate in the temperature rising section to be 18 minutes;
the steel plate enters a heat preservation section I, namely the temperature from a zone 4 to a zone 10 is controlled according to 870 ℃, the heating time is 1.3min/mm, and the total time of the steel plate in the zone 4 to the zone 10 is 78min;
the temperature of the steel plate in the heat preservation section II, namely the 11 th to 12 th zones is controlled according to 900 ℃, the heating coefficient of the 11 th to 12 th zones is 0.3min/mm, the total time of the steel plate in the 11 th to 12 th zones is 18min, the surface temperature of the steel plate is promoted to approach 900 ℃, and the higher temperature of the water entering is met.
3) And (3) a cooling process: the steel plate enters water rapidly at the roller speed of 30m/min, the water inlet temperature is controlled to be within the range of 883 ℃, the steel plate is subjected to first laminar cooling at the cooling speed of 6-9 ℃/s, and the water outlet temperature of the steel plate is 688 ℃; after the intermission time is 15s, the second cooling is carried out, the cooling speed is controlled according to 3-6 ℃/s, and the final temperature of the steel plate is controlled to be 559 ℃.
4) Straightening strengthening and internal stress eliminating: and (3) quickly straightening the steel plate after secondary cooling, controlling the straightening temperature to be 516 ℃, controlling the straightening pass to be 3 times, airing to be 416 ℃, and then carrying out final straightening for 2 times.
Example 2
1) Designing components: a 07MnMoVR steel plate with a thickness of 30mm was produced, containing the following chemical components in mass percent (unit, wt%): c:0.07-0.09, si:0.15 to 0.25, mn: 1.40-1.50, P is less than or equal to 0.015, S is less than or equal to 0.005, als:0.015 to 0.040, nb:0.025-0.035, cr:0.2-0.3, mo:0.12 to 0.2 percent of the total weight of the alloy, 0.03 to 0.04 percent of V, and the balance of Fe and residual elements;
2) The critical normalizing process comprises rolling a steel plate with a thickness of 30mm, controlling the temperature of the steel plate entering a temperature rising section to be 790-850 ℃, controlling the temperature difference of each section to be 30 ℃, and controlling the time of the steel plate in the temperature rising section to be 9 minutes;
after the steel plate enters the heat preservation section I, namely the temperature of the 4 th area to the 10 th area is 870 ℃, the heating coefficient is 1.3min/mm, the total time of the steel plate in the 4 th area to the 10 th area is 39min, and the temperature is controlled at 870 ℃.
The temperature of the steel plate in the heat preservation section II, namely the 11 th to 12 th zones is controlled according to 900 ℃, the heating coefficient of the 11 th to 12 th zones is 0.3min/mm, the total time of the steel plate in the 11 th to 12 th zones is 9min, the surface temperature of the steel plate is promoted to approach 900 ℃, and the higher temperature of the water entering is met.
3) And (3) a cooling process: the steel plate is rapidly fed with water at the roller speed of 30m/min, the water inlet temperature is controlled to be within the range of 885 ℃, the steel plate is subjected to first laminar cooling at the cooling speed of 6-9 ℃/s, and the water outlet temperature of the steel plate is 682 ℃; after the intermittence time is 15s, the second cooling is carried out, the cooling speed is controlled according to 3-6 ℃/s, and the final temperature of the steel plate is controlled at 561 ℃.
4) Straightening strengthening and internal stress eliminating: and (3) quickly straightening the steel plate after secondary cooling, controlling the straightening temperature to be 511 ℃, controlling the straightening pass to be 3 times, airing to be 415 ℃, and then carrying out final straightening for 2 times.
Example 3
1) Designing components: a07 MnMoVR steel plate with the thickness of 18mm is produced, and comprises the following chemical components in percentage by mass (unit, wt%):
c:0.07-0.09, si:0.15 to 0.25, mn: 1.40-1.50, P is less than or equal to 0.015, S is less than or equal to 0.005, als:0.015 to 0.040, nb:0.025-0.035, cr:0.2-0.3, mo:0.12 to 0.22 percent of Fe, 0.03 to 0.04 percent of V, and the balance of Fe and residual elements;
2) The critical normalizing process comprises rolling 18mm thick steel plate, controlling the temperature of the steel plate in the temperature raising section at 790-850 deg.C, controlling the temperature difference of each section at 30 deg.C, and controlling the time of the steel plate in the temperature raising section at 5.4 min;
the steel plate enters a heat preservation section I, namely the temperature of a zone 4 to a zone 10 is 870 ℃, the heating coefficient is 1.3min/mm, the total time of the steel plate in the zone 4 to the zone 10 is 24in, and the temperature is controlled at 870 ℃.
The steel plate enters a heat preservation section II, namely a region 11-12, the temperature is controlled according to 900 ℃, the heating coefficient of the region 11-12 is 0.3min/mm, the total time of the steel plate in the region 11-12 is 5.4min, the surface temperature of the steel plate is promoted to approach 900 ℃, and the requirement of higher temperature of water entering is met.
3) And (3) a cooling process: the steel plate is rapidly fed with water at the roll speed of 30m/min, the water inlet temperature is controlled within the range of 882 ℃, the first laminar cooling is carried out at the cooling speed of 6-9 ℃/s, and the water outlet temperature of the steel plate is 685 ℃; and after the intermittence time is 15 seconds, carrying out secondary cooling, wherein the cooling speed is controlled according to 3-6 ℃/s, and the final temperature of the steel plate for returning red is controlled at 568 ℃.
4) Straightening strengthening and internal stress eliminating: and (3) quickly straightening the steel plate after secondary cooling, controlling the straightening temperature to be 512 ℃, controlling the straightening pass to be 3 times, airing to be 413 ℃, and finally straightening for 2 times.
And (4) analyzing results: mechanical properties analysis is given in the following table
TABLE 2 tensile Properties
TABLE 3 impact Properties
TABLE 4 flexural Properties
TABLE 5 NDTT properties
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention, which is to be limited only by the claims.
Claims (3)
1. The steel 07MnMoVR for the petroleum storage tank is characterized in that the thickness of the steel plate is less than or equal to 60mm, and comprises the following chemical components in percentage by mass (unit, wt%): c:0.07-0.09, si:0.15 to 0.25, mn: 1.40-1.50, P is less than or equal to 0.015, S is less than or equal to 0.005, als:0.015 to 0.040, nb:0.025-0.035, cr:0.2-0.3, mo:0.12 to 0.22 percent of Fe, 0.03 to 0.04 percent of V, and the balance of Fe and residual elements;
the steel plate has a structure of ferrite and bainite, a welding crack sensitivity coefficient Pcm is less than or equal to 0.20, a yield strength is more than or equal to 490MPa, a tensile strength is 610-730MPa, an elongation is more than or equal to 17%, a transverse impact energy at the temperature of minus 20 ℃ is more than or equal to 100J, a transverse impact energy at the temperature of minus 20 ℃ is more than or equal to 100J in a strain aging manner of 5%, and a drop hammer NDTT temperature without plastic transformation temperature is not lower than minus 40 ℃.
2. The method for producing the steel 07MnMoVR for the petroleum storage tank as claimed in claim 1, comprising the steps of: performing off-line heat treatment, critical normalizing, intermittent cooling and straightening;
for the off-line heat treatment critical normalizing process, the steel plate enters an oxidation-free roller hearth type heat treatment furnace for normalizing heat treatment, and the normalizing heat treatment comprises a temperature rising section, a heat preservation section I and a heat preservation section II, wherein: the temperature of the heating section is controlled at 790-850 ℃, and the heating time is 0.3min/mm; the temperature of the heat preservation section I is 870 ℃, and the heating time is 1.3min/mm; the temperature of the heat preservation section II is 900 ℃, and the heating time is 0.3min/mm;
for the intermittent cooling process, the steel plate after the normalization is cooled by water entering at the roller speed of 30m/min, the water entering temperature is controlled to be 870-890 ℃, the steel plate is subjected to first laminar cooling at the speed of 6-9 ℃/s, and the water outlet temperature is controlled to be 680-700 ℃; stopping for 15s, cooling for the second time at a cooling speed of 3-6 deg.C/s and a re-reddening temperature of 550-580 deg.C;
and for the straightening process requirement, rapidly straightening the steel plate after secondary cooling, controlling the straightening temperature at 510-520 ℃, straightening for 3-4 times, swinging the steel plate on a roller way after the plate shape is flattened, and performing 2 times of final straightening when the temperature is reduced to 400-420 ℃.
3. The method for producing steel 07MnMoVR for petroleum storage tanks according to claim 2, characterized in that: the critical normalizing process of the off-line heat treatment of the steel plate is divided into 12 areas, the areas 1 to 3 are heating sections, the temperature is controlled to be 790-850 ℃, and the temperature difference of each area is 30 ℃; the heat preservation section I is arranged from the 4 th area to the 10 th area, the temperature is 870 ℃, and the heating time is 1.3min/mm; the 11 th to 12 th areas are a heat preservation section II, the temperature is 900 ℃, and the heating time is 0.3min/mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211347942.8A CN115927953A (en) | 2022-10-31 | 2022-10-31 | Steel 07MnMoVR for petroleum storage tank and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211347942.8A CN115927953A (en) | 2022-10-31 | 2022-10-31 | Steel 07MnMoVR for petroleum storage tank and production method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115927953A true CN115927953A (en) | 2023-04-07 |
Family
ID=86556454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211347942.8A Pending CN115927953A (en) | 2022-10-31 | 2022-10-31 | Steel 07MnMoVR for petroleum storage tank and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115927953A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080115931A1 (en) * | 2004-08-13 | 2008-05-22 | Enventure Global Technology, Llc | Expandable Tubular |
| CN104404214A (en) * | 2014-11-06 | 2015-03-11 | 新余钢铁集团有限公司 | Making method of high strength and toughness lamellar tearing-resistant steel plate with thickness of 50-80mm |
| JP2016148105A (en) * | 2015-02-10 | 2016-08-18 | 新日鐵住金株式会社 | Steel sheet for lpg tank and manufacturing method therefor |
| CN108754320A (en) * | 2018-06-08 | 2018-11-06 | 舞阳钢铁有限责任公司 | A kind of quenched and tempered state 07MnMoVR Wide and Heavy Plates and its production method |
| CN109811256A (en) * | 2019-01-15 | 2019-05-28 | 舞阳钢铁有限责任公司 | A kind of low yield strength ratio high-strength steel sheet and its production method |
| CN112442637A (en) * | 2020-11-24 | 2021-03-05 | 南阳汉冶特钢有限公司 | Production method of novel steel plate 12Cr1MoVR for alloy container |
| CN112575255A (en) * | 2020-11-24 | 2021-03-30 | 南阳汉冶特钢有限公司 | Preparation method of 15MnNiNbDR steel plate for ultralow-temperature storage tank |
-
2022
- 2022-10-31 CN CN202211347942.8A patent/CN115927953A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080115931A1 (en) * | 2004-08-13 | 2008-05-22 | Enventure Global Technology, Llc | Expandable Tubular |
| CN104404214A (en) * | 2014-11-06 | 2015-03-11 | 新余钢铁集团有限公司 | Making method of high strength and toughness lamellar tearing-resistant steel plate with thickness of 50-80mm |
| JP2016148105A (en) * | 2015-02-10 | 2016-08-18 | 新日鐵住金株式会社 | Steel sheet for lpg tank and manufacturing method therefor |
| CN108754320A (en) * | 2018-06-08 | 2018-11-06 | 舞阳钢铁有限责任公司 | A kind of quenched and tempered state 07MnMoVR Wide and Heavy Plates and its production method |
| CN109811256A (en) * | 2019-01-15 | 2019-05-28 | 舞阳钢铁有限责任公司 | A kind of low yield strength ratio high-strength steel sheet and its production method |
| CN112442637A (en) * | 2020-11-24 | 2021-03-05 | 南阳汉冶特钢有限公司 | Production method of novel steel plate 12Cr1MoVR for alloy container |
| CN112575255A (en) * | 2020-11-24 | 2021-03-30 | 南阳汉冶特钢有限公司 | Preparation method of 15MnNiNbDR steel plate for ultralow-temperature storage tank |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2022022047A1 (en) | Low-yield-ratio granular bainite high-strength steel plate used in low-temperature environment and manufacturing method therefor | |
| WO2021036272A1 (en) | High-strength and low-yield-ratio 9ni steel plate for ship lng storage tanks and manufacturing method therefor | |
| US11053563B2 (en) | X80 pipeline steel with good strain-aging performance, pipeline tube and method for producing same | |
| CN105755369B (en) | A kind of steel plate of the easy welding anti-lamellar tearing excellent performance of low temperature and preparation method thereof | |
| CN108624744B (en) | Q500qE bridge steel plate and production method thereof | |
| CN110564921B (en) | Method for producing ultralow-temperature high-strength acid-resistant container steel by casting blank | |
| CN109161790A (en) | The high-level high tenacity pipe fitting steel plate and its manufacturing method used under a kind of acid condition | |
| CN106756612B (en) | A kind of easy laser welding hull plate steel of bainite/martensite/austenite high-ductility and manufacture method | |
| CN110129685B (en) | Manufacturing method of 7Ni steel thick plate for ultra-low temperature container | |
| CN109252107B (en) | Production method of high-flatness ultrahigh-strength steel | |
| CN110565013B (en) | Method for producing acid-resistant container steel with ultralow temperature and high core impact value by casting blank | |
| CN110863135B (en) | High-nickel steel for low-temperature container and manufacturing method thereof | |
| CN107841689A (en) | A kind of weather-resistant steel plate and its manufacture method | |
| CN113549824A (en) | Hot continuous rolling limit thickness specification high-strength pipeline steel plate coil and manufacturing method thereof | |
| CN111647806B (en) | Rolling process of Ti-containing low alloy steel | |
| CN111363903B (en) | Method for improving Q & P800 steel performance | |
| JP4265582B2 (en) | Hot-rolled steel sheet with excellent impact properties after quenching and method for producing the same | |
| CN115927953A (en) | Steel 07MnMoVR for petroleum storage tank and production method thereof | |
| CN112410668B (en) | 780 MPa-grade steel for automobile structure and production method thereof | |
| CN110004362B (en) | Production method for improving yield ratio and hole expanding performance of cold-rolled DP780 steel | |
| CN112877608A (en) | Hot-rolled automobile steel with yield strength of more than 960MPa and manufacturing method thereof | |
| CN111676426A (en) | Steel for complex structural member of automobile frame and manufacturing method thereof | |
| CN112322875B (en) | Method for producing X70 pipeline steel plate with 3-8mm ultrathin specification and used under ultralow temperature condition by using curling furnace | |
| CN109518092A (en) | The low silicon analysis of producing hot rolled TRIP containing aluminium of high strength and ductility Nb-microalloying and preparation method | |
| CN110592347B (en) | Production method of 1200 MPa-grade complex phase steel coil plate by hot rolling on-line heat treatment |
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 |