CN104894474A - V-N microalloyed Q550 grade medium plate and preparation method thereof - Google Patents
V-N microalloyed Q550 grade medium plate and preparation method thereof Download PDFInfo
- Publication number
- CN104894474A CN104894474A CN201510403905.8A CN201510403905A CN104894474A CN 104894474 A CN104894474 A CN 104894474A CN 201510403905 A CN201510403905 A CN 201510403905A CN 104894474 A CN104894474 A CN 104894474A
- Authority
- CN
- China
- Prior art keywords
- steel plate
- percent
- plate
- preparation
- microalloying
- 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
Abstract
The invention aims at providing a V-N microalloyed Q550 grade medium plate and a preparation method thereof which are specific to the condition that in the prior art, the Q550 grade medium plate expensive alloy is in large consumption and the preparation process is complex. The chemical constitutions of the steel are as follows by weight percentage: 0.06 to 0.12 percent of C, 1.20 to 2.00 percent of Mn, 0.10 to 0.50 percent of Si, 0.002 to 0.01 percent of S, 0.003 to 0.01 percent of P, 0.01 to 0.05 percent of Al, 0.06 to 0.15 percent of V, 0.01 to 0.02 percent of N and the balance of Fe and other unavoidable impurities; the preparation method comprises the steps of heating a steel billet to 1000 to 1200 DEG C along with a furnace and performing heat preservation for 3 to 4 hours, and further carrying out hot rolling on the steel billet to form a hot rolled plate being 20 to 50mm in thickness, wherein the beginning temperature and the finishing temperature in a rough rolling stage are respectively 1030 to 1150 DEG C and 980 to 1020 DEG C, and the beginning temperature and the finishing temperature in a finish rolling stage are respectively 908 to 925 DEG C and 820 to 845 DEG C; cooling the plate by water to 545 to 650 DEG C after the hot rolling, and then cooling by air to room temperature. The plate is a high-toughness ultra-low-carbon medium-manganese medium plate, and the metallographic structure of the plate is a fine crystalline ferrite, a pearlite and an acicular ferrite; the method is simple in operation process, has no need of quenching and tempering treatment, and is easy to realize industrial production.
Description
Technical field
The invention belongs to plate of moderate thickness and manufacture field, be specifically related to a kind of V-N microalloying Q550 rank steel plate and preparation method thereof.
Background technology
Having thick steel plates in the advanced person of high strength, superior low temperature impelling strength and good welds performance is the preferred material of the steel construction such as bridge, hull, building, pressurized vessel, coal machine and ocean platform, wherein low-alloy high-strength steel Q550D is mainly used in the welding structural element under dynamic load, heavy duty and reverse cyclic loadings condition, requires high comprehensive mechanical performance and good weldability.Compared with hot rolled strip, due to the restriction of mill load and torque capability, in middle thick steel plates controlled rolling and controlled cooling process, the feature such as have that rolling temperature is high, passage pressure little and passage interval time is long, distortion and cooling are difficult to be uniformly distributed in a thickness direction, therefore can be formed and thickly wait the recrystallize austenite of axle, finally cause steel plate center often to form the not good tissue such as thick granular bainite and Wei Shi body, thus cause the seriously uneven of structure property on steel plate thickness direction.In order to obtain good toughness and welding property, the C content of steel significantly reduces, and causes interpolation Si and the Mn unit that is decreased through of intensity usually to compensate thereupon.The precipitation strength that further raising intensity is passed through separately or compound is added micro alloying element Nb, Ti and formed and refined crystalline strengthening effect.Add Nb suppress austenitic recrystallize and realize controlled rolling, add Ti and avoid in welding process austenitic unusual coarsening.
Typical Q550D level steel plate all adopts bainite structure, in order to improve the homogeneity of Nb-Ti microalloying plate of moderate thickness thickness direction, with the addition of the alloying element that a large amount of Ni, Mo and Cu etc. are valuable, these alloying elements significantly improve carbon equivalent, cause welding property unsatisfactory.Nippon company, NKK and domestic iron and steel enterprises have employed the online accelerating cooling technology of low temperature rolling technology and a new generation, but the control difficulty in heart portion still exists.Domestic at present only have minority to have advanced to smelt and iron and steel enterprise that milling train, aligning are equipped have developed characteristic Q550D level steel plate, but still there is the critical technological point being difficult to overcome at present, roll rear final cooling temperature too low, steel plate wooden dipper curvature is more serious, at all cannot leveling, therefore in actual production process, difficulty is very big.And low temperature rolling power is large and cooling needs the equipment technology level of enterprise fast, Q-tempering process needs high energy consumption and long production cycle.The extension property of bainite structure is poor, the high temperature thermoplasticity of high Nb steel is poor, often cause plate surface star check, recent steel industry competition constantly aggravation, the few and controlled rolling and controlled cooling Q550D level steel plate of new generation that equipment requirements is low of a kind of expensive alloys consumption of exploitation is badly in need of in each iron and steel enterprise.
Summary of the invention
The object of the invention is and the situation of complicated process of preparation many for expensive alloys consumption in Q550 level steel plate in prior art, provide a kind of V-N microalloying Q550 rank steel plate and preparation method thereof.This steel plate is the steel plate of manganese in high tough Ultra-low carbon, and it is organized as thin brilliant ferritic-pearlitic and/or acicular ferrite; The method operating process is simple, without the need to Q-tempering process, easily realizes suitability for industrialized production.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of V-N microalloying Q550 rank steel plate, its chemical constitution is by weight percentage: C:0.06 ~ 0.12%, Mn:1.20 ~ 2.00%, Si:0.10 ~ 0.50%, S:0.002 ~ 0.01%, P:0.003 ~ 0.01%, Al:0.01 ~ 0.05%, V:0.06 ~ 0.15%, N:0.01 ~ 0.02%, surplus is Fe and other inevitable impurity;
The thickness of above-mentioned steel plate is 20 ~ 50mm;
The metallographic structure of above-mentioned steel plate is fine ferrite grain and perlite or ferrite, perlite and acicular ferrite.
The yield strength of above-mentioned steel plate is 557 ~ 596MPa, and tensile strength is 685 ~ 724MPa, and unit elongation is 19.6 ~ 22.6% ,-40 DEG C of ballistic work > 101J.
The preparation method of above-mentioned V-N microalloying Q550 rank steel plate, comprises the following steps:
Be that the steel billet of 120 ~ 220mm is heated to 1000 ~ 1200 DEG C with stove and is incubated 3 ~ 4h by thickness, the chemical constitution of steel billet is by weight percentage: C:0.06 ~ 0.12%, Mn:1.20 ~ 2.00%, Si:0.10 ~ 0.50%, S:0.002 ~ 0.01%, P:0.003 ~ 0.01%, Al:0.01 ~ 0.05%, V:0.06 ~ 0.15%, N:0.01 ~ 0.02%, surplus is Fe and other inevitable impurity;
The hot-rolled steel sheet becoming 20 ~ 50mm thick hot rolling of steel billet again, the start rolling temperature of rough rolling step and finishing temperature are respectively 1030 ~ 1150 DEG C and 980 ~ 1020 DEG C, and the start rolling temperature in finish rolling stage and finishing temperature are respectively 908 ~ 925 DEG C and 820 ~ 845 DEG C;
After hot rolling terminates by steel plate with rate of cooling water-cooled to 545 ~ 650 DEG C of 12 ~ 25 DEG C/s, air cooling is to room temperature subsequently, obtains V-N microalloying Q550 rank steel plate product; The metallographic structure of steel plate is fine ferrite grain and perlite or fine ferrite grain, perlite and acicular ferrite.
After testing, the yield strength of steel plate product prepared by aforesaid method is 557 ~ 596MPa, and tensile strength is 685 ~ 724MPa, and unit elongation is 19.6 ~ 22.6% ,-40 DEG C of ballistic work > 101J.
Compared with prior art, advantage of the present invention is:
(1) steel plate carbon content of the present invention is low, and weight percentage is 0.06 ~ 0.12%, and is avoided the formation of thick cementite in steel plate tissue by controlled rolling and controlled cooling, and steel plate low-temperature impact toughness is good; Low-carbon (LC) design reduces welding carbon equivalent, can improving welding property.
(2) the inventive method adopts cooling controlling and rolling controlling process, utilizes the VN of deformation-induced precipitation in austenite to promote ferrite forming core and crystal grain thinning, effectively improves the toughness and tenacity of steel plate.China V ore reserves enriches, in finishing stands, in austenite, deformation induced VN separates out, due to VN and ferritic lattice equations extremely low, the VN precipitate of high-volume fractional significantly can promote the forming core of Intragranular Acicular Ferrite, thus significantly crystal grain thinning, improve low temperature impact properties; N is cheap alloying element, and high N content can increase V-N solubility product thus promote the precipitation of VN, and in the annealing process after cold eventually, the VN disperse ground of a large amount of nanoscale is separated out, and can play significant precipitation strength effect; Therefore adopt V-N microalloying in conjunction with cooling controlling and rolling controlling process, the effect of Intragranular Acicular Ferrite forming core promotes plate of moderate thickness heart portion toughness and tenacity to utilize VN to promote, for iron and steel enterprise's product up-gradation, energy-saving and cost-reducing significant.
(3) the V-N microalloying Q550 rank Properties of medium and heavy plate prepared by the present invention is excellent: yield strength is 557 ~ 596MPa, and tensile strength is 685 ~ 724MPa, and unit elongation is 19.6 ~ 22.6% ,-40 DEG C of ballistic work > 101J.
(4) the steel plate cost prepared of the present invention is low.Steel plate expensive alloys consumption of the present invention is few; And the inventive method operating process is simple, without the need to Q-tempering process, reduces production cost, easily realizes suitability for industrialized production.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of preparation method of the present invention;
Fig. 2 is the metallographic structure figure of the steel plate that embodiment 1 obtains;
Fig. 3 is the metallographic structure figure of the steel plate that embodiment 2 obtains;
Fig. 4 is the metallographic structure figure of the steel plate that embodiment 3 obtains.
Embodiment
The hot rolls that in the present invention, embodiment 1 adopts and process furnace are hot rolls and the process furnace of certain steel mill domestic;
The hot rolls that in the present invention, embodiment 2,3 adopts is Φ 450 hot rolls that Northeastern University's rolling technique and tandem rolling automatization National Key Laboratory manufacture and design, and process furnace is high temperature box type resistance furnace, and model is RX
4-85-13B;
Microscope is LEICA-DMIRM multifunctional optical microscope.
Embodiment 1
A kind of thickness is the V-N microalloying Q550D rank steel plate of 50mm, its chemical constitution is by weight percentage: C:0.12%, Mn:1.90%, Si:0.20%, S:0.005%, P:0.003%, Al:0.01%, V:0.11%, N:0.018%, surplus is Fe and other inevitable impurity; Be organized as fine ferrite grain and perlite.
Its preparation method is as follows:
Be that the continuously cast bloom of 220mm is heated to 1200 DEG C with stove and is incubated 3h by the thickness of said components, the hot-rolled sheet that subsequent hot becomes 50mm thick, the start rolling temperature of rough rolling step and finishing temperature are respectively 1150 DEG C and 1020 DEG C, the start rolling temperature in finish rolling stage and finishing temperature are respectively 925 DEG C and 845 DEG C, rough rolling step is through 5 passes, total draft is 55.9%, and the finish rolling stage, total reduction was 33.2% through 5 passes;
After hot rolling terminates by sheet material with the rate of cooling water-cooled to 650 DEG C of 12 DEG C/s, air cooling is to room temperature subsequently, obtains the plate of moderate thickness after controlled rolling and controlled cooling; In sheet material, metallographic structure is fine ferrite grain and perlite, as shown in Figure 2.
After testing, the yield strength of this steel plate is 557MPa, and tensile strength is 685MPa, and unit elongation is 22.6% ,-20 DEG C of ballistic work 185J ,-40 DEG C of ballistic work 122J, meets the requirement of Q550D level plate of moderate thickness.
Embodiment 2
A kind of thickness is the V-N microalloying Q550E rank plate of moderate thickness of 30mm, its chemical constitution is by weight percentage: C:0.10%, Mn:1.20%, Si:0.10%, S:0.002%, P:0.01%, Al:0.04%, V:0.15%, N:0.01%, surplus is Fe and other inevitable impurity; Be organized as fine ferrite grain, perlite and acicular ferrite.
Its preparation method is as follows:
Be that the steel billet of 140mm is heated to 1100 DEG C with stove and is incubated 4h by the thickness of said components, the hot-rolled sheet that subsequent hot becomes 30mm thick, the start rolling temperature of rough rolling step and finishing temperature are respectively 1080 DEG C and 990 DEG C, the start rolling temperature in finish rolling stage and finishing temperature are respectively 920 DEG C and 837 DEG C, rough rolling step is through 5 passes, total draft is 41.4%, and the finish rolling stage, total reduction was 37.1% through 7 passes;
After hot rolling terminates by sheet material with the rate of cooling water-cooled to 610 DEG C of 18 DEG C/s, air cooling is to room temperature subsequently, obtains the plate of moderate thickness after controlled rolling and controlled cooling; In sheet material, metallographic structure is fine ferrite grain, perlite and acicular ferrite, as shown in Figure 3.
After testing, the yield strength of this steel plate is 573MPa, and tensile strength is 692MPa, and unit elongation is 20.8% ,-20 DEG C of ballistic work 192J ,-40 DEG C of ballistic work 133J ,-60 DEG C of ballistic work 102J, meets the requirement of Q550E level plate of moderate thickness.
Embodiment 3
A kind of thickness is the V-N microalloying Q550E rank plate of moderate thickness of 20mm, its chemical constitution is by weight percentage: C:0.06%, Mn:2.00%, Si:0.50%, S:0.01%, P:0.006%, Al:0.05%, V:0.06%, N:0.02%, surplus is Fe and other inevitable impurity; Be organized as fine ferrite grain, perlite and acicular ferrite.
Its preparation method is as follows:
Be that the steel billet of 120mm is heated to 1000 DEG C with stove and is incubated 4h by the thickness of said components, the hot-rolled sheet that subsequent hot becomes 20mm thick, the start rolling temperature of rough rolling step and finishing temperature are respectively 1030 DEG C and 980 DEG C, the start rolling temperature in finish rolling stage and finishing temperature are respectively 908 DEG C and 820 DEG C, rough rolling step is through 5 passes, total draft is 58.3%, and the finish rolling stage, total reduction was 25% through 5 passes;
With the rate of cooling water-cooled to 545 DEG C of 25 DEG C/s after hot rolling terminates, air cooling is to room temperature subsequently, obtains the plate of moderate thickness after controlled rolling and controlled cooling; In sheet material, metallographic structure is fine ferrite grain, perlite and a large amount of acicular ferrite, as shown in Figure 4.
After testing, the yield strength of this steel plate is 596MPa, and tensile strength is 724MPa, and unit elongation is 19.6% ,-20 DEG C of ballistic work 156J ,-40 DEG C of ballistic work 101J ,-60 DEG C of ballistic work 89J, meets the requirement of Q550E level plate of moderate thickness.
Claims (6)
1. a V-N microalloying Q550 rank steel plate, it is characterized in that, chemical constitution is by weight percentage: C:0.06 ~ 0.12%, Mn:1.20 ~ 2.00%, Si:0.10 ~ 0.50%, S:0.002 ~ 0.01%, P:0.003 ~ 0.01%, Al:0.01 ~ 0.05%, V:0.06 ~ 0.15%, N:0.01 ~ 0.02%, surplus is Fe and other inevitable impurity; Described steel plate thickness is 20 ~ 50mm.
2. a kind of V-N microalloying Q550 rank steel plate according to claim 1, is characterized in that, the metallographic structure of described steel plate is fine ferrite grain and perlite or fine ferrite grain, perlite and acicular ferrite.
3. a kind of V-N microalloying Q550 rank steel plate according to claim 1, it is characterized in that, the yield strength of described steel plate is 557 ~ 596MPa, and tensile strength is 685 ~ 724MPa, unit elongation is 19.6 ~ 22.6% ,-40 DEG C of ballistic work > 101J.
4. a preparation method for V-N microalloying Q550 rank steel plate according to claim 1, is characterized in that, comprise the following steps:
Steel billet is heated to 1000 ~ 1200 DEG C with stove and is incubated 3 ~ 4h, the chemical constitution of steel billet is by weight percentage: C:0.06 ~ 0.12%, Mn:1.20 ~ 2.00%, Si:0.10 ~ 0.50%, S:0.002 ~ 0.01%, P:0.003 ~ 0.01%, Al:0.01 ~ 0.05%, V:0.06 ~ 0.15%, N:0.01 ~ 0.02%, surplus is Fe and other inevitable impurity;
Again by hot-rolled steel sheet that steel billet becomes 20 ~ 50mm thick through two benches hot rolling, the start rolling temperature of rough rolling step and finishing temperature are respectively 1030 ~ 1150 DEG C and 980 ~ 1020 DEG C, and the start rolling temperature in finish rolling stage and finishing temperature are respectively 908 ~ 925 DEG C and 820 ~ 845 DEG C;
Hot rolling terminates steel plate water-cooled to 545 ~ 650 DEG C, and air cooling is to room temperature subsequently, obtains product.
5. the preparation method of a kind of V-N microalloying Q550 rank steel plate according to claim 4, it is characterized in that, described steel billet thickness is 120 ~ 220mm.
6. the preparation method of a kind of V-N microalloying Q550 rank steel plate according to claim 4, it is characterized in that, the rate of cooling of described water-cooled is 12 ~ 25 DEG C/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510403905.8A CN104894474B (en) | 2015-07-10 | 2015-07-10 | A kind of V N microalloying Q550 rank medium plate and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510403905.8A CN104894474B (en) | 2015-07-10 | 2015-07-10 | A kind of V N microalloying Q550 rank medium plate and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104894474A true CN104894474A (en) | 2015-09-09 |
| CN104894474B CN104894474B (en) | 2017-03-08 |
Family
ID=54027423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510403905.8A Active CN104894474B (en) | 2015-07-10 | 2015-07-10 | A kind of V N microalloying Q550 rank medium plate and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104894474B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106756529A (en) * | 2016-11-18 | 2017-05-31 | 东北大学 | The method for improving acicular ferrite volume fraction in double-roller rolling low-carbon (LC) Thin Strip Steel |
| CN107794450A (en) * | 2017-11-10 | 2018-03-13 | 山东钢铁股份有限公司 | A kind of yield strength 550MPa grade low-temp high tenacity is hot rolled H-shaped and preparation method thereof |
| CN107937805A (en) * | 2017-11-16 | 2018-04-20 | 武汉钢铁有限公司 | Steel plate for low temperature pressure container and its manufacture method |
| CN107937804A (en) * | 2017-11-16 | 2018-04-20 | 武汉钢铁有限公司 | High tenacity steel plate for low temperature pressure container and its manufacture method |
| CN108193141A (en) * | 2017-12-29 | 2018-06-22 | 东北大学 | A kind of Q550 rank hot-strips of V-N-Cr microalloyings and preparation method thereof |
| CN108588557A (en) * | 2018-04-26 | 2018-09-28 | 东北大学 | A kind of micro-alloyed hot-rolled strips of low-carbon V-N-Nb and preparation method thereof |
| CN109338228A (en) * | 2018-11-21 | 2019-02-15 | 钢铁研究总院 | A kind of high conductivity anode steel claw steel and preparation method thereof |
| CN111187969A (en) * | 2020-02-17 | 2020-05-22 | 本钢板材股份有限公司 | Production method of 400 MPa-level niobium-nitrogen microalloyed twisted steel |
| CN111378824A (en) * | 2020-05-14 | 2020-07-07 | 东北大学 | Hot processing technology of 51CrV4 hypoeutectoid fine blanking steel |
| CN114411052A (en) * | 2021-12-24 | 2022-04-29 | 中联先进钢铁材料技术有限责任公司 | V-N microalloyed steel plate with low cost and high strength and toughness and preparation method thereof |
| CN114672725A (en) * | 2022-02-27 | 2022-06-28 | 日钢营口中板有限公司 | Steel for TMCP delivery Q550D engineering machinery and preparation method thereof |
| CN116043108A (en) * | 2022-12-13 | 2023-05-02 | 东北大学 | Low-yield-ratio V-N microalloyed 690 MPa-level medium plate and preparation method thereof |
| CN116200672A (en) * | 2022-11-25 | 2023-06-02 | 重庆钢铁股份有限公司 | Low-cost high-strength structural steel plate Q460D and manufacturing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5976694A (en) * | 1982-10-25 | 1984-05-01 | Nisshin Steel Co Ltd | Welding wire for high purity ferritic stainless steel |
| CN1748883A (en) * | 2005-10-20 | 2006-03-22 | 广州珠江钢铁有限责任公司 | Process for producing V-N micro alloy high strength steel band using thin plate blank continuously casting and continuously rolling technology |
| KR20100001333A (en) * | 2008-06-26 | 2010-01-06 | 현대제철 주식회사 | High strength hot rolled steel sheet having stretch flangeability and good weldability, and method for producing the same |
| CN103361551A (en) * | 2012-03-30 | 2013-10-23 | 鞍钢股份有限公司 | V-N microalloying based high toughness ship board and preparation method thereof |
| CN104694850A (en) * | 2015-03-12 | 2015-06-10 | 东北大学 | Thick steel plate with excellent rack arrest property and preparation method of thick steel plate |
-
2015
- 2015-07-10 CN CN201510403905.8A patent/CN104894474B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5976694A (en) * | 1982-10-25 | 1984-05-01 | Nisshin Steel Co Ltd | Welding wire for high purity ferritic stainless steel |
| CN1748883A (en) * | 2005-10-20 | 2006-03-22 | 广州珠江钢铁有限责任公司 | Process for producing V-N micro alloy high strength steel band using thin plate blank continuously casting and continuously rolling technology |
| KR20100001333A (en) * | 2008-06-26 | 2010-01-06 | 현대제철 주식회사 | High strength hot rolled steel sheet having stretch flangeability and good weldability, and method for producing the same |
| CN103361551A (en) * | 2012-03-30 | 2013-10-23 | 鞍钢股份有限公司 | V-N microalloying based high toughness ship board and preparation method thereof |
| CN104694850A (en) * | 2015-03-12 | 2015-06-10 | 东北大学 | Thick steel plate with excellent rack arrest property and preparation method of thick steel plate |
Non-Patent Citations (2)
| Title |
|---|
| JUN HU ET AL.: "Effect of welding heat input on microstructures and toughness in simulated CGHAZ of V-N high strength steel", 《MATERIALS SCIENCE & ENGINEERING A》 * |
| 胡军 等: "590MPa级热轧V-N高强车轮钢组织性能控制", 《东北大学学报（自然科学版）》 * |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106756529A (en) * | 2016-11-18 | 2017-05-31 | 东北大学 | The method for improving acicular ferrite volume fraction in double-roller rolling low-carbon (LC) Thin Strip Steel |
| CN107794450A (en) * | 2017-11-10 | 2018-03-13 | 山东钢铁股份有限公司 | A kind of yield strength 550MPa grade low-temp high tenacity is hot rolled H-shaped and preparation method thereof |
| CN107937804B (en) * | 2017-11-16 | 2019-10-08 | 武汉钢铁有限公司 | High tenacity steel plate for low temperature pressure container and its manufacturing method |
| CN107937805A (en) * | 2017-11-16 | 2018-04-20 | 武汉钢铁有限公司 | Steel plate for low temperature pressure container and its manufacture method |
| CN107937804A (en) * | 2017-11-16 | 2018-04-20 | 武汉钢铁有限公司 | High tenacity steel plate for low temperature pressure container and its manufacture method |
| CN107937805B (en) * | 2017-11-16 | 2020-05-19 | 武汉钢铁有限公司 | Steel sheet for low-temperature pressure vessel and method for producing same |
| CN108193141A (en) * | 2017-12-29 | 2018-06-22 | 东北大学 | A kind of Q550 rank hot-strips of V-N-Cr microalloyings and preparation method thereof |
| CN108588557B (en) * | 2018-04-26 | 2019-12-03 | 东北大学 | A kind of micro-alloyed hot-rolled strip of low-carbon V-N-Nb and preparation method thereof |
| CN108588557A (en) * | 2018-04-26 | 2018-09-28 | 东北大学 | A kind of micro-alloyed hot-rolled strips of low-carbon V-N-Nb and preparation method thereof |
| CN109338228A (en) * | 2018-11-21 | 2019-02-15 | 钢铁研究总院 | A kind of high conductivity anode steel claw steel and preparation method thereof |
| CN111187969A (en) * | 2020-02-17 | 2020-05-22 | 本钢板材股份有限公司 | Production method of 400 MPa-level niobium-nitrogen microalloyed twisted steel |
| CN111378824A (en) * | 2020-05-14 | 2020-07-07 | 东北大学 | Hot processing technology of 51CrV4 hypoeutectoid fine blanking steel |
| CN114411052A (en) * | 2021-12-24 | 2022-04-29 | 中联先进钢铁材料技术有限责任公司 | V-N microalloyed steel plate with low cost and high strength and toughness and preparation method thereof |
| CN114672725A (en) * | 2022-02-27 | 2022-06-28 | 日钢营口中板有限公司 | Steel for TMCP delivery Q550D engineering machinery and preparation method thereof |
| CN116200672A (en) * | 2022-11-25 | 2023-06-02 | 重庆钢铁股份有限公司 | Low-cost high-strength structural steel plate Q460D and manufacturing method |
| CN116043108A (en) * | 2022-12-13 | 2023-05-02 | 东北大学 | Low-yield-ratio V-N microalloyed 690 MPa-level medium plate and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104894474B (en) | 2017-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104894474B (en) | A kind of V N microalloying Q550 rank medium plate and preparation method thereof | |
| CN100455692C (en) | High-strength weathering steel and method of manufacturing same | |
| CN109182919B (en) | Production method of multiphase structure high-toughness ship plate steel EH47 | |
| CN103103458B (en) | High strength weathering resistant steel and preparation method | |
| CN102877007B (en) | Steel plate for low-crack sensitivity pressure container with thickness being more than or equal to 80mm and manufacture method of steel plate | |
| CN110791702B (en) | Marine steel plate with good welding performance and low yield ratio and manufacturing method thereof | |
| CN106282831B (en) | A kind of high-strength container weather resisting steel and its manufacturing method | |
| US9663840B2 (en) | 500 MPA grade longitudinally-welded steel pipe with low yield ratio and manufacturing method therefor | |
| CN103468905B (en) | A kind of 485MPa level line steel hot rolling roll bending and manufacture method thereof | |
| CN102699031B (en) | 900 MPa grade ultrahigh-toughness low alloy steel and manufacture method thereof | |
| CN108660395A (en) | Manganese high-strength cut deal and quenching-dynamic partition production technology preparation method in a kind of 690MPa grades of low-carbon | |
| CN103160746A (en) | High strength steel for thick wall water pipe and manufacturing method thereof | |
| CN110846577A (en) | 690 MPa-grade high-strength low-yield-ratio medium-thickness manganese steel and manufacturing method thereof | |
| CN107988562A (en) | A kind of X65 grades inexpensive submerged pipeline steel and its manufacture method | |
| CN104498821A (en) | Medium-manganese high-strength steel for automobiles and production method thereof | |
| CN109207854A (en) | The Marine Engineering Steel and its manufacturing method of ultra-wide size high-tensile high-ductility performance | |
| CN109957710B (en) | V-containing large-deformation X80M pipeline steel plate and manufacturing method thereof | |
| CN110358970B (en) | Welded structure bainite high-strength steel with yield strength of 1100MPa and preparation method thereof | |
| CN104018063B (en) | The production method of low-alloy high-strength Q420C medium plates | |
| CN102191430A (en) | Easy welding steel plate with yield strength of 550MPa and high toughness and manufacturing method thereof | |
| CN109957709A (en) | One kind X70M Pipeline Steel Plate of large deformation containing V and its manufacturing method | |
| CN103361573A (en) | 420MPa grade vanadium-containing nitrogen steel and production method thereof | |
| CN104451446B (en) | Thick-gauge, high-strength and high-toughness bainite engineering steel and production method thereof | |
| CN104278206A (en) | Steel plate with thickness of smaller than 60mm and yield strength of 690MPa and preparation method of steel plate | |
| CN102634727B (en) | High-toughness steel for engineering machine and production method thereof by using TMCP (Thermal Mechanical Control Processing) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |