CN116334488A - A kind of Q690D steel plate with high and low temperature impact toughness and its production method - Google Patents
A kind of Q690D steel plate with high and low temperature impact toughness and its production method Download PDFInfo
- Publication number
- CN116334488A CN116334488A CN202310288915.6A CN202310288915A CN116334488A CN 116334488 A CN116334488 A CN 116334488A CN 202310288915 A CN202310288915 A CN 202310288915A CN 116334488 A CN116334488 A CN 116334488A
- Authority
- CN
- China
- Prior art keywords
- weight percent
- steel plate
- low temperature
- impact toughness
- steel
- 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 107
- 239000010959 steel Substances 0.000 title claims abstract description 107
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 238000005096 rolling process Methods 0.000 claims abstract description 44
- 238000001816 cooling Methods 0.000 claims abstract description 41
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 35
- 238000005496 tempering Methods 0.000 claims abstract description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052786 argon Inorganic materials 0.000 claims abstract description 19
- 238000007670 refining Methods 0.000 claims abstract description 19
- 238000007664 blowing Methods 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 229910052742 iron Inorganic materials 0.000 claims abstract description 10
- 238000003723 Smelting Methods 0.000 claims abstract description 6
- 238000009749 continuous casting Methods 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 238000007689 inspection Methods 0.000 claims abstract description 4
- 238000005070 sampling Methods 0.000 claims abstract description 4
- 239000000126 substance Substances 0.000 claims description 13
- 238000005275 alloying Methods 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 5
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 claims description 2
- 230000003009 desulfurizing effect Effects 0.000 claims 2
- 229910052719 titanium Inorganic materials 0.000 abstract description 12
- 229910052720 vanadium Inorganic materials 0.000 abstract description 12
- 229910052750 molybdenum Inorganic materials 0.000 abstract description 11
- 229910052758 niobium Inorganic materials 0.000 abstract description 10
- 238000005452 bending Methods 0.000 abstract description 7
- 238000003466 welding Methods 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 description 14
- 229910052804 chromium Inorganic materials 0.000 description 11
- 229910052748 manganese Inorganic materials 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000010276 construction Methods 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 229910000746 Structural steel Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910001563 bainite Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
Images
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B3/02—Rolling special iron alloys, e.g. stainless steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- 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
- C21D11/00—Process control or regulation for heat treatments
- C21D11/005—Process control or regulation for heat treatments for cooling
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/002—Bainite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Description
技术领域technical field
本发明涉及钢铁生产制造领域，具体涉及一种Q690D钢板及其生产方法，尤其是一种具有高低温冲击韧性Q690D钢板及其生产方法。The invention relates to the field of steel production and manufacturing, in particular to a Q690D steel plate and a production method thereof, in particular to a Q690D steel plate with high and low temperature impact toughness and a production method thereof.
背景技术Background technique
Q690D高强钢是国家标准GB/T 1591-2008《低合金高强度结构钢》中的牌号，要求屈服强度ReL≥690MPa，抗拉强度Rm为770～940MPa，延伸率A≥14％，-20℃低温冲击≥47J，180°冷弯性能合格。在矿山机械、港口机械、起重机、铁锚、盾构机、液压支架、塔吊以及各种钢结构中均有应用。工程机械设备如挖掘机、装载机等常在复杂的环境中工作，在工作运行中常需要承受较大的冲击载荷，并且随着工程机械设备生产厂家不断向高强、轻量化方向发展，对钢板材料的低温冲击韧性要求越来越高，而在保证高强度的同时，确保优良的塑性、韧性、折弯、焊接等综合性能一直是较大难点。Q690D high-strength steel is a brand in the national standard GB/T 1591-2008 "Low Alloy High Strength Structural Steel", which requires yield strength ReL≥690MPa, tensile strength Rm of 770～940MPa, elongation A≥14%, -20℃ Low temperature impact ≥ 47J, 180° cold bending performance is qualified. It is used in mining machinery, port machinery, cranes, iron anchors, shield machines, hydraulic supports, tower cranes and various steel structures. Construction machinery equipment such as excavators and loaders often work in complex environments, and often need to withstand large impact loads during work and operation, and as construction machinery equipment manufacturers continue to develop in the direction of high strength and lightweight The requirements for low temperature impact toughness are getting higher and higher, and it has always been a big difficulty to ensure excellent plasticity, toughness, bending, welding and other comprehensive properties while ensuring high strength.
综上所述，现有技术中存在以下问题：如何在保证Q690D钢板高强度的同时确保其低温冲击韧性，满足用户的使用需求。To sum up, the following problems exist in the prior art: how to ensure the low-temperature impact toughness of the Q690D steel plate while ensuring its high strength, so as to meet the needs of users.
发明内容Contents of the invention
本发明提供一种Q690D钢板及其生产方法，尤其是一种具有高低温冲击韧性Q690D钢板及其生产方法，以解决在保证Q690D钢板高强度的同时确保其低温冲击韧性，以满足用户的使用需求。The invention provides a Q690D steel plate and its production method, especially a Q690D steel plate with high and low temperature impact toughness and its production method, to solve the problem of ensuring the high strength of the Q690D steel plate while ensuring its low temperature impact toughness to meet the needs of users .
为此，本发明提出一种具有高低温冲击韧性Q690D钢板生产方法，所述具有高低温冲击韧性Q690D钢板化学成分重量百分比为：C：0.05～0.10wt％，Si:0.40～0.60wt％，Mn：1.70～1.90wt％，P≤0.020wt％，S≤0.008wt％，Nb：0.02～0.10wt％，V：0.02～0.10wt％，Ti：0.03～0.08wt％，Cr：0.10～0.50wt％，Mo：0.30～0.50wt％，Alt：0.02～0.03wt％，N≤0.006wt％；For this reason, the present invention proposes a production method of Q690D steel plate with high and low temperature impact toughness, the chemical composition weight percentage of said Q690D steel plate with high and low temperature impact toughness is: C: 0.05～0.10wt%, Si: 0.40～0.60wt%, Mn : 1.70～1.90wt%, P≤0.020wt%, S≤0.008wt%, Nb: 0.02～0.10wt%, V: 0.02～0.10wt%, Ti: 0.03～0.08wt%, Cr: 0.10～0.50wt% , Mo: 0.30～0.50wt%, Alt: 0.02～0.03wt%, N≤0.006wt%;
所述具有高低温冲击韧性Q690D钢板生产方法包括以下依次进行的工艺步骤：The production method of the Q690D steel plate with high and low temperature impact toughness includes the following steps in sequence:
铁水预处理、转炉钢水冶炼、炉后吹氩、LF钢水精炼处理、RH钢水精炼处理、板坯连铸、板坯加热、除鳞、粗轧、精轧、预矫直、超快冷工艺、矫直、冷床、回火、取样、钢板检查、标记入库；Hot metal pretreatment, converter molten steel smelting, argon blowing after furnace, LF molten steel refining treatment, RH molten steel refining treatment, slab continuous casting, slab heating, descaling, rough rolling, finishing rolling, pre-straightening, ultra-fast cooling process, Straightening, cooling bed, tempering, sampling, steel plate inspection, marking and storage;
其中，粗轧开轧温度1000～1140℃；精轧开轧温度940～1000℃，精轧终轧温度850～890℃。Among them, the starting temperature of rough rolling is 1000-1140°C; the starting temperature of finishing rolling is 940-1000°C, and the finishing temperature of finishing rolling is 850-890°C.
进一步地，所述超快冷工艺包括钢板精轧终轧后进入超快冷冷却区，保证钢板超快冷开冷温度≥750℃，超快冷水压≥0.3MPa，冷却速度20～35℃/s,冷却后返红温度≤230℃。Further, the ultra-fast cooling process includes entering the ultra-fast cooling zone after the finish rolling and final rolling of the steel plate, so as to ensure that the ultra-fast cooling temperature of the steel plate is ≥750°C, the ultra-fast cooling water pressure is ≥0.3MPa, and the cooling rate is 20-35°C/ s, reddening temperature after cooling ≤ 230 ℃.
进一步地，所述回火：回火温度为570±10℃，回火时间为板厚+50min。Further, the tempering: the tempering temperature is 570±10°C, and the tempering time is plate thickness+50min.
进一步地，所述转炉钢水冶炼：铁水脱硫，保证入炉铁水S≤0.010％，使用一类废钢；过程采用全程底吹氩气，转炉终点控制C≤0.06wt％，P≤0.015wt％。Further, the molten steel smelting in the converter: desulfurization of molten iron, ensure that the molten iron into the furnace is S≤0.010%, and use first-class scrap steel; the whole process adopts bottom blowing argon, and the end point of the converter is controlled at C≤0.06wt%, P≤0.015wt%.
进一步地，所述LF钢水精炼处理：钢水在LF炉进行脱硫、平衡温度、合金化处理以及去除夹杂物；最后一次合金化后必须保证3～20min的中等强度吹氩或强吹氩时间；精炼结束前软吹氩8～10min。Further, the refining process of the LF molten steel: the molten steel is desulfurized in the LF furnace, the temperature is balanced, the alloying treatment is carried out, and the inclusions are removed; after the last alloying, a medium-intensity argon blowing or strong argon blowing time of 3 to 20 minutes must be guaranteed; refining Before the end, blow argon softly for 8-10 minutes.
进一步地，所述RH钢水精炼处理：真空总循环时间15～20min,极限真空保持时间10min以上，净循环时间3min以上，钙处理后软吹氩时间8～10min。Further, the RH molten steel refining treatment: the total vacuum cycle time is 15-20 minutes, the ultimate vacuum holding time is more than 10 minutes, the net cycle time is more than 3 minutes, and the soft argon blowing time after calcium treatment is 8-10 minutes.
进一步地，所述板坯连铸，中间包浇注温度为1524-1543℃，使用低合金钢结晶器保护渣，铸坯拉速为0.80～1.42m/min，使用电磁搅拌工艺。Further, for the slab continuous casting, the tundish pouring temperature is 1524-1543° C., low-alloy steel mold powder is used, the slab casting speed is 0.80-1.42 m/min, and an electromagnetic stirring process is used.
进一步地，所述板坯加热：均热段温度在1200℃以上，保证加热时间≥230min。Further, the slab is heated: the temperature of the soaking section is above 1200° C., and the heating time is guaranteed to be ≥ 230 minutes.
本发明还提供一种具有高低温冲击韧性Q690D钢板，按照前述步骤任一项的方法制成，所述具有高低温冲击韧性Q690D钢板化学成分重量百分比为：C：0.05～0.10wt％，Si:0.40～0.60wt％，Mn：1.70～1.90wt％，P≤0.020wt％，S≤0.008wt％，Nb：0.02～0.10wt％，V：0.02～0.10wt％，Ti：0.03～0.08wt％，Cr：0.10～0.50wt％，Mo：0.30～0.50wt％，Alt：0.02～0.03wt％，N≤0.006wt％。The present invention also provides a Q690D steel plate with high and low temperature impact toughness, which is made according to any one of the aforementioned steps. The chemical composition weight percentage of the Q690D steel plate with high and low temperature impact toughness is: C: 0.05-0.10wt%, Si: 0.40～0.60wt%, Mn: 1.70～1.90wt%, P≤0.020wt%, S≤0.008wt%, Nb: 0.02～0.10wt%, V: 0.02～0.10wt%, Ti: 0.03～0.08wt%, Cr: 0.10-0.50wt%, Mo: 0.30-0.50wt%, Alt: 0.02-0.03wt%, N≤0.006wt%.
进一步地，所述具有高低温冲击韧性Q690D钢板厚度为6～50mm。Further, the thickness of the Q690D steel plate with high and low temperature impact toughness is 6-50 mm.
进一步地，所述具有高低温冲击韧性的Q690D钢板(6mm规格)化学成分重量百分比为：C：0.06wt％，Si:0.45wt％，Mn：1.72wt％，P:0.015wt％，S:0.006wt％，Nb：0.034wt％，V：0.041wt％，Ti：0.032wt％，Cr：0.18wt％，Mo：0.36wt％，Alt：0.028wt％，N：0.005wt％；所述粗轧开轧温度1070℃；精轧开轧温度990℃，精轧终轧温度880℃，所述超快冷工艺保证钢板超快冷开冷温度为765℃，超快冷水压0.32MPa，冷却速度32℃/s,冷却后返红温度158℃；所述回火温度为575℃，回火时间为56min。Further, the chemical composition weight percent of the Q690D steel plate (6mm specification) with high and low temperature impact toughness is: C: 0.06wt%, Si: 0.45wt%, Mn: 1.72wt%, P: 0.015wt%, S: 0.006 wt%, Nb: 0.034wt%, V: 0.041wt%, Ti: 0.032wt%, Cr: 0.18wt%, Mo: 0.36wt%, Alt: 0.028wt%, N: 0.005wt%; The rolling temperature is 1070°C; the finish rolling start temperature is 990°C, and the finish rolling finish temperature is 880°C. The ultra-fast cooling process ensures that the ultra-fast cold start and cold temperature of the steel plate is 765°C, the ultra-fast cold water pressure is 0.32MPa, and the cooling rate is 32°C /s, the temperature of turning red after cooling is 158°C; the tempering temperature is 575°C, and the tempering time is 56min.
进一步地，所述具有高低温冲击韧性的Q690D钢板(20mm规格)化学成分重量百分比为：C：0.07wt％，Si:0.47wt％，Mn：1.77wt％，P:0.014wt％，S:0.006wt％，Nb：0.042wt％，V：0.045wt％，Ti：0.033wt％，Cr：0.20wt％，Mo：0.37wt％，Alt：0.027wt％，N：0.005wt％；所述粗轧开轧温度1066℃；精轧开轧温度982℃，精轧终轧温度872℃，所述超快冷工艺保证钢板超快冷开冷温度为756℃，超快冷水压0.42MPa，冷却速度29℃/s,冷却后返红温度170℃；所述回火温度为572℃，回火时间为70min。Further, the chemical composition weight percent of the Q690D steel plate (20mm specification) with high and low temperature impact toughness is: C: 0.07wt%, Si: 0.47wt%, Mn: 1.77wt%, P: 0.014wt%, S: 0.006 wt%, Nb: 0.042wt%, V: 0.045wt%, Ti: 0.033wt%, Cr: 0.20wt%, Mo: 0.37wt%, Alt: 0.027wt%, N: 0.005wt%; The rolling temperature is 1066°C; the finish rolling start temperature is 982°C, and the finish rolling finish temperature is 872°C. The ultra-fast cooling process ensures that the ultra-fast cold start and cold temperature of the steel plate is 756°C, the ultra-fast cold water pressure is 0.42MPa, and the cooling rate is 29°C /s, the temperature of turning red after cooling is 170°C; the tempering temperature is 572°C, and the tempering time is 70min.
进一步地，所述具有高低温冲击韧性的Q690D钢板(30mm规格)化学成分重量百分比为：C：0.07wt％，Si:0.42wt％，Mn：1.76wt％，P:0.012wt％，S:0.006wt％，Nb：0.052wt％，V：0.066wt％，Ti：0.034wt％，Cr：0.20wt％，Mo：0.37wt％，Alt：0.026wt％，N：0.005wt％；所述粗轧开轧温度1053℃；精轧开轧温度975℃，精轧终轧温度865℃，所述超快冷工艺保证钢板超快冷开冷温度为776℃，超快冷水压0.45MPa，冷却速度28℃/s,冷却后返红温度162℃；所述回火温度为576℃，回火时间为80min。Further, the chemical composition weight percent of the Q690D steel plate (30mm specification) with high and low temperature impact toughness is: C: 0.07wt%, Si: 0.42wt%, Mn: 1.76wt%, P: 0.012wt%, S: 0.006 wt%, Nb: 0.052wt%, V: 0.066wt%, Ti: 0.034wt%, Cr: 0.20wt%, Mo: 0.37wt%, Alt: 0.026wt%, N: 0.005wt%; The rolling temperature is 1053°C; the finish rolling start temperature is 975°C, and the finish rolling finish temperature is 865°C. The ultra-fast cooling process ensures that the ultra-fast cold start and cold temperature of the steel plate is 776°C, the ultra-fast cold water pressure is 0.45MPa, and the cooling rate is 28°C /s, the temperature of turning red after cooling is 162°C; the tempering temperature is 576°C, and the tempering time is 80min.
进一步地，所述具有高低温冲击韧性的Q690D钢板(40mm规格)化学成分重量百分比为：C：0.09wt％，Si:0.41wt％，Mn：1.80wt％，P:0.013wt％，S:0.005wt％，Nb：0.062wt％，V：0.043wt％，Ti：0.033wt％，Cr：0.22wt％，Mo：0.38wt％，Alt：0.028wt％，N：0.005wt％；所述粗轧开轧温度1042℃；精轧开轧温度970℃，精轧终轧温度872℃，所述超快冷工艺保证钢板超快冷开冷温度为780℃，超快冷水压0.48MPa，冷却速度28℃/s,冷却后返红温度201℃；所述回火温度为571℃，回火时间为90min。Further, the chemical composition weight percent of the Q690D steel plate (40mm specification) with high and low temperature impact toughness is: C: 0.09wt%, Si: 0.41wt%, Mn: 1.80wt%, P: 0.013wt%, S: 0.005 wt%, Nb: 0.062wt%, V: 0.043wt%, Ti: 0.033wt%, Cr: 0.22wt%, Mo: 0.38wt%, Alt: 0.028wt%, N: 0.005wt%; The rolling temperature is 1042°C; the finish rolling start temperature is 970°C, and the finish rolling finish temperature is 872°C. The ultra-fast cooling process ensures that the ultra-fast cold start and cold temperature of the steel plate is 780°C, the ultra-fast cold water pressure is 0.48MPa, and the cooling rate is 28°C /s, the reddening temperature after cooling is 201°C; the tempering temperature is 571°C, and the tempering time is 90min.
进一步地，所述具有高低温冲击韧性的Q690D钢板(50mm规格)化学成分重量百分比为：C：0.10wt％，Si:0.52wt％，Mn：1.88wt％，P:0.014wt％，S:0.006wt％，Nb：0.070wt％，V：0.052wt％，Ti：0.035wt％，Cr：0.30wt％，Mo：0.40wt％，Alt：0.030wt％，N：0.005wt％；所述粗轧开轧温度1050℃；精轧开轧温度956℃，精轧终轧温度860℃，所述超快冷工艺保证钢板超快冷开冷温度为762℃，超快冷水压0.50MPa，冷却速度25℃/s,冷却后返红温度215℃；所述回火温度为576℃，回火时间为100min。Further, the chemical composition weight percent of the Q690D steel plate (50mm specification) with high and low temperature impact toughness is: C: 0.10wt%, Si: 0.52wt%, Mn: 1.88wt%, P: 0.014wt%, S: 0.006 wt%, Nb: 0.070wt%, V: 0.052wt%, Ti: 0.035wt%, Cr: 0.30wt%, Mo: 0.40wt%, Alt: 0.030wt%, N: 0.005wt%; The rolling temperature is 1050°C; the finish rolling start temperature is 956°C, and the finish rolling finish temperature is 860°C. The ultra-fast cooling process ensures that the ultra-fast cold start and cold temperature of the steel plate is 762°C, the ultra-fast cold water pressure is 0.50MPa, and the cooling rate is 25°C /s, the temperature of turning red after cooling is 215°C; the tempering temperature is 576°C, and the tempering time is 100min.
本发明通过将具有高低温冲击韧性的Q690D钢板使用低C钢设计、添加Nb、V、Ti元素来提高钢板强度，Cr、Mo元素提高淬透性，严格控制P、S、N及杂质元素，所述具有高低温冲击韧性Q690D钢板化学成分重量百分比为：C：0.05～0.10wt％，Si:0.40～0.60wt％，Mn：1.70～1.90wt％，P≤0.020wt％，S≤0.008wt％，Nb：0.02～0.10wt％，V：0.02～0.10wt％，Ti：0.03～0.08wt％，Cr：0.10～0.50wt％，Mo：0.30～0.50wt％，Alt：0.02～0.03wt％，N≤0.006wt％；基于上述合理成分设计下的工艺步骤中，粗轧开轧温度1000～1140℃；精轧开轧温度940～1000℃，精轧终轧温度850～890℃，本发明通过上述工艺生产出来Q690D钢板，在保证其高强度、轻量化的同时，也能确保其优良的塑性、韧性、折弯、焊接等综合性能，屈服强度ReL为730～763MPa、抗拉强度Rm为820～885MPa，延伸率A为15～20％，180°冷弯性能合格，综合性能优异、余量充足，并且-20℃低温冲击稳定在202～285J，确保其低温冲击韧性，很好的满足了用户的使用需求。In the present invention, the Q690D steel plate with high and low temperature impact toughness is designed with low C steel, and Nb, V, Ti elements are added to improve the strength of the steel plate, Cr, Mo elements improve hardenability, and strictly control P, S, N and impurity elements. The weight percentage of the chemical composition of the Q690D steel plate with high and low temperature impact toughness is: C: 0.05-0.10wt%, Si: 0.40-0.60wt%, Mn: 1.70-1.90wt%, P≤0.020wt%, S≤0.008wt% , Nb: 0.02～0.10wt%, V: 0.02～0.10wt%, Ti: 0.03～0.08wt%, Cr: 0.10～0.50wt%, Mo: 0.30～0.50wt%, Alt: 0.02～0.03wt%, N ≤0.006wt%; in the process steps based on the above-mentioned reasonable composition design, the starting temperature of rough rolling is 1000-1140°C; the starting temperature of finishing rolling is 940-1000°C, and the finishing rolling temperature is 850-890°C The Q690D steel plate produced by the process can not only ensure its high strength and light weight, but also ensure its excellent plasticity, toughness, bending, welding and other comprehensive properties. The yield strength ReL is 730~763MPa, and the tensile strength Rm is 820~ 885MPa, elongation A of 15-20%, qualified 180° cold bending performance, excellent comprehensive performance, sufficient margin, and stable low-temperature impact at -20°C at 202-285J, ensuring its low-temperature impact toughness, which satisfies users well usage requirements.
附图说明Description of drawings
图1为本发明的具有高低温冲击韧性Q690D钢板的实例5样品的-20℃冲击断口照片。Figure 1 is a photograph of the impact fracture at -20°C of Example 5 of the Q690D steel plate with high and low temperature impact toughness of the present invention.
具体实施方式Detailed ways
为了对本发明的技术特征、目的和效果有更加清楚的理解，现说明本发明。In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the present invention is now described.
本发明的目的是提供一种通过特定成分设计、合理的轧钢参数、超快冷冷却工艺、热处理回火工艺提供一种具有高低温冲击韧性Q690D钢板及其生产方法。The purpose of the present invention is to provide a Q690D steel plate with high and low temperature impact toughness and its production method through specific composition design, reasonable rolling parameters, ultra-fast cooling process, and heat treatment and tempering process.
一、为实现上述目的，本发明采用的技术方案如下：One, in order to achieve the above object, the technical scheme adopted in the present invention is as follows:
本发明通过将具有高低温冲击韧性的Q690D钢板使用低C钢设计、添加Nb、V、Ti元素来提高钢板强度，Cr、Mo元素提高淬透性，严格控制P、S、N及杂质元素，所述具有高低温冲击韧性Q690D钢板化学成分重量百分比为：C：0.05～0.10wt％，Si:0.40～0.60wt％，Mn：1.70～1.90wt％，P≤0.020wt％，S≤0.008wt％，Nb：0.02～0.10wt％，V：0.02～0.10wt％，Ti：0.03～0.08wt％，Cr：0.10～0.50wt％，Mo：0.30～0.50wt％，Alt：0.02～0.03wt％，N≤0.006wt％；In the present invention, the Q690D steel plate with high and low temperature impact toughness is designed with low C steel, and Nb, V, Ti elements are added to improve the strength of the steel plate, Cr, Mo elements improve hardenability, and strictly control P, S, N and impurity elements. The weight percentage of the chemical composition of the Q690D steel plate with high and low temperature impact toughness is: C: 0.05-0.10wt%, Si: 0.40-0.60wt%, Mn: 1.70-1.90wt%, P≤0.020wt%, S≤0.008wt% , Nb: 0.02～0.10wt%, V: 0.02～0.10wt%, Ti: 0.03～0.08wt%, Cr: 0.10～0.50wt%, Mo: 0.30～0.50wt%, Alt: 0.02～0.03wt%, N ≤0.006wt%;
所述具有高低温冲击韧性Q690D钢板生产方法工艺路线为：铁水预处理→转炉钢水冶→炉后吹氩→LF钢水精炼(钢包精炼)处理→RH钢水精炼(钢液真空循环脱气法钢水精炼)处理→板坯连铸→板坯加热→除鳞→粗轧→精轧→预矫直→超快冷工艺(UFC超快冷)→矫直→冷床→回火→取样→钢板检查→标记入库。其中，各阶段的工艺特点为：The process route of the production method of the Q690D steel plate with high and low temperature impact toughness is: molten iron pretreatment→converter molten steel smelting→argon blowing after the furnace→LF molten steel refining (ladle refining) treatment→RH molten steel refining (liquid steel vacuum circulation degassing method molten steel refining ) treatment → slab continuous casting → slab heating → descaling → rough rolling → finish rolling → pre-straightening → ultra-fast cooling process (UFC ultra-fast cooling) → straightening → cooling bed → tempering → sampling → steel plate inspection → Mark storage. Among them, the process characteristics of each stage are:
(1)转炉钢水冶炼：铁水脱硫，保证入炉铁水S≤0.010％，使用一类废钢，减少有害杂质元素外部输入；过程采用全程底吹氩气，转炉终点控制C≤0.06wt％，P≤0.015wt％。(1) Converter molten steel smelting: Desulfurization of molten iron to ensure that S≤0.010% of the molten iron enters the furnace, use first-class scrap steel to reduce external input of harmful impurity elements; the process uses argon blowing at the bottom of the whole process, and the end point of the converter is controlled C≤0.06wt%, P≤ 0.015 wt%.
(2)LF钢水精炼处理：钢水在LF炉进行脱硫、平衡温度、合金化处理以及去除夹杂物；最后一次合金化后必须保证3～20min的中等强度吹氩或强吹氩时间；精炼结束前软吹氩8～10min。(2) Refining treatment of LF molten steel: Desulfurization, temperature balance, alloying treatment and removal of inclusions are carried out on the molten steel in the LF furnace; after the last alloying, a medium-intensity argon blowing or strong argon blowing time must be guaranteed for 3 to 20 minutes; before the end of refining Softly blow argon for 8-10 minutes.
(3)RH钢水精炼处理：真空总循环时间15～20min，极限真空保持时间10min以上，净循环时间3min以上，钙处理后软吹氩时间8～10min。(3) RH molten steel refining treatment: the total vacuum cycle time is 15-20 minutes, the ultimate vacuum holding time is more than 10 minutes, the net cycle time is more than 3 minutes, and the soft argon blowing time after calcium treatment is 8-10 minutes.
(4)板坯连铸：中间包浇注温度为1524-1543℃，使用低合金钢结晶器保护渣，铸坯拉速为0.80～1.42m/min，使用电磁搅拌工艺，以降低板坯中心偏析、提高板坯内部质量。(4) Slab continuous casting: the pouring temperature of the tundish is 1524-1543°C, low-alloy steel mold powder is used, the cast slab casting speed is 0.80-1.42m/min, and the electromagnetic stirring process is used to reduce slab center segregation , Improve the internal quality of the slab.
(5)板坯加热：微合金元素Nb含量高，为保证钢中Nb的第二相充分固溶以便在后续的控轧控冷过程中充分析出更好的发挥强化作用，要控制好加热温度特别是均热段温度在1200℃以上、保证加热时间≥230min。板坯厚度为220mm，宽度为1810mm，成品厚度为6～50mm，宽度为2000～2600mm。(5) Slab heating: The content of microalloying element Nb is high. In order to ensure that the second phase of Nb in the steel is fully dissolved so that it can be fully analyzed in the subsequent controlled rolling and controlled cooling process to play a better role in strengthening, the heating temperature must be controlled. In particular, the temperature of the soaking section is above 1200°C, and the heating time is guaranteed to be ≥230min. The thickness of the slab is 220mm, the width is 1810mm, the thickness of the finished product is 6-50mm, and the width is 2000-2600mm.
(6)轧制工艺：粗轧开轧温度1000～1140℃，精轧开轧温度940～1000℃，精轧终轧温度850～890℃；使用高压水除鳞，减少表面氧化铁皮压入、麻点等缺陷，保证钢板表面质量。(6) Rolling process: the rough rolling start temperature is 1000-1140°C, the finish rolling start temperature is 940-1000°C, the finish rolling finish temperature is 850-890°C; use high-pressure water to descale, reduce surface oxide scale pressing, pitting and other defects to ensure the surface quality of the steel plate.
(7)超快冷工艺：为了避免终轧后、开冷前大量先共析块状铁素体的析出削弱组织强化的作用，终轧后需尽快进入超快冷冷却区，保证钢板超快冷开冷温度≥750℃，超快冷水压≥0.3MPa，冷却速度20～35℃/s，冷却后返红温度≤230℃。(7) Ultra-fast cooling process: In order to avoid the precipitation of a large amount of pro-eutectoid massive ferrite after final rolling and before cooling to weaken the structure strengthening effect, it is necessary to enter the ultra-fast cooling zone as soon as possible after final rolling to ensure that the steel plate is ultra-fast. Cold start and cold temperature ≥ 750°C, ultra-fast cold water pressure ≥ 0.3MPa, cooling speed 20-35°C/s, temperature of turning red after cooling ≤ 230°C.
(8)回火：钢板进行回火热处理，为保证组织和性能均匀性，回火温度570±10℃、回火时间为板厚+50min。(8) Tempering: The steel plate is subjected to tempering heat treatment. In order to ensure the uniformity of structure and performance, the tempering temperature is 570±10°C, and the tempering time is plate thickness + 50min.
二、实施例Two, the embodiment
(1)本发明的具有高低温冲击韧性Q690D钢板及其生产方法，采用下述成分配比。表1是各实施例产品的化学成分(按重量百分比计)。(1) The Q690D steel plate with high and low temperature impact toughness and its production method of the present invention adopt the following composition ratio. Table 1 is the chemical composition (by weight percentage) of each embodiment product.
表1：产品化学成分(wt％)Table 1: Product Chemical Composition (wt%)
(2)生产厚度为6～50mm规格的具有高低温冲击韧性Q690D钢板采用下述具体工艺，各实施例产品相对应的工艺参数见表2。(2) The production of Q690D steel plates with high and low temperature impact toughness with a thickness of 6-50 mm adopts the following specific processes, and the process parameters corresponding to the products of each example are shown in Table 2.
表2：各实施例具体的工艺参数Table 2: the specific process parameters of each embodiment
(3)根据以上工艺技术生产出来的Q690D钢板，钢板屈服强度ReL为730～763MPa、抗拉强度Rm为820～885MPa，延伸率A为15～20％，180°冷弯性能合格，综合性能优异、余量充足，并且-20℃低温冲击稳定在202～285J，详细力学性能见表3。(3) The Q690D steel plate produced according to the above process technology, the steel plate yield strength ReL is 730-763MPa, the tensile strength Rm is 820-885MPa, the elongation A is 15-20%, the 180° cold bending performance is qualified, and the comprehensive performance is excellent , The margin is sufficient, and the low-temperature impact at -20°C is stable at 202~285J. The detailed mechanical properties are shown in Table 3.
表3：各实施例产品力学性能Table 3: Mechanical properties of the products of each embodiment
(4)上述实例产品金相组织均为板条贝氏体及少量的针状铁素体混合组织，板条细小相互交叉，整个厚度截面上组织均匀，中心无明显偏析、微裂纹、分层现象；各类夹杂物≤1.0级，钢质纯净。(4) The metallographic structure of the product in the above example is a mixed structure of lath bainite and a small amount of acicular ferrite. The laths are small and intersect each other. Phenomenon; all kinds of inclusions ≤ 1.0 level, the steel is pure.
(5)图1为30mm厚度规格实例5样品的-20℃冲击断口照片，断面呈暗灰色纤维状、无光泽，为典型韧性断口宏观形貌，在扫描电镜下能观察明显较深韧窝特征，平均冲击功250J，低温冲击韧性性能优异。(备注说明：标准冲击试样厚度为10mm，而6mm规格冲击样品厚度只能为5mm，相应的要求值只需为标准样品的一半)。(5) Figure 1 is a photo of the -20°C impact fracture of the 30mm thickness specification Example 5 sample. The fracture surface is dark gray fibrous and dull, which is the macroscopic morphology of a typical ductile fracture. The characteristics of deep dimples can be observed under the scanning electron microscope. , Average impact energy 250J, excellent low temperature impact toughness. (Remarks: The thickness of the standard impact sample is 10mm, while the thickness of the 6mm impact sample can only be 5mm, and the corresponding required value only needs to be half of the standard sample).
本发明提供一种具有高低温冲击韧性Q690D钢板及其生产方法，通过本工艺技术生产出来的钢板，钢板金相组织、整板不同位置力学性能均匀性良好，屈服强度ReL为730～763MPa、抗拉强度Rm为820～885MPa，延伸率A为15～20％，180°冷弯性能合格，综合性能优异、余量充足，满足国家标准GB/T 1591-2008《低合金高强度结构钢》中牌号Q690D以及工程机械使用上的使用要求，并且-20℃低温冲击稳定在202～285J，远超标准的-20℃冲击≥47J，很好的满足了用户的使用需求。The invention provides a Q690D steel plate with high and low temperature impact toughness and a production method thereof. The steel plate produced by the process technology has good metallographic structure of the steel plate and good uniformity of mechanical properties at different positions of the whole plate, and the yield strength ReL is 730-763 MPa. The tensile strength Rm is 820~885MPa, the elongation A is 15~20%, the 180° cold bending performance is qualified, the comprehensive performance is excellent, the margin is sufficient, and it meets the national standard GB/T 1591-2008 "Low Alloy High Strength Structural Steel" The grade Q690D and the requirements for the use of construction machinery, and the low-temperature impact at -20°C is stable at 202~285J, far exceeding the standard -20°C impact ≥ 47J, which well meets the needs of users.
以上所述仅为本发明示意性的具体实施方式，并非用以限定本发明的范围。为本发明的各组成部分在不冲突的条件下可以相互组合，任何本领域的技术人员，在不脱离本发明的构思和原则的前提下所作出的等同变化与修改，均应属于本发明保护的范围。The above descriptions are only illustrative specific implementations of the present invention, and are not intended to limit the scope of the present invention. Because the various components of the present invention can be combined with each other under the condition of no conflict, any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the present invention shall belong to the protection of the present invention. range.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310288915.6A CN116334488A (en) | 2023-03-23 | 2023-03-23 | A kind of Q690D steel plate with high and low temperature impact toughness and its production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310288915.6A CN116334488A (en) | 2023-03-23 | 2023-03-23 | A kind of Q690D steel plate with high and low temperature impact toughness and its production method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116334488A true CN116334488A (en) | 2023-06-27 |
Family
ID=86888986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310288915.6A Pending CN116334488A (en) | 2023-03-23 | 2023-03-23 | A kind of Q690D steel plate with high and low temperature impact toughness and its production method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116334488A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103225042A (en) * | 2013-05-13 | 2013-07-31 | 湖南华菱湘潭钢铁有限公司 | Production method of easily-shaped high-strength medium-thickness steel plate |
| CN103667963A (en) * | 2013-12-06 | 2014-03-26 | 武汉钢铁(集团)公司 | Low-carbon bainite construction steel with yield ratio of less than 0.8 and production method thereof |
| CN105296731A (en) * | 2015-11-12 | 2016-02-03 | 内蒙古包钢钢联股份有限公司 | Production method capable of improving impact toughness of thick-specification high-strength steel plate |
| CN107119237A (en) * | 2017-05-05 | 2017-09-01 | 内蒙古包钢钢联股份有限公司 | The production method of Q690D medium plates and reduction Q690D medium plate energy consumptions |
| CN108728731A (en) * | 2017-04-24 | 2018-11-02 | 鞍钢股份有限公司 | X80 pipeline steel plate for transporting coal-made natural gas and manufacturing method thereof |
| CN108950380A (en) * | 2018-06-11 | 2018-12-07 | 南京钢铁股份有限公司 | A kind of Q690GJ building sheet and preparation method thereof |
| CN112553530A (en) * | 2020-12-04 | 2021-03-26 | 安阳钢铁股份有限公司 | Low-yield-ratio 700MPa high-strength bridge steel and manufacturing method thereof |
| CN113025894A (en) * | 2021-02-22 | 2021-06-25 | 北京科技大学 | Ultrahigh-strength Q960 hot-rolled coil produced on line by short-process technology and preparation method thereof |
| CN115287530A (en) * | 2022-06-22 | 2022-11-04 | 河钢股份有限公司 | High-welding-performance 700 MPa-grade rare earth high-strength structural steel and production method thereof |
-
2023
- 2023-03-23 CN CN202310288915.6A patent/CN116334488A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103225042A (en) * | 2013-05-13 | 2013-07-31 | 湖南华菱湘潭钢铁有限公司 | Production method of easily-shaped high-strength medium-thickness steel plate |
| CN103667963A (en) * | 2013-12-06 | 2014-03-26 | 武汉钢铁(集团)公司 | Low-carbon bainite construction steel with yield ratio of less than 0.8 and production method thereof |
| CN105296731A (en) * | 2015-11-12 | 2016-02-03 | 内蒙古包钢钢联股份有限公司 | Production method capable of improving impact toughness of thick-specification high-strength steel plate |
| CN108728731A (en) * | 2017-04-24 | 2018-11-02 | 鞍钢股份有限公司 | X80 pipeline steel plate for transporting coal-made natural gas and manufacturing method thereof |
| CN107119237A (en) * | 2017-05-05 | 2017-09-01 | 内蒙古包钢钢联股份有限公司 | The production method of Q690D medium plates and reduction Q690D medium plate energy consumptions |
| CN108950380A (en) * | 2018-06-11 | 2018-12-07 | 南京钢铁股份有限公司 | A kind of Q690GJ building sheet and preparation method thereof |
| CN112553530A (en) * | 2020-12-04 | 2021-03-26 | 安阳钢铁股份有限公司 | Low-yield-ratio 700MPa high-strength bridge steel and manufacturing method thereof |
| CN113025894A (en) * | 2021-02-22 | 2021-06-25 | 北京科技大学 | Ultrahigh-strength Q960 hot-rolled coil produced on line by short-process technology and preparation method thereof |
| CN115287530A (en) * | 2022-06-22 | 2022-11-04 | 河钢股份有限公司 | High-welding-performance 700 MPa-grade rare earth high-strength structural steel and production method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112981235B (en) | Hardened and tempered steel plate with yield strength of 420MPa grade for building structure and production method thereof | |
| CN113846260B (en) | Production method of high-strength steel plate for engineering machinery | |
| AU2015353251B2 (en) | Low-alloy high-strength high-tenacity steel panel and method for manufacturing same | |
| CN101440461B (en) | A kind of oil well gas corrosion-resistant sucker rod steel and its manufacturing method | |
| CN105385951B (en) | Have the production method of the NM500 wear-resisting steel plates of high hardness high toughness concurrently | |
| CN105296731B (en) | Lift the production method of think gauge high strength steel plate impact flexibility | |
| WO2016095721A1 (en) | Quenched-tempered high-strength steel with yield strength of 900 mpa to 1000 mpa grade, and manufacturing method therefor | |
| CN113430458B (en) | Ultrahigh-strength steel plate with yield strength of more than 1040MPa and manufacturing method thereof | |
| CN105925904B (en) | The excellent steel plate containing Mo of a kind of high-temp and high-strength, low-temperature impact toughness and its manufacture method | |
| CN108070779A (en) | A kind of solderable fine grain, high strength degree structural steel and iron and its production method | |
| CN105803334B (en) | Tensile strength 700MPa level hot rolling Multiphase Steels and its production method | |
| CN114134388B (en) | Thin-specification ultrahigh-strength steel plate with 1300 MPa-level tensile strength and manufacturing method thereof | |
| WO2020038244A1 (en) | 80mm-thick low-cost fh420 marine steel plate and manufacturing method therefor | |
| CN108559917A (en) | A kind of yield strength 1100MPa grades of Ultra-fine Grained high strength steel plates and its manufacturing method | |
| CN106636911A (en) | 900MPa hot rolling sheet steel formed by directly rolling sheet billets and manufacturing method thereof | |
| CN109628828A (en) | A kind of low yield strength ratio super thick water power high-strength steel sheet and its manufacturing method | |
| CN106282774A (en) | A kind of high transverse and longitudinal impact ratio big thickness Q690E high-strength steel production method | |
| CN109207858B (en) | Production method of low-alloy ultrahigh-strength steel Q1100E sheet | |
| CN106086657A (en) | A kind of yield strength ultra high-strength structural steel plate more than 1300MPa and preparation method thereof | |
| CN111763883A (en) | Steel for hollow stabilizer bar and production method thereof | |
| EP4435129A1 (en) | Wide and heavy steel plate having ultrahigh strength and containing rare earth and preparation method therefor | |
| CN104404377A (en) | High-strength steel plate with excellent cold forming property and manufacturing method of high-strength steel plate | |
| CN104018089B (en) | High-strength high-toughness steel plate with yield strength 890Mpa grade and method for producing same | |
| WO2019222988A1 (en) | Ultra-fine grained high-strength steel plate with 1100 mpa-grade yield strength and production method thereof | |
| CN106756544A (en) | A kind of production method of the big thickness Q690D high-strength steel of ultralow carbon equivalent |
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 |