WO2022067962A1 - 低成本高性能Q370qE-HPS桥梁钢及生产方法 - Google Patents

低成本高性能Q370qE-HPS桥梁钢及生产方法 Download PDF

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WO2022067962A1
WO2022067962A1 PCT/CN2020/126500 CN2020126500W WO2022067962A1 WO 2022067962 A1 WO2022067962 A1 WO 2022067962A1 CN 2020126500 W CN2020126500 W CN 2020126500W WO 2022067962 A1 WO2022067962 A1 WO 2022067962A1
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residual
performance
q370qe
hps
low
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PCT/CN2020/126500
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English (en)
French (fr)
Chinese (zh)
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祝瑞荣
翟冬雨
洪君
丁叶
李翔
高燕
张媛钰
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南京钢铁股份有限公司
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Priority to KR1020237010905A priority Critical patent/KR20230059826A/ko
Priority to JP2023519218A priority patent/JP2023542426A/ja
Publication of WO2022067962A1 publication Critical patent/WO2022067962A1/zh

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
    • B21C51/005—Marking devices
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • 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
    • C22C38/26—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
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4606—Lances or injectors
    • C21C2005/4626—Means for cooling, e.g. by gases, fluids or liquids
    • 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
    • C21D2211/001—Austenite
    • 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

Definitions

  • the invention relates to the technical field of iron and steel production, in particular to a low-cost high-performance Q370qE-HPS bridge steel and a production method.
  • High-performance bridge steel plate Q370qE-HPS is widely used in highway bridges, railway bridges, and highway-railway bridges. Since 2010, under the background of the country's vigorous development of transportation construction and the continuous increase of bridge steel
  • the normalized steel plate mainly used in steel the smelting process cost of the normalizing heat treatment process is more than 200 yuan, not including the cost of transportation. Or quality problems such as penetration fillet weld laminar tearing.
  • the present invention provides a low-cost high-performance Q370qE-HPS bridge steel, whose chemical composition and mass percentage are as follows: C: 0.05%-0.08%, Si: 0.10%-0.40%, Mn: 1.61%- 1.70%, P ⁇ 0.015%, S ⁇ 0.0030%, Nb: 0.030% ⁇ 0.050%, Ti: 0.010% ⁇ 0.018%, residual Ni ⁇ 0.05%, Cr: 0.20% ⁇ 0.30%, residual Mo ⁇ 0.05%, residual Cu ⁇ 0.05%, residual B ⁇ 0.05%, N ⁇ 0.005%, Al: 0.020% ⁇ 0.050%, the balance is Fe and impurities.
  • the present invention obtains more ferrite structure through the unique low-carbon micro-niobium-titanium alloyed bridge composition design, which promotes the soft structure of the product. Formation, effectively increase the temperature of the second opening and the final rolling, properly judge the grain size of the structure, and stabilize the yield strength of the product. Through the conditions of water cooling, the structure transformation of carbide and chromium elements is promoted, and the yield strength is reduced while improving the tensile strength of the product. strength, effectively reducing the yield-to-tensile ratio of the product.
  • the low-cost high-performance Q370qE-HPS bridge steel mentioned above has a plate thickness of 16-30mm, and its chemical composition and mass percentage are as follows: C: 0.05%-0.07%, Si: 0.10%-0.20%, Mn: 1.61%-1.65 %, P ⁇ 0.015%, S ⁇ 0.0030%, Nb: 0.030% ⁇ 0.040%, Ti: 0.010% ⁇ 0.015%, residual Ni ⁇ 0.05%, Cr: 0.20% ⁇ 0.30%, residual Mo ⁇ 0.05%, residual Cu ⁇ 0.05%, residual B ⁇ 0.05%, N ⁇ 0.005%, Al: 0.020% ⁇ 0.050%, the balance is Fe and impurities.
  • the low-cost high-performance Q370qE-HPS bridge steel mentioned above has a plate thickness of 30-50mm, and its chemical composition and mass percentage are as follows: C: 0.06%-0.08%, Si: 0.15%-0.25%, Mn: 1.63%-1.68 %, P ⁇ 0.015%, S ⁇ 0.0030%, Nb: 0.040% ⁇ 0.050%, Ti: 0.010% ⁇ 0.015%, residual Ni ⁇ 0.05%, Cr: 0.20% ⁇ 0.30%, residual Mo ⁇ 0.05%, residual Cu ⁇ 0.05%, residual B ⁇ 0.0005%, N ⁇ 0.005%, Al: 0.020% ⁇ 0.050%, the balance is Fe and impurities.
  • the aforementioned low-cost and high-performance Q370qE-HPS bridge steel has a plate thickness of 50-60mm, and its chemical composition and mass percentage are as follows: C: 0.06%-0.08%, Si: 0.20%-0.40%, Mn: 1.65%-1.70 %, P ⁇ 0.015%, S ⁇ 0.0030%, Nb: 0.040% ⁇ 0.050%, Ti: 0.010% ⁇ 0.015%, residual Ni ⁇ 0.05%, Cr: 0.20% ⁇ 0.30%, residual Mo ⁇ 0.05%, residual Cu ⁇ 0.05%, residual B ⁇ 0.0005%, N ⁇ 0.005%, Al: 0.020% ⁇ 0.050%, the balance is Fe and impurities.
  • the microstructure of the steel plate includes ferrite, pearlite and 10% to 30% bainite.
  • Another object of the present invention is to provide a production method of low-cost and high-performance Q370qE-HPS bridge steel without tempering treatment, including preparing materials according to the composition design system ratio ⁇ molten iron pretreatment ⁇ top and bottom double blowing converter smelting ⁇ LF furnace Refining ⁇ RH vacuum treatment ⁇ slab casting ⁇ walking furnace heating ⁇ high-pressure water descaling ⁇ controlled rolling and cooling ⁇ post-rolling treatment,
  • Controlled rolling and cooling process the austenite temperature is 1100-1110°C
  • the thickness of the hot billet is adjusted by 2-4 times according to the thickness of the steel plate
  • the second opening temperature is adjusted to 820-990°C according to the thickness of the order
  • the final rolling temperature is 820 ⁇ 20°C.
  • Ultra-fast cooling to 560 ⁇ 590 °C, after the steel plate is cooled, it will be taken off the line in time and put into the slow cooling pit for stack cooling. After 24 hours of stack cooling, shearing, marking, surface inspection, flaw detection, and storage will be performed.
  • the present invention adopts high manganese chromium element, low carbon micro-niobium titanium alloy composition design according to Chinese national standard GB/T 714 structural bridge steel, adopts TMCP rolling technology to replace traditional TMCP+tempering process, Effectively reduce the cost of product manufacturing and greatly improve the competitiveness of enterprises;
  • the low-temperature austenitizing technology adopted in the present invention reduces the grain size of the prior austenite and ensures the stability of the low-temperature impact toughness of the product;
  • the present invention effectively reduces the yield strength of the product, ensures the stability of the tensile strength, and stabilizes the stability of the yield strength ratio of the product by controlling the second opening temperature and the final rolling temperature and cooperating with the water cooling process;
  • the structure transformation is reasonably carried out, and the structure including ferrite, pearlite and 10% to 30% bainite is obtained, and the harm of the banded structure is reduced. , to avoid the accumulation of harmful elements and hard phase structure in the heart, and improve the product's pass rate of flaw detection and the stability of welding performance;
  • the present invention refines the structure and grain size through the design of high manganese chromium elements, ensures the stability of the tensile strength of the product, and ensures the yield-to-strength ratio of the product by controlling the second opening temperature and the final rolling temperature;
  • the present invention effectively solves the problem of uneven internal stress of the product by stacking the steel plate, and ensures the cutting and processing stability of the customer.
  • FIG. 1 is a typical microstructure diagram of the steel sheet obtained in Example 1 under a metallographic microscope.
  • a low-cost and high-performance Q370qE-HPS bridge steel provided in the following example, the thickness of the steel plate is 22mm, 33mm, and 55mm, and its chemical composition and mass percentage are shown in Table 1.
  • Example 2 0.07 0.20 1.65 0.011 0.001 0.045 0.012 element Ni Cr Mo Cu B N Al
  • Example 2 0.02 0.26 0.008 0.03 0.0003 0.0038 0.028 element C Si Mn P S Nb Ti
  • Example 3 0.075 0.36 1.69 0.010 0.001 0.048 0.015 element Ni Cr Mo Cu B N Al
  • Example 3 0.04 0.28 0.010 0.01 0.0002 0.0042 0.033 .
  • the production method includes the following steps: preparing materials according to the above-mentioned composition design system proportioning ⁇ molten iron pretreatment ⁇ top and bottom double blowing converter smelting ⁇ LF furnace refining ⁇ RH vacuum treatment ⁇ slab casting ⁇ stepping furnace heating ⁇ high-pressure water descaling ⁇ controlled rolling Cooling ⁇ post-rolling treatment, the austenite temperature is 1100 ⁇ 1110°C, the thickness of the hot billet is adjusted by 2 ⁇ 4 times according to the thickness of the steel plate, the second opening temperature is adjusted according to the thickness of the order to 820 ⁇ 990°C, and the final rolling temperature is 820 ⁇ 20°C. Use ultra-fast cooling to cool to 560 ⁇ 590 °C.
  • the specific rolling process is shown in Table 2, and the performance is shown in Table 3.
  • Example Yield strength R El /MPa Tensile strength R m /MPa Elongation after break A/% yield strength ratio
  • Example 1 420 530 26 79 Example 2 412 526 twenty three 78
  • Example 3 450 560 twenty two 80
  • Example Shock temperature/°C Average shock absorption energy/J 180° bending test Bending result Example 1 -40 230 3a No cracks
  • the present invention adopts the TMCP rolling technology and applies a short-flow and low-cost manufacturing method to effectively eliminate the internal stress of the steel plate.
  • the developed Q370qE-HPS bridge steel satisfies the bridge factory's high-performance bridge steel plate with easy welding, high toughness and stable quality. Through cost optimization, the product manufacturing cost is effectively reduced, the competitiveness of the enterprise is improved, and the economic benefit of the enterprise is increased.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
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  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Heat Treatment Of Steel (AREA)
PCT/CN2020/126500 2020-09-29 2020-11-04 低成本高性能Q370qE-HPS桥梁钢及生产方法 WO2022067962A1 (zh)

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KR1020237010905A KR20230059826A (ko) 2020-09-29 2020-11-04 저원가 고성능 Q370qE-HPS 교량강 및 생산 방법
JP2023519218A JP2023542426A (ja) 2020-09-29 2020-11-04 低コスト高性能Ｑ３７０ｑＥ‐ＨＰＳ橋梁用鋼および生産方法

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CN115261726A (zh) * 2022-08-04 2022-11-01 江苏省沙钢钢铁研究院有限公司 特厚Q370qE桥梁钢板及其生产方法
CN116377327A (zh) * 2023-04-03 2023-07-04 江苏沙钢集团有限公司 一种经济型q390md钢板及其生产方法
CN117604223A (zh) * 2023-12-21 2024-02-27 河北普阳钢铁有限公司 一种低成本370MPa级耐候桥梁钢板生产方法

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CN113025879B (zh) * 2021-02-01 2022-03-01 南京钢铁股份有限公司 一种耐候桥梁钢及其冶炼方法
CN113186454B (zh) * 2021-03-30 2022-03-29 湖南华菱湘潭钢铁有限公司 一种回火型低屈强比桥梁钢的生产方法
CN113234999B (zh) * 2021-04-27 2022-05-20 南京钢铁股份有限公司 一种高效焊接桥梁钢及其制造方法

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CN108103393A (zh) * 2017-06-01 2018-06-01 海宁瑞奥金属科技有限公司 一种高强度高韧性桥梁钢焊接接头的焊缝金属
CN110106441A (zh) * 2019-05-14 2019-08-09 南京钢铁股份有限公司 TMCP型屈服370MPa高性能桥梁钢板及生产方法
CN110306111A (zh) * 2019-07-17 2019-10-08 张家港宏昌钢板有限公司 一种厚规格钢板及其制造方法

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CN115261726A (zh) * 2022-08-04 2022-11-01 江苏省沙钢钢铁研究院有限公司 特厚Q370qE桥梁钢板及其生产方法
CN116377327A (zh) * 2023-04-03 2023-07-04 江苏沙钢集团有限公司 一种经济型q390md钢板及其生产方法
CN117604223A (zh) * 2023-12-21 2024-02-27 河北普阳钢铁有限公司 一种低成本370MPa级耐候桥梁钢板生产方法

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