WO2021057117A1 - 一种轧制超级奥氏体不锈钢的方法 - Google Patents

一种轧制超级奥氏体不锈钢的方法 Download PDF

Info

Publication number
WO2021057117A1
WO2021057117A1 PCT/CN2020/096958 CN2020096958W WO2021057117A1 WO 2021057117 A1 WO2021057117 A1 WO 2021057117A1 CN 2020096958 W CN2020096958 W CN 2020096958W WO 2021057117 A1 WO2021057117 A1 WO 2021057117A1
Authority
WO
WIPO (PCT)
Prior art keywords
rolling
stainless steel
thickness
austenitic stainless
super austenitic
Prior art date
Application number
PCT/CN2020/096958
Other languages
English (en)
French (fr)
Inventor
张淼
郑明哲
孙旭东
车超
黄龙
樊卫
邓飞翔
Original Assignee
南京钢铁股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 南京钢铁股份有限公司 filed Critical 南京钢铁股份有限公司
Priority to KR1020227010554A priority Critical patent/KR20220061151A/ko
Priority to EP20866991.1A priority patent/EP4035787A4/en
Publication of WO2021057117A1 publication Critical patent/WO2021057117A1/zh

Links

Classifications

    • 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
    • B21B1/38—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 sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
    • 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
    • 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
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • 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
    • B21B37/58—Roll-force control; Roll-gap control
    • 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
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/004—Heating the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
    • 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
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
    • 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
    • C21D8/021—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular fabrication or treatment of ingot or slab
    • 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
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0242—Flattening; Dressing; Flexing
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • 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

Definitions

  • the invention belongs to the technical field of steel rolling, and specifically relates to a method for rolling super austenitic stainless steel.
  • NAS 254NM (UNS N08367 equivalent) is a highly corrosion-resistant stainless steel containing high chromium and high molybdenum. This steel grade specification maintains good corrosion resistance even in the harsh environment of high temperature, sea water or flue gas, and desulfurization equipment. In some environments, it can be comparable to Hastelloy and titanium plates. It is a highly economical stainless steel with high corrosion resistance.
  • N08367 contains 21% Cr and 6% Mo, so the deformation resistance in the high temperature range is 2.5-3 times larger than that of ordinary steel.
  • the rolling pressure is too large. As the width increases, The load is further increased. According to the existing rolling process, the rolling of extremely thin gauges cannot be carried out, the rolling is interrupted or the plate shape is poor, and genuine products cannot be received.
  • the purpose of the invention In order to overcome the problems of rolling thin-gauge super austenitic stainless steel in the prior art, the rolling can not continue under excessive load, the plate shape is extremely poor, and the product cannot be obtained.
  • the present invention provides a rolled super austenitic stainless steel.
  • the stainless steel method can roll super austenitic stainless steel with a thickness of 10mm or less and a width of 2500mm or more.
  • the method of rolling super austenitic stainless steel according to the present invention includes the following steps:
  • the minimum thickness of the blank that can be loaded into the heating furnace is determined according to the minimum thickness of the blank that can be measured by the laser detector in the heating furnace.
  • the blanking process is adopted to make it reach the design thickness of the blank selection.
  • the positions of the upper and lower beams are adjusted during steel burning to ensure the neutral position during the steel burning process. Improve the uniformity of steel plate temperature.
  • step (3) in the descaling process, it is ensured that the temperature of the upper surface is higher than that of the lower surface. Prevent the steel plate from prying the head.
  • the roll gap parameter setting of the rolling mill is not less than 3.5 mm. Avoid that when the setting is less than 3.5mm, the CVC cannot move in place due to the rolling force of the rolling mill and cannot move, making it difficult to carry out rolling.
  • the thermal expansion coefficient of the stainless steel is set to 1.0133 ⁇ 10 -2
  • the thermal expansion coefficient of the stainless steel is set Set it as 1.0285 ⁇ 10 -2 .
  • the roll gap is manually pressed down by 1-1.5 mm.
  • the method optimizes the technology of blank selection, steel burning process, descaling process, steel rolling process, and straightening process. It can roll super austenitic stainless steel with a thickness of 10mm or less and a width of 2500mm or more, and successfully roll N08367 steel plates with a thickness of 8.5mm, width of 2510mm and 2610mm. This specification is the widest in the world under this thickness, filling The N08367 steel grade is blank in the width range of 2510-2610mm under the thickness of 8.5mm, and the rolled plate shape is stable, and the rolling power reaches 95.4%. In addition, N08904 stainless steel with a thickness of 10.0mm and a width of 2620-2980mm was successfully rolled.
  • a method for rolling super austenitic stainless steel includes the following steps:
  • the deformation resistance of super austenitic stainless steel at high temperature is 2.5-3 times that of ordinary products.
  • the development of ultra-wide and thin specifications is in terms of material type selection.
  • the minimum number of passes must be ensured to meet the rolling thickness requirements.
  • the minimum billet design principle is adopted, that is, the smallest thickness billet that can be loaded into the heating furnace.
  • the minimum thickness of the blank that can be loaded into the heating furnace is determined according to the minimum thickness of the blank that can be measured by laser inspection in the heating furnace.
  • the measurable minimum thickness is 115mm.
  • a blank with a thickness of 115mm, a width of 1780mm, and a length of 2610mm is used.
  • the billeting process is first carried out to a thickness of 115mm to reduce the total number of rolling passes in the subsequent processes.
  • the billet is fired at 1250-1270°C, and the temperature difference between the upper and lower surfaces of the billet is strictly controlled at 25-35°C to ensure that the steel plate does not change during the rolling process. Result in warped head. And adjust the position of the upper and lower beams to ensure the neutral position during the steel burning process, and improve the temperature uniformity of the steel plate.
  • the final rolling temperature is required to be above 850°C to avoid a sharp increase in deformation resistance below 850°C.
  • the rolling pass adopts 12-pass rolling, which breaks the limitation of 9-pass rolling for thin gauges in the traditional process.
  • the reduction in the last two passes of rolling is less than 0.8mm to avoid excessive reduction, which may cause the roll gap of the rolling mill to exceed the equipment limit during actual rolling, making it difficult to carry out rolling.
  • the roll gap parameter setting of the rolling mill is not less than 3.5mm, so as to avoid that the CVC cannot be moved due to the rolling force of the rolling mill when the setting is too small, resulting in failure to move in place.
  • the two-level model system optimizes the coefficients under different thicknesses based on the deformation resistance at different temperatures, and at the same time adjusts a specific pass individually. That is, in order to ensure the measurement accuracy of the thickness gauge, the thermal expansion coefficient of the stainless steel under different passes is adjusted separately according to the deformation resistance at different temperatures. Specifically, the lower 873 deg.] C, adjusted by the coefficient 1.0132 ⁇ 10 -2 to 1.0133 ⁇ 10 -2, at 880 deg.] C, the coefficient is adjusted to 1.0284 ⁇ 10 -2 1.0285 ⁇ 10 -2, to ensure that the thickness of two self-learning model Correction accuracy.
  • Straightening process adopt the multi-pass straightening method of the pre-straightening machine, and increase the straightening pressure by 1000-1500 tons according to the plate shape. If the straightening force is too small, it has no effect. If the straightening force is too small, it will exceed the limit of the equipment. During operation, pressing down 0.1mm increases the pressure by about 100 tons, which corresponds to manual pressing down of the roll gap 1-1.5mm.
  • Rolling specifications (thickness * width) mm*mm Total number of rolling blocks Number of successfully rolled blocks Pass rate 8.5*2510 17 17 100% 8.5*2610 70 66 94.3% total 87 83 95.4%
  • Rolling specifications (thickness * width) mm*mm Total number of rolling blocks Number of successfully rolled blocks Pass rate 10.0*2620 8 8 100% 10.0*2820 10 10 100% 10.0*2980 2 2 100% total 20 20 100%
  • the rolling method of the present invention can roll steel that meets the performance index requirements of N08904 with a thickness of 10.0 mm, and also has a higher success rate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Metal Rolling (AREA)
  • Heat Treatment Of Steel (AREA)
  • Control Of Metal Rolling (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)

Abstract

一种轧制超级奥氏体不锈钢的方法，包括坯料选型、烧钢工序、除鳞工序、轧钢工序、矫直工序；该方法实现轧制厚度10mm以下、宽度2500mm以上规格的超级奥氏体不锈钢，并成功轧制厚度8.5mm、宽度2510mm和2610mm规格的N08367钢种钢板，填补了N08367钢种在8.5mm厚度下2510-2610mm的宽度范围的空白，且轧制的板型稳定，轧制成功率达到95.4％。

Description

一种轧制超级奥氏体不锈钢的方法 技术领域
本发明属于轧钢技术领域，具体涉及一种轧制超级奥氏体不锈钢的方法。
背景技术
NAS 254NM(UNS N08367等同)是含有高铬，高钼的高耐腐蚀不锈钢。本钢种规格即使在高温，海水或者烟气、脱硫设备的苛刻环境下仍保持良好的耐腐蚀性。某些环境下可以和哈氏合金以及钛板相媲美，是具有高耐腐蚀性的高经济性不锈钢。
N08367含有21％的Cr和6％的Mo，因此在高温范围中变形抗力比普通钢种大2.5-3倍，薄规格轧制到低温段时，轧制压力过大，随着宽度的增加，负载进一步增大，按照现有轧制工艺，极薄规格的轧制进行不下去，轧制中断或者板形差，无法收得正品。
发明内容
发明目的：为了克服现有技术轧制薄规格超级奥氏体不锈钢时，负载过大轧制不下去、板形极差、无法收得正品的问题，本发明提供一种轧制超级奥氏体不锈钢的方法，该方法能够轧制厚度10mm以下、宽度2500mm以上规格的超级奥氏体不锈钢。
技术方案：本发明所述的一种轧制超级奥氏体不锈钢的方法，包括如下步骤：
(1)坯料选型：在保证满足轧制厚度需求的情况下，采用最小坯料设计原则，选用加热炉可装入的最小厚度坯料；
(2)烧钢工序：在1250-1270℃下对坯料进行烧钢，控制上、下表面温度差25-35℃；
(3)除鳞工序：坯料在经过粗除鳞和精除鳞时均不进行除鳞操作，保持上、下表面温差；
(4)轧钢工序：控制终轧温度在850℃以上；采用12道次轧制，轧制的最后两个道次的压下量小于0.8mm；轧制时根据不同温度的变形抗力，优化不同厚度下的热膨胀系数，对不同道次下该不锈钢的热膨胀系数进行单独调整；
(5)矫直工序：采用预矫直机多道次矫直方式，增加矫直压力1000-1500 吨，以保证最终板型平直度。
所述步骤(1)中，坯料选型时，加热炉可装入的最小厚度坯料根据加热炉内激光检测仪能够测得的最小坯料厚度确定。
进一步的，对于大于设计厚度的原始坯料采用开坯处理，使其达到坯料选型的设计厚度。
所述步骤(2)中，烧钢时调整上下梁位置在烧钢过程中保证中位。提高钢板温度的均匀性。
所述步骤(3)，在除鳞工序中，保证上表面比下表面的温度高。防止钢板撬头。
所述步骤(4)中，轧机辊缝参数设定不小于3.5mm。避免因设定小于3.5mm时，CVC因轧机有轧制力无法窜动而导致不能动作到位，使轧制难以进行。
所述步骤(4)中，当温度在873℃以下时，将该不锈钢的热膨胀系数设定为1.0133×10 -2，当温度大于873摄氏度且在880℃以下时，将该不锈钢的热膨胀系数设定为1.0285×10 -2。
所述步骤(5)中，根据板型情况，手动下压辊缝1-1.5mm。
有益效果：该方法通过对坯料选型、烧钢工序、除鳞工序、轧钢工序、矫直工序进行技术优化。可实现轧制厚度10mm以下、宽度2500mm以上规格的超级奥氏体不锈钢，并成功轧制厚度8.5mm、宽度2510mm和2610mm规格的N08367钢种钢板，此规格为该厚度下世界最宽，填补了N08367钢种在8.5mm厚度下2510-2610mm的宽度范围的空白，且轧制的板型稳定，轧制成功率达到95.4％。另外还成功轧制了10.0mm厚度，2620-2980mm宽度范围的N08904不锈钢。
具体实施方式
一种轧制超级奥氏体不锈钢的方法，包括如下步骤：
(1)坯料选型：
超级奥氏体不锈钢高温下变形抗力是普通产品的2.5-3倍，开发超宽、薄规格在料型选择上，为了保证轧制成功率，采用最少道次，需保证满足轧制厚度需求的情况下，采用最小坯料设计原则，即加热炉可装入的最小厚度坯料。
具体的，加热炉可装入的最小厚度坯料根据加热炉内激光检可以测得的最小 坯料厚度确定。例如，可测的最小厚度为115mm，当轧制厚度8.5mm、宽度2610mm规格钢板时，采用厚度115mm、宽度1780mm、长度2610mm的坯料。对于142mm厚度的原始坯料先进行开坯处理至115mm厚度，以减少后道工序的总轧制道次。
(2)烧钢工序：
利用超级奥氏体不锈钢在高温下容易氧化的特点，在1250-1270℃下对坯料进行烧钢，同时严格控制控制坯料的上、下表面温度差25-35℃，保证轧制过程中钢板不产生翘头。并且调整上下梁位置在烧钢过程中保证中位，提高钢板温度均匀性。
(3)除鳞工序：
利用超级奥氏体不锈钢在高温下不容易氧化的特点，打破钢坯正常生产工序必须除鳞的工艺方式，坯料在经过粗除鳞和轧机精除鳞时都不进行除鳞操作，保持上、下表面温差，防止因除鳞造成的钢板翘头。
(4)轧钢工序：
要求终轧温度在850℃以上，避免在850℃以下变形抗力的急剧提升。
根据轧制扭矩、轧制力的最大分配，轧制道次采用12道次轧制，打破传统工艺中薄规格必须采用9道次轧制的局限。
并且，轧制的最后两个道次的压下量小于0.8mm，避免压下量过大，导致实际轧制时，轧机辊缝超过设备极限，导致轧制难以进行。同时保证轧机辊缝参数设定不小于3.5mm，避免设定过小时CVC因轧机有轧制力无法窜动，导致不能动作到位。
二级模型系统依据不同温度下的变形抗力，优化不同厚度下的系数，同时对某一特定道次单独调整。也即是，为保证测厚仪的测量精度，根据不同温度的变形抗力，对不同道次下该不锈钢的热膨胀系数进行单独调整。具体的，将873℃下，系数由1.0132×10 -2调整为1.0133×10 -2，880℃下，系数由1.0284×10 -2调整为1.0285×10 -2，确保二级模型对厚度自学习修正的准确性。
(5)矫直工序：采用预矫直机多道次矫直方式，并根据板型情况，增加矫直压力1000-1500吨。矫直力过小没有效果，过大会超过设备极限，操作时下压0.1mm约增加100吨压力，则对应为手动下压辊缝1-1.5mm。
采用上述方法，轧制N08367钢种成功将宽度突破到2610mm。具体实施的轧制规程如表1所示：
表1 8.5mm厚度N08367轧制规程表
Figure PCTCN2020096958-appb-000001
轧制规格及成功率如表2所示：
表2 8.5mm厚度N08367轧制合格率
轧制规格(厚*宽)mm*mm 轧制总块数 轧制成功块数 合格率
8.5*2510 17 17 100％
8.5*2610 70 66 94.3％
合计 87 83 95.4％
该钢种、规格性能指标要求见表3所示：
表3 8.5mm厚度N08367性能指标要求
Figure PCTCN2020096958-appb-000002
该钢种、规格的实际性能指标见表4：
表4 8.5mm厚度N08367实际性能指标
Figure PCTCN2020096958-appb-000003
可见，采用本发明的轧制方法，能够轧制出符合8.5mm厚度N08367 性能指标要求的钢，且具有较高的成功率。
并且，采用上述方法成功开发了同系列钢种N08904的10*2620mm、10*2820mm、10*2980mm等极限规格。其轧制规格及成功率如表5所示：
表5 10.0mm厚度N08904轧制合格率
轧制规格(厚*宽)mm*mm 轧制总块数 轧制成功块数 合格率
10.0*2620 8 8 100％
10.0*2820 10 10 100％
10.0*2980 2 2 100％
合计 20 20 100％
该钢种、规格性能指标要求见表6所示：
表6 10.0mm厚度N08904性能指标要求
Figure PCTCN2020096958-appb-000004
该钢种、规格的实际性能指标见表7：
表7 10.0mm厚度N08904实际性能指标
Figure PCTCN2020096958-appb-000005
可见，采用本发明的轧制方法，能够轧制出符合10.0mm厚度N08904性能指标要求的钢，并且，也具有较高的成功率。

Claims (9)

  1. 一种轧制超级奥氏体不锈钢的方法，其特征在于，包括如下步骤：
    (1)坯料选型：在保证满足轧制厚度需求的情况下，采用最小坯料设计原则，选用加热炉可装入的最小厚度坯料；
    (2)烧钢工序：在1250-1270℃下对坯料进行烧钢，控制上、下表面温度差25-35℃；
    (3)除鳞工序：坯料在经过粗除鳞和精除鳞时均不进行除鳞操作，保持上、下表面温差；
    (4)轧钢工序：控制终轧温度在850℃以上；采用12道次轧制，轧制的最后两个道次的压下量小于0.8mm；轧制时根据不同温度的变形抗力，优化不同厚度下的热膨胀系数，对不同道次下该不锈钢的热膨胀系数进行单独调整；
    (5)矫直工序：采用预矫直机多道次矫直方式，增加矫直压力1000-1500吨，以保证最终板型平直度。
  2. 根据权利要求1所述的轧制超级奥氏体不锈钢的方法，其特征在于，所述步骤(1)中，坯料选型时，加热炉可装入的最小厚度坯料根据加热炉内激光检测仪能够测得的最小坯料厚度确定。
  3. 根据权利要求2所述的轧制超级奥氏体不锈钢的方法，其特征在于，对于大于设计厚度的原始坯料采用开坯处理，使其达到坯料选型的设计厚度。
  4. 根据权利要求1所述的轧制超级奥氏体不锈钢的方法，其特征在于，所述步骤(2)中，烧钢时调整上下梁位置在烧钢过程中保证中位。
  5. 根据权利要求1所述的轧制超级奥氏体不锈钢的方法，其特征在于，所述步骤(3)，在除鳞工序中，保证上表面比下表面的温度高。
  6. 根据权利要求1所述的轧制超级奥氏体不锈钢的方法，其特征在于，所述步骤(4)中，轧机辊缝参数设定不小于3.5mm。
  7. 根据权利要求1所述的轧制超级奥氏体不锈钢的方法，其特征在于，所述步骤(4)中，当温度在873℃以下时，将该不锈钢的热膨胀系数设定为1.0133×10 -2，当温度大于873摄氏度且在880℃以下时，将该不锈钢的热膨胀系数设定为1.0285×10 -2。
  8. 根据权利要求1所述的轧制超级奥氏体不锈钢的方法，其特征在于，所述步骤(5)中，根据板型情况，手动下压辊缝1-1.5mm。
  9. 根据权利要求1-8任一项所述的轧制超级奥氏体不锈钢的方法，其特征在于，所轧制的不锈钢型号规格为厚度8.5mm、宽度2510-2610mm的N08367或厚度10mm、宽度2620-2980mm的N08904。
PCT/CN2020/096958 2019-09-23 2020-06-19 一种轧制超级奥氏体不锈钢的方法 WO2021057117A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020227010554A KR20220061151A (ko) 2019-09-23 2020-06-19 슈퍼 오스테나이트 스테인리스강의 압연 방법
EP20866991.1A EP4035787A4 (en) 2019-09-23 2020-06-19 PROCESS FOR ROLLING SUPERAUSTENITIC STAINLESS STEEL

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910902611.8 2019-09-23
CN201910902611.8A CN110773565B (zh) 2019-09-23 2019-09-23 一种轧制超级奥氏体不锈钢的方法

Publications (1)

Publication Number Publication Date
WO2021057117A1 true WO2021057117A1 (zh) 2021-04-01

Family

ID=69383748

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/096958 WO2021057117A1 (zh) 2019-09-23 2020-06-19 一种轧制超级奥氏体不锈钢的方法

Country Status (4)

Country Link
EP (1) EP4035787A4 (zh)
KR (1) KR20220061151A (zh)
CN (1) CN110773565B (zh)
WO (1) WO2021057117A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113560344A (zh) * 2021-06-29 2021-10-29 鞍钢股份有限公司 一种奥氏体不锈钢的中厚板生产方法
CN115383408A (zh) * 2022-09-09 2022-11-25 甘肃酒钢集团宏兴钢铁股份有限公司 一种高锰无磁钢轧制工艺

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110773565B (zh) * 2019-09-23 2021-08-10 南京钢铁股份有限公司 一种轧制超级奥氏体不锈钢的方法
CN111389914B (zh) * 2020-03-02 2022-03-25 北京鼎新时代科技有限公司 一种超级奥氏体904l不锈钢板带的生产方法
CN111389913A (zh) * 2020-03-17 2020-07-10 江苏甬金金属科技有限公司 一种柔性产品用奥氏体不锈钢箔材的制作方法
CN112658030A (zh) * 2020-12-03 2021-04-16 南京钢铁股份有限公司 一种宽幅薄规格高镍钼奥氏体不锈钢板的轧制方法
CN114042773B (zh) * 2021-10-18 2023-06-23 山西太钢不锈钢股份有限公司 一种提升不锈钢特厚板组织均匀性的方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003041352A (ja) * 2001-05-25 2003-02-13 Sumitomo Metal Ind Ltd ステンレス鋼熱延鋼板およびその製造方法
CN107419194A (zh) * 2017-06-29 2017-12-01 振石集团东方特钢有限公司 一种超级奥氏体不锈钢板卷的加工方法
CN107641698A (zh) * 2016-07-22 2018-01-30 宝钢特钢有限公司 超级奥氏体不锈钢冷轧钢带的制造方法
CN107716584A (zh) * 2017-09-18 2018-02-23 张家港浦项不锈钢有限公司 一种超级奥氏体904l不锈钢板带的生产方法
CN108787751A (zh) * 2018-05-21 2018-11-13 南京钢铁股份有限公司 单机架炉卷轧机宽幅薄规格超级不锈钢板卷生产控制方法
CN108838216A (zh) * 2018-06-29 2018-11-20 首钢京唐钢铁联合有限责任公司 一种板坯翘头的控制方法
CN110066957A (zh) * 2019-05-17 2019-07-30 国家电投集团科学技术研究院有限公司 改进型耐腐蚀超级奥氏体不锈钢及其制备方法
CN110773565A (zh) * 2019-09-23 2020-02-11 南京钢铁股份有限公司 一种轧制超级奥氏体不锈钢的方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006281298A (ja) * 2005-04-04 2006-10-19 Sanyo Special Steel Co Ltd オーステナイト系ステンレス鋼材の分塊圧延方法
CN103286128B (zh) * 2013-05-30 2015-05-20 山西太钢不锈钢股份有限公司 一种超级双相不锈钢s32750中板轧制工艺
CN104275350B (zh) * 2014-08-06 2016-08-24 振石集团东方特钢股份有限公司 一种耐热奥氏体不锈钢的轧制方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003041352A (ja) * 2001-05-25 2003-02-13 Sumitomo Metal Ind Ltd ステンレス鋼熱延鋼板およびその製造方法
CN107641698A (zh) * 2016-07-22 2018-01-30 宝钢特钢有限公司 超级奥氏体不锈钢冷轧钢带的制造方法
CN107419194A (zh) * 2017-06-29 2017-12-01 振石集团东方特钢有限公司 一种超级奥氏体不锈钢板卷的加工方法
CN107716584A (zh) * 2017-09-18 2018-02-23 张家港浦项不锈钢有限公司 一种超级奥氏体904l不锈钢板带的生产方法
CN108787751A (zh) * 2018-05-21 2018-11-13 南京钢铁股份有限公司 单机架炉卷轧机宽幅薄规格超级不锈钢板卷生产控制方法
CN108838216A (zh) * 2018-06-29 2018-11-20 首钢京唐钢铁联合有限责任公司 一种板坯翘头的控制方法
CN110066957A (zh) * 2019-05-17 2019-07-30 国家电投集团科学技术研究院有限公司 改进型耐腐蚀超级奥氏体不锈钢及其制备方法
CN110773565A (zh) * 2019-09-23 2020-02-11 南京钢铁股份有限公司 一种轧制超级奥氏体不锈钢的方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4035787A4 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113560344A (zh) * 2021-06-29 2021-10-29 鞍钢股份有限公司 一种奥氏体不锈钢的中厚板生产方法
CN113560344B (zh) * 2021-06-29 2022-12-16 鞍钢股份有限公司 一种奥氏体不锈钢的中厚板生产方法
CN115383408A (zh) * 2022-09-09 2022-11-25 甘肃酒钢集团宏兴钢铁股份有限公司 一种高锰无磁钢轧制工艺

Also Published As

Publication number Publication date
EP4035787A4 (en) 2022-11-02
KR20220061151A (ko) 2022-05-12
CN110773565A (zh) 2020-02-11
EP4035787A1 (en) 2022-08-03
CN110773565B (zh) 2021-08-10

Similar Documents

Publication Publication Date Title
WO2021057117A1 (zh) 一种轧制超级奥氏体不锈钢的方法
CN105665443B (zh) 一种宽厚板轧机生产极限规格管线钢的轧制工艺
CN112792123B (zh) 一种耐硫酸露点腐蚀热轧圆钢09CrCuSb的生产工艺
CN102451838A (zh) 一种消除钢板热轧过程镰刀弯缺陷的方法
Shinkin Elastoplastic flexure of round steel beams. 1. Springback coefficient
CN102284482B (zh) 一种有效控制中厚板横向边裂的方法
CN111420989A (zh) 生产中厚钢板的方法及系统
CN109530449A (zh) 一种中厚板平面形状控制中的可控点设定方法
CN110180892B (zh) 钛钢复合板生产方法
CN113361179A (zh) 一种中厚板轧机角轧满负荷规程分配方法
Wang et al. VCR back-up roll and negative work roll contour design for solving roll spalling and transfer bar profile problems in hot strip mill
CN107377629A (zh) 一种中厚板轧机精轧阶段规程的分配方法
CN216655854U (zh) 一种用于高强h型钢的不等宽矫直辊组
WO2023138121A1 (zh) 一种薄规格钢板的生产方法
CN107262532A (zh) 一种超宽不锈钢板的加热轧制生产方法
CN112742880B (zh) 一种通过局部温差控制窄规格钢板头尾形状的方法
JP2004283878A (ja) 残留応力のバラツキが少なく形状良好な鋼板を得るための矯正方法
CN108393360A (zh) 一种改善中厚板表面质量的方法
CN114393044B (zh) 一种宽厚板板形瓢曲和板凸度控制方法
CN109290370A (zh) 一种改善厚规格桥梁钢夏比冲击性能的轧制方法
CN114042778B (zh) 一种薄宽规格超高强钢板的热矫直工艺
CN108176716A (zh) 使用连铸圆坯轧制成圆钢的孔型系统及其轧制方法
Gorbunov et al. EFFECT OF ASYMMETRIC ROLLING ON FLATNESS OF SHEET PRODUCTS
CN201702167U (zh) 一种具有高夹持力的热轧机轧辊辊型
JP2006341267A (ja) 自由鍛造方法及び自由鍛造用段付き金敷

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20866991

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 20227010554

Country of ref document: KR

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 2020866991

Country of ref document: EP

Effective date: 20220425