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    Method for Manufaturing Thin Strip Continuously Cast 700MPa-Grade High Strength Weather-Resistant Steel
    2.
    发明申请
    Method for Manufaturing Thin Strip Continuously Cast 700MPa-Grade High Strength Weather-Resistant Steel 有权
    制造薄膜连续铸造700MPa级高强度耐候钢的方法

    公开(公告)号：US20140366602A1

    公开(公告)日：2014-12-18

    申请号：US14372678

    申请日：2013-02-18

    Applicant: Baoshan Iron & Steel Co., Ltd.

    Inventor： Yuan Fang ,  Xiufang Wang ,  Yan Yu ,  Jianchun Wu ,  Feng Zhang ,  Wei He

    IPC: B21B1/26

    CPC classification number: B21B1/26 ,  B21B2001/225 ,  B22D11/0622 ,  C21D8/00 ,  C21D8/005 ,  C21D8/0426 ,  C21D9/52 ,  C21D2211/002 ,  C21D2211/005 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16

    Abstract: A method for manufacturing thin strip continuously cast 700 Mpa grade high strength weather-resistant steel, the method comprising the following steps: 1) casting a 1-5 mm thick cast strip in a double roller continuous casting machine, the cast strip comprising the following chemical compositions by weight percent: C 0.03-0.1%, Si≦0.4%, Mn 0.75-2.0%, P 0.07-0.22%, S≦0.01%, N≦0.012%, and Cu 0.25-0.8%, further comprising more than one of Nb, V, Ti and Mo: Nb 0.01-0.1%, V 0.01-0.1%, Ti 0.01-0.1%, and Mo 0.1-0.5%, and the balance being Fe and unavoidable impurities; 2) cooling the cast strip at a rate greater than 20° C./s; 3) hot rolling the cast strip under a temperature of 1050-1250° C. at a reduction rate of 20-50% and a deformation rate greater than 20 s-1; then conducting austenite online recrystallization, the thickness of the hot rolled strip being 0.5-3.0 mm; 4) cooling at a rate of 10-80° C./s; and 5) rolling up under a temperature of 500-650° C. The obtained steel strip microstructure mainly consists of uniformly distributed bainites and needle-shaped ferrites.

    Abstract translation: 一种连续浇铸700Mpa级高强度耐候钢的薄带钢的制造方法，该方法包括以下步骤：1）在双辊连续铸造机中铸造1-5mm厚的铸钢带，铸造带包括以下 化学组成重量百分比：C 0.03-0.1％，Si＆NlE; 0.4％，Mn 0.75-2.0％，P 0.07-0.22％，S＆NlE; 0.01％，N＆lt; lE; 0.012％和Cu 0.25-0.8％ Nb，V，Ti和Mo：Nb中0.01-0.1％，V 0.01-0.1％，Ti 0.01-0.1％，Mo 0.1-0.5％，余量为Fe和不可避免的杂质; 2）以大于20℃/ s的速率冷却铸钢带; 3）在1050-1250℃的温度下以20-50％的压缩率和大于20s-1的变形率对铸造带进行热轧; 然后进行奥氏体在线再结晶，热轧带材的厚度为0.5-3.0mm; 4）以10-80℃/ s的速率冷却; 和5）在500-650℃的温度下卷起。得到的钢带组织主要由均匀分布的贝氏体和针状铁氧体组成。

    Method for producing ultra-thin hot-rolled strip steel
    3.
    发明授权
    Method for producing ultra-thin hot-rolled strip steel 有权

    公开(公告)号：US12139773B2

    公开(公告)日：2024-11-12

    申请号：US17273016

    申请日：2019-09-12

    Applicant: BAOSHAN IRON & STEEL CO., LTD.

    Inventor： Yuan Fang ,  Jianchun Wu ,  Jian Zhang

    IPC: C21D9/52 ,  B21B1/22 ,  B22D11/06 ,  B22D11/116 ,  B22D11/124 ,  C21D1/667 ,  C21D8/02

    Abstract: A method for producing ultra-thin hot-rolled strip steel, the method comprising the following process steps: A. a smelting process: feeding scrap steel into an induction electric furnace (1) for smelting so that the scrap steel melts into molten steel; B. a refining process: using a ladle refining furnace (2) and a ladle vacuum degassing furnace (3) to refine the molten steel; C. a continuous casting process: casting the refined molten steel into a cast strip blank that has a thickness of 1.6-2.5 mm by means of a dual-roller thin strip continuous casting system (4); D. a hot rolling process: directly feeding the cast strip blank that was cast in the continuous casting process to a single-stand hot rolling mill (9) for rolling to produce hot-rolled strip steel, the thickness of the hot-rolled strip steel being 0.8-1.5 mm; E. a cooling coiling process: performing atomizing cooling on the hot-rolled strip steel, and coiling after the strip steel temperature is controlled to be 400-750° C. The present method achieves an extremely compact, environmentally-friendly and economical ultra-thin hot-rolled strip steel production process flow, and achieves the environmentally-friendly and economical continuous production of metal plates and strips.

    Method and Device for Cleaning a Surface of a Twin-Roller Continuous Thin Strip Casting Roller
    4.
    发明申请
    Method and Device for Cleaning a Surface of a Twin-Roller Continuous Thin Strip Casting Roller 有权
    双辊连续薄带铸造辊表面清洁方法和装置

    公开(公告)号：US20150231693A1

    公开(公告)日：2015-08-20

    申请号：US14429735

    申请日：2012-09-27

    Applicant: BAOSHAN IRON & STEEL, CO. LTD

    Inventor： Jian Zhang ,  Yuan Fang ,  Changhong Ye ,  Chengquan Wang ,  Junbao Zhang

    IPC: B22D11/06 ,  B22D43/00 ,  B22D11/16

    CPC classification number: B22D11/0665 ,  B22D11/0622 ,  B22D11/16 ,  B22D43/00

    Abstract: A method for cleaning a surface of a twin-roller thin-belt continuous casting roller, wherein each casting roller of the twin-roller thin-belt continuous casting machine comprises two brush rollers in an upper and lower arrangement for cleaning the surface thereof, wherein a rotational direction of at least one brush roller is as same as a casting roller, and the linear speed of the casting roller is constant and greater than its rotational speed; and a roller surface cleaning device controls the distance or the pressure between the brush rollers and the casting roller by a position control device fixed on a casting roller bearing seat, and it controls the flattening amount in 1-10 times of the average pit depth on the casting roller face after being brushed, so as to ensure cleaning efficiency. In a process of twin-roller thin-belt continuous casting, the present invention can improve the cleaning efficiency of the thin-belt continuous casting roller, and make the coefficient of thermal conductivity of the roller surface more uniform and increase the quality of belt.

    Abstract translation: 一种用于清洁双辊薄带连续铸造辊的表面的方法，其中双辊薄带连续铸造机的每个浇铸辊包括用于清洁其表面的上下布置的两个刷辊，其中 至少一个刷辊的旋转方向与铸辊相同，并且铸辊的线速度恒定并大于其转速; 辊表面清洁装置通过固定在铸辊轴承座上的位置控制装置来控制刷辊和铸辊之间的距离或压力，并且控制平均凹坑深度的1-10倍的平整量 刷辊后的辊面，以保证清洗效率。 在双辊薄带连续铸造的过程中，本发明可以提高薄带连续铸造辊的清洁效率，并且使辊表面的导热系数更均匀并提高带的质量。

    Method for directly producing pickling-free hot-plated sheet strip product from molten steel
    5.
    发明授权
    Method for directly producing pickling-free hot-plated sheet strip product from molten steel 有权

    公开(公告)号：US10683561B2

    公开(公告)日：2020-06-16

    申请号：US15314934

    申请日：2014-12-23

    Applicant: BAOSHAN IRON & STEEL CO.,LTD.

    Inventor： Jun Li ,  Ning Tan ,  Chuang Guan ,  Yuan Fang ,  Xinjian Ma

    IPC: C21D9/56 ,  B22D11/11 ,  C21D1/26 ,  C23C2/40 ,  C21D8/02 ,  C23C2/06 ,  C23C2/12 ,  B22D11/06 ,  C21D1/76 ,  C21D9/52

    Abstract: Method for directly producing a pickling-free hot-plated sheet strip product from molten steel comprising: obtaining a refined molten steel; thin strip continuous casting: a mixed gas of an inert gas and a reducing gas is used for protection in the billet casting process; hot rolling: the cast strip is levelled at a high temperature so as to improve the sheet shape and rolled to a suitable thickness so as to change the product specification, or provide a mechanical disruption action on the iron oxide skin on the surface of the cast strip; reduction annealing: a sectional reduction method is used to perform sectional reductions with the temperature held within two ranges, i.e., 450-600° C. and 700-1000° C., wherein the reduction is performed within a range of 450-600° C. for 1-5 minutes and within a range of 700-1000° C. for 1-3 minutes to remove the iron oxide skin produced in the previous procedure, the concentration of the reducing gas being not lower than 5%; and hot galvanization: after having been cooled in a protective atmosphere, the strip billet is brought into a zinc bath and hot-plated with zinc and other alloy, and then cooled and coiled. The present invention realizes a highly continuous production of a hot-plated product from molten steel with iron and steel, and hot plating with zinc or an alloy is directly performed without removing elementary iron produced by the reduction, so that the energy consumption in the middle stage can be saved and the recovery of metal reaches close to 100%.

    Method and Device for Continuous Thin Strip Casting
    8.
    发明申请
    Method and Device for Continuous Thin Strip Casting 有权
    连续薄带铸造的方法和装置

    公开(公告)号：US20150251244A1

    公开(公告)日：2015-09-10

    申请号：US14429743

    申请日：2012-09-27

    Applicant: BAOSHAN IRON & STEEL CO., LTD

    Inventor： Sanbing Ren ,  Yuan Fang ,  Junfei Fan ,  Yan Yu

    IPC: B22D11/10 ,  B22D41/01 ,  B22D41/60 ,  B22D11/00

    CPC classification number: B22D11/10 ,  B22D11/001 ,  B22D11/0622 ,  B22D11/118 ,  B22D41/01 ,  B22D41/015 ,  B22D41/60

    Abstract: A method for continuous thin strip casting comprises: introducing molten steel through a long nozzle (11) into a tundish (1) from a ladle (10), and heating the molten steel in a manner of externally heating the tundish, so as to maintain the molten steel at a basically constant temperature in an entire pouring process. The tundish is one strand tundish, and the molten steel flows below a weir (2) which is located at one side in the tundish, then passes a first dam (3) and enters a channel (4) with an induction heating device, and a temperature of the molten steel after induction heating is 30˜50 C higher than that of the molten steel introduced into the tundish, and the heated molten steel then flows out from a outlet at the other side of the tundish to a nozzle (5) for casting. The present invention has also provided a device for continuous thin strip casting, which can realize constant-temperature pouring of continuous thin strip casting, which may overcome quality difference of rolls before and after, stabilize both the pulling speed of the strip and the condition of the molten pool, and thus avoid quality defects caused by speed changes. It can also fully facilitate the inclusions in the molten steel to float upwardly, so as to improve quality of the cast strip; reduce the superheat degree of the ladle molten steel to lower the consumption of energy, improve the quality of the molten steel and decrease the wastage of refractory material; and lessen the formation of the cold steel on the surface of the molten pool at the preliminary stage of pouring, so as to facilitate it entering into the normal pouring stage immediately.

    Abstract translation: 一种用于连续薄带铸造的方法包括：将钢水通过长喷嘴（11）从钢包（10）引入中间包（1）中，并以外部加热中间包的方式加热钢水，以保持 在整个浇注过程中基本恒定温度的钢水。 中间包是一个中间包，钢水在位于中间包一侧的堰（2）下方流动，然后通过一个第一坝（3），并用感应加热装置进入一个通道（4）， 感应加热后的钢水的温度比引入中间包的钢水的温度高30〜50℃，然后将加热的钢水从中间包的另一侧的出口流出到喷嘴（5）， 铸造。 本发明还提供了一种连续薄带铸造装置，其可以实现连续薄带铸造的恒温浇注，其可以克服前后辊的质量差异，稳定带材的拉伸速度和条件的条件 熔池，从而避免由速度变化引起的质量缺陷。 也可以完全促进钢水中的夹杂物向上浮起，从而提高铸钢带的质量; 降低钢包钢水的过热度，降低能源消耗，提高钢水质量，降低耐火材料的浪费; 并且在浇注的初始阶段减少在熔池表面上的冷钢的形成，以便于其立即进入正常浇注阶段。

    Manufacturing Method for Strip Casting 700 MPa-Grade High Strength Atmospheric Corrosion-Resistant Steel
    9.
    发明申请
    Manufacturing Method for Strip Casting 700 MPa-Grade High Strength Atmospheric Corrosion-Resistant Steel 有权
    700MPa级高强度大气耐腐蚀钢带的铸造制造方法

    公开(公告)号：US20140373981A1

    公开(公告)日：2014-12-25

    申请号：US14372699

    申请日：2013-02-18

    Applicant: Baoshan Iron & Steel Co., Ltd.

    Inventor： Xiufang Wang ,  Yuan Fang ,  Yan Yu ,  Jianchun Wu ,  Bo Qin

    IPC: C21D8/02 ,  C21D9/52 ,  B22D11/06

    CPC classification number: C21D8/0215 ,  B22D11/001 ,  B22D11/0622 ,  B22D11/116 ,  B22D11/12 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/52 ,  C21D2211/002 ,  C21D2211/005 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58

    Abstract: A manufacturing method for strip casting 700 MPa-grade high strength atmospheric corrosion-resistant steel, comprising the following steps: 1) smelting, where the chemical composition of a molten steel in terms of weight percentage is that C is between 0.03-0.1%, Si≦0.4%, Mn is between 0.75-2.0%, P is between 0.07-0.22%, S≦0.01%, N≦0.012%, Cu is between 0.25-0.8%, Cr is between 0.3-0.8%, and Ni is between 0.12-0.4%, additionally, also comprised is at least one micro-alloying element among Nb, V, Ti, and Mo, where Nb is between 0.01-0.1%, V is between 0.01-0.1%, Ti is between 0.01-0.1%, and Mo is between 0.1-0.5%, and where the remainder is Fe and unavoidable impurities; 2) strip casting, where a 1-5 mm-thick cast strip is casted directly; 3) cooling the cast strip, where the cooling rate is greater than 20° C./s; 4) online hot rolling the cast strip, where the hot rolling temperature is between 1050-1250° C., where the reduction rate is between 20-50%, and where the deformation rate is >20s−1; austenite online recrystallizing after hot rolling, where the thickness of the hot rolled strip is between 0.5-3.0 mm; and, 5) cooling and winding, where the cooling rate is between 10-80° C./s, and where the winding temperature is between 520-670° C. The microscopic structure of a steel strip acquired is primarily constituted by evenly distributed bainite and acicular ferrite.

    Abstract translation: 700MPa级高强度大气耐腐蚀钢的带钢铸造的制造方法，包括以下步骤：1）熔融，其中钢水的重量百分比的化学组成为C在0.03〜0.1％之间， Si％，0.4％，Mn在0.75〜2.0％之间，P在0.07〜0.22％之间，S＆NlE; 0.01％，N＆amp; NlE; 0.012％，Cu在0.25-0.8％之间，Cr在0.3-0.8％之间，Ni是 在0.12-0.4％之间，另外还包含Nb，V，Ti和Mo中的至少一种微合金元素，其中Nb在0.01-0.1％之间，V在0.01-0.1％之间，Ti在0.01-0.1％之间， 0.1％，Mo在0.1-0.5％之间，余量为Fe和不可避免的杂质; 2）带钢铸造，其中直接铸造1-5mm厚的铸钢带; 3）冷却铸钢带，其中冷却速率大于20℃/ s; 4）在线热轧铸钢带，其中热轧温度在1050-1250℃之间，其中压下率在20-50％之间，变形率> 20s-1; 热轧后的奥氏体在线再结晶，其中热轧带材的厚度在0.5-3.0mm之间; 和5）冷却和卷绕，其中冷却速率在10-80℃/ s之间，并且其中卷绕温度在520-670℃之间。获得的钢带的微观结构主要由均匀分布的 贝氏体和针状铁素体。

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