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Manufacturing method for strip casting 700 MPa-grade high strength atmospheric corrosion-resistant steel

机译：条形铸造700MPa级高强度耐大气腐蚀钢的制造方法

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摘要

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.

机译：一种带钢铸造的700 MPa级高强度耐大气腐蚀钢的制造方法，包括以下步骤：1）冶炼，其中钢水的化学成分以重量百分比计为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≤0.01％，N≤0.012％，Cu在0.25-0.8％之间，Cr在0.3-0.8％之间，并且Ni是另外，在Nb，V，Ti和Mo中还包含至少一种介于0.12-0.4％之间的微合金元素，其中Nb介于0.01-0.1％之间，V介于0.01-0.1％之间，Ti介于0.01-0.1％之间。 Mo：0.1％，Mo在0.1-0.5％之间，其余为Fe和不可避免的杂质; 2）带钢铸造，直接铸造1-5 mm厚的带钢; 3）冷却铸带，冷却速率大于20℃/ s; 4）在线对铸带进行热轧，其中热轧温度在1050-1250℃之间，压下率在20-50％之间，变形率> 20s ^{-1 ;热轧后奥氏体在线重结晶，其中热轧带钢的厚度在0.5-3.0mm之间; 5）冷却和卷绕，其中冷却速率在10-80℃/ s之间，并且卷绕温度在520-670℃之间。所获得的钢带的显微组织主要由均匀分布构成贝氏体和针状铁素体。}

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公开/公告号US9790566B2

专利类型
公开/公告日2017-10-17

原文格式PDF
申请/专利权人 BAOSHAN IRON & STEEL CO. LTD.;
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申请/专利号US201314372699
发明设计人 YAN YU;YUAN FANG;BO QIN;JIANCHUN WU;XIUFANG WANG;
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申请日2013-02-18
分类号C21D8/02;C22C38/00;C22C38/02;C22C38/04;C22C38/42;C22C38/44;C22C38/46;C22C38/48;C22C38/50;C22C38/58;B22D11/06;C21D9/52;B22D11/00;B22D11/116;B22D11/12;
国家 US
入库时间 2022-08-21 13:47:35

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