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    • 8. 发明授权
    • Method for producing hot-dip galvanized steel sheet having high strength and also being excellent in formability and galvanizing property
    • 具有高强度并且成型性和镀锌性优异的热浸镀锌钢板的制造方法
    • US06537394B1
    • 2003-03-25
    • US09868674
    • 2001-06-21
    • Kazunori OsawaKei SakataOsamu FurukimiYoshitsugu SuzukiAkio Shinohara
    • Kazunori OsawaKei SakataOsamu FurukimiYoshitsugu SuzukiAkio Shinohara
    • C12D800
    • C23C2/02C21D8/0226C21D8/0273C21D8/0278C21D8/0478C21D2211/005C22C38/04C22C38/08C22C38/12C22C38/14C22C38/16C23C2/28
    • A hot-dip galvanized high-strength steel sheet having superior workability and galvanizability containing: 0.01% to 0.20% by weight of C; 1.0% by weight or less of Si; more than 1.5% to 3.0% by weight of Mn; 0.10% by weight or less of P; 0.05% by weight or less of S; 0.10% by weight or less of Al; 0.010% by weight or less of N; 0.010% to 1.0% by weight in total of at least one element selected from the group consisting of Ti, Nb, and V; and the balance being Fe and incidental impurities; in which the steel sheet has the metal structure in which the areal rate of the ferrite phase is 50% or more, the ferrite phase has an average grain diameter of 10 &mgr;m or less, and the thickness of a band-like structure composed of the second phase satisfies the relationship Tb/T≦0.005, where Tb is the average thickness in the sheet thickness direction of the band-like structure and T is the thickness of the steel sheet, and a method for producing the same. To provide a method for producing a hot-dip galvanized high-strength steel sheet in which superior workability and high strength are obtained and moreover satisfactory galvanizability is obtained when galvanizing is performed using facilities such as a continuous galvanizing line.
    • 一种具有优异的加工性和镀层性的热浸镀锌高强度钢板,其含有:0.01〜0.20重量%的C,1.0重量%以下的Si,1.5重量%〜3.0重量%的Mn,0.10重量% 以下的P:0.05重量%以下,S:0.10重量%以下,Al:0.010重量%以下,N:0.010重量%以下,0.010〜1.0重量% 由Ti,Nb和V组成的组; 余量为Fe和杂质;其中钢板具有铁素体相的面积率为50%以上的金属结构,铁素体相的平均粒径为10μm以下,厚度为 由第二相组成的带状结构满足Tb / T <0.005的关系,其中Tb是带状结构的板厚方向上的平均厚度,T是钢板的厚度, 为了生产相同。 为了提供一种能够获得优异的加工性和高强度的热镀锌高强度钢板的制造方法,并且当使用诸如连续镀锌线的设备进行镀锌时,获得了令人满意的镀锌性。
    • 9. 发明授权
    • Coated seizure-hardening type cold-rolled steel sheet having excellent aging resistance and method of production thereof
    • 耐老化性优异的涂布硬化型冷轧钢板及其制造方法
    • US06171412B2
    • 2001-01-09
    • US09194533
    • 1998-11-25
    • Saiji MatsuokaMasahiko MoritaOsamu FurukimiTakashi ObaraTetsuya KiyasuYoshio Yamazaki
    • Saiji MatsuokaMasahiko MoritaOsamu FurukimiTakashi ObaraTetsuya KiyasuYoshio Yamazaki
    • C21D800
    • C22C38/14C21D8/02C21D8/0426C21D8/0431C21D8/0436C21D8/0473C22C38/12
    • Disclosed are bake-hardenable sheet steel with good anti-aging property and a method for producing it. While controlling its C, P, S and N contents, the chemical composition of the sheet steel is defined to comprise not larger than 1.0% of Si, not larger than 3.0% of Mn, from 0.01 to 0.20% of Al and from 0.001 to 0.2% of Ti, in terms of % by weight. The value A (=(AIQUENCH−AI)/AIQUENCH) of the sheet steel is defined to be not smaller than 0.4 and the value AIQUENCH thereof to be not smaller than 30; or the ratio of the mean misorientation, M (degree), to the mean grain size, G (&mgr;m), M/G, of the sheet steel is defined to be not smaller than 0.8. The steel may additionally contain from 0.001 to 0.2% of Nb and/or from 0.0001 to 0.0080% of B. While controlling its Si, Mn, S, Al and N contents, the chemical composition of a steel slab is defined to comprise from 0.005 to 0.02% of C, not larger than 0.05% of P and from 0.025 to 0.19% of Nb, with satisfying the condition of 0.7×(C/12)≦Nb/93≦1.2×(C/12) (where C indicates the C content (wt. %), and Nb indicates the Nb content (wt. %)). To produce bake-hardenable sheet steel from it, the slab is heated, hot-rolled at a finishing delivery temperature of from 960 to 650° C., coiled at a temperature of from 750 to 400° C., then cold-rolled to a reduction of from 50 to 95%, and thereafter annealed for recrystallization at a temperature of from 750 to 920° C. The slab may additionally contain B and/or Ti. The invention stably produces bake-hardenable sheet steel on an industrial scale.
    • 公开了具有良好抗老化性能的可烘烤硬化性钢板及其制造方法。 在控制其C,P,S和N含量的同时,将钢板的化学成分定义为不大于1.0%的Si,不大于Mn的3.0%,Al的0.01至0.20%和0.001至 0.2%Ti,以重量%计。 将钢板的值A(=(AIQUENCH-AI)/ AIQUENCH)定义为不小于0.4且其AIQUENCH值不小于30; 或平均取向度M(度)与平均晶粒尺寸G(mum),M / G的比值定义为不小于0.8。 钢可以另外含有0.001-0.2%的Nb和/或0.0001-0.0080%的B。在控制其Si,Mn,S,Al和N含量的同时,钢坯的化学组成定义为包含0.005 至0.02%的C,不大于0.05的P和0.025至0.19%的Nb,满足0.7x(C / 12)<= Nb / 93 <= 1.2×(C / 12)的条件(其中 C表示C含量(重量%),Nb表示Nb含量(重量%))。 为了从其制造可烘烤硬化的钢板,在960〜650℃的最终输送温度下对板坯进行加热,热轧,在750〜400℃的温度下卷取,然后冷轧至 减少50至95%,然后在750至920℃的温度下退火再结晶。板可以另外含有B和/或Ti。 本发明在工业规模上稳定地生产可烘烤硬化钢板。
    • 10. 发明授权
    • Austenitic-ferritic stainless steel
    • 奥氏体 - 铁素体不锈钢
    • US08562758B2
    • 2013-10-22
    • US10587222
    • 2005-01-27
    • Mitsuyuki FujisawaYoshihiro YazawaYasushi KatoOsamu Furukimi
    • Mitsuyuki FujisawaYoshihiro YazawaYasushi KatoOsamu Furukimi
    • C22C38/38
    • C22C38/42C22C38/001C22C38/02C22C38/58
    • A low Ni and high N austenitic-ferritic stainless steel is disclosed. It includes an austenitic-ferritic stainless steel having high formability and punch stretchability, crevice corrosion resistance, corrosion resistance at welded part, or excellent intergranular corrosion resistance, from a stainless steel structured by mainly austenite phase and ferrite phase, and consisting essentially of 0.2% or less C, 4% or less Si, 12% or less Mn, 0.1% or less P, 0.03% or less S, 15 to 35% Cr, 3% or less Ni, and 0.05 to 0.6% N, by mass, by adjusting the percentage of the austenite phase in a range from 10 to 85%, by volume. Furthermore, it includes an austenitic-ferritic stainless steel having higher formability by adjusting the amount of (C+N) in the austenite phase to a range from 0.16 to 2% by mass.
    • 公开了一种低Ni和高N奥氏体 - 铁素体不锈钢。 它包括由主要由奥氏体相和铁素体相构成的不锈钢,具有高成形性和冲孔拉伸性,耐缝隙腐蚀性,焊接部位的耐腐蚀性或优异的晶间耐腐蚀性的奥氏体 - 铁素体不锈钢,并且基本上由0.2% 或更少的C,4%以下的Si,12%以下的Mn,0.1%以下的P,0.03%以下的S,15〜35%的Cr,3%以下的Ni和0.05〜0.6%的N, 通过将奥氏体相的百分比调整为10〜85体积%的范围。 此外,通过将奥氏体相中的(C + N)的量调节至0.16〜2质量%的范围,可以提高成形性的奥氏体 - 铁素体系不锈钢。