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    • 1. 发明授权
    • Continuously cast slab of extremely low carbon steel with less surface
defects in steel sheet-producing step; extremely low carbon sheet
steel; and process for producing the same
    • 在钢板生产步骤中连续铸造具有较少表面缺陷的极低碳钢板; 极低碳钢板 及其制造方法
    • US5578143A
    • 1996-11-26
    • US500883
    • 1995-07-21
    • Kazuo KoyamaEiichi TakeuchiMasayoshi Suehiro
    • Kazuo KoyamaEiichi TakeuchiMasayoshi Suehiro
    • B22D11/00B22D11/115B32B15/01C22C38/14C23C2/06B22D27/02B32B15/18C21D1/04
    • C22C38/14B22D11/00B22D11/115B32B15/011C23C2/06Y10S148/903Y10T428/12958
    • (Object) IF-based, continuously cast slab essentially freed from defects such as surface defects, difficult production and poor strength, etc. of the product that the IF-based sheet steels have; sheet steels and a process for producing the same are provided.(Structure) A continuously cast slab of extremely low carbon steel comprising not more than 1.5% by mass of Si, not more than 2.0% by mass of Mn, not ore than 0.15% by mass of P, 0.01-0.15% by mass of Al, and not more than 0.0050% by mass of N, where the surface layer further contains 0.01-0.08% by mass of C existing as a cementite and the inner layer further contains not more than 0.0050% by mass of C, and at least one of 0.02-0.10% by mass of Ti, 0.01-0.10% by mass of Nb, 0.02-0.10% by mass of V and 0.03-0.10% by mass of Zr, the carbon existing substantially as carbides of these elements, preferably both the surface layer and the inner layer further contain 0.0001-0.0015% by mass of B, the balance being Fe and inevitable impurities; an sheet steel made from the slab; and a process for producing the slab and the sheet steel, combined with continuously casting powder, an electromagnetic brake and an alloy-adding wire.(Effect) The IF steel and its high strong steel, which have been suffered from impaired mass production, lower production yield and incomplete product characteristics have been established as satisfactory basis metallic materials.
    • PCT No.PCT / JP94 / 01964 371日期1995年7月21日 102(e)1995年7月21日PCT PCT 1994年11月21日PCT公布。 出版物WO95 / 14794 日期1995年6月1日(对象)基于IF的连续铸坯基本上免除了IF型钢板所产生的产品的缺陷,如表面缺陷,生产难度和强度差等; 提供了钢板及其制造方法。 (结构)将超过1.5质量%的Si,不超过2.0质量%的Mn,不超过0.15质量%的P的0.01-0.15质量%的极低碳钢的连铸板, Al,0.0050质量%以下,其中,表层进一步含有0.01-0.08质量%的作为渗碳体的C,内层还含有不大于0.0050质量%的C,至少 Ti:0.02〜0.10质量%,Nb:0.01〜0.10质量%,V:0.02〜0.10质量%,Zr:0.03〜10质量%,碳,碳, 表面层和内层还含有0.0001-0.0015质量%的B,余量为Fe和不可避免的杂质; 由板坯制成的钢板; 以及连续铸造粉末,电磁制动器和合金添加线的板坯和钢板的制造方法。 (效果)已经建立了以金属材料为基础的IF钢及其高强度钢,其受到批量生产受损,生产率降低和产品特性不完善。
    • 3. 发明授权
    • High-strength hot-dip galvanized steel sheet and method for producing the same
    • 高强度热浸镀锌钢板及其制造方法
    • US07736449B2
    • 2010-06-15
    • US11977537
    • 2007-10-24
    • Yoshihisa TakadaMasayoshi SuehiroMasao KurosakiHidekuni MurakamiHiroyasu FujiiHaruhiko EguchiHisaaki Sato
    • Yoshihisa TakadaMasayoshi SuehiroMasao KurosakiHidekuni MurakamiHiroyasu FujiiHaruhiko EguchiHisaaki Sato
    • C23C2/28
    • C22C38/02C21D1/185C21D1/74C21D8/0273C21D8/0278C21D9/46C22C38/008C22C38/04C22C38/06C22C38/08C22C38/12C22C38/16C23C2/02C23C2/40Y10T29/301Y10T428/12799Y10T428/12951
    • The present invention stably provides a high-strength hot-dip galvanized steel sheet having a high tensile strength and no non-plated portions and being excellent in workability and surface properties even when the employed equipment has only a reduction annealing furnace and a steel sheet containing relatively large amounts of Si, Mn and Al that are regarded as likely to cause non-plated portions is used as the substrate. The present invention: secures good plating performance even when the steel sheet contains Si, Mn and Al by adding Ni to a steel sheet, thus forming oxides at some portions in the steel sheet surface layer, and resultantly suppressing the surface incrassation of Si, Mn and Al at the portions where oxides are not formed; enhances the effect of Ni and accelerates the formation of oxides by further adding Mo, Cu and Sn; and moreover, in the case of a TRIP steel sheet, secures austenite by determining the ranges of Si and Al strictly, avoiding the deterioration of plating performance caused by the addition of Ni, and further adding Mo in a balanced manner.In addition, the present invention, in a TRIP steel sheet, improves press formability by regulating a retained austenite ratio and accelerates the formation of oxides by regulating a hydrogen concentration and a dew point in annealing before plating.
    • 本发明稳定地提供了具有高拉伸强度和无镀层部分的高强度热浸镀锌钢板,并且即使所用设备仅具有还原退火炉和含有 被认为可能引起非电镀部分的相对大量的Si,Mn和Al被用作衬底。 本发明:即使在钢板中含有Si,Mn和Al的钢板中也添加了Ni,从而在钢板表面层的某些部分形成氧化物,也可以确保良好的镀层性,从而抑制Si,Mn 和Al在不形成氧化物的部分; 通过进一步添加Mo,Cu和Sn,增强Ni的作用并加速氧化物的形成; 此外,在TRIP钢板的情况下,通过严格地确定Si和Al的范围来确保奥氏体,避免由于添加Ni而引起的电镀性能的劣化,并且进一步以平衡的方式添加Mo。 此外,本发明在TRIP钢板中,通过调节残留奥氏体比例,通过调节镀层前退火时的氢浓度和露点来促进氧化物的形成,提高冲压成形性。
    • 8. 发明授权
    • High-strength hop-dip galvanized steel sheet
    • 高强度浸镀锌钢板
    • US07294412B2
    • 2007-11-13
    • US10542393
    • 2004-01-15
    • Yoshihisa TakadaMasayoshi SuehiroMasao KurosakiHidekuni MurakamiHiroyasu FujiiHaruhiko EguchiHisaaki Sato
    • Yoshihisa TakadaMasayoshi SuehiroMasao KurosakiHidekuni MurakamiHiroyasu FujiiHaruhiko EguchiHisaaki Sato
    • B32B15/01B32B15/04B32B15/18
    • C22C38/02C21D1/185C21D1/74C21D8/0273C21D8/0278C21D9/46C22C38/008C22C38/04C22C38/06C22C38/08C22C38/12C22C38/16C23C2/02C23C2/40Y10T29/301Y10T428/12799Y10T428/12951
    • The present invention stably provides a high-strength hot-dip galvanized steel sheet having a high tensile strength and no non-plated portions and being excellent in workability and surface properties even when the employed equipment has only a reduction annealing furnace and a steel sheet containing relatively large amounts of Si, Mn and Al that are regarded as likely to cause non-plated portions is used as the substrate. The present invention: secures good plating performance even when the steel sheet contains Si, Mn and Al by adding Ni to a steel sheet, thus forming oxides at some portions in the steel sheet surface layer, and resultantly suppressing the surface incrassation of Si, Mn and Al at the portions where oxides are not formed; enhances the effect of Ni and accelerates the formation of oxides by further adding Mo, Cu and Sn; and moreover, in the case of a TRIP steel sheet, secures austenite by determining the ranges of Si and Al strictly, avoiding the deterioration of plating performance caused by the addition of Ni, and further adding Mo in a balanced manner.In addition, the present invention, in a TRIP steel sheet, improves press formability by regulating a retained austenite ratio and accelerates the formation of oxides by regulating a hydrogen concentration and a dew point in annealing before plating.
    • 本发明稳定地提供了具有高拉伸强度和无镀层部分的高强度热浸镀锌钢板,并且即使所用设备仅具有还原退火炉和含有 被认为可能引起非电镀部分的相对大量的Si,Mn和Al被用作衬底。 本发明:即使在钢板中含有Si,Mn和Al的钢板中也添加了Ni,从而在钢板表面层的某些部分形成氧化物,也可以确保良好的镀层性,从而抑制Si,Mn 和Al在不形成氧化物的部分; 通过进一步添加Mo,Cu和Sn,增强Ni的作用并加速氧化物的形成; 此外,在TRIP钢板的情况下,通过严格地确定Si和Al的范围来确保奥氏体,避免由于添加Ni而引起的电镀性能的劣化,并且进一步以平衡的方式添加Mo。 此外,本发明在TRIP钢板中,通过调节残留奥氏体比例,通过调节镀层前退火时的氢浓度和露点来促进氧化物的形成,提高冲压成形性。