Method for producing galvanized steel sheet
    4.
    发明授权
    Method for producing galvanized steel sheet 失效
    镀锌钢板的生产方法

    公开(公告)号:US5997664A

    公开(公告)日:1999-12-07

    申请号:US870244

    申请日:1997-06-06

    IPC分类号: C21D8/04 C23C2/02 C21D11/00

    摘要: Method for producing a galvannealed steel sheet wherein a slab consisting essentially of C in an amount of 0.004 wt. % or less, N in an amount of 0.004 wt. % or less, Ti in an amount of 0.01 to 0.15 wt %, Si in an amount of 0.05 wt. % or less, Mn in an amount up to 2.5 wt. %, P in an amount up to 0.1 wt. %, S in an amount of 0.015 wt. % or less, sol. Al in an amount of 0.02 to 0.1 wt. % and the balance being Fe, is soaked for at least 30 minutes at a specified temperature (range). The soaked slab is hot rolled to produce a hot-rolled steel sheet which is coiled at a temperature of 500 to 700.degree. C. The coiled hot-rolled steel sheet is cold rolled at a reduction ratio of 60% or more to produce a cold-rolled steel sheet which is annealed at a temperature of from recrystallization temperature to Ac3 transformation temperature. Galvanizing the annealed cold-rolled steel sheet and then galvannealing at a temperature of 450 to 600.degree. C.

    摘要翻译: 合金化热浸镀锌钢板的制造方法,其中基本上由C组成的板坯的含量为0.004重量% %以下,N为0.004重量% %以下,Ti为0.01〜0.15重量%,Si为0.05重量%。 %以下,Mn为2.5重量%以下。 %,P量高达0.1wt。 %,S为0.015wt。 %以下,溶胶。 Al的量为0.02〜0.1wt。 %,余量为Fe,在规定温度(范围)下浸泡至少30分钟。 将该浸渍的板坯进行热轧,制成在500〜700℃的温度下卷取的热轧钢板。卷取的热轧钢板以60%以上的压下率进行冷轧以产生冷 在从再结晶温度至Ac3转变温度的温度下退火的钢卷钢板。 对退火的冷轧钢板进行镀锌,然后在450-600℃的温度下进行合金化。

    Ferritic stainless steel casting and sheet and method for producing the same
    8.
    发明授权
    Ferritic stainless steel casting and sheet and method for producing the same 有权
    铁素体不锈钢铸件及其制造方法

    公开(公告)号:US08628631B2

    公开(公告)日:2014-01-14

    申请号:US13066020

    申请日:2011-04-05

    IPC分类号: C22C38/00

    摘要: The present invention provides a ferritic stainless steel casting and a sheet thereof excellent in deep drawability, punch stretchability and ridging resistance and a method for producing the casting and the sheet. In the present invention, a chemical composition is controlled so that the amounts of C, N, Si, Mn, P and Ti may be reduced to the utmost for securing high workability and, on the basis of the chemical composition, the roping and ridging of a steel sheet product is reduced by adding Mg, thus dispersing Mg containing oxides that accelerate the formation of nuclei for solidification and, resultantly, suppressing the development of coarse columnar crystals in a casting. The present invention is characterized in that the average composition of the Mg containing oxides dispersing in a casting satisfies the following expressions and , 17.4(Al2O3)+3.9(MgO)+0.3(MgAl2O4)+18.7(CaO)≦500   , (Al2O3)+(MgO)+(MgAl2O4)+(CaO)≧95   .

    摘要翻译: 本发明提供一种铁素体不锈钢铸件及其深冲性,冲压伸缩性和抗皱性优异的片材以及铸造和片材的制造方法。 在本发明中,化学成分被控制为使得可以将C,N,Si,Mn,P和Ti的量最大限度地降低以确保高的可加工性,并且基于化学成分,卷绕和起皱 通过添加Mg来还原钢板产品,从而分散加速形成核固化的含Mg氧化物,从而抑制铸造中的粗大柱状晶体的发展。 本发明的特征在于,分散在铸件中的含Mg氧化物的平均组成满足以下表达式2和3,17.4(Al 2 O 3)+3.9(MgO)+0.3(MgAl 2 O 4)+18.7(CaO) (Al 2 O 3)+(MgO)+(MgAl 2 O 4)+(CaO)> = 95 3。

    Hot rolled steel having improved formability
    9.
    发明申请
    Hot rolled steel having improved formability 审中-公开
    成型性提高的热轧钢

    公开(公告)号:US20060108028A1

    公开(公告)日:2006-05-25

    申请号:US11327379

    申请日:2006-01-09

    IPC分类号: C22C38/14

    摘要: A hot rolled steel having improved formability and minimal silver formation is made with a method comprising the addition of titanium and boron to the molten steel to combine with and remove the free nitrogen prior to rolling. Titanium is added so that the amount of nitrogen remaining after Ti addition is less than or equal to about 0.0035 wt % and boron is added to remove the balance of the nitrogen by forming BN.

    摘要翻译: 通过包括向钢水中加入钛和硼以在轧制之前与游离氮结合并除去游离氮的方法制备具有改进的成形性和最小的银形成的热轧钢。 添加钛,使得Ti添加后剩余的氮量小于或等于约0.0035重量%,加入硼以通过形成BN除去余量的氮。

    Cold rolled steel sheet exhibiting excellent press workability and
method of manufacturing the same
    10.
    发明授权
    Cold rolled steel sheet exhibiting excellent press workability and method of manufacturing the same 失效
    表现出优异的压制加工性的冷轧钢板及其制造方法

    公开(公告)号:US5846343A

    公开(公告)日:1998-12-08

    申请号:US616078

    申请日:1996-03-14

    摘要: A cold rolled steel sheet including about 0.001 weight percent or less of carbon (C), about 0.1 weight percent or less of silicon (Si), about 0.3 weight percent or less of manganese (Mn), about 0.05 weight percent or less of phosphorus (P), about 0.003 weight percent or less of sulfur (S), about 0.1 weight percent or less of aluminum (Al), about 0.002 weight percent or less of nitrogen (N), about 0.005 to 0.02 weight percent of titanium (Ti), about 0.001 to 0.01 weight percent of niobium (Nb), and the balance iron and incidental impurities. The total weight percent of carbon, sulfur, and nitrogen is about 0.004 weight percent or less. The content of titanium, carbon, sulfur and nitrogen satisfies the equation: about 4.times.(C wt %).ltoreq.(Ti wt %)-48/14(N wt %)-48/32(S wt %).ltoreq.about 12.times.(C wt %). The method of the invention includes uniformly heating a steel slab having a composition as described above at a temperature T(K) satisfying the following equation: T(K).times.(C wt %+S wt %).ltoreq.about 4.0, and within a temperature range from abut 900.degree. to 1,300.degree. C., hot rolling at a finishing temperature of higher than the A.sub.C3 transformation temperature, coiling at a temperature of about 650.degree. C. or less, cold rolling after pickling at a rolling reduction rate of about 65 to 90 percent, and recrystallization-annealing at a temperature ranging from about 700.degree. to 950.degree. C.

    摘要翻译: 包含碳(C)的约0.001重量%以下,硅(Si)0.1重量%以下,锰(Mn)0.3重量%以下,磷的约0.05重量%以下的冷轧钢板 (P)约0.003重量%或更少的硫(S),约0.1重量%或更少的铝(Al),约0.002重量%或更少的氮(N),约0.005至0.02重量%的钛(Ti ),约0.001〜0.01重量%的铌(Nb),余量为铁和杂质。 碳,硫和氮的总重量百分比为0.004重量%以下。 钛,碳,硫和氮的含量满足以下等式:约4x(C wt%)(Ti wt%)-48/14(N wt%)-48/32(S wt%) 约12x(C wt%)。 本发明的方法包括在满足以下等式的温度T(K)下均匀加热具有上述组成的钢坯:T(K)x(C wt%+ S wt%)≤4.0,以及 在约900〜1300℃的温度范围内,在高于AC3相变温度的终轧温度下进行热轧,在约650℃以下的温度下卷取,以轧制压下率酸洗后的冷轧 约65〜90%,在约700〜950℃的温度下进行再结晶退火。