High-strength low-alloy steels
    1.
    再颁专利
    High-strength low-alloy steels 失效
    高强度低合金钢

    公开(公告)号:USRE28878E

    公开(公告)日:1976-06-22

    申请号:US522527

    申请日:1974-11-11

    IPC分类号: C22C38/00

    CPC分类号: C22C38/001

    摘要: Fully killed high-strength low-alloy steels consisting essentially of .12% to .20% carbon, 1.10% to 1.65% manganese, .05% to .20% vanadium, .005% to .025% nitrogen, .04% maximum phosphorus, .025% maximum sulfur, .60% maximum silicon and balance iron are characterized in a hot-rolled finished condition by yield strengths in excess of 80,000 p.s.i., ultimate tensile strengths in excess of 95,000 p.s.i., ductilities as measured by percent elongation (2 inches) in excess of 18% and good toughness. The steels are hot-rolled finished in the temperature range 1550.degree. F. to 1650.degree. F., cooled at a rate within the range 20.degree. F. to 135.degree. F. per second and collected by coiling or piling within a temperature range of 1025.degree. F. to 1175.degree. F. The steels modified by the incorporation of .01% to .10% of a rare earth are further characterized by improved formability.

    Steelmaking practice for production of a virtually inclusion-free
semi-killed product
    2.
    发明授权
    Steelmaking practice for production of a virtually inclusion-free semi-killed product 失效
    生产几乎不含杂质的半杀死产品的炼钢实践

    公开(公告)号:US3951645A

    公开(公告)日:1976-04-20

    申请号:US497999

    申请日:1974-08-16

    IPC分类号: C21C7/00 C21C7/02

    CPC分类号: C21C7/00 Y10T29/49988

    摘要: Total bath oxygen content and silicon input are controlled during a steelmaking process so that a cast and subsequently wrought product is characterized by being virtually free of elongated sulfide and silicate inclusions. Bendability properties of the wrought product are enhanced thereby.

    摘要翻译: 在炼钢过程中控制总浴氧含量和硅输入,使得铸造和随后锻造的产品的特征在于基本上不含细长的硫化物和硅酸盐夹杂物。 从而增强锻造产品的弯曲性能。

    Steel ladle desulfurization compositions and methods of steel
desulfurization
    3.
    发明授权
    Steel ladle desulfurization compositions and methods of steel desulfurization 失效
    钢包脱硫组合物及钢铁脱硫方法

    公开(公告)号:US4142887A

    公开(公告)日:1979-03-06

    申请号:US879610

    申请日:1978-02-21

    申请人: Leon Luyckx

    发明人: Leon Luyckx

    IPC分类号: C21C7/064 C21C7/02

    CPC分类号: C21C7/0645

    摘要: A ladle desulfurization composition and method are provided in which molten steel to be desulfurized is mixed with a mixture of particulate metallic aluminum, fluorspar and lime to deoxidize and desulfurize the metal and form a fluxed slag.

    摘要翻译: 提供了一种钢包脱硫组合物和方法,其中将要脱硫的钢水与颗粒状金属铝,氟石和石灰的混合物混合以使金属脱氧和脱硫并形成助熔渣。

    Method of purifying steel
    5.
    发明授权
    Method of purifying steel 失效
    钢的净化方法

    公开(公告)号:US4725310A

    公开(公告)日:1988-02-16

    申请号:US10550

    申请日:1987-02-03

    申请人: Leon Luyckx

    发明人: Leon Luyckx

    摘要: A method of purifying steel in a tundish, especially to remove alumina inclusions, comprises passing the steel through at least one refractory board having apertures through it and introducing inert gas into the steel at the upstream side of the foot of the board to cause a stream of bubbles to flow over the upstream side of the board. One of the boards may comprise a ceramic filter element. The boards may be non-vertical and have integral gas supply means. The apertures may taper, may have axes angled from perpendicular to the board's plane and may have high alumina content surfaces. The upstream side of the board may have an exothermic layer.

    摘要翻译: 在中间包中,特别是去除氧化铝夹杂物中的钢的净化方法包括使钢通过至少一个具有孔的耐火板,并在板的上游侧将惰性气体引入到钢中,引起流 的气泡流过电路板的上游侧。 其中一个板可以包括陶瓷过滤元件。 板可以是非垂直的并且具有一体的气体供应装置。 孔可以渐缩,可以具有垂直于板的平面成角度的轴并且可以具有高氧化铝含量的表面。 板的上游侧可以具有放热层。