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公开(公告)号：US20150122083A1
公开(公告)日：2015-05-07
申请号：US14400908
申请日：2013-05-13
Applicant: POSCO
Inventor： Ja Yong Choi , Seung Min Han , Sun Koo Kim , Hee Ho Lee , Sang Yuel Jung , Young Jong Seo
CPC classification number: C21C7/00 , B22D1/00 , B22D11/116 , B22D11/118 , B22D41/00 , B22D41/08 , C21C7/0075 , C21C7/06 , C21C7/076 , Y02P10/242
Abstract: Provided are a method and a refining device for producing molten steel of outstanding cleanliness, and more particularly provides a method and device for refining inclusions by forming droplets from molten steel and dropping same into slag during pre-processing in a continuous casting process in a steel-making process. Also, provided is a method for producing high cleanliness molten steel comprising a molten-steel supply device for supplying molten steel and a molten-steel refining device for containing and refining molten steel poured into the molten-steel supply device, wherein the method comprises: a molten-steel pouring step in which molten steel is poured from the molten-steel supply device into the molten-steel refining device; a droplet-forming step in which the molten steel which has been poured in is formed into droplets in the molten-steel refining device; a slag-pass-through step in which the molten steel which has been formed into droplets is dropped so as to pass through slag; and an inclusion-removing step in which residual inclusions in the molten steel, which has been formed into droplets, are removed while passing through the slag.
Abstract translation: 提供了一种用于生产出色清洁度的钢水的方法和精炼装置，更具体地提供了一种用于在钢的连续铸造工艺中的预处理中从钢水中形成液滴并将其滴入炉渣中来精炼夹杂物的方法和装置 制造过程。 此外，还提供了一种生产高清洁度钢水的方法，其包括用于供应钢水的钢水供应装置和用于容纳和精炼浇注到钢水供应装置中的钢水的钢水精炼装置，其中该方法包括： 将钢水从钢水供给装置注入钢水精炼装置的钢水浇注工序; 在钢水精炼装置中，已投入的钢水形成液滴的液滴形成工序; 将已形成液滴的钢水落下以通过炉渣的渣渣通过工序; 以及夹杂物去除步骤，其中已经形成为液滴的钢水中的残留夹杂物在通过炉渣时被去除。
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2.发明申请公开(公告)号：US20200299816A1
公开(公告)日：2020-09-24
申请号：US16765615
申请日：2018-08-10
Applicant: POSCO
Inventor： Ji Soo Kim , Hak Kim , Ja Yong Choi , Young-Jong Seo
Abstract: Disclosed is a non-magnetic austenitic stainless steel with excellent corrosion resistance which is applicable to an environment requiring corrosion resistance along with excellent non-magnetic properties, and manufacturing method thereof. The non-magnetic austenitic stainless steel with excellent corrosion resistance according to an embodiment of the present disclosure includes, in percent (%) by weight of the entire composition, C: 0.05% or less, Si: 1.0% or less, Mn: 0.5 to 2.0%, Cr: 16 to 24%, Ni: 10 to 16%, N: 0.2% or less, the remainder of iron (Fe) and other inevitable impurities, and satisfies a following equation (1). Ni≥−2.7−5.8*C−1.77*Si−0.066*Mn+0.893*Cr+1.05*Mo−0.88*Cu−13.8*N (1)
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公开(公告)号：US09752202B2
公开(公告)日：2017-09-05
申请号：US14400908
申请日：2013-05-13
Applicant: POSCO
Inventor： Ja Yong Choi , Seung Min Han , Sun Koo Kim , Hee Ho Lee , Sang Yuel Jung , Young Jong Seo
IPC: B22D41/00 , C21C7/00 , C21C7/076 , B22D11/118 , B22D41/08 , B22D1/00 , B22D11/116 , C21C7/06
CPC classification number: C21C7/00 , B22D1/00 , B22D11/116 , B22D11/118 , B22D41/00 , B22D41/08 , C21C7/0075 , C21C7/06 , C21C7/076 , Y02P10/242
Abstract: Provided are a method and a refining device for producing molten steel of outstanding cleanliness, and more particularly provides a method and device for refining inclusions by forming droplets from molten steel and dropping same into slag during pre-processing in a continuous casting process in a steel-making process. Also, provided is a method for producing high cleanliness molten steel comprising a molten-steel supply device for supplying molten steel and a molten-steel refining device for containing and refining molten steel poured into the molten-steel supply device, wherein the method comprises: a molten-steel pouring step in which molten steel is poured from the molten-steel supply device into the molten-steel refining device; a droplet-forming step in which the molten steel which has been poured in is formed into droplets in the molten-steel refining device; a slag-pass-through step in which the molten steel which has been formed into droplets is dropped so as to pass through slag; and an inclusion-removing step in which residual inclusions in the molten steel, which has been formed into droplets, are removed while passing through the slag.
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