公开(公告)号：US20200087748A1

公开(公告)日：2020-03-19

申请号：US16470784

申请日：2017-12-19

Applicant: POSCO

Inventor： Se Il LEE ,  June Soo PARK ,  Jae Hoon KIM

IPC: C21D9/46 ,  C22C38/16 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/12 ,  C21D8/00 ,  C21D6/00 ,  H01F1/147

Abstract: The non-oriented electrical steel sheet according to one embodiment of the present invention includes: by weight, 2.0% to 4.0% of Si; 0.001% to 2.0% of Al; 0.0005% to 0.009% of S; 0.02% to 1.0% of Mn, 0.0005% to 0.004% of N; 0.004% or less of C (excluding 0%); 0.005% to 0.07% of Cu; 0.0001% to 0.007% of O; individually or in a total amount of 0.05% to 0.2% of Sn or P; and the remainder comprising Fe and impurities; wherein the non-oriented electrical steel sheet is composed of a surface portion to 2 μm from the surface of the steel sheet in the thickness direction and a base portion exceeding 2 μm from the surface of the steel sheet in the thickness direction, and wherein the number of surfides having a diameter of 10 nm to 100 nm is larger than the number of the nitrides having a diameter of 10 nm to 100 nm, in the same area of base portion.

公开(公告)号：US20190010567A1

公开(公告)日：2019-01-10

申请号：US16065018

申请日：2016-07-27

Applicant: POSCO

Inventor： Jung Woo KIM ,  Ji Hyun KIM ,  Jae Song KIM ,  Jae Hoon KIM

IPC: C21D8/12 ,  C09J11/04 ,  C09J201/02 ,  C21D1/30 ,  C08K3/32 ,  C08K3/22

Abstract: The present invention relates to a non-oriented electrical steel sheet adhesive coating composition including the constituent elements below, a non-oriented electrical steel sheet product, and a manufacturing method thereof. The non-oriented electrical steel sheet adhesive coating composition includes: a first component including an organic/inorganic composite; and a second component including a composite metal phosphate, wherein the organic/inorganic composite is formed by having inorganic nanoparticles chemically substituted with some functional groups in an organic resin, the organic resin is one, or two or more, selected from an epoxy-based resin, an ester-based resin, an acrylic resin, a styrene-based resin, a urethane-based resin, and an ethylene-based resin, and the inorganic nanoparticles are one, or two or more, selected from SiO2, Al2O3, TiO2, MgO, ZnO, and ZrO2.