Abstract: Provided is an unconstrained vibration damping metal sheet with foam pores. The unconstrained vibration damping metal sheet of the present invention comprises: a metal sheet; an organic-inorganic pretreatment layer containing an acrylic resin formed on the metal sheet; and a foam resin layer formed on the pretreatment layer, the foam resin layer containing, based on weight % thereof, a thermoplastic polyvinyl chloride resin: 40-80%, a plasticizer: 5-40%, a foaming agent: 0.1-10%, an oxide-based crosslinker: 1-4%, and spherical silica: 1-10%.
Type:
Application
Filed:
November 30, 2021
Publication date:
March 21, 2024
Applicant:
POSCO Co., Ltd
Inventors:
Jin-Tae Kim, Dae-Gyu Kang, Yang-Ho Choi, Jung-Hwan Lee
Abstract: The present invention relates to a pressure vessel steel plate having excellent high temperature PWHT resistance, comprising: 0.10-0.16 weight % C; 0.20-0.35 weight % Si; 0.4-0.6 weight % Mn; 7.5-8.5 weight % Cr; 0.7-1.0 weight % Mo; 0.005-0.05 weight % Al; 0.015 weight % or less P, 0.002 weight % or less S; 0.001-0.025 weight % Nb; and 0.25-0.35 weight % V, with the remainder being Fe and unavoidable impurities.
Abstract: A plated steel wire, according to one aspect of the present invention, comprises: a base steel wire; and a zinc alloy plated layer. The zinc alloy plated layer comprises, in percentage by weight: 1.0% to 3.0% of AI; 1.0% to 2.0% of Mg; 0.5% to 5.0% of Fe; and the balance being Zn and unavoidable impurities, and includes a Zn/MgZn2/AI ternary eutectic structure, a Zn single-phase structure, and an Fe—Zn-AI-based crystal structure, wherein the Fe—Zn-AI-based crystal structure is formed adjacent to the base steel wire, and can have an average thickness of ? to ½ with respect to an average thickness of the zinc alloy plated layer.
Abstract: It is introduced that a device of manufacturing lithium sulfate comprising: a reaction body in which a reaction of lithium phosphate and sulfuric acid is performed, the reaction body being divided into an upper space and a lower space; a pressurizer for applying pressure to the inside of the reaction body; a stirrer disposed in the upper space for stirring the lithium phosphate and sulfuric acid to produce a mixture containing lithium sulfate and phosphoric acid; and a filter disposed inside the reaction body and separating the filtrate containing the phosphoric acid into the lower space by filtering the mixture.
Type:
Grant
Filed:
August 2, 2019
Date of Patent:
March 19, 2024
Assignees:
POSCO CO., LTD, RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
Inventors:
Juyoung Kim, Ki Young Kim, Woonkyoung Park, Jung Kwan Park, Woo Chul Jung, Kwang Seok Park, Hyun Woo Lee, Sang Won Kim, Heok Yang, Seung Taek Kuk
Abstract: A filtering panel includes a molding layer part; a pattern layer part having an incident surface through which light emitted from a light source and viewing light transmitted to an observer enter, and an accommodation surface which is the reverse surface of the incident surface, wherein the molding layer part is stacked on the incident surface so as to be adjacent thereto, and the pattern layer part adjusts the optical paths of the emitted light and the viewing light; and a filtering layer part formed on a lower incident surface of the pattern layer part having the incident surface of the viewing light that enters from a lower region below a horizontal reference line, wherein the reflectivity of the visible light in the viewing light incident on the lower region is made greater than that of an upper region above the reference line by means of mirror reflection.
Type:
Grant
Filed:
November 27, 2019
Date of Patent:
March 19, 2024
Assignees:
POSCO CO., LTD, RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
Inventors:
Sung-Ju Tark, Kun-Hoon Baek, Jun-Hong Kim, Youn-Joung Choi, Ji-Sang Park
Abstract: Disclosed are a hot press-formed article and a method for manufacturing the same. The article is manufactured by hot press forming a galvanized steel sheet comprising a base steel plate and a zinc-based coat layer formed on a surface of the base steel plate, wherein the zinc-based coat layer contains at least one element selected from the group consisting of Sb, Sn, and Bi in a total amount of 0.05% to 2.0% by weight, and a balanced amount of Zn and inevitable impurities, at least 70% by weight of the at least one element selected from the group consisting of Sb, Sn, Bi being concentrated in a region 3 ?m or less distant from the surface of an alloyed zinc-based coat layer, formed by alloying the zinc-based coat layer, of the hot press-formed article.
Type:
Application
Filed:
October 30, 2023
Publication date:
March 14, 2024
Applicant:
POSCO CO., LTD
Inventors:
Hyeon-Seok Hwang, Il-Ryoung Sohn, Jong-Sang Kim
Abstract: A grain-oriented electrical steel sheet according to an embodiment of the present invention comprises, by wt %, 2.0-4.0% of Si, 0.04-0.2% of Mn, 0.010% or less of N (excluding 0%), 0.005% or less of C (excluding 0%), 0.03-0.08% of Sn and 0.01-0.2% of Cr, the balance of Fe and inevitable impurities, and inclusions comprising at least one from among AlN, (Al,Si)N, (Al,Si,Mn)N, MnS, CuS and Al2O3, wherein the average diameter of the inclusions is 0.5-6.0 ?m, and 40-130/mm2 inclusions having a diameter of 6.0 ?m or less from among the inclusions can be included.
Abstract: Provided are a QT heat treated high carbon hot rolled steel sheet, a high carbon cold rolled steel sheet, a QT heat treated high carbon cold rolled steel sheet, and manufacturing methods thereof, wherein the QT heat treated high carbon hot rolled steel sheet comprises, in weight %, C: 1.0-1.4%, Si: 0.1-0.4%, Mn: 0.1-0.8%, Cr: 0.3-11%, W: 0.05-2.5%, P: 0.03% or less, S: 0.03% or less, Al: 0.02% or less, and the balance being Fe and other inevitable impurities, the average size of carbides being 0.1-20 ?m.
Abstract: Stainless steel for a fuel cell separator plate and a manufacturing method therefor are disclosed. The stainless steel for a fuel cell separator plate, according to one embodiment of the present invention, comprises: a stainless base material; and a passive film formed on the stainless base material, wherein a Cr/Fe atomic weight ratio in a 1 nm or less thickness region of the stainless base material, which is adjacent to an interface between the stainless and the passive film, is 0.45 or more. Therefore, by modifying the surface of the stainless steel for a fuel cell separator plate, a low interface contact resistance and a good corrosion resistance can be obtained, and a separate additional process such as precious metal coating can be removed, such that manufacturing costs are reduced and productivity can be improved.
Type:
Grant
Filed:
July 29, 2016
Date of Patent:
March 5, 2024
Assignee:
POSCO CO., LTD
Inventors:
Kwang Min Kim, Jong Hee Kim, Ki Hoon Jo, Bo Sung Seo
Abstract: An method of manufacturing a hot press-formed member comprises heating a blank of an aluminum-based plated steel sheet in a heating furnace, removing the heated blank from the heating furnace and conveying the removed blank between an upper mold portion and a lower mold portion of a mold, mounted on a press, to be seated; and performing a forming process after the upper mold portion of the mold is in contact with the seated blank.
Abstract: Provided is a density clad steel sheet having excellent strength and plateability, the clad steel sheet including a base metal, and a clad material provided at both sides of the base metal, wherein the base metal is a ferrite-austenitic duplex lightweight steel sheet comprising, by wt %, 0.3-0.7% of C, 2.0-9.0% of Mn, 4.5-8.0% of Al and the balance of Fe and inevitable impurities, and the clad material is a ferrite carbon steel comprising, by wt %, 0.0005-0.2% of C, 0.05-2.5% of Mn and the balance of Fe and inevitable impurities.
Abstract: Disclosed are wire rods and parts with improved delayed fracture resistance, and methods for manufacturing the same. The wire rod with improved delayed fracture resistance according to the present disclosure contains, by wt %, 0.15-0.30% of C, 0.15-0.25% of Si, 0.95-1.35% of Mn, 0.030% or less of P, 0.030% or less of S, 0.015-0.030% of Ti, 0.0010-0.0040% of B, 0.0010-0.0080% of N, and Fe and inevitable impurities as the balance, and satisfies formula 1 of 2.0?5.5×[Si]+[Mn]?2.4, where [Si] and [Mn] represent the contents (wt %) of the corresponding elements.
Abstract: The present invention relates to an alloy-coated steel sheet comprising: a steel sheet, and Al—Mg—Si—Zn alloy layer positioned on the steel sheet, wherein the Al—Mg—Si—Zn alloy layer comprises a Mg—Zn alloy phase, and wherein the Mg—Zn alloy phase comprises MgZn2 and Mg2Zn11, and the Mg—Zn alloy phase further comprises at least one of MgZn, Mg21Zn25, Mg51Zn20 and Mg2Zn3.
Type:
Grant
Filed:
December 18, 2019
Date of Patent:
February 20, 2024
Assignees:
POSCO CO., LTD, RESEARCH INSTITUTTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
Inventors:
Ji Hoon Yang, Jae In Jeong, Kyung Hwang Lee, Yong Hwa Jung, Tae Yeob Kim
Abstract: The present disclosure relates to a CHQ wire rod that has improved resistance to hydrogen delayed fracture while securing cold forging characteristics by reducing Si content and adding Mo and V, a processed product using the same, and a manufacturing method thereof. In accordance with an aspect of the present disclosure, a CHQ wire rod includes, in percent (%) by weight of the entire composition, C: 0.3 to 0.5%, Si: 0.1 to 0.3%, Mn: 0.5 to 1.0%, at least two or more of Cr: 0.5 to 1.5%, Mo: 0.5 to 1.5%, V: 0.01 to 0.2%, the remainder of iron (Fe) and other inevitable impurities, and the value of the following formula (1) is 3.56 or more.
Type:
Grant
Filed:
August 29, 2019
Date of Patent:
February 20, 2024
Assignee:
POSCO CO., LTD
Inventors:
Byung-In Jung, Sang-Yoon Lee, Han Hwi Kim
Abstract: The present disclosure relates to an aluminum-based plated steel that is provided for vehicles by hot forming, an aluminum-based alloy plated steel manufactured using the same, and method of manufacturing thereof.
Type:
Grant
Filed:
March 14, 2023
Date of Patent:
February 20, 2024
Assignee:
POSCO CO., LTD
Inventors:
Jin-Keun Oh, Il-Ryoung Sohn, Seong-Woo Kim, Jeom-Soo Shin
Abstract: The present invention relates to a composite steel sheet having excellent adhesiveness, and a manufacturing method therefor, and, more particularly, to a light composite steel sheet obtained by forming microstructures on the surface and inside of a plated steel sheet, and then bonding same with a plastic layer to maximize adhesiveness.
Type:
Application
Filed:
December 9, 2021
Publication date:
February 15, 2024
Applicant:
POSCO Co., Ltd
Inventors:
Hye-Jin Yoo, Chang-Se Byeon, Jung-Su Kim, Je-Hoon Baek, Kang-Min Lee
Abstract: The present invention relates to: a steel sheet for a seismic damper used to provide a structure with seismic resistance against earthquakes; and a manufacturing method of same, and more specifically, to a steel sheet which is for a seismic damper and has a superior toughness property, and a manufacturing method of same.
Type:
Application
Filed:
November 30, 2021
Publication date:
February 15, 2024
Applicant:
POSCO CO., LTD
Inventors:
Jae-Young CHO, Sang-Deok KANG, Kyung-Tae KIM
Abstract: Disclosed are a wire rod and a steel wire for a spring, a spring with improved fatigue resistance and nitriding property, and methods for manufacturing same. The wire rod for a spring with improved fatigue resistance and nitriding property according to the present disclosure contains, by wt %, 0.6-0.7% of C, 2.0-2.5% of Si, 0.2-0.5% of Mn, 0.9-1.6% of Cr, 0.015% of less of P, 0.01% of less of S, 0.01% of less of Al, 0.007% of less of N, 0.1-0.25% of Mo, 0.1-0.25% of V, and Fe and inevitable impurities as the balance, wherein Cr+Mn is 1.8% or less, Mo/V is 1.5 or less, and the microstructure includes 60% or more of a pearlite structure in the C section.
Abstract: Disclosed in the present specification are: a high-strength wire rod for cold heading, having superior heat treatment characteristics and resistance of hydrogen-delayed fracture characteristics, the rod being applicable to a bolt, etc.; a heat-treated component; and a method for manufacturing the same. According to an exemplary embodiment, the high-strength wire rod for cold heading with superior heat treatment characteristics and resistance of hydrogen-delayed fracture characteristics comprises, by wt %, 0.3-0.6% of C, 0.05-0.3% of Si, 0.2-1.0% of Mn, 0.5-2.0% of Cr, 0.5-2.0% of Mo, 0.02-0.05% of Al, 0.01-0.03% of N, and Fe and other impurities as the balance, and has a microstructure comprising, by area fraction, 80% or more of bainite, 1-15% of pearlite and 0.1-2% of martensite, and comprises 2×1019/m3 or more of aluminum nitride having a diameter of 5-50 nm.
Abstract: The present invention relates to a high-strength cold-rolled enamel steel sheet and a method of manufacturing same, the enamel steel sheet comprising, in weight %, C:0.01-0.1%, Mn:0.05-0.4%, Si:0.001-0.03%, Al:0.03-0.12%, P:0.02-0.04%, S:0.001-0.02%, Cu: 0.03-0.08%, Mo:0.13-0.30%, N: 0.004% or less, 0:0.003% or less, and the balance being Fe and inevitable impurities, wherein the high-strength cold-rolled enamel steel sheet has an oxide layer with a thickness of 0.006-0.030 ?m formed in an inward direction from the surface thereof and satisfies formulas (1) and (2), and thus has no bubble defects and excellent fish scale resistance and enamel adhesion after enamel treatment.