公开(公告)号：US09738957B2

公开(公告)日：2017-08-22

申请号：US14412541

申请日：2013-07-29

Applicant: JFE STEEL CORPORATION

Inventor： Keiji Ueda ,  Shinichi Miura ,  Nobuyuki Ishikawa

IPC: C22C38/02 ,  C22C38/04 ,  C21D8/02 ,  C22C38/50 ,  C22C38/54 ,  C22C38/00 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18 ,  C22C38/22 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C21D6/00 ,  C21D9/46 ,  C22C38/08 ,  C22C38/16 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32

CPC classification number: C22C38/50 ,  C21D6/001 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/02 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/46 ,  C21D2211/002 ,  C21D2211/008 ,  C21D2221/10 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/54

Abstract: A wear resistant steel plate that exhibits excellent impact wear resistant properties and that is suitable for use in construction machinery, shipbuilding, steel pipes or tubes, civil engineering, construction and so on, and a method for manufacturing the same. The wear resistant steel plate includes a specific steel composition, where DI* defined by Formula 1 is 100-250, and has a surface layer part containing 90% or more in area ratio of martensite, a Brinell hardness of 450 HBW 10/3000 or more, and a central part in thickness direction of the steel plate containing 70% or more in area ratio of lower bainite, the central part representing a zone extending from a ½ position of the steel plate thickness to distances of 0.5 mm toward both surfaces of the steel plate. DI*=33.85×(0.1×C)0.5×(0.7×Si+1)×(3.33×Mn+1)×(0.35×Cu+1)×(0.36×Ni+1)×(2.16×Cr+1)×(3×Mo+1)×(1.75×V+1)×(1.5×W+1)  Formula 1 where the symbols of elements represent the contents by mass % of the elements, respectively.

公开(公告)号：US11959157B2

公开(公告)日：2024-04-16

申请号：US17264295

申请日：2019-07-31

Applicant: JFE STEEL CORPORATION

Inventor： Daichi Izumi ,  Shigeki Kitsuya ,  Keiji Ueda ,  Koichi Nakashima

IPC: C22C38/28 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/26 ,  C22C38/38

CPC classification number: C22C38/38 ,  C21D8/0226 ,  C21D8/0263 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/26 ,  C22C38/28 ,  C21D2211/001

Abstract: Provided is a high-Mn steel having excellent low-temperature toughness and excellent surface characteristics. A high-Mn steel comprises: a chemical composition containing, in mass %, C: 0.100 to 0.700%, Si: 0.05 to 1.00%, Mn: 20.0 to 35.0%, P: ≤0.030%, S: ≤0.0070%, Al: 0.010 to 0.070%, Cr: 0.50 to 5.00%, N: 0.0050 to 0.0500%, O: ≤0.0050%, Ti: ≤0.005%, and Nb: ≤0.005%, with a balance consisting of Fe and inevitable impurities; and a microstructure having austenite as a matrix, wherein in the microstructure, a Mn concentration of a Mn-concentrated portion is 38.0% or less, and an average KAM value is 0.3 or more, yield stress is 400 MPa or more, absorbed energy vE−196 in a Charpy impact test at −196° C. is 100 J or more, and percent brittle fracture is less than 10%.

公开(公告)号：US20240075560A1

公开(公告)日：2024-03-07

申请号：US18265497

申请日：2021-12-16

Applicant: JFE Steel Corporation

Inventor： Kazufumi Watanabe ,  Atsushi Takada ,  Akiyoshi Ando ,  Takatoshi Okabe ,  Keiji Ueda

IPC: B23K35/30 ,  B23K35/22

CPC classification number: B23K35/3073 ,  B23K35/222 ,  B23K35/308 ,  B23K2103/04

Abstract: A TIG welding filler metal is provided that has a composition including, by mass %, C: 0.20 to 0.80%, Si: 0.15 to 0.90%, Mn: 15.0 to 30.0%, P: 0.030% or less, S: 0.030% or less, Cr: 6.0 to 15.0%, and N: 0.120% or less, the balance being Fe and incidental impurities. Where necessary, the filler metal may contain one or two selected from Ni and Mo, may further contain one, or two or more selected from V, Ti, and Nb, and may additionally contain one, or two or more selected from Cu, Al, Ca, and REM. This configuration reduces the occurrence of welding cracks during TIG welding, that is, realizes excellent hot crack resistance, and allows for easy production of a weld joint having high strength and excellent cryogenic impact toughness.

公开(公告)号：US20150232971A1

公开(公告)日：2015-08-20

申请号：US14429557

申请日：2013-09-13

Applicant: JFE STEEL CORPORATION

Inventor： Shinichi Miura ,  Keiji Ueda ,  Nobuyuki Ishikawa ,  Naoki Takayama

IPC: C22C38/60 ,  C21D1/18 ,  C21D6/00 ,  C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/46 ,  C22C38/44 ,  C22C38/42 ,  C22C38/38 ,  C22C38/32 ,  C22C38/28 ,  C22C38/26 ,  C22C38/24 ,  C22C38/22 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D9/46

Abstract: An abrasion resistant steel plate which possesses excellent abrasion resistance, excellent low-temperature toughness and excellent corrosive wear resistance. The abrasion resistant steel plate includes the composition containing by mass %: 0.23% to 0.35% C, 0.05% to 1.00% Si, 0.1% to 2.0% Mn, 0.020% or less P, 0.005% or less S, 0.005% to 0.100% Al, 0.03% to 2.0% Cr, and 0.03% to 1.0% Mo in a state where DI* defined by the following formula (1) is satisfied 45 or more, and further containing remaining Fe and unavoidable impurities as a balance. The steel plate has a structure where an as-quenched martensitic phase forms a main phase and a grain size of prior austenite grains is 30 μm or less, and surface hardness of the steel plate is 450 or more at Brinel hardness HBW10/3000.

Abstract translation: 具有优异的耐磨性，优异的低温韧性和优异的耐腐蚀性的耐磨钢板。 耐磨钢板包含以质量％计含有：C：0.23〜0.35％，Si：0.05〜1.00％，Mn：0.1〜2.0％，P：0.020％以下，S：0.005％〜0.100 在满足下式（1）所示的DI *为45以上的状态下，还含有剩余的Fe和不可避免的杂质作为平衡值的情况下，Al为0.03％〜2.0％的Cr，0.03〜1.0％的Mo。 该钢板具有淬火后的马氏体相形成主相的结构，而前奥氏体晶粒的晶粒尺寸为30μm以下，并且钢板的表面硬度在布氏硬度HBW10 / 3000时为450以上。

公开(公告)号：US20150225822A1

公开(公告)日：2015-08-13

申请号：US14429499

申请日：2013-09-13

Applicant: JFE STEEL CORPORATION

Inventor： Shinichi Miura ,  Keiji Ueda ,  Nobuyuki Ishikawa

IPC: C22C38/60 ,  C21D6/00 ,  C22C38/50 ,  C22C38/48 ,  C22C38/46 ,  C22C38/44 ,  C22C38/42 ,  C22C38/32 ,  C22C38/28 ,  C22C38/26 ,  C22C38/24 ,  C22C38/22 ,  C22C38/14 ,  C22C38/12 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D1/18

CPC classification number: C22C38/60 ,  C21D1/18 ,  C21D1/185 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0247 ,  C21D9/46 ,  C21D2211/008 ,  C22C38/002 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50

Abstract: An abrasion resistant steel plate which possesses excellent abrasion resistance, excellent low-temperature toughness and excellent corrosive wear resistance. The abrasion resistant steel plate has the composition comprising by mass %: 0.10% to 0.20% C, 0.05% to 1.00% Si, 0.1% to 2.0% Mn, 0.020% or less P, 0.005% or less S, 0.005% to 0.100% Al, one or two kinds of components selected from a group consisting of 0.05% to 2.0% Cr and 0.05% to 1.0% Mo, and remaining Fe and unavoidable impurities as a balance. Content of solute Cr in steel (Crsol) and the content of solute Mo in steel (Mosol) satisfy the formula 0.05≧(Crsol+2.5Mosol)≧2.0. Steel plate has a structure where an as-quenched martensitic phase forms a main phase and a grain size of prior austenite grains is 30 μm or less, and surface hardness of the steel plate is 360 or more at Brinel hardness HBW10/3000.

Abstract translation: 具有优异的耐磨性，优异的低温韧性和优异的耐腐蚀性的耐磨钢板。 耐磨钢板的组成为：质量％：0.10〜0.20％，Si：0.05〜1.00％，Mn：0.1〜2.0％，P：0.020％以下，S：0.005〜0.100 ％Al，选自0.05％至2.0％的Cr和0.05％至1.0％的Mo中的一种或两种组分，剩余的Fe和不可避免的杂质作为平衡。 钢中的溶质Cr（Crsol）的含量和钢中的溶质Mo的含量（Mosol）满足式0.05≥（Crsol + 2.5Mosol）≥2.0。 钢板具有淬火后的马氏体相形成主相的结构，原奥氏体晶粒的晶粒尺寸为30μm以下，Brinel硬度HBW10 / 3000时钢板的表面硬度为360以上。

公开(公告)号：US20150184270A1

公开(公告)日：2015-07-02

申请号：US14412541

申请日：2013-07-29

Applicant: JFE STEEL CORPORATION

Inventor： Keiji Ueda ,  Shinichi Miura ,  Nobuyuki Ishikawa

IPC: C22C38/50 ,  C21D9/46 ,  C21D6/00 ,  C22C38/48 ,  C22C38/44 ,  C22C38/32 ,  C22C38/28 ,  C22C38/26 ,  C22C38/24 ,  C22C38/22 ,  C22C38/16 ,  C22C38/12 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/02

CPC classification number: C22C38/50 ,  C21D6/001 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/02 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/46 ,  C21D2211/002 ,  C21D2211/008 ,  C21D2221/10 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/54

Abstract: A wear resistant steel plate that exhibits excellent impact wear resistant properties and that is suitable for use in construction machinery, shipbuilding, steel pipes or tubes, civil engineering, construction and so on, and a method for manufacturing the same. The wear resistant steel plate includes a specific steel composition, where DI* defined by Formula 1 is 100-250, and has a surface layer part containing 90% or more in area ratio of martensite, a Brinell hardness of 450 HBW 10/3000 or more, and a central part in thickness direction of the steel plate containing 70% or more in area ratio of lower bainite, the central part representing a zone extending from a ½ position of the steel plate thickness to distances of 0.5 mm toward both surfaces of the steel plate. DI*=33.85×(0.1×C)0.5×(0.7×Si+1)×(3.33×Mn+1)×(0.35×Cu+1)×(0.36×Ni+1)×(2.16×Cr+1)×(3×Mo+1)×(1.75×V+1)×(1.5×W+1)  Formula 1 where the symbols of elements represent the contents by mass % of the elements, respectively.

Abstract translation: 具有优异的抗冲击性能的耐磨钢板及其制造方法，适用于工程机械，造船，钢管或管，土木工程，建筑等。 耐磨钢板包括特定的钢组合物，其中由式1定义的DI *为100-250，并且具有包含90％或更多的马氏体面积比的表面层部分，布氏硬度为450HBW 10/3000或 更多的是钢板的厚度方向的中心部分，其含有下贝氏体的面积比为70％以上，中心部分表示从钢板厚度的1/2位置延伸到0.5mm的距离， 钢板。 DI * = 33.85×（0.1×C）0.5×（0.7×Si + 1）×（3.33×Mn + 1）×（0.35×Cu + 1）×（0.36×Ni + 1）×（2.16×Cr + ）×（3×Mo + 1）×（1.75×V + 1）×（1.5×W + 1）式1的符号分别表示元素的质量％。

公开(公告)号：US20240033861A1

公开(公告)日：2024-02-01

申请号：US18265503

申请日：2021-10-13

Applicant: JFE Steel Corporation

Inventor： Kazufumi Watanabe ,  Atsushi Takada ,  Akiyoshi Ando ,  Takatoshi Okabe ,  Keiji Ueda

IPC: B23K35/30 ,  B23K35/02 ,  B23K9/18

CPC classification number: B23K35/3073 ,  B23K35/0261 ,  B23K9/18

Abstract: A submerged arc welding wire is provided that has a composition including, by mass %, C: 0.20 to 0.80%, Si: 0.15 to 0.90%, Mn: 15.0 to 30.0%, P: 0.030% or less, S: 0.030% or less, Cr: 6.0 to 15.0%, and N: 0.120% or less, the balance being Fe and incidental impurities. Where necessary, the wire may contain one or two selected from Ni and Mo, may further contain one, or two or more selected from V, Ti, and Nb, and may additionally contain one, or two or more selected from Cu, Al, Ca, and REM.

公开(公告)号：US20230211441A1

公开(公告)日：2023-07-06

申请号：US18016015

申请日：2021-07-13

Applicant: JFE Steel Corporation

Inventor： Atsushi Takada ,  Keiji Ueda

IPC: B23K35/02 ,  B23K35/30 ,  C22C38/58 ,  C22C38/02 ,  C22C38/06 ,  C22C38/44

CPC classification number: B23K35/0261 ,  B23K35/3073 ,  C22C38/58 ,  C22C38/02 ,  C22C38/06 ,  C22C38/44

Abstract: Provided is a solid wire for gas metal arc welding, solid wire being suitable as a welding material for high-Mn steel materials and generating less fume during welding. The solid wire of the present invention has a composition containing, in mass %, C: 0.20 to 0.80%, Si: 0.15 to 0.90%, Mn: 15.0 to 30.0%, P: 0.030% or less, S: 0.030% or less, Al: 0.020% or less, Ni: 0.01 to 10.00%, Cr: 6.0 to 15.0%, Mo: 0.01 to 3.50%, O: 0.010% or less, N: 0.120% or less, and the balance being Fe and incidental impurities.

公开(公告)号：US09982331B2

公开(公告)日：2018-05-29

申请号：US14429499

申请日：2013-09-13

Applicant: JFE STEEL CORPORATION

Inventor： Shinichi Miura ,  Keiji Ueda ,  Nobuyuki Ishikawa

IPC: C22C38/12 ,  C22C38/18 ,  C22C38/22 ,  C22C38/60 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/20 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C21D8/02 ,  C21D1/18 ,  C21D6/00 ,  C22C38/24 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C21D9/46

CPC classification number: C22C38/60 ,  C21D1/18 ,  C21D1/185 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0247 ,  C21D9/46 ,  C21D2211/008 ,  C22C38/002 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50

Abstract: An abrasion resistant steel plate which possesses excellent abrasion resistance, excellent low-temperature toughness and excellent corrosive wear resistance. The abrasion resistant steel plate has the composition comprising by mass %: 0.10% to 0.20% C, 0.05% to 1.00% Si, 0.1% to 2.0% Mn, 0.020% or less P, 0.005% or less S, 0.005% to 0.100% Al, one or two kinds of components selected from a group consisting of 0.05% to 2.0% Cr and 0.05% to 1.0% Mo, and remaining Fe and unavoidable impurities as a balance. Content of solute Cr in steel (Crsol) and the content of solute Mo in steel (Mosol) satisfy the formula 0.05≥(Crsol+2.5Mosol)≥2.0. Steel plate has a structure where an as-quenched martensitic phase forms a main phase and a grain size of prior austenite grains is 30 μm or less, and surface hardness of the steel plate is 360 or more at Brinel hardness HBW10/3000.

公开(公告)号：US20150007904A1

公开(公告)日：2015-01-08

申请号：US14371346

申请日：2013-01-08

Applicant: JFE Steel Corporation

Inventor： Akihiko Tanizawa ,  Mitsuhiro Okatsu ,  Keiji Ueda ,  Kimihiro Nishimura ,  Shinji Mitao

IPC: F16L9/17 ,  B23K25/00 ,  B23K9/025 ,  F16L9/02 ,  B21B3/02

CPC classification number: F16L9/17 ,  B21B3/02 ,  B23K9/0253 ,  B23K9/186 ,  B23K25/00 ,  B23K35/3053 ,  B23K35/3073 ,  B23K35/3602 ,  B23K35/3605 ,  B23K35/3607 ,  B23K2101/10 ,  C21D8/02 ,  C21D9/08 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/20 ,  C22C38/22 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/58 ,  F16L9/02

Abstract: In an abrasion resistant welded steel pipe, each of a base material and a weld metal contains specific amounts of chemical composition. The base material of the abrasion resistant welded steel pipe has a Vickers hardness within the range of 150 to 250, and the weld metal has a Vickers hardness within the range of 230 to 350. A weld heat affected zone in the abrasion resistant welded steel pipe has a Vickers hardness within the range of 150 to 350. In the weld metal, the dispersion density of a sulfide having an aspect ratio of 5 or more and containing at least one selected from Fe, Mn, and Ti is 10 grains/mm2 or less. The abrasion resistant welded steel pipe that can be produced at high productivity and low cost with no reduction in weld crack resistance can be provided.

Abstract translation: 在耐磨焊接钢管中，基材和焊接金属各自含有特定量的化学成分。 耐磨焊接钢管的基材的维氏硬度在150〜250的范围内，焊接金属的维氏硬度在230〜350的范围内。耐磨焊接钢管的焊接热影响区 维氏硬度在150〜350的范围内。在焊接金属中，纵横比为5以上且含有选自Fe，Mn和Ti中的至少一种的硫化物的分散密度为10个/ mm 2， 减。 可以提供可以以高生产率和低成本生产而不降低耐焊缝裂纹性的耐磨焊接钢管。