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：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：US10662493B2

公开(公告)日：2020-05-26

申请号：US15114889

申请日：2015-01-26

Applicant: JFE STEEL CORPORATION

Inventor： Masao Yuga ,  Shinichi Miura ,  Akio Ohmori

IPC: C21D9/46 ,  C22C38/38 ,  C22C38/58 ,  C21D8/02 ,  C21D1/18 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54

Abstract: An abrasion resistant steel plate having excellent low-temperature toughness and excellent cracking resistance in a portion which has been heated to a temperature range in which low-temperature temper embrittlement occurs and a method for manufacturing the steel plate. The steel plate includes a microstructure at positions located at ¼ of the thickness and at ¾ of the thickness including a martensite single phase microstructure having an average prior austenaite grain diameter in the range of 20 μm to 60 μm, or a mixed microstructure of martensite and bainite having a proportion of martensite-austenite constituent of less than 5% in terms of area ratio with respect to the whole microstructure.

公开(公告)号：US10253385B2

公开(公告)日：2019-04-09

申请号：US14779627

申请日：2014-03-19

Applicant: JFE STEEL CORPORATION

Inventor： Akihide Nagao ,  Shinichi Miura ,  Nobuyuki Ishikawa

IPC: C21D8/02 ,  C22C38/00 ,  C22C38/32 ,  C22C38/54 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  B22D7/00 ,  C21D1/60 ,  C21D6/00

Abstract: Abrasion resistant steel plates with excellent low-temperature toughness and hydrogen embrittlement resistance having a Brinell hardness of 401 or more, and methods for manufacturing such steel plates. The steel plates have a lath martensitic structure with an average grain size of not more than 20 μm, and the steel plates include fine precipitates that are 50 nm or less in diameter and that have a density of 50 or more particles per 100 μm2. Additionally, the steel plates include, by mass %, C: 0.20 to 0.30%, Si: 0.05 to 0.5%, Mn: 0.5 to 1.5%, Cr: 0.05 to 1.20%, Nb: 0.01 to 0.08%, B: 0.0005 to 0.003%, Al: 0.01 to 0.08%, N: 0.0005 to 0.008%, P: not more than 0.05%, S: not more than 0.005%, and O: not more than 0.008%, the balance being Fe and inevitable impurities.

公开(公告)号：US10093998B2

公开(公告)日：2018-10-09

申请号：US14779576

申请日：2014-03-19

Applicant: JFE STEEL CORPORATION

Inventor： Akihide Nagao ,  Shinichi Miura ,  Nobuyuki Ishikawa

IPC: C21D9/46 ,  C22C38/00 ,  C22C38/32 ,  C22C38/54 ,  C21D8/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/40 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  B22D7/00 ,  C21D6/00 ,  C22C38/42

Abstract: Abrasion resistant steel plates with excellent low-temperature toughness having a Brinell hardness of 361 or more, and methods for manufacturing such steel plates. The steel plates have a lath martensitic structure with an average grain size of not more than 20 μm, and the steel plates include fine precipitates that are 50 nm or less in diameter and that have a density of 50 or more particles per 100 μm2. Additionally, the steel plates include, by mass %, C: 0.10 to less than 0.20%, Si: 0.05 to 0.5%, Mn: 0.5 to 1.5%, Cr: 0.05 to 1.20%, Nb: 0.01 to 0.08%, B: 0.0005 to 0.003%, Al: 0.01 to 0.08%, N: 0.0005 to 0.008%, P: not more than 0.05%, S: not more than 0.005%, and O: not more than 0.008%, the balance being Fe and inevitable impurities.

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：US20150147222A1

公开(公告)日：2015-05-28

申请号：US14406405

申请日：2013-07-18

Applicant: JFE STEEL CORPORATION

Inventor： Shinichi Miura ,  Yukio Shimbo ,  Nobuyuki Ishikawa

IPC: C22C38/46 ,  C22C38/14 ,  C22C38/12 ,  C22C38/00 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/16 ,  C22C38/08

CPC classification number: C22C38/46 ,  C21D6/001 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/46 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/40

Abstract: An object of the present invention is to provide an Ni-containing steel plate which is low in cost and has excellent low-temperature toughness. In view of the object, the Ni-containing steel plate of the present invention has a chemical composition containing by mass % C: 0.01% to 0.15%, Si: 0.02% to 0.20%, Mn: 0.45% to 2.00%, P: 0.020% or less, 5: 0.005% or less, Al: 0.005% to 0.100% Ni: 5.0 to 8.0%, and the balance being Fe and incidental impurities, and has a microstructure containing less than 1.7% by volume fraction of retained austenite when cooled to liquid nitrogen temperature, and having an average grain size of crystal grains surrounded by high-angle grain boundaries with an orientation difference of 15° or more of 5 μm or less by equivalent circle diameter.

Abstract translation: 本发明的目的在于提供一种低成本，低温韧性优异的含镍钢板。 鉴于此，本发明的含Ni钢板的化学成分含有C：0.01〜0.15质量％，Si：0.02〜0.20质量％，Mn：0.45〜2.00质量％，P： 0.020％以下，5：0.005％以下，Al：0.005〜0.100％Ni：5.0〜8.0％，余量为Fe及杂质，微观结构中残留奥氏体含量小于1.7％ 当冷却至液氮温度时，具有通过相等圆直径以15°以上的取向差为5μm以下的高角度晶界包围的晶粒的平均粒径。