公开(公告)号：US20170253941A1

公开(公告)日：2017-09-07

申请号：US15500090

申请日：2015-07-29

Applicant: ArcelorMittal

Inventor： Sebastian Cobo ,  Juan David Puerta Velasquez ,  Martin Beauvais ,  Catherine Vinci

IPC: C21D9/46 ,  C21D1/673 ,  C21D1/18 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C23F17/00 ,  C22C38/58 ,  C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/44 ,  C22C38/00 ,  B21D22/02 ,  C21D8/02

Abstract: The present invention provides a rolled steel sheet, for press hardening, for which the chemical composition includes, with contents expressed by weight, 0.24%≦C≦0.38%, 0.40%≦Mn≦3%, 0.10%≦Si≦0.70%, 0.015%≦Al≦0.070%, 0%≦Cr≦2%, 0.25%≦Ni≦2%, 0.015%≦Ti≦0.10%, 0%≦Nb≦0.060%, 0.0005%≦B≦0.0040%, 0.003%≦N≦0.010%, 0.0001%≦S≦0.005%, 0.0001%≦P≦0.025%, it being understood that the titanium and nitrogen content satisfy: Ti/N>3.42, and that the carbon, manganese, chromium and silicon content satisfy: 2.6   C + Mn 5.3 + Cr 13 + Si 15 ≥ 1.1  % , with the chemical composition optionally including one or more of the following elements: 0.05%≦Mo≦0.65%, 0.001%≦W≦0.30%, 0.0005%≦Ca≦0.005%, with the remainder made up of iron and inevitable impurities coming from preparation. The sheet includes a nickel content Nisurf at any point of the steel near the surface of said sheet over a depth Δ, such that Nisurf>Ninom, where Ninom designates the nominal nickel content of the steel, and such that Nimax designates the maximum nickel content within Δ: ( Ni max + Ni nom ) 2 × ( Δ ) ≥ 0.6 and such that: ( Ni max + Ni nom ) Δ ≥ 0.01 , with the depth Δ expressed in microns and the Nimax and Ninom contents expressed in percentages by weight.

公开(公告)号：US20170298465A1

公开(公告)日：2017-10-19

申请号：US15610084

申请日：2017-05-31

Applicant: ArcelorMittal

Inventor： Sebastian Cobo ,  Juan David Puerta Velasquez ,  Martin Beauvais ,  Catherine Vinci

IPC: C21D9/00 ,  B21B3/02 ,  C23C2/12 ,  C23C2/06 ,  C22C38/58 ,  C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/44 ,  C22C38/14 ,  C22C38/12 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C23C2/28 ,  C21D1/06 ,  C21D8/00 ,  C23C2/40

CPC classification number: C21D9/0068 ,  B21B3/02 ,  B21D22/022 ,  C21D1/06 ,  C21D1/18 ,  C21D1/673 ,  C21D8/005 ,  C21D8/02 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0273 ,  C21D8/0278 ,  C21D9/46 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18 ,  C22C38/38 ,  C22C38/40 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  C23C2/06 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40 ,  C23F17/00

Abstract: The present invention provides a rolled steel sheet, for press hardening, for which the chemical composition includes, with contents expressed by weight, 0.24%≦C≦0.38%, 0.40%≦Mn≦3%, 0.10%≦Si≦0.70%, 0.015%≦Al≦0.070%, 0%≦Cr≦2%, 0.25%≦Ni≦2%, 0.015%≦Ti≦0.10%, 0%≦Nb≦0.060%, 0.0005%≦B≦0.0040%, 0.003%≦N≦0.010%, 0.0001%≦S≦0.005%, 0.0001%≦P≦0.025%, it being understood that the titanium and nitrogen content satisfy: Ti/N>3.42, and that the carbon, manganese, chromium and silicon content satisfy: 2.6  C + Mn 5.3 + Cr 13 + Si 15 ≥ 1.1  % , with the chemical composition optionally including one or more of the following elements: 0.05%≦Mo≦0.65%, 0.001%≦W≦0.30%, 0.0005%≦Ca≦0.005%, with the remainder made up of iron and inevitable impurities coming from preparation. The sheet includes a nickel content Nisurf at any point of the steel near the surface of said sheet over a depth Δ, such that Nisurf>Ninom, where Ninom designates the nominal nickel content of the steel, and such that Nimax, designates the maximum nickel content within Δ: ( Ni ma   x + Ni nom ) 2 × ( Δ ) ≥ 0.6 and such that: ( Ni max - Ni nom ) Δ ≥ 0.01 , with the depth Δ expressed in microns and the Nimax and Ninom contents expressed in percentages by weight.

公开(公告)号：US11976342B2

公开(公告)日：2024-05-07

申请号：US17943561

申请日：2022-09-13

Applicant: ArcelorMittal

Inventor： Sebastian Cobo ,  Christian Allely ,  Martin Beauvais ,  Anis Aouafi ,  Emmanuel Lucas

IPC: C21D9/48 ,  B32B15/01 ,  C21D1/673 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40

CPC classification number: C21D9/48 ,  B32B15/012 ,  B32B15/013 ,  C21D1/673 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C22C38/001 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C23C2/02 ,  C23C2/022 ,  C23C2/024 ,  C23C2/06 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40 ,  C21D2211/002 ,  C21D2211/008

Abstract: A rolled steel sheet, for press hardening is provided, having a chemical composition where Ti/N>3.42, and the carbon, manganese, chromium and silicon contents satisfy:






2.6

C

+

Mn
5.3

+

Cr
13

+

Si
15


≥

1.1

%
.






The sheet has a nickel content Nisurf at any point of the steel in the vicinity of the surface over a depth Δ, such that: Nisurf>Ninom, Ninom denoting the nominal nickel content of the steel, and such that, Nimax denoting the maximum nickel content within Δ:









(


Ni
max

+

Ni
nom


)

2

×

(
Δ
)


≥
0.6

,




and such that:







(


Ni
max

-

Ni
nom


)

Δ

≥
0.01




and the surface density of all of the particles Di, and the surface density of the particles D(>2 μm) larger than 2 micrometers satisfy, at least to a depth of 100 micrometers in the vicinity of the surface of said sheet:

Di+6.75D(>2 μm) 2 μm) being expressed as number of particles per square millimeter, and said particles denoting all the oxides, sulfides, and nitrides, either pure or combined such as oxysulfides and carbonitrides, present in the steel matrix.

公开(公告)号：US11629388B2

公开(公告)日：2023-04-18

申请号：US16616937

申请日：2018-06-01

Applicant: ArcelorMittal

Inventor： Martin Beauvais ,  Alice Dumont ,  Alexandre Gibot ,  Astrid Perlade ,  Kangying Zhu

IPC: C21D9/50 ,  C21D9/46 ,  C21D8/04 ,  B32B15/01 ,  C21D6/00 ,  C22C38/38 ,  C22C38/28 ,  C22C38/26 ,  C22C38/22 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00 ,  C22C38/32

Abstract: A steel sheet for the manufacture of a press hardened part is provided, having a composition of: 0.15%≤C≤0.22%, 3.5%≤Mn

公开(公告)号：US11473166B2

公开(公告)日：2022-10-18

申请号：US16617903

申请日：2018-05-30

Applicant: ArcelorMittal

Inventor： Sebastian Cobo ,  Christian Allely ,  Martin Beauvais ,  Anis Aouafi ,  Emmanuel Lucas

IPC: C21D9/48 ,  B32B15/01 ,  C21D1/673 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40

Abstract: A rolled steel sheet, for press hardening is provided, having a chemical composition where Ti/N>3.42, and the carbon, manganese, chromium and silicon contents satisfy: 2.6 ⁢ C + Mn 5.3 + Cr 13 + Si 15 ≥ 1.1 ⁢ % . The sheet has a nickel content Nisurf at any point of the steel in the vicinity of the surface over a depth Δ, such that: Nisurf >Ninom, Ninom denoting the nominal nickel content of the steel, and such that, Nimax denoting the maximum nickel content within Δ: ( Ni max + Ni nom ) 2 × ( Δ ) ≥ 0.6 , and such that: ( Ni max - Ni nom ) Δ ≥ 0.01 and the surface density of all of the particles Di and the surface density of the particles D(>2 μm) larger than 2 micrometers satisfy, at least to a depth of 100 micrometers in the vicinity of the surface of said sheet: Di+6.75 D(>2 μm) 2 μm) being expressed as number of particles per square millimeter, and said particles denoting all the oxides, sulfides, and nitrides, either pure or combined such as oxysulfides and carbonitrides, present in the steel matrix.

公开(公告)号：US20210214816A1

公开(公告)日：2021-07-15

申请号：US17217770

申请日：2021-03-30

Applicant: ArcelorMittal

Inventor： Sebastian Cobo ,  Juan David Puerta Velasquez ,  Martin Beauvais ,  Catherine Vinci

IPC: C21D9/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C21D8/02 ,  C23C2/06 ,  C21D1/673 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40 ,  C22C38/18 ,  C22C38/40 ,  C22C38/38 ,  C21D9/46 ,  B21D22/02 ,  C21D1/18 ,  C22C38/00 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  C23F17/00 ,  B21B3/02 ,  C21D1/06 ,  C21D8/00 ,  C22C38/12 ,  C22C38/14

Abstract: The present invention provides fabrication methods for cold rolled, precoated and press hardened steel sheets, for which the chemical composition includes, with contents expressed by weight, 0.24%≤C≤0.38%, 0.40%≤Mn≤3%, 0.10%≤Si≤0.70%, 0.015%≤Al≤0.070%, 0%≤Cr≤2%, 0.25%≤Ni≤2%, 0.015%≤Ti≤0.10%, 0%≤Nb≤0.060%, 0.0005%≤B≤0.0040%, 0.003%≤N≤0.010%, 0.0001%≤S≤0.005%, 0.0001%≤P≤0.025%, it being understood that the titanium and nitrogen content satisfy: Ti/N>3.42, and that the carbon, manganese, chromium and silicon content satisfy: 2.6C+Mn/5.3+Cr/13+Si/15≥1.1%, with the chemical composition optionally including one or more of the following elements: 0.05%≤Mo≤0.65%, 0.001%≤W≤0.30%, 0.0005%≤Ca≤0.005%, with the remainder made up of iron and inevitable impurities coming from preparation.

公开(公告)号：US09845518B2

公开(公告)日：2017-12-19

申请号：US15610084

申请日：2017-05-31

Applicant: ArcelorMittal

Inventor： Sebastian Cobo ,  Juan David Puerta Velasquez ,  Martin Beauvais ,  Catherine Vinci

IPC: C21D9/00 ,  B21B3/02 ,  C22C38/58 ,  C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/44 ,  C22C38/14 ,  C22C38/12 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C23C2/06 ,  C23C2/12 ,  C23C2/40 ,  C23C2/28 ,  C21D8/00 ,  C21D1/06

CPC classification number: C21D9/0068 ,  B21B3/02 ,  B21D22/022 ,  C21D1/06 ,  C21D1/18 ,  C21D1/673 ,  C21D8/005 ,  C21D8/02 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0273 ,  C21D8/0278 ,  C21D9/46 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18 ,  C22C38/38 ,  C22C38/40 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  C23C2/06 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40 ,  C23F17/00

Abstract: The present invention provides a rolled steel sheet, for press hardening, for which the chemical composition includes, with contents expressed by weight, 0.24%≦C≦0.38%, 0.40%≦Mn≦3%, 0.10%≦Si≦0.70%, 0.015%≦Al≦0.070%, 0%≦Cr≦2%, 0.25%≦Ni≦2%, 0.015%≦Ti≦0.10%, 0%≦Nb≦0.060%, 0.0005%≦B≦0.0040%, 0.003%≦N≦0.010%, 0.0001%≦S≦0.005%, 0.0001%≦P≦0.025%, it being understood that the titanium and nitrogen content satisfy: Ti/N>3.42, and that the carbon, manganese, chromium and silicon content satisfy: 2.6 ⁢ C + Mn 5.3 + Cr 13 + Si 15 ≥ 1.1 ⁢ % , with the chemical composition optionally including one or more of the following elements: 0.05%≦Mo≦0.65%, 0.001%≦W≦0.30%, 0.0005%≦Ca≦0.005%, with the remainder made up of iron and inevitable impurities coming from preparation. The sheet includes a nickel content Nisurf at any point of the steel near the surface of said sheet over a depth Δ, such that Nisurf>Ninom, where Ninom designates the nominal nickel content of the steel, and such that Nimax designates the maximum nickel content within Δ: ( Ni max + Ni nom ) 2 × ( Δ ) ≥ 0.6 and such that: ( Ni max - Ni nom ) Δ ≥ 0.01 , with the depth Δ expressed in microns and the Nimax and Ninom contents expressed in percentages by weight.