-
公开(公告)号：US20220017987A1
公开(公告)日：2022-01-20
申请号：US17491785
申请日：2021-10-01
Applicant: ArcelorMittal
Inventor： Pascal Drillet , Maria Poirier , Sujay Sarkar
IPC: C21D9/46 , B32B15/01 , C22C38/00 , C22C38/02 , C22C38/06 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/38 , B21D22/02 , C21D1/673 , C21D8/02 , C22C38/46 , C22C38/44 , C22C38/50 , C22C38/54 , C22C38/48 , C22C21/02 , B23K26/21 , B21B1/22 , C21D6/00 , C22C38/22 , C23C2/12
Abstract: A press hardened steel part is provided. The steel of the part has a chemical composition including, in weight: 0.062%≤C≤0.095%, 1.4%≤Mn≤1.9%, 0.2%≤Si≤0.5%, 0.020%≤Al≤0.070%, 0.02%≤Cr≤0.1%, wherein: 1.5%≤(C+Mn+Si+Cr)≤2.7%, 0.040%≤Nb≤0.060%, 3.4×N≤Ti≤8×N wherein: 0.044%≤(Nb+Ti)≤0.090%, 0.0005≤B≤0.004%, 0.001%≤N≤0.009%, 0.0005%≤S≤0.003%, 0.001%≤P≤0.020%, optionally: 0.0001%≤Ca≤0.003%, and the remainder being Fe and unavoidable impurities. The microstructure of the part includes, in a majority of the part, in surface fractions: less than 40% of bainite, less than 5% of austenite, less than 5% of ferrite, and a remainder being martensite. The martensite is fresh martensite and self-tempered martensite.
-
公开(公告)号：US20180202017A1
公开(公告)日：2018-07-19
申请号：US15741290
申请日：2016-06-10
Applicant: ArcelorMittal
Inventor： Pascal Drillet , Maria Poirier , Sujay Sarkar
IPC: C21D9/46 , C22C38/38 , C22C38/32 , C22C38/28 , C22C38/26 , C22C38/22 , C22C38/06 , C22C38/02 , C22C38/00 , C21D8/02 , C21D6/00 , C23C2/12 , B32B15/01 , B23K26/21 , B21B1/22 , B21D22/02
Abstract: A press hardened steel part is provided. The steel of the part has a chemical composition including, in weight: 0.062%≤C≤0.095%, 1.4%≤Mn≤1.9%, 0.2%≤Si≤0.5%, 0.020%≤Al≤0.070%, 0.02%≤Cr≤0.1%, wherein: 1.5%≤(C+Mn+Si+Cr)≤2.7%, 0.040%≤Nb≤0.060%, 3.4×N≤Ti≤8×N wherein: 0.044%≤(Nb+Ti)≤0.090%, 0.0005≤B≤0.004%, 0.001%≤N≤0.009%, 0.0005%≤S≤0.003%, 0.001%≤P≤0.020%, optionally: 0.0001%≤Ca≤0.003%, and the remainder being Fe and unavoidable impurities. The microstructure of the part includes, in a majority of the part, in surface fractions: less than 40% of bainite, less than 5% of austenite, less than 5% of ferrite, and a remainder being martensite. The martensite is fresh martensite and self-tempered martensite.
-
公开(公告)号：US12269533B2
公开(公告)日：2025-04-08
申请号：US18450472
申请日：2023-08-16
Applicant: ArcelorMittal
Inventor： Cristian Alvarez , Thierry Lizon , Maria Poirier
IPC: B23K26/60 , B21D22/02 , B23K26/00 , B23K26/24 , B23K33/00 , B23K35/24 , B23K35/38 , B62D21/15 , B62D27/02 , C21D6/00 , C21D9/50 , C22C19/05 , C22C30/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/38 , B23K101/00 , B23K101/18
Abstract: A method for producing a welded blank (1) includes providing two precoated sheets (2), butt welding the precoated sheets (2) using a filler wire. The precoating (5) entirely covers at least one face (4) of each sheet (2) at the time of butt welding. The filler wire (20) has a carbon content between 0.01 wt. % and 0.45 wt. %. The composition of the filler wire (20) and the proportion of filler wire (20) added to the weld pool is chosen such that the weld joint (22) has (a) a quenching factor FTWJ: FTWJ−0.9FTBM≥0, where FTBM is a quenching factor of the least hardenable substrate (3), and FTWJ and FTBM are determined: FT=128+1553×C+55×Mn+267×Si+49×Ni+5×Cr−79×Al−2×Ni2−1532×C2−5×Mn2−127×Si2−40×C×Ni−4×Ni×Mn, and (b) a carbon content CWJ 5000, where FA=10291+4384.1×Mo+3676.9Si−522.64×Al−2221.2×Cr−118.11×Ni−1565.1×C−246.67×Mn.
-
Patent Agency Ranking
公开(公告)号：US11814696B2
公开(公告)日：2023-11-14
申请号：US17491785
申请日：2021-10-01
Applicant: ArcelorMittal
Inventor： Pascal Drillet , Maria Poirier , Sujay Sarkar
IPC: C21D9/46 , B32B15/01 , C22C38/00 , C22C38/02 , C22C38/06 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/38 , B21D22/02 , C21D1/673 , C21D8/02 , C22C38/46 , C22C38/44 , C22C38/50 , C22C38/54 , C22C38/48 , C22C21/02 , B23K26/02 , B21B1/22 , C21D6/00 , C22C38/22 , C23C2/12
CPC classification number: C21D9/46 , B21B1/22 , B21D22/022 , B23K26/02 , B32B15/012 , C21D1/673 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0278 , C22C21/02 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/06 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/38 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , C23C2/12 , B21B2001/225 , B32B2605/00 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008
Abstract: A press hardened steel part is provided. The steel of the part has a chemical composition including, in weight: 0.062%≤C≤0.095%, 1.4%≤Mn≤1.9%, 0.2%≤Si≤0.5%, 0.020%≤Al≤0.070%, 0.02%≤Cr≤0.1%, wherein: 1.5%≤(C+Mn+Si+Cr)≤2.7%, 0.040%≤Nb≤0.060%, 3.4×N≤Ti≤8×N wherein: 0.044%≤(Nb+Ti)≤0.090%, 0.0005≤B≤0.004%, 0.001%≤N≤0.009%, 0.0005%≤S≤0.003%, 0.001%≤P≤0.020%, optionally: 0.0001%≤Ca≤0.003%, and the remainder being Fe and unavoidable impurities. The microstructure of the part includes, in a majority of the part, in surface fractions: less than 40% of bainite, less than 5% of austenite, less than 5% of ferrite, and a remainder being martensite. The martensite is fresh martensite and self-tempered martensite.
-
公开(公告)号：US11319610B2
公开(公告)日：2022-05-03
申请号：US15741290
申请日：2016-06-10
Applicant: ArcelorMittal
Inventor： Pascal Drillet , Maria Poirier , Sujay Sarkar
IPC: C21D9/46 , B32B15/01 , C22C38/00 , C22C38/02 , C22C38/06 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/38 , B21D22/02 , C21D1/673 , C21D8/02 , C22C38/46 , C22C38/44 , C22C38/50 , C22C38/54 , C22C38/48 , C22C21/02 , B23K26/21 , B21B1/22 , C21D6/00 , C22C38/22 , C23C2/12
Abstract: A process for manufacturing a press hardened steel part is provided. The steel of the part has a chemical composition including, in weight: 0.062%≤C≤0.095%, 1.4%≤Mn≤1.9%, 0.2%≤Si≤0.5%, 0.020%≤Al≤0.070%, 0.02%≤Cr≤0.1%, wherein: 1.5%≤(C+Mn+Si+Cr)≤2.7%, 0.040%≤Nb≤0.060%, 3.4×N≤Ti≤8×N wherein: 0.044%≤(Nb+Ti)≤0.090%, 0.0005≤B≤0.004%, 0.001%≤N≤0.009%, 0.0005%≤S≤0.003%, 0.001%≤P≤0.020%, optionally: 0.0001%≤Ca≤0.003%, and the remainder being Fe and unavoidable impurities. The process includes hot forming the heated blank in the forming press so as to obtain a formed part and cooling the formed part at a cooling rate CR1 between 40 and 360°C/s in a temperature range from 750 to 450°C. and at a cooling rate CR2 between 15 to 150°C/s in a temperature range from 450°C to 250°C. wherein CR2
-
公开(公告)号：US11945503B2
公开(公告)日：2024-04-02
申请号：US16766725
申请日：2018-11-26
Applicant: ArcelorMittal
Inventor： Cristian Alvarez , Thierry Lizon , Maria Poirier
IPC: B23K26/60 , B21D22/02 , B23K26/00 , B23K26/24 , B23K33/00 , B23K35/24 , B23K35/38 , B62D21/15 , B62D27/02 , C21D6/00 , C21D9/50 , C22C19/05 , C22C30/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/38 , B23K101/00 , B23K101/18
CPC classification number: B62D21/15 , B21D22/022 , B23K26/0006 , B23K26/24 , B23K26/60 , B23K33/00 , B23K35/24 , B23K35/383 , B62D27/02 , C21D6/002 , C21D6/005 , C21D6/008 , C21D9/505 , C22C19/057 , C22C30/02 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/38 , B23K2101/006 , B23K2101/185
Abstract: A method for producing a welded blank (1) includes providing two precoated sheets (2), butt welding the precoated sheets (2) using a filler wire. The precoating (5) entirely covers at least one face (4) of each sheet (2) at the time of butt welding. The filler wire (20) has a carbon content between 0.01 wt. % and 0.45 wt. %. The composition of the filler wire (20) and the proportion of filler wire (20) added to the weld pool is chosen such that the weld joint (22) has (a) a quenching factor FTWJ: FTWJ−0.9FTBM≥0, where FTBM is a quenching factor of the least hardenable substrate (3), and FTWJ and FTBM are determined: FT=128+1553×C+55×Mn+267×Si+49×Ni+5×Cr−79×Al−2×Ni2−1532×C2−5×Mn2−127×Si2−40×C×Ni−4×Ni×Mn, and (b) a carbon content CWJ 5000, where FA=10291+4384.1×Mo+3676.9Si−522.64×Al−2221.2×Cr−118.11×Ni−1565.1×C−246.67×Mn.
-
公开(公告)号：US11911847B2
公开(公告)日：2024-02-27
申请号：US16976392
申请日：2019-02-26
Applicant: ArcelorMittal
Inventor： Francis Schmit , Maria Poirier , Sadok Gaied
IPC: B23K26/322 , B23K26/323 , B23K26/12 , B23K26/32 , C21D9/50 , C21D9/46 , C21D1/673 , C21D1/18 , B23K35/30 , C22C38/00 , C22C38/02 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/50 , C22C38/54 , C22C38/58 , B62B3/02 , B62B3/10 , B62B3/12 , B23K101/18 , B23K103/04 , B23K101/00 , B23K26/24 , C22C38/48
CPC classification number: B23K26/322 , B23K26/123 , B23K26/32 , B23K26/323 , B23K35/3073 , B62B3/02 , B62B3/106 , B62B3/12 , C21D1/185 , C21D1/673 , C21D9/46 , C21D9/50 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/50 , C22C38/54 , C22C38/58 , B23K26/24 , B23K2101/006 , B23K2101/185 , B23K2103/04 , B62B2202/22 , B62B2205/30 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/48
Abstract: A method for producing a part includes providing a first and a second precoated sheet (1,2), butt welding the first and second precoated sheets (1) to obtain a blank (15), and heating the blank (15) to a heat treatment temperature at least 10° C. lower than the full austenitization temperature of the weld joint (22) and at least 15° C. higher than a minimum temperature Tmin:
T
min
(
°
C
.
)
=
AC
3
(
WJ
)
-
α
IC
max
100
(
Ac
3
(
WJ
)
-
673
-
40
×
Al
)
.
where
Ac3(WJ) is the full austenitization temperature of the weld joint (22)
α
IC
max
=
(
1
-
(
1
+
ρ
)
(
max
(
1
;
ρ
)
Ts
2
-
350
)
(
1
-
β
)
(
ρ
Ts
2
+
Ts
1
)
+
β
(
1
+
ρ
)
(
3130
C
FW
+
750
)
-
350
×
(
1
+
ρ
)
)
×
100
,
where
TS1 and TS2 are the ultimate tensile strengths of the strongest and the weakest substrate after press-hardening
CFW is the carbon content of the filler material
β is the proportion of filler material
ρ is the ratio between the thicknesses of the weakest and the strongest substrate
The method also includes holding the blank (15) at the heat treatment temperature for a time between 2 and 10 minutes; and press-forming the blank (15) into a part and cooling.-
公开(公告)号：US20240035109A1
公开(公告)日：2024-02-01
申请号：US18377943
申请日：2023-10-09
Applicant: ArcelorMittal
Inventor： Pascal Drillet , Maria Poirier , Sujay Sarkar
IPC: C21D9/46 , B32B15/01 , C22C38/00 , C22C38/02 , C22C38/06 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/38 , B21D22/02 , C21D1/673 , C21D8/02 , C22C38/46 , C22C38/44 , C22C38/50 , C22C38/54 , C22C38/48 , C22C21/02 , B23K26/21 , B21B1/22 , C21D6/00 , C22C38/22 , C23C2/12
CPC classification number: C21D9/46 , B32B15/012 , C22C38/001 , C22C38/02 , C22C38/06 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/38 , B21D22/022 , C21D1/673 , C21D8/0278 , C22C38/46 , C22C38/44 , C22C38/50 , C22C38/54 , C22C38/48 , C22C21/02 , B23K26/21 , B21B1/22 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C22C38/002 , C22C38/22 , C23C2/12 , B21B2001/225 , B32B2605/00 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008
Abstract: A process for manufacturing a press hardened laser welded steel part, includes providing at least one first steel sheet with a composition containing, by weight 0.062≤C≤0.095%, the at least one first steel sheet precoated with a metallic precoating of aluminum, or aluminum-based alloy, or aluminum alloy.
providing at least one second steel sheet with a composition containing, by weight, from to 0.38% of carbon, the at least one second steel sheet precoated with a metallic precoating of aluminum, or aluminum-based alloy, or aluminum alloy;
removing a portion of a thickness of the aluminum precoating at upper and lower sides along one side of a periphery of the at least one first steel sheet and the at least one second steel sheet;
creating a welded blank by laser welding the at least one first steel sheet and the at least one second steel sheet, such that an aluminum content in a weld metal is lower than 0.3% by weight, the laser welding being performed along the periphery wherein the portion of the thickness of the aluminum precoating has been removed;
heating the welded blank and holding the welded blank at a temperature Tm between 890 and 950° C., a holding duration Dm at the temperature being between 1 and 10 minutes, so as to obtain a heated welded blank;
transferring the heated welded blank within a forming press, the transfer duration Dt being less than 10 s;
hot forming the heated welded blank in the forming press so as to obtain a welded formed part; and
cooling the welded formed part at a first cooling rate CR1 between 40 and 360° C./s in a temperature range between 750 and 450° C., and at a second cooling rate CR2 between 15 to 150° C./s in a temperature range between 450° C. and 250° C., wherein CR2
-
-
-
-
-
-
-
Search Results
8
records
(took 0.01 seconds)
