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公开(公告)号：US20210053154A1
公开(公告)日：2021-02-25
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 , C22C38/58 , C22C38/50 , C22C38/06 , C22C38/02 , C22C38/00 , C22C38/54 , C22C38/42 , C22C38/44 , B23K35/30
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 T 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.
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公开(公告)号：US20230399051A1
公开(公告)日：2023-12-14
申请号：US18450472
申请日：2023-08-16
Applicant: ArcelorMittal
Inventor： Cristian ALVAREZ , Thierry LIZON , Maria POIRIER
IPC: B62D21/15 , B23K26/60 , B21D22/02 , B23K26/00 , B23K26/24 , B23K33/00 , B23K35/24 , B23K35/38 , 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
CPC classification number: B62D21/15 , B23K26/60 , B21D22/022 , B23K26/0006 , B23K26/24 , 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 , B23K2101/185
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.
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3.发明公开公开(公告)号：US20240227080A1
公开(公告)日：2024-07-11
申请号：US18417759
申请日：2024-01-19
Applicant: ArcelorMittal
Inventor： Francis SCHMIT , Maria POIRIER , Sadok GAIED
IPC: B23K26/322 , B23K26/12 , B23K26/32 , B23K26/323 , B23K35/30 , B62B3/02 , B62B3/10 , B62B3/12 , C21D1/18 , C21D1/673 , C21D9/46 , C21D9/50 , C22C38/00 , C22C38/02 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/50 , C22C38/54 , C22C38/58 , B23K26/24 , B23K101/00 , B23K101/18 , B23K103/04 , 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
1
0
0
(
Ac
3
(
W
J
)
-
6
7
3
-
40
×
Al
)
.
where
Ac3(WJ) is the full austenitization temperature of the weld joint (22)
α
IC
max
=
(
1
-
(
1
+
ρ
)
(
max
(
1
;
ρ
)
T
s
2
-
3
5
0
)
(
1
-
β
)
(
ρ
T
s
2
+
T
s
1
)
+
β
(
1
+
ρ
)
(
3
1
3
0
C
F
W
+
750
)
-
3
5
0
×
(
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：US20220072658A1
公开(公告)日：2022-03-10
申请号：US17417265
申请日：2018-12-24
Applicant: ArcelorMittal
Inventor： Francis SCHMIT , Maria POIRIER , Cristian ALVAREZ , Lucille GOUTON , Thierry DAVID , Ivan VIAUX
IPC: B23K26/26 , B23K26/322
Abstract: A method for producing a welded steel blank (1) includes providing two precoated sheets (2), each comprising a steel substrate (3) having a precoating (5) on each of its two main faces (4), each sheet (2) comprising, on each main face (4), at a weld edge (14), a removal zone (18) in which the precoating (5) is removed over a removal fraction; and butt welding the sheets (2) using a filler wire (20) so as to create a weld joint (22) having an aluminum content AlWJ comprised between 0.1 wt. % and 1.2 wt. %. The composition of the wire (20) and the proportion of wire (20) added is such that the weld joint (22) has: (a) a quenching factor FTWJ such that FTWJ−0.96FTBM≥0, (b) a nickel content NiWJ≤14−3.4×AlWJ and a chromium content CrWJ≤5−2×AlWJ, where AlWJ is the aluminum content of the weld joint (22).
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