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1. 发明申请

WO2023285934A1 METHOD TO CLASSIFY, DESIGN AND MANUFACTURE A METALLIC PART 审中-公开
公开(公告)号：WO2023285934A1
公开(公告)日：2023-01-19
申请号：PCT/IB2022/056322
申请日：2022-07-08
申请人： ARCELORMITTAL
发明人： SCHNEIDER, Nicolas , BLAISE, Alexandre , GIBEAU, Elie
IPC分类号： G06F30/20 , B21B37/28 , G06F30/27 , B21B27/02 , B21D5/08 , G06F113/24 , G06F119/18
摘要： The current invention provides for a computerized method to determine the aptitude of a metallic part to be manufactured by roll forming and to classify metallic parts into one of the following categories: roll-formable without modification, roll- formable with modifications, not roll-form able. It also provides for a computerized method to compute the roll forming direction of a part. It further provides a method for determining the aptitude to roll forming of a large set of parts, such as for example part of the set of parts making up an automotive vehicle. The purpose of the current invention is further to provide a manufacturing method for a metallic part.

2. 发明申请

WO2018115951A1 A MANUFACTURING PROCESS OF HOT PRESS FORMED ALUMINIZED STEEL PARTS 审中-公开
公开(公告)号：WO2018115951A1
公开(公告)日：2018-06-28
申请号：PCT/IB2017/001531
申请日：2017-12-08
申请人： ARCELORMITTAL
发明人： BLAISE, Alexandre
IPC分类号： C21D8/04 , C21D9/46 , C21D9/48 , F27B9/24 , F27B9/36
摘要： A manufacturing process of a press hardened coated part comprising providing a furnace comprising N zones, each furnace zone being respectively heated at a setting temperature Θ 1F , Θ 2F , Θ iF ,..., Θ NF , implementing the following successive steps: providing a steel sheet with thickness th comprised between 0,5 and 5mm, comprising a steel substrate covered by an aluminium alloy precoating with a thickness comprised between 15 and 50μm, the emissivity coefficient being equal to 0.15(1 + a), a being comprised between 0 and 2.4, then cutting said steel sheet to obtain a precoated steel blank, then placing the precoated steel blank in furnace zone 1 for a duration ti comprised between 5 and 600s, wherein Θ iF and t 1 are such that: Θ 1Fmax > Θ 1F > Θ 1Fmin with: Θ 1Fmax =(598+ A e Bt1 + Ce Dt1 ) and Θ 1Fmin = (550+ A' e B't1 + C'e D't1 ), A, B, C, D, A', B', C, D' being such that A= (762 e 0.071 th - 426 e- 0.86 th ) (1-0.345α), B= (-0.031 e -2.151 th - 0.039 e -0.094 th ) (1+0.191α), C= (394 e 0.193 th - 434.3 e -1.797 th ) (1-0.364α), D= (-0.029 e -2.677 th - 0.011 e - 0.298 th ) (1 +0.475α), A'= (625 e 0.123 th - 476 e -1.593 th ) (1 -0.345α), B'=(-0.059 e -2.109 th - 0.039 e - 0.091 th ) (1+0.191α), C'= (393 e 0.190 th - 180 e - 1.858 th ) (1-0.364α), D'=(-0.044 e -2.915 th - 0.012 e - 0.324 th ) (1 +0.475a), wherein Θ 1F , Θ 1Fmax Θ 1Fmin are in ° Celsius, t 1 is in s., and th is in mm, then transferring the precoated steel blank in the furnace zone 2 heated at a setting temperature Θ 2F = Θ 1Β and maintaining isothermally the precoated steel blank for a duration t 2 , Θ 2F and t 2 being such that: t 2min ≥ t 2 ≥ t 2max with : t 2min = 0.95 t 2 * and t 2max = 1.05 t 2 *with : t 2 *= t 1 2 ( - 0.0007 th 2 +0.0025 th - 0.0026) + 33952 -(55.52 x Θ 2F ) wherein Θ 2F is in ° Celsius, t 2 , t 2min , t 2max , t 2 * are in s., and th is in mm, then transferring the precoated steel blank in further zones (3,..i,.., N) of the furnace, so to reach a maximum blank temperature Θ MB comprised between 850°C and 950°C, the average heating rate V A of the blank between Θ 2F and Θ ΜΒ being comprised between 5 and 500°C/s, then transferring the heated steel blank from the furnace into a press, then hot forming the heated steel blank in said press so as to obtain part, then cooling the part at a cooling rate in order to obtain a microstructure in the steel substrate comprising at least one constituent chosen among martensite or bainite.

3. 发明申请

WO2019193434A1 A MANUFACTURING PROCESS OF PRESS HARDENED PARTS WITH HIGH PRODUCTIVITY 审中-公开
公开(公告)号：WO2019193434A1
公开(公告)日：2019-10-10
申请号：PCT/IB2019/051764
申请日：2019-03-05
申请人： ARCELORMITTAL
发明人： BLAISE, Alexandre , DRILLET, Pascal , STUREL, Thierry
IPC分类号： C21D9/48 , C23C2/12 , C23C2/28 , C23C2/40 , C23C8/14 , C23C8/80
摘要： A process for manufacturing a non-stamped prealloyed steel coil, sheet or blank, comprising the following successive steps : - providing a non-stamped precoated steel coil, sheet or blank composed of a steel substrate covered by a precoating of aluminum, or aluminum-based alloy, or aluminum alloy, wherein the precoating thickness is comprised between 10 and 35 micrometers on each side of the steel coil, sheet or blank, then - heating the non-stamped steel coil, sheet or blank in a furnace under an atmosphere containing at least 5% oxygen, up to a temperature θ 1 comprised between 750 and 1000°C, for a duration t 1 comprised between t 1min and t 1max , wherein : t 1min = 23500/( θ 1 – 729.5) and t 1max = 4.946 x 10 41 x θ 1 - 13.08 , t 1 designating the total duration in the furnace, θ 1 being expressed in °C and t 1min and t 1max being expressed in seconds, then - cooling the non-stamped steel coil, sheet or blank at a cooling rate V r1 down to a temperature θ 1 , then - maintaining the non-stamped steel coil, sheet or blank at a temperature θ 2 comprised between 100 and 500°C, for a duration t 2 comprised between 3 and 45 minutes,.so to obtain a diffusible hydrogen less than 0.35ppm.

4. 发明申请

WO2019171157A1 A MANUFACTURING PROCESS OF PRESS HARDENED PARTS WITH HIGH PRODUCTIVITY 审中-公开
公开(公告)号：WO2019171157A1
公开(公告)日：2019-09-12
申请号：PCT/IB2018/051546
申请日：2018-03-09
申请人： ARCELORMITTAL
发明人： BLAISE, Alexandre , STUREL, Thierry , DRILLET, Pascal
IPC分类号： C21D9/48 , C23C2/12 , C23C2/28 , C23C2/40 , C23C8/14 , C23C8/80
摘要： A process for manufacturing a prealloyed steel coil, sheet or blank, comprising the following successive steps : - providing a precoated steel coil, sheet or blank composed of a steel substrate covered by a precoating of aluminum, or aluminum-based alloy, or aluminum alloy, wherein the precoating thickness is comprised between 10 and 35 micrometers on each side of the steel coil, sheet or blank, then - heating the steel coil, sheet or blank in a furnace under an atmosphere containing at least 5% oxygen, up to a temperature θ 1 comprised between 750 and 1000°C, for a duration t1 comprised between t 1min and t 1max , wherein : t 1min = 23500/( θ 1 – 729.5) and t 1max = 4.946 x 10 41 x θ 1 -13.08 , t 1 designating the total duration in the furnace, θ 1 being expressed in °C and t 1min and t 1max being expressed in seconds, then cooling the steel coil, sheet or blank at a cooling rate V r1 down to a temperature θ i , then maintaining the steel coil, sheet or blank at a temperature θ 2 comprised between 100 and 500°C, for a duration t 2 comprised between 3 and 45 minutes.

5. 发明申请

WO2018115914A1 A MANUFACTURING PROCESS OF HOT PRESS FORMED ALUMINIZED STEEL PARTS 审中-公开
公开(公告)号：WO2018115914A1
公开(公告)日：2018-06-28
申请号：PCT/IB2016/001774
申请日：2016-12-19
申请人： ARCELORMITTAL
发明人： BLAISE, Alexandre
IPC分类号： C21D8/04 , C21D9/46 , C21D9/48 , F27B9/24 , F27B9/36
摘要： A manufacturing process of a press hardened coated part comprising providing a furnace comprising N zones, each furnace zone being respectively heated at a setting temperature ⊖ 1F , ⊖ 2F ,..⊖ iF ,..., ⊖ NF , implementing the following successive steps: providing a steel sheet with thickness th comprised between 0,5 and 5mm, comprising a steel substrate covered by an aluminium alloy precoating with a thickness comprised between 15 and 50µm, the emissivity coefficient being equal to 0.15(1 + α), α being comprised between 0 and 2.4, then cutting said steel sheet to obtain a precoated steel blank, then placing the precoated steel blank in furnace zone 1 for a duration t 1 comprised between 5 and 600s, wherein ⊖ 1F and t 1 are such that: ⊖ 1Fmax > ⊖ 1F > ⊖ 1Fmin with: 0 1Fmax =(598+ A e Bt1 + Ce Dt1 ) and ⊖ 1Fmin = (550+ A' e B't1 + C'e D't1 ), A, B, C, D, A', B', C', D' being such that A= (762 e 0,071 th - 426 e -0.86 th ) (1-0.345aα), B= (-0.031 e -2.151 th - 0.039 e -0.094 th ) (1 +0.191α), C= (394 e 0.193 th - 434.3 e -1.797 th ) (1-0.364α), D= (-0.029 e -2.677 th - 0.011 e -0.298 th ) (1 +0.475α), A'= (625 e 0.123 th - 476 e -1.593 th ) (1 -0.345α), B'=(-0.059 e -2.109 th - 0.039 e -0.091 th ) (1+0.191α), C'= (393 e 0.190 th - 180 e -1.858 th ) (1-0.364α), D'=(-0.044 e -2.915 th - 0.012 e -0.324 th ) (1 +0.475α), wherein ⊖ 1F , ⊖ 1Fmax ⊖ 1Fmin are in ° Celsius, t 1 is in s., and th is in mm, then transferring the precoated steel blank in the furnace zone 2 heated at a setting temperature ⊖ 2F = ⊖ 1Β and maintaining isothermally the precoated steel blank for a duration t 2 , ⊖ 2F and t 2 being such that: t 2min ≥ t 2 > t 2max with : t 2min = 0.95 t 2 * and t 2max = 1.05 t 2 * with : t 2 * = t 1 2 ( - 0.0007 th 2 +0.0025 th - 0.0026) + 33952 -(55.52 x ⊖ 2F ) wherein ⊖ 2F is in ° Celsius, t 2 , t 2min , t 2max , t 2 * are in s., and th is in mm, then transferring the precoated steel blank in further zones (3,..i,.., N) of the furnace, so to reach a maximum blank temperature ⊖ΜΒ comprised between 850°C and 950°C, the average heating rate V A of the blank between ⊖ 2F and ⊖ ΜΒ being comprised between 5 and 500°C/s, then transferring the heated steel blank from the furnace into a press, then hot forming the heated steel blank in said press so as to obtain part, then cooling the part at a cooling rate in order to obtain a microstructure in the steel substrate comprising at least one constituent chosen among martensite or bainite.

6. 发明申请

WO2023089449A1 HOT STAMPING DIE AND HOT STAMPING PROCESS USING A HOT STAMPING PRESS 审中-公开
公开(公告)号：WO2023089449A1
公开(公告)日：2023-05-25
申请号：PCT/IB2022/060739
申请日：2022-11-08
申请人： ARCELORMITTAL
发明人： BLAISE, Alexandre , TALLON, Christophe
IPC分类号： B21D22/02 , B21D22/20 , B21D37/16
摘要： The invention relates to a hot stamping die (2,3) comprising a die body (11) having a work face (9) which is in contact with a blank during the hot stamping operation, and at least one porous die portion (4) having a corresponding porous work face portion (7), said porous die body portion being in contact with a reservoir (6, 40), said reservoir (6, 40) containing a cooling medium (8), and said porous die body portion comprising a plurality of ejection channels (5) extending from said reservoir (6, 40) to said porous work face portion, wherein said ejection channels (5) are configured to eject said cooling medium (8) from the reservoir ( 6, 40) towards said porous work face portion (7) when the pressure on the cooling medium is increased above a threshold ejection pressure, and wherein said die (2,3) does not comprise any discharge channels to evacuate excess ejected coolant from the dies after hot stamping.

7. 发明申请

WO2023089358A1 HOT STAMPING DIE AND HOT STAMPING PROCESS USING A HOT STAMPING PRESS 审中-公开
公开(公告)号：WO2023089358A1
公开(公告)日：2023-05-25
申请号：PCT/IB2021/060686
申请日：2021-11-18
申请人： ARCELORMITTAL
发明人： BLAISE, Alexandre , TALLON, Christophe
IPC分类号： B21D22/02 , B21D22/20 , B21D37/16
摘要： The invention relates to a hot stamping die (2,3) comprising a die body (11) having a work face (9) which is in contact with a blank during the hot stamping operation, and at least one porous die portion (4) having a corresponding porous work face portion (7), said porous die body portion being in contact with a reservoir (6, 40), said reservoir (6, 40) containing a cooling medium (8), and said porous die body portion comprising a plurality of ejection channels (5) extending from said reservoir (6, 40) to said porous work face portion, wherein said ejection channels (5) are configured to eject said cooling medium (8) from the reservoir ( 6, 40) towards said porous work face portion (7) when the pressure on the cooling medium is increased above a threshold ejection pressure, and wherein said die (2,3) does not comprise any discharge channels to evacuate excess ejected coolant from the dies after hot stamping.

8. 发明申请

WO2023285855A1 METHOD TO CLASSIFY BY ROLL FORMABILITY AND MANUFACTURE A METALLIC PART 审中-公开
公开(公告)号：WO2023285855A1
公开(公告)日：2023-01-19
申请号：PCT/IB2021/056234
申请日：2021-07-12
申请人： ARCELORMITTAL
发明人： SCHNEIDER, Nicolas , BLAISE, Alexandre , GIBEAU, Elie
IPC分类号： G06F30/20 , B21B37/28 , G06F30/27 , B21B27/02 , G06F113/24 , G06F119/18
摘要： The current invention provides for a computerized method to determine the aptitude of a metallic part to be manufactured by roll forming and to classify metallic parts into one of the following categories: roll-formable without modification, roll-formable with modifications, not roll-formable. It also provides for a computerized method to compute the roll forming direction of a part. It further provides a method for determining the aptitude to roll forming of a large set of parts, such as for example part of the set of parts making up an automotive vehicle. The purpose of the current invention is further to provide a manufacturing method for a metallic part.

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