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1. (WO2019028157) MANUFACTURING ULTRA-HIGH STRENGTH LOAD BEARING PARTS USING HIGH STRENGTH/LOW INITIAL YIELD STEELS THROUGH TUBULAR HYDROFORMING PROCESS
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Pub. No.: WO/2019/028157 International Application No.: PCT/US2018/044841
Publication Date: 07.02.2019 International Filing Date: 01.08.2018
IPC:
B21D 26/033 (2011.01) ,B21D 26/053 (2011.01) ,C21D 7/10 (2006.01) ,B21D 53/88 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
D
WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING
26
Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces
02
by applying fluid pressure
033
Deforming tubular bodies
B PERFORMING OPERATIONS; TRANSPORTING
21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
D
WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING
26
Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces
02
by applying fluid pressure
053
characterised by the material of the blanks
C CHEMISTRY; METALLURGY
21
METALLURGY OF IRON
D
MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
7
Modifying the physical properties of iron or steel by deformation
02
by cold working
10
of the whole cross-section, e.g. of concrete reinforcing bars
B PERFORMING OPERATIONS; TRANSPORTING
21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
D
WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING
53
Making other particular articles
88
other parts for vehicles, e.g. cowlings, mudguards
Applicants:
AK STEEL PROPERTIES, INC. [US/US]; 9227 Centre Pointe Drive West Chester, OH 45069, US
Inventors:
PU, Chao; US
JIA, Yueqian; US
ZHU, Feng; CA
WANG, Yu-Wei; US
Agent:
SCHOEN, Ann, G.; US
TERSMETTE, Colleen, M.; US
GOLDSTEIN, Steven, J.; US
ACHESON JR., Edwin, R.; US
CONLEY, Scott, R.; US
Priority Data:
62/539,91101.08.2017US
Title (EN) MANUFACTURING ULTRA-HIGH STRENGTH LOAD BEARING PARTS USING HIGH STRENGTH/LOW INITIAL YIELD STEELS THROUGH TUBULAR HYDROFORMING PROCESS
(FR) FABRICATION DE PIÈCES PORTEUSES À RÉSISTANCE ULTRA-ÉLEVÉE À L'AIDE D'ACIERS À RÉSISTANCE ÉLEVÉE/FAIBLE RENDEMENT INITIAL PAR LE BIAIS D'UN PROCESSUS D'HYDROFORMAGE TUBULAIRE
Abstract:
(EN) Rather than using a conventional stamping forming process with steels having high ultimate tensile strength and relatively low initial yield, tubular hydroforming techniques are introduced to synergize with BIW part forming, or forming of other load bearing parts. Such steels can have ultimate tensile strengths of greater than 1000 MPa and initial yields of less than 360 MPa In some embodiments, the steels have elongation of at least 40%. Such steels can include retained austenite.
(FR) Au lieu d'utiliser un procédé de formage par estampage classique avec des aciers ayant une résistance ultime à la traction élevée et un rendement initial relativement faible, des techniques d'hydroformage tubulaire sont introduites pour être mises en synergie avec le formage d'une pièce BIW, ou le formage d'autres pièces porteuses. De tels aciers peuvent présenter des résistances ultimes à la traction supérieures à 1000 MPa et des rendements initiaux inférieurs à 360 MPa.Selon certains modes de réalisation, les aciers présentent un allongement d'au moins 40 %.De tels aciers peuvent comprendre de l'austénite résiduelle.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)