High strength hot-dip galvanized or galvannealed steel sheet...

C - Chemistry – Metallurgy – 22 – C

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C22C 38/06 (2006.01) C21D 9/46 (2006.01) C22C 38/00 (2006.01) C22C 38/02 (2006.01) C22C 38/04 (2006.01) C22C 38/60 (2006.01) C23C 2/06 (2006.01)

Patent

CA 2433626

Disclosed are a high strength hot-dip galvanized or galvannealedsteel sheet, which has improvedpressformability and plating adhesion and is useful as a member for automobile, building, electric or other members, and a process for producing the same. This high strength hot-dip galvanized or galvannealed steel sheet comprises: (a) a steel sheet substrate comprising, by weight, carbon (C): 0.05 to 0.2%, silicon (Si) : 0.2 to 2.0%, manganese (Mn) : 0.2 to 2.5%, and aluminum (Al) : 0.01 to 1.5%, the silicon and the aluminum having a mutual relationship represented by formula 0.4 (%) <=Si + 0.8A1 (%) <= 2.0 (%), the steel sheet substrate further comprising at least one member selected from the group consisting of (i) 0.003 to 1.0% of tin (Sn), (ii) 0.005 to 1.0% in total of at least one member selected from antimony (Sb) , bismuth (Bi ), and selenium (Se), (iii) 0.005 to 1.0% in total of at least one member selected from beryllium (Be), magnesium (Mg), calcium (Ca) , and zirconium (Zr) , and (iv) 0.005 to 1.0% in total of at least one member selected from scandium (Sc), yttrium (Y) , lanthanum (La) , and cerium (Ce) , with the balance consisting of iron (Fe) and unavoidable impurities, the volume fraction of retained austenite in the steel structure being 2 to 20%; and (b) a zinc (Zn) coating layer provided on said steel sheet substrate.

L'invention concerne une plaque d'acier à placage en zinc moulé à haute résistance parfaitement adaptée au formage à la presse et à l'adhésion en dépôt, utile en tant qu'éléments d'automobile, de construction, électriques, notamment. La plaque en acier plaquée comporte (a) une base de plaque en acier qui contient de 0,05 à 0,2 % en poids de carbone, de 0,2 à 2,0 % en poids de silicium, de 0,2 à 2,5 % en poids de manganèse et de 0,01 à 1,5 % en poids d'aluminium, le silicium et l'aluminium satisfaisant à la relation 0,4 (%) </= Si+8Al (%) </= 2,0 %, et contient au moins un élément choisi dans le groupe renfermant (i) 0,003 à 1,0 % en poids d'étain, (ii) au moins un d'antimoine, de bismuth et de sélénium en une dose totale de 0,005 à 1,0 % en poids, (iii) au moins un de béryllium, de magnésium, de calcium et de zirconium en une dose totale de 0,005 à 1,0 % en poids, et (iv) au moins un de scandium, d'yttrium, de lanthane et de cérium en dose totale de 0,005- 1,0 % en poids, le restant étant constitué de fer et d'impuretés inévitables, et la teneur en austénite résiduelle dans la structure en acier étant de 2 à 20 % en volume; et (b) une couche de dépôt de zinc formée sur la base de la plaque en acier.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

High strength hot-dip galvanized or galvannealed steel sheet... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High strength hot-dip galvanized or galvannealed steel sheet..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High strength hot-dip galvanized or galvannealed steel sheet... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1901131

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.