摘要:
wherein the steel sheet has a precipitation strengthened and substantially single-phase ferritic microstructure, wherein the volume fraction of the ferrite phase in said microstructure is not lower than 97%, and wherein the precipitates in the microstructure comprise fine precipitates of composite carbides containing Mo and V and optionally Nb.
摘要:
The invention relates to a steel strip having a hot dip zinc based coating, the steel strip having the following composition, in weight%,: C: 0.17 - 0.24 Mn:. 1.8 - 2.5 Si: 0.65 - 1.25 Al: ≤ 0.3 optionally: Nb: ≤ 0.1 and/or V: ≤ 0.3 and/or Ti: ≤ 0.15 and/or Cr: ≤ 0.5 and/or Mo: ≤ 0.3, the remainder being iron and unavoidable impurities, with a Si/Mn ratio ≤ 0.5 and a Si/C ratio ≥ 3.0, with an Mn equivalent ME of at most 3.5, wherein ME = Mn + Cr + 2 Mo (in wt.%) having a microstructure with (in vol.%): ferrite: 0 - 40 bainite: 20 - 70 martensite: 7 - 30 retained austenite: 5 - 20 pearlite: ≤ 2 cementite: ≤ 1 having a tensile strength in the range of 960 - 1100 MPa, a yield strength of at least 500 MPa, and a uniform elongation of at least 12%.
摘要:
The invention relates to a method for hot forming a part, wherein the hot forming is performed starting with a metal coated steel blank, which is heated to a temperature between the Ac3-temperatur of the steel and 1000° C in a furnace, after which the heated blank is transported to a hot forming press, and the heated blank is pressed in the hot forming press to form a part. According to the invention, the steel has the following composition in weight%: C: 0.10 - 0.25, Mn: 1.6 - 2.6, Si:
摘要:
Cold rolled and continuously annealed high strength steel strip including (in wt %): 0.04-0.30% C, 1.0-3.5% Mn, 0-1.0% Si, 0-2.0% Al, 0-1.0% Cr, 0-0.02% P, 0-0.01% S, 0-0.25% V, 0-0.1% Nb, 0-0.20% Ti, 0-0.015% N, 0-0.010% B, unavoidable impurities, balance iron, provided with a hot dip galvanized or galvannealed zinc alloy coating layer, wherein the zinc alloy is 0.3-4.0% Mg and 0.05-6.0% Al; optionally at most 0.2% of one or more additional elements; unavoidable impurities; the remainder being zinc, and method for producing it.
摘要:
A high strength hot dip galvanized steel strip including, in mass percent, of the following elements: 0.10-0.18% C, 1.90-2.50% Mn, 0.30-0.50% Si, 0.50-0.70% Al, 0.10-0.50% Cr, 0.001-0.10% P, 0.01-0.05% Nb, max 0.004% Ca, max 0.05% S, max 0.007% N, and optionally at least one of the following elements: 0.005-0.50% Ti, 0.005-0.50% V, 0.005-0.50% Mo, 0.005-0.50% Ni, 0.005-0.50% Cu, max 0.005% B, the balance Fe and inevitable impurities, wherein 0.80% 2.10%. This steel offers improved formability at a high strength, has a good weldability and surface quality together with a good produce-ability and coat-ability.
摘要:
The invention relates to a steel strip having a hot dip zinc based coating, the steel strip having the following composition, in weight%,: C: 0.17 - 0.24 Mn:. 1.8 - 2.5 Si: 0.65 - 1.25 Al: ≤ 0.3 optionally: Nb: ≤ 0.1 and/or V: ≤ 0.3 and/or Ti: ≤ 0.15 and/or Cr: ≤ 0.5 and/or Mo: ≤ 0.3, the remainder being iron and unavoidable impurities, with a Si/Mn ratio ≤ 0.5 and a Si/C ratio ≥ 3.0, with an Mn equivalent ME of at most 3.5, wherein ME = Mn + Cr + 2 Mo (in wt.%) having a microstructure with (in vol.%): ferrite: 0 - 40 bainite: 20 - 70 martensite: 7 - 30 retained austenite: 5 - 20 pearlite: ≤ 2 cementite: ≤ 1 having a tensile strength in the range of 960 - 1100 MPa, a yield strength of at least 500 MPa, and a uniform elongation of at least 12%.
摘要:
wherein the steel sheet has a precipitation strengthened and substantially single-phase ferritic microstructure, wherein the volume fraction of the ferrite phase in said microstructure is not lower than 97%, and wherein the precipitates in the microstructure comprise fine precipitates of composite carbides containing Mo and V and optionally Nb.
摘要:
A high strength hot dip galvanized steel strip including, in mass percent, of the following elements: 0.10-0.18% C, 1.90-2.50% Mn, 0.30-0.50% Si, 0.50-0.70% Al, 0.10-0.50% Cr, 0.001-0.10% P, 0.01-0.05% Nb, max 0.004% Ca, max 0.05% S, max 0.007% N, and optionally at least one of the following elements: 0.005-0.50% Ti, 0.005-0.50% V, 0.005-0.50% Mo, 0.005-0.50% Ni, 0.005-0.50% Cu, max 0.005% B, the balance Fe and inevitable impurities, wherein 0.80% 2.10%. This steel offers improved formability at a high strength, has a good weldability and surface quality together with a good produce-ability and coat-ability.