Abstract:
A method for the fabrication of a coated sheet is provided. The method includes the steps of providing a sheet in a deposition chamber, maintaining the deposition chamber at a pressure Pchamber, maintaining an ejection chamber that is located inside the deposition chamber at a pressure Peject and coating the sheet with zinc with a sonic vapor jet. A ratio of the pressures Pchamber to Peject is between 2·10−3 and 5.5·10−2.
Abstract:
A steel sheet is provided with a coating. The coating includes at least one layer of zinc, obtained by a jet vapor deposition method in which a ratio between a pressure inside the deposition chamber Pchamber and a pressure inside the zinc ejection chamber Peject is between 2·10−3 et 5.5·10−2 A method for fabricating the steel sheet is also provided.
Abstract:
A steel sheet is provided with a coating having at least one layer of zinc and a top layer of paint applied by cataphoresis. The zinc layer is deposited by a jet vapor deposition process in a deposition chamber maintained at a pressure between 6·10−2 mbar and 2·10−1 mbar. A fabrication method is also provided.
Abstract:
A steel sheet is provided with a coating having at least one layer of zinc and a top layer of paint applied by cataphoresis. The zinc layer is deposited by a jet vapor deposition process in a deposition chamber maintained at a pressure between 6·10−2 mbar and 2·10−1 mbar. A fabrication method is also provided.
Abstract:
The present invention provides a spot welded joint of at least two steel sheets. At least one of the steel sheets presents yield strength above or equal to 600 MPa, an ultimate tensile strength above or equal to 1000 MPa, uniform elongation above or equal to 15%. The base metal chemical composition includes 0.05≦C≦0.21%, 4.0≦Mn≦7.0%, 0.5≦Al≦3.5%, Si≦2.0%, Ti≦0.2%, V≦0.2%, Nb≦0.2%, P≦0.025%, B≦0.0035%, and the spot welded joint contains a molten zone microstructure containing more than 0.5% of Al and containing a surface fraction of segregated areas lower than 1%, said segregated areas being zones larger than 20 μm2 and containing more than the steel nominal phosphorus content.
Abstract:
The invention relates to the manufacture of a cold-rolled steel sheet having a strength of more than 900 MPa, an elastic limit of more than 700 MPa and distributed elongation of more than 12%, the composition of which includes, the contents being expressed as weight percentages: 0.26%≦C≦0.45%, 1.0%≦Mn≦3.0%, 1.0%≦Si≦3.0%, Al≦0.10%, 0%≦Cr≦1.5% %, S≦0.005%, P≦0.020%, Nb≦0.1%, Ti≦0.020%, V≦0.015%, N≦0.01%, the remainder of the composition being iron and inevitable impurities resulting from the production process. The microstructure, given in surface proportions, comprises 13% to 25% residual austenite and 13% to 30% MA islands, the remainder consisting of bainite and possibly ferrite.
Abstract:
A method for the fabrication of a coated sheet is provided. The method includes the steps of providing a sheet in a deposition chamber, maintaining the deposition chamber at a pressure Pchamber, maintaining an ejection chamber that is located inside the deposition chamber at a pressure Peject and coating the sheet with zinc with a sonic vapor jet. A ratio of the pressures Pchamber to Peject is between 2·10−3 and 5.5·10−2.