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OwnerSebastian COBO, Christian ALLELY +3inventors
InventorsSebastian COBO, Christian ALLELY, Martin BEAUVAIS, Anis AOUAFI, Emmanuel LUCAS
Estimating the term…
A press hardened steel part having a chemical composition, with contents being expressed by weight, including: either 0.24%≤C≤0.38% and 0.40%≤Mn≤3%, or 0.38%<C≤0.43% and 0.05%≤Mn<0.4%, 0.10%≤Si≤1.70%, 0.015%≤Al≤0.070%, 0%≤Cr≤2%, 0.25%≤Ni≤2%, 0.015%≤Ti≤0.10%, 0%≤Nb≤0.060%, 0.0005%≤B≤0.0040%, 0.003%≤N≤0.010%, 0.0001%≤S≤0.005%, 0.0001%≤P≤0.025%, the titanium and nitrogen contents satisfying: Ti/N>3.42, a remainder being iron and unavoidable impurities resulting from the processing, the press hardened part having a martensitic or martensitic-bainitic structure, a mechanical strength Rm greater than or equal to 1800 MPa, and the surface density of all the particles Di and the surface density of the particles larger than 2 micrometers D(>2 μm) satisfy, at least to a depth of 100 micrometers in the vicinity of the surface of said press hardened part: Di+6.75 D(>2 μm)<270.
A press hardened steel part comprising:
A press hardened steel part comprising:
Dependencies are inferred from the claim text.