Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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B21B
ROLLING OF METAL
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1/00
Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
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B21B1/02
for rolling heavy work, e.g. ingots, slabs,; blooms, or; billets, in which the cross-sectional form is unimportant; ; Rolling combined with forging or pressing
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B21B1/06
in a non-continuous process; , e.g. triplet mill, reversing mill
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B21B1/06

METHOD FOR PARTIAL COLD DEFORMATION OF STEEL WITH HOMOGENEOUS THICKNESS
20210189518 · 2021-06-24 ·

The invention relates to a method for partial hardening of a steel sheet by cold deformation, where the partial hardening of a steel is done by a cold deformation with a multi-step rolling and annealing process and in order to have a steel sheet with a homogeneous thickness steel sheet is used with at least two areas having different values in mechanical and/or physical properties in longitudinal direction of the material.