Spring element made from a ferritic chromium steel
AssigneeStahlwerk Ergste Westig GmbH
InventorsOskar Pacher, Gisbert Kloss-Ulitzka, Victor Castro
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Abstract
Spring element, in particular spring rail for wipers, in particular of motor vehicles, with a low tendency to vibrate or a high attenuation, made from a ferritic chromium steel comprising 0.03 to 0.12% of carbon, 0.2 to 0.9% of silicon, 0.3 to 1% of manganese, 13 to 20% of chromium, 0.1 to 2.0% of molybdenum, 0.05 to 1.0% of copper, 0.02 to 0.05% of nitrogen, less than 0.01% of titanium, 0.01 to 0.10% of niobium and 0.02 to 0.25% of vanadium, remainder iron.
Claims10
A wiper blade for a wiper, comprising a spring element connected to a wiper arm and made from a ferritic chromium steel, comprising, by weight percent,
- 0.03 to 0.12% of carbon
- 0.2 to 0.9% of silicon
- 0.3 to 1% of manganese
- 13 to 20% of chromium
- less than 0.5% of nickel
- 0.1 to 2 of molybdenum
- 0.05 to 1.0% of copper
- 0.02 to 0.5% of nitrogen
- less than 0.01% of titanium
- 0.01 to 0.10% of niobium
- 0.02 to 0.25% of vanadium, remainder iron, said spring element comprising a coercive force ranging from 190 to 320 A/cm and a magnetic saturation ranging from 1.45 to 1.75 T,
- wherein the spring element has a microstructure comprised of 10 to 55% by weight of a soft-magnetic ferrite and a remainder of substantially hard-magnetic martensite.
Dependencies are inferred from the claim text.