Patent ID: 8007602
Filing Date: 2011-08-30
Classification: B60S,C21D,C22C,Y10S

Abstract:
1. 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.