STEEL FOR BELT-TYPE CVT PULLEY AND BELT-TYPE CVT PULLEY
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United States of America Patent
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Issued Date -
Oct 31, 2013
app pub date -
Apr 23, 2013
filing date -
Apr 25, 2012
priority date (Note) -
Abandoned
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Abstract
A steel for a belt-type CVT pulley made of chromium steel or chromium molybdenum steel according to the present invention has a component composition that satisfies predetermined formulae regarding the mass % of Mn, Ni, Cr, Mo, Si, Nb and Ti. In addition, the steel for a belt-type CVT pulley contains, in terms of mass %, as essentially added elements, 0.15% to 0.25% of C, 0.40% to 1.00% of Mn, more than 1.80% and 2.20% or less of Cr, 0.005% to 0.030% of N, and 0.010% to 0.060% of Al, and as arbitrarily added elements, 0.20% or less of Si, 0.03% or less of P, 0.05% or less of S, 0.3% or less of Cu, 0.3% or less of Ni, and 0.2% or less of Mo, with the remainder being Fe and inevitable impurities.
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