STEEL FOR BELT-TYPE CVT PULLEY AND BELT-TYPE CVT PULLEY

• Main Authors: KATO GEN, HARITANI MAKOTO, KATO SINICHIRO, TERADA HIROKI, YAMAGUCHI KATSUYA, FUJIMOTO MITSURU
• Format: Patent
• Language: English
• Published: 31.10.2013
• Subjects: ALLOYS; BLASTING; CHEMISTRY; ENGINEERING ELEMENTS AND UNITS; FERROUS OR NON-FERROUS ALLOYS; GEARING; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MECHANICAL ENGINEERING; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; THERMAL INSULATION IN GENERAL; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WEAPONS

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.