SOLID STABILIZER, STEEL MATERIAL FOR SOLID STABILIZER, AND MANUFACTURING METHOD OF SOLID STABILIZER
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United States of America Patent
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Issued Date -
Dec 20, 2012
app pub date -
Mar 4, 2011
filing date -
Mar 8, 2010
priority date (Note) -
Abandoned
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Abstract
A steel material for a solid stabilizer which has high bendability, high hardenability, and high quenching crack resistance, a solid stabilizer having high strength, and a manufacturing method of the solid stabilizer. The steel material for the solid stabilizer contains, in mass %, 0.24 to 0.40% of C, 0.15 to 0.40% of Si, 0.50 to 1.20% of Mn, 0.03% or less of P, 0.30% or less of Cr, 0.01 to 0.03% of Ti, and 0.0010 to 0.0030% of B. The steel material for the solid stabilizer satisfies a condition of formula (1) below. Hardness in a radial center portion of the steel material for the solid stabilizer after tempering is 400 HV or more, and a martensite ratio in the radial center portion after the tempering is 80% or more.
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