STEEL FOR AUTOMOTIVE SUSPENSION SPRING COMPONENT, AUTOMOTIVE SUSPENSION SPRING COMPONENT, AND MANUFACTURING METHOD FOR SAME

Title:

STEEL FOR AUTOMOTIVE SUSPENSION SPRING COMPONENT, AUTOMOTIVE SUSPENSION SPRING COMPONENT, AND MANUFACTURING METHOD FOR SAME

Document Type and Number:

WIPO Patent Application WO/2012/153831

Kind Code:

A1

Abstract:

　Disclosed is a steel for automotive suspension spring components that is characterized by: comprising 0.15-0.35 mass% of C, more than 0.6 mass% and at most 1.5 mass% of Si, 1-3 mass% of Mn, 0.3-0.8 mass% of Cr, 0.005-0.080 mass% of sol. Al, 0.005-0.060 mass% of Ti, 0.005-0.060 mass% of Nb, at most 150 ppm of N, at most 0.035 mass% of P, at most 0.035 mass% of S, 0.01-1.00 mass% of Cu, and 0.01-1.00 mass% of Ni, with the remainder consisting of Fe and unavoidable impurities; Ti+Nb≤0.07 mass%; having a tensile strength of at least 1300 MPa; and exhibiting superior corrosion resistance and low-temperature toughness.

Inventors:

TANGE AKIRA (JP)
KURIMOTO KIYOSHI (JP)
GOTO YURIKA (JP)
KIKUCHI KATSUHIKO (JP)
TOMITA KUNIKAZU (JP)
FUKUOKA KAZUAKI (JP)
HATTORI KAZUAKI (JP)

Application Number:

PCT/JP2012/062106

Publication Date:

November 15, 2012

Filing Date:

May 11, 2012

Export Citation:

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Assignee:

NHK SPRING CO LTD (JP)
JFE BARS & SHAPES CORP (JP)
TANGE AKIRA (JP)
KURIMOTO KIYOSHI (JP)
GOTO YURIKA (JP)
KIKUCHI KATSUHIKO (JP)
TOMITA KUNIKAZU (JP)
FUKUOKA KAZUAKI (JP)
HATTORI KAZUAKI (JP)

International Classes:

C22C38/00; B60G21/055; C21D9/02; C22C38/58; C22C38/60; F16F1/02

Foreign References:

JP2010185109A	2010-08-26
JP2003105485A	2003-04-09
JPH0693339A	1994-04-05
JP2007284774A	2007-11-01
JP2002097547A	2002-04-02
JP2010185109A	2010-08-26

Other References: