WIRE ROD AND STEEL WIRE FOR HIGH STRENGTH SPRING, AND MANUFACTURING METHOD THEREFOR

WIPO Patent Application WO/2021/010554

A1

Disclosed are: a wire rod and a steel wire for a high stress suspension spring for a motorcycle, wherein decarbonization and low temperature-structure occurrence are easily suppressed when the the wire rod and the steel wire are cooled down; and a manufacturing method therefor. A steel wire for a high strength spring according to the present invention comprises, by wt%: 0.55 to 0.7% of C; 0.4 to 0.9% of Si; 0.2 to 0.8 of Mn; 0.3% or less of Cr; 0.015% or less of P; 0.01% or less of S; 0.01% or less of Al; 0.005% or less of N; and the balance of Fe and inevitable impurities, satisfies formula (1) below, and comprises 90% or more of tempered martensite structures. (1) 0.7 ≤ C + (1/6)Mn + (1/5)Cr + (1/24)Si ≤ 0.8

WO/2003/083151	STEEL WIRE FOR HARD DRAWN SPRING EXCELLENT IN FATIGUE STRENGTH AND RESISTANCE TO SETTLING, AND HARD DRAWN SPRING
WO/2018/086658	METHOD FOR PRODUCING A ROLLING BEARING RING HAVING AN IMPROVED ROBUSTNESS AGAINST THE FORMATION OF WHITE ETCHING CRACKS (WEC)
JP6696495	Manufacturing method of hot-dip galvanized steel sheet

LEE JUN MO (KR)
KIM HAN HWI (KR)
CHOI MYUNG SOO (KR)
CHOI SEOK HWAN (KR)

PCT/KR2019/018528

January 21, 2021

December 26, 2019

Click for automatic bibliography generation  

POSCO (KR)

C22C38/02; C21D9/02; C22C38/04; C22C38/18; F16F1/00

KR20180072965A	2018-07-02
KR20160009659A	2016-01-26
KR20180110002A	2018-10-08
JP2012041587A	2012-03-01
JPH07258787A	1995-10-09

SELIM INTELLECTUAL PROPERTY LAW FIRM (KR)

View/Download PDF      PDF Help

Previous Patent: FABRIC OF CORDLESS DOUBLE BLIND AND DEVICE FOR PREVENTING BENDING OF LOWER ROTATING BAR

Next Patent: ACTIVE LAYER FOR SOLAR CELL HAVING BULK HETEROJUNCTION STRUCTURE WITH PEROVSKITE PARTICLES DISPERSED...