Title:
WIRE ROD AND STEEL WIRE FOR SPRING, SPRING WITH IMPROVED STRENGTH AND FATIGUE LIMIT, AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2022/255727
Kind Code:
A1
Abstract:
Disclosed are a wire rod and a steel wire for a spring, a spring with improved strength and fatigue limit, and a method for manufacturing same. The disclosed wire rod for a spring with improved strength and fatigue limit, according to one embodiment, comprises, in percentage by weight: C: 0.6-0.7%; Si: 2.0-2.5%; Mn: 0.2-0.7%; Cr: 0.9-1.5%; P: 0.015% or less; S: 0.01% or less; Al: 0.01% or less; N: 0.01% or less; Mo: 0.25% or less; W: 0.25% or less; V: 0.05-0.2% or less; Nb: 0.05% or less; and the balance consisting of Fe and unavoidable impurities, wherein Mn+Cr≤1.8% may be satisfied, and 0.05 at%≤Mo+W≤0.15 at% may be satisfied.
Inventors:
LEE JUNMO (KR)
CHOI SEOKHWAN (KR)
CHOI MYUNGSOO (KR)
CHOI SEOKHWAN (KR)
CHOI MYUNGSOO (KR)
Application Number:
PCT/KR2022/007483
Publication Date:
December 08, 2022
Filing Date:
May 26, 2022
Export Citation:
Assignee:
POSCO HOLDINGS INC (KR)
International Classes:
C22C38/34; B22D11/00; C21D1/18; C21D8/02; C21D9/54; C22C38/00; C22C38/22; C22C38/24; C22C38/26
Foreign References:
| KR20120040728A | 2012-04-27 | |||
| JP2009068030A | 2009-04-02 | |||
| KR20210036916A | 2021-04-05 | |||
| KR20130026135A | 2013-03-13 | |||
| KR20110048744A | 2011-05-12 | |||
| KR20000043776A | 2000-07-15 |
Attorney, Agent or Firm:
SELIM INTELLECTUAL PROPERTY LAW FIRM (KR)
Download PDF: