Title:
BEARING WIRE ROD AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2021/125435
Kind Code:
A1
Abstract:
A spring wire rod having improved toughness and corrosion fatigue properties is disclosed. The disclosed wire rod comprises, by wt%, 0.4-0.7% of C, 1.2-2.3% of Si, 0.2-0.8% of Mn, 0.2-0.8% of Cr, and the balance of Fe and inevitable impurities, and has a grain size of 13.2 ㎛ or lower and a Charpy impact energy of 38 J/㎠ or higher.
Inventors:
LEE JAE SEUNG (KR)
MIN SE HONG (KR)
KIM KYOUNG-WON (KR)
CHOI WOO SEOK (KR)
KIM KI-HWAN (KR)
PARK IN GYU (KR)
MIN SE HONG (KR)
KIM KYOUNG-WON (KR)
CHOI WOO SEOK (KR)
KIM KI-HWAN (KR)
PARK IN GYU (KR)
Application Number:
PCT/KR2020/001721
Publication Date:
June 24, 2021
Filing Date:
February 06, 2020
Export Citation:
Assignee:
POSCO (KR)
International Classes:
C22C38/26; B21B1/16; B21B3/00; C21D8/06
Foreign References:
| KR20170054492A | 2017-05-17 | |||
| KR20160060892A | 2016-05-31 | |||
| JP2012233254A | 2012-11-29 | |||
| JP2016113637A | 2016-06-23 | |||
| KR101408548B1 | 2014-06-17 |
Other References:
See also references of EP 4060073A4
Attorney, Agent or Firm:
SELIM INTELLECTUAL PROPERTY LAW FIRM (KR)
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