Title:
WIRE ROD FOR COLD HEADING, PROCESSED PRODUCT USING SAME, AND MANUFACTURING METHODS THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/046016
Kind Code:
A1
Abstract:
The present invention relates to: a wire rod for cold heading, which ensures cold forgeability and also has improved hydrogen-delayed fracture resistance by reducing the Si content thereof and containing Mo and V added thereto; a processed product using same; and manufacturing methods therefor. The wire rod for cold heading according to one embodiment of the present invention comprises: 0.3 to 0.5% by weight of C; 0.1 to 0.3% by weight of Si; 0.5 to 1.0% by weight of Mn; at least two of 0.5 to 1.5% by weight of Cr, 0.5 to 1.5% by weight of Mo, and 0.01 to 0.2% by weight of V; and the balance Fe and other impurities, and has a value, obtained by formula (1) below, of 3.56 or more. Formula (1) [Cr] + 2.7*[Mo] +6*[V]
Inventors:
JUNG BYUNG-IN (KR)
LEE SANG-YOON (KR)
KIM HAN HWI (KR)
LEE SANG-YOON (KR)
KIM HAN HWI (KR)
Application Number:
PCT/KR2019/011086
Publication Date:
March 05, 2020
Filing Date:
August 29, 2019
Export Citation:
Assignee:
POSCO (KR)
International Classes:
C22C38/04; B21B1/16; B21B3/00; B21B37/74; C21D9/52; C22C38/02; C22C38/12; C22C38/22; C22C38/24
Foreign References:
| KR20040006248A | 2004-01-24 | |||
| KR20100050037A | 2010-05-13 | |||
| KR20010064845A | 2001-07-11 | |||
| JP2731797B2 | 1998-03-25 | |||
| US20030066576A1 | 2003-04-10 |
Other References:
See also references of EP 3828300A4
Attorney, Agent or Firm:
SELIM INTELLECTUAL PROPERTY LAW FIRM (KR)
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