Title:
NON-HEAT TREATED WIRE ROD HAVING EXCELLENT DRAWABILITY AND IMPACT TOUGHNESS AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2021/125710
Kind Code:
A1
Abstract:
Provided are a non-heat treated wire rod having excellent drawability and impact toughness and a method for manufacturing same. The non-heat treated wire rod of the present invention contains, in weight%, C: 0.02-0.30%, Si: 0.05-0.8%, Mn: 0.5-2.0%, Cr: 1.0% or less, P: 0.03% or less, S: 0.03% or less, sol.Al: 0.01-0.07%, N: more than 0.01% and no more than 0.02%, and at least one of Nb: 0.1% or less, V: 0.5% or less, Ti: 0.1% or less, and the balance being Fe and inevitable impurities, and has a microstructure of a wire rod containing ferrite and pearlite, wherein the ferrite is formed continuously or discontinuously at predetermined intervals in a direction parallel to the rolling direction of the wire rod to configure a plurality of ferrite layers, and the pearlite is formed continuously or discontinuously in the insides or outsides of the ferrite layers in a direction parallel to the rolling direction of the wire rod to configure a plurality of pearlite layers.
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Inventors:
MUN DONG-JUN (KR)
PARK IN-GYU (KR)
MIN SE-HONG (KR)
PARK IN-GYU (KR)
MIN SE-HONG (KR)
Application Number:
PCT/KR2020/018188
Publication Date:
June 24, 2021
Filing Date:
December 11, 2020
Export Citation:
Assignee:
POSCO (KR)
International Classes:
C22C38/38; C21D8/06; C21D9/68; C22C38/00; C22C38/24; C22C38/28
Foreign References:
| JP2004060049A | 2004-02-26 | |||
| KR20160068048A | 2016-06-15 | |||
| KR20170056059A | 2017-05-23 | |||
| KR20150071216A | 2015-06-26 | |||
| JP2014129582A | 2014-07-10 |
Other References:
See also references of EP 4079914A4
Attorney, Agent or Firm:
C&S PATENT AND LAW OFFICE (KR)
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