Title:
NON-QUENCHED AND TEMPERED STEEL ROD WIRE FOR HOT FORGING WITH IMPROVED MACHINABILITY AND TOUGHNESS AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2023/229428
Kind Code:
A1
Abstract:
Disclosed are a non-quenched and tempered steel rod wire for hot forging with improved machinability and toughness and a method for manufacturing same. The non-quenched and tempered steel rod wire according to the present invention comprises, in weight%, C: 0.3-0.5%, Si: 0.4-0.9%, Mn: 0.5-1.2%, P: 0.02% or less, S: 0.01-0.05%, sol.Al: 0.01-0.05%, Cr 0.1%-0.3%, Ti: 0.01%-0.02%, Ca: 0.0005%-0.002%, and N: 0.007%-0.02%, with the remainder being Fe and inevitable impurities, and also comprises ferrite and pearlite as microstructures, and satisfies relational expression 1. [Relational expression 1] 2 ≤ (Al+Ti)/N ≤ 5
Inventors:
LIM NAMSUK (KR)
MUN DONGJUN (KR)
KIM HANHWI (KR)
MUN DONGJUN (KR)
KIM HANHWI (KR)
Application Number:
PCT/KR2023/007282
Publication Date:
November 30, 2023
Filing Date:
May 26, 2023
Export Citation:
Assignee:
POSCO CO LTD (KR)
International Classes:
C22C38/28; B21B1/16; B21C47/02; C21D9/573; C22C38/00
Foreign References:
| KR20200062439A | 2020-06-04 | |||
| JPH0673490A | 1994-03-15 | |||
| JPH0925541A | 1997-01-28 | |||
| KR20160068120A | 2016-06-15 | |||
| KR20000025695A | 2000-05-06 |
Attorney, Agent or Firm:
SELIM INTELLECTUAL PROPERTY LAW FIRM (KR)
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