WIRE ROD AND PARTS WITH IMPROVED DELAYED FRACTURE RESISTANCE, AND METHODS FOR MANUFACTURING SAME

Title:

WIRE ROD AND PARTS WITH IMPROVED DELAYED FRACTURE RESISTANCE, AND METHODS FOR MANUFACTURING SAME

Document Type and Number:

WIPO Patent Application WO/2022/131752

Kind Code:

A1

Abstract:

Disclosed are a wire rod and parts with improved delayed fracture resistance, and methods for manufacturing same. The wire rod with improved delayed fracture resistance according to the present invention comprises 0.15 to 0.30 wt% of C, 0.15 to 0.25 wt% of Si, 0.95 to 1.35 wt% of Mn, at most 0.030 wt% of P, at most 0.030 wt% of S, 0.015 to 0.030 wt% of Ti, 0.0010 to 0.0040 wt% of B, and 0.0010 to 0.0080 wt% of N, with the balance being Fe and inevitable impurities, and satisfies relational expression 1. [Relational expression 1] 2.0≤5.5Х[Si]+[Mn]≤2.4 (in relational expression 1, [Si] and [Mn] each represent the content (wt%) of the corresponding element.

Inventors:

CHUN YOUNGSOO (KR)
LEE SANG-YOON (KR)
CHOI SEOK-HWAN (KR)
CHOI MYUNGSOO (KR)

Application Number:

PCT/KR2021/018977

Publication Date:

June 23, 2022

Filing Date:

December 14, 2021

Export Citation:

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Assignee:

POSCO (KR)

International Classes:

C22C38/00; C21D8/06; C21D9/52; C22C38/02; C22C38/04; C22C38/14

Foreign References:

KR20120099153A	2012-09-06
KR20100076743A	2010-07-06
JP2013234349A	2013-11-21
KR20070086836A	2007-08-27
CN107815594A	2018-03-20

Attorney, Agent or Firm:

SELIM INTELLECTUAL PROPERTY LAW FIRM (KR)

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