Title:
VEHICLE PART HAVING HIGH STRENGTH AND EXCELLENT DURABILITY, AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2017/111456
Kind Code:
A1
Abstract:
The present invention relates to a vehicle part having high strength and excellent durability, and a manufacturing method therefor. According to one aspect of the present invention, the vehicle part comprises, by a weight ratio, a composition comprising 0.20-0.50% of C, 0.5% or less of Si, 1.0-2.0% of Mn, 0.01-0.1% of Al, 0.010% or less of P, 0.003% or less of S, 0.01-0.1% of Ti, 0.05-0.5% of Cr, 0.05-0.3% of Mo, 0.01% or less of N, and the remainder being Fe and other inevitable impurities, and the vehicle part can have, by an area ratio, a microstructure comprising 90% or more of tempered martensite, 4% or less of residual austenite, and the remainder being one type or both of two types selected from among the ferrite and bainite structures.
Inventors:
CHO YEOL-RAE (KR)
CHUNG YOUN-IL (KR)
SEONG HWAN-GOO (KR)
PARK KI-HYUN (KR)
CHUNG YOUN-IL (KR)
SEONG HWAN-GOO (KR)
PARK KI-HYUN (KR)
Application Number:
PCT/KR2016/015003
Publication Date:
June 29, 2017
Filing Date:
December 21, 2016
Export Citation:
Assignee:
POSCO (KR)
International Classes:
C22C38/38; B21D53/88; C21D9/00; C22C38/00; C22C38/22; C22C38/24; C22C38/26; C22C38/28; C22C38/32; C22C38/58
Foreign References:
| JP2010150612A | 2010-07-08 | |||
| KR20140016619A | 2014-02-10 | |||
| KR20090124263A | 2009-12-03 | |||
| KR101340758B1 | 2013-12-12 | |||
| KR100948998B1 | 2010-03-23 |
Other References:
See also references of EP 3395994A4
Attorney, Agent or Firm:
C&S PATENT AND LAW OFFICE (KR)
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