US 12,220,770 B2
Pre-stressed steel sheet
Jae-Yik Lee, Pohang-si (KR)
Assigned to POSCO, Pohang-si (KR)
Appl. No. 17/783,709
Filed by POSCO, Pohang-si (KR)
PCT Filed Dec. 10, 2020, PCT No. PCT/KR2020/018088
§ 371(c)(1), (2) Date Jun. 9, 2022,
PCT Pub. No. WO2021/118274, PCT Pub. Date Jun. 17, 2021.
Claims priority of application No. 10-2019-0164279 (KR), filed on Dec. 11, 2019.
Prior Publication US 2023/0008459 A1, Jan. 12, 2023
Int. Cl. B32B 3/00 (2006.01); B21D 1/00 (2006.01); B21D 1/02 (2006.01); B23K 9/04 (2006.01); B23K 9/235 (2006.01); B23K 26/00 (2014.01); B23K 26/34 (2014.01); B23K 26/60 (2014.01); B23K 31/00 (2006.01); B23K 33/00 (2006.01); B32B 3/02 (2006.01); B32B 3/08 (2006.01); B32B 3/10 (2006.01); B32B 3/14 (2006.01); B32B 3/26 (2006.01); B32B 3/30 (2006.01); B32B 15/01 (2006.01); B32B 15/04 (2006.01); B32B 15/18 (2006.01); B23K 101/18 (2006.01); B23K 101/28 (2006.01); B23K 103/04 (2006.01)
CPC B23K 33/002 (2013.01) [B21D 1/00 (2013.01); B21D 1/02 (2013.01); B23K 9/042 (2013.01); B23K 9/235 (2013.01); B23K 26/0093 (2013.01); B23K 26/34 (2013.01); B23K 26/60 (2015.10); B23K 31/003 (2013.01); B32B 3/00 (2013.01); B32B 3/02 (2013.01); B32B 3/08 (2013.01); B32B 3/10 (2013.01); B32B 3/14 (2013.01); B32B 3/26 (2013.01); B32B 3/263 (2013.01); B32B 3/30 (2013.01); B32B 15/01 (2013.01); B32B 15/011 (2013.01); B32B 15/012 (2013.01); B32B 15/013 (2013.01); B32B 15/04 (2013.01); B32B 15/18 (2013.01); B23K 2101/18 (2018.08); B23K 2101/28 (2018.08); B23K 2103/04 (2018.08); Y10T 428/12306 (2015.01); Y10T 428/12319 (2015.01); Y10T 428/12389 (2015.01); Y10T 428/12396 (2015.01); Y10T 428/12854 (2015.01); Y10T 428/12951 (2015.01); Y10T 428/12958 (2015.01); Y10T 428/12965 (2015.01); Y10T 428/12972 (2015.01); Y10T 428/12979 (2015.01); Y10T 428/12993 (2015.01); Y10T 428/24942 (2015.01); Y10T 428/2495 (2015.01); Y10T 428/24967 (2015.01); Y10T 428/26 (2015.01)] 10 Claims
OG exemplary drawing
 
1. A pre-stressed steel sheet, comprising:
a base material; and
a plurality of weld lines formed on the base material,
wherein an average spacing between a weld line and an adjacent weld line among the plurality of weld lines is equal to or greater than five times a width of the weld lines and equal to or less than ½ times a width of the steel sheet, and
wherein a number of the plurality of weld lines is 2×(L/W) or more,
where L is a length of the steel sheet and W is the width of the steel sheet.