US 11,679,453 B2
Filler metal for TIG welding
Sang-Myung Cho, Busan (KR); Dong-Soo Oh, Gyeong-sangnam-do (KR); Hyo-Sik Ham, Busan (KR); Hyeon-Joo Ha, Busan (KR); Hee-Seop Shin, Busan (KR); Jae-Ho Jun, Busan (KR); Jae-Gyu Byun, Busan (KR); Jung-Hyun Park, Busan (KR); and Hyuk-Yong Kwon, Gyeong-sangbuk-do (KR)
Assigned to PUKYONG NATIONAL INDUSTRY-UNIVERSIT COOPERATION FOUNDATION, Busan (KR)
Filed by PUKYONG NATIONAL UNIVERSITY INDUSTRY-UNIVERSITY COOPERATION FOUNDATION, Busan (KR)
Filed on Jun. 11, 2020, as Appl. No. 16/898,937.
Application 16/898,937 is a continuation of application No. 14/912,899, abandoned, previously published as PCT/KR2013/011116, filed on Dec. 3, 2013.
Claims priority of application No. 10-2013-0098314 (KR), filed on Aug. 20, 2013.
Prior Publication US 2020/0298348 A1, Sep. 24, 2020
Int. Cl. B23K 35/02 (2006.01); B23K 9/167 (2006.01)
CPC B23K 35/0277 (2013.01) [B23K 9/167 (2013.01); B23K 35/02 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A filler metal for Tungsten Inert Gas (TIG) welding,
of which a cross-section of the filler metal has a concavely curved shape,
wherein a concavely curved surface of the filler metal is determined by a curve connecting normal lines to plasma streamlines,
a shape f(r) of the plasma streamlines is defined by a following equation,

OG Complex Work Unit Math
where, r is a distance along a radius direction when an electrode is assumed to a center, f(0) is a vertical distance from the electrode to a base metal, and σ means variance, a value of the σ is selected in accordance with the distance along the radius direction,
wherein one normal line to the plasma streamlines is obtained at a cross point with the normal lines of an adjacent plasma streamlines.