[ Technical Papers ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 29, No. 2, pp.141-146

ISSN: 2508-5107 (Online)

Print publication date 15 Apr 2020

Received 18 Mar 2020 Revised 03 Apr 2020 Accepted 08 Apr 2020

DOI: https://doi.org/10.7735/ksmte.2020.29.2.141

초고장력 강판의 CMT 용접 조건과 용접 이음부 분석

방양근^a^{, b} ; 강유성^c ; 송문섭^b ; 전용호^c^{, *}

Analysis of Welding Conditions and Weld Joints of Advanced High-strength Steel Through Cold-metal Transfer Welding

Yangkeun Bang^a^{, b} ; Yousung Kang^c ; Moonseob Song^b ; Yongho Jeon^c^{, *}

aGraduate school of engineering, Ajou University
bInstitute of technology, Seojin Industrial
cDepartment of Mechanical Engineering, Ajou University

Correspondence to: ^*Tel.: +31-219-3652 E-mail address: princaps@ajou.ac.kr (Yongho Jeon).

Abstract

Lightweight vehicles are essential in the automotive industry and are receiving increasing attention in research studies. In particular, investigations on the welding of advanced high-strength steel (AHSS) have been conducted recently. In this study, the lap joint welding of AHSS was performed through a cold-metal transfer welding process, and the defects in the cross-section were analyzed to determine the optimum welding condition. Additionally, tensile tests were carried out under the selected welding conditions to check if the weld had a similar tensile strength to that of the base material. Fracture mainly occurred at the boundary of the heat-affected zone, which was analyzed through the increase in hardness.

Keywords:

AHSS, CMT welding, Tensile strength, Lap joint weld, Hardness

Acknowledgments

본 연구는 2017학년도 아주대학교 일반연구비의 지원에 의해 수행되었습니다.

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