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J. Ocean Eng. Technol. > Volume 26(2); 2012 > Article
J. Ocean Eng. Technol. 2012;26(2):33-38.    
DOI: https://doi.org/10.5574/KSOE.2012.26.2.033   

Effects of Diffusible Hydrogen Content and Hardness on Cold Cracking in High Strength Weld Metal
Seo Won-Chan,Bang Kook-Soo
Division of Advanced Materials Science and Engineering PKNU,Division of Advanced Materials Science and Engineering PKNU
고강도강 용접금속 저온균열 발생에 미치는 확산성수소량 및 경도의 영향
서원찬,방국수
부경대학교 신소재공학부,부경대학교 신소재공학부
Copyright © 2012 The Korean Society of Ocean Engineers     Open access / Under a Creative Commons License
Key Words: Weld metal, Cold cracking, Diffusible hydrogen content, Hardness
핵심용어: 용접금속, 저온균열, 확산성수소량, 경도
Abstract
The effects of the diffusible hydrogen content and hardness on the cold cracking in high strength weld metal were investigated. The diffusible hydrogen contents were influenced by welding parameters such as the voltage and contact tip-to-work distance (CTWD). The diffusible hydrogen content increased with an increase in voltage. However, it was decreased with an increase in CTWD. CTWD also influenced the weld metal hardness,especially when the wire used had a higher strength than the base metal. This showed that weld metal hardness had a more powerful effect on weld metal cold cracking than the diffusible hydrogen content in this experiment.


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