Abstract
*Division of Advanced Materials Science and Engineering, PKNU, Busan, KoreaKEY WORDS: Weld metal 용접금속, Cold cracking 저온균열, Diffusible hydrogen content 확산성수소량, Hardness 경도ABSTRACT: 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 paramet ers 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 stren gth than the base metal. This showed that weld metal hardness h ad a more powerful effect on weld metal cold cracking than the diffusible hydrogen content in this experiment.교신저자 방국수: 부산광역시 남구 용당동 산 100, 051-629-6379, ksbang@pknu.ac.kr
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