TY - JOUR
T1 - Nitrogen absorption by iron and stainless steels during CO2 laser welding
AU - Dong, Wei
AU - Kokawa, Hiroyuki
AU - Sato, Yutaka S.
AU - Tsukamoto, Susumu
N1 - Funding Information:
The authors are grateful to Mr. Y. Asai and Mr. A. Honda for their technical assistance. They also thank Emeritus Professor T. Kuwana and Professor Y. Sato for their useful advice. This work was partly supported by a Sasakawa Scientific Research Grant from The Japan Science Society.
PY - 2003/2
Y1 - 2003/2
N2 - Nitrogen absorption by iron, Fe-20Cr-10Ni alloy, and SUS329J1 duplex stainless steel during CO2 laser welding in an Ar-N2 gas mixture was investigated and compared with equilibrium data predicted on Sieverts' law and data on absorption during arc and YAG laser welding. The nitrogen absorption during CO2 laser welding is lower than that during arc welding, but higher than that during YAG laser welding. Compared with arc welding, the lesser contact of monatomic nitrogen with the weld pool surface and the higher partial pressure of metal vapor in the keyhole may result in the lower nitrogen absorption during CO2 laser welding, while the very low density of monatomic nitrogen in the atmosphere during YAG laser welding due to the low-temperature plume may lead to the lower nitrogen absorption during YAG laser welding than during CO2 laser welding.
AB - Nitrogen absorption by iron, Fe-20Cr-10Ni alloy, and SUS329J1 duplex stainless steel during CO2 laser welding in an Ar-N2 gas mixture was investigated and compared with equilibrium data predicted on Sieverts' law and data on absorption during arc and YAG laser welding. The nitrogen absorption during CO2 laser welding is lower than that during arc welding, but higher than that during YAG laser welding. Compared with arc welding, the lesser contact of monatomic nitrogen with the weld pool surface and the higher partial pressure of metal vapor in the keyhole may result in the lower nitrogen absorption during CO2 laser welding, while the very low density of monatomic nitrogen in the atmosphere during YAG laser welding due to the low-temperature plume may lead to the lower nitrogen absorption during YAG laser welding than during CO2 laser welding.
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U2 - 10.1007/s11663-003-0057-2
DO - 10.1007/s11663-003-0057-2
M3 - Article
AN - SCOPUS:0037295504
SN - 1073-5615
VL - 34
SP - 75
EP - 82
JO - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
JF - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
IS - 1
ER -