TY - JOUR
T1 - Nitrogen desorption by high-nitrogen steel weld metal during CO 2 laser welding
AU - Dong, Wei
AU - Kokawa, Hiroyuki
AU - Tsukamoto, Susumu
AU - Sato, Yutaka S.
N1 - Funding Information:
The authors are grateful to Messrs. Y. Asai, A. Honda, and H. Tanaka for their technical assistance. They also thank Daido Steel Co., Ltd., for providing the HNSs in the ISIJ Forum on HNSs. This work was partly supported by a Sasakawa Scientific Research grant from The Japan Science Society.
PY - 2005/10
Y1 - 2005/10
N2 - Nitrogen desorption by high-nitrogen steels (HNSs) containing 0.32 and 0. 53 pct nitrogen during CO2 laser welding in an Ar-N2 gas mixture was investigated and the obtained data were compared with those for arc welding and at the equilibrium state predicted by Sieverts' Law. Although the nitrogen content in the weld metal during CO2 laser welding was lower than that in the as-received base material in all conditions, the nitrogen desorption was larger in the top part of the weld metal than in the keyhole region. The nitrogen desorption in the Ar atmosphere was less during CO2 laser welding than during arc welding. With the increase in nitrogen partial pressure, the nitrogen content in the weld metal sharply increased during arc welding, but only slightly increased during CO2 laser welding. The nitrogen absorption and desorption of the HNS weld metal were much smaller during CO2 laser welding than during arc welding.
AB - Nitrogen desorption by high-nitrogen steels (HNSs) containing 0.32 and 0. 53 pct nitrogen during CO2 laser welding in an Ar-N2 gas mixture was investigated and the obtained data were compared with those for arc welding and at the equilibrium state predicted by Sieverts' Law. Although the nitrogen content in the weld metal during CO2 laser welding was lower than that in the as-received base material in all conditions, the nitrogen desorption was larger in the top part of the weld metal than in the keyhole region. The nitrogen desorption in the Ar atmosphere was less during CO2 laser welding than during arc welding. With the increase in nitrogen partial pressure, the nitrogen content in the weld metal sharply increased during arc welding, but only slightly increased during CO2 laser welding. The nitrogen absorption and desorption of the HNS weld metal were much smaller during CO2 laser welding than during arc welding.
UR - http://www.scopus.com/inward/record.url?scp=27544439000&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=27544439000&partnerID=8YFLogxK
U2 - 10.1007/s11663-005-0058-4
DO - 10.1007/s11663-005-0058-4
M3 - Article
AN - SCOPUS:27544439000
VL - 36
SP - 677
EP - 681
JO - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
JF - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
SN - 1073-5615
IS - 5
ER -