Efecto del nitrógeno y la corriente media pulsada de soldadura en la formación de grietas de solidificación en aceros inoxidables AI5I 316L

R. E. Trevisan; E. Braga; H. A. Fals

doi:10.3989/revmetalm.2002.v38.i4.408

Effects of nitrogen and pulsed mean welding current in AISI 316 austenitic stainless steel solidification cracks

Authors

R. E. Trevisan Universidade Estadual de Campinas.
E. Braga Universidade Estadual de Campinas.
H. A. Fals Universidad de Oriente. FIM. Santiago de Cuba.

DOI:

https://doi.org/10.3989/revmetalm.2002.v38.i4.408

Keywords:

Austenitic steel, Solidification cracking, Flux corel are welding, Nitrogen, δ ferrite,

Abstract

An analysis of the influence of nitrogen concentration in the weld zone and the pulsed mean welding current in the solidification crack formation is presented in this paper. The AISI 316L austenitic stainless steel was employed as the metal base. The welding was done using CC+ pulsed flux cored arc welding process and AWS E316LT-1 wire type. The tests were conducted using CO₂ shielding gas with four different nitrogen levels (0, 5, 10 and 15 %) in order to induce different nitrogen weld metal concentrations. The pulsed mean welding current was varied in three levels and the Transvarestraint tangential strain test was fixed of 5 %. The results showed that the solidification cracking decreased as the pulsed mean welding current increase. It was also verified that an increase of the weld zone nitrogen level was associated with a decrease in both the total length of solidification crack and the amount of δ ferrite.

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Published

2002-08-30

How to Cite

Trevisan, R. E., Braga, E., & Fals, H. A. (2002). Effects of nitrogen and pulsed mean welding current in AISI 316 austenitic stainless steel solidification cracks. Revista De Metalurgia, 38(4), 256–262. https://doi.org/10.3989/revmetalm.2002.v38.i4.408

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Issue

Vol. 38 No. 4 (2002)

Section

Articles

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