Efecto de los ciclos térmicos sobre la ZAT de una soldadura multipasos de un acero inoxidable superdúplex SAF 2507

AUTOR(ES)

Villalobos, D., Maldonado, C., Albiter, A., Robles-Piedras, E.

FONTE

Soldagem & Inspeção

DATA DE PUBLICAÇÃO

2010-09

RESUMO

Thermal cycles experienced by a superduplex stainless steel SAF 2507 when is welded, can promote the precipitation of secondary phases which decrease the mechanical properties as well as the corrosion resistance. Due to the application of the duplex alloys in the petrochemical industry, the study of these alloys has become very important in order to predict its service behavior. The aim of this work is to study the microstructural changes in the superduplex stainless steel weld joint after applying the GTAW process under three interpass temperatures after the deposition of every single pass. The results showed that slow cooling rates promoted by the deposition of the subsecuent passes and the higher interpass temperature, promote the precipitation of sigma phase in the HAZ while rapid cooling rates promoted by the lower interpass temperature do not promote the sigma phase precipitation.

Documentos Relacionados

• Evolución microestructural de un acero inoxidable superdúplex bajo ciclos térmicos de corta duración
• Efecto del tiempo de superpulso de soldadura sobre la evolución microestructural de un acero de bajo carbono
• Efecto de los parámetros de soldadura en mallas de acero electrosoldadas
• Microstructural changes in SAF 2507 superduplex stainless steel produced by thermal cycle
• Efecto de los parámetros de soldadura sobre la microestructura de recargues nanoestructurados base hierro depositados por FCAW-S