corrosion resistance and application of normal and super duplex stainless steels have been summarized
and different kinds of precipitated phases
harmful phases
pitting resistant equivalent (PRE) and effect of welding on structure and properties of duplex stainless steel are analyzed. It is obtained that with controlling alloy chemical composition adjusting pitting resistant equivalent value ; scheduling reasonable heat treatment process to control the precipitation of harmful phases and the ratio of dual phase content near to 1
it is able to get better corrosion
higher strength and wear-resistant duplex stainless steel.