| 摘要 |
Ferritic-austenitic duplex stainless steel comprising the following components in the following proportions in % by weight: 0<C</=0.08, -Si 0.2-2.0, -Mn 0.2-2.0, -Cr 19.0-30.0, -Ni 3.0-9.0, -Mo 1.0-5.0, -Cu 0.5-3.0, -Co 0.2-4.0, -N 0.05-0.35, - the balance being substantially Fe and inevitable impurities, the proportions of Cr and Ni having the correlation of 19.0</=Cr<24.0 and 3.0</=Ni</=8.0, or 24.0</=Cr</=30.0 and 4.0</=Ni</=9.0 the micro structure of the steel containing delta-ferrite phase in an amount of 30 to 70% in area ratio. |
