Both the high density tangled dislocation and carbonitride precipitated along with dislocation networks inducing acicular ferrite had the better resistance to SSCC.

• 针状铁素体内高密度缠结的位错和碳氮化物在位错网络上的沉淀析出是针状铁素体钢具有优良的抗SSCC性能的主要原因。