采用水冷铜模薄带铸造方法研究了熔体过热对AISI 304不锈钢亚快速凝固薄带组织的影响.结果表明:AISI 304不锈钢亚快速凝固薄带由外层的胞状奥氏体组织、次外层的柱状铁素体枝晶组织和中心的等轴铁素体枝晶组织组成;随着熔体过热度增加,奥氏体胞晶间距和柱状铁素体二次枝晶间距随之增加,残余铁素体含量亦降低.过热度的增加降低了熔体过冷度和冷却速率,造成薄带凝固组织中枝晶间距的增加和残余铁素体含量的降低.
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