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904L超级奥氏体不锈钢铸锭枝晶偏析处理方法

该发明聚焦于一种快速消除904L超级奥氏体不锈钢铸锭枝晶偏析的处理方式。其工艺涵盖连铸热装红送、高温质化锻造、回炉出炉等环节。

对于904L超级奥氏体不锈钢铸锭的化学成分，有着严格质量百分比控制：C含量需≤0.015％；Si≤1.00％ ；Mn≤2.00％ ；P≤0.045％ ；S≤0.035％ 。Cr含量范围在19.00％～23.00％ ；Ni为23.00％～28.00％ ；Mo处于4.0％～5.0％ ；N≤0.3％ ；Cu为1.00％～2.00％ ；Co≤0.50％ ；Al≤0.010％ ；Ti≤0.020％ ；Ca≤0.020％ ；O≤70ppm，剩余部分为铁及不可避免的杂质。

此发明具备重要意义。它能够快速地消除904L超级奥氏..大幅度缩短超级奥氏体不锈钢高温均质化所需时间。同时，还能有效避免因长时间高温停留，致使铸锭组织变得粗大以及表面出现氧化等问题。进而对904L超奥不锈钢的热加工性能加以改善，提高生产效率与成材率，降低生产成本。

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