Continuously cast large round blooms have gained widespread attention due to the improved quality, enhanced economy, higher yields, and lower operating costs obtained through continuous operation. Because the continuous casting (CC) process combines the cleanliness and radial solidification symmetry of the ingot casting process with the higher axial symmetry obtainable through bloom casting, it can deliver a more homogeneous product than conventional ingot casting. Herein, the shop floor manufacturing of a main shaft is discussed to confirm the feasibility of using continuously cast round bloom in the manufacture of heavy forgings. For comparison, the characteristics of a 1000 mm‐diameter continuously cast round bloom are assessed against those of a conventionally cast 20.6 ton ingot. To eliminate cavities at the centerline of the cylindrical bloom, additional studies on void closure efficiency at the center of the billet under various forging die geometries (e.g., flat, V, and round dies) are conducted, and the results reveal that the V‐die geometry is most effective in consolidating centerline voids. A comparison of the respective operational characteristics reveals that the round bloom CC method could be feasibly applied in the manufacture of main shafts.

中文翻译：

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在重型锻件制造中使用连续铸造圆坯代替铸锭的可行性

由于质量的提高，经济性的提高，产量的提高以及通过连续操作获得的较低的运营成本，连续铸造的大圆坯大方坯受到了广泛的关注。由于连续铸造（CC）工艺将钢锭铸造工艺的清洁度和径向凝固对称性与通过大方坯铸造获得的更高的轴向对称性相结合，因此与常规钢锭铸造相比，它可以提供更均匀的产品。在此，讨论主轴的车间制造以确认在重型锻件的制造中使用连续铸造圆坯的可行性。为了进行比较，将1000毫米直径的连铸圆坯的特性与传统的20.6吨铸锭的特性进行了评估。为了消除圆柱状坯料中心线的空洞，在各种锻模几何形状（例如，平模，V形和圆模）下，对坯料中心的空洞封闭效率进行了其他研究，结果表明，V-模具的几何形状对巩固中心线空隙最有效。通过比较各自的操作特性，可以发现圆坯CC法可在主轴的制造中可行地应用。