如何获得优质空心管坯使其能够满足在铸态下直接轧制的要求，是实现空心管坯连铸连轧，即管材近终形制造技术的关键。

To produce hollow tubes, which can satisfy the requirements of direct rolling in casting conditions, is the key to realize continuous casting-direct rolling of hollow tubes.

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连铸坯热送热装工艺分为热送装炉轧制和直接装炉轧制两种。

Hot delivery and hot charging technology of continuous casting slab includes two technologies: hot delivery and hot charging rolling, and direct charging rolling.

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