宝钢钢管全浮动芯棒连轧工艺的技术进步

全浮动芯棒连轧管生产线工艺的突出问题是钢管存在“竹节”现象和壁厚均匀度差。围绕提高钢管壁厚均匀度和消除“竹节”现象,进行持续的工艺技术改进,通过改善芯棒润滑条件,自主开发张力减径机非传统孔型,开发大规格孔型和高铬钢产品,提高生产线工艺自动控制水平等,使该生产线继续发挥能力,为用户提供高精度、高钢级的产品。

Technical Development of Full-floating Mandrel Mill Process of Baosteel Tube Plant

Addressing the main problems of the full-floating mandrel mill operation line located at the facili- ty of Baosteel tube plant,i.e.,“bulging”and poor wall thickness uniformity of the tube,effective measures have been taken to eliminate the said defects,including improvement of mandrel lubrication conditions,self-devel- oped non-conventional grooves of the stretch reducing mill,development of large-sized grooves and expansion of hi-chromium steel product lines,improvement of the automatic process control level of the mill line as well as continual technological modification,etc. As a result the capacity of the said mandrel mill line has been well tapped to produce hi-precision and hi-grade steel tubular products for the customers.