我国特大直径热轧无缝钢管品种和装备的发展历程

Development History of Types of and Manufacturing Equipment for Domestic Ultra Large-sized Hot-rolled Seamless Steel Tube

简要介绍了我国特大直径热轧无缝钢管品种和装备的发展历程,分析了特大直径热轧无缝钢管的生产工艺特点。认为,挤压管机组可以生产包括碳钢管、合金钢管、不锈钢管、高温合金管和耐蚀合金管等品种,但生产成本高;二辊斜轧管机组可生产碳钢管、合金钢管,且生产效率高,壁厚精度高,但对于高合金钢、不锈钢、高温合金和耐蚀合金钢管的生产存在困难;周期轧管机组比斜轧管机组适应的钢管品种范围更宽,轧制时的变形量更大,但尺寸精度低。提出了各类特大直径热轧无缝钢管生产机组的供坯方案。

Described here in the paper is the development history of the types of and the manufacturing equipment for the domestic ultra large-sized hot-rolled seamless steel tube.Also analyzed are the characteristics of the manufacturing process of the said tube.It is regarded that although the extrusion mill is capable of producing the carbon steel tube,the alloy steel tube,the stainless steel tube,the hi-temperature alloy steel tube and the corrosion-resistant alloy steel tubes,the production costs are rather high;the 2-roll rotary rolling mill is capable of producing the carbon steel tube,and the alloy steel tube with high productivity and high product accuracy,however certain difficulties stay with such mill in case of rolling tubes of hi-alloy steel,stainless steel,hi-temperature alloy steel and corrosion-resistant alloy steel;and compared with the rotary rolling mill,the pilger mill is suitable for a rather wider steel tube type range,and features bigger rolling deformation,but the product accuracy is rather low.Accordingly,the billet-supply solutions for different rolling mills to make the ultra large-sized hot-rolled seamless steel tube is proposed.