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一、序言1949年,美国建造了世界上第一套无缝管连轧机,首次生产经验表明,这种轧机与已有的生产中小型管径的无缝管轧机相比,其优越性是增加了钢管的长度,提高了管子的尺寸精度和轧机的生产能力。70年代广泛采用了这种连轧机生产碳素钢和低合金钢的无缝钢管(表1)。美国第一套钢管连轧机可生产φ50～114毫米的管子。1959年美国又投产了第二台φ25～89毫米连轧机。1961年和1964年意大利的伊纳森蒂(Innocenti)公司建造了两台管径分别为φ16～60毫米和φ16～90毫米的连轧机。
I. Preface In 1949, the United States built the world’s first seamless tube continuous rolling mill. The first production experience shows that this kind of rolling mill is superior to the existing seamless tube mill for producing medium and small diameter pipes The length of the steel pipe increases the dimensional accuracy of the pipe and the productivity of the mill. In the 1970s, this continuous rolling mill was used to produce carbon steel and low-alloy steel seamless tubes (Table 1). The first tube rolling mill in the United States produces φ50 to 114 mm tubes. In 1959 the United States put into operation a second φ25 ~ 89 mm mill. In 1961 and 1964, Innocenti of Italy built two continuous rolling mills with diameters of φ16-60 mm and φ16-90 mm respectively.