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从五十年代初期,人们就致力于研究把连续浇注这一新工艺引进无缝钢管生产中。因为它既可以提高金属收得率和劳动效率,又能降低成本。为此,近三十年来,在国外各自结合本国的具体情况,进行了大量的研究工作,提出了许多工艺方案,发表了不少专利。总括起来可分为两大类,一是研究新型的管坯成型设备,以适应于目前工艺成熟大量应用于生产的连铸方坯,如意大利研究成功的压力穿孔机(p·p·m轧机);另一种方法是研究新型连铸坯料以适应现有穿孔机
From the early 1950s, people were devoted to studying the introduction of a new continuous pouring process into seamless steel pipe production. Because it can improve the metal yield and labor efficiency, but also reduce costs. To this end, in the recent three decades, each of them has done a great deal of research work in accordance with the specific conditions of its own country abroad, put forward many technological solutions and published many patents. To sum up can be divided into two categories, one is to study the new tube forming equipment to adapt to the current mature technology used in the production of large quantities of continuous casting billet, such as the Italian research success of the pressure piercing machine (p · p · m mill ); Another approach is to study new continuous casting blanks to accommodate existing piercing machines