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一、前言生产中等直径的无缝钢管时,直接使用连铸方坯,可以达到降低原料成本,大大提高产品尺寸精度和表面质量的目的。压力穿孔法在工业上的应用促使了一种新的无缝钢管生产法的实际应用。这项技术的发展过程大致如下:1972年至1974年对使用连铸方坯的穿孔法进行了工业性研究,并在新日铁方法的基础上,经过技术改进,将其成功地发展成实用的压力穿孔法。1974年后,根据料轧原理,研制成将压力穿孔法和自动轧管法相结合的新的无缝
First, the preface Production of medium-diameter seamless steel pipe, the direct use of continuous casting billet, can reduce the cost of raw materials, greatly improving product size accuracy and surface quality purposes. The application of pressure perforation method in industry has promoted the practical application of a new method of seamless steel tube production. The development of this technique is broadly as follows: From 1972 to 1974, the perforation method using continuous casting billets was studied industrially. Based on the Nippon Steel method, it was successfully developed into a practical Pressure piercing method. After 1974, according to the principle of material rolling, it developed a new seamless combination of pressure piercing method and automatic tube rolling method