我国生产无缝钢管用的圆坯,都是由钢锭经过二次开坯轧成或锻成,如果能使用由钢水直接铸成的圆坯,其价值是显而易见的。鞍钢钢研所和无缝钢管厂在大连机车厂和东北工学院协作下,大胆利用生产球铁曲轴的低压铸造设备,试铸成中碳钢实心圆坯,并进行了穿孔试轧,已先后穿成φ40毫米和φ135毫米荒管。这种低压铸造的圆坯由于采用石墨铸型、在压力下浇注和结晶,使铸坯组 China’s production of seamless steel pipe with round billet, are from the ingot through the second bloom into or forging, if you can use the direct casting from molten steel round billet, the value is obvious. Anshan Iron and Steel Institute and the seamless steel pipe plant in Dalian Locomotive Works and Northeast Institute of Technology in collaboration with the bold use of the production of ductile iron crankshaft low-pressure casting equipment, test-cast into a solid carbon steel round billet, and the pilot perforated, has Dressed into φ40 mm and φ135 mm shortage tube. This low-pressure casting round billet as a result of graphite mold casting and crystallization under pressure so that the billet group