Inner Mongolia Baotou Steel Pipe Co., Ltd. owns the world's advanced production unit of seamless steel pipe as well as the main products are various hot rolled seamless steel pipes and piercing plug, the hot tool matched with piercing process of several hot rolling production lines are manufactured by the company itself. The causal chain analysis is carried out aiming at the existing problem of low yield for casting piercing plug. The process of casting system for piercing plug is optimized through taking such scheme as increasing the porous sand core of riser manufactured by exothermic materials, installing weighing device and injection of nitrogen at the bottom of moulding flask so that the above technical problem is solved.

piercing plug  /  casting  /  process optimization  /  riser