40MN锆挤压机挤压工艺研究

Study on extrusion process of zirconium alloy

锆合金因其变形抗力大、流动性差、粘性强等特性，锆合金挤压过程中对挤压比、工模具形状、挤压速度、加热温度、润滑工艺等都有严格的要求。某40 MN 双动锆挤压机组生产某牌号核级锆材，采用专用润滑剂涂层润滑，坯锭的加热温度偏差控制在30℃左右，保温时间控制在10 min左右，采用扩孔挤压，扩孔速度控制在5～10 mm／s，挤压速度3～5 mm／s。达到锆合金挤压的最佳效果。

Zirconium alloy has properties of large deformation resistance,poor mobility,and strong viscosity. It leads strict requirements of extrusion ratio,mold shape,extrusion speed,heating temperature,and lubrication process.A 40 MN double-action zirconium extrusion is used to produce a grade of nuclear zirconium.Special lubricant is used for coating lubrication,heating temperature deviation of billet is controlled in about 30℃, holding time is controlled in about 10 min,reaming extrusion is selected,reaming speed is 5 ~10 mm/s,and extrusion speed is 5 ~10 mm/s.Precise result can be obtained in zirconium alloy extruding.