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Analysis of advantages and disadvantages of PCD milling cutter

金刚石刀具厂家介绍PCD铣刀优点: 
  1.PCD铣刀的弹性模量大,
  2.断裂强度高(比氧化铝高3倍),
  3.切削刃钝圆半径值可以磨的很小,不容易断裂,
  4.能长期保持切削刃的锋利程度:PCD铣刀的热膨胀系数小,热变型小。
  金刚石刀具厂家介绍PCD铣刀缺点:PCD及人造聚晶金刚石复合(PCD)刀具的刃口锋利性和加工的工件表面质量低于ND,同时其可加工性很差,磨削比小,难以根据刀头的几何形状任意成型。因此目前利用人造聚晶金刚石复合片只能制备车刀,至今还不能制造带断屑槽的可转位刀片和复杂三维曲面几和形状成的铣刀。又由于金刚石焊接过程工艺复杂,CVD金刚石厚膜(TDF)焊接刀具也尚未大批量使用。此外,金刚石不是碳的稳定状态,遇热易氧化和石墨化,开始氧化的温度为900-1000K,风冷或进行酒精喷雾冷却务使刀尖温度下至650°以下。金刚石刀具厂家介绍同时,由于金刚石是由碳原子组成的,它与铁族元素的亲和力大,故不能用PCD铣刀切削钢铁材料。
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