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冶金专家解说钛合金:

这些材料的低导热性不允许加工过程中产生的热量被断屑带走，

钛合金的高加工硬化倾向也可能导致高切削力和高切削温度，从而导致切削刃在切削深度处的破损。

Alpha-Beta（α-ß）钛合金

这些合金同时具有α和ß相，并同时含有a和ß稳定剂。

这个组群中最简单和最受欢迎的合金是Ti6Al4V，主要用于航空航天工业。 这类合金易于成型，并具有较高的室温强度和适度的高温强度。 这些合金的性能可以通过热处理来改变。

Beta（ß）钛合金

Beta（ß）合金包含过渡金属，例如V，Nb，Ta和Mo，可稳定ß相。 商业ß合金主要包括Ti11.5Mo6Zr4.5Sn，Ti15V3Cr3Al3Sn和Ti5553。 Beta合金易于热处理，通常可焊接且具有高强度。 在固溶处理条件下，具有出色的可预期可成型性。 但是，ß合金易于延性-脆性转变，因此不适合低温应用。 Beta合金在板材，厚型材，紧固件和弹簧应用中具有良好的组合或性能。

挑战:

钛合金的高化学反应性导致了切屑与刀具的黏连，导致了断屑槽和刀具的过早失效。

此外，切屑与刀具接触面积相对较小，由于较高的切削力和温度导致刀具过早失效，从而导致较大的应力集中。

以前所未有的效率加工航空关键部件（发动机回转件）需要可靠、高精度的工具进行半精加工和精加工车削。

为避免加工过程中对零件造成任何损坏，为保证加工工艺安全，需要采用先进的断屑器技术。

对工具解决方案的要求：

  • 刀具刚性/稳定性
  • 热量管理
  • 冷却液流量
  • 韧性等级
  • 耐热涂层
  • 耐化学腐蚀涂层
  • 切削轻快
  • 高金属去除率

刀具类型

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