Fracture of Carbide Tools in Intermittent Cutting

  • H. Chandrasekaran


Resistance to wear and requisite strength against plastic deformation and fracture are the two fundamental requirements of metal cutting tools. The progressive development of the cemented carbide tools which has been quite impressive in the aspect of wear resistance in particular, still leaves their fracture behaviour in intermittent cutting to possible improvement. Thus for example while the current coated carbides have increased the tool life appreciably their transverse reupture strength has reduced. Modern tool carbides are far more homogeneous and free from porosity but then their service loads have also increased. Moreover, there is a great need for enhancing not only the available strength further, but acquire the ability to predict tool fracture during machining. The situation is acute specifically in the area of modern automated machining systems. It is lack of this capability which has led to the choice of high speed steels, with their relatively poor but predictable high temperature performance both In terms of tool wear and fracture in a number of multipoint intermittent cutting situations. Keeping this in mind it is proposed to consider in the present article the mechanism of tool failure with particular reference to fracture in Intermittent cutting so as to identify its poor predictability.


Fracture Behaviour Cutting Tool Thermal Fatigue Fracture Initiation Carbide Tool 
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Copyright information

© Plenum Press, New York 1983

Authors and Affiliations

  • H. Chandrasekaran
    • 1
  1. 1.Swedish Institute for Metals ResearchStockholmSweden

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