Some basics of cutting with ceramics

There are some basics when it comes to applying ceramic cutting materials into a metal working process that needs to be considered. Our ceramics, CS100 and CW100, are designed to be used for roughing of heat resistant super alloys, HRSA, and to be successful in applying them, these basics needs to be addressed to get the maximum tool life.

For example, always use a radial path with a radius bigger than the inserts radius when machining into a shoulder to avoid breakage. The feed should also be reduced to about 50 % when machining into the corner.

Ceramics tend to get big notch wear and to maximize the tool life, two very important techniques for roughing can be used. By varying the depth of cut when several passes are needed, the notch wear can be spread out on a bigger part of the cutting edge and the tool life can be heavily increased. Start with the biggest depth of cut and decrease the depth for every pass and keep the depth of cut constant during each pass. The other technique for spreading out the notch wear is ramping. It means that the depth of cut is varied during each pass, starting the first cut with a big depth of cut and decreases it. The next cut is started with a low depth of cut and is increased during the whole cut.

These are just some tips and tricks when machining with ceramics to avoid some easy mistakes.

For more information, please contact your local Seco representative, or our Advanced material (PCBN/PCD/CERAMIC) team.

Stefan G Larsson
737 82 Fagersta, Sweden
Office +4622340572
Mobile +46761367807

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