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Ceramic coated inserts turn steels at 300m/min
A
LMT Fette product story
Edited by the Manufacturingtalk editorial team
Aug 13, 2007
As well as enabling a CNC lathe to turn steels at cutting speeds up to 300m/min, nano-crystalline TiCN ceramic coated inserts offer a longer tool life - up to 50% - compared with coated inserts.
The Boehlerit carbide division of LMT Fette has developed a nano-crystalline TiCN yellow coloured ceramic coating that enables its Steeltec LC225 indexable turning insert to run at cutting speeds in excess of 300 m/min on steel.
The coating has also extended a tool life by up to 50% greater when compared with conventional coated turning insert, said LMT.
The nano-crystalline TiCN ceramic coated inserts are one of a whole series of high performance tooling and toolholding developments that LMT Fette plan to launch at EMO 2007.
The new products include the following.
* Turning super alloys - turning insert, specially formulated for machining super alloys at rates up to 20% faster.
* Drilling aluminium and composites - a new range of diamond-coated solid carbide drills for composite and aluminium materials giving vastly improved economies over the more traditional polycrystalline diamond (PCD) tools.
* Micro cutting - micro cutting tools from its Onsrud division in America will be available in three different lengths from 0.2mm diameter.
All the tooling is designed to significantly increase productivity for which the world patented Steeltec LC225K turning insert is a prime example, having a totally new method of manufacture.
The fabricated composite layer consists of nano-crystalline TiCN with a yellow coating to provide highly visual indication of any signs of wear.
Gradient carbide, enriched with cobalt is used to promote stability under cut and decrease any likelihood of micro-breakage while the fine, needle structure of the Nanolock bonding layer significantly improves heat dissipation when machining dry.
The Drytec surface coating on the insert is ground after coating and because the insert is ultra-smooth, formation of any built-up-edge under cutting conditions is reduced.
The introduction of the Boehlerit Supertec lathe tool range, focusing on the LC 4052 fine grain carbide insert, will demonstrate the influence of a special heat-resistant carbide substrate which has a nano-crystalline nitride layer.
As a result, cutting speeds when machining super alloys such as Inconel, Hastelloy, Waspaloy and titanium can be increased by up to 20%.
In addition, the new diamond-coated solid carbide drill range has been developed for composite machining with geometry that prevents splintering or laceration of lower and upper coating layers that form the material.
* LMT Fette at EMO 2007, Hannover, Germany, September 17-22, Hall 4, Stand D54.
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