WNT’s HCF3120 Dragonskin offers improved cast iron turning tool life
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WNT's HCF3120 addition to its Dragonskin range is suitable as an insert for both rough and finish turning on cast iron materials. Its combination of hard and tough carbide substrate, along with a novel CVD coating significantly extends tool life, says the company.
HCF3120's coating technology ensures a secure bond between the alumina coating to the carbide substrate. In addition, it also allows for a much thinner, 16 micron, coating to be applied. Beneath the coating is an integrated substrate composed of hard and tough layers, that lends itself to good performance in most cast iron machining applications, and especially where intermittent cutting or machine stability are issues, explains WNT.
In examples cited by WNT one customer machines GGG90 nodular cast iron crankshaft with a heavily interrupted cut. The surface speed using HCF3120 was 375 m/min at a feedrate of 0.22 mm/rev feed and 4 mm depth of cut. Total length of cut is 1,000 mm (per crankshaft) over five passes with tool life coming out at four components per edge.
Another customer machining pump bodies in GG25 cast iron with interrupted cut is achieving a surface speed of 280 m/min at a feedrate of 0.3 mm/rev feed and 2 mm depth of cut. Total length of cut is 150 mm (per pump body) over two passes with a tool life of 100 parts per edge.
