HSN²

Not for “Softies” – Hard, harder, HSN²

Improved surface qualities, shorter processing times, shorter door-to-door times – hard machining beyond the 50 HRc limit offers tremendous advantages for the machining vendor. HSN² is the response from CemeCon to these extreme requirements. Because only precision tools carrying this innovative coating material make reliable hard machining feasible. The new coating material is based on the second generation supernitrides from CemeCon thereby “degrading to softies” other coatings used in the past for hard machining.

Through hard machining of components tremendous saving potentials are utilised in production. In many cases it will be possible to machine components without the need for re-clamping these and time-consuming electrical discharge machining is avoided. Hard machining cuts production times and also tooling and cooling lubricant costs. The chips which are produced are free of any contamination. They may be directly recycled.

Hard machining is highly demanding regarding the tools and the coating. These are subjected, among other things, to high temperatures, cutting speeds of up to 250 m/min or extreme advance rates of 0.3 millimetres per turn, for example. The tools used must withstand these extreme conditions through a coating which is tailor-made in view of the specific application. The multilayer nano-composite HSN² used by Voha-Tosec is based on an entirely new development for hard machining and has all the prerequisites for attaining best results. Because it is extremely hard, smooth, temperature resistant, substantially free of residual stresses and chemically extremely stable.

The excellent results attained in practice speak for themselves. Carsten Klein, Managing Director of the tool manufacturer from Lindlar, Germany: “For many years now we are enjoying with CemeCon a close partnership-like relationship. Always when the need arises to find a special or even difficult solution, we can rely on the coating specialists. Hard machining, just as in the specific case of having to mill cold work steel 1.2767, is a good example of this”. Carbide corner radius milling cutters and as well as ball-head milling cutters coated with HSN² from Voha-Tosec do far better compared to tools coated with conventional hard coatings and even compared to special hard processing coatings of competitors. For example in the area of wear. Carsten Klein: “Our tool exhibits after 30 hours of use with 0.02 mm compared to 0.03 mm, respectively 0.05 mm significantly much less wear”.

For Voha-Tosec the conversion has paid off. Through tools coated with HSN² the company is now also on the safe side when it comes to hard machining: shorter processing times, reduced setup and handling times as well as higher quality, cut costs significantly in the end.

Source: FACTS 29 Seite 3