| Dormer's tools may be treated with a variety of surface treatments and coatings to better meet the demands for more economical machining and improved quality of machined surfaces. |
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SURFACE TREATMENTS |
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| Steam Tempering | | | Bronze Finish | |
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| Steam tempering gives a strongly adhering blue oxide surface that acts to retain cutting fl uid and prevent chip to tool welding, thereby counteracting the formation of a built-up edge. Steam tempering can be applied to any bright tool but is most effective on drills and taps. | | The bronze finish is a thin oxide layer formed on the tool surface and it is applied principally to Cobalt high speed steels. |
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| Nitriding | | | Hard Chromium Plating | |
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Nitriding is a process which is used to increase the hardness and wear resistance of the surface of a tool. It is particularly suitable for taps that are used on abrasive materials such as castings, bakelite, etc. Nitriding is used on twist drills when it is desirable to increase the strength and wear resistance of the cylindrical lands.
| | Hard chromium plating under specific conditions increases the surface hardness significantly, achieving values of up to 68Rc. It is especially suitable when tapping structural grade steels, carbon steels, Copper, Brass, etc. |
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SURFACE COATINGS |
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| TiAlN - X | | | Titanium Aluminium Nitride Coating (TiAlN)/Aluminium Titanium Nitride Coating (AlTiN) | |
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TiAlN – X is a Titanium Aluminium Nitride coating, which incorporates the latest developments in surface coating technology. The high aluminium content of the coating combined with nanometer layering techniques ensures a unique blend of high temperature resistance, hardness and toughness. This coating is ideal for milling cutters which are intended to run without coolant and when milling materials with high hardness.
| | Titanium Aluminium Nitride is a multi layer ceramic coating applied by PVD coating technology, which exhibits high toughness and oxidation stability. These properties make it ideal for higher speeds and feeds, whilst at the same time improving tool life. TiAlN is suitable for drilling and tapping. It is recommended to use TiAlN when machining dry.
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| Chromium Nitride Coating (CrN) | | | Super-R Coating | |
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| CrN is an excellent coating for aluminium alloys and low alloyed steel materials. CrN can also be used as an alternative on Titanium and Nickel alloys. This coating has a low tendency for built up edges. | | SUPER-R is a coating specific to the milling operation. It exhibits low internal stress, high toughness and wear resistance, whilst demonstrating excellent oxidation resistance, thanks to the high oxidation temperature of the coating.
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| Titanium Nitride Coating (TiN) | | | Zirconium Nitride Coating (ZrN) | |
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Titanium Nitride is a gold coloured ceramic coating applied by physical vapour deposition (PVD). High hardness combined with low friction properties ensure considerably longer tool life, or alternatively, better cutting performance from tools which have been coated. TiN coating is used mainly for drills and taps.
| | Zirconium Nitride is a ceramic coating applied by PVD coating technology. It exhibits a combination of properties which make it attractive when tapping Aluminium and Aluminium alloys.
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| Titanium Carbo Nitride Coating (TiCN) | | | Dialub (Diamond Like Coating) | |
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Titanium Carbo Nitride is a ceramic coating applied by PVD coating technology. TiCN is harder than TiN and has a lower coefficient of friction. Its hardness and toughness in combination with good wear resistance ensure that it finds its principal application in the field of milling to enhance the performance of milling cutters.
| | Dialub is an amorphous diamond coating with extremely low coefficient of friction and high hardness. This coating is specially developed for tapping in aluminium alloys with low Si-content |
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| Super G coating (AlCrN) | | | Super B Coating (TiAlN+WC/C) | |
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Super G is an aluminium chromium nitride coating mostly used for milling cutters. The coatings hot hardness and high oxidation resistance are two unique properties. When
machining applications involving heavy mechanical and thermal stresses, these properties translate into supreme wear resistance.
| | Super B with its multi-layer coating is used for tough machining operations and gives high reliability. Its low coeffi cient of friction and hardness makes it ideal for tapping in tough to machine materials and materials with long chips, for example, stainless steel. |
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| Diamond | | | | |
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| A polycrystalline diamond coating is specially adapted to the performance demands of graphite and non ferrous materials processing. The properties of the crystalline structure dramatically improve the wear coeffi cient and the hardness. The coating is only used for cemented carbide tools and especially for milling cutters. | | | |
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