Product category:
Milling cutters
News Release from: Oerlikon Balzers Coating | Subject: Dual-layer PVD coating - hard milling
Edited by the Manufacturingtalk Editorial
Team on 17 September 2007
Coatings improve cutting of 64+ HRC
steels
A dual-layer PVD coating allows the cost-effective hard milling of moulds and dies by preventing the cutting heat from penetrating into the tool and keeping it in the chip.
When cutting steels with a hardness of 60 HRC and more, the cutting edges of the tools are subject to particularly high stresses The reason is that the chips of hard metals like these are no longer cut but instead compressed and broken off under severe heat and force conditions
This article was originally published on Manufacturingtalk on 24 Feb 2005 at 8.00am (UK)
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PVD ups metalcutting and bending performances
For metalcutting applications PVD-based coating ups metalcutting performance, while PVD coatings have also increased bending tool life from 1000 parts produced to 225,000.
A new PVD coating makes it possible to cost-effectively hard-mill moulds and dies under such circumstances, said Oerlikon Balzers..
At EMO 2007, Oerlikon Balzers will present this high-performance coating under the Balinit Aldura brand.
It represents the successful synthesis of two proven high-performance coatings in one innovative dual-layer system with optimised characteristics.
A perfectly adapted TiAlN base coating ensures excellent adhesion and affords great mechanical strength.
The nanocrystalline AlCrN-based coating system applied over it features excellent hot hardness, resistance to oxidation, and thermal insulation properties.
The unique features of this coating prevent the cutting heat from penetrating into the tool, instead keeping it where it best supports the machining process: in the chip.
Solid carbide end mills coated with Balinit Aldura can fully machine heat-treated, hardened steels with 60 HRC and more while decisively reducing not only costs but also throughput times in tool and die engineering.
In roughing and finishing processes, they convincingly demonstrate extraordinary wear resistance, extreme mechanical strength, and excellent edge durability.
Better cutting parameters, longer service lives, and controlled cutting processes assure enhanced productivity and manufacturing reliability.
At the same time, the dimensional accuracy and surface quality of workpieces are improved to such a degree that retouching and reworking become superfluous.
* Oerlikon Balzers Coatings at EMO 2007, Hannover, Germany, September 17-22, Hall 3, Stand D24.
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