Nickel-chromium-based metal alloys are classified as corrosion- and oxidation-resistant materials. In addition, they are ideally suited for use in extreme conditions, where high temperatures, pressures do not pose a threat. This is why they are used in a wide range of industries, from aviation to mining, oil and gas. Unfortunately, the machining of nickel and chromium alloys is not easy. During the production of components based on these alloys, we face many problems that we have to deal with.
Nickel and chrome alloy machining – basic problems.
The main problem with machining these materials is the generation of huge amounts of heat at the edge of the cutting insert. Essentially, this is the result of the chemical composition of the material in question affecting the occurrence of friction. This causes significantly more wear (including chipping) on the cutting edge of the tools. Thus, tool life decreases drastically even in the case of a low-speed cutting process with longer downtime. Another major problem that arises in the machining of nickel and chromium alloys is their tendency to form poorly due to their sensitivity to metallurgical stresses and self-hardening effects during machining.
Ways to machine effectively and efficiently.
To be able to overcome the problems associated with effective machining of nickel and chrome alloys, our company uses cutting tools coated with a special PVD TiAIN coating applied in a special way by the tool manufacturer. The appropriate design allows for greater tool reliability and tool life, including increased resistance to peeling and chipping of the coating. An additional characteristic of a modern cutting tool for stainless alloys is its design, which allows the chip generated during cutting to be broken appropriately. All this allows for uncompromising cutting processes, thereby reducing overall machining costs. While standard cutting tools allow an average cutting speed Vc of 25 to 30 m/min, specialised tools enable cutting speeds of up to 80 m/min to be achieved, thereby significantly increasing turning or milling productivity. Of course, without any deterioration in machining quality.
For more information on the possibility of machining nickel and chrome alloys, please call our production department at produkcja@conmatec.pl. We look forward to working with you.