This news article was originally written in Spanish. It has been automatically translated for your convenience. Reasonable efforts have been made to provide an accurate translation, however, no automated translation is perfect nor is it intended to replace a human translator. The original article in Spanish can be viewed at Herramientas de cerámica de alta velocidad

Have an useful life longer and can reach greater levels of productivity that the tools of hard metal

Tools of ceramics of high speed

Yoav Cerralbo, specialist of Marketing of Taegutec 03/04/2013

In general, the ceramics has a high hardness and a good resistance to the oxidation in comparison with any another material, having a high resistance to the fracture to high temperatures. Also it has a good reliability since it can bear a gradual increase of temperature and resistance to the mechanical crash above 1000 °C. However, it is relatively fragile to temperature acclimatise.

The oxide of aluminium (To the₂Or₃), has a resistance to the very good oxidation and an excellent life of tool in the mechanised continuous of high speed of metals to base of ironinging.

On the other hand, the nitride of silicon (If₃N₄) has a high resistance to the fracture and resistance to the oxidation. It is the best material for applications of desbaste in materials to base of ironinging. The tools of cut of ceramics have an useful life longer and can reach greater levels of productivity in comparison with tools of hard metal.

In the table 1 show the mechanical and thermal sensors properties of the different materials of the tools of cutting.

The best work for the tools of cut of ceramics

Know that the tools of cut of ceramics use to cut material extremely hard. The oxide of aluminium is good for the mechanised of continuous cut of ironinging melted and of the steel toughened. The nitride of silicon uses for applications of desbaste in smelting and for applications of finishing of high speed in alloys to base of Nickel.

1) Steel toughened

The tools of oxide of aluminium are adapted to mechanise steel toughened because of his excellent resistance to the oxidation and thermal sensors stability. Taegutec Has a range of qualities of oxide of aluminium based in a mix of ceramics for this type of applications. The quality AB30 has been developed for the mechanised of steel tempered in general, like the steel to the carbon and steel of low alloy (SCR, SCM). The AB20 is an excellent quality of steel of high alloy with big hardness. The TB650 (CBN) recommends for the mechanised of steel toughened. The schematic diagram of the figure 1 sample the qualities recommended of ceramics for several types of steels toughened.

The quality AB20 is adapted for the mechanised of steel of high hardness (CrMoNi) and steel for tools (SKD11) because of his high hardness and resistance to the oxidation.

It appears 1. This schematic diagram shows the qualities recommended of ceramics for several types of steels toughened.

2) Smelting

In general, the ceramic is the best tool of cut to mechanise smelting to high speed, because of his high hardness and resistance to the moderate fracture. The quality of ceramic AW20 is good for the continuous cut to high speed of smelting. Has an excellent resistance to the oxidation and thermal sensors stability in comparison with any another quality of ceramics. The Nitride of silicon to base of qualities of ceramics (ACE500 or ACE10) has a high resistance the fracture and a moderate hardness. For this reason, it recommends this material for applications of desbaste in smelting such as the turning of disks of brake and the milling of cylindrical blocks. The tools of ceramics provide a greater productivity and greater savings in the cost compared with the tools of carbide.

3) Súper-alloys

The ceramic is the ideal selection for speed of high cutting of exotic materials, especially the súper-alloys to base of Nickel. The material to mechanise uses widely for pieces of the aerospace industry and is very difficult to cut. The quality of Nitride of Silicon (ACE20) recommends for tornear to high speed and for the milling of Inconel 718. Has a high resistance to the fracture and a moderate thermal sensors stability.

Advantages to use tools of ceramics

As we already have mentioned, the qualities of ceramics have better physical properties that the others qualities. The physical properties of the qualities of ceramics of Taegutec perceive in the table 2. In this table shows that the qualities of nitride of silicon (ACE10 and ACE500) have greater resistance to the fracture, whereas the qualities to base of oxide of aluminium have a greater hardness. In the table 3 shows the comparison between the nitride of silicon and the tools of oxide of aluminium to base of ceramics. It shows that the nitride of silicon is more tenaz that the oxide of aluminium because of his microstructure lengthened, whereas the oxide of aluminium is harder because of his small hard grains. It is thus that recommends the quality ACE10 (or ACE500) for the desbaste of materials of ironinging melted, whereas the qualities AW20, AB20 and AB30 are adapted for the continuous cut of metals to base of ironinging.

In the table 2 shows that the qualities of nitride of silicon (ACE10 and ACE500) have greater resistance to the fracture.

In the table 3 shows the comparison between the nitride of silicon and the tools of oxide of aluminium to base of ceramics.

1) Mechanised of High Speed of shirts of cylinders

The quality of Taegutec AW20 (or the AW1030 – ceramic quality of oxide of aluminium with a layer recubierta of AlTiN), is a very good quality for the mechanised of high speed of shirts of cylinders. Has an excellent resistance to the wear and a greater life of the tool that any another quality of ceramics. An example of the success of this application shows in the figure 2. The life of the tool of the AW1030 is almost the double that the competition, the quality To1. The quality of Taegutec AW1030 is a pure quality of oxide of aluminium with a layer of coating PVD TiAlN and with a special treatment of the edge of cutting. The excellent life of the tool comes from of a combination of his quality and manufacturing of the edge of cutting. It is protected by the patent PCT, PCT/KR06/05707.

It appears 2. The quality of Taegutec AW20 (or the AW1030 – ceramic quality of oxide of aluminium with a layer recubierta of AlTiN), is a very good quality for the mechanised of high speed of shirts of cylinders.

2) Mechanised of disks of brake

Recently have developed the new quality SiAlON (ACE500) for the mechanised of high speed of the disks of brake. Has a high hardness and high resistance to the fracture because of his alloy, designed especially with technology of sintering. It has a strong reliability thanks to the big number of proofs realised in the global market. The figure 3 sample the patterns of wear of the plaquitas of ceramics after mechanising the disks of brake. The quality ACE500 has a life of the tool 30% longer that the tool of the competition with the same conditions of wear of the flank.

The long life of the tool is due to his double phase alpha / beta microstructure SiAlON. The phase Alpha SiAlON contributes to the high resistance to the wear and the phase beta contributes to increase the resistance to the fracture. Mechanising disks of brake can guarantee greater productivity that any another tool.

The figure 3 sample the patterns of wear of the plaquitas of ceramics after mechanising the disks of brake.

3) Rollers of steel

The tools of cut of ceramics are a good election for mechanised weighed of rollers of steel with high hardness, especially, fast steel, steel cromado, rollers of Nickel and rollers adamite. The quality ACE500 recommends for applications of desbaste, whereas the AB20 recommends , in turning, for finishing of rollers extremely hard. The example of turning of desbaste of roller adamite shows in the figure 4. In this shows that the quality of Taegutec ACE500 has an useful life of 40% more than the quality of the competition (WITHOUT) in the Korean market. The result of the proof of turning in finishing shows in the figure 5. The quality AB20 has an excellent life of the tool in applications of finishing of rollers of steel to high speed.

It appears 4. Turning in desbaste of rollers of adamite (HS50), 313 mm of diameter, RPM=51 / V= 50 m/mm, f= 0,50 mm/rev, DOC=26 mm, plaquita without refrigeration: LNU6688T, ACE500 (Taegutec), S1 (competitor).

It appears 5. Turning in finishing of rollers of fast steel (HS85), diameter of 610 mm, RPM=25 / V= 48 m/min, f= 0,32 mm/rev, DOC= 4,3 mm, plaquita without refrigeration: T11-3219, AB20 (Taegutec), C1 (competitor).

Conclusion

Taegutec Produces tools of cut of only ceramics and of high quality for diverse applications such as the mechanised of high speed of shirts of cylinders, and for rollers of steel. The quality ACE500 of SiAlON has developed for the mechanised of high speed of the disks of brake and for desbaste of rollers of steel. The quality AW1030 with coating PVD is an excellent quality for the continuous cut of pieces of grey ironinging and graphite compacted. Whereas the quality AB2010 recubierta in PVD has a life of the longest tool that the tools of mixed ceramics of the competition in the mechanised of temperate steel.

Taegutec Encourages for supplying tools of only ceramics that serve to increase the productivity and diminish the costs of production of our customers.