Cutting Tools used in Computer Numeric Control Machining – All details
Cutting Tool Materials ;
1. High Carbon Steel
2. High Speed Steel (HSS)
3. Cast Alloy
4. Cemented Carbide
5. Ceramics
6. Sialon
7. Diamond
8. Carbon Boron Nitride (CBN)
- High Carbon Steel ;
- Hardness of tool is determined by the carbon content which ranges from 0.65 to 1.5 %
- More carbon content = More wear resistance.
- Ex – Hand Tools, Hack Saw Blades, Milling Cutters,Reamer, Form Tools, Punching
- Cutting Speed for High Carbon Steel Tool – 15 to 18m/min
2. HSS
- HSS Tools used in Shell End Mill, End Mill, Reamer, Center Drill (C.D.)
- Mainly of 2 types – High Tungsten (T type), High Molybdenum ( M type)
3. Super High Speed Steel
4. Cast Alloy (Stellites)
- Alloy of Chromium, Tungsten and Cobalt.
- Non ferrous material alloys high in cobalt have been developed for cutting tool.
- Cobalt – 40 to 50 %
- Chromium – 27 to 32 %.
- Stellites are harder than HSS at 500 Deg. Celcius.
- Stellites Retain hardness at 750 Deg. Celcius.
5. Cemented Carbides (Carbide)
- Produced by Sintering process
Sintering is a process of prolonged heating of carbides of
1. Tungsten
2. Titanium
3. Tantanum
4. Cobalt
with certain % of binding material (cobalt) at 1980 degree temperature and 15-20 psi presssure.
Cemented Carbides componenets;
- Titanium Carbide – 0 to 16%
- Tantanum Carbide – 0 to 10%
- Tungsten Carbide – 82%
- Cobalt – 3 to 16%
Read more about Carbides, Cermets, Ceramics and Carbon Boron Nitride (CBN)
