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Super alloys - HRSA and titanium alloys (ISO S) This group contains Super alloys based on heat-resistant iron, on nic- kel and cobalt (HRSA) and on titanium alloys. • The super alloys have a high resistance to corrosion and this allows to maintain their hardness and resistance to high temperatures (up to 1000 ° C). The nickel-based version is the most widely used. Among the precipi- tation hardening materials we find: Inconel, Waspalloy, Udimet. Among the hardened materials for solubilization (not hardenable) we find Inconel 625. The materials based on iron are derived from the austenitic stainless steels and are those that have a weak resistance to heat. The workability is improved in the case of alloys based on iron and is lower in the case of alloys based on nickel and cobalt based. As these materials have a high resistance to high temperatures during processing are produced segmented chip. The cutting force can vary from 2400-3100 N/mm ². The considerable resistance, the tendency to strain hardening and har- dening cause the phenomena of adhesion wear of the cutting edge. • The titanium and its alloys have a poor workability compared to ge- neric type steels and stainless steels. Titanium has a low thermal conductivity; it keeps its strength at high temperatures, which generates high cutting forces and heat in corre- spondence of the cutting edge. The chips produced during machining are thin and very fragmented, with a tendency to excoriate the machined surface and generate shear forces close to the cutting edge. The cutting force can vary from 1300-1400 N/mm ².
ISO Gr. Esempio/Example
W.-Nr
AISI/SAE
TiCu2 Ti4 TiAl6V6Sn2 TiAl3V2.5
3.7124 3.7065 3.7174 3.7195 3.7144 3.7165 3.7110 3.7184 3.7154
R507000
3
S
R54620 R56400
TiAl6Sn2Zr4Mo2 TiAl6V4 TiAl5Fe2,5 TiAl4Mo4Sn2 TiAl6Zr5 Ti6Al2Sn4Zr6Mo
4
332
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