《Incoloy alloy DS》.pdf

wwwwww..ssppeecciiaallmmeettaallss..ccoomm INCOLOY® alloy DS (W. Nr. 1.4862), first developed tial oxidation of the depleted chromium matrix fol- for woven wire furnace conveyor belts, is now widely lows, a form distinct from ordinary oxidation used for a range of heat-treatment applications where its which produces a passive oxide film. strength and corrosion resistance at high temperatures INCOLOY alloy DS is also resistant to ‘sigma’ enable its use in light section. phase, a hard, brittle, complex intermetallic com- Alloys for use in high-temperature processes must be pound, basically iron-chromium, which precipi- able to withstand exposure to hot combustion gases and tates in the 600-900°C range from structures that operating atmospheres for a considerable period of time are either ferritic, mixed ferrite and austenite, or without the loss of effective section that can be caused marginally austenitic. Nickel, an austenite former, by corrosion. suppresses the tendency to ‘sigma’ phase formation INCOLOY alloy DS, in common with other Special and INCOLOY alloy DS, with a nominal 37% Metals Corporation heat-resisting alloys, develops a nickel content, may be heated indefinitely within tightly adherent oxide film that protects its surface the 600-900°C range without fear of ‘sigma’ phase against corrosion processes. It is also resistant to ‘green embrit