Austenitic nickel-chromium-molybdenum-silicon alloy with...

Details Austenitic nickel-chromium-molybdenum-silicon alloy with... Austenitic nickel-chromium-molybdenum-silicon alloy with...

C - Chemistry, Metallurgy

22

C

C22C 19/05 (2006.01) B23K 35/30 (2006.01) F02B 3/06 (2006.01)

Patent

CA 2279294

The invention relates to an austenitic nickel-chromium-molybdenum-silicon alloy with a markedly improved resistance to the type of hot chlorine- containing gases and chlorides found, for example, in chemical plants, thermal waste-disposal facilities, the exhaust systems of cars and in diesel engines, consisting of: Cr 18-22 %; Mo 6-10 %; Si 0.6-1.7 %; C 0.002-0.05 %; Fe 1-5 %; Mn 0.05-0.5 %; Al 0.1-0.5 %; Ti 0.1-0.5 %; Mg 0.005-0.05 %; Ca 0.001-0.01 %; V max. 0.5; P max. 0.02 %; S max. 0.01 %; B 0.001-0.01; Cu max. 0.5; Co max. 1 %; Hf, Y, Zr and/or rare earth elements 0.02-0.5 %; and the remainder nickel and impurities caused by the melting process.

L'invention concerne un alliage nickel-chrome-molybdène-silicium austénitique à résistance à la corrosion nettement améliorée vis-à-vis des chlorures et des gaz chlorés à chaud, comme c'est le cas, par exemple, dans des installations de l'industrie chimique, des installations d'incinération d'ordures, des systèmes d'échappement de véhicules et dans des moteurs diesel, renfermant les éléments ci-après: Cr 18-22 %, Mo 6-10 %, Si 0,6-1,7 %, C 0,002-0,05 %, Fe 1-5 %, Mn 0,05-0,5 %, Al 0,1-0,5 %, Ti 0,1-0,5 %, Mg 0,005-0,05 %, Ca 0,001-0,01 %, V max. 0,5 %, P max. 0,02 %, S max. 0,01 %, B 0,001-0,01 %, Cu max. 0,5 %, Co max. 1 %, Hf, Y, Zr et/ou terres rares 0,02-0,5 %, le reste étant constitué par du nickel et des impuretés dues à la fusion.

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