SA-05-4(055) A NEW AUSTENITIC TUBE ALLOY CONTAINING 9% MOLYBDENUM RESISTANT TO FIRESIDE CORROSION IN WASTE INCINERATORS(Waste Incinerator)

概要

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A 22%Cr-52%Ni-9%Mo-0.8%Nb alloy was developed for superheater tube application in Waste-to-Energy plants. This tube alloy was designed to improve thermal stability of Alloy 625 at 600-650℃ while maintaining the excellent high-temperature corrosion resistance of alloy 625 in waste incinerators. Laboratory corrosion tests revealed that iron content of 3-20 mass% Fe did not alter the corrosion resistance of high-Ni high-Mo alloys. The developed alloy had an equivalent corrosion resistance to alloy 625 in waste incinerator corrosion environment. The Gleeble test, tensile test, creep rupture test up to 10^4 h, and Charpy impact test for aged materials upon aging were performed for this alloy ; test results showed that this alloy can be used as boiler tubes up to 650℃. Test results of the tube alloy produced by conventional tube manufacturing processes were demonstrated as well.
一般社団法人日本機械学会の論文
2001-06-03