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- W2201004725 abstract "HR3C steel(Fe-25Cr-20Ni-Nb-N)is a new type of austenitic heat-resistant steel which has been widely used for super-heater and re-heater tubes in the ultra supercritical pressure (USC)boiler.The mechanical properties of HR3C steel were dependent on the stability of the microstructure, particularly the large amount of precipitates formed during service.This work was focused on the change of microstructure and the precipitations of HR3C steel after thermal aging for 500 h at 750℃.The results indicated that the major precipitates were variform M_(23)C_6 carbides and NbCrN nitrides.M_(23)C_6 carbides precipitated on grain boundaries and in intragranular.Fine and dispersed NbCrN nitrides were found to precipitate in intragranular.The hardness of HR3C steel had been improved through dispersed M_(23)C_6 and fine NbCrN precipitates after thermal aging for 500 h at 750℃.All the M_(23)C_6 carbides,with lattice parameter of three times of the austenite matrix,grown in a cube to cube orientation relationship with the matrix.Some of the M_(23)C_6 carbides which precipitated on grain boundaries were transformed intoσphase." @default.
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- W2201004725 date "2010-07-11" @default.
- W2201004725 modified "2023-09-25" @default.
- W2201004725 title "PRECIPITATES IN HR3C STEEL AGED AT HIGH TEMPERATURE" @default.
- W2201004725 cites W1981342032 @default.
- W2201004725 doi "https://doi.org/10.3724/sp.j.1037.2010.00037" @default.
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