Test shows that the embrittlement temperature will increase with increase of the Si content.

In order to obtain satisfactory engineering properties for the duplex stainless steels, long period stop at the embrittlement temperature range should be avoided during production and fabrication.

To the embrittlement phenomenon of steam turbine rotor, this thesis calculated 300mw steam turbine rotor's transient temperature field of cold start-up using FEA method.