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Firepower and waterpower electricity making
1. Firepower electricity making
In order to promote the thermal efficiency of the boiler in heat engine plant,
enlarging the equipments and increasing the temperature and pressure for the
steam condition are the certain developing direction. Presently, the
subcritical and supercritical boiler are industrialized, the applied material
for superheat steel pipe can no longer satisfy the requirements, and austenite
stainless steel with good hot strength like the 0Cr18Ni10Ti and 0Cr17Ni12Mo2
shall be regarded as new materials.
2. Waterpower electricity making
The impeller of water turbine for Waterpower is usually made of stainless
steel, in the early days the casting form were mostly used, as the water
turbine developed toward big capacity and high fall, in order to improve the
performance of the impeller, now forged products are in use, and the steel type
has changed from the Cr13 type in early days to the 00Cr13Ni5Mo steel with good
welding quality, and the use of stainless steel for water turbine impeller is
shown in the following table. Besides, some anti-corrosion and anti-abrasion
components in waterpower plant have been successfully used the 0Cr18Ni9N (304N)
and 2205 double phase steel clad plate.
The application of stainless steel in water turbine impeller
Form of water turbine |
Power , MW |
Impeller diameter , mm |
Material |
French type |
70 |
2480 2500
2630 |
Cr13 |
Screw propeller type |
30 |
3900 |
Cr13 |
Perle T. impact type |
26.6 |
2240 |
Cr13 |
Gezhou Dam waterpower plant |
00Cr13Ni5Mo |