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  • Forged Wicket Gates Blades Guide Vanes

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We are professional A182-F6nm(CA6NM,UNS S41500,1.4313,X3CrNiMo13-4)forged forging steel guide vane wicket gates blades for francis hydro power turbine hydraulic water turbine generator ASTM A182-F6NM Grade F6NM ASTM A182 Gr F6nm F 6NM ASTM A743 CA-6NM AISI CA6NM Grade Gr CA6NM Forged Forging Steel Turbine Francis Hydro Power Hydraulic Turbine Generator Wicked Wicket Gates blades Guide vanes  from china

 

Wicket gate plays an important role in hydropower plants.  Wicket gate increases turbine revolution and after paralleling with net, increases the turbine load.  Changing in turning place of this part causes the change in flow rate of turbine runner.  Wicket gate conducts the water flow into runner.  In this case, the angle of entering water to runner is too important and plays an important role in efficiency and reducing cavitations.0005.jpg
Because of nature of flowing water in turbine direction, sandy parcels and impure material, and cavitations causes friction and corrosion in wicket gates.  So after a time depend on the condition of operation and the water and grease material, the journal place and the sealing   on the wicket will corrode.
In this case, manufacturing and and/or purchasing a new wicket gate is too expensive and needs much time, so AzarAb tries to use certain economical maintenance methods and makes the start to power plants easy.
Based on following applicable method wicket gates can be ready to perform in a short time: total wicket gate cleaning, quality control in all levels repairing the ruined parts, cleaning the welding surfaces, thermal operation for stress – relief, make the repaired surfaces to standard sizes by lathe operation, doing chrome campsite coating in friction surfaces and wicket gates seats.
The machining operation of wicket gate is too important in a way that shaft and seat angle of the sealing should be in the same direction.

Chemical composition of F6NM

 

  C Si Mn P S Cr Ni Mo Fe
Min 0.50 11.50 3.50 0.50 0.00
Max 0.05 0.60 1.00 0.030 0.030 14.00 5.50 1.00 0.00

Mechanical properties of F6NM

Condition: Hardened and Double Tempered

NACE MR0175 limits the supply hardness to 23 HRC max.
U.T.S 95 KSI Min (655 N/mm2)
0.2% Proof Stress 75 KSI Min (517 N/mm2)
Elongation 18 %  
Red of Area 35 %  
CVN Impacts @ -60°C (-75°F) 40 Joules (30 ft-lbf)

 

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