CNC Machined Francis Runner, Francis Runner Band Heat Treatment For Sale & Manufacturer

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Forged Entire CNC Machined Francis Runner

CNC Machined Francis Runner, Francis Runner Band Heat Treatment For Sale & Manufacturer

Forging could considerably improve metal’s organizational structure and mechanical property.

Forging offers uniformity of composition and structure. Forging results in metallurgical recrystalisation and grain refinement as a result of the thermal cycle and deformation process. This strengthens the resulting steel product particularly in terms of impact and shear strength.

Forged steel is generally stronger and more reliable than castings of same material due to the fact that the grain flows of the steelare altered, conforming to the shape of the part.

Forged Integrally +100% CNC Machined Francis Runner

1. GETAI has improved the manufacturing procedure of Francis turbine runner which suffered from the problems such as the cavitation and abrasion, welding seam cracks between crown, band and vanes, block worn off from vane etc. The whole Francis runner is forged integrally followed by entire CNC machining to eliminate tiny blowholes and slag inclusions existed on passage surface which accelerate cavitation and abrasion, and solve the potential risk existed by unreleased stress left after welding. The Francis turbine runner service life prolonged consequently.

Francis Runner Band Heat Treatment For Sale

In the case the high head Francis runner with long and narrow passageway which is hard for entire CNC machining or the runner size exceeds the forging range which can not be forged integrally, GETAI applied a procedure by dividing the runner to two parts which consisted of crown with half vanes and band with rest half, both two parts can be forged integrally with entire CNC machining and welding assembled in final. The welding applied to the middle of vane, where is convenient for single pass welding without touch of potential crack area, the operation security and service life are improved largely.

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