The Francis Turbine Guide Vane Shaft is a critical component within the guide vane assembly, providing precise rotation and torque transmission between guide vanes and the turbine rotor. Designed for high torsional strength, fatigue resistance, and long-term cyclic stability, it ensures stable flow regulation and optimal performance under variable load and hydraulic conditions.
Our shafts are produced through a traceable, controlled process, combining structural reliability with high interface accuracy:
1, Material Inspection: Alloy steel (42CrMo4 / 34CrNiMo6) verified for chemical composition, mechanical properties, and surface quality.
2, Cutting & Preheating: Raw materials cut to project-specific lengths and uniformly preheated.
3, Open-Die Forging & Inspection: Shaft plastically deformed into shape; dimensional and surface checks performed.
4, Heat Treatment: Normalizing, quenching & tempering, or customized processes; local reinforcement on high-stress zones.
5, Physicochemical Tests: Hardness, metallography, and spectrochemical analysis.
6, Rough & Semi-Finish Machining: Preliminary dimensions and reference surfaces established.
7, Ultrasonic Testing & Dimension Verification: Ensures defect-free internal structure.
8, Precision CNC Machining: Machined to strict concentricity and runout tolerances.
9, Final Inspection: All parameters verified against drawings.
10, Identification, Cleaning, Packaging & Storage: Traceability, corrosion protection, and secure packaging.
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