Material Requirements and Specifications for Gear Couplings
The internal structure of gear couplings is complex, requiring specific materials to meet the torque and rotational speed demands. Commonly used materials include 42CrMo and Grade 45 forged steel. These materials are selected for their wear resistance: higher material hardness improves wear resistance, enhances torque capacity, and extends the service life of the coupling.
42CrMo Steel used in gear couplings is an ultra-high-strength steel characterized by:
· High strength and toughness,
· Good harden-ability with minimal deformation during quenching,
· Absence of noticeable temper brittleness,
· High fatigue resistance and multi-impact resistance after quenching and tempering treatment,
· Excellent low-temperature impact toughness,
· Superior creep strength and enduring high-temperature performance.
For heat treatment, surface hardening after quenching and tempering is typically applied to optimize its mechanical properties.
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