40Cr Steel: Breakthrough in Fatigue Life of Flexsplines in Harmonic Reducers

Product name:	40Cr Steel: Breakthrough in Fatigue Life of Flexsplines in Harmonic Reducers
Keywords:	40Cr Alloy Steel
Industry:	Industrial electronics and electrical engineering - Semiconductor industry
Process:	Others - Others
Material:	Alloy steel

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The primary cause of failure in harmonic reducers is fatigue fracture of the flexspline. 40Cr alloy steel (such as 40CrMoNiA) enhances durability through purity control (impurities ≤0.015%) and optimized tooth profile. Huachuang Securities points out that its yield strength is ≥785MPa, impact toughness is >63J, supporting the flexspline to withstand 10⁷ elastic deformations, increasing its lifespan by 3 times compared to ordinary steel, and is widely used in industrial robot joint transmissions.

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