High-quality medium-carbon wavy spring

The invention discloses a high-quality medium-carbon wavy spring. In a wavy spring body, the carbon content is about 0.5% to 0.55%, the manganese content is about 0.6% to 0.7% and the balance iron, the wavy spring is formed, then carbonitriding treatment is carried out, and a strengthened layer is formed in the surface. According to the high-quality medium-carbon wavy spring, the wavy spring is reasonable in raw material selection, scientific in treating technology, suitable in preparing cost and excellent in combination performance, a surface layer has remarkable abrasive resistance and remarkable corrosion resistance, and the service life is long.