The invention discloses high-cleanliness
spring steel and a production method thereof. The production method comprises the following steps: pretreatment: desulfurizing molten iron until the content of S in the molten iron is less than or equal to 0.0015%; mixing the molten iron and waste steel into
molten steel, carrying out desiliconization, dephosphorization and
oxygen blowing
decarburization, obtaining the
molten steel with the temperature of 111011110 DEG C, the C content of 0.1010.15%, the O content of smaller than or equal to 0.045%, the P content of smaller than or equal to 0.011% and the S content of 0.00110.008%, carrying out
slag stopping tapping, carrying out deoxidation alloying, and the flow of
argon blowing at the bottom of a steel
ladle during tapping and the flow of
argon blowing at the bottom of the steel
ladle after tapping are 80011000 NL / min and 1001200 NL / min respectively; refining the
molten steel to adjust chemical components and inclusions, and the flow rates of the
argon blowing at the bottom of the steel
ladle are respectively 1001500 NL / min, 2001100 NL / min and 501100 NL / min in other time when
slag charge adding and alloying treatment are carried out and the temperature is increased by electrifying; then carrying out vacuum refining and vacuum breaking soft stirring in sequence, and the flow of the argon blowing at the bottom of the steel ladle is 20150 NL / min and 501100 NL / min; and
casting into a steel billet. In the high-cleanliness
spring steel prepared through the production method, the density of inclusions with the size larger than 5 micrometers is smaller than or equal to 0.5pcs / mm < 2 >, the length-width product of the maximum inclusions is smaller than or equal to 900 micrometers < 2 >, and the high-cleanliness
spring steel has high cleanliness.