Steel plate for leaf spring having excellent fatigue life and method for producing the same

CN114846170BActive Publication Date: 2025-01-10POHANG IRON & STEEL CO LTD
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Patent Information

Application Number
CN202080088945.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2019-12-20
Filing Date
2020-12-10
Publication Date
2025-01-10
Estimated Expiration
2040-12-10

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Abstract

According to one aspect of the present invention, the steel sheet for a leaf spring may contain, in terms of weight%, carbon (C): 0.7-1.0%, silicon (Si): 0.1-0.4%, manganese (Mn): 0.2-1.0%, chromium (Cr): 0.05-2.0%, vanadium (V): 0.07-0.2%, phosphorus (P): 0.03% or less, sulfur (S): 0.03% or less, and the remainder of Fe and unavoidable impurities, the fine structure may contain 99 area % or more of pearlite and 1 area % or less (excluding 0%) of vanadium carbide (VC), and the average grain size of the prior austenite may be 28 μm or less.
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Citation Information

Patent Citations

  • A high carbon steel sheet superior in yield strength and cold working and manufacturing method thereof

    KR1020080060619A

  • High carbon steel sheet superior in fatiugue lifeand manufacturing method thereof

    KR101445868B1

  • High carbon hot rolled steel coil and manufacturing method thereof

    KR1020100021273A