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US 11,319,609 B2Granted
Steel for crankshaft and method of manufacturing crankshaft using the same
AssigneesHyundai Motor Company, Kia Motors Corporation, Hyundai Steel Company
InventorsSung Hwan Kim, Chan Woo Kim
Life of this patent
Estimating the term…
Abstract
Steel for a crankshaft includes 0.37 to 0.42 wt % of carbon (C), 0.55 to 0.70 wt % of silicon (Si), 1.45 to 1.65 wt % of manganese (Mn), 0.025 wt % or less (excluding 0 wt %) of phosphorus (P), 0.020 to 0.035 wt % of sulfur (S), 0.15 to 0.30 wt % of chromium (Cr), 0.035 to 0.055% of vanadium (V), and the remainder of Fe and other inevitable impurities. The steel for a crankshaft has strength that is maintained high even when reducing the amount of vanadium.
Claims7
A steel for a crankshaft, consisting of:
- 0.37 to 0.42 wt % of carbon (C), 0.55 to 0.70 wt % of silicon 5 (Si), 1.45 to 1.65 wt % of manganese (Mn), 0.025 wt % or less and excluding 0 wt % of phosphorus (P), 0.020 to 0.035 wt % of sulfur (S), 0.15 to 0.30 wt % of chromium (Cr), 0.035 to 0.048% of vanadium (V), and a remainder of Fe and other inevitable impurities,
- wherein the steel comprises pearlite and ferrite structures, and an average lamellar spacing of pearlite is 0.20 μm or less.
Dependencies are inferred from the claim text.