Alloy steel in which carburization is prevented by processing load and method of manufacturing the same
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsJae-Hong Park, Min-Woo Kang, Jae-Woon Hwang, Hyun-Kyu Kim
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Abstract
Provided herein is an alloy steel in which carburization is prevented by a processing load, the alloy steel including: about 0.13 to 0.25 wt % of carbon (C), about 0.6 to 1.5 wt % of silicon (Si), about 0.6 to 1.5 wt % of manganese (Mn), about 1.5 to 3.0 wt % of chromium (Cr), about 0.01 to 0.1 wt % of niobium (Nb), about 0.01 to 0.1 wt % of aluminum (Al), about 0.05 to 0.5 wt % of vanadium (V), the balance iron (Fe), and impurities, based on the total weight of the alloy steel.
Claims12
A method of manufacturing an alloy steel in which carburization is prevented by a processing load, the method comprising:
- a forging step in which an alloy steel is forged;
- wherein the alloy steel comprising:
- about 0.13 to 0.25 wt % of carbon (C),
- about 0.6 to 1.5 wt % of silicon (Si),
- about 0.6 to 1.5 wt % of manganese (Mn),
- about 1.5 to 3.0 wt % of chromium (Cr),
- about 0.01 to 0.1 wt % of niobium (Nb),
- about 0.01 to 0.1 wt % of aluminum (Al),
- about 0.05 to 0.5 wt % of vanadium (V),
- the balance iron (Fe), and
- impurities,
- based on the total weight of the alloy steel;
- a heat treatment step in which the alloy steel is heat-treated;
- a working step in which the alloy steel is processed while a processing load is imposed on a portion of the alloy steel;
- a carburizing heat treatment step in which the alloy steel is subjected to a carburizing heat treatment, wherein the portion of the alloy steel on which the processing load was imposed is not carburized;
- and
- a polishing step in which the alloy steel subjected to the carburizing heat treatment is polished.
Dependencies are inferred from the claim text.