High strength carburizing steel having improved durability
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsMin-Woo Kang, Soon-Woo Kwon, Min-Woo Kang, Hyun-Ki Kim, Dong-Hwi Kim, In-Beom Lee, Chung-An Lee, Seung-Hyun Hong
Life of this patent
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Abstract
A carburizing steel includes, based on a total wt % of the carburizing steel: 0.1 wt % or more and 0.3 wt % or less of C (carbon); 2.0 wt % or more and 2.7 wt % or less of Cr (chrome); 0.4 wt % or more of Si (silicon); 0.3 wt % or more and 0.7 wt % or less of Mo (molybdenum); less than 0.7 wt % of Mn (manganese); and 0.6 wt % or more and 1.5 wt % or less of Ni (nickel).
Claims16
A carburizing steel comprising, based on a total wt % of the carburizing steel:
- 0.1 wt % or more and 0.3 wt % or less of C (carbon):
- 2.0 wt % or more and 2.7 wt % or less of Cr (chrome);
- 0.4 wt % or more and 0.7 wt % or less of Si (silicon);
- 0.3 wt % or more and 0.7 wt % or less of Mo (molybdenum);
- less than 0.7 wt % of Mn (manganese);
- and
- 0.6 wt % or more and 1.5 wt % or less of Ni (nickel).
A carburizing steel comprising, based on a total wt % of the carburizing steel:
- 0.1 wt % or more and 0.3 wt % or less of C (carbon);
- 2.0 wt % or more and 2.7 wt % or less of Cr (chrome), 0.4 wt % or more and 0.7 wt % or less of Si (silicon);
- 0.3 wt % or more and 0.7 wt % or less of Mo (molybdenum);
- less than 0.7 wt % of Mn (manganese);
- 0.6 wt % or more and 1.5 wt % or less of Ni (nickel);
- 1.0 wt % or less of the sum of Ti (titanium), V (vanadium), and Nb (niobium);
- and
- 1 to 30 ppm of B (boron),
- wherein a value of the following formula satisfies 0.2 or more,
- [Ni]+0.3[Mn])/([Cr]+3[Si],
- where [Ni], [Mn], [Cr], [Si] mean the wt % of Ni, Mn, Cr, Si, respectively.
Dependencies are inferred from the claim text.