Steel alloy railway wheels
AssigneeSumitomo Metal Industries, Ltd.
InventorsTakashi Fujimura, Taizo Makino
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Abstract
Disclosed is a steel alloy that includes as alloying ingredients carbon, silicon, manganese, aluminum, and oxygen. In accordance with this embodiment of the disclosed invention, carbon is present in an amount ranging from 0.40 to 0.77 wt. %; silicon is present in an amount ranging from 0.40 to 1.20 wt. %; manganese is present in an amount ranging from 0.40 to 1.20 wt. %, aluminum is present in an amount ranging from 0.003 to 0.060 wt. %; and oxygen is present in an amount ranging up to 0.0030 wt. %. Also disclosed is a railway wheel that comprises a hub, a rim, and a connecting plate. In accordance with this embodiment of the disclosed invention, at least the rim, and preferably the entire railway wheel, is composed of the disclosed steel composition.
Claims6
A railway wheel comprising a rim, a hub, and a connecting plate between said rim and said hub, wherein at least the wheel rim is composed of a composition consisting essentially of:
- 0.40 to 0.77 wt. % carbon,
- 0.25 to 0.60 wt. % silicon,
- 0.40 to 1.20 wt. % manganese,
- 0.003 to 0.060 wt. % aluminum,
- up to 0.030 wt. % phosphorus,
- up to 0.030 wt. % sulfur,
- up to 0.35 wt. % nickel,
- up to 0.35 wt. % chromium,
- up to 0.35 wt % copper,
- up to 0.0050 wt. % calcium,
- 0.0015 to 0.0150 wt. % nitrogen,
- and inevitable impurities and balance iron.
A railway wheel comprising a rim, a hub, and a connecting plate between said rim and said hub, wherein at least the wheel rim is composed of a composition consisting essentially of:
- 0.40 to 0.77 wt. % carbon,
- 0.25 to 0.60 wt. % silicon,
- 0.40 to 1.20 wt. % manganese,
- 0.003 to 0.060 wt. % aluminum,
- up to 0.030 wt. % phosphorus,
- 0.005 wt. % to 0.030 wt. % sulfur,
- 0.01 to 0.35 wt. % nickel,
- up to 0.35 wt. % chromium,
- up to 0.35 wt % copper,
- up to 0.0050 wt. % calcium,
- 0.0015 to 0.0150 wt. % nitrogen,
- and inevitable impurities and balance iron.
Dependencies are inferred from the claim text.