Titanium aluminides and precision cast articles made therefrom
AssigneeIshikawajima-Harima Heavy Industries Co., Ltd.
InventorKenji Matsuda
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Abstract
A titanium aluminide is composed of 31 to 34 mass % of Al, 1.5 to 3.0 mass % of Fe, 0.5 to 2.0 mass % of V, 0.18 to 0.35 mass % of B with remainder being Ti and inevitable impurities. The 0.5 to 2.0 mass % of V may be replaced with a 1.0 to 3.0 mass % of Mo or a 0.3 to 1.5 mass % of Cr. By precision casting this alloy, a novel titanium aluminide alloy is obtained in which numerous whisker-like Ti--B compound are uniformly dispersed. The titanium aluminide alloy does not possess a coarse lamellar structure which would cause cracking.
Claims5
A titanium aluminide comprising:
- 31 to 34 weight % of Al;
- 1.5 to 3.0 weight % of Fe;
- 0.18 to 0.35 weight % of B;
- and
- a predetermined amount of an element for refining Ti--B formation, with remainder being Ti and impurities.
A titanium aluminide comprising:
- 31 to 34 weight % of Al;
- 1.5 to 3.0 weight % of Fe;
- 0.5 to 2.0 weight % of V;
- and
- 0.18 to 0.35 weight % of B, with remainder being Ti and inevitable impurities.
A titanium aluminide comprising:
- 31 to 34 weight % of Al;
- 1.5 to 3.0 weight % of Fe;
- 1.0 to 3.0 weight % of Mo;
- and
- 0.18 to 0.35 weight % of B, with remainder being Ti and inevitable impurities.
A titanium aluminide comprising:
- 31 to 34 weight % of Al;
- 1.5 to 3.0 weight % of Fe;
- 0.3 to 1.5 weight % of Cr;
- and
- 0.18 to 0.35 weight % of B, with remainder being Ti and inevitable impurities.
Dependencies are inferred from the claim text.