Ni-based alloy and valve
AssigneeHuaiji Valve USA Inc
InventorRong Qu
Life of this patent
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Abstract
The present disclosure provides a Ni-based alloy and a valve made of the same. The Ni-based alloy includes, on a weight basis: about 14%-17% Cr, about 4%-6% Al, about 1.0%-1.5% Ti, about 8%-11% Co, about 6%-9% W, about 0.5%-1.5% Ta, no more than about 0.25% Fe, about 0-2.0% Mo, about 0.07%-0.18% C, about 0.01%-0.03% Zr, about 0.005%-0.015% B, a balance of Ni, and incidental impurities. The Ni-based alloy, when used to fabricate engine valves, may significantly improve the corrosion resistance and oxidation resistance of the engine vales. The engine valves may also possess other desirable properties, such as high fatigue strength, high tensile strength and good weldability. The engine valves may also have extended useable life. The cost for manufacturing such engine valves may also be reduced.
Claims20
A Ni-based alloy for a valve, comprising, on a weight basis:
- Cr:
- 14-17%;
- Al:
- 4-6%;
- Ti:
- 1-1.5%;
- Co:
- 8-11%;
- W:
- 6-9%;
- Ta:
- 0.5-1.5%;
- Fe:
- no more than 0.25%;
- Mo:
- 0-2%;
- C:
- 0.07-0.18%;
- Zr:
- 0.01-0.03%;
- B:
- 0.005-0.015%;
- and
- a balance of Ni, wherein
- the valve includes a valve head and a valve stem attached to the valve head.
A Ni-based alloy, comprising, on a weight basis:
- Cr:
- 14.8-15.2%;
- Al:
- 4.8-5.2%;
- Ti:
- 1.28-1.35%;
- Co:
- 9-10%;
- W:
- 7-8%;
- Ta:
- 0.85-1.15%;
- Fe:
- no more than 0.15%;
- Mo:
- 1.0-1.5%;
- C:
- 0.08-0.12%;
- Zr:
- 0.018-0.022%;
- B:
- 0.008-0.012%;
- and
- a balance of Ni.
A valve, comprising:
- a valve head;
- a valve stem attached to the valve head,
- wherein the valve includes a Ni-based alloy include, on a weight basis:
- Cr:
- 14-17%,
- Al:
- 4-6%,
- Ti:
- 1-1.5%,
- Co:
- 8-11%,
- W:
- 6-9%,
- Ta:
- 0.5-1.5%,
- Fe:
- no more than 0.25%,
- Mo:
- 0-2%,
- C:
- 0.07-0.18%,
- Zr:
- 0.01-0.03%,
- B:
- 0.005-0.015%, and
- a balance of Ni.
Dependencies are inferred from the claim text.