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Valve alloy material and valve

An alloy material, exhaust valve technology, applied in the direction of machine/engine, mechanical equipment, engine components, etc., can solve the problems of high cost and difficult to meet oxidation resistance

Active Publication Date: 2022-01-25
CHONGQING SANAIHAILING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the upgrade of the engine, the improvement of performance or the improvement of emission requirements, the working temperature of the exhaust valve continues to rise. Creep performance can meet the requirements, but its oxidation resistance will be difficult to meet
If you choose a high-nickel alloy (such as a nickel-based alloy), although the high-temperature performance and oxidation resistance can meet higher temperature conditions, its cost is too high

Method used

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  • Valve alloy material and valve
  • Valve alloy material and valve
  • Valve alloy material and valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0032] Embodiment bar and solid solution aging treatment

[0033] C: 0.50(wt)%; Si: 0.14(wt)%;

[0034] Mn: 9.20(wt)%; P: 0.024;

[0035] S: 0.004(wt)%; Cr: 26.43(wt)%;

[0036] Ni: 3.91(wt)%; N: 0.59(wt)%;

[0037] W: 0.97(wt)%; Nb: 2.24(wt)%; and

[0038] The balance is Fe and unavoidable impurities.

[0039] Next, perform solution aging treatment on the obtained rods: solution treatment at about 1180°C for about half an hour, then water-cooled to room temperature; then aging treatment at about 780°C for about 1 hour, and finally air-cooled to room temperature.

[0040] Comparative example bars and solution aging treatment

[0041] The bars of the comparative example were prepared according to the process steps of the bars of the above examples. Compared with the above examples, only the chromium content ratio was adjusted to 21% in the comparative example, and the others remained unchanged.

[0042] Related performance comparison

[0043] figure 1 and figure...

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Abstract

Valve alloy material and valve. Valve alloy materials include (all by weight): C: 0.45‑0.55; Si: 0‑0.45; Mn: 8.00‑10.00; P: 0‑0.050; S: 0‑0.030; Cr: 25.00‑27.00; Ni: 3.50 ‑5.0; N: 0.40‑0.60; W: 0.80‑1.50; Nb: 1.80‑2.50; balance Fe. The alloy material of the invention can meet the requirements of the actual working condition of the exhaust valve in terms of oxidation resistance, high temperature strength and creep performance, and the cost does not increase substantially. In addition, the alloy material of the present invention is also particularly suitable for preparing hollow valves.

Description

technical field [0001] The invention relates to alloy materials, in particular to alloy materials and valves for manufacturing internal combustion engine valves, especially exhaust valves. Background technique [0002] Due to the upgrade of the engine, the improvement of performance or the improvement of emission requirements, the working temperature of the exhaust valve continues to rise. Creep performance can meet the requirements, but its oxidation resistance will be difficult to meet. If you choose a high-nickel alloy (such as a nickel-based alloy), although its high-temperature performance and oxidation resistance can meet higher temperature conditions, its cost is too high. Therefore, there is an urgent need to develop a valve alloy material that can meet the above-mentioned various performance requirements at least under the condition that the cost does not increase significantly. Contents of the invention [0003] One of the objects of the present invention is to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/58C22C38/02C22C38/44C22C38/48F01L3/02F01L3/14
CPCC22C38/58C22C38/02C22C38/002C22C38/001C22C38/44C22C38/48F01L3/02F01L3/14
Inventor 万时旺
Owner CHONGQING SANAIHAILING IND
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