Nickel-based high-temperature alloy bar and preparation method thereof

A technology of nickel-based superalloys and superalloys, which is applied in the field of nickel-based superalloy rods and their preparation, can solve the problems of unsatisfactory use requirements and low strength, improve plasticity, hardness and wear resistance, and improve microstructure and performance stability effects

Inactive Publication Date: 2020-04-28
JIANGSU XINHUA ALLOY ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The 718 nickel-based superalloy produced by the existing technology has defects such as low strength, especially the maximum hardness at room temperature is only 45HRc, which cannot meet some special requirements for use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] In this embodiment, the composition of the alloy raw material is specifically:

[0044] C: 0.05%, Si: 0.25%, Mn: 0.15%, P: 0.01%, S: 0.01%, Cr: 18.50%, Al: 0.38%, B: 0.003%, Mo: 2.90%, Ni: 50.5%, (Nb+Ta): 4.80%, Ti: 0.80%, Pb: 0.0010%, Bi: 0.0001%, Ag: 0.0002%, Ca: 0.005%, Mg: 0.005%, Cu: 0.10%, Co: 0.04%, Yu The amount is Fe.

[0045] When preparing the nickel-based superalloy rod, the following steps are specifically included:

[0046] S1 Vacuum smelting: After the alloy raw materials are accurately dosed according to the predetermined weight ratio, they are put into a vacuum smelting furnace for smelting to obtain alloy steel ingots. Further, S1 vacuum smelting is divided into charging, melting period, refining period and pouring period. The specific steps are: during the charging process, other raw materials except Ni in the alloy raw materials after precise batching are distributed in layers, and in the melting period, vacuum The temperature is 3.5Pa; part of Ni u...

Embodiment 2

[0053] In this embodiment, the composition of the alloy raw material is specifically:

[0054] C: 0.06%; Si: 0.25%; Mn: 0.25%; P: 0.012%, S: 0.006%, Cr: 19.0%, Al: 0.52%, B: 0.004%, Mo: 3.0%, Ni: 53.0%, (Nb+Ta): 5.1%, Ti: 0.95%, Pb: 0.0008%, Bi: 0.0001%, Ag: 0.0003%, Ca: 0.01%, Mg: 0.01%, Cu: 0.15%, Co: 0.05%, Yu The amount is Fe.

[0055] When preparing the nickel-based superalloy rod, the following steps are specifically included:

[0056] S1 Vacuum smelting: After the alloy raw materials are accurately dosed according to the predetermined weight ratio, they are put into a vacuum smelting furnace for smelting to obtain alloy steel ingots. Further, S1 vacuum smelting is divided into charging, melting period, refining period and pouring period. The specific steps are: during the charging process, other raw materials except Ni in the alloy raw materials after precise batching are distributed in layers, and in the melting period, vacuum The temperature is 3.5Pa; part of Ni us...

Embodiment 3

[0063] In this embodiment, the composition of the alloy raw material is specifically:

[0064] C: 0.07%, Si: 0.30%, Mn: 0.25%, P: 0.015%, S: 0.006%, Cr: 20.0%, Al: 0.65%, B: 0.005%, Mo: 3.15%, Ni: 52%, (Nb+Ta): 5.30%, Ti: 0.95%, Pb: 0.0009%, Bi: 0.00006%, Ag: 0.0003%, Ca: 0.007%, Mg: 0.005%, Cu: 0.20%, Co: 0.9%, Yu The amount is Fe.

[0065] When preparing the nickel-based superalloy rod, the following steps are specifically included:

[0066] S1 Vacuum smelting: After the alloy raw materials are accurately dosed according to the predetermined weight ratio, they are put into a vacuum smelting furnace for smelting to obtain alloy steel ingots. Further, S1 vacuum smelting is divided into charging, melting period, refining period and pouring period. The specific steps are: during the charging process, other raw materials except Ni in the alloy raw materials after precise batching are distributed in layers, and in the melting period, vacuum The temperature is 3.5Pa; part of Ni ...

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Abstract

The invention provides a nickel-based high-temperature alloy bar and a preparation method thereof. The nickel-based high-temperature alloy bar comprises the following steps of S1, vacuum smelting; S2,forging; S3, hot rolling; S4, solid solution treatment; and S5, machining. On a basis of optimizing alloying element components, a relationship between strength and toughness of an alloy is coordinated, so that high strength and high toughness of the nickel-based high-temperature alloy are achieved. By adopting advanced vacuum smelting process and electroslag remelting process, the obtained alloycomponents are uniform in tissue, and a high purity precision alloy ingot is obtained. The alloy bar which is relatively high in thermoplasticity is prepared by way of hot forging, hot rolling and solid solution treatment. Compared with a conventional 718 high-temperature alloy bar, the nickel-based high-temperature alloy bar is more excellent in mechanical property, and hardness and wear resistance of the bar are improved well.

Description

technical field [0001] The invention relates to the technical field of alloy preparation, in particular to a nickel-based superalloy rod and a preparation method thereof. Background technique [0002] Superalloys refer to high-alloyed iron-based, nickel-based or cobalt-based austenitic metal materials that can withstand high temperatures above 600°C, withstand relatively large and complex stresses, and have surface stability. Superalloys have good high-temperature strength, oxidation and corrosion resistance, excellent fatigue and creep resistance, fracture performance and structural stability, and are irreplaceable key materials for modern national defense construction and national economic development. The development of high-temperature alloys is closely related to the development of aero-engines and various industrial gas turbines. In aero-engines, they are mainly used in the four hot-end components of guides, turbine blades, turbine disks, and combustion chambers. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22C1/02C22C1/06C22F1/10
CPCC22C1/023C22C1/06C22C19/055C22C19/056C22F1/10
Inventor 王树平华大凤邵兴明刘威陈杰华鹏焦桂中
Owner JIANGSU XINHUA ALLOY ELECTRIC
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