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High-strength high-corrosion resistance thallium-based nickel base superalloy and preparation method thereof

A nickel-based superalloy, high corrosion resistance technology, applied in the field of yttrium-containing nickel-based superalloy, can solve problems such as damage to economic value, safety hazards, fracture of metal components, etc., to improve corrosion resistance, internal uniformity, and impurity content. low effect

Inactive Publication Date: 2018-08-07
SICHUAN JIANGYOU LIUHE STEAM TURBINE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is because there is a large amount of oxygen and water vapor in the fuel gas of aviation jet engines, as well as corrosive gases such as sulfur dioxide and hydrogen sulfide, which have a strong oxidation and corrosion effect on high-temperature parts. It must withstand greater stress; the greater the stress amplitude, the higher the strength requirements for the alloy material, otherwise it will cause the fracture of the metal component, which will not only damage the economic value, but also cause safety hazards

Method used

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  • High-strength high-corrosion resistance thallium-based nickel base superalloy and preparation method thereof
  • High-strength high-corrosion resistance thallium-based nickel base superalloy and preparation method thereof
  • High-strength high-corrosion resistance thallium-based nickel base superalloy and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A high-strength and high-corrosion-resistant thallium-containing nickel-based superalloy is characterized in that, in percentage terms, the alloy includes: Cr: 8%; Tl: 4.5%; Fe: 16%; Mo: 11%; C Al: 1.5%; Cu: 4%; Nb: 0.01%; the balance is Ni and unavoidable impurities.

[0033] The preparation method of above-mentioned alloy material is as follows:

[0034] (1) Weigh the raw materials according to the proportion of the components, and then smelt them in a vacuum induction furnace to ensure that the smelting temperature is 1480°C, and pour them into consumable electrodes after smelting;

[0035] (2) The consumable electrode obtained in step (1) is remelted and refined in a vacuum consumable furnace, and the five-element slag remelting system is: CaF 2 :56%, Al 2 o 3 :20%, CaO:15%, MgO:4%, SiO 2 : 3%; after refining, forced cooling and remelting into electroslag ingots, the refining temperature is 1380°C, and the refining time is: 10 minutes; the cooling temperature is...

Embodiment 2

[0043] A high-strength and high-corrosion-resistant thallium-containing nickel-based superalloy is characterized in that, in percentage terms, the alloy includes: Cr: 11%; Tl: 6%; Fe: 18%; Mo: 17%; C Al: 2%; Cu: 6%; Nb: 0.25%; the balance is Ni and unavoidable impurities.

[0044] The preparation method of above-mentioned alloy material is as follows:

[0045] (1) Weigh the raw materials according to the proportion of the components, and then smelt them in a vacuum induction furnace to ensure that the smelting temperature is 1490°C, and pour them into consumable electrodes after smelting;

[0046] (2) The consumable electrode obtained in step (1) is remelted and refined in a vacuum consumable furnace, and the five-element slag remelting system is: CaF 2 :59%, Al 2 o 3 :2%, CaO:17%, MgO:7%, SiO 2 : 6%; after refining, forced cooling and remelting into electroslag ingots, the refining temperature is 1400°C, and the refining time is: 14 minutes; the cooling temperature is 43°C;...

Embodiment 3

[0054] A high-strength and high-corrosion-resistant thallium-containing nickel-based superalloy is characterized in that, in percentage terms, the alloy includes: Cr: 9.8%; Tl: 4.25%; Fe: 16.8%; Mo: 13.25%; C Al: 1.55%; Cu: 4.95%; Nb: 0.15%; the balance is Ni and unavoidable impurities.

[0055] The preparation method of above-mentioned alloy material is as follows:

[0056] (1) Weigh the raw materials according to the proportion of the components, and then smelt them in a vacuum induction furnace to ensure that the smelting temperature is 1485°C, and pour them into consumable electrodes after smelting;

[0057] (2) The consumable electrode obtained in step (1) is remelted and refined in a vacuum consumable furnace, and the five-element slag remelting system is: CaF 2 :58%, Al 2 o 3 : 21%, CaO: 16%, MgO: 6%, SiO 2 : 4.5%; after refining, forced cooling and remelting into electroslag ingots, the refining temperature is 1390°C, and the refining time is: 12 minutes; the cooli...

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Abstract

The invention relates to the field of nickel base superalloy, and particularly relates to a high-strength high-corrosion resistance thallium-based nickel base superalloy and a preparation method thereof. The nickel base superalloy prepared by the invention contains the following components by weight percent: 8-11% of Cr, 4.5-6% of Tl, 16-18% of Fe, 11-17% of Mo, 0.01-0.025% C, 1.5-2% of Al, 4-6% of Cu, 0.01-0.25% of Nb, and the balance of Ni and inevitable impurities. The method greatly improves the strength of the nickel base superalloy, the tensile strength of which is promoted to 1520MPa, the yield strength of which is promoted to 950MPa, and the elongation of which is promoted to 32.5%, and the corrosion resistance of the nickel base superalloy is greatly promoted, with the annual average corrosion rate of the nickel base superalloy being reduced to -3.91*10<-3>mm / yr at 600 DEG C, and the remarkable effect is obvious.

Description

technical field [0001] The invention relates to the field of yttrium-containing nickel-based superalloys, in particular to a high-strength and high-corrosion-resistant thallium-containing nickel-based superalloy and a preparation method thereof. Background technique [0002] With the advancement of science and technology, the efficiency and thrust of aero-engines are constantly improving; in recent years, the temperature of turbine blade materials used in aero-engines has grown steadily at a rate of about 8°C per year, and the growth of engine performance has also contributed to the performance of engine metal materials. Higher requirements are also put forward, so how to meet the increasing performance requirements of blade materials is an important research topic in the field of superalloys. [0003] Nickel-based superalloys were developed in the late 1930s; nickel itself is a multifunctional corrosion-resistant material with excellent properties, and nickel-based alloys h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22C1/02C22F1/10
CPCC22C19/056C22C1/023C22F1/10
Inventor 李建雷德江张华国粟硕周江波韦家向付洋
Owner SICHUAN JIANGYOU LIUHE STEAM TURBINE MATERIAL
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