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Rare earth enhanced palladium alloy and preparation method thereof

A palladium alloy and rare earth technology, applied in the field of rare earth reinforced palladium alloy and its preparation, can solve the problems of easy oxidation and creep, and achieve the effect of improving toughness and hardness, high specific strength, hardness and high temperature creep performance

Active Publication Date: 2019-08-20
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

[0004] The invention provides a rare earth reinforced palladium alloy and its preparation method to solve the problems of easy oxidation and creep of existing superalloys in harsh environments

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  • Rare earth enhanced palladium alloy and preparation method thereof
  • Rare earth enhanced palladium alloy and preparation method thereof
  • Rare earth enhanced palladium alloy and preparation method thereof

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preparation example Construction

[0038] The preparation method of the above-mentioned rare earth reinforced palladium alloy comprises the following steps:

[0039] Step (1): Palladium, vanadium and rare earth are subjected to surface derusting or degreasing treatment, and the molar ratio of Pd:RE:V is (7-x):x:1 palladium, rare earth and vanadium raw materials, wherein palladium The purity of , vanadium and rare earth RE is not less than 99.95wt%.

[0040] Step (2): Before putting in the raw materials, the vacuum furnace is repeatedly flushed with high-pressure pure argon for 3 times to remove the remaining impurity elements in the vacuum furnace and ensure that the vacuum degree in the vacuum furnace before smelting is less than 1.0E -4 Pa; put the raw materials prepared in step (1) into the crucible of the vacuum furnace (model KZG2-25), then pump the pressure in the vacuum furnace to below 18-20Pa, turn on the power, and feed the vacuum furnace with a power of 15-30KW Heat slowly, increase the power to 45-...

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Abstract

The invention relates to the technical field of high-temperature alloys and particularly discloses a rare earth enhanced palladium alloy. The chemical general formula of the alloy is Pd<7-x>RE<x>V, and the space groups belong to Fm3m. The Palladium, rare earth and vanadium raw materials are placed into a crucible; a vacuum furnace is heated to 1910-1930 DEG C and then is subjected to heat preservation for 20-30 min; during heat preservation, vacuum magnetic stirring is conducted at the stirring rate of 1800-2000 r / min and the stirring time of 10-12 min; after stopping stirring, the mixture isheated continuously, and the mixture is stirred once at time intervals of 3-5 min in the heating process and stops being heated until the temperature is raised to 1950-2000 DEG C; after all the mixture is melted into liquid, the power of the vacuum furnace is reduced to 10-15 KW and lasts for 0.5-1.5 h; and then the rare earth enhanced palladium alloy is obtained. The hardness, high-temperature oxidation resistance and high-temperature creep properties of the rare earth enhanced palladium alloy obtained through the technical scheme are all improved.

Description

technical field [0001] The invention relates to the technical field of superalloys, in particular to a rare earth reinforced palladium alloy and a preparation method thereof. Background technique [0002] Superalloys are one of the indispensable key materials for national defense weapons and national economic construction. They usually refer to a class of metals based on metal elements such as iron, nickel, and cobalt, which can work for a long time at high temperatures above 600°C and under certain stresses. Materials, with excellent high temperature strength, good oxidation resistance and thermal corrosion resistance, good fatigue performance, fracture toughness and other comprehensive properties, also known as "super alloys", are mainly used in aerospace and energy fields. [0003] With the advancement and development of science and technology, for example, the temperature in the operating environment of aircraft and engines is getting higher and higher, while the require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/04C22C1/02
CPCC22C5/04C22C1/02
Inventor 冯晶周云轩种晓宇
Owner KUNMING UNIV OF SCI & TECH
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