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Nickel-aluminum-chromium-molybdenum-iron eutectic alloy and preparation method thereof

A eutectic alloy, chromium-molybdenum technology, applied in the field of nickel-aluminum-based eutectic alloy and its preparation, can solve problems such as reducing fracture toughness at room temperature, and achieve the effects of excellent mechanical properties, improved toughness, and improved ductility

Inactive Publication Date: 2018-09-18
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although in this alloy, Hf can significantly improve its high temperature strength, but the presence of Hf leads to the appearance of Hf solid solution phase or Heusler phase on the interface, which reduces the room temperature fracture toughness, and at the same time, the ductility of the alloy also has certain problems.

Method used

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  • Nickel-aluminum-chromium-molybdenum-iron eutectic alloy and preparation method thereof
  • Nickel-aluminum-chromium-molybdenum-iron eutectic alloy and preparation method thereof
  • Nickel-aluminum-chromium-molybdenum-iron eutectic alloy and preparation method thereof

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preparation example Construction

[0031] The preparation method of a kind of nickel-aluminum-chromium-molybdenum-iron eutectic alloy of the present invention is specifically implemented according to the following steps:

[0032] Step 1, weighing raw materials according to the composition of the atomic percentage of the alloy;

[0033] Specifically, Ni block, Al rod, Cr sheet, Mo wire and Fe rod are weighed according to the atomic percentage of NiAl-28Cr-6Mo-xFe;

[0034] Among them, the purity of Ni blocks is 99.9-99.96wt%, the purity of Al rods is 99.9-99.99wt%, the purity of Cr flakes is 99.7-99.9wt%, the purity of Mo silk is 99.9-99.95wt%, and the purity of Fe rods is 99.9 ~99.96wt%;

[0035] Step 2, pre-treat the raw materials weighed in step 1. The specific method is to polish the Mo wire, Ni block and Fe rod, and pickle the Al rod to remove the scale on the surface of the raw material, wherein the pickling solution According to concentrated HCl and H 2 The volume ratio of O is 0.9~1.1:1 for proportion...

Embodiment 1

[0042] A nickel-aluminum-chromium-molybdenum-iron eutectic alloy, which consists of NiAl-28Cr-6Mo-2Fe, wherein Ni and Al are in an equal atomic ratio; specifically, it is prepared by the following method,

[0043] Step 1, weighing raw materials according to the composition of the atomic percentage of the alloy;

[0044]Specifically, according to the atomic percentage of NiAl-28Cr-6Mo-2Fe, weigh Ni blocks, Al rods, Cr flakes, Mo filaments, and Fe rods; among them, the atomic ratios of Ni and Al are equal, and the purity of Ni blocks is 99.9-99.96wt% , the purity of Al rods is 99.9-99.99wt%, the purity of Cr flakes is 99.7-99.9wt%, the purity of Mo wire is 99.9-99.95wt%, and the purity of Fe rods is 99.9-99.96wt%;

[0045] Step 2, pre-treat the raw materials weighed in step 1. The specific method is to polish the Mo wire, Ni block and Fe rod, and pickle the Al rod to remove the scale on the surface of the raw material, wherein the pickling solution According to concentrated HCl...

Embodiment 2

[0053] A nickel-aluminum-chromium-molybdenum-iron eutectic alloy, which consists of NiAl-28Cr-6Mo-5Fe, wherein Ni and Al are in an equal atomic ratio; specifically, it is prepared by the following method,

[0054] Step 1, weighing raw materials according to the composition of the atomic percentage of the alloy;

[0055] Specifically, according to the atomic percentage of NiAl-28Cr-6Mo-5Fe, weigh Ni blocks, Al rods, Cr flakes, Mo filaments, and Fe rods; among them, the atomic ratios of Ni and Al are equal, and the purity of Ni blocks is 99.9-99.96wt% , the purity of Al rods is 99.9-99.99wt%, the purity of Cr flakes is 99.7-99.9wt%, the purity of Mo wire is 99.9-99.95wt%, and the purity of Fe rods is 99.9-99.96wt%;

[0056] Step 2, pre-treat the raw materials weighed in step 1. The specific method is to polish the Mo wire, Ni block and Fe rod, and pickle the Al rod to remove the scale on the surface of the raw material, wherein the pickling solution According to concentrated HC...

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Abstract

The invention discloses a nickel-aluminum-chromium-molybdenum-iron eutectic alloy, wherein the composition is according to the atom percentage of NiAl-28Cr-6Mo-xFe, the atomic ratio of Ni to Al is 1:1, and x is more than 0 and is less than or equal to 10 at%. The invention further discloses a preparation method of the nickel-aluminum-chromium-molybdenum-iron eutectic alloy, wherein the preparationmethod specifically comprises: 1, weighing the raw materials according to the atomic percentage ratio of the components of the alloy; 2, carrying out pre-treatment on the weighed raw materials; 3, calculating the compensation amounts of Al and Cr, and weighing the corresponding raw materials; 4, smelting to prepare the nickel-aluminum-chromium-molybdenum-iron eutectic alloy. According to the present invention, the components of the nickel-aluminum-chromium-molybdenum-iron eutectic alloy are determined, and the prepared nickel-aluminum-chromium-molybdenum-iron eutectic alloy has the significantly improved mechanical property, significantly improved room temperature fracture toughness and the significantly improved ductility.

Description

technical field [0001] The invention belongs to the technical field of nickel-aluminum-based eutectic alloy and its preparation, relates to a nickel-aluminum-chromium-molybdenum-iron eutectic alloy, and also relates to a preparation method of the nickel-aluminum-chromium-molybdenum-iron eutectic alloy. Background technique [0002] The intermetallic compound NiAl is expected to replace Ni-based superalloys as an ideal high-temperature structural material because of its low density, high melting point, good thermal conductivity and excellent oxidation resistance. However, its low room temperature fracture toughness and poor high temperature strength limit its application. Many universities or research institutes introduce the second phase into NiAl alloy by alloying (Cr, Mo, V, Nb, Ta), forming NiAl-Cr and NiAl-Mo rod eutectic alloys and NiAl-Cr (Mo ), NiAl-V, NiAl-Nb and NiAl-Ta lamellar eutectic alloys. [0003] NiAl-Cr(Mo) eutectic alloy is expected to replace Ni-based s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/02C22B4/06
Inventor 王雷张国君张云鹏许恒新王涛高露晗
Owner XIAN UNIV OF TECH
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