NiAl-Cr(Mo) biphase eutectic crystal intermetallic compound modified by V

A technology of intermetallic compounds and eutectic metals, which is applied in the field of V-modified NiAl-Cr dual-phase eutectic intermetallic compounds, which can solve the problems of not being able to meet the requirements of use and little improvement in high-temperature strength

Inactive Publication Date: 2008-03-26
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the high-temperature strength of the NiAl-Cr(Mo) dual-phase eutectic alloy has not been greatly improved, and it still cannot meet the requirements of the new generation of gas turbine e

Method used

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  • NiAl-Cr(Mo) biphase eutectic crystal intermetallic compound modified by V
  • NiAl-Cr(Mo) biphase eutectic crystal intermetallic compound modified by V
  • NiAl-Cr(Mo) biphase eutectic crystal intermetallic compound modified by V

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example 1: Preparation of 33Ni-22Al-30Cr-4Mo-11V intermetallic compound

[0032] According to the composition of 33Ni-22Al-30Cr-4Mo-11V (atomic percentage), the raw materials are all 99.999% pure. Use non-consumable vacuum arc furnace to smelt 33Ni-22Al-30Cr-4Mo-11V alloy ingots with a vacuum of 5×10 -3 Pa, smelting temperature 3000℃, refining 4 times, and the raw materials can be smelted uniformly.

[0033] The prepared intermetallic compound rods are kept in a high temperature heat treatment furnace at 1200° C. for 12 hours and then cooled to room temperature with the furnace.

[0034] The wire cutting method was used to cut a cylindrical sample with a diameter of 6mm and a height of 9mm from the heat-treated 33Ni-22Al-30Cr-4Mo-11V ingot and a square cylinder with a size of 6mm×6mm×30mm for mechanical performance testing.

[0035] Using 1111 type accuracy is 10 -4 The g electronic balance measures the mass M of the sample with an accuracy of 10 -2 mm vernier caliper mea...

Example Embodiment

[0037] Example 2: Preparation of 33Ni-30Al-30Cr-4Mo-3V intermetallic compound

[0038] According to the composition of 33Ni-30Al-30Cr-4Mo-3V (atomic percentage), the raw materials are all 99.999% pure. Use non-consumable vacuum electric arc furnace to smelt 33Ni-30Al-30Cr-4Mo-3V alloy ingots, with a vacuum of 3×10 -3 Pa, smelting temperature 2700℃, smelting 6 times, and the raw materials can be smelted uniformly.

[0039] The prepared intermetallic compound rods are kept in a high temperature heat treatment furnace at 1200° C. for 12 hours and then cooled to room temperature with the furnace.

[0040] The test conditions for the mechanical properties of 33Ni-30Al-30Cr-4Mo-3V intermetallic compound are the same as in Example 1, and its density is 6.07g / cm 3 Refer to Figure 2, where the yield strength at 25°C is 2100MPa and the compressive plasticity is greater than 23%; the yield strength at 600°C is 1250MPa and the compressive plasticity is greater than 40%; the yield strength a...

Example Embodiment

[0041] Example 3: Preparation of 33Ni-28Al-30Cr-4Mo-5V intermetallic compound

[0042] According to the composition of 33Ni-28Al-30Cr-4Mo-5V (atomic percentage), the raw materials are all 99.999% pure. Use non-consumable vacuum electric arc furnace to smelt 33Ni-28Al-30Cr-4Mo-5V alloy ingots with a vacuum of 4×10 -3 Pa, smelting temperature 2800℃, smelting 5 times, the raw materials can be smelted uniformly.

[0043] The prepared intermetallic compound rods are kept in a high temperature heat treatment furnace at 1200° C. for 12 hours and then cooled to room temperature with the furnace.

[0044] The test conditions for the mechanical properties of 33Ni-28Al-30Cr-4Mo-5V intermetallic compound are the same as those in Example 1, and its density is 6.15g / cm 3 Refer to Figure 3, where the yield strength at 25°C is 2150MPa and the compressive plasticity is greater than 25%; the yield strength at 600°C is 1200MPa and the compressive plasticity is greater than 40%; the yield strength ...

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Abstract

The present invention discloses one kind of V modified two-phase eutectic intermetallic NiAl-Cr(Mo) compound comprising Ni in 33 at.%, Cr in 30 at.%, Mo in 4 at.%, V in 1-16 at.% and Al for the rest. By means of lowering Al content in the two-phase eutectic intermetallic NiAl-Cr(Mo) alloy, and adding V element to modify and form one Heusler phase to reinforce the base and raise the high temperature performance, the V modified two-phase eutectic intermetallic NiAl-Cr(Mo) compound has high room temperature toughness and plasticity and further raised high temperature strength. The V modified two-phase eutectic intermetallic NiAl-Cr(Mo) compound has yield strength at 1150 deg.c of 120-150 MPa and density of 6.0-6.6 g/cu cm.

Description

technical field [0001] The invention relates to a V-modified NiAl-Cr(Mo) dual-phase eutectic intermetallic compound, in which there are NiAl phase, Cr(Mo) phase and Ni 2 AlV phase. Background technique [0002] At present, in the industrial fields of power, petrochemical, transportation, especially aviation and aerospace, the metal structural materials used above 600 °C are usually nickel-based, iron-based and cobalt-based superalloys. These materials have a higher density (generally at 8.0g / cm 3 Above), the components and equipment made are heavy. In order to reduce structural weight, improve efficiency, and reduce energy consumption, it is necessary to develop new high-temperature alloys with low density and high specific strength to meet the needs of future development in related industrial fields. What is more urgent is that currently the superalloys represented by Ni base and Co base are close to the limit temperature of their use due to the limitation of melting poin...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C1/02
Inventor 宫声凯刘先斌张志刚汤林志徐惠彬
Owner BEIHANG UNIV
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