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Fe-containing copper-based material with dispersion and precipitation strengthening functions and preparation method of Fe-containing copper-based material

A precipitation strengthening, copper-based technology, applied in the field of Fe-containing copper-based materials and their melting and casting preparation, can solve problems such as cracks, component failure, and elongation less than 10%, and achieve simple process, low cost and good repeatability Effect

Active Publication Date: 2022-07-29
DALIAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest challenge facing CuCrZr alloy as a heat sink material is the poor thermal stability of its precipitated phase
When the temperature rises to 450°C, the tensile strength of CuCrZr alloy will drop rapidly below 300MPa, and the elongation is less than 10%.
During the service process, the cooling water in the heat sink copper alloy tube is irradiated by neutrons. Under the combined action of high temperature and irradiated water, the surface of the tube will be severely oxidized and nano-porous, which will easily induce the occurrence and propagation of cracks, resulting in parts fail

Method used

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  • Fe-containing copper-based material with dispersion and precipitation strengthening functions and preparation method of Fe-containing copper-based material
  • Fe-containing copper-based material with dispersion and precipitation strengthening functions and preparation method of Fe-containing copper-based material
  • Fe-containing copper-based material with dispersion and precipitation strengthening functions and preparation method of Fe-containing copper-based material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1Cu-1wt%Cu 50 Fe 10 Zr 20 O 20 Alloy casting (ie 0.09 wt.% Fe and 0.3 wt.% Zr content)

[0026] Step 1. Preparation of Cu50 Fe 10 Zr 20 O 20 Master alloy powder (1kg)

[0027] With industrial pure Cu (>99.5%) metal and Fe (>99.9%), Zr (99.5%), Cu 2 O (99.9%) powder is used as raw material, and the atomic percentage component of weighing and preparation is Cu 50 Fe 10 Zr 20 O 20 1kg of alloy. The raw materials are mixed and placed in the crucible of the atomizing furnace, then evacuated to 2Pa, filled with industrial pure Ar gas of 0.1MPa for melting, the heating temperature of induction melting is 1200°C, and the holding time is 15min; after that, the atomization treatment is carried out with nitrogen gas. As the atomizing gas, the pressure of the atomizing gas is 5MPa, the diameter of the nozzle of the guide rod is 2mm, and the spherical alloy powder is obtained. Observing the powder sample by scanning electron microscope, it can be seen that the s...

Embodiment 2

[0030] Example 2Cu-3wt%Cu 50 Fe 15 Zr 15 O 15 Copper alloy casting (ie 0.4 wt.% Fe and 0.7 wt.% Zr content)

[0031] Step 1. Preparation of Cu 50 Fe 15 Zr 15 O 15 Master alloy powder (5kg)

[0032] With industrial pure Cu (>99.5%) metal and Fe (>99.9%), Zr (99.5%), Cu 2 O (99.9%) powder is used as raw material, and the atomic percentage component of weighing and preparation is Cu 50 Fe 15 Zr 15 O 15 5kg of alloy. The raw materials are mixed and placed in the crucible of the atomizing furnace, then evacuated to 1Pa, filled with industrial pure Ar gas of 0.08MPa for melting, the heating temperature of induction melting is 1250℃, and the holding time is about 15min; Nitrogen was used as the atomizing gas, the pressure of the atomizing gas was 10 MPa, the diameter of the nozzle of the guide rod was 3 mm, and spherical alloy powder was obtained. The powder samples were observed by scanning electron microscope, and it was known that the shape of the powder was spherica...

Embodiment 3

[0037] Example 3Cu-21wt%Cu 50 Fe 10 Zr 20 O 20 Copper alloy casting (ie 2 wt.% Fe and 6.5 wt.% Zr content)

[0038] Step 1. Preparation of Cu 50 Fe 10 Zr 20 O 20 Master alloy powder (2kg)

[0039] With industrial pure Cu (>99.5%) metal and Fe (>99.9%), Zr (99.5%), Cu 2 O (99.9%) powder is used as raw material, and the atomic percentage component of weighing and preparation is Cu 50 Fe 10 Zr 20 O 20 2kg of alloy. The raw materials are mixed and placed in the crucible of the atomizing furnace, then evacuated to 2Pa, filled with industrial pure Ar gas of 0.1MPa for melting, the heating temperature of induction melting is 1200°C, and the holding time is 15min; after that, the atomization treatment is carried out with nitrogen gas. As the atomizing gas, the pressure of the atomizing gas was 8 MPa, the diameter of the nozzle of the guide rod was 3 mm, and the spherical alloy powder was obtained. The powder samples were observed by scanning electron microscope, and it w...

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Abstract

The preparation method comprises the following steps: firstly, preparing a copper-based alloy powder intermediate material which contains a ZrO2 and Fe-containing precipitated phase mixture and has the specific gravity close to that of a matrix alloy by adopting induction melting and melt atomization technologies; then, selecting intermediate material powder with a certain size, and preparing a target alloy with the intermediate material powder and industrial pure copper as raw materials; and finally, the induction melting technology is adopted, and casting is conducted to prepare the kilogram-level Fe-containing copper-based alloy with the dispersion and precipitation double-strengthening characteristics. The Fe-containing copper-based material is characterized in that nano ZrO2 oxides and Fe-containing precipitated phase particles with different number densities are uniformly and dispersedly distributed on a copper alloy matrix. The synthesized novel Fe-containing corrosion-resistant copper alloy material has the performance of DS-Cu and the advantages of a PH-Cu preparation technology, the cost is low, repeatability is good, and the size and content of oxide particles and precipitated phases can be effectively regulated and controlled; the whole technological process is simple, efficient and controllable, and industrial large-scale production is easy to implement.

Description

technical field [0001] The invention relates to a Fe-containing copper-based material with both dispersion and precipitation strengthening and a method for preparing it by melting and casting, belonging to the field of metal-based composite material preparation. Background technique [0002] High-strength and high-conductivity copper alloy materials have a wide range of applications in nuclear fusion, aerospace, rail transit, and integrated circuits. High-strength and high-conductivity copper alloys mainly include dispersion-strengthened copper (DS-Cu) alloys and precipitation-strengthened copper (PH-Cu) alloys. [0003] DS-Cu obtains dispersion strengthening by dispersing ceramic particles (such as oxides, carbides, etc.) with high melting point, high hardness and high chemical inertness in Cu by in-situ or ex-situ methods. There are many kinds of dispersion strengthening phases of DS-Cu, including oxides (Al 2 O 3 , (Y,La,Ce,Gd) 2 O 3 , ZrO 2 etc.), carbides (WC, VC,...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C1/10C22C1/02C22C32/00B22F9/08
CPCC22C9/00C22C1/02C22C1/1036C22C32/0021B22F9/082
Inventor 王英敏张吉亮羌建兵张骏峰陈旭洲朱颉冯凯霖魏明玉房灿峰
Owner DALIAN UNIV OF TECH