Method for preparing single crystal 85Cu-15Sn alloy through spiral crystal selection

An 85cu-15sn, spiral selection technology, applied in the direction of single crystal growth, single crystal growth, chemical instruments and methods, etc., can solve the problems of poor plasticity, serious segregation of copper-tin alloys, easy to break cores, etc., to eliminate crack propagation. , Excellent comprehensive performance, the effect of eliminating lateral grain boundaries

Active Publication Date: 2022-04-29
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing single crystal 85Cu-15Sn alloy by spiral crystal selection, which eliminates the transverse grain boundary and solves the problem of copper-tin alloy prepared by traditional casting method. Severe segregation, poor plasticity and easy core breakage in the process of preparing superconducting wires

Method used

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  • Method for preparing single crystal 85Cu-15Sn alloy through spiral crystal selection
  • Method for preparing single crystal 85Cu-15Sn alloy through spiral crystal selection
  • Method for preparing single crystal 85Cu-15Sn alloy through spiral crystal selection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 80wt.% of Cu block and 20wt.% of Sn particles in turn, use 200# sandpaper to polish the oxide skin on the surface of the copper block, then put the surface-treated copper block into the ultrasonic cleaner, and add Wash with an appropriate amount of absolute ethanol for 20 minutes. After cleaning, take out the copper block and dry it;

[0032] Put the weighed materials into the induction coil of the directional solidification furnace in turn, check whether the casting position of the coil is aligned with the guide tube, fix the spiral crystal selector and check whether the guide tube and the spiral crystal selector are aligned, figure 1 The crystal selection principle of the crystal selector is shown, and finally the furnace door is closed;

[0033] Use mechanical pump, Roots pump and diffusion pump to vacuum the furnace to 6×10 -3 Pa, start the induction power supply to heat the material, and the power of the power supply increases by 1KW every 10 minutes. After ...

Embodiment 2

[0036] Weigh 83wt.% of Cu block and 17wt.% of Sn particles in turn, use 200# sandpaper to polish the oxide skin on the surface of the copper block, then put the surface-treated copper block into the ultrasonic cleaner, and add Clean with an appropriate amount of absolute ethanol for 25 minutes. After cleaning, take out the copper block and dry it;

[0037] Put the weighed materials into the induction coil of the directional solidification furnace in turn, check whether the casting position of the coil is aligned with the guide tube, fix the spiral crystal selector and check whether the guide tube and the spiral crystal selector are aligned, figure 1 The crystal selection principle of the crystal selector is shown, and finally the furnace door is closed;

[0038] Use mechanical pump, Roots pump and diffusion pump to vacuum the furnace to 6×10 -3 Pa, start the induction power supply to heat the material, the power of the power supply is increased by 2KW every 20min, and when th...

Embodiment 3

[0041]Weigh 86wt.% of Cu block and 14wt.% of Sn particles in turn, use 200# sandpaper to polish the oxide skin on the surface of the copper block, then put the surface-treated copper block into the ultrasonic cleaner, and add Clean with an appropriate amount of absolute ethanol for 30 minutes. After cleaning, take out the copper block and dry it;

[0042] Put the weighed materials into the induction coil of the directional solidification furnace in turn, check whether the casting position of the coil is aligned with the guide tube, fix the spiral crystal selector and check whether the guide tube and the spiral crystal selector are aligned, figure 1 The crystal selection principle of the crystal selector is shown, and finally the furnace door is closed;

[0043] Use mechanical pump, Roots pump and diffusion pump to vacuum the furnace to 6×10 -3 Pa, start the induction power supply to heat the material, the power of the power supply is increased by 3KW every 30min, and when the...

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Abstract

The invention discloses a method for preparing a single crystal 85Cu-15Sn alloy through spiral crystal selection, a directional solidification furnace is utilized, the CuSn single crystal alloy is prepared through the spiral crystal selection method, and the directional solidification furnace comprises a crystallization rod and a spiral crystal selector; the spiral crystal selector is fixed on the crystallization rod; through directional solidification, the front edge of an alloy solidification interface has a high temperature gradient, directional crystal generation is facilitated, the single-crystal Cu-15Sn alloy is prepared through a spiral crystal selection method, the copper-tin alloy consistent in grain orientation is obtained, the alloy has a large elastic modulus in the same grain growth direction, transverse grain boundaries are eliminated, and the mechanical properties of the alloy are improved. The main conditions of crack propagation are eliminated, the problems of solute segregation and poor plasticity of the copper-tin alloy prepared through a traditional casting method are solved, and the obtained copper-tin alloy is uniform in structure distribution and excellent in comprehensive performance.

Description

technical field [0001] The invention belongs to the technical field of single crystal copper alloy preparation and relates to a method for preparing single crystal 85Cu-15Sn alloy by spiral crystal selection. Background technique [0002] Copper alloys are widely used in communication cables, conductive components, precision circuits and other fields because of their excellent electrical and thermal conductivity, and good ductility. Among them, copper-tin alloys are used as large scientific devices such as thermonuclear fusion reactors and high-field nuclear magnetic resonance instruments. The key raw materials of superconducting wires have become research hotspots at home and abroad. Copper-tin alloys prepared by traditional casting methods are used in the preparation of superconducting wires (including Nb 3 Sn, etc.) need to undergo repeated cluster drawing to obtain kilometer-level long wires. The copper-tin alloy prepared by the traditional casting method is subjected t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B15/00C30B15/20C30B29/52C22C9/02
CPCC30B15/00C30B15/20C30B29/52C22C9/02
Inventor 邹军涛宋大拙张志伟梁淑华
Owner XIAN UNIV OF TECH
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