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High-temperature softening resistant Cu-Ni-Sn series high-strength and high-elasticity copper alloy and preparation method thereof

A cu-ni-sn, copper alloy technology is applied in the field of Cu-Ni-Sn series high-strength and high-elasticity copper alloy and its preparation, which can solve problems such as unfavorable industrial production, energy saving and consumption reduction, and improve the insufficient softening resistance at high temperature. , Eliminate micro and macro segregation, and improve the effect of segregation problems

Inactive Publication Date: 2022-02-25
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the high content of Sn in Cu-Ni-Sn alloys, it is very easy to produce severe dendrite segregation when prepared by ordinary induction melting and casting methods. The follow-up requires high temperature and long-term homogenization treatment to improve, which is not conducive to industrial production and Requirements for energy saving and consumption reduction

Method used

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  • High-temperature softening resistant Cu-Ni-Sn series high-strength and high-elasticity copper alloy and preparation method thereof
  • High-temperature softening resistant Cu-Ni-Sn series high-strength and high-elasticity copper alloy and preparation method thereof
  • High-temperature softening resistant Cu-Ni-Sn series high-strength and high-elasticity copper alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Step 1. According to the alloy composition: 15wt.% Ni, 6wt.% Sn, 1.4wt.% Al, 0.5wt.% Zn, 0.5wt.% Si, and the balance is pure copper. Among them, the purity of Ni, Sn, Al, Zn, Si is 99.95wt.%. Put the prepared copper into the smelting crucible, put Ni, Sn, Al, commercially available Cu-5Zn intermediate alloy and Si elements on the feeding tray respectively; start smelting, when the pure copper is completely melted, put in pure nickel block, And add the covering agent mixture of high-quality charcoal and graphite flakes. At this time, the temperature is controlled at 1200-1300 ° C. When the pure nickel block is completely melted, keep it warm for 5-8 minutes, and fill the melt with argon or nitrogen to stir and remove it. Then add Si, Al, Sn, and Cu-Zn master alloy in sequence, after holding the temperature for 3 to 5 minutes, lower the temperature of the melt to 1150°C to prepare for upward continuous casting.

[0049] Step 2, using boron nitride material as the crystal...

Embodiment 2

[0055] Step 1. According to the alloy composition: 15wt.% Ni, 6wt.% Sn, 1.6wt.% Al, 0.8wt.% Zn, 0.6wt.% Nb, and the balance is pure copper. Among them, the purity of Ni, Sn, Al, Zn, and Nb is 99.95wt.%. Put the prepared copper into the melting crucible, put Ni, Sn, Al, Cu-5Zn intermediate alloy and Nb elements on the feeding tray respectively; start melting, when the pure copper is completely melted, put in pure nickel block, and add The covering agent mixture of high-quality charcoal and graphite flakes. At this time, the temperature is controlled at 1200-1300 ° C. When the pure nickel block is completely melted, keep it warm for 5-8 minutes, and fill it with nitrogen or argon to stir and degas the melt; Then add Nb, Al, Sn, and Cu-Zn intermediate alloy in sequence, after 3-5 minutes of heat preservation, the temperature of the melt is lowered to 1160°C to prepare for upward continuous casting.

[0056] Step 2, using boron nitride material as the crystallizer material, using...

Embodiment 3

[0061] Step 1, according to the alloy composition: 15wt.% of Ni, 4.8wt.% of Sn, 1.2wt.% of Al, 0.5wt.% of Zn, 0.5wt.% of Si, 0.5wt.% of Nb, remaining The amount is pure copper. Among them, the purity of Ni, Sn, Al, Zn, Si and Nb is 99.95wt.%. Put the prepared copper into the smelting crucible, put Ni, Sn, Al, Cu-Zn intermediate alloy, Si and Nb elements on the feeding tray respectively; start smelting, when the pure copper is completely melted, put in the pure nickel block, And add the covering agent mixture of high-quality charcoal and graphite flakes. At this time, the temperature is controlled at 1200-1300 °C. When the pure nickel block is completely melted, keep it warm for 5-8 minutes, and fill it with argon gas to stir and degas the melt. ; Then add Nb, Si, Al, Sn, and Cu-10Zn master alloy in sequence, keep the temperature for 3 to 5 minutes, and then lower the temperature of the melt to 1150°C to prepare for upward continuous casting.

[0062] Step 2, using boron nitr...

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Abstract

The invention discloses a high-temperature softening resistant Cu-Ni-Sn series high-strength and high-elasticity copper alloy and a preparation method thereof. The alloy comprises the following components such as Cu, Ni, Sn, Al, Zn, Si or Nb and inevitable impurity elements, and the contents of Ni, Sn, Al, Zn, Si or Nb elements are as follows: 12-18 wt% of Ni; 4.5-8.5 wt% of Sn; 0.5-2 wt% of Al; 0.3-1.0 wt% of Zn; 0.3-1.0 wt% of Si; and 0-1.0 wt% of Nb. The alloy preparation process comprises the steps of smelting, up-drawing continuous casting, homogenization and solution treatment, cold deformation treatment and aging treatment. The multi-component Cu-Ni-Sn series copper alloy prepared through adopting a short-process up-drawing continuous casting method is small in dendritic crystal spacing, high-melting-point second-phase particles can be separated out to occupy a nucleation position of discontinuous precipitation after large-deformation cold machining and combined deformation heat treatment processes, recrystallization reaction is promoted, and growth of the discontinuous precipitation is remarkably inhibited; therefore, the copper alloy with excellent high-temperature softening resistance, high strength, high elasticity and high wear resistance is prepared.

Description

technical field [0001] The invention belongs to the field of nonferrous metal processing, and relates to a Cu-Ni-Sn series high-strength and high-elastic copper alloy resistant to high temperature softening and a preparation method thereof. Background technique [0002] With the rapid development of the information industry and modern industry, copper and copper alloys are widely used, and the demand continues to rise. Copper and copper alloy materials have become one of the most important basic materials for national economic and social development. As one of the current advanced copper alloy materials, high-strength and high-elastic copper alloy materials are indispensable key materials for major scientific and technological projects in my country and the development and progress of various strategic emerging industries. They are widely used in new-generation information technology, energy-saving and new energy vehicles. , advanced rail transit equipment, aerospace equipmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/06C22C1/02C22C1/06B22D11/00C22F1/08
CPCC22C9/06C22C1/02C22C1/06B22D11/004C22F1/08
Inventor 郭诚君乐顺聪安桂焕肖翔鹏黄剑时雨凡
Owner JIANGXI UNIV OF SCI & TECH
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