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Homogenized copper-nickel-tin alloy rod and preparation method thereof

A technology of alloy rods and copper-nickel-tin, which is applied in the field of homogenized copper-nickel-tin alloy rods and its preparation, can solve the problems of cumbersome alloy process, immature preparation technology, and no application, and achieve short process routes, Effect of reducing macro segregation and reducing micro segregation

Active Publication Date: 2021-05-25
JIANGSU LONGDA SUPERALLOY MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Equacast is mostly used in foreign countries, and this technology has been blocked, and there is no application in this area in China.
However, the domestic advanced preparation technology is not mature, and the process of preparing alloys by powder metallurgy is cumbersome.

Method used

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  • Homogenized copper-nickel-tin alloy rod and preparation method thereof
  • Homogenized copper-nickel-tin alloy rod and preparation method thereof
  • Homogenized copper-nickel-tin alloy rod and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of a homogenized copper-nickel-tin alloy bar comprises the steps:

[0022] (1) Ingredients step: In terms of mass percentage, Zn is 0.026%, Sn is 7.9%, Nb is 0.03%, Ni+Co is 14.8%, Fe is 0.01%, Mg is 0.001%, and the rest is Cu, and Co It accounts for 0.1% of the total mass of Ni+Co.

[0023] (2) Melting step: use a vacuum induction furnace for melting, first add the raw materials prepared according to the formula in step (1): Cu, Sn, Nb, Fe and the remainder of Ni into the crucible, vacuumize to below 10Pa and start heating Refining is carried out until the alloy is completely melted, the refining temperature is controlled at 1350°C, the refining time is controlled at 5min, filled with argon, and then Ni-Mg alloy (in Ni-Mg alloy, the mass ratio of Ni to Mg is 3:1) is added In the alloy melt, wait for it to dissolve and keep warm for 3 minutes. After the ingot is poured, the vacuum is broken immediately, and the ingot is cooled rapidly by air cooli...

Embodiment 2

[0031] A preparation method of a homogenized copper-nickel-tin alloy bar comprises the steps:

[0032] (1) Ingredients step: In terms of mass percentage, Zn is 0.01%, Sn is 8.2%, Nb is 0.05%, Ni+Co15.0%, Fe is 0.02%, Mg is 0.008%, the rest is Cu, and Co It accounts for 3.0% of the total mass of Ni+Co.

[0033] (2) Melting step: use a vacuum induction furnace for melting, first add the raw materials prepared according to the formula in step (1): Cu, Sn, Nb, Fe and the remainder of Ni into the crucible, vacuumize to below 10Pa and start heating Refining until the alloy is completely melted, the refining temperature is 1300°C, the refining time is 6min, filled with argon, and then the Ni-Mg alloy (in the Ni-Mg alloy, the mass ratio of Ni to Mg is 4:1) is added to the alloy melt , to be cleared, keep warm for 3 minutes, after the ingot is poured, immediately break the vacuum, and use the air cooling method to quickly cool the ingot;

[0034] (3) Homogenization treatment step: re...

Embodiment 3

[0041] A preparation method of a homogenized copper-nickel-tin alloy bar comprises the steps:

[0042] (1) Ingredients: In terms of mass percentage, Zn is 0.02%, Sn is 8.0%, Nb is 0.02%, Ni+Co is 15.1%, Fe is 0.02%, and Mg is 0.015%. The rest is Cu, and Co accounts for 5.0% of the total mass of Ni+Co.

[0043] (2) Melting: use a vacuum induction furnace for melting, first add the raw materials prepared according to the formula in step (1): Cu, Sn, Nb, Fe and the rest of Ni into the crucible, vacuumize to below 10Pa and start heating to The alloy is completely melted and refined, the refining temperature is 1310°C, the refining time is 5min, filled with argon, and then the Ni-Mg alloy (in the Ni-Mg alloy, the mass ratio of Ni to Mg is 3.5:1) is added to the alloy melt, To be clear, keep warm for 3min. After the ingot is poured, the vacuum is broken immediately, and the ingot is cooled rapidly by air cooling;

[0044] (3) Homogenization treatment: Remove the riser and shrinka...

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Abstract

The invention relates to a homogenized copper-nickel-tin alloy rod and a preparation method thereof. The formula is as follows in terms of mass percentage: Zn is 0.01%-0.026%, Sn is 7.9%-8.2%, Nb is 0.02%-0.05%, Ni+Co is 14.0%‑16.0%, Fe is 0.01%‑0.02%, Mg is 0.01%‑0.15%, the rest is Cu, and Co accounts for 0%‑5.0% of the total mass of Ni+Co. The preparation method includes batching, smelting, homogenization treatment, forging, aging treatment and grinding steps. The hardness of the bar of the present invention is HRC≥35, and the tensile strength σ b ≥998Mpa, yield strength σ 0.2 ≥950Mpa, elongation δ≥6%, good uniformity of chemical composition of the bar, short production process and low manufacturing cost.

Description

technical field [0001] The invention relates to a homogenized copper-nickel-tin alloy rod and a preparation method thereof, and belongs to the technical field of metal casting and processing. Background technique [0002] Traditional beryllium bronze is an elastic alloy with excellent comprehensive properties, but its production and application are restricted due to its high production cost and the presence of toxic pollutants in the production process, which seriously endanger the environment and the health of production personnel. Therefore, there is an urgent need to develop a new material that can replace this beryllium bronze in performance and will not produce toxic pollutants during the lifting process. However, some copper-nickel-tin alloys have been identified as ideal replacement materials with similar properties to beryllium copper. Copper-nickel-tin alloy is an amplitude-modulated decomposition-strengthened alloy. Its mechanical and physical properties are equi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/06C22C1/03C22F1/08
CPCC22C1/03C22C9/06C22F1/08
Inventor 李淑苹李华兵王博熊兰兰董鸿志王颜臣
Owner JIANGSU LONGDA SUPERALLOY MATERIAL CO LTD
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