Seawater-erosion-resistant machining copper alloy and preparation method thereof

A technology for processing copper and seawater resistance, which is applied in the field of marine engineering and marine equipment, which can solve the problems affecting the normal use of equipment, the reduction of ship voyage rate, and the leakage of seawater pipelines, so as to improve the hardness, reduce the porosity and reduce the residual stress. Effect

Active Publication Date: 2017-12-15
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Frequent leakage of seawater pipelines will seriously affect the normal use of equipment, reduce the ship's voyage rate, and increase the hidden danger of accidents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A processed copper alloy for seawater erosion resistance, which contains elemental components and corresponding mass percentages of 0.5% Ni, 2.0% Al, 1.0% Mg, 0.05% P, 0.15% Cr and 0.01% % Sn, the balance is copper and unavoidable impurity elements.

[0033] The preparation method of the above seawater erosion-resistant processed copper alloy material comprises the following steps:

[0034] (1) Ingredients

[0035] According to the mass percentage of the above elements, the following raw materials are taken: electrolytic Ni, wherein the mass percentage of Ni is ≥99.9%; pure Mg, wherein the mass percentage of Mg is ≥99.9%; electrolytic Cu, wherein the mass percentage of Cu is ≥99.9% ; Master alloy CuP1.5, wherein the mass percentage of P is ≥1.49%, and the balance is copper; pure Cr, wherein the mass percentage of Cr is ≥99.9%; pure Sn, wherein the mass percentage of Sn is ≥99.95%.

[0036] (2) Melting

[0037] The intermediate frequency ironless induction furnace is ...

Embodiment 2

[0048] A processed copper alloy for resistance to seawater erosion, which contains elemental components and corresponding mass percentages of 2.75% Ni, 3.5% Al, 1.5% Mg, 0.08% P, 0.5% Cr and 0.015% % Sn, the balance is copper and unavoidable impurity elements.

[0049] According to the mass percentage of the above elements, the following raw materials are taken: electrolytic Ni, wherein the mass percentage of Ni is ≥99.9%; pure Mg, wherein the mass percentage of Mg is ≥99.9%; electrolytic Cu, wherein the mass percentage of Cu is ≥99.9% ; Master alloy CuP1.5, wherein the mass percentage of P is ≥1.49%, and the balance is copper; pure Cr, wherein the mass percentage of Cr is ≥99.9%; pure Sn, wherein the mass percentage of Sn is ≥99.95%.

[0050] Utilize above-mentioned raw material to prepare the processing copper alloy that is resistant to seawater erosion, the preparation method is roughly the same as the preparation method described in Example 1, the difference is: the coveri...

Embodiment 3

[0052] A processed copper alloy for seawater erosion resistance, which contains elemental components and corresponding mass percentages of 5.0% Ni, 5.0% Al, 2.5% Mg, 0.075% P, 0.85% Cr and 0.02% % Sn, the balance is copper and unavoidable impurity elements.

[0053] According to the mass percentage of the above elements, the following raw materials are taken: electrolytic Ni, wherein the mass percentage of Ni is ≥99.9%; pure Mg, wherein the mass percentage of Mg is ≥99.9%; electrolytic Cu, wherein the mass percentage of Cu is ≥99.9% ; Master alloy CuP1.5, wherein the mass percentage of P is ≥1.49%, and the balance is copper; pure Cr, wherein the mass percentage of Cr is ≥99.9%; pure Sn, wherein the mass percentage of Sn is ≥99.95%.

[0054] Utilize above-mentioned raw material to prepare the processing copper alloy that is resistant to seawater erosion, the preparation method is roughly the same as the preparation method described in Example 1, the difference is: the covering ...

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Abstract

The invention relates to the fields of oceanographic engineering and offshore equipment, and particularly discloses seawater-erosion-resistant machining copper alloy and a preparation method thereof. The copper alloy is composed of, by mass, 0.5-5% of nickel, 2-5% of aluminum, 1-2.5% of magnesium, 0.05-0.15% of phosphorus, 0.15-0.85% of chromium, 0.01-0.02% of tin and the balance copper. During preparation, a medium-frequency iron-core-free induction furnace is adopted, roasting and preheating are conducted to make raw materials be in dark red, and a furnace pipe is formed; the temperature is increased; electrolytic copper, a covering agent, pure chromium, electrolytic nickel, electrolytic aluminum, pure magnesium, pure tin, a covering agent and alloy CuP are sequentially added; stirring and slag salvage are conducted, the temperature is increased, and alloy is discharged out of the furnace and smelted in the atmospheric environment; and annealing is conducted. The preparation method is low in cost and high in product hardness, and the prepared copper alloy has the properties such as seawater-high-flow-rate-erosion resistance and erosion corrosion resistance, and can be used as a structural material, making contact with seawater, such as propellers of oceanographic engineering, pipes for oceanographic engineering pipelines and valve bodies.

Description

technical field [0001] The invention relates to the field of marine engineering and marine equipment, in particular to a processed copper alloy resistant to seawater erosion and a preparation method thereof. Background technique [0002] In marine engineering, since the pipelines of ship seawater system are in direct contact with seawater and are mostly arranged in the bilge, the working environment is harsh, and the problem of corrosion by seawater has always been a prominent problem restricting its maximum performance. In ships, pumps, valve bodies, pipes and blade propellers for marine pipeline installations have relatively high requirements for corrosion resistance. Among the metal components in the marine environment, the failure types mainly include erosion corrosion, uniform corrosion, localized corrosion, cavitation corrosion, etc. These failure types are often related to the material’s service environment, stress conditions, structural design or metallurgical factor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/06C22C9/01C22C9/00C22C1/03
CPCC22C1/03C22C9/00C22C9/01C22C9/06
Inventor 田保红张毅乔景振刘勇宋克兴贾淑果周延军张彦敏张学宾国秀花
Owner HENAN UNIV OF SCI & TECH
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