Seawater scouring corrosion resistant nickel-copper alloy and tubular product and preparation method thereof

A copper-nickel alloy, scouring and corrosion technology, applied in the direction of pipeline protection, mechanical equipment, pipes/pipe joints/pipe fittings, etc., can solve the problems of increasing project investment, damage and fracture caused by titanium hydrogen, and achieve expanded application and improved durability Erosion corrosion performance, effect of low corrosion rate

Inactive Publication Date: 2010-06-02
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result of this, on the one hand, the project investment has been increased, and other problems will also app...

Method used

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  • Seawater scouring corrosion resistant nickel-copper alloy and tubular product and preparation method thereof
  • Seawater scouring corrosion resistant nickel-copper alloy and tubular product and preparation method thereof
  • Seawater scouring corrosion resistant nickel-copper alloy and tubular product and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] A corrosion-resistant copper-nickel alloy, the components are 7% nickel, 6% tin, 4% zinc, the impurity content is not more than 0.5%, and the balance is copper. The process of making the pipe is as follows: First, through the alloy design, the ingredients are proportioned according to the above component ratios, and after horizontal continuous casting, a pipe blank with an outer diameter of 80mm and a thickness of 20mm is prepared, and after homogenization heat treatment at 650°C for 6 hours, the outer shell is obtained after peeling. The pipe blank with a diameter of 79.5m and a thickness of 19mm is stretched, and three times of intermediate annealing is used to soften and stretch. The annealing process is an annealing temperature of 450-500°C, annealing time of 4.5 hours, and then the finished product is stretched. The outer diameter of the finished pipe is 30mm. The thickness is 2mm, and finally cut and packaged to form a finished product.

Embodiment 2

[0032] A corrosion-resistant copper-nickel alloy, the components are 10% nickel, 6% tin, 2% zinc, 2% iron, 1% cerium, the impurity content is not more than 0.5%, and the balance is copper. The process of making the pipe is as follows: First, through the alloy design, according to the proportion of the above components, the tube blank with an outer diameter of 80mm and a thickness of 20mm is prepared after horizontal continuous casting, and after homogenization heat treatment at 650°C for 6 hours, the outer diameter after peeling is 79.5mm. mm, thickness 19mm tube blank, stretching, using 3 times of intermediate annealing to soften and stretch, the annealing process is annealing temperature 450-500 ℃, annealing time 4.5 hours, and then the finished product is stretched, the outer diameter of the finished pipe is 30mm, the thickness is 2mm , and finally cut and packaged to form a finished product.

Embodiment 3

[0034] A corrosion-resistant copper-nickel alloy, the components are 5% nickel, 3% tin, 6% zinc, 2% iron, 2% lanthanum, the impurity content is not more than 0.5%, and the balance is copper. The process of making the pipe is as follows: First, through the alloy design, according to the proportion of the above components, the tube blank with an outer diameter of 80mm and a thickness of 20mm is prepared after horizontal continuous casting, and after homogenization heat treatment at 650°C for 6 hours, the outer diameter after peeling is 79.5mm. mm, thickness 19mm pipe blank, stretching, using 3 times of intermediate annealing to soften and stretch, the annealing process is annealing temperature 450-500 ℃, annealing time 4.5 hours, and then the finished product is stretched, the outer diameter of the finished pipe is 30mm, the thickness is 2mm , and finally cut and packaged to form a finished product.

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Abstract

The invention relates to a seawater scouring corrosion resistant nickel-copper alloy and a tubular product and a preparation method thereof, belonging to the technical field of metallic material alloying and material corrosion prevention. The nickel-copper alloy tubular product consists of the nickel-copper alloy, and the nickel-copper alloy contains the following components in weight ratio: 5-15 percent of nickel, 2-8 percent of stannum, 1-6 percent of zinc, 0-3 percent of ferrum, 0-2 percent of rare earth elements, not more than 0.5 percent of impurities and the balance of copper. On one hand, the nickel-copper alloy improves the strength and the hardness of the alloy so as to ensure the seawater scouring corrosion resistance of the nickel-copper alloy, on the other hand improves the electrochemical corrosion resistance of the alloy; compared with the common nickel-copper alloy, the 4.5m/s seawater scouring corrosion resistance of the nickel-copper alloy tubular product is higher, and the corrosion rate is lower, thereby realizing that the material cost is reduced and the cost performance is improved, and enlarging the application of the nickel-copper alloy in the fields of condensation tubes and heat-exchanger tubes.

Description

technical field [0001] The invention relates to a copper-nickel alloy resistant to seawater erosion and corrosion, its pipe material and a preparation method, and belongs to the technical field of metal material alloying and material anticorrosion. Background technique [0002] Copper-nickel alloy is known for its resistance to seawater corrosion, and is the leader among copper alloys in marine engineering. Although the two main alloying elements in the copper-nickel alloy are infinitely soluble, there is spinodal decomposition in the Cu-Ni-Fe alloy system. Under certain conditions, the second phase precipitates in the grain or grain boundary of the alloy. , which significantly affects the mechanical properties of copper-nickel alloys, and also has a great impact on the corrosion resistance of the material. [0003] The impact corrosion resistance of flowing seawater and the immersion corrosion resistance of static seawater are two different properties, and they are both im...

Claims

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Application Information

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IPC IPC(8): C22C9/06F16L58/00
Inventor 赵月红林乐耘王振海高发
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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