A kind of cupronickel tube used in marine engineering and its preparation method

A technology for marine engineering and cupronickel pipes, applied in the field of cupronickel alloys, which can solve the problems of low plasticity, difficulty in adapting to the coil drawing production method, and limited service life of copper-nickel alloy materials, and achieve excellent conductivity, excellent mechanical properties, and seawater resistance. and the effect of erosion corrosion

Inactive Publication Date: 2016-01-20
江西九星铜业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a white copper pipe used in marine engineering and its preparation method, so that it has strong seawater corrosion resistance; at the same time, it solves the problem that the traditional copper-nickel alloy material has limited life and is difficult to adapt to the plate due to its low plasticity. Pipe stretching production methods and other issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] By weight percentage, its chemical composition and content are as follows:

[0044] Nickel Ni: 23; Zinc Zn: 3.0; Cobalt Co: 3.0; Iron Fe: 1.5; Manganese Mn: 2.0; Aluminum Al: 1.6; Tin Sn: 0.4; Titanium Ti: 0.2; ; Copper Cu: balance.

[0045] According to the above-mentioned alloy composition, firstly, put the copper raw material into the power frequency induction furnace, and cover it with charcoal covering agent; then, raise the temperature of the furnace to 1350°C, and add iron, cobalt, nickel, titanium after all the furnace materials are melted, and then Add master alloys in sequence: aluminum-copper, manganese-copper, zinc-copper, tin-copper, and add master alloys: boron-copper and Cu-10wt%RE 10 minutes before leaving the furnace; finally, adjust the composition and inject the copper alloy molten metal into the crystallizer Preparation of cupronickel tube blanks.

[0046] In this embodiment, the production method of horizontal continuous casting→pipe blank milling...

Embodiment 2

[0049] By weight percentage, its chemical composition and content are as follows:

[0050] Nickel Ni: 22.5; Zinc Zn: 2.5; Cobalt Co: 2.5; Iron Fe: 1.3; Manganese Mn: 1.5; Aluminum Al: 1.4; Tin Sn: 0.35; Titanium Ti: 0.15; ; Copper Cu: balance.

[0051] According to the above-mentioned alloy composition, first, put the copper raw material into the power frequency induction furnace, and cover it with charcoal covering agent; then, raise the temperature of the furnace to 1360°C, and add iron, cobalt, nickel, titanium after all the furnace materials are melted, and then Add master alloys in sequence: aluminum-copper, manganese-copper, zinc-copper, tin-copper, and add master alloys: boron-copper and Cu-10wt%RE 8 minutes before leaving the furnace; finally, adjust the composition and inject the copper alloy molten metal into the crystallizer Preparation of cupronickel tube blanks.

[0052] In this embodiment, the production method of horizontal continuous casting→pipe blank millin...

Embodiment 3

[0055] By weight percentage, its chemical composition and content are as follows:

[0056] Nickel Ni: 24.0; zinc Zn: 4.0; cobalt Co: 4.0; iron Fe: 2.0; manganese Mn: 3.0; aluminum Al: 2.0; tin Sn: 0.5; titanium Ti: 0.3; boron B: 0.01; ; Copper Cu: balance.

[0057] According to the above-mentioned alloy composition, first, put the copper raw material into the power frequency induction furnace, and cover it with charcoal covering agent; then, raise the temperature of the furnace to 1380°C, and add iron, cobalt, nickel, titanium after all the furnace materials are melted, and then Add master alloys in sequence: aluminum-copper, manganese-copper, zinc-copper, tin-copper, and add master alloys: boron-copper and Cu-10wt%RE 12 minutes before leaving the furnace; finally, adjust the composition and inject the copper alloy molten metal into the crystallizer Preparation of cupronickel tube blanks.

[0058] In this embodiment, the production method of horizontal continuous casting→pip...

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Abstract

The invention relates to the field of cupronickel pipes, and in particular relates to a cupronickel pipe for the ocean engineering and a manufacturing method thereof. The cupronickel pipe comprises the following chemical components by weight percent: 22.0 to 24.0 percent of nickel (Ni), 2.0 to 4.0 percent of zinc (Zn), 2.0 to 4.0 percent of cobalt (Co), 1.0 to 3.0 percent of manganese (Mn), 1.0 to 2.0 percent of iron (Fe), 1.0 to 2.0 percent of aluminum (Al), 0.3 to 0.5 percent of tin (Sn), 0.1 to 0.3 percent of titanium (Ti), 0.005 to 0.01 percent of boron (B), 0.05 to 0.15 percent of rare earth (RE) and the balance of copper (Cu). After a cupronickel pipe blank is obtained by adopting an induction smelting way, the cupronickel pipe blank is subjected to coil drawing, namely horizontal continuous casting, pipe blank surface milling, planetary rolling through three rollers, straight drawing through three continuous drawing machines, inverted coil drawing, refining rewinding, annealing and finished product inspection. The cupronickel pipe for the ocean engineering is strong in seawater corrosion resistance. Meanwhile, the problems that the traditional copper-nickel alloy material is short in service life and cannot adapt to the coil drawing production way due to the low plasticity can be solved, and the coil drawing of the cupronickel pipe can be realized.

Description

technical field [0001] The invention relates to the field of white copper alloys, in particular to a white copper pipe used in marine engineering and a preparation method thereof. Background technique [0002] With the development of the marine industry and the process of strengthening the naval construction, the demand for copper and copper alloy condenser pipes is growing rapidly. In 2011, the domestic demand for high-precision copper and copper-nickel alloy pipes in the three industries of electric power, shipbuilding, and seawater desalination has reached 60,000 tons. The demand for high-precision copper and copper alloy pipes in the domestic market will continue to grow. It is expected that By 2015, domestic demand will exceed 100,000 tons. [0003] At present, BFe30-1-1 and BF10-1-1 are mainly used as materials for ship condenser tubes. Among them, BFe30-1-1 iron-nickel copper is a structural copper-nickel alloy with good mechanical properties and high corrosion resi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/06C22C1/03B23P15/00
Inventor 李文君刘刚王瑛
Owner 江西九星铜业有限公司
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