Preparation method of high-strength corrosion-resistant copper pipe for heat exchanger

A heat exchanger and high-strength technology, applied in the field of pipes, can solve problems affecting cold processing, poor production continuity, complicated production procedures, etc., and achieve the effects of improving working life, increasing production capacity, and shortening smelting time

Active Publication Date: 2013-10-09
山东兴鲁有色金属集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are: (1) The production process is complicated, there are many auxiliary facilities, the maintenance cost of the mold is high, the floor area is large, the personnel requirements are high, and the quality requirements are high; (2) The investment scale is large, ranging from hundreds of millions to hundreds of millions (3) The secondary heating of the round billet requires extrusion molding, extruding the cylinder, the needle, and preheating before work, etc. High energy consumption; (4) Stirring, ingot casting, sawing, heating, pressing, peeling,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0013] Example 1

[0014] A preparation method of a high-strength corrosion-resistant copper tube for a heat exchanger. The copper tube components are as follows by weight: 0.5-0.6% of magnesium, 0.08-0.09% of silver, 0.2-0.4% of tin, 0.012-0.014% of zirconium, and 0.012-0.012% of niobium. 0.014%, nickel 0.05-0.06%, titanium 0.005-0.008%, misch metal 0.02-0.04%, the remainder is copper, copper preferably content ≥ 99.95% cathode copper, misch metal is composed of yttrium, bercylium and lanthanum. The mass ratio is 1:0.2:0.5; the preparation steps are as follows:

[0015] (1) Divide the copper material and each alloy metal into multiple parts, and evenly put them into the submerged electromagnetic stirring power frequency induction combined electric furnace at proportional intervals to smelt into molten liquid, and the copper liquid is covered with charcoal, and argon gas is introduced to form an atmosphere protection, and then cooled by the mold and drawn out by the pulling d...

Example Embodiment

[0018] Example 2

[0019] A preparation method of a high-strength corrosion-resistant copper tube for a heat exchanger. The copper tube components are as follows by weight: 0.5-0.6% of magnesium, 0.08-0.09% of silver, 0.2-0.4% of tin, 0.012-0.014% of zirconium, and 0.012-0.012% of niobium. 0.014%, nickel 0.05-0.06%, titanium 0.005-0.008%, mixed rare earth 0.02-0.04%, silicon carbide 0.008-0.009%, the remainder is copper, the copper content is preferably ≥99.95% cathode copper, mixed rare earth is composed of yttrium, bercylium It is composed of lanthanum and lanthanum, and the mass ratio of the three is 1:0.15:0.4; silicon carbide selects α-SiC particles with a particle size of 8-10 μm, and the preparation steps are as follows:

[0020] (1) Divide the copper material and each alloy metal into multiple parts, and evenly put them into the submerged electromagnetic stirring power frequency induction combined electric furnace at proportional intervals to smelt into molten liquid, ...

Example Embodiment

[0023] Example 3

[0024] A preparation method of a high-strength corrosion-resistant copper tube for a heat exchanger. The copper tube components are as follows by weight: 0.5-0.6% of magnesium, 0.08-0.09% of silver, 0.2-0.4% of tin, 0.012-0.014% of zirconium, and 0.012-0.012% of niobium. 0.014%, nickel 0.05-0.06%, titanium 0.005-0.008%, mixed rare earth 0.02-0.04%, four-needle zinc oxide whiskers 0.010-0.012%, the remainder is copper, preferably copper cathode copper content ≥ 99.95%, mixed The rare earth is composed of yttrium, bercylium and lanthanum, and the mass ratio of the three is 1:0.2:0.5; the four-needle zinc oxide whiskers are preferably four-needle zinc oxide whiskers with a length of 10-12 μm and a root diameter of 1-1.5 μm , the preparation steps are as follows:

[0025] (1) Divide the copper material and each alloy metal into multiple parts, and evenly put them into the submerged electromagnetic stirring power frequency induction combined electric furnace at ...

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PUM

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Abstract

The invention discloses a preparation method of a high-strength corrosion-resistant copper pipe for a heat exchanger. The high-strength corrosion-resistant copper pipe comprises a copper matrix and alloy metals. The alloy metals comprise, by weight, 0.5-0.6% of magnesium, 0.08-0.09% of silver, 0.2-0.4% of tin. 0.012-0.014% of zirconium, 0.012-0.014% of niobium, 0.05-0.06% of nickel, 0.005-0.008% of titanium and 0.02-0.04% of mischmetal. The mischmetal comprises yttrium, berkelium and lanthanum according to a mass ratio of 1: (0.15-0.2): (0.4-0.5). The preparation method utilizes upward continuous casting, rolling and drawing processes to replace casting, sawing, heating, extrusion and pickling processes of the traditional preparation method so that processes are greatly simplified, continuous production is realized, a period is short, and efficiency is high. A copper pipe prepared by the preparation method has oxygen content satisfying the oxygen-free copper level standard, has fine grains, and has mechanical strength, high temperature resistance, corrosion resistance and wear resistance obviously superior to the same performances of the existing copper pipe.

Description

technical field [0001] The invention relates to the field of pipe materials, in particular to a method for preparing high-strength corrosion-resistant copper pipes for heat exchangers. Background technique [0002] At present, with the development of power stations, ships, and refrigeration industries, it is necessary to find a heat exchange tube material with good corrosion resistance and processing performance. The original heat exchange tubes were mostly brass tubes, high nickel white copper tubes or red copper tubes. However, brass tubes, high-nickel white copper tubes and red copper tubes all have their shortcomings, which are described as follows: brass tubes are relatively low in cost, but their corrosion resistance and processing performance are not as good as those of white copper tubes. Generally, it takes about three years Repair and replace a batch. The maintenance cost of power station and ship shutdown is high, and the refrigeration shutdown maintenance has a...

Claims

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Application Information

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IPC IPC(8): C22C9/00B22D11/14C22F1/08B21C37/06
Inventor 燕志富孟文光李忠茂徐祥思玄秀芹
Owner 山东兴鲁有色金属集团有限公司
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