Preparation method of high-strength and corrosion-resistant composite heat exchanger tube

Abstract

The invention discloses a preparation method of a high-strength and corrosion-resistant composite heat exchanger tube. The composite heat exchanger tube consists of a copper base, alloy metal and filling particles, wherein the alloy metal comprises the following components in percentage 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 mixed rare earth; the mixed rare earth consists of yttrium, berkelium and lanthanum at a mass ratio of 1: (0.15-0.2): (0.4-0.5); and the filling particles comprise the following components in percentage by weight: 0.010-0.012% of tetrapod-like zinc oxide whiskers, 0.008-0.009% of silicon carbide, 0.005-0.006% of aramid fiber, 0.004-0.005% of glass fiber and 0.002-0.003% of nano titanium oxide. The oxygen content of the prepared composite heat exchanger tube is in an oxygen-free copper level; the crystal grain is tiny; and the mechanical strength, the high-temperature resistance, the corrosion resistance and the wear resistance are improved greatly compared with the existing copper tube.

Description

technical field

[0001] The invention relates to the field of heat exchange equipment, in particular to a method for preparing a high-strength corrosion-resistant composite heat exchange tube. 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 maintenanc...

Examples

Embodiment 1

[0021] A method for preparing a high-strength corrosion-resistant composite heat exchange tube. The composite heat exchange tube is composed of copper base, alloy metal and filler particles; the weight percentage of alloy metal is as follows: magnesium 0.5-0.6%, silver 0.08-0.09%, tin 0.2% -0.4%, zirconium 0.012-0.014%, niobium 0.012-0.014%, nickel 0.05-0.06%, titanium 0.005-0.008%, mixed rare earth 0.02-0.04%, mixed rare earth is composed of yttrium, berkelium and lanthanum, the mass ratio of the three It is 1: (0.15-0.2): (0.4-0.5); the weight percentage of filler particles is as follows: tetrapod zinc oxide whisker 0.010-0.012%; silicon carbide 0.008-0.009%, aramid fiber 0.005-0.006%, glass 0.004-0.005% of fiber and 0.002-0.003% of nano-titanium dioxide; the balance is copper, and the preferred content of copper is ≥99.95% cathode copper; the preparation steps are as follows:

[0022] (1) Divide the copper material, various alloy metals and filler particles into multiple pa...

Embodiment 2

[0026] A method for preparing a high-strength corrosion-resistant composite heat exchange tube. The composite heat exchange tube is composed of copper base, alloy metal and filler particles; the weight percentage of alloy metal is as follows: magnesium 0.5-0.6%, silver 0.08-0.09%, tin 0.2% -0.4%, zirconium 0.012-0.014%, niobium 0.012-0.014%, nickel 0.05-0.06%, titanium 0.005-0.008%, mixed rare earth 0.02-0.04%, mixed rare earth is composed of yttrium, berkelium and lanthanum, the mass ratio of the three It is 1: (0.15-0.2): (0.4-0.5); the weight percentage of filler particles is as follows: tetrapod zinc oxide whisker 0.010-0.012%; silicon carbide 0.008-0.009%, aramid fiber 0.005-0.006%, glass Fiber 0.004-0.005% and nano-titanium dioxide 0.002-0.003%; the balance is copper, the cathode copper with copper content ≥ 99.95% is preferred; the length of four-needle zinc oxide whiskers is 12-14 μm, the root diameter is 3-5 μm, and the length of aramid fiber 2-2.5mm, monofilament dia...

Embodiment 3

[0032] A method for preparing a high-strength corrosion-resistant composite heat exchange tube. The composite heat exchange tube is composed of copper base, alloy metal and filler particles; the weight percentage of alloy metal is as follows: magnesium 0.5-0.6%, silver 0.08-0.09%, tin 0.2% -0.4%, zirconium 0.012-0.014%, niobium 0.012-0.014%, nickel 0.05-0.06%, titanium 0.005-0.008%, mixed rare earth 0.02-0.04%, mixed rare earth is composed of yttrium, berkelium and lanthanum, the mass ratio of the three It is 1: (0.15-0.2): (0.4-0.5); the weight percentage of filler particles is as follows: tetrapod zinc oxide whisker 0.010-0.012%; silicon carbide 0.008-0.009%, aramid fiber 0.005-0.006%, glass Fiber 0.004-0.005% and nano-titanium dioxide 0.002-0.003%; the balance is copper, the cathode copper with copper content ≥ 99.95% is preferred; the length of four-needle zinc oxide whiskers is 12-14 μm, the root diameter is 3-5 μm, and the length of aramid fiber 2-2.5mm, monofilament dia...

technical field

[0001] The invention relates to the field of heat exchange equipment, in particular to a method for preparing a high-strength corrosion-resistant composite heat exchange tube. 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 maintenanc...

Examples

Embodiment 1

[0021] A method for preparing a high-strength corrosion-resistant composite heat exchange tube. The composite heat exchange tube is composed of copper base, alloy metal and filler particles; the weight percentage of alloy metal is as follows: magnesium 0.5-0.6%, silver 0.08-0.09%, tin 0.2% -0.4%, zirconium 0.012-0.014%, niobium 0.012-0.014%, nickel 0.05-0.06%, titanium 0.005-0.008%, mixed rare earth 0.02-0.04%, mixed rare earth is composed of yttrium, berkelium and lanthanum, the mass ratio of the three It is 1: (0.15-0.2): (0.4-0.5); the weight percentage of filler particles is as follows: tetrapod zinc oxide whisker 0.010-0.012%; silicon carbide 0.008-0.009%, aramid fiber 0.005-0.006%, glass 0.004-0.005% of fiber and 0.002-0.003% of nano-titanium dioxide; the balance is copper, and the preferred content of copper is ≥99.95% cathode copper; the preparation steps are as follows:

[0022] (1) Divide the copper material, various alloy metals and filler particles into multiple pa...

Embodiment 2

[0026] A method for preparing a high-strength corrosion-resistant composite heat exchange tube. The composite heat exchange tube is composed of copper base, alloy metal and filler particles; the weight percentage of alloy metal is as follows: magnesium 0.5-0.6%, silver 0.08-0.09%, tin 0.2% -0.4%, zirconium 0.012-0.014%, niobium 0.012-0.014%, nickel 0.05-0.06%, titanium 0.005-0.008%, mixed rare earth 0.02-0.04%, mixed rare earth is composed of yttrium, berkelium and lanthanum, the mass ratio of the three It is 1: (0.15-0.2): (0.4-0.5); the weight percentage of filler particles is as follows: tetrapod zinc oxide whisker 0.010-0.012%; silicon carbide 0.008-0.009%, aramid fiber 0.005-0.006%, glass Fiber 0.004-0.005% and nano-titanium dioxide 0.002-0.003%; the balance is copper, the cathode copper with copper content ≥ 99.95% is preferred; the length of four-needle zinc oxide whiskers is 12-14 μm, the root diameter is 3-5 μm, and the length of aramid fiber 2-2.5mm, monofilament dia...

Embodiment 3

[0032] A method for preparing a high-strength corrosion-resistant composite heat exchange tube. The composite heat exchange tube is composed of copper base, alloy metal and filler particles; the weight percentage of alloy metal is as follows: magnesium 0.5-0.6%, silver 0.08-0.09%, tin 0.2% -0.4%, zirconium 0.012-0.014%, niobium 0.012-0.014%, nickel 0.05-0.06%, titanium 0.005-0.008%, mixed rare earth 0.02-0.04%, mixed rare earth is composed of yttrium, berkelium and lanthanum, the mass ratio of the three It is 1: (0.15-0.2): (0.4-0.5); the weight percentage of filler particles is as follows: tetrapod zinc oxide whisker 0.010-0.012%; silicon carbide 0.008-0.009%, aramid fiber 0.005-0.006%, glass Fiber 0.004-0.005% and nano-titanium dioxide 0.002-0.003%; the balance is copper, the cathode copper with copper content ≥ 99.95% is preferred; the length of four-needle zinc oxide whiskers is 12-14 μm, the root diameter is 3-5 μm, and the length of aramid fiber 2-2.5mm, monofilament dia...