30/6/2020
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The drawn seamless copper tube is soft and wear-resistant
It has good high temperature corrosion resistance and oxidation resistance. In the middle and late stages, the development level gradually improved, mainly reflected in the gradual addition of the proportion of bronze. Brass differs according to different components. Because the copper formed by mixing red copper and tin is blue, it is called bronze, and there is a period in history that became the bronze age. At the beginning of the Bronze Age, the proportion of bronze utensils was very small, or even stone tools. are all made of copper alloys, but they are not pure copper, but participate in a certain amount of other items to be refined together. Brass rods, bronze rods, aluminum bronzes, etc.
Brass seamless pipes can be used for heat exchangers and condensers, low-temperature pipelines, submarine transport pipes; making sheets, bars, rods, pipes, casting parts, etc. As mentioned above, the bronze rod is made of high-pressure refined bronze composed of red copper and tin. Copper; if it is a variety of alloys composed of more than two elements, it is called special brass; brass for pressure making is called deformed brass. That's when the bronze wares reached a peak.
The copper content is between 62% copper tape for RF cable and 68%, and the plasticity is strong. Good, machinability is acceptable, welding is not easy to fiber weld, and the pressure is excellent in hot state. Aluminum bronze containing iron and manganese has high strength and wear resistance, and can increase hardness after quenching and tempering. It is very resistant to corrosion in the atmosphere, fresh water and sea water. The so-called brass rods are copper and zinc
The alloy brass is composed of materials and has excellent corrosion resistance, wear resistance, excellent elasticity and weldability. Brass composed of copper and zinc is called ordinary yellow.Aluminum bronze and brass Aluminum bronze has high hardness, strong abrasion resistance, and has particularly strong resistance to seawater corrosion. Brass has a strong wear resistance; special brass is also known as special brass, which has high strength, high hardness and strong chemical resistance; and the mechanical function of cutting is also superior to brass materials; The drawn seamless copper tube is soft and wear-resistant
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23/6/2020
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The manufacturing method is to mix nickel powder
copper forms a continuous matrix in the sintered compact, and tungsten serves as a strengthening framework. However, nickel activation and sintering will significantly reduce the electrical and thermal conductivity of the material, and the introduction of impurities in mechanical alloying will also reduce the material's conductivity. Because the moisture of molybdenum copper is worse than that of tungsten copper, especially when preparing low copper content molybdenum copper, the fine density of the material after infiltration is low, resulting in the material's air tightness, electrical conductivity, and thermal conductivity can not meet the requirements.
The high-swelling component is limited by the second component in the surroundings, and the powder is sintered at a lower temperature and humidity. According to reports, the use of very fine powder can improve the sintering function and refinement, so that it reaches more than 99%.
Use is restricted. Injection molding method High-density tungsten alloy is made by injection molding method.52 microns and tungsten powder with a particle size of 515 microns, and then mix in 25% and 30% organic adhesive binder ( Such as white wax or polymethyl vinegar) injection molding, using steam cleaning and irradiation to remove the adhesive, sintering in the middle, to obtain high-density tungsten alloy.
Although the heat resistance function is not as good as tungsten-copper, it is better than some heat-resistant materials, Copper Tape For Heat Exchanger so the use prospect is better. The manufacturing method is to mix nickel powder, copper tungsten powder or iron powder with a uniform particle size of 15 microns with tungsten powder with a particle size of 0.. The material prepared by this method has poor uniformity, there are more closed spaces, and the fine density is generally less than 98%, but after adding a small amount of nickel activation sintering method, mechanical alloying method or oxide for recovery method to prepare ultrafine, nano powder Can improve the sintering activity, and then improve the fine density of tungsten copper, molybdenum copper alloy
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