Technical Topics-第18页-Changsha Langfeng Metallic Material Co., Ltd.

Powder Coating
Powder Coating Powder coating is the use of dusting equipment (electrostatic spray machine) to spray the carbide powder coating to the surface of the workpiece,under static electricity,the powder will be uniformly adsorbed on the surface of the workpiece to form a powder coating;powder coating after high temperature baking.The effect of powder coating on the mechanical strength, adhesion,corrosion resistance,anti-aging and so on is superior to the painting process,the cost is also in the process of spraying the powder coating effect,the effect of different effects (powder coating different kinds of effects) With the effect of painting under.
Molybdenum carbide powder Introduction
Mo2C = 203.9, melting point: 2687 degrees, density 9.18 g / cm3, dark gray. Theoretical density 9.2g / cm3. The temperature of 2690 ° C. Mohs hardness of 7. And a microhardness of 1800 kg / mm3 (load: 50 g). The elastic modulus is 22100 kg / mm2. Thermal conductivity of 6.7 × 106W / (m · K). 2300 ℃ or more decomposition. (Molybdenum (MoC) as the main phase of the ceramic. Theoretical density 8.88g / cm3. Melting point 2700 ° C. Usually first made of molybdenum carbide powder (using molybdenum and carbon directly into the law, metal oxides and carbon reduction (Sintering, sintering and heat sintering, etc.) in a carbon tube furnace, a molybdenum wire furnace or a high-frequency vacuum furnace under vacuum or reducing atmosphere, Static pressure sintering) and is mainly used for super-hard tool materials, wear-resistant materials, heating materials and high-temperature structural materials.
Arc spraying equipment features
Arc spraying equipment features Arc spraying equipment with spray coating quality, high density, strong binding, spraying efficiency, energy efficient, easy and safe operation, spraying zinc, aluminum, stainless steel, copper and other metal wire, used in a variety of anti-corrosion Engineering and mechanical maintenance. The device has the following salient features: 1, spray high efficiency: This type of arc spraying equipment can spray zinc per hour 25-35kg, 2-4 times the traditional wire flame spraying efficiency. 2, good coating quality: This series of arc spraying equipment, using the world-recognized advanced technology – double atomization, closed nozzle, spray atomized particles high temperature, flying speed, dense coating, uniform, coating The physical properties (such as density, bonding strength) are superior to the traditional wire flame spray coating. 3, easy to operate, safe: The series of arc spraying equipment, small size, flexible mobile; gun weight of only 1 kg, greatly reducing the labor intensity, the operation is very convenient; the device output no-load voltage below 40V, very safe. 4, the workpiece is not deformed when spraying: due to high-pressure air as the driving force, so that the workpiece is sprayed in the heat is very slight, to ensure that the workpiece is not deformed during spraying....
Advantages of adding TiC inserts
TiC rods can effectively improve the carbon content,improve wear resistance,adding a certain amount of chromium (generally 2-2.5%),can reduce the stability of austenite, you can get a high-quality wear-resistant materials, the processing hardening speed, can quickly form a high hardness of the hardening layer, Impact abrasive wear capacity greatly improved.
Arc spraying the principle and characteristics of the mold
Arc spraying the principle and characteristics of the mold
Metal powder flame spraying (welding) spray welding process
(4) oxygen – acetylene flame alloy powder welding process to adapt to a variety of carbon steel, low alloy steel parts of the surface to strengthen or repair, but should pay attention to some of the characteristics of parts, when the matrix material linear expansion coefficient and alloy spray layer If the coefficient of linear expansion is larger than 12 × 10-6 / ℃ greater than 12 × 10-6 / ℃, you should be careful with this process, so as to avoid cracking, if the matrix metal and oxygen affinity greater elements such as Tungsten and molybdenum content of more than 3%, aluminum, magnesium, cobalt, titanium, molybdenum and other elements of the total content of more than 0.5% or steel in the sulfur content is more difficult to spray welding, because these materials and oxygen The role of easy to produce a dense and stable oxide film, blocking the wetting of the matrix alloy wetting effect, remelting liquid alloy will be beads like "sweat" to roll off, so the use of spray welding process, it should be noted The suitability of this process for the substrate material to be sprayed.

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