Tungsten Copper

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Tungsten Copper Composite Power Warm Compacting Process 563

Warm compacting process is a kind of new process of high precision powder metallurgy that develops based on conventional molding process. Compared with conventional process, warm compacting process is in the process of pressing the powder in a conventional method and the mold is heated to a certain temperature after pressing to obtain a high-density powder compacts, which flies high density and high performance sintered body. Generally, the pre-heating temperature is between 100-150℃. Due to it is at the range…

Tungsten Copper
Tungsten Copper Composite Power Injection Molding 572

Inspired from powder injection molding of conventional powder metallurgy (PM), tungsten-copper composite powder injection molding technology is based on the injection of tungsten skeleton is formed, and it breaks the limitations of conventional Infiltration produced tungsten-copper composite. Metal injection molding (MIM) is a kind of process that suitable for fabricating the products with complex or irregular shape, and it was first extended by the plastic injection molding industry. In recent years, a substantial increase in the content of the solid…

Tungsten Copper
Tungsten Copper with Gradient Structure 543

Tungsten copper (W-Cu) and molybdenum copper (Mo-Cu) are composed of respectively tungsten and molybdenum with copper, which called two-phase composites and has many advantages when it used in some devices with high power, such as high hardness, high strength, high melting point, excellent chemical stability, excellent thermal and electrical conductivity and lower coefficient of thermal expansion. As a kind of electronic packaging heat sink material takes place of conventional materials gradually, the related researchers make an intensive study on tungsten…

Tungsten Copper
Effect of Copper Content on Tungsten Copper Electrode Properties 533

Except the granularity of tungsten powder, copper (Cu) content also has an influence on the comprehensive properties of tungsten copper electrode. There is product with different copper content by two kinds of infiltration process (Conventional infiltration CV, Microwave infiltration MW) comparison: The table to compare the performance of tungsten copper alloy electrodes by different proportions of the product relative density, electrical conductivity and Brinell hardness (HB) and several parameters under different infiltration process. View from the sheet, we can easily…

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Tungsten Copper Electrode Metallographic Phase and Properties Analysis 566

Tungsten copper powder sintered material morphology distribution of tungsten skeleton evenly distributed on the copper matrix. Due to the nature of tungsten (W) high melting point and high hardness, tungsten at 1000 ℃, its ultimate tensile strength is still 50kgf/mm2, low carbon intensity is even higher than room temperature, which makes tungsten copper material copper melting point below the temperature (about 1000 ℃), still has a very high wear resistance and heat hardness. The tungsten skeleton with copper as matrix…

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Nano Tungsten Copper Electrode Research 636

The granularity and uniformity of tungsten and copper powder has an effect on tungsten copper electrode sintering, and the decreasing granularity will improve the comprehensive properties of materials, such as the density, the hardness, the electric and thermal conductivity. Theoretically, powder metallurgy (PM) uses metal powder (or metallic oxide powder) as raw materials, after compacting and sintering, the granularity of powder is coarser. Compared with PM, nano tungsten copper has higher surface energy, which atoms move by higher interfacial energy,…

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EDM Tungsten Copper Electrode and Positive Polarity 583

Electric discharge machining (EDM) is a non-traditional type of precision processing using an electrical spark-erosion process between the electrode and the working piece of electrically conductive immersed in a dielectric fluid. Since it has more special gains, the EDM has been widely applied in modern metal industry for producing complex cavities in moulds and dies, which are difficult to manufacture by conventional machining. The use of Electrical Discharge Machining in the production of forming tools to produce plastics moldings, die…

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