The double-helix composite earth pressure balance shield machine at this trip, excavation diameter of 6.49 meters, total length of 88 meters, total weight of 550 tons, this double spiral shield machine will be used in Hangzhou Metro Line 5 crossing the Qiantang River Digging tasks.
At present, the commonly used earth pressure balance shield machine cutters are single loading positions. However, when crossing the Qiantang River, complex geological conditions such as hard rock formation, pebble layer, high-viscosity soil layer, floating rock, high water pressure, and river bottom biogas must be faced. A single tool boring is used, which is difficult to excavate, and affects the construction period. , increase the cost and other issues. In this regard, Wuzhong Group adheres to the principle of “user-centered†and jointly develops composite cutter heads and double helix shields with Herrenknecht. It can flexibly switch hobs and cutters for complex geological features, ensuring maximum construction. Duration and driving safety.
The successful development of the double helix shield machine marked a key step for Wu Zhong to develop the composite shield. It will provide another major instrument for China's infrastructure and the “Belt and Road†construction. (This article comes from China Ordnance Industry Group)
A blended powder of tungsten carbide and Metal Alloy Powder can be used for laser cladding, a process used to deposit a layer of material onto a substrate using a laser beam. This blended powder is typically used as a feedstock material for laser cladding applications where high wear resistance and hardness are required.
Tungsten carbide is a hard and wear-resistant material that is commonly used in cutting tools, mining equipment, and other high-wear applications. It has excellent thermal conductivity and high melting point, making it suitable for laser cladding processes.
Metal alloy powders, on the other hand, are often added to the Tungsten Carbide Powder to enhance certain properties or tailor the characteristics of the final cladding layer. These metal alloys can include nickel, cobalt, chromium, or other elements, depending on the specific requirements of the application.
The blended powder is typically prepared by mixing the tungsten carbide and metal alloy powders in the desired ratio. This mixture is then fed into a laser cladding system, where it is melted using a high-power laser beam. The molten powder is rapidly solidified onto the substrate, forming a dense and wear-resistant cladding layer.
The resulting cladding layer can have excellent hardness, wear resistance, and thermal conductivity, making it suitable for various applications such as tooling, wear parts, and surface protection. The specific properties of the cladding layer can be adjusted by varying the composition and ratio of the tungsten carbide and metal alloy powders in the blend.
Overall, the blended powder of tungsten carbide and metal alloy powder offers a versatile and customizable solution for laser cladding applications, providing enhanced wear resistance, hardness, and other desired properties to the final cladding layer.
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