Laser cladding (also known as laser cladding or laser cladding) is a new surface modification technique that adds a cladding material to the surface of a substrate and utilizes a high-energy-density laser beam to make it thinner with the surface of the substrate. The layers are fused together to form a metallurgically bonded filler cladding on the surface of the substrate. Since laser cladding can melt the high-melting material on the surface of the low-melting substrate, the composition of the material is not limited by the usual thermodynamic conditions for alloy metallurgy. Therefore, the range of cladding materials used is quite extensive, including nickel-based, cobalt-based, iron-based alloys, carbide composite alloy materials, and ceramic materials. Among them, the laser cladding of the alloy material and the carbide composite material is relatively mature, and has already obtained the practical application. Due to the near adiabatic rapid heating process due to the high energy density of the laser beam, the thermal effect of the laser cladding on the substrate is less and the resulting deformation is smaller. Controlling the input energy of the laser can also limit the dilution of the substrate to a very low degree (less than 10%), thus maintaining the excellent performance of the original cladding material.
Therefore, laser cladding technology can improve the wear resistance and corrosion resistance of the material surface, and is mainly used for the repair of parts after wear and enhance the performance of newly manufactured parts. For important parts (such as cylinder liners and pistons in agricultural machinery), due to heavy workload, high temperature, high pressure, erosion, and varying degrees of friction, the amount of wear is large, and parts need to be scrapped and replaced on a regular basis. For cultivating machinery, soil preparation machinery, and harvesting machinery (such as ploughs, cultivators, seeders, and harvesters), the local wear is very fast during operation and the parts are scrapped because of localized damage. In order to improve the service life of parts, repair work has great significance. Laser processing has the unique advantage of selecting the area, and laser cladding can easily repair the worn parts, make the parts not be scrapped due to local damage, improve the reliability and service life of the parts, and re-achieving better in the case of minimum input costs. The performance requirements "J. In addition, the use of laser repair of the mold can greatly increase the life of the mold, without the restrictions of shape and size, should also be vigorously promoted and adopted in agricultural machinery manufacturing.
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The gelatin hollow capsule is a shell with special color and shape, made of the main raw material of gelatin. It is always used as special packaging of medicines or health care products which have bad smell, light sensitive of unstable,.
The capsules do not need adhesives and numerous excipients during the production process, easy to disintegrate and release in gastric juice.
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