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Laser cladding technology has become the first choice for crankshaft repair

Laser cladding technology emerged in the 1980s. It uses a laser beam with high energy density to cladding and fusion a certain special performance material on the basic material to form an alloy cladding layer that is completely different from the matrix composition and performance.

The modern petrochemical industry adopts a continuous large-scale production model, and the supply and demand of upstream and downstream devices are closely connected. The production stability of each device will directly affect the stability of the production line. As machinery and equipment work in harsh environments for a long time, it is easy to cause corrosion and wear of parts. This puts high demands on the reliability, safety, and integrity of the equipment used.

Typical failure-prone parts in the petrochemical industry include impellers, journals of large rotors, disks, bushings, bearings, etc., as well as large rotors, moving blades and stator blades of large generator sets.

Large rotors and shaft parts are repaired by laser cladding technology. The size of the journal can be restored without preheating the workpiece, and the subsequent processing volume is small, not easy to produce metallurgical cracks, the hardness can reach HR60 or more, and the strength of the repaired parts can even reach more than 90% of the original strength. The most important thing is that the repair cost is less than 1/5 of the replacement price. More importantly, it shortens the repair time and solves the problem that must be solved in the continuous operation of major complete sets of equipment in the petrochemical industry. In addition, cladding of super wear-resistant and corrosion-resistant alloy on the surface of key parts can greatly increase the service life without deformation of the surface of the parts; laser cladding on the surface of the mold can not only increase the strength of the mold, but also reduce 2/3 manufacturing costs, shorten the manufacturing cycle by 4/5.

For the repair of the crankshaft, if plasma spraying is used for repair, the bonding strength between the coating and the substrate is not enough. After reinstallation, the safe operation of the equipment may be affected. However, it is difficult to ensure the wear resistance of the repair layer and the matrix without cracks by using surface surfacing welding method. In view of these circumstances, laser cladding technology has become the first choice for repair solutions.