Marine engineering machineery
Industry needs
Due to working in rivers and marine environments for many years, a large number of parts and components in mechanical equipment such as ships on drilling platforms and large ship cranes will be corroded and worn, and need to be protected and repaired. For the preparation of large-area wear-resistant and corrosion-resistant coatings on the surface of shaft parts, high-efficiency surface processing technology is required; while some power equipment may fail due to local wear, such as when iron filings and impurities appear in the lubricating oil system, the oil temperature during the unit startup process or The influence of low oil pressure can easily cause wear of the bearing bush and the shaft diameter, which requires local cladding and repair, which is suitable for the automatic repair method of robots with better flexibility. For the wear and corrosion of marine machinery parts, laser cladding repair and remanufacturing technology can meet the application needs of the above situations at the same time, and has been widely used in various products such as marine diesel engines, marine gas turbines, steam turbines, propellers and hulls. application.
Laser Solutions
• Ultra-high-speed laser cladding
It can be used for efficient preparation of wear-resistant and corrosion-resistant coatings on the surfaces of shaft parts of different sizes, such as offshore platform columns, steam turbine rotors, and drive shafts; Surface cladding of heat-sensitive materials or small-sized parts also offers unique advantages.
• Inner wall laser cladding
It is used for the preparation of wear-resistant hard coatings, erosion-resistant or corrosion-resistant coatings on the inner wall of parts, rapid repair of local defects on the inner surface, and laser cladding repair in narrow and restricted locations.
• Conventional laser cladding repair
For the remanufacturing of damaged parts, or the manufacture of surface functional coatings for new parts. Such as laser cladding repair of corroded and worn cylinder heads, engine blades and other parts.
Laser Application Case
• Ultra-high-speed laser cladding repair of transmission shaft
The failure forms of the transmission shaft are generally manifested as damage, wear and deformation, and these forms will cause the failure of the mechanical equipment and affect the normal operation of the equipment. Ultra-high-speed laser cladding technology can effectively solve these problems, realize directional cladding processing in local areas, improve the hardness and structural strength of the bearing position of the drive shaft, and make the parts more durable. The thickness of the ultra-high-speed laser cladding layer is precisely adjustable from 0.05-1mm, and the cladding efficiency is generally 0.8-1.2m²/h depending on the thickness. The heat input during the cladding process is small, and the formed coating is dense and has high bonding strength. In addition, it can effectively reduce material consumption, reduce the amount of subsequent processing, and have irreplaceable application advantages in terms of cost, efficiency and thermal impact on parts.
• Cylinder head laser cladding repair
The cylinder head is installed on the top of the engine block, sealing the cylinder from the top and forming the combustion chamber. It is often in contact with high temperature and high pressure gas, so it bears a large thermal load and mechanical load. The cylinder head is subject to low-cycle thermal fatigue damage, high-cycle thermal fatigue damage and creep damage during operation, and its life and reliability are important indicators of the engine. The cylinder head is subjected to the action of high temperature, high pressure gas and large impact load during the working process, which will lead to fatigue fracture of the local structure of the cylinder head under the action of thermal stress. In the industry, arc welding repair method is often used for repair. The heat input is too large, which has a serious thermal impact on the workpiece itself, and the weld is easy to crack. Laser cladding technology has high forming accuracy, low thermal influence of the substrate and excellent mechanical properties of the cladding layer. It has been widely used in the profiling and remanufacturing of damaged parts of failed parts. Generally, conventional laser cladding repairs coatings. The thickness is 1-3mm, and the cladding efficiency can reach 0.4-0.6m²/hr
