Laser surface remanufacturing (cladding repair, additive manufacturing) uses high-energy laser as heat source, alloy powder as cladding material, and laser irradiation alloy powder synchronously acts on the workpiece surface to rapidly melt to form a molten pool, and then rapidly solidifies to form a dense, uniform and controllable thickness metallurgical binding layer. The cladding layer has special physical, chemical and mechanical properties that can be modulated, Thus, the surface size of the workpiece can be repaired and the service life can be prolonged.
One
Advantages of Technology
1) High performance cladding layer can be selectively prepared on the cheap and easy to process substrate surface, and the composition and performance of the cladding layer are rarely diluted by the composition of the substrate material.
2) The cooling rate is as high as 10 ^ 6 ℃ / s, and the microstructure of the cladding layer is finer, denser, harder, better wear resistance and corrosion resistance.
3) The laser processing is flexible and convenient for processing the parts (groove, inner hole wall, etc.) that are difficult to be processed by conventional methods. The motion accuracy is controllable, and it is convenient for processing the contour surface with complex shape. It can realize precise cladding repair in selected area, with less subsequent processing.
4) Small heat affected zone, small deformation, dilution ratio ≤ 5%.
5) The thickness and shape of the cladding layer can be precisely controlled according to the requirements of working conditions, and combined with the base metal metallurgy.
6) The process is controllable, easy to realize automation, no pollution to the environment, low noise and comfortable working conditions.
7) It provides a new way for remanufacturing waste parts to extend their service life.
Two
Application background
At present, due to the failure of key parts of the machine, the equipment failure losses are large, with the value of more than trillion yuan. More than 80% of the failures are caused by local wear and corrosion on the surface of the parts. Compared with the manufacturing of new products, laser surface strengthening and Remanufacturing can save 60%, 70% of the materials, 50% of the cost, almost no solid waste, and the emission of air pollutants can be reduced by more than 80%. Laser remanufacturing is conducive to the formation of "resources products waste products Remanufactured Products" circular economy mode, green manufacturing.
Three
Application industry
The application of laser cladding repair involves metallurgy, electric power, petroleum, chemical industry, ship, locomotive, coal machine, automobile and other pillar industries of national economy. According to the working conditions of different equipment, laser surface remanufacturing (cladding repair, additive manufacturing) mainly improves the wear resistance, corrosion resistance, high temperature resistance, oxidation resistance and other properties of metal parts. It can not only restore the failed parts to use, but also significantly extend the service life of new parts.
Metallurgical Industry
Mill housing on line laser cladding
Material: Cast Steel
Working condition: long term high pressure sliding wear and corrosion, resulting in fatigue failure of contact surface with sliding plate and size out of tolerance.
After processing: the contact surface of sliding plate is laser deposited with high wear-resistant cobalt base alloy, with hardness of 28-40hrc.
Use effect: restore size, wear resistance, good steel used on the blade, greatly improve the service life, 8-10 years.
Coal machinery industry
Hydraulic column high speed laser cladding
Material: 27SiMn / 42CrMo
Efficiency: 0.6-1.2 ㎡ / hour
Power: 6-10kw
Hardness before processing: 217hbs (HRC over the lower limit)
Hardness after processing: 45-50, 53-58hrc (material optional)
Application effect: cladding thickness 0.2-1mm, surface roughness Ra 6.5-7.5um.
Transportation industry
Propeller mandrel laser cladding repair
Material: stainless steel
Hardness before machining: hrc30
Hardness after machining: HRC35-40
Restoration effect: restoration size, homogeneous and heterogeneous restoration.
Petrochemical Industry
Repair of cylinder sleeve inner hole by laser cladding
Material: 42CrMo
Hardness before machining: hrc30
Hardness after machining: hrc35-45
Remanufacturing effect: recovery size, homogeneous and heterogeneous repair.
Machinery industry
Laser cladding of inner ring seat
Material: 40Cr
Hardness before machining: hrc30
Hardness after machining: hrc35-45
Remanufacturing effect: improve the surface wear resistance and corrosion resistance.
Compared with the traditional submerged arc welding, arc welding and other repair methods, laser cladding has the advantages of high stability, small thermal deformation, good quality, diversified process and low processing cost. After laser cladding and remanufacturing, the product quality is stable and reliable, the service life is effectively extended, and good economic and social effects are achieved.
Quality builds brand, professional achievement is efficient! We have professional team, rich experience, warm service and good reputation. Whether you need laser cladding equipment or laser cladding processing business, you can contact us for more information. Wuhan Iron and Steel Co., Ltd. Huagong laser builds reputation with quality and service, shares win-win results, and brings technology closer to life and higher honor.
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Wuhan WISCO Huagong laser large equipment Co., Ltd
Authoritative manufacturer of high power laser large equipment
Provide laser surface treatment and remanufacturing application solutions
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