EHLA

Technology and procedure

Extreme high-speed laser material deposition of rotationally symmetric components.

          Extreme high-speed laser cladding technology is used to improve the wear resistance, corrosion resistance, high-temperature resistance, and oxidation resistance of the surface of parts, thus achieving the goal of surface modification or repair and meeting the requirements for specific properties of the material surface.

         In the conventional laser cladding process, laser energy is used to melt the base material to form a molten pool into which the powder is injected and then melted and solidified to form a protective coating.

        Extreme high-speed laser cladding technology essentially changes the melting position of the powder so that the powder intersects the laser right above the workpiece and is then uniformly coated on the workpiece surface. With melting rates of up to 20-200 m/min, the technology can be used for surface coating of heat-sensitive materials, thin-walled and small components due to the low heat input. In addition, it can be used for the preparation of coatings on entirely new material combinations such as aluminum-based, titanium-based, or cast iron materials. As the surface quality of the layer is significantly higher than that of conventional laser cladding, it can be applied with a simple grinding or polishing process, thus reducing material waste and the amount of subsequent processing, which makes ultrafast laser cladding an irreplaceable application in terms of cost, efficiency and thermal impact on the part.  

                                    超高速激光熔覆技术原理                                                                                         常规激光熔覆技术原理               

                               超高速激光熔覆涂层截面金相                                                                                   常规激光熔覆涂层截面金相

                                  超高速激光熔覆涂层表面                                                                                           常规激光熔覆涂层表面 

Technical advantages

Cost-effective

• Melt line speed 20-200m/min

• Cladding efficiency 0.8-1. 2m2/hr on

   Coating thickness

• Powder utilization ratio up to 95%or more

• Follow-up without turning, can be directly grinding

   Or polishing

High quality high adaptability

• Rigid stainless steel corrosion resistant coating hardness

   HRC50 or more, no pitting

• Super-hard wear-resistant coating hardness up to HRC65 above,

   Suitable for all kinds of surface friction and impact wear

• Apply a coating thickness of 0. 05-1mm

• High surface quality, the fuse cover after the surface roughness can be

   Up to Ra25μm

• For iron-based, Nickel-based, cobalt-based, copper-based,

   Amorphous, composite materials, etc. a variety of material systems

Low heat input

• Low laser power requirements

• The Matrix is small, parts small deformation

• Large ratio of length to diameter, thin-walled, heat-sensitive material of the parts

   The surface of the cladding is the best solution

Efficient ultra-high speed laser cladding process
Three kinds of surface coating preparation technique comparison

Technology background

          Ultra high-speed laser cladding, also known as EHLA (Extreme High Speed Laser Cladding,and by the German Fraunhofer ILT invention, known as the current alternative plating technology is the most competitive of the process, because it is the industry to bring innovative technology advances, 2017, to obtain Francisco-Ron Hough Association Innovation Award(Joseph von Fraunhofer), Germany laser innovation award(Berthold Leibinger Innovationspreis), the German Steel Association Innovation Award for the Steel Innovation Prize program and other awards.

          ACunity as the Fraunhofer ILT Hatch enterprise, will be the first ultra-high speed laser cladding technology to China market, with Fraunhofer ILT closely to the ultra-high speed laser cladding technology industrial upgrading, and constantly improve the technological level, to enhance its core component functionality, such as powder feeding nozzle durability, the powder feeding accuracy, the higher the amount of feed powder, the powder utilization. In the Fraunhofer ILT original high-precision coaxial powder feeding nozzle on the basis of a modification of the official launch of efficient, high convergence of powder nozzle, powder feed efficiency can be up to 5kg/hr or more, the powder utilization ratio up to 95%. And its special modular design, greatly reduces the use cost, so that the loss of parts of replacement becomes extremely simple, while ensuring process repeatability, the nozzle size is also available according to the maintenance position for flexible adjustment. Newly developed ultra-high speed laser cladding processing head, by special optical path adjusting system design, to achieve light-powder in space the ideal interaction, so that the powder melts more stable, energy use more efficient.

ACunity ultra-high speed laser cladding head

ACunity ultra-high speed laser cladding process

         In 2017, ACunity sale in China first set of EHLA equipment, in 2019 to help customers to establish the first EHLA factory. Currently ACunity the device has been installed applications in powder metallurgy, mining machinery, scientific research institutes and other industries, and the first in the coal industry to achieve high-volume production. German scientific research and engineering team to provide customers from materials, process, test, equipment, processing to large-scale production line the whole production chain professional service and unwavering support.

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