All metallurgical bonding, no spalling, chipping, cracking
postato da lasernzh il 29/11/2018
Categoria: Eventi - tags: laser

Compared to other cladding techniques (such as spray tungsten carbide, tungsten carbide spray plasma spray or arc welding), laser cladding is a unique process with fundamental differences in its application. The use of usb laser pointer cladding, a highly focused heat source, has a large impact on the finished product. Laser cladding has many advantages due to its low heat input, high cure rate and accurate process control.

All metallurgical bonding, no spalling, chipping, cracking: Laser cladding has a complete metallurgical bond with the substrate, which means it does not peel or crack like a plasma or thermal spray coating. Little or no voids or porosity: Unlike plasma or thermal spray, laser cladding coating is suitable for fully dense coatings. The low heat input process greatly reduces thermal distortion: laser cladding inputs less than 20% of the heat compared to arcs that cover the same part. The thermal deformation reduction of this component is significant. In many cases, in order to solve the thermal deformation problem, fewer subsequent operations, such as machining and straightening, are required. Thin-walled parts that cannot be covered with an arc can be coated with a 488nm laser pointer due to low heat and deformation.

green laser pointer

Small heat affected zone: Due to the reduced heat input, the heat affected zone is greatly reduced, increasing the strength of the component. Very low dilution: Low heat input also reduces the dilution of the cladding. Reducing the mixing of the base metal and the coating means a purer coating with better metallurgical properties and higher corrosion and wear resistance.

Release Cladding: Due to the lower dilution rate, a thinner coating (compared to arc welding) can impart the same wear or corrosion properties. This can significantly reduce the cost of cladding materials. High solidification speed: Since the solidification speed is fast and the heat input is low, materials such as carbides can be added to greatly improve the wear resistance of the coating. Conventional arc welding processes melt carbide particles. The ability to traditionally "non-weldable" materials: low heat input and fast curing can be coated with materials such as carbon steel or nickel-based superalloys. These materials are difficult or impossible to weld using conventional welding techniques.

Excellent process control, better layer thickness control and surface treatment: waterproof laser pointer cladding provides better control of layer thickness, coating of thinner coatings and better surface finish. The ability to apply a closer net shape coating reduces the amount of finishing required and reduces the amount of excess coating material applied. Infinite Cladding Thickness: Multiple coatings can be applied to achieve any thickness. High repeatability and process stability: Automated control of the process provides excellent parameter control for good process stability and reliable, repeatable results.

High deposition rate: High deposition rates can be achieved, especially with hot wire technology, which can reduce application time. Greatly extend the life of parts: Compared to plasma or thermal spraying and arc welding, laser cladding has excellent corrosion resistance and wear resistance, which greatly extends the life of parts. One of the many advantages of the laser cladding process is that it is compatible with a wide range of material choices, either in wire or powder form; the options for material properties are almost endless.

Material selection: Powder offers virtually unlimited potential for changing alloy composition, allowing the use of carbides and other forms of wire that are not available. Material Capture: Unlike powders, when material is coated with wire filler material, no wasted material. Lower material costs: The cost of wire filler material is much lower than the same material in powder form. Unaffected by gravity: the wire is not affected by gravity and is not affected by the powder, so unsuitable coating can be achieved. 2-5 times higher deposition rate using hot wire: preheating the wire before it enters the bath reduces the laser energy required to melt the fill material, thereby achieving higher deposition using the same military laser pointer power rate.