Laser Quenching equipment
Perform phase transformation hardening treatment on the metal surface to improve the hardness, wear ...
Perform phase transformation hardening treatment on the metal surface to improve the hardness, wear ...
Used for surface strengthening, repair, and remanufacturing of components, the coating has high adhe...
Flexible processing of complex curved sheet metal parts, with high cutting accuracy, fast speed, and...
Specially designed for seamless welding of precision plastic components, with a small heat affected ...
The performance of the valve sealing surface directly determines the leakage level and service life of the valve. Traditional plasma spray welding or surfacing techniques have high heat input and dilution rate, which can easily lead to dilution of the sealing surface alloy composition, performance degradation, and severe deformation. Laser cladding, with its characteristics of energy concentration and small heat affected zone, has become an ideal process for strengthening the sealing surface of high-end valves.
Taking the sealing surfaces of gate valves and globe valves as an example, a 5kW CO ₂ laser is used to melt cobalt based Stellite 6 alloy onto the substrate of the valve body or disc (such as WCB carbon steel or CF8M stainless steel). By precise focal length control and spot shaping, a cladding layer with uniform width and controllable thickness ranging from 1-3.5mm can be obtained. The dilution rate of the cladding layer can be controlled within 5%, effectively preserving the high hardness and corrosion resistance of Stellite alloy.
The cladding layer formed by this process has no cracks or pores, and the hardness is stable at HRC 40-45. Compared to plasma spray welding, laser cladding valve sealing surfaces have better high-temperature wear resistance and erosion resistance, and their service life can be extended by 50% -100%. They are widely used in fields such as petroleum, chemical, and power plants that require extremely high reliability of valves.
