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 ...
Whether the mechanical properties, especially tensile properties, of the base material 27SiMn steel for hydraulic support columns will deteriorate due to thermal effects after laser cladding repair is a matter of great concern in engineering applications. This study revealed the influence of laser cladding parameters on the tensile properties of matrix materials through systematic experiments.
An orthogonal experiment with three factors and three levels was designed, with variables including laser power (2000-3000W), scanning speed (12-20mm/s), and powder coating thickness (1.5-2.5mm). It was found through tensile testing of the melted sample that the tensile strength of the sample was not lower than that of the base material under all parameters. The key lies in the softening behavior of the heat affected zone: excessive energy input (high power, low speed) can cause coarse grains in the heat affected zone, resulting in slight softening and a slight decrease in yield strength.
The final determined optimal process window is: laser power of 2500W, scanning speed of 16mm/s, and powder coating thickness of 2.5mm. Under these parameters, the quality of the cladding layer is excellent, and the heat affected zone of the substrate is the narrowest, with the least softening phenomenon. Its yield strength and tensile strength can reach more than 95% of the base material, and the elongation at break also meets the requirements. This study provides a scientific basis for setting industrial parameters for laser cladding repair of hydraulic supports.
