Study on Macromorphology and Microstructure of Laser Cladding NiCrBSi Alloy Cladding Layer

Abstract

Laser cladding technology is an advanced surface modification technology that can achieve the coating, repair, and manufacturing of surfaces of metals, alloys, ceramics, and other materials. Laser cladding technology has the advantages of high efficiency, high accuracy, and the ability to achieve multi material composites, and is widely used in automotive, aerospace, shipbuilding, medical and other fields. However, there are also some problems with laser cladding technology, such as unstable weld pool morphology, uneven weld pool depth, and thermal stress, which limit its application range and the need to improve efficiency. Therefore, how to further improve the efficiency and quality of laser cladding technology has been an important research direction for researchers. Through nine orthogonal experiments without electromagnetic field, the effects of laser processing parameters, such as laser power, spot diameter, and scanning speed, on the quality of the cladding layer were studied. For melting height, scanning speed is the most significant influencing factor; For the melt width, the spot diameter is the most significant influencing factor; For the penetration depth, the laser power is the most significant factor. Through comprehensive comparison of subsequent morphology observation and mechanical property testing, it is concluded that laser power of 1500W, spot diameter of 3mm, and scanning speed of 4mm/s are the best process parameters, providing guidance for subsequent cladding experiments.