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 ...
In internal combustion engines or compressors, fusion strengthening is often performed on the ring groove or top of the piston to enhance wear resistance and heat resistance. However, the significant difference in physical properties between aluminum alloy pistons and high melting point wear-resistant alloys (such as nickel based and iron-based) can lead to poor bonding and cracking of the cladding layer. Resolving interface adhesion is the technical key.
This study aims to overcome this challenge through material design and process innovation. In terms of materials, aluminum silicon alloy powder is used as the transition layer due to its good compatibility with the piston matrix; Or add active elements (such as Si, Ti) that can form a good metallurgical bond with aluminum to wear-resistant powders. In terms of technology, the "shallow melting depth" process with high power and high scanning speed is adopted to precisely control the melting amount of the aluminum substrate, ensuring metallurgical bonding and preventing excessive aluminum elements from diluting the cladding layer and reducing its performance.
Through tensile testing, it was determined that the interface bonding strength between the optimized cladding layer and the aluminum alloy substrate can remain stable at over 300MPa, which is much higher than traditional techniques such as plasma spraying. This makes it possible to achieve high-performance cladding strengthening on aluminum alloy pistons, opening up new avenues for improving the performance of high-power density engines.
