The wheel pair is a key component of the subway. Routes subway conditions are more complex, while frequent starting and braking likely to cause damage. To improve sliding tribological properties wheels, this article focused on laser-cladding technology repair wheel. Ni-based Fe-based alloy coatings were prepared. microstructure was studied by SEM, EDS, XRD, 3D optical morphology. mechanical coa...

In order to extend the service life of 45# steel and reduce production costs, coating NiCrBSi alloy powder on surface can meet requirements, avoid resource waste achieve green manufacturing. Based response method (RSM), dilution rate, aspect ratio contact angle were taken as optimization goals, process parameters (laser power, scanning speed feeding rate) optimized optimal determined. On this b...

Ni-Co duplex coatings were cladded onto Cu to improve the antiwear properties of Cu products. Prior to laser cladding, n-Al₂O₃/Ni layers were introduced as interlayers between laser cladding coatings and Cu substrates to improve the laser absorptivity of these substrates and ensure defect-free laser cladding coatings. The structure and morphology of the coatings were characterized by scanning e...

High entropy alloy attracts great attention for its high thermal stability and corrosion resistance. A CoCrFeNiMn high-entropy coating was deposited on grey cast iron through plasma transfer arc cladding. It formed fine acicular martensite near the iron, with columnar grains perpendicular to interface between substrate cladding layer as well dendrite in middle part of coatings. Simple FCC solid...

The technology of the TiB2/TiB cladding layer addresses issue insufficient wear resistance cup-shaped parts composed titanium alloy materials. In order to eliminate cracking problem laser TiB2/Ti-based alloy, 30%TiB2/Ti-based gradient coating was prepared on surface by in this study. results revealed that microstructure matrix and is metallurgically bonded. microstructures appear as rod-like co...

This study presents a new mechanical tube cladding process named punch plastic deformation pipe cladding (PPDPC) based on local deformation by pressing a punch into the inner layer of the bimetal tube. To investigate the capability of the process, stainless steel tube (as the inner layer) is bonded to a carbon steel pipe (as the outer layer) to fabricate a bimetal pipe. Shear punch tests were u...