Ni-CrC nano welding layer and preparation method thereof

Abstract

The invention relates to a Ni-CrC nano welding layer and a preparation method thereof. The Ni-CrC nano welding layer comprises the following components in percentage by mass: 19-31% of Ni, 68-80% of CrC, 0.5-1.5% of Al2O3 and 0.5-1.5% of an additive which is WC. The preparation method comprises the following steps: preparing Ni, CrC and Al2O3 into nano-spheres by adopting a gas atomization method, then uniformly mixing the nano-spheres with the ground additive to prepare nano welding wires, and finally welding the nano welding wires on the surface of a part to form the nano welding layer. The nano welding layer provided by the invention is prepared on the surface of the part by adopting a Ni-CrC nano material and a welding manner to realize the repair of the part, and the Ni-CrC nano welding layer is high in bonding strength and good in wear resistance and corrosion resistance, so that the service life of the part is prolonged.

Description

technical field [0001] The invention relates to the technical field of submerged arc welding, in particular to a Ni-CrC nano welding layer and a preparation method thereof. Background technique [0002] During the use of mechanical parts, they are subjected to various friction forces and loads, and after long-term work, the surface will be severely worn, the performance of mechanical transmission will drop sharply, and it will bring safety hazards. Therefore, regular maintenance is required to disassemble the mechanical parts with a large amount of wear and replace them with new ones. However, it is often necessary to stop the whole machine for disassembly and replacement, which delays the normal operation of the equipment. Frequent disassembly affects the The actual production efficiency of the factory also leads to higher costs for equipment use and maintenance. There is an urgent need for a measure to repair the worn parts, so as to prolong the service life of the parts ...

AI Technical Summary

Problems solved by technology

[0002] During the use of mechanical parts, they are subjected to various friction forces and loads, and after long-term work, the surface will be severely worn, the performance of the mechanical transmission will drop sharply, and it will bring safety hazards

Therefore, regular maintenance is required to disassemble the mechanical parts with a large amount of wear and replace them with new ones. However, it is often necessary to stop the whole machine for disassembly and replacement, which delays the normal operation of the equipment. Frequent disassembly affects the The actual production efficiency of the factory also leads to a higher cost of equipment use and maintenance