Laser surface compound reinforced restoring method and shaft part restored with same

Abstract

The invention provides a laser surface compound reinforced restoring method and a shaft part restored with the same. A shaft part material is made to have high corrosion resistance, surface hardness and corrosion resistance of the material are improved obviously, the surface size of the abraded shaft part can be restored, and high hardness of the part surface is ensured without cracking. The method includes the steps that an impurity layer on the surface of the shaft part is cleared to obtain the cleaned shaft part; the cleaned shaft part is heated in advance to obtain the shaft part at the preheating temperature; laser cladding machining is conducted, the surface of the shaft part at the preheating temperature is clad with Fe-based alloy powder to obtain the clad shaft part; nano ceramic powder is adopted to conduct laser alloy machining on the clad surface of the shaft part to obtain the restored shaft part.

Description

technical field [0001] The invention relates to the technical field of laser processing, in particular to a laser surface composite strengthened repair shaft part and a preparation method thereof. Background technique [0002] With the continuous development of industry, the use of shaft parts in industry is becoming more and more important. Due to the complexity of the working environment of shaft parts, there are many types of failure forms. Among them, the surface failure mainly caused by wear can be repaired. The repair method can use high-power laser cladding technology to repair the failed parts on the surface of the shaft parts, so that the parts can return to their original size and perform like new products. However, the cracking problem of high hardness powder in laser cladding technology has always been a problem that is difficult to solve. The high-hardness powder used for laser cladding contains more B, Si, and C. These three elements can form hard phases, th...

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Problems solved by technology

However, the cracking problem of high hardness powder in laser cladding technology has always been a problem that is difficult to solve

[0003] In addition to the laser cladding technology mentioned above, laser alloying can also achieve the purpose of strengthening the surface properties of the material. The alloy powder layer is sprayed on the surface of the substrate. Through the interaction between the laser beam and the surface of the material, physical and chemical changes occur on the surface of the material. Changes can significantly improve the surface hardness and wear resistance of materials. Compared with cladding, its disadvantage is that it cannot restore the surface size of worn parts.

[0004] It can be seen that the composite strengthening method of laser cladding and laser alloying can not only achieve the purpose of restoring the surface size of the worn part, but also ensure the high hardness of the surface of the part without cracking, but there is no such method in the prior art. Combining two methods for strengthening and repairing shaft parts

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