Repairing method of metal workpiece

Abstract

The invention discloses a repairing method of a metal workpiece. The repairing method includes the steps of cleaning the surface of the metal workpiece, derusting the surface through sandblast so that the roughness degree of the metal surface can reach 6.3, cleaning and drying the surface, comprehensively cleaning up the sandblast workpiece through special cleaning agent so that the cleanliness degree can reach Sa2.5, drying the workpiece, humidifying and bottoming the workpiece, bottoming the cleaned surface through a ceramic fiber coating, repairing defected parts through chromium-molybdenum-contained small-grained wear-resistant healant, conducting drying and solidifying through an iodine-tungsten filament lamp, a warm air machine and other heating devices, conducting heating for 5 hours to 7 hours, coping the surface, cleaning and drying the surface, smearing the surface with finishing coat, and smearing the cleaned and dried workpiece with finishing coat one time to three times through corrosion remover or high-temperature ceramic protective agent. The method is wide in operation and application range, low in working condition requirement, low in cost and good in repairing effect.

Description

technical field [0001] The invention relates to the field of maintenance of mechanical workpieces, in particular to a method for repairing metal workpieces. Background technique [0002] During long-term use, metal workpieces are often damaged to varying degrees due to wear or corrosion, and need to be repaired or renewed after reaching a certain level. At present, the common maintenance methods are mainly replacement, welding or processing. [0003] Common replacement methods include overall replacement or replacement of partial parts. However, due to the strong integrity of metal tools, the cost of replacing parts or workpieces as a whole is often high, and the newly replaced parts are prone to discrepancies with the original parts. adapt to the situation. Although thermal processing methods such as welding can effectively restore damage such as holes on metal workpieces, due to the limitations of the repair process and the constraints of welding materials, thermal proce...

AI Technical Summary

Problems solved by technology

[0003] Common replacement methods include overall replacement or replacement of partial parts. However, due to the strong integrity of metal tools, the cost of replacing parts or workpieces as a whole is often high, and the newly replaced parts are prone to discrepancies with the original parts. adapt to the situation

Although thermal processing methods such as welding can effectively restore damage such as holes on metal workpieces, due to the limitations of the repair process and the constraints of welding materials, thermal processing methods such as welding are difficult to use on many metal workpieces with special structures and shapes, or The repair progress cannot be guaranteed, and the service life and performance after repair are often quite different; during the hot welding repair process, immediate deformation and internal stress will occur on the operating surface, and quality control is difficult; in addition, thermal processing methods such as welding are often unable to Used on metal workpieces with large damage volume

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