Laser-surface carburization process for metal materials and carbon coating device thereof

Abstract

The invention relates to a laser-surface carburization process for metal materials and a carbon coating device thereof. The carburization process comprises the steps of: using a carbon coating deviceto uniformly and quantitatively coat nano carbon powder-alcohol-acetone colloid; drying the metal material coated with the nano carbon powder-alcohol-acetone colloid; using laser beams to melt the dried metal material under the atmosphere protection. The laser-surface carburization process has the beneficial effects that a special powder-laying mode is adopted to prefabricate process carbon, the nanosize carbon powder is selected as an added material, is prepared into nano carbon powder colloid by a specific preparation mode, then the prepared nano carbon powder colloid is coated on the metalsurface by a special carbon-coating device, and the process is optimized from multiple aspects of shape and size of carbon powder, laying mode and content control and the like, so that the powder laying defect is reduced; the whole carburization process is simple and efficient.

Description

technical field [0001] The invention relates to a metal material laser surface carburizing process and a carburizing device thereof. Background technique [0002] Fracture, corrosion and wear are the three main failure modes of metal materials. Effective modification measures can improve material performance, prolong service life and reduce costs. Laser surface alloying uses a high-energy laser beam to melt the surface of the base metal, and at the same time adds a filler material. The filler material is fully mixed with the molten liquid metal, and a strengthening layer is formed on the surface with rapid cooling. During the alloying process, the filling material does not melt or partially melts, and forms a dispersed layer after crystallization to increase hardness and improve wear resistance and corrosion resistance. Common laser surface alloying addition elements for metal materials include C, N, B, Ni, Cr, W, Ti, Co, Mn, Mo and other elements. [0003] For low-carbon ...

AI Technical Summary

Problems solved by technology

The key to laser carburizing by pre-prepared nano-carbon powder method is the carbon paving process, including the type of carbon material (nano-carbon such as graphite, diamond, graphene), nano-carbon powder shape (flaky, spherical), nano-carbon powder size, and spreading method , nano-carbon powder content control method, etc., if the carbon-laying process parameters are not set properly, it is easy to cause nano-carbon powder adhesion, uneven thickness, low efficiency of preset nano-carbon powder, weak bonding between nano-carbon powder and substrate, and the laser head protection Problems such as easy peeling under the action of the atmosphere affect the entire metal alloying process

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