Alloy coating for crystallizer surface laser cladding and preparation method thereof

Abstract

The invention relates to the field of laser cladding, in particular to an alloy coating for crystallizer surface laser cladding and a preparation method thereof. The componenst of the alloy coating are prepared according to the mechanical property and effectiveness condition of the crystallizer and the characteristics of crystallizer surface laser cladding. The alloy coating is prepared from nickel-based self-melt alloy powder comprising the following elements in percentage by mass: Ni 55-57, Cr 16-19, W 8-10, Mo 8-10, Al 0.8-1.0, Ti 2.5-3.5, C 0.2-0.3, Si 2.5-3.5 and B 2-2.5. After being cladby laser, the crystallizer surface has a high-quality coating, thereby meeting the requirements of a crystallizer on a basic performance of quick heat conduction on one hand and increasing the wear resistance and hot erosion resistance of the crystallizer surface.

Description

technical field [0001] The invention relates to laser cladding technology, in particular to a laser cladding alloy coating on the surface of a crystallizer and a preparation method thereof. The coating has properties such as high wear resistance, heat erosion resistance and high bonding force with a base material. Background technique [0002] Mold is a key component of continuous casting steel in steelmaking. During continuous casting, the molten steel is continuously cooled through the surface of the mold to directly cast a slab. The quality of the mold directly affects the surface quality of the continuous casting slab, the operating rate of the continuous casting machine and the continuous casting slab. Cost and tapping tonnage, etc. The development of high-efficiency continuous casting technology has put forward higher requirements for the quality of the mold. High strength, high wear resistance, corrosion resistance and good thermal conductivity have become important i...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies such as cracking, pores and poor wear resistance of the above-mentioned crystallizer coating, the object of the present invention is to provide a kind of laser cladding mold alloy coating, which satisfies the practicability of the laser cladding process on the surface of the crystallizer ( Avoid the occurrence of cracks and pores), and the laser cladding coating obtained at the same time meets the harsh working environment of the crystallizer, which can ultimately improve the performance and service life of the crystallizer

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