Nickel-based alloy powder for high-speed laser cladding and cladding method of nickel-based alloy powder

Abstract

The invention provides nickel-based alloy powder for high-speed laser cladding and a cladding method of the nickel-based alloy powder, and relates to the technical field of inorganic materials. The nickel-based alloy powder comprises the components of 80wt%-83wt% of Ni, 10wt%-12wt% of Al, 4wt%-6wt% of Si, 1wt%-3wt% of WC, and the balance inevitable trace impurities. The invention further providesthe cladding method of the nickel-based alloy powder on a crystallizer copper plate base body. The cladding method mainly comprises the steps that the pretreated crystallizer copper plate base body ispreheated, and heat preservation is carried out on the crystallizer copper plate base body in the cladding process. A laser cladding layer coating obtained through the cladding mode of the nickel-based alloy powder on a crystallizer copper plate is high in binding force and good in compactness, and the crystallizer copper plate is heated lightly, so that the deformation amount is small; the crystallizer copper plate has good machinable machining performance, so that the abrasion resistance, corrosion resistance and cladding efficiency of a crystallizer are greatly improved; and the cladding method can be suitable for new manufacturing and repairing of the crystallizer copper plate, and has remarkable economic benefits and social benefits.

Description

technical field [0001] The invention relates to the technical field of inorganic materials, in particular to a nickel-based alloy powder for high-speed laser cladding and a cladding method thereof. Background technique [0002] The crystallizer is a water-cooled steel ingot mold, which is a very important part of the continuous casting machine, called the "heart" of the continuous casting equipment. Its function is to continuously condense high-temperature molten steel in the crystallizer to a billet of specified size and geometry, and pull it out at a certain speed. Indicators such as speed and production efficiency. With the continuous increase of my country's steel production, the development of continuous casting production is advancing by leaps and bounds, and the consumption of crystallizers in the continuous casting process is increasing. During the working process, the copper plate of the crystallizer suffers from severe friction and wear due to the erosion of high...

AI Technical Summary

Problems solved by technology

At present, the widely used copper crystallizer generally adopts electroplating method for surface treatment and surface modification to improve the wear resistance and corrosion resistance of the copper plate of the crystallizer, but the electroplating technology has the following shortcomings: It is a physical bond rather than a metallurgical bond. Frequent cold and heat fatigue, impact and friction of molten steel and billets often cause peeling and peeling of the coating during casting of the mold; 2) The coating has low hardness and poor wear resistance

In recent years, relevant institutions have been studying supersonic spraying and ordinary laser cladding coatings. Although supersonic spraying coatings have higher wear resistance than electroplating, they have defects such as poor bonding, easy cracking and easy peeling; ordinary laser cladding The advanced surface strengthening technology can obtain a well-bonded, wear-resistant and high-temperature-resistant alloy cladding layer on the surface of the copper substrate to solve the defects of poor bonding, easy cracking and easy peeling of other surface strengthening layers. Larger heating will lead to large deformation of the copper plate. It is only suitable for use when the copper plate is newly made, and cannot be used when the copper plate is repaired.

And because the materials selected for laser cladding are different, the properties of the cladding layer obtained on the surface of the copper substrate are different, which cannot meet the technical effects of applying different environments in different areas of the copper plate working surface of the crystallizer, and the cladding layer is prone to cracks

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