Composite solid self-lubricating alloy powder for scraper machine chute and preparation method thereof

Abstract

The invention relates to composite solid self-lubricating alloy powder for a scraping plate machine chute and a preparing method thereof. The powder is characterized in that the alloy powder comprises, by mass, 10%-13% of chrome, 4%-6% of nickel, 0.5%-1% of manganese, 1%-2% of molybdenum, 0.5%-1% of boron, 0.25%-0.5% of silicon, 1%-3.5% of rare earth oxide, 2%-8% of tungsten carbide, 2%-8% of carton, 2%-8% of hexagonal boron nitride, and the balance iron. By means of the composite solid self-lubricating alloy powder for the scraping plate machine chute and a preparing method thereof, the problem that the nonmetal phase in the alloy powder is prone to floating easily in a weld pool due to the small density feature in a laser cladding process is solved, and meanwhile, control over the size and granularity of grains is achieved. The alloy power is suitable for the laser cladding process, cracks are not likely to generate on a lubricating cladding layer after laser cladding is conducted, and meanwhile, the composite solid self-lubricating alloy powder has the good grain abrasion wear resistance, anti-corrosion performance and self-lubricating performance.

Description

technical field [0001] The invention relates to a self-lubricating alloy powder for laser cladding, in particular to a composite solid self-lubricating alloy powder for a scraper chute and a preparation method thereof. Background technique [0002] The chute of scraper conveyor in coal mine is an important consumable part in the coal mining process. Factors such as friction and impact between the chute of scraper conveyor and the scraper and materials cause wear of the chute, and at the same time, the conveyed material also corrodes the chute. These factors cause the scraper conveyor chute to be damaged due to wear, corrosion and other reasons during the normal conveying process, which makes the scraper conveyor chute have a short life and high consumption, resulting in a lot of waste of resources and low production efficiency. At present, the remanufacturing of the chute is a main means to reduce the cost and energy consumption of coal mining. Laser cladding process is cur...

AI Technical Summary

Problems solved by technology

When the laser cladding process continues to use thermal spraying self-fluxing alloy powder, there is a large gap between laser cladding and thermal spraying on the performance requirements of the alloy powder used, resulting in the use of existing thermal spraying self-fluxing alloy powder for laser cladding. The cladding layer is prone to cracks, and this phenomenon is particularly obvious when the hardness of the cladding layer is high. If cermet particles are added to the self-fluxing alloy powder in order to improve the properties of the cladding layer such as hardness, the ceramic phase and the cladding alloy and The thermal physical parameters of the base material vary greatly, and the interface is prone to adverse reactions, which promotes the generation of cracks and has poor abrasive wear resistance, which seriously affects the life of the chute.