A kind of iron-based amorphous coating and preparation method thereof

Abstract

The invention discloses an iron-based amorphous coating and a preparation method of the iron-based amorphous coating through a plasma surfacing method. Alloy powder is prepared after being made up according to a specific proportion, and an alloy coating is formed on the surface of a substrate through surfacing conducted by a plasma surfacing machine, and technological parameters are as follows, the welding voltage is 25-30 V, the welding current is 140-200 A, the welding speed is 35-40 mm / min, the shielding gas flow speed is 10-12 L / min, the powder feeding speed is 15-25 g / min, and the swing amplitude is 20-30 mm; and after the plasma surfacing is completed, the coating is awaited to be naturally cooled to the room temperature, and the preparation of the iron-based amorphous coating is completed. An iron-based surfacing coating prepared through the plasma surfacing method is high in hardness, good in abrasion resistance, and can be widely applied to the manufacturing and restoring of metallurgical machinery and petrochemical equipment. In addition, the plasma surfacing method for preparing the coating is simple in process, easy and convenient to operate and free of weld preheating and post-weld slow cooling; the coating after being subjected to the surfacing is free of cracks and peeling, and the coating is formed well.

Description

technical field [0001] The invention belongs to the technical field of coating materials, in particular to an iron-based amorphous coating and a preparation method thereof. Background technique [0002] Since its discovery, iron-based amorphous alloys have attracted much attention due to their ultra-high strength, low material cost, excellent soft magnetic properties, and good wear and corrosion resistance. However, due to the poor room temperature plasticity of iron-based amorphous alloys and the difficulty in preparing large-scale iron-based amorphous alloys, their application as structural materials is limited. Therefore, the application of amorphous alloys as coatings has become a promising research direction. Because the amorphous alloy coating is relatively easy to realize, people have successively developed a series of amorphous coating preparation methods such as thermal spraying, laser cladding, and electroless plating. However, the bonding strength between the am...

AI Technical Summary

Problems solved by technology

At present, the preparation methods of amorphous coatings reported in domestic and foreign patents are more thin coatings prepared by thermal spraying, laser cladding and other methods, while the surfacing method is relatively difficult to obtain amorphous coatings due to the low cooling rate in the process. Larger, making fewer patent reports in this area

Images