Cold-rolled work roll with chromium carbide enhancement layers and preparation method of cold-rolled work roll

The invention belongs to the technical field of cold-rolled rolls, and particularly discloses a cold-rolled work roll with chromium carbide enhancement layers and a preparation method of the cold-rolled work roll. A cold-rolled work roll body is made of high-chrome alloy steel; a plurality of concaved tubular bodies are arranged on the surface of the body; and the chromium carbide enhancement layers are arranged on the surface of the cold-rolled work roll body and the inner surfaces of the tubular bodies. The preparation method of the cold-rolled work roll comprises the steps that a substrate is subjected to surface treatment; then laser drilling, acid pickling and ultrasonic cleaning are conducted; the cleaned substrate with the concaved tubular bodies is subjected to carburization in a vacuum carburizing furnace, and a composite body with the chromium carbide enhancement layers is obtained; and finally aftertreatment is conducted to obtain the cold-rolled work roll with the chromium carbide enhancement layers. The surface strength and hardness of an existing cold-rolled work roll are improved, heat resistance and abrasion resistance of the composite material are improved, the problem of peeling off of the roll surface of the cold-rolled work roll is solved, and the preparation method is simple and easy to implement.