Steel knife for metal 3D printing

The utility model discloses a steel knife for metal 3D printing, which comprises a steel knife body, the working surface of the steel knife body is divided into a front cutting area and a rear powder laying area according to the walking direction of the steel knife, a plurality of cutting knives which are transversely arranged are arranged on the front cutting area, main cutting edges are formed on the cutting knives, and a first oblique angle is formed between the main cutting edges and the walking direction of the steel knife. A flow guide groove is formed between every two adjacent cutters, a powder storage groove is formed between the front cutting area and the rear powder laying area, the flow guide grooves communicate with the powder storage groove, and a powder laying part used for laying powder on a printing breadth according to the thickness requirement is arranged on the rear powder laying area. According to the steel knife, an existing powder laying steel knife is improved, the cutting function is