Method for strengthening scraper by laser

The invention discloses a method for strengthening a scraper by laser, belonging to the technical field of laser cladding. The technical scheme of the invention is as follows: the method for strengthening the scraper by laser comprises the following steps: 1), polishing the surface of the scraper, scaling, deslagging, and carrying out deoiling cleaning on the surface with alcohol; 2), synchronously carrying out powder feeding and laser cladding in one work step under the feed motion coordination of an X linear axle and a Y linear axle of a laser head, wherein the laser output power is 6.8kw, the scanning speed is 600 mm/min, the powder feeding rate is 18g/min, and laser beams are 15*2.5 broadband rectangular light spots; and cladding metal powder at a wearing position to form a laser enhanced layer with cladding thickness of 3mm, wherein the selected metal powder materials comprises the following components in percentage by weight: 65.93% of Fe, 0.07% of C, 0.8% of Si, 0.6% of Mn, 18.1% of Cr, 12.2% of Ni and