Preparation method of wear-resistant coating on surface of roller

Abstract

The invention discloses a preparation method of a wear-resistant coating on the surface of a roller. The preparation method is characterized by comprising the steps: (1) pretreating the surface of the roller; (2) selecting an alloy powder, and regulating an automatic powder feeding device; (3) regulating a light beam: selecting a 10*1mm broadband integral mirror, and regulating a defocusing amount to focus laser spots in a rectangular shape; (4) selecting a CO2 laser to carry out laser cladding on a wear and etch resistant coating, automatically feeding the alloy powder into a laser molten pool by adopting a synchronous powder feeding device, enabling a high-power focusing laser beam and an automatic powder feeding hole to be axially fed along the roller, rotating by setting a rotational speed, and forming a uniform and dense laser cladding layer on the processing surface of roller; (5) carrying out flaw detection after cladding. With the adoption of the preparation method, a strengthening layer formed by laser cladding can be used for remarkably improving the rigidity, the wear resistance and the contact fatigue resistance on the surface of the roller of a hot rolled plate.

Description

technical field [0001] The invention relates to a method for preparing a wear-resistant coating on the surface of metallurgical equipment components, in particular to a method for preparing a wear-resistant coating on the surface of a roll by adopting laser cladding technology, which belongs to the technical field of laser cladding. Background technique [0002] The roll is an important spare part on the plate rolling production line. Its quality and service life directly affect the consumption of the roll, the quality of the steel, the maintenance cost, the operating rate of the rolling mill, and ultimately the production cost of the steel. The reasons for the failure of the roll: first, the alternating thermal cycle, and the thermal fatigue cracks on the roll surface after a period of use; second, the metal wear and the abrasive wear caused by the scale between the roll surface and the steel strip. Excessive impact often causes damage to the roll. Domestic methods for rol...

AI Technical Summary

Problems solved by technology

However, for other specific equipment components, such as specific structures such as hot-rolled sheet rolling rolls, the process parameters provided by the existing laser cladding process are obviously unable to adapt

[0010] After searching and checking by the applicant: the use of laser cladding technology to prepare a heat-resistant and wear-resistant alloy coating on the surface of the roll, there is no precedent in China, and there is no related foreign to report