Laser cladding repair process of thin-walled sleeve favorable for reducing build-up welding stress and deformation

Abstract

The invention relates to a laser repair process of a thin-walled sleeve. The laser repair process comprises the following steps: A) performing treatment on the surface of the thin-walled sleeve, and performing failure analysis; B) fixing an inner hole of the thin-walled sleeve by using a tool; C) performing laser cladding, and cooling other parts except the part to be repaired during laser cladding, wherein the adopted alloy powder comprises the following components in percentage by weight: not more than 0.03% of C, 18%-22% of Cr, 0.5%-1.2% of Si,10%-15% of Ni, 2.0%-3.0% of Mo, 1.0%-2.0% of Mn, 1.0%-2.0% of W and the balance of Fe; D) detecting; E) assembling and simultaneously dismantling the tool. According to the laser repair process of the thin-walled sleeve, the laser cladding can be performed on the surface of the thin-walled sleeve, so that the size of the thin-walled sleeve can be restored to meet the using requirements, the deformation of the product after repair is very small, and the hardness and corrosion resistance of the thin-walled sleeve after repair exceed the original properties.

Description

[0001] This application is a divisional application, the application number of the original application is: 201210351277.X, the application date: 2012-09-20, and the invention name is "Laser Cladding Repair Technology for Thin-walled Sleeves". technical field [0002] The invention relates to a laser cladding method, in particular to a laser cladding repair method for a thin-walled sleeve. Background technique [0003] Thin-wall sleeves with a diameter of 1500mm and a thickness of less than 10mm are widely used in the petrochemical industry. At present, the quality and precision of domestic thin-walled sleeves cannot meet the requirements, so mainly imported products are used, resulting in high prices for new products and higher maintenance costs. Due to the action of chemical gas and the influence of the use environment during use, the thin-walled sleeve will wear or evaporate and blow away locally, and it needs to be repaired by surfacing welding. The existing arc surfaci...

AI Technical Summary

Problems solved by technology

The existing arc surfacing welding has a high dilution rate and a large heat-affected zone. It is difficult to meet the repair accuracy requirements for this kind of thin-walled sleeve with high matching precision requirements.