Laser repair technology of high-speed gearbox casing

Abstract

The invention relates to a laser repair technology of a high-speed gearbox casing. The laser repair technology comprises the following concrete steps: A. treating the surface of a gearbox, and carrying out failure analysis; B. preheating the gearbox casing, and locally preheating a to-be-repaired part of the casing at the temperature of 180-220 DEG C at the same time; C. optimizing technological parameters according to the result of the failure analysis, and carrying out laser cladding layer by layer, specifically, carrying out laser cladding from the lowest point of the surface of the casing, wherein the thickness of each cladding layer is less than or equal to 0.3mm, the following cladding layer covers the previous cladding layer, and adopted alloy powder is prepared from the following components by weight percent: 0.5-1.0% of C, 19-23% of Cr, 2.0-5.0% of Si, 1.5-2.0% of B, 3.0-5.0% of W, 12-14% of Ni and the balance of Fe; D. detecting. According to the laser repair technology, the casing is only needed to be treated by deoiling at the temperature of 200 DEG C without needing to be preheated to a higher temperature, so that overall deformation is controlled; therefore, the influence on the properties of structures except the cladding part can be reduced, and cladding deformation is reduced.

Description

technical field [0001] The invention relates to a laser cladding process for an industrial gear box, in particular to a laser repair process for a high-speed gear box body. Background technique [0002] In the industry, transmissions are used in every industry. When the gear transmission is subjected to a huge torque in the transmission, it will cause biased wear to the bearing position of the transmission, resulting in failure. Domestic steel mills fail gears and bearings due to damage to the transmission every year. The direct economic loss is tens of millions of yuan. The design and manufacture of gearboxes are usually made of cast steel and plate parts, and the weldability of cast iron and cast steel is extremely poor. The use of ordinary surfacing welding methods can easily lead to deformation and welding cracks of the box, making the Repair effect failed. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a ...

AI Technical Summary

Problems solved by technology

[0002] In the industry, transmissions are used in every industry. When the gear transmission is subjected to a huge torque in the transmission, it will cause biased wear to the bearing position of the transmission, resulting in failure. Domestic steel mills fail gears and bearings due to damage to the transmission every year. Direct economic loss of tens of millions of yuan

The design and manufacture of gearboxes are usually made of cast steel and plate parts, and the weldability of cast iron and cast steel is extremely poor. The use of ordinary surfacing welding methods can easily lead to deformation and welding cracks of the box, making the Repair effect failed