Laser repairing process for high-speed speed-changing gear box with high wear resistance, high hardness and controllable overall deformation
A gearbox body and laser repair technology, which is applied in the field of laser cladding technology, can solve problems such as partial wear, box deformation, failure, etc., and achieve the effects of reducing cladding deformation, less heat input, and reducing impact
Inactive Publication Date: 2016-10-12
蒋超
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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
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0013] The laser repair process of the high-speed gear case body of the present embodiment, the specific steps are as follows:
[0014] A. Treat the surface of the gear box that needs to be repaired, and conduct failure analysis;
[0015] B. Preheat the gear box, and at the same time preheat the part of the box to be repaired at 200°C locally;
[0016] C. According to the results of the failure analysis, the process parameters are optimized, and laser cladding is carried out layer by layer. The laser cladding starts from the lowest point on the surface of the box. The thickness of each layer of cladding layer is less than or equal to 0.3mm, and the last layer of cladding layer covers the On the previous cladding layer;
[0017] The preset powder feeding method is adopted, and the fast cross-flow carbon dioxide laser is used as the light source to continuously overlap and scan the gears; the laser power is 1.9KW, the elevation is 270mm, the spot size is 10mm×1.8mm, and the s...
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Abstract
The invention relates to a laser repairing process for a high-speed speed-changing gear box with high wear resistance, high hardness and controllable overall deformation. The process comprises the following specific steps: A, treating the surface of the speed-changing gear box, and performing failure analysis; B, preheating the speed-changing gear box, and performing local preheating at the temperature of 180-220 DEG C on a to-be-repaired position of the box; C, optimizing process parameters according to a failure analysis result, performing layer-by-layer laser cladding, by starting laser cladding from a lowest point on the surface of the box, wherein the thickness of each cladding layer is smaller than or equal to 0.3mm, a next cladding layer covers a previous cladding layer, and adopted alloy powder is prepared from the following components in percentage by weight: 0.5-1.0 percent of C, 19-23 percent of Cr, 2.0-5.0 percent of Si, 1.5-2.0 percent of B, 3.0-5.0 percent of W, 12-14 percent of Ni and the balance of Fe; D, performing detection. Only de-oiling treatment at the temperature of 200 DEG C needs to be performed on the box, preheating to a high temperature is not needed, and the overall deformation is controlled, so that performance influence to a structure except a cladding position can be lowered, 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 ...
Claims
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IPC IPC(8): C23C24/10C22C38/54C22C38/44
CPCC22C38/02C22C38/34C22C38/44C22C38/54C23C24/103C23C24/106
Inventor 不公告发明人
Owner 蒋超