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Surface crack renovation method for key elements of chain grate

A repairing method and a technology for surface cracks, which are applied in the coating process of metal materials, coatings, etc., can solve the problems of cumbersome process, unfavorable real-time operation, long processing time, etc. The effect of little damage

Inactive Publication Date: 2009-04-08
江苏宏大特种钢机械厂有限公司 +1
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AI Technical Summary

Problems solved by technology

Repairing damaged metal structural parts with composite material patches is a reliable low-cost and high-efficiency structural reinforcement and life extension method, but it requires high-temperature curing treatment during the action process, and the processing time is long and the process is cumbersome, which is not conducive to real-time operation on site
So far, there are very few technologies that are actually used in the maintenance and remanufacturing of metal structural parts on a large scale. It is urgent to develop new theories, processes and technologies, enrich the repair and remanufacturing technology of metal structural parts, and provide more information for people to formulate the best maintenance plan. many choices

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  • Surface crack renovation method for key elements of chain grate
  • Surface crack renovation method for key elements of chain grate

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Embodiment Construction

[0023] Embodiment: select the small shaft of the grate machine to do the surface crack repair test, the repair process is as follows figure 1 shown. Experimental material: 12CrMoV. Firstly, detect surface cracks on the surface of the small shaft of the grate, install two eddy current sensors on the surface of the tested workpiece, and determine the specific part of the crack on the surface of the part through the detected sensor signal, and determine the laser cladding treatment part.

[0024] Broadband laser cladding test using NEL-2000A fast axial flow industrial CO 2 Laser, the laser output beam is a multi-order mode, the output power is 2500W, the scanning speed is 2mm / s, the spot size is 15mm×2mm, the focal length is 315mm, the powder is preset on the surface of the substrate, and the thickness is about 115mm. A single scan is performed on the surface, and the thickness of the formed cladding layer is about 1 mm. The sample is cut in the direction perpendicular to the s...

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Abstract

The invention discloses a method for repairing cracks on the surface of key parts of a chain grate and relates to the technical field of machinery manufacture and material processing and application. The method comprises the following steps: firstly, according to the condition of cracks on the surface of the key parts of the chain grate, the cracks are polished and cut to remove the cracks completely, then laser cladding is carried out on the crack area by laser cladding technology, and laser-shock processing is carried out on the key parts of the chain grate after the laser cladding repair. The method has the advantages of simple process method, no need of vacuum and preheating, small damage to the base material of the key parts of the chain grate, realizing non-destructive repair of the cracks on the surface of the key parts of the chain grate and reducing the repair cost.

Description

technical field [0001] The invention relates to the technical field of mechanical manufacturing and material processing and processing applications, in particular to a method for repairing surface cracks of key components of a chain grate, and is especially suitable for repairing surface cracks of large-area and thick materials of key parts. Background technique [0002] In advanced manufacturing technology, laser shock processing technology, as a typical representative of high-energy beam, is a processing method with good prospects. Its principle is that the shock wave induced by high-energy short-pulse laser interacts with the material. The high-pressure shock waves generated are used to improve the mechanical properties of materials, especially crack fatigue life. This technology has been widely used in mechanical engineering, shipbuilding, aviation, microelectronics and other industries. [0003] Laser cladding, also known as laser cladding or laser cladding, is an impo...

Claims

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Application Information

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IPC IPC(8): C23C24/10B23P6/00
Inventor 任旭东冯爱新朱圣财杨继昌张永康李伯全张西良司乃潮吴强
Owner 江苏宏大特种钢机械厂有限公司
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