Laser quick repair process method for large rotary machine bearing bush

A technology of large-scale rotating machinery and process methods, applied in the direction of metal material coating process, coating, etc., can solve the problems of complex process, poor bonding strength, high heat, etc., and achieve the effect of simple process, strong adaptability and strong versatility

Inactive Publication Date: 2013-12-18
岳阳大陆激光技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The above technologies have disadvantages such as complex process, poor bonding strength and high heat. Using laser cladding to achieve laser rapid repair of large rotating ma

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0031] In order to solve the problem of delamination and wear of the bronze alloy double-ring sealing tile babbitt alloy surface of a thermal power plant, the process of the present invention is used to realize the processing of the partial delamination and surface wear of the bronze alloy sealing tile babbitt alloy surface, the specific method as follows:

[0032] 1. Carry out coloring flaw detection and ultrasonic testing on the surface of Babbitt alloy to confirm the damage method and location;

[0033] 2. Adopt mechanical processing method to turn the fatigue wear layer on the entire surface of Babbitt alloy;

[0034] 3. Use manual grinding to polish the area where the babbitt alloy has delaminated until there is no delamination in the coloring flaw detection test. The babbitt alloy at the junction of the bronze alloy sealing tile is all cleaned up. See the color of the bronze alloy body;

[0035] 4. Clamp the sealing tile on the tooling chuck for laser cladding operation...

Embodiment approach 2

[0039] In order to repair several scratch grooves with a depth of 1.5-2.0mm and a width of 2-3mm on the surface of a 100WM generator supporting bearing in a thermal power plant, the babbitt alloy, the specific operation method is as follows:

[0040] 1. Carry out coloring flaw detection and ultrasonic testing on the surface of the supporting bearing Babbitt alloy to confirm that there is no delamination and cracks;

[0041] 2. Use manual methods to clean and polish the surface of the babbitt metal groove of the supporting bearing and clean the grease;

[0042] 3. Fix the supporting bearing bush and perform laser cladding operation on the groove. The process parameters of the laser cladding process are: power 1500W, spot diameter 3.0mm, scanning speed 12mm / s, focal length 300mm, lap rate 20%, preset powder thickness 1.2mm. The machining allowance is 0.8-1.2mm higher than the substrate surface;

[0043] 4. Use the manual clamp repair method, leaving a margin of 0.03-0.05mm for...

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PUM

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Abstract

The invention relates to the technical field of laser cladding, in particular to a laser quick repair process method for a large rotary machine bearing bush. According to the laser quick repair process method, a layer of purpose-made powdered materials capable of meeting operating requirements is arranged on the surface of a part in advance; then, high-energy laser beams are used for quick scanning processing on the coating; the powdered materials arranged in advance melt instantaneously and solidify; base metal below the coating melts into a thin layer along with the coating, molecular or atomic interdiffusion quickly occurs in a quite narrow area in a boundary between the thin layer and the coating, and solid metallurgical bonding is formed at the same time; a substrate is extremely little affected by heat under a rapid heating condition and does not deform. The laser quick repair process method for the large rotary machine bearing bush achieves the effect that a local and whole-area Babbitt metal laser cladding layer is formed on the substrate made of cast steel and bronze alloy, a Babbitt metal layer which is 1.0-15 mm is formed as required, and metallurgical bonding between Babbitt metal and various substrates is realized; the laser cladding layer is low in dilution, compact in structure and free of delaminating, air holes, slag inclusion, cracks and other quality defects.

Description

technical field [0001] The invention relates to the technical field of laser cladding, in particular to a laser rapid repair process for large-scale rotary machinery bearing bushes. Background technique [0002] With the needs of modern production and the needs of national economic development, especially in the field of energy, the performance requirements of large rotating machinery such as nuclear pumps, large thermal power generators, and compressors are getting higher and higher, and the corresponding supporting bearings have high performance and quality requirements. The quality of the bearing bush directly affects the normal operation and safe production of the unit. The bearing bush is made of cast steel and bronze alloy as the matrix, and the Babbitt alloy is cast on the matrix. In actual operation, due to various reasons, cracks, wear, scratches, delamination or burning of the bearing bushing Babbitt alloy will cause the normal operation and safe production of the...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22C13/02
Inventor 周武军
Owner 岳阳大陆激光技术有限公司
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