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Repairing technology for ultrasound rolling strengthening of shaft type component surface laser cladding layer

A technology of ultrasonic rolling and laser cladding, which is applied in the coating process and coating of metal materials, can solve the problems of poor surface fatigue performance, and achieve the effects of improving fatigue performance, simple operation, and fine grains

Inactive Publication Date: 2019-02-15
NANCHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the fatigue performance of the surface repaired by this method is poor

Method used

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  • Repairing technology for ultrasound rolling strengthening of shaft type component surface laser cladding layer
  • Repairing technology for ultrasound rolling strengthening of shaft type component surface laser cladding layer
  • Repairing technology for ultrasound rolling strengthening of shaft type component surface laser cladding layer

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Embodiment 1

[0035] Embodiment 1 provides a repair process for ultrasonic rolling to strengthen the laser cladding layer on the surface of shaft parts:

[0036] In the embodiment of the present invention, the object to be repaired is a kind of stirring shaft of mining machinery. Cr≤0.25, Ni≤0.30Cu≤0.25; obvious wear can be seen on the surface.

[0037] Specifically follow the steps below:

[0038] S1, carry out the first turning process (rough turning) on ​​the outer circle surface of the shaft to be repaired, remove a certain amount of outer circle surface layer; carry out rough turning on the outer circle surface of the shaft to be repaired, and the rough turning speed is 180-220r / min , the feed rate is 0.3-0.5mm / r, and the cutting rate is 0.3-0.5mm;

[0039] S2, laser cladding, the thickness of laser cladding can be adjusted according to the specific requirements; Covering thickness, if you need to change the powder feeding amount, you can adjust it by the above two parameters), the ...

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Abstract

The invention discloses a repairing technology for ultrasound rolling strengthening treatment of a shaft outer circle surface laser cladding layer, and belongs to the technology of shaft type component repairing and strengthening. The repairing technology specifically comprises the steps that to remove surface impurities and make the cladding layer and a base body have good bonding strength, first-time turning machining is conducted on the surface of a shaft needing to be repaired, a certain amount of outer circle surface layer is removed, then, laser cladding is conducted, the diameter of theshaft obtained after laser cladding is slightly larger than the diameter of the surface of the finally-repaired shaft, then, second-time turning machining is conducted on the cladding surface, finally, ultrasound rolling strengthening is conducted, and accordingly the final repairing diameter is formed. According to the repairing technology, operation is simple, the repairing layer is high in hardness, good metallurgy bonding is formed between the repairing layer and the base body, and disengaging is avoided; and after ultrasound rolling, surface-layer grains are fine, large residual compressive stress is formed, accordingly, the fatigue performance of the shaft is improved, and the shaft can be a stirring shaft with a stirring function in mine machines.

Description

technical field [0001] The invention relates to the technical field of repairing and strengthening of shaft parts, and more specifically relates to a repairing process of ultrasonic rolling strengthening laser cladding layer on the surface of shaft parts. Background technique [0002] Laser cladding technology is an effective remanufacturing technology. It puts the selected coating material on the surface of the cladding substrate in different ways, and then irradiates it with laser to melt it and a thin layer on the surface of the substrate at the same time, and after rapid solidification, it forms a very low dilution and forms a coating with the substrate. Metallurgically bonded surface coating, a process method that significantly improves the wear resistance, corrosion resistance, heat resistance, oxidation resistance and electrical properties of the base surface, so as to achieve the purpose of surface modification or repair, which not only meets the requirements for the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B23P6/00
CPCC23C24/106B23P6/00
Inventor 叶寒朱晋姝王文琴刘伟航占文锋刘勇
Owner NANCHANG UNIV
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