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Cold welding repair method for laser surface cladding hydraulic vertical column

A technology of hydraulic column and repair method, applied in the field of cold welding repair, can solve problems such as corrosion in repaired area or adjacent area, and achieve the effect of saving repair cost

Active Publication Date: 2019-02-19
XIAN BESAME LASER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problem that after the existing high-energy pulse cold welding repairs laser surface cladding hydraulic columns, the repaired area tends to wear out before other areas of the workpiece, and corrosion often occurs in the repaired area or adjacent areas, the present invention provides a laser surface cladding hydraulic column. Cold welding repair method of column

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In this example, the specification of the hydraulic column to be repaired is Φ115×1075mm; the cladding material of the hydraulic column is Fe-Cr-B-Si self-fluxing alloy powder, and pores of Φ1mm appear on the cladding surface after grinding .

[0031] Follow the steps below to repair the laser surface cladding hydraulic column to be repaired in this embodiment:

[0032] 1) Clean and degrease the air hole;

[0033] 2) Grinding and reaming with electric grinding head;

[0034] 3) Place Fe-Cr-B-Si self-fluxing alloy powder with a thickness of 0.3mm as the cold welding material.

[0035] 4) The welding current of the cold welding machine is 30A, the pulse frequency is 3HZ, and the pulse width is 30ms, and the high-energy pulse cold welding process is used for cold welding repair;

[0036] 5) After the repair is completed, carry out filing processing to the required surface roughness.

Embodiment 2

[0038] In this embodiment, the size of the hydraulic column to be repaired is Φ260×1100 mm by cladding the laser surface; the cladding material of the hydraulic column is Fe-Cr-B-Si self-fluxing alloy powder. Wear defects of 10mm long, 2mm wide and 0.4mm deep appeared on the cladding surface of the hydraulic column during use.

[0039] Follow the steps below to repair the laser surface cladding hydraulic column to be repaired in this embodiment:

[0040] 1) Clean and degrease the wear defect;

[0041] 2) Grinding with an angle grinder;

[0042] 3) Place the Fe-Cr-B-Si cladding layer cutting material with a thickness of 0.5mm;

[0043] 4) Set the welding current of the cold welding machine to 90A, the pulse frequency to 5HZ, and the pulse width to 80ms, and use the high-energy pulse cold welding process for cold welding repair;

[0044] 5) After the repair is completed, grind to the required surface roughness.

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Abstract

The invention relates to a cold welding repair method. The problems that after a laser surface cladding hydraulic vertical column is repaired through high-energy pulse cold welding, the repaired zoneof the laser surface cladding hydraulic vertical column is often abraded earlier than other zones of the workpiece, and the repaired zone or the adjacent zone is corroded are solved. Through the coldwelding repair method for the laser surface cladding hydraulic vertical column, the defective part after repairing of the laser surface cladding hydraulic vertical column has the same abrasion resistance or corrosion resistance as the laser cladding layer. The method comprises the following steps that (1) the hydraulic vertical column is subjected to cleaning and oil removal; (2) the defective zone of the hydraulic vertical column is polished; (3) a cold welding material is prepared, and the prepared cold welding material is made of a material which has the same chemical components as that ofa laser cladding material; (4) repairing is conducted through the high-energy pulse cold welding technology; and (5) the defective zone of the hydraulic vertical column is subjected to follow-up machining till the surface roughness of the hydraulic vertical column reaches the standard.

Description

technical field [0001] The invention relates to a cold welding repair method, in particular to a cold welding repair method for a laser surface cladding hydraulic column. Background technique [0002] Laser surface cladding technology is to add cladding materials with different components on the surface of the substrate, and use high-energy laser beams to irradiate the cladding materials, so that the cladding materials and the substrate are rapidly melted and solidified at the same time, forming a metallurgical bond with good metallurgical bonding and extremely low dilution. Surface protection. Laser surface cladding technology has significantly improved the corrosion resistance, wear resistance, heat resistance, oxidation resistance and other properties of the base metal surface, and has been widely used in many industrial fields such as coal, steel, electric power, railways, and ships. [0003] In the subsequent grinding process and use of laser cladding hydraulic columns...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P6/00
CPCB23P6/00
Inventor 王晓飚王永芳杜超飞曹伟业
Owner XIAN BESAME LASER TECH CO LTD