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Laser cladding repairing process of valve seat with high hardness and less deformation

A laser repair and laser cladding technology, applied in laser welding equipment, metal material coating process, manufacturing tools, etc., can solve the problems of large valve seat cost, increased burden on enterprises, etc., to achieve good weldability and optimized overlap , the effect of simple process flow

Active Publication Date: 2014-03-26
临沂人才数字科技集团有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

At present, most of the equipment of domestic petrochemical enterprises is imported equipment. When the valve seat is worn, corroded, or vaporized, it will cost a lot to order or repair it abroad, which increases the economic burden on the enterprise.

Method used

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Examples

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Comparison scheme
Effect test

Embodiment Construction

[0019] The specific steps of the laser repair process of the valve seat of the present embodiment are as follows:

[0020] A. Treat the surface of the valve seat to be repaired, and conduct failure analysis on the valve seat.

[0021] Remove the dust, oil, rust, etc. on the valve seat; detect the size of each part of the valve seat, determine the failure part and its wear amount, and check whether the valve seat is deformed; remove the fatigue layer of 0.5mm on the failure part of the valve seat by grinding, And clean it.

[0022] B. According to the failure analysis results of the valve seat, optimize the process parameters and carry out laser cladding.

[0023] The pre-set 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 parts to be repaired on the valve seat. The focus amount) is 270mm, the spot size is 10mm×1.8mm, the scanning speed is 120 mm / min, the overlapping amount is 6.5m...

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Abstract

The invention relates to a laser cladding repairing process of a valve seat. The process comprises the following steps: A, treating the surface of the valve seat, and carrying out failure analysis on the valve seat; B, optimizing the technical parameters for laser cladding according to the failure analysis results of the valve seat, wherein the alloy powder adopted comprises the following components in percentage by weight: 0.5-1% of C, 19-23% of Cr, 1.5-2% of B, 1-3% of Si, 0.05-0.5% of Mo, 0.05-0.5% of Mn, 7-9% of W, 2.5-4% of Ni and the balance of C; and C, detecting. According to the laser cladding repairing process of the valve seat, laser cladding is carried out on the surface of the valve seat, so that the size of the valve seat is recovered to meet the using demands, and the corrosion resistance and wear resistance of the repaired valve seat exceed the original performances.

Description

[0001] This application is a divisional application, the application number of the original application is: 201210351281.6, the application date: 2012-09-20, and the invention name is "Laser cladding repair process of valve seat". technical field [0002] The invention relates to a laser cladding method, in particular to a laser cladding repair method for a valve seat. Background technique [0003] Valve seats used in the petrochemical industry have relatively high requirements for corrosion resistance and wear resistance due to their working characteristics. At present, most of the equipment of domestic petrochemical enterprises is imported equipment. When the valve seat is worn, corroded, or vaporized, it will cost a lot to order or repair it abroad, which will increase the burden on the enterprise economically. [0004] Laser cladding refers to placing the selected coating material on the surface of the substrate to be clad in different ways, and then irradiating it with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/08C23C24/10B23K26/34C22C19/07
Inventor 邓琦林刘少彬何建方马万花
Owner 临沂人才数字科技集团有限公司
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