A CMT Arc Surface Cladding Method Based on Database System

A technology of database and substrate surface, applied in metal material coating process, coating, etc., can solve the problems of cladding metal accumulation cladding efficiency, poor cladding metal spreadability, constant lap width, etc., and achieve residual stress value Low, excellent cladding effect, narrow heat-affected zone effect

Active Publication Date: 2021-11-30
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The arc surface cladding currently used usually has a fixed lap rate and lap width, which is prone to appear at the lap joints of the first few passes of cladding. Due to the low temperature of the substrate, the cladding metal has poor spreadability and is prone to poor fusion, etc. However, as the cladding process progresses, the temperature of the substrate material gradually rises, the wettability of the cladding metal is greatly improved, and the fusion width increases, but the lap width remains unchanged, so it is easy to cause local overheating and cladding metal accumulation and low cladding efficiency

Method used

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  • A CMT Arc Surface Cladding Method Based on Database System
  • A CMT Arc Surface Cladding Method Based on Database System

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Embodiment 1

[0040] This embodiment proposes a CMT arc surface cladding method based on a database system, such as figure 1 shown, including the following steps:

[0041] Step 1: Establish a cladding database of temperature-melting width-lap width;

[0042] Step 2: Use the established cladding database of temperature-melting width-lap width to carry out actual CMT arc surface cladding on the substrate;

[0043] The operation of the step 1 specifically includes:

[0044] Step 1.1: Grinding or turning the surface of the substrate to clean and remove the dirt on the surface of the substrate;

[0045] Step 1.2: Use a heating device to preheat the substrate after removing surface contamination to a temperature t 1 ;

[0046] Step 1.3: CMT arc is used to perform single-pass cladding on the surface of the substrate, and the parameters during the single-pass cladding operation are: wire feeding speed WFS =5.0m / min, CMT non-synthetic adjustment of arcing current I boost =320A, short circuit c...

Embodiment 2

[0053] In this embodiment, on the basis of the above-mentioned embodiment 1, in order to better realize the present invention, further, the preheating temperature range in the step 1.2 is 100-450°C, and the interval between two adjacent groups of preheating temperatures d is 50°C, and the temperature fluctuation is ±5°C.

[0054] Other parts of this embodiment are the same as those of Embodiment 1 above, so details are not repeated here.

Embodiment 3

[0056] In this embodiment, on the basis of any one of the above-mentioned embodiments 1-2, in order to better realize the present invention, further, in the step 1.1, after cleaning and removing the dirt on the surface of the substrate, anhydrous Ethanol for cleaning.

[0057] In the step 1.2, after preheating to temperature t1, keep preheating for at least 3s before the welding torch starts arcing, and then turn off the preheating device.

[0058] Further, in the step 1.3, during the single pass cladding on the surface of the substrate using the CMT arc, the welding torch and the cladding direction always maintain an inclination angle of 75°.

[0059] Further, the method for counting the width of the cladding layer in the step 1.4 is to measure the width of the single-pass cladding layer at the arc-starting end 1cm, the 1 / 2 cladding layer length and the arc-ending end 1cm The width of the three positions is averaged After the value is used as the melting width data d at the ...

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Abstract

The invention provides a CMT arc surface cladding method based on a database system, which belongs to the technical field of metal surface cladding. The working mode of the database system is as follows: the CMT arc is selected as the heat source, and the alloy material is rapidly melted on the surface of the workpiece to be clad Cladding, real-time monitoring of the temperature of the place to be clad, through the database system of temperature - cladding layer width - lap width, automatically match the lap width according to the temperature of the place to be clad. Through a large number of pre-tests, the present invention establishes a database for optimal matching of temperature-cladding layer width-lap width, and aims at the problems of poor fusion in the early stage and low efficiency in the later stage of the fixed lap width of the current surface cladding process. The method of overlapping width realizes efficient and defect-free rapid cladding of alloys.

Description

technical field [0001] The invention belongs to the technical field of combining computer data and mechanical processing, and in particular relates to a CMT arc surface cladding method based on a database system. Background technique [0002] Nickel-based superalloys are widely used in aerospace, petroleum and nuclear power industries due to their excellent high temperature resistance, corrosion resistance, fatigue resistance and weldability. With the increasing emphasis on lightweight requirements, nickel-based superalloys such as GH4169 alloys are difficult to put into use in large quantities due to their high density and overweight components, and the high content of Nb elements in this alloy has always led to high manufacturing costs of components. solve. Therefore, cladding a layer of dense superalloy on the surface of an alternative metal, such as stainless steel, can ensure the high temperature resistance and corrosion resistance of the component, and greatly reduce ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C26/02
CPCC23C26/02
Inventor 王大为漆林黄崇权荣鹏高川云
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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