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Method for Eliminating Crystalline Oxides on the Surface of Welded Joints

A welding joint and crystalline technology, which is applied in the field of eliminating crystalline oxides on the surface of welding joints, can solve the problems of increased process cost and unclean oxide removal, and achieves the elimination of hidden safety hazards, excellent product surface quality and difficult removal Effect

Active Publication Date: 2021-10-08
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This will either increase the cost of the process, or the removal of oxides will not be clean, which has certain limitations.

Method used

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  • Method for Eliminating Crystalline Oxides on the Surface of Welded Joints
  • Method for Eliminating Crystalline Oxides on the Surface of Welded Joints
  • Method for Eliminating Crystalline Oxides on the Surface of Welded Joints

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Effect test

Embodiment 1

[0022] Embodiment 1: It is carried out by using the conventional plasma welding process of pickling plate, and the welding process parameters are shown in Table 1. The Si element mass percentage value of the pickling board is 0.01%, and the specific chemical composition is shown in Table 2. After implementation, no crystalline oxide was found on the surface of the weld. For the organization of each area of ​​the welded joint, see image 3 , Figure 4 .

Embodiment 2

[0023] Embodiment 2: implement according to the welding process of embodiment 1. The mass percentage value of Si element in the chemical composition of the pickling board is 0.03%, and the specific chemical composition is shown in Table 2. After implementation, no crystalline oxide was found on the surface of the weld. The regional organization of welded joints and image 3 , Figure 4 approximate.

Embodiment 3

[0024] Embodiment 3: implement according to the welding process of embodiment 1. The mass percentage value of Si element in the chemical composition of the pickling board is 0.05%, and the specific chemical composition is shown in Table 2. After implementation, no crystalline oxide was found on the surface of the weld. The regional organization of welded joints and image 3 , Figure 4 approximate.

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Abstract

The invention relates to a method for eliminating crystalline oxides on the surface of welded joints, belonging to the technical field of steel welding. The method for eliminating the crystalline oxide on the surface of the welded joint is to form the welded joint by welding the first steel plate and the second steel plate. The welding adopts the plasma welding method. In the chemical composition of the pickling board, the Si content is controlled to be ≤0.05%. The present invention finds the main cause of surface crystalline oxides produced by plasma welding of pickling plates, and adopts the technical means of controlling the Si mass fraction in the steel to be ≤0.05%, so as to solve the problem of surface oxides produced by welds and eliminate the oxides on the shell of the compressor. Exceeding safety hazards. It has been verified by practice that after the implementation of the invention, the surface of the welded joint is smooth and clean, and no crystalline oxide is produced.

Description

technical field [0001] The invention relates to a method for eliminating crystalline oxides on the surface of welded joints, belonging to the technical field of steel welding. Background technique [0002] Since the existence of any impurities in the compressor will affect its service life, it may also cause safety hazards. Therefore, in the assembly and production of compressors, reducing the existence of compressor impurities is a very important issue. In the current assembly and production process of compressors, several welding processes produce oxide scales on the surface of the inner shell of the compressor to varying degrees, and after the oxide scales fall off, they become the main part of impurities in the compressor. Therefore, eliminating the generation of scale is an urgent technical problem to be solved in the assembly and production of our compressors. [0003] At present, according to the literature consulted, many institutions are studying the removal method...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K10/02C22C38/00C22C38/02C22C38/04C22C38/06C22C38/14
CPCB23K10/02C22C38/002C22C38/02C22C38/04C22C38/06C22C38/14
Inventor 周磊磊余腾义靳阳王亮赟
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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