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Method for eliminating surface crystalline oxides of welded joint

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

Active Publication Date: 2020-09-15
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 surface crystalline oxides of welded joint
  • Method for eliminating surface crystalline oxides of welded joint
  • Method for eliminating surface crystalline oxides of welded joint

Examples

Experimental program
Comparison scheme
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 surface crystalline oxides of a welded joint and belongs to the technical field of steel welding. According to the method for eliminating the surfacecrystalline oxides of the welded joint, a first steel plate and a second steel plate are welded to form a welded joint, welding adopts a plasma welding method, the first steel plate and the second steel plate are both made of acid pickling plates, and according to the weight ratio, the content of Si is controlled to be smaller than or equal to 0.05% in the chemical ingredients of each acid pickling plate. By finding the main reason of generating surface crystalline oxides during plasma welding of the acid pickling plates, the technical means of controlling the mass fraction of the Si in the steel to be smaller than or equal to 0.05% is adopted, so that the problem that a weld joint generates surface oxides is solved, and the potential safety hazard that the oxides on the shell of a compression exceed the standard is eliminated. Practice verifies that by the adoption of the method for eliminating the surface crystalline oxides of the welded joint, the surface of the welded joint is smooth, and the crystalline oxides are not generated.

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 Applications(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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