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Control method of copper-nickel alloy pipe welding porosity

A copper-nickel alloy tube and control method technology, applied in welding equipment, welding medium, welding equipment and other directions, can solve the problems of easy occurrence of welding porosity, many factors of porosity, difficult control of welding porosity, etc., to eliminate welding porosity, Ensure the effect of welding quality

Active Publication Date: 2015-08-19
SHANGHAI ZHENHUA HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual production, the main problem of copper-nickel alloy pipe welding is that welding porosity is prone to appear, and there are many factors that cause porosity, so welding porosity is difficult to control

Method used

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  • Control method of copper-nickel alloy pipe welding porosity
  • Control method of copper-nickel alloy pipe welding porosity
  • Control method of copper-nickel alloy pipe welding porosity

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0036] refer to figure 1 , the copper-nickel alloy pipe welding method of the present embodiment comprises:

[0037] Step S11, performing a prefabrication test of copper-nickel alloy pipe welding pores;

[0038] Step S12, analyzing the results of the prefabrication test to determine the cause of the welding porosity;

[0039] Step S13, according to the cause of the welding porosity, adopt the corresponding welding porosity control technology to weld the copper-nickel alloy pipe to avoid the welding porosity.

[0040] This embodiment has designed preferred welding air hole prefabrication test, as shown in table 1:

[0041] Table 1 Prefabrication test of copper-nickel alloy pipe welding porosity

[0042]

[0043] By comparing Group 1 and Group 2, the influence of ...

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Abstract

The invention provides a weld pore control method for nickel-copper alloy pipes, which comprises the following steps: carrying out a weld pore precasting test for the nickel-copper alloy pipes; analyzing the result of the precasting test so as to determine the cause of weld pores; according to the cause of the weld pores, adopting corresponding weld pore control technology to weld the nickel-copper alloy pipes so as to avoid the weld pores. The weld pore control method can eliminate the weld pores caused during welding of the nickel-copper alloy pipes and ensure the quality of a weld.

Description

technical field [0001] The invention relates to welding technology, in particular to a method for controlling the welding porosity of copper-nickel alloy pipes. Background technique [0002] Copper-nickel alloy pipes have good mechanical properties and seawater corrosion resistance, so they are widely used in marine seawater cooling piping systems and offshore oil drilling platform piping systems. The application of copper-nickel alloy tube can not only reduce the thickness of the tube wall, ensure the quality of the tube, but also prolong its service life. However, the thermal expansion coefficient and electrical conductivity of copper-nickel alloy tubes are much higher than those of carbon steel and low-alloy steel. It is difficult to weld, and defects such as pores and oxidation are prone to occur during welding. X-ray inspection is required after welding. [0003] The Chinese patent document with the publication number CN102091852 discloses a welding process for copper-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/167B23K9/32B23K35/38
Inventor 张华军吴世品包孔郭云飞
Owner SHANGHAI ZHENHUA HEAVY IND