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A kind of welding method of zirconium alloy pressure vessel

A pressure vessel and welding method technology, applied in the welding field of pressure vessels, can solve problems such as defects, inert gas poisoning, lack of fusion, etc., and achieve the effects of improving welding quality, reducing labor intensity, and increasing welding deposition rate.

Active Publication Date: 2020-11-03
LUXI IND EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, domestic and foreign pressure vessel manufacturers mainly use manual welding to weld zirconium pressure vessels. This welding process has low work efficiency and a low pass rate of non-destructive testing.
During the welding process, due to the large number of welding layers, pores and unfused defects often occur, and workers who operate in an argon-rich state for a long time are prone to safety accidents caused by inert gas poisoning. This welding process has low efficiency and defects. more likely
[0006] In summary, the welding process of zirconium alloy pressure vessels in the prior art still has many problems in terms of welding efficiency and welding quality. Therefore, in order to improve the welding quality and work efficiency of zirconium alloy pressure vessels and reduce the labor intensity of welding operators, It is necessary to propose a new welding method for zirconium alloy pressure vessels

Method used

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  • A kind of welding method of zirconium alloy pressure vessel
  • A kind of welding method of zirconium alloy pressure vessel
  • A kind of welding method of zirconium alloy pressure vessel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A welding method for a zirconium alloy pressure vessel, specifically comprising the steps of:

[0037] 1) Preparation before welding: Process two R60702 zirconium alloy pressure vessel welding base materials with a thickness of 12mm into a V-shaped groove with a groove type of 60° on one side.

[0038] 2) Back cover: use plasma beam welding to quickly cover the groove of the base material to be welded in step 1), and the welding parameters are: current 200A, welding voltage 15V, ion gas flow rate 5L / min, and welding speed 105mm / min.

[0039] 3) Filling and covering: use automatic argon arc welding to fill and cover the groove after the bottom sealing in step 2), the grade of the welding wire is ERZr-2, and the diameter of the thick wire is 2mm; among them, the first filling and covering The welding parameters are: current 290A, welding voltage 16.5V, wire feeding speed 800mm / min, gas flow 10L / min, welding speed 95mm / min.

[0040] The welding parameters for the second f...

Embodiment 2

[0045] A welding method for a zirconium alloy pressure vessel, specifically comprising the steps of:

[0046] 1) Preparation before welding: Process two pieces of R60702 zirconium alloy pressure vessel welding base metal with a thickness of 10mm into a V-shaped groove with a groove type of 55° on one side, the blunt edge of the groove is 1.5mm, and connect the joints .

[0047] 2) Back cover: use plasma beam welding to quickly cover the groove of the base material to be welded in step 1), welding parameters are: current 210A, welding voltage 13V, ion gas flow rate 6L / min, welding speed 140mm / min.

[0048] 3) Filling and covering: use automatic argon arc welding to fill and cover the groove after the back sealing in step 2), the grade of the welding wire is ERZr-2, and the diameter of the thick wire is 2 mm; The welding parameters are: current 290A, welding voltage 16.5V, wire feeding speed 800mm / min, gas flow 15L / min, welding speed 105mm / min.

[0049] The welding parameters ...

Embodiment 3

[0054] A welding method for a zirconium alloy pressure vessel, specifically comprising the steps of:

[0055] 1) Preparation before welding: Process two R60702 zirconium alloy pressure vessel welding base materials with a thickness of 10mm into a V-shaped groove with a groove type of 58° on one side. The blunt edge of the groove is 2mm, and the joints are connected.

[0056] 2) Back cover: use plasma beam welding to quickly cover the groove of the base material to be welded in step 1), and the welding parameters are: current 210A, welding voltage 14V, ion gas flow rate 5.5L / min, and welding speed 120mm / min.

[0057] 3) Filling and covering: use automatic argon arc welding to fill and cover the groove after the back sealing in step 2), the grade of the welding wire is ERZr-2, and the diameter of the thick wire is 2 mm; The welding parameters are: current 290A, welding voltage 16.5V, wire feeding speed 800mm / min, gas flow 12L / min, welding speed 100mm / min.

[0058] The welding p...

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Abstract

The invention relates to a welding method of a zirconium alloy pressure vessel. The method comprises the following steps of 1, preparation before welding, wherein different zirconium alloy pressure vessel welding base materials are machined into one-sided V-shaped grooves, and the grooves are in butt joint with one another; 2, bottom sealing, wherein plasma beam welding is utilized to quickly sealthe bottoms of the grooves of the welding base materials in step 1; 3, filling of covering faces, wherein automatic argon arc welding is adopted to fill the grooves opening of which the bottoms are sealed in step 2 with covering faces, wherein filling of the covering faces is divided into five times, and each time of filling of the covering faces is immediately conducted on the basis of the lasttime. By means of the welding method of the zirconium alloy pressure vessel, the combined technology of plasma beam welding and phi 2.0 rough wire automatic argon arc welding is adopted by a large pressure vessel prepared from zirconium alloy for welding. Compared with a technology of purely adopting plasma beam welding or argon arc welding, by means of the combined welding technology, the weldingfrequency and the welding deposition rate can be greatly increased, and the labor intensity of workers is lowered.

Description

technical field [0001] The invention relates to the field of welding of pressure vessels, in particular to a welding method of zirconium alloy pressure vessels. Background technique [0002] Zirconium material (R60702) is a rare and precious metal with high melting point, which has broad application prospects in modern petrochemical industry and nuclear industry. R60702 material has excellent corrosion resistance in most organic acids, inorganic acids, strong alkalis and some molten salts. [0003] Argon arc welding technology is based on the principle of ordinary arc welding, using argon gas to protect the metal welding material, and through high current to make the welding material melt into a liquid state on the base material to be welded to form a molten pool, so that the welded metal and the welding material It is a welding technology that achieves metallurgical combination of materials. Since argon is continuously supplied during high-temperature fusion welding, the w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K28/02
CPCB23K28/02
Inventor 李建华张文明黄孝鹏张龙玲白忠建潘广明张云霞许燕芹贺庆帅王光净
Owner LUXI IND EQUIP