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Manual Argon Arc Welding Process to Eliminate Incomplete Fusion Defects of Hastelloy Welds

A technology of manual argon arc welding and non-fusion defects, which is applied in the direction of welding equipment, welding medium, welding equipment, etc., can solve problems such as inter-pass, inter-layer and side wall non-fusion, so as to improve quality, reduce grinding amount, The effect of improving welding efficiency

Active Publication Date: 2021-10-08
上海电气核电集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a manual argon arc welding process for eliminating the non-fusion defect of the Hastelloy weld seam, so as to solve the problem of non-fusion defects of the weld seam between passes, layers and side walls in the Hastelloy welding process

Method used

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  • Manual Argon Arc Welding Process to Eliminate Incomplete Fusion Defects of Hastelloy Welds
  • Manual Argon Arc Welding Process to Eliminate Incomplete Fusion Defects of Hastelloy Welds
  • Manual Argon Arc Welding Process to Eliminate Incomplete Fusion Defects of Hastelloy Welds

Examples

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Embodiment 1 to 6

[0035] Such as figure 2 As shown, the present invention eliminates the manual argon arc welding process of the non-fusion defect of the Hastelloy weld seam, comprising the following steps:

[0036] S1. Process one side of the groove on the welding surfaces of the two base metals to be welded, and the base metal is Hastelloy;

[0037] S2. Aligning the grooves of the two base metals to be welded on one side to form a complete groove;

[0038] S3. Carry out the welding of the first layer of weld bead by manual argon arc welding to the groove, the welding current used is direct current, the welding material is nickel-based alloy welding wire, and the welding process parameters of backing welding are as shown in table 1;

[0039] S4. Perform interlayer grinding on the newly completed weld bead, and the flatness of the weld bead is ≤3mm;

[0040] S5. Carry out the welding of the nth layer of weld bead by manual argon arc welding to the groove, the welding current used is direct c...

Embodiment 7 to 9

[0051] The process steps of the manual argon arc welding process for eliminating the non-fusion defect of the Hastelloy weld seam in embodiments 7 to 9 are the same as in embodiment 1. Wherein, the protective gas in step S3 and step S5 is a helium-argon mixed gas, and the volume percentage of helium in the helium-argon mixed gas is shown in Table 2.

[0052]The volume percent of helium in the helium-argon mixed gas of table 2 embodiment 7 to 9

[0053] Example 7 Example 8 Example 9 The volume percentage of helium in the mixed gas of helium and argon 20％ 25％ 30％

[0054] The welding process parameters of Examples 7 to 9 are shown in Table 3.

[0055] The welding process parameter of table 3 embodiment 7 to 9

[0056]

[0057] In Embodiments 1 to 6, the shielding gas may also be a mixed gas of helium and argon, and the volume percentage of helium in the mixed gas of helium and argon is 20% to 30%.

[0058] By adding a certain volume percentage o...

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Abstract

The invention provides a manual argon arc welding process for eliminating unfused defects of Hastelloy weld seams. Through the setting of welding process parameters for each layer of weld bead, it effectively eliminates unfused defects between Hastelloy welds, layers and side walls. Fusion defects improve the quality of the weld, and through the above welding process, there is basically no need for grinding between passes, only interlayer grinding is required, which greatly reduces the amount of grinding and improves welding efficiency.

Description

technical field [0001] The invention relates to a manual argon arc welding process for eliminating non-fusion defects of Hastelloy weld seams. Background technique [0002] Hastelloy alloy is used as the base material of the main vessel of the thorium-based molten salt reactor, and the nickel content exceeds 70%. Hastelloy has poor droplet fluidity during the welding process, which is likely to cause unfused defects between channels, layers and side walls, such as figure 1 shown. How to eliminate the non-fusion defects between passes, layers and side walls of Hastelloy welds is an urgent problem to be solved in the Hastelloy welding process. Contents of the invention [0003] The object of the present invention is to provide a manual argon arc welding process for eliminating the non-fusion defects of Hastelloy weld seams, so as to solve the problems of non-fusion defects between passes, layers and side walls of weld seams in the Hastelloy welding process. [0004] In or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/16B23K9/235B23K35/30B23P17/00
CPCB23K9/16B23K9/235B23K35/0227B23K35/3033B23P17/00
Inventor 杨乘东张茂龙盛旭婷唐伟宝
Owner 上海电气核电集团有限公司
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