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Root-welding welding rod capable of one-side welding and double-side forming

A technology of single-sided welding, double-sided welding and root welding, applied in welding media, welding equipment, welding/cutting media/materials, etc. The pool is clear and easy to control, the arc is stable, and the welding process is good.

Inactive Publication Date: 2014-06-25
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above three patents are all about cellulose electrodes, and the proposed electrodes cannot meet the root welding requirements of X80 and above pipeline steel, which is quite different from the application field of the patent of the present invention

Method used

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  • Root-welding welding rod capable of one-side welding and double-side forming
  • Root-welding welding rod capable of one-side welding and double-side forming
  • Root-welding welding rod capable of one-side welding and double-side forming

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Embodiment Construction

[0022] The present invention can be explained in detail through the following embodiments, and the purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0023] The specific composition of the electrode coating composition is shown in Table 1.

[0024] Table 1 Example composition ratio (wt%)

[0025]

[0026]

[0027] The chemical composition requirements of the main raw materials of the embodiment are shown in Table 2.

[0028] Table 2 The chemical composition of the main raw materials of the embodiment

[0029]

[0030] The chemical composition of the deposited metal is shown in Table 3.

[0031] Table 3 The chemical composition of the welding wire and deposited metal of the embodiment (wt%)

[0032]

[0033] The performance comparison of the embodiments is shown in Table 4.

[0034] Table 4 Example of the mechanical properties of deposited metal

[0035]

[0036] This patent proposes that the welding electrode has...

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Abstract

A root-welding welding rod capable of one-side welding and double-side forming comprises an H08E welding core and a coating. The coating is prepared by components including, by weight, 45-50% of marbles, 11-15% of fluorite, 1-2% of sodium carbonate, 3-5% of atomized ferrosilicon, 1-3% of flogopite, 3-5% of mid-carbon ferromanganese, 4-6% of dead-burned magnesite, 2-4% of terrotitanium, 1-3% of quartze and 16-20% of pure sodium silicate. The welding rod coating contains the marbles, the fluorite and rutile which are capable of slagging and gas making, deoxidized alloy transition element including manganese metal and the atomized ferrosilicon, pure sodium silicate binder and the flogopite and the sodium carbonate which are capable of improving compressive property. The root-welding welding rod is good in one-side welding and double-side forming, low in welding defect, stable in impact toughness and good in welding technology.

Description

Technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a single-sided welding double-sided forming root welding electrode. Background technique [0002] It is known that the pipeline steel used in the main roads of oil and gas pipelines is mainly X80 and above, which has high technical requirements and high requirements for the matching electrodes. For pipeline follow-up welding, when all-position welding is required, it can be welded on one side and on both sides; the defect rate of the weld is low, and the impact toughness is stable. Cellulose electrodes have been unable to meet the root welding requirements of X80 and above pipeline steel due to their high pore sensitivity and low impact toughness. Foreign countries have developed alkaline root welding electrodes that can meet the welding requirements of X80 and above pipeline steel. The LB-52U alkaline root welding electrodes (product samples and samples) of Kob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/365
CPCB23K35/3602B23K35/365
Inventor 王青云聂建航亢天佑
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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