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High-strength and high-toughness low alloy steel electric welding rod

A low-alloy steel, high-toughness technology, applied in the field of manual welding electrodes, to achieve the effects of small spatter, excellent welding performance and stable arc

Active Publication Date: 2014-03-19
KUSN GINTUNE WELDING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the above-mentioned defects, the present invention provides a high-strength, high-toughness low-alloy steel welding electrode, which is suitable for both AC and DC, has excellent all-position welding performance, stable arc, no arc deviation, small spatter, and easy slag removal

Method used

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  • High-strength and high-toughness low alloy steel electric welding rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Adopt the general manufacturing process in the welding rod production industry, make the welding core according to the welding core formula in Table 1-1, prepare the welding rod coating according to the coating formula in Table 1-2 and prepare the welding rod coating by dry mixing and wet mixing, and apply the welding rod coating onto the core to form it:

[0058] Table 1-1 Solder core formula (unit: weight percentage)

[0059] C

Si

mn

Cr

Ni

P

S

Fe

0.03

0.2

0.35

0.10

0.10

0.010

0.010

margin

[0060] Table 1-2 drug skin formula (unit: weight percentage)

[0061]

[0062] The chemical composition of the deposited metal is shown in Table 1-3, the mechanical properties are shown in Table 1-4, and the content of diffusible hydrogen is shown in Table 1-5. The gas chromatography is used for the determination of diffusible hydrogen, and the average value of two pieces of tes...

Embodiment 2

[0070] Adopt the general manufacturing process in the welding rod production industry, make the welding core according to the welding core formula in Table 2-1, prepare the welding rod coating according to the coating formula in Table 2-2 and prepare the welding rod coating by dry mixing and wet mixing, and apply the welding rod coating onto the core to form it:

[0071] Table 2-1 Solder core formula (unit: weight percentage)

[0072] C

Si

mn

Cr

Ni

P

S

Fe

0.035

0.25

0.30

0.10

0.10

0.008

0.010

margin

[0073] Table 2-2 Drug skin formula (unit: weight percentage)

[0074]

[0075] The chemical composition of the deposited metal is shown in Table 2-3, the mechanical properties are shown in Table 2-4, and the content of diffusible hydrogen is shown in Table 2-5. The gas chromatography is used for the determination of diffusible hydrogen, and the average value of two test pieces...

Embodiment 3

[0083] Adopt the general manufacturing process in the welding rod production industry, make the welding core according to the welding core formula in Table 3-1, prepare the welding rod coating according to the coating formula in Table 3-2 and prepare the welding rod coating by dry mixing and wet mixing, and apply the welding rod coating onto the core to form it:

[0084] Table 3-1 Solder core formula (unit: weight percentage)

[0085] C

Si

mn

Cr

Ni

P

S

Fe

0.04

0.20

0.35

0.10

0.20

0.008

0.005

margin

[0086] Table 3-2 Drug skin formula (unit: weight percentage)

[0087]

[0088] The chemical composition of the deposited metal is shown in Table 3-3, the mechanical properties are shown in Table 3-4, and the content of diffusible hydrogen is shown in Table 3-5. The gas chromatography is used for the determination of diffusible hydrogen, and the average value of two test pieces ...

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Abstract

The invention publishes a high-strength and high-toughness low alloy steel electric welding rod, which consists of a core and a covering, wherein the covering is coated on the outer wall of the core, and the weight factor of the covering in the total weight of the welding rod is 0.4-0.5; the core comprises the following components in percentage by weight: 0.01-0.08 percent of C, 0.10-0.25 percent of Si, 0.30-0.55 percent of Mn, 0.005-0.20 percent of Cr, 0.005-0.30 percent of Ni, 0.007-0.012 percent of P, 0.007-0.012 percent of S and the balance of Fe; and the covering is of a basic slag system and comprises the following components in percentage by weight: 20-30 percent of calcium carbonate, 1-5 percent of magnesium carbonate, 5-10 percent of barium carbonate, 10-20 percent of calcium fluoride, 1-8 percent of cryolite, 1-5 percent of barium fluoride, 3-8 percent of rutile, 1-5 percent of titanium white, 2-10 percent of silicon dioxide, 5-10 percent of electrolytic manganese, 2-5 percent of ferrosilicon, 4-8 percent of nickel powder, 1-3 percent of chromium powder and 1-3 percent of molybdenum powder. The welding rod is adopted for welding; the strength of a welded joint is 800 MPa; the impact energy at -50 DEG C is greater than 60 J; the diffusible hydrogen content is 2-3 ml / 100 g; and the electric welding rod is mainly applied to welding of 80 kg of low alloy steel structure.

Description

technical field [0001] The invention relates to the field of welding materials, in particular to a manual electric welding electrode for 80-kg high-strength steel. Background technique [0002] With the further development of the machinery industry and manufacturing industry, in order to improve the performance of steel structure products, a large number of high-strength steels are used, which greatly increases the demand for matching welding materials. Generally speaking, as the strength of the welding material increases, the impact toughness of the deposited metal will decrease. How to balance the two has always been the pursuit of the goal. Contents of the invention [0003] In order to overcome the above-mentioned defects, the present invention provides a high-strength, high-toughness low-alloy steel welding electrode, which is suitable for both AC and DC, has excellent all-position welding performance, stable arc, no arc deviation, small spatter, and easy slag removal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/365
Inventor 蔡鸿祥陈国栋王登峰
Owner KUSN GINTUNE WELDING
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