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1100Mpa grade high-strength high-toughness low-alloy steel electric welding rod

A low-alloy steel, high-strength technology, used in welding media, welding equipment, metal processing equipment, etc., can solve the problem of unsatisfactory matching effect, and achieve the effect of stable arc, small splash and easy slag removal.

Inactive Publication Date: 2017-02-22
KUSN GINTUNE WELDING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent CN200410037809.8 introduces the invention patent of "a high-strength welding electrode with good low-temperature toughness". The tensile strength of the deposited metal is about 850MPa, and the yield strength is about 810MPa. performance, but the matching effect with the base metal of 100 kg or higher strength is not ideal

Method used

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  • 1100Mpa grade high-strength high-toughness low-alloy steel electric welding rod
  • 1100Mpa grade high-strength high-toughness low-alloy steel electric welding rod
  • 1100Mpa grade high-strength high-toughness low-alloy steel electric welding rod

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 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:

[0049] Table 1-1 Solder core formula (unit: weight percentage)

[0050] C Si mn Cr Ni V P S Fe 0.066 0.007 0.44 0.007 0.014 0.002 0.007 0.006 margin

[0051] Table 1-2 drug skin formula (unit: weight percentage)

[0052]

[0053] The chemical properties are tested by a spark atomic emission spectrometer, the mechanical properties are tested by a tensile testing machine, a low-temperature tank, and an impact testing machine, and the diffusible hydrogen is tested by a gas chromatography diffusive hydrogen analyzer. The chemical composition of the deposited metal is shown in Tab...

Embodiment 2

[0061] 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:

[0062] Table 2-1 Solder core formula (unit: weight percentage)

[0063] C Si mn Cr Ni V P S Fe 0.066 0.007 0.42 0.007 0.013 0.002 0.006 0.006 margin

[0064] Table 2-2 Drug skin formula (unit: weight percentage)

[0065]

[0066] 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 to measure the diffusible hydrogen, and the average value of five pieces is tested:

[0067] Table 2-3 Chemical composition of deposited m...

Embodiment 3

[0075]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:

[0076] Table 3-1 Solder core formula (unit: weight percentage)

[0077] C Si mn Cr Ni V P S Fe 0.065 0.008 0.43 0.007 0.014 0.002 0.007 0.005 margin

[0078] Table 3-2 Drug skin formula (unit: weight percentage)

[0079]

[0080] The chemical properties are tested by a spark atomic emission spectrometer, the mechanical properties are tested by a tensile testing machine, a low-temperature tank, and an impact testing machine, and the diffusible hydrogen is tested by a gas chromatography diffusive hydrogen analyzer. The chemical composition of the deposited metal is shown in Tabl...

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Abstract

The invention discloses a 1100Mpa grade high-strength high-toughness low-alloy steel electric welding rod. Welding can be implemented by using the welding rod; the weld joint strength is greater than 1100Mpa; the impact power of the welding rod at minus 40 DEG C can be greater than 27J; the diffusible hydrogen content of the welding rod is within 2-3ml / 100g; and the welding rod is mainly applicable to welding of a low-alloy steel structure less than a grade of 100kg.

Description

technical field [0001] The invention belongs to the field of welding materials, in particular to an electric welding electrode for 1100MPa grade high-strength, high-toughness low-alloy 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 goal pursued by the industry. [0003] Chinese patent CN200410037809.8 introduces the invention patent of "a high-strength welding electrode with good low-temperature toughness". The tensile strength of the deposited metal is about 850MPa, and the yield strength is about 810MPa. Performance, but the matching effect with the bas...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/36
CPCB23K35/3073B23K35/3602
Inventor 蔡鸿祥陈国栋王登峰
Owner KUSN GINTUNE WELDING
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