Iron powder electrode deposited metal with high strength and high toughness

A technology of iron powder welding rod and deposited metal, which is applied in the direction of metal processing equipment, welding medium, welding equipment, etc., to achieve high-efficiency welding, good welding processability, and high-strength maintenance

Inactive Publication Date: 2012-01-25
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These high strength electrodes are not currently used for hull structure welding

Method used

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  • Iron powder electrode deposited metal with high strength and high toughness
  • Iron powder electrode deposited metal with high strength and high toughness

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Embodiment 1

[0026] Using the welding rod with this deposited metal composition, the matching welding core is H08E, and welding 10CrNi3MoV steel. The deposited metal samples are prepared and the basic performance tests are carried out. The results are listed in Tables 1 to 3. Among them, Table 1 is the welding process parameters of the deposited metal test plate in the embodiment; Table 2 is the chemical composition of the deposited metal from formula 1 to formula 7; Table 3 is the mechanical properties of the deposited metal from formula 1 to formula 7.

[0027] Table 1 embodiment deposited metal test plate welding process parameters

[0028] Welding current, A

[0029] Table 2 Deposited metal chemical composition of formula one to formula seven

[0030] the element

[0031] Table 3 Deposited metal mechanical properties of formula one to formula seven

[0032]

[0033] Remarks: The formula numbers in Table 2 and Table 3 correspond to each other.

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Abstract

The invention belongs to the technical field of welding materials, and specifically introduces an iron powder electrode deposited metal with high strength and high toughness. Ingredients in mass percent include C 0.030 to 0.080, Mn 0.80 to 1.80, Si 0.20 to 0.50, Ni 2.30 to 3.50, Cr 0.10 to 0.25, Mo 0.10 to 0.25, Ti 0.010 to 0.040, S less than or equal to 0.010, P less than or equal to 0.016, the balance of Fe. By using the deposited metal for welding 10CrNi3MoV steels and 10CrNi4MoV steels, the technology is good, yield strength of welded joints is more than 600MPa, elongation percentage is more than 16%, section shrinkage rate is greater than 50%, impact energy under minus 50 DEG C is more than 34J; proportion of welding seam structure acicular ferrite is over 90%; deposition efficiency can be over 130%.

Description

technical field [0001] The invention relates to a technique in the field of welding materials, in particular to a high-strength and high-toughness iron powder welding rod deposited metal. Background technique [0002] At present, most of the manual electrodes used in the welding of hull structural steel in my country are ordinary low-alloy structural steel electrodes, using ordinary H08 welding cores, with excessive alloying elements in the coating, and the Ni content in the deposited metal is below 1.4%, such as 390MPa TH907 electrode, 440MPa TH945 electrode, etc. There is also research on welding rods for high-strength structural steels. For example, Chinese patent CN200310100196 introduces a welding rod whose deposited metal yield strength is above 950 MPa, Mn content is 1.2-1.9%, Mo precipitation strengthening is the main method, and Mo content is above 0.66%; Chinese patent CN03104883.8 introduces a welding rod, the yield strength of the deposited metal is above 760MPa,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30
Inventor 付学满丁永忠
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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