High-deposition-rate and low-hydrogen type iron powder electrode and preparation method thereof

A technology of iron powder electrode and low hydrogen type, which is applied in the field of high deposition rate and low hydrogen type iron powder electrode and its preparation, can solve the problems of mechanical properties and deposition efficiency to be improved, and achieve ideal weld hardness and numerical fluctuation Small size and high deposition efficiency

Active Publication Date: 2017-05-10
PANZHIHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Obviously, high-efficiency iron powder electrodes have high deposition efficiency, which can save a lot of working hours, manpower, electricity and steel consumption, and hav

Method used

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  • High-deposition-rate and low-hydrogen type iron powder electrode and preparation method thereof
  • High-deposition-rate and low-hydrogen type iron powder electrode and preparation method thereof
  • High-deposition-rate and low-hydrogen type iron powder electrode and preparation method thereof

Examples

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Example Embodiment

[0114] The preparation method of the above-mentioned high deposition rate and low hydrogen type iron powder electrode includes the following steps:

[0115] a. Welding core treatment: Grind the prepared welding core with sandpaper to clean the surface of the welding core, make the surface of the welding core clean and smooth, align it, and weigh it;

[0116] b. Passivation treatment of ferroalloy: in the atmosphere, the iron-containing components in the coating are oxidized and passivated;

[0117] One or more iron alloys are generally added to electrode coatings, especially alkaline electrodes. The coatings contain more iron alloys. These iron alloy powders interact with the free alkali in the water glass during the wet mixing process, and the following can occur reaction:

[0118] Hydrolysis of water glass:

[0119] Na 2 SiO 3 +2H 2 O=2NaOH+H 2 SiO 3

[0120] The ferrosilicon added in the coating contains elemental silicon Si, so:

[0121] Si+2NaOH+H 2 O=Na 2 SiO 3 +2H 2 ↑

[0122] Ther...

Example Embodiment

[0134] Example 1

[0135] 1. The following only selects the most representative groups of experiments from a large number of experiments to prove that the electrode coating formula selected in the present invention has higher deposition efficiency and hardness. The specific experimental steps are as follows:

[0136] (1) Solder core treatment: The H08A solder core prepared in advance (see Table 1 for its chemical composition) is polished with sandpaper until the surface of the solder core is bright, straighten it and weigh it;

[0137] Table 1 Chemical composition of H08A welding core ( / wt%)

[0138] chemical compositionC Si MnPS NiCr Welding core H08A≤0.10≤0.03 0.30~0.55≤0.03≤0.03≤0.30≤0.20

[0139] (2) Passivation treatment of ferroalloy: natural passivation method is used to oxidize ferroalloy in the atmosphere;

[0140] (3) Preparation of water glass: in the water glass mixing pool, mix to the required concentration, and add 0.25% to 0.5% potassium permanganate according to the ...

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Abstract

The invention belongs to the technical field of welding materials and particularly relates to a high-deposition-rate and low-hydrogen type iron powder electrode and a preparation method thereof. A coating of the electrode is prepared from components in parts by weight as follows: 29-31 parts of marble, 13-15 parts of fluorite, 2-4 parts of silicon iron, 1.5-2.5 parts of titanium dioxide, 1.5-2.5 parts of wood meal, 14-16 parts of rutile, 4-6 parts of feldspar powder, 6-8 parts of quartz powder, 4-6 parts of mica, 12-14 parts of titanium powder and 39-41 parts of iron powder. The deposition efficiency of the electrode is high and reaches 134%, the hardness value of the electrode after welding is relatively large and reaches 185.8, the fluctuation of the value is relatively small, and the hardness of a weld joint after welding of the electrode is most ideal.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a high deposition rate and low hydrogen type iron powder welding rod and a preparation method thereof. Background technique [0002] Iron powder electrode is a certain amount of iron powder added to the coating to improve the welding process performance of the electrode and increase the deposition efficiency of the electrode. The outer diameter of the coating of this type of electrode is slightly thicker than that of ordinary electrodes, and it can still be welded in all positions. When the amount of iron powder added exceeds 30%, and the thickness of the coating is appropriately increased, the deposition efficiency can be greatly improved. It is usually called high-efficiency iron powder electrode, and the deposition efficiency is 130% to 160%, up to 250%. The iron powder electrode has excellent process performance, the weld seam is formed smoothly, no unde...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/40B23K35/365
CPCB23K35/0272B23K35/3053B23K35/3602B23K35/365B23K35/404
Inventor 武昭妤沈岗古庆都曾辉罗清文张旭清
Owner PANZHIHUA UNIV
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