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 low-hydrogen iron powder electrode and its preparation, can solve the problems of low price of electrode, low comprehensive performance of electrode, and poor process operability, etc., so as to improve utilization rate and Welding efficiency, good weld appearance and good slag removal

Active Publication Date: 2017-02-22
PANZHIHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The publication number is "CN1657224A", and the title of the invention is "ultra-low hydrogen type high-efficiency iron powder welding rod for low-alloy high-strength steel". It discloses a spherical iron powder. The production cost of the iron powder is relatively high, so the price of the electrode produced not economical
[0004] At present, many low-hydrogen electrodes produced in China, while ensuring high mechanical properties, have poor process operability and severe spatter during welding, resulting in low overall performance of the electrodes.

Method used

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preparation example Construction

[0122] The invention also provides a preparation method of the low-hydrogen type iron powder welding rod.

[0123] The preparation method of above-mentioned a kind of low-hydrogen type iron powder welding rod, comprises the following steps:

[0124] a. Welding core treatment: Grind the prepared welding core with sandpaper, clean the surface of the welding core, make the surface of the welding core clean and smooth, straighten it, and weigh it;

[0125] b. Passivation treatment of iron alloy: in the atmospheric environment, the iron-containing components in the coating are oxidized and passivated;

[0126] Generally, one or more kinds of iron alloys are added to the electrode coating, especially the basic electrode, which contains more iron alloys. These iron alloy powders will interact with the free alkali in the water glass during the wet mixing process, and the following can occur reaction:

[0127] Hydrolysis of water glass:

[0128] Na 2 SiO 3 +2H 2 O=2NaOH+H 2 SiO ...

Embodiment 1

[0143] 1, the most representative several groups of experiments in a large number of experiments are only selected below to prove that the electrode coating formula selected by the present invention has better welding performance and process performance, and the specific experimental steps are as follows:

[0144] (1) Welding core treatment: Grind the pre-prepared H08A welding core (see Table 1 for its chemical composition) with sandpaper until the surface of the welding core is bright, straighten it, and weigh it;

[0145] Table 1H08A Weld Core Chemical Composition ( / wt%)

[0146] chemical composition C Si mn P S Ni Cr Solder core H08A ≤0.10 ≤0.03 0.30～0.55 ≤0.03 ≤0.03 ≤0.30 ≤0.20

[0147] (2) Passivation treatment of ferroalloys: the natural passivation method is adopted to oxidize ferroalloys in the atmosphere;

[0148] (3) Modulation of water glass: add 5% methyl acrylate to the common water glass of 45 Baume degrees and modulus M=2.9 a...

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Abstract

The invention belongs to the technical field of welding materials, and specifically relates to a low-hydrogen type iron-powder electrode and a preparation method thereof. The low-hydrogen type iron-powder electrode is characterized in that a coating is composed of the following components in parts by weight: 29 to 31 parts of marble, 13 to 15 parts of fluorite, 2 to 4 parts of ferrosilicon, 1.5 to 2.5 parts of titanium dioxide, 1.5 to 2.5 parts of wood meal, 14 to 16 parts of rutile, 4 to 6 parts of feldspar powder, 6 to 8 parts of quartz powder, 4 to 6 parts of mica powder, 12 to 14 parts of titanium powder, and 19 to 21 parts of iron powder. The low-hydrogen type iron-powder electrode has the best welding performance and processing property; a welding seam is nice in looking and does not have any obvious welding defect on the surface, and the welding seam is flat; the slag removing performance is high; obvious thick and big columnar crystals are generated at the weld joint structure and the welding seam, so that the welding requirement is met; a base material is combined well with the welding seam, and the structure transition is obvious; the heat affected area structure is close to the theory; the hardness of the low-hydrogen type iron-powder electrode is high; the utilization rate and the welding efficiency of the electrode can be improved.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a low-hydrogen type iron powder welding rod and a preparation method thereof. Background technique [0002] There are many ways to improve welding efficiency, one of which is to improve the deposition efficiency of weld metal. Domestic researchers for many welding materials are developing and applying high-efficiency iron powder electrodes. Appropriately increasing the content of iron powder in the electrode coating and adjusting other coating components can effectively increase the amount of deposited metal during welding, accelerate the formation of the weld, improve the stability of the arc, reduce spatter, and increase welding productivity. [0003] The publication number is "CN1657224A", and the title of the invention is "ultra-low hydrogen type high-efficiency iron powder welding rod for low-alloy high-strength steel". It discloses a spherical iron po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/365B23K35/40
CPCB23K35/365B23K35/40
Inventor 武昭妤廖先杰赖奇张旭清
Owner PANZHIHUA UNIV
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