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Low hydrogen type iron powder welding rod and preparation method thereof

A technology of iron powder electrode and low-hydrogen type, applied in the field of low-hydrogen iron powder electrode and its preparation, can solve the problems of large welding surface defects, not fine and beautiful corrugations, poor process operability, etc., and achieve neat weld seam , good effect of weld corrugation

Active Publication Date: 2019-02-22
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] At present, the domestic production of low-hydrogen electrodes, while ensuring high mechanical properties, the process operability is not good, the corrugation formed by the weld is not delicate and beautiful, and at the same time, the welding slag after welding of the electrodes is not easy to fall off, resulting in large defects on the welding surface

Method used

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  • Low hydrogen type iron powder welding rod and preparation method thereof
  • Low hydrogen type iron powder welding rod and preparation method thereof
  • Low hydrogen type iron powder welding rod and preparation method thereof

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preparation example Construction

[0078] The invention also provides a preparation method of the low-hydrogen type iron powder welding rod.

[0079] The preparation method of above-mentioned low hydrogen type iron powder welding rod, comprises the following steps:

[0080] 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;

[0081] b. Modulation of water glass: add 5wt% methyl acrylate to ordinary water glass with 45 Baume degrees and modulus M=2.9, stir, and set aside; when configuring water glass, clean tap water is required, and grease, dirt, etc. should be avoided. Mixed with substances, etc., affecting the quality of water glass;

[0082] c. Ingredients: weigh according to the ingredients of the above-mentioned coating, and wait for use; remember that because the weight value weighed by itself is small, there may be experimental errors, so it must be weighed a...

Embodiment 1

[0092] 1, the following only select the most representative several groups of experiments in a large number of experiments, to prove that the electrode coating formula selected by the present invention has better slag removal performance and appearance, the specific experimental steps are as follows:

[0093] (1) Welding core treatment: Surface treatment is performed on the pre-prepared H08A welding core (see Table 1 for its chemical composition), to remove oil, dust, rust, etc. on the surface, straighten it, and weigh it ;

[0094] Table 1H08A Weld Core Chemical Composition ( / wt%)

[0095] 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

[0096] (2) Modulation of water glass: in the water glass blending tank, adjust to the required concentration, and add 0.25% to 0.5% potassium permanganate by the weight of the liquid water glass, stir evenly and get ready ...

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Abstract

The invention belongs to the technical field of welding materials, and particularly involves a low-hydrogen iron powder electrode and preparing method. The coating of low-hydrogen iron powder electrode is made up of following parts by weight: 47 to 49 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 powder, 14 to 16 parts of rutile, 4 to 6 parts of feldspar powder, 6 to 8 parts of silica flour, 4 to 6 parts of mica powder, 12 to 14 parts of titanium valve, and 19 to 21 parts of iron powder. The low-hydrogen iron powder electrode has the advantage of overall good appearance of weld seam, parallel sideline and knitting well with mother metal. Weld seam is neat for ripple, and the height of weld seam is close to. The surface of weld seam does not have the disadvantage of pore-free, crackle, slag inclusion, undercut, and overlap. The welding slag after welding rod is easy to fall off.

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] With the needs of social development and economic construction, steel is still an irreplaceable important raw material for human beings, and an important indicator to measure a country's comprehensive national strength and industrial level. Welding is the main connection method of steel materials. Iron powder electrodes use the industrial waste iron powder produced in the production process of many steel factories to add to the electrode coating to improve the deposition rate of the electrodes. [0003] Good weld formation requires smooth surface, fine and beautiful corrugation, and correct geometry and size of the weld. The weld seam should smoothly transition to the base metal, the reinforcement should meet the standard, and there should be no defec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/365B23K35/40
CPCB23K35/3601B23K35/365B23K35/404
Inventor 武昭妤赖奇廖先杰沈岗
Owner PANZHIHUA UNIV
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