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Ilmenite type welding electrode containing lanthanum and cerium oxide

A technology of cerium oxide and ilmenite, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of poor crack resistance of welding rods, and achieve the effect of cost improvement and excellent welding process performance

Active Publication Date: 2015-05-20
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an ilmenite-type welding electrode containing lanthanum and cerium oxide to solve the problem of poor crack resistance of E4301 (J423) electrodes

Method used

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  • Ilmenite type welding electrode containing lanthanum and cerium oxide
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  • Ilmenite type welding electrode containing lanthanum and cerium oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Taking the electrode formula in Table 1 as the basic formula, the weight ratio of lanthanum through the electrode coating is 0.5, the weight ratio of cerium oxide is 0.2, and the weight ratio of medium carbon ferromanganese is 10.4 (the unit can be g or Kg, etc., and can be expanded or expanded at the same time according to the number of electrodes produced. When compared with the mechanical properties of the deposited metal in the control example, the new electrode is not sensitive to oil stains and rust on the weldment, has little spatter, and is better in manufacturability; the slag has good fluidity, easy slag removal, and welding The seam is formed beautifully, and its mechanical properties, especially the impact energy at -20°C and the elongation after fracture, have been greatly improved. The results are shown in Table 2:

[0017] Table 2 Comparison of Mechanical Properties of Deposited Metals between Example 1 of the present invention and Comparative Example

[...

Embodiment 2

[0020] Taking the electrode formula in Table 1 as the basic formula, when the weight ratio of lanthanum to the electrode coating is 0.5, the weight ratio of cerium oxide is 0.3, and the weight ratio of medium carbon ferromanganese is 9.8, the mechanical properties of the deposited metal are compared with those of the control example. The new electrode It is still insensitive to oil stains and rust on the weldment, with little spatter and good manufacturability; the slag has good fluidity, easy slag removal, beautiful weld shape, and its mechanical properties, especially the impact absorption energy and The elongation after breaking has been greatly improved, and the results are shown in Table 3:

[0021] Table 3 Comparison of mechanical properties of deposited metal between Example 2 of the present invention and comparative example

[0022]

Embodiment 3

[0024] Taking the electrode formula in Table 1 as the basic formula, when the weight ratio of lanthanum to the electrode coating is 0.4, the weight ratio of cerium oxide is 0.1, and the weight ratio of medium carbon ferromanganese is 11.3, the mechanical properties of the deposited metal are compared with those of the control example. The new electrode It is still insensitive to oil stains and rust on the weldment, with little spatter and good manufacturability; the fluidity of slag is good, the slag is easy to remove, and the weld shape is beautiful. Moreover, its mechanical properties, especially the impact absorption energy at -20°C, are relatively good. Significantly improved, the results are shown in Table 4:

[0025] Table 4 Comparison of Mechanical Properties of Deposited Metals between Example 3 of the present invention and Comparative Example

[0026]

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PUM

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Abstract

The invention discloses an ilmenite type welding electrode containing lanthanum and cerium oxide. The ilmenite type welding electrode comprises a core wire and a covering which is coated on the core wire in a pressed mode. The ilmenite type welding electrode is characterized in that powder materials are mixed evenly to constitute the covering, and the covering comprises, by weight percentage, 9.8-11.5% of mid-carbon ferromanganese, 8-9% of marble, 6-7% of rutile, 45-48% of reduced ilmenite, 7-8% of feldspar, 4.5-5% of mica, 5.5-6.5% of white mud, 1.5-2% of sepiolite, 1.5-2% of sericite, 3-4% of carclazyte, 1-2% of bamboo powder, 1-2% of microcrystalline cellulose, 0.4-0.5% of the lanthanum and 0.1-0.3% of the cerium oxide. The powder materials are mixed evenly and are coated on the H08A core wire in the pressed mode through a screw type pressing coating machine to constitute the ilmenite type welding electrode, wherein potassium sodium water glass serves as agglomerant, and the diameter of the H08A core wire is 4mm. The ilmenite type welding electrode has the advantages that compared with an existing E4301 type core wire, the core wire keeps excellent welding technology performance of the original core wire, ballistic work is improved by 50-54.4%, ductility is improved by 20-25.1%, strength of extension is improved by 3.3-6.3%, and yield strength is improved by 6.4-9.2%.

Description

technical field [0001] The invention relates to the technical field of welding materials, in particular to an ilmenite-type welding electrode containing lanthanum and cerium oxide. Background technique [0002] The coating type of E4301 electrode is ilmenite type, and the welding slag is acidic. This kind of electrode has stable arc during welding, beautiful weld shape, good slag coverage, high deposition efficiency, and is not sensitive to rust and oil stains in the weld. It is mainly used for welding important carbon steel structures, such as vehicles. , building structures and heavy machinery. However, because the E4301 electrode uses an acidic slag system, it is difficult to effectively remove the sulfur and phosphorus impurities in the weld. In addition, the hydrogen in the organic bamboo powder in the coating formula is easy to dissolve into the weld, which increases the hydrogen of the weld, reduces the impact energy, and reduces the impact resistance. Poor cracking...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/365
Inventor 范希营郭永环刘海宽张亮
Owner XUZHOU NORMAL UNIVERSITY
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