Rare earth-containing ilmenite type welding rod and preparation method thereof

A technology of rare earth titanium and welding rods, applied in welding equipment, manufacturing tools, welding media, etc., can solve the problems of easy slag inclusion, poor impact toughness, incomplete penetration, etc., to improve comprehensive performance, increase tensile strength and Effect of impact toughness and homogenization of austenite grains

Pending Publication Date: 2022-01-14
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, although the J422 electrode can be used in both AC and DC welding machines, it is easy to cause arc deviation when using DC or inverter, and improper current selection is likely to cause defects such as slag inclusions and incomplete penetration. It is generally used for welding ordinary steel structures. No special requirements for strength, especially poor impact toughness

Method used

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  • Rare earth-containing ilmenite type welding rod and preparation method thereof
  • Rare earth-containing ilmenite type welding rod and preparation method thereof
  • Rare earth-containing ilmenite type welding rod and preparation method thereof

Examples

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Effect test

preparation example Construction

[0027] For the preparation process of reduced ilmenite, what this application adopts is, after the ilmenite is screened earlier, add composite additives (i.e. analytically pure sodium chloride and sodium tetraborate) and binding agent (i.e. industrial pure silicic acid Sodium) after regrinding and moistening, and prepare composite pellets according to the appropriate pelletizing process parameters. After the pellets are pre-oxidized, add an appropriate amount of coke and fill them in a tube furnace for reduction. The reduction product is passed through an inert gas After cooling, the reduced pellets, residual carbon and ash are separated, and the reduced pellets are broken into corresponding particles to obtain reduced ilmenite for welding rods. Specifically include the following steps:

[0028] 1. Preparation of composite pellets After sieving, the ilmenite ore is screened, and 40 mesh ore is selected for regrinding. The particle size is ground to less than 140 mesh, which ac...

Embodiment 1

[0051] The welding core is H08A, and the weight percentage of the coating is shown in the following table 1 to make 9 welding rods:

[0052] Table 1 Specific experimental formula design (wt.%)

[0053]

[0054] When preparing the welding rod, grind the Φ3.2H08A welding core with sandpaper to remove rust, straighten it, and set it aside. Mix the various medicinal powders weighed above together, stir thoroughly, and there must be no lumps or granules. Gradually add appropriate amount of water glass and mix gently until a "dough" can be formed. Knead the wet powder along the welding core bit by bit, pay attention to the force evenly, roll it gently on the glass after kneading, so that the coating is even, and leave about 20mm of no coating at one end of the welding rod end, the non-clamping end leaves the solder core, do not form a header. The twisted electrodes are dried in the air for 24 hours, and then placed in an oven for 2 hours at 180°C to 220°C.

[0055] The compar...

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Abstract

The invention discloses a rare earth-containing ilmenite type welding rod and a preparation method thereof in the field of welding. The welding rod comprises a core wire and a coating coating wrapping the core wire, the coating coating comprises the following raw materials of, in percentage by weight, 12%-15% of artificial rutile, 10%-15% of titanium dioxide, 20%-30% of reduced ilmenite, 4%-5% of medium carbon ferromanganese, 8%-10% of feldspar, 5%-8% of mica, 5-7% of marble, 4-6% of sepiolite, 3-4% of wood flour, 6-8% of lanthanum oxide and 2-4% of cerium oxide. The main components in the coating coating of the welding rod are reduced ilmenite, artificial rutile and titanium dioxide, the arc striking effect is improved by adding a proper amount of rare earth oxide, non-metallic inclusions in a welding seam are promoted to be distributed in a dispersed mode, the austenite grain size of the welding seam is reduced, austenite grains are homogenized, the tensile strength and impact toughness of the welding seam are improved, and therefore, the comprehensive performance of a welding joint is improved.

Description

technical field [0001] The invention relates to the field of welding, in particular to a rare earth-containing ilmenite-type electrode and a preparation method thereof. Background technique [0002] The development of welding technology is basically the development of welding materials and welding methods, which complement each other, promote each other, and restrict each other. With the rapid development of the national economy, the output of welding electrodes in China has also increased rapidly. The price of ordinary products is relatively low, the quality is relatively stable, and the market competition is fierce, which can generally meet the needs of economic construction and engineering construction and welding in various industries, but a few high-end products Still need to import. [0003] At present, the commonly used J422 electrode in my country is a low-carbon steel electrode with a strength grade of 420MPa. Its weld metal has good plasticity, toughness, and exce...

Claims

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Application Information

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IPC IPC(8): B23K35/02B23K35/36B23K35/362B23K35/40
CPCB23K35/02B23K35/0261B23K35/0272B23K35/36B23K35/3601B23K35/362B23K35/40B23K35/404
Inventor 王能为
Owner PANZHIHUA UNIV
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