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High-toughness and low-hydrogen type sintered flux for ocean engineering and preparation method thereof

A technology of sintering flux and ocean engineering, applied in welding equipment, metal processing equipment, welding medium, etc., to achieve the effect of improving purity, reducing oxygen content, and good crack resistance

Active Publication Date: 2017-04-05
WUHAN TEMO WELDING CONSUMABLES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, only a few domestic manufacturers can provide very few welding materials so far, and there is a big gap with foreign welding materials.

Method used

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  • High-toughness and low-hydrogen type sintered flux for ocean engineering and preparation method thereof
  • High-toughness and low-hydrogen type sintered flux for ocean engineering and preparation method thereof
  • High-toughness and low-hydrogen type sintered flux for ocean engineering and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment provides a high-toughness low-hydrogen type sintered flux for marine engineering, which is composed of the following components by weight percentage: MgO: 21%, CaF 2 : 28%, Al 2 o 3 : 18%, TiO 2 : 5%, SiO 2 : 18%, CaO: 4%, Na 3 AIF 6 : 2%, MnO: 2%, S≤0.015%, P≤0.025%, and the balance is unavoidable impurities.

[0032] The preparation method of the sintered flux: After the required raw materials are re-inspected and qualified, they are sieved and weighed according to the formula, and then put into a dry mixer for dry mixing, and the powder after mixing is put into a wet mixer. Add water glass with 20% powder quality for wet stirring, fully stir evenly, send the stirred raw material to the granulator for granulation, and send the granulated flux to the drying furnace after drying with hot air. Dry at a temperature of ℃, remove moisture and sieve, control the particle size of 10-60 mesh flux and send it to the sintering furnace for sintering. The sin...

Embodiment 2

[0036] This embodiment provides a high-toughness low-hydrogen type sintered flux for marine engineering, which is composed of the following components by weight percentage: MgO: 18%, CaF 2 : 30%, Al 2 o 3 : 18%, TiO 2 : 1%, SiO 2 : 18%, CaO: 6%, Na 3 AIF 6 : 2%, MnO: 6%, S≤0.015%, P≤0.025%, and the balance is unavoidable impurities.

[0037]The preparation method of the sintered flux: After the required raw materials are re-inspected and qualified, they are sieved and weighed according to the formula, and then put into a dry mixer for dry mixing, and the powder after mixing is put into a wet mixer. Add water glass with 20% powder quality for wet stirring, fully stir evenly, send the stirred raw material to the granulator for granulation, and send the granulated flux to the drying furnace after drying with hot air. Dry at a temperature of ℃, remove moisture and sieve, control the particle size of 10-60 mesh flux and send it to the sintering furnace for sintering. The sint...

Embodiment 3

[0041] This embodiment provides a high-toughness low-hydrogen type sintered flux for marine engineering, which is composed of the following components by weight percentage: MgO: 22%, CaF 2 : 28%, Al 2 o 3 : 19%, TiO 2 : 1%, SiO 2 : 22%, CaO: 3%, Na 3 AIF 6 : 2%, MnO: 2%, S≤0.015%, P≤0.025%, and the balance is unavoidable impurities.

[0042] The preparation method of the sintered flux: After the required raw materials are re-inspected and qualified, they are sieved and weighed according to the formula, and then put into a dry mixer for dry mixing, and the evenly stirred powder is put into a wet mixer. Add water glass with 20% powder quality for wet stirring, fully stir evenly, send the stirred raw material to the granulator for granulation, and send the granulated flux to the drying furnace after drying with hot air. Dry at a temperature of ℃, remove moisture and sieve, control the particle size of 10-60 mesh flux and send it to the sintering furnace for sintering. The s...

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Abstract

The invention provides high tenacity and low hydrogen type agglomerated flux for ocean engineering. The high tenacity and low hydrogen type agglomerated flux is composed of, by weight, 18%-23% of MgO, 28%-32% of CaF2, 18%-22% of Al2O3, 1%-5% of TiO2, 18%-22% of SiO2, 3%-7% of CaO, 2%-5% of Na3AIF6, 2%-6% of MnO, 0-0.015% of S and 0-0.025% of P. By means of the high tenacity and low hydrogen type agglomerated flux, weld metal has good welding process properties such as sediment separation and pore resistance and a good anti-cracking property; the Charpy impact energy is relatively high at the temperature of -40 DEG C and the content of diffusible hydrogen meets the requirement of ultra-low-hydrogen.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a high-toughness and low-hydrogen type sintered flux for ocean engineering and a preparation method thereof, which is suitable for a 460MPa grade steel submerged-arc matching welding process for ocean engineering. Background technique [0002] There are various types of steel used in marine engineering, and the strength covers a large span. For each strength steel plate, well-known foreign welding consumable manufacturers have a relatively complete series of welding consumables. However, only a few domestic manufacturers can provide very few welding materials so far, and there is a big gap with foreign welding materials. [0003] Therefore, in view of the large gap between the existing technology and foreign welding consumables, it is urgent to carry out research on the development and engineering application of 460MPa welding consumables for marine engineer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/362B23K35/40
CPCB23K35/362B23K35/40
Inventor 刘东刘玉双祝海超卢伟郑成概王文元
Owner WUHAN TEMO WELDING CONSUMABLES CO LTD
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