Fluorine-base type sintered flux used for reducing sulfur and phosphorus contents of welding joint and used in submerged arc hardfacing
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A sintered flux, fluorine-alkali type technology, used in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problem of not being able to meet welding requirements well, achieve excellent high temperature slag removal performance, improve toughness and Crack resistance, beautiful effect of weld forming
Inactive Publication Date: 2012-11-28
CHINA JINGYE ENG TECH CO LTD +1
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Problems solved by technology
The welding requirements of this kind of wear-resistant surfacing welding cannot be well met by using the existing flux
Method used
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Examples
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Embodiment 1
[0015] 1. Flux composition (wt%): MgO 34, CaF 2 20, Al 2 o 3 20, SiO 2 18, MnO3, FeO 1.28, rare earth fluoride composite additive 3, Na 2 O 0.453,K 2 O 0.213, S 0.024, P 0.030.
[0016] 2. Preparation method: carry out proportioning and weighing according to the formula, then carry out dry stirring for about 20-30 minutes, after stirring evenly, add potassium-sodium mixed water glass with dry powder weight of about 18-20%, fully stir evenly, and send the stirred wet powder to Enter the granulator for granulation. After granulation, the flux is dried in a drying furnace at 250°C for about 1 hour. The dried flux is sieved, and the flux within the standard particle size range at the sieving point is sent to the sintering furnace for sintering. The sintering temperature is 850°C, and the sintering is about 1 hour. After cooling out of the furnace, it is inspected and sieved for packaging.
[0017] 3. Cooperate with the main chemical composition of deposited metal after ZY...
Embodiment 1
[0018] The main chemical composition (wt%) of the deposited metal after Example 1 cooperates with ZY-YJ101N-S overlay welding is shown in Table 1:
[0019] Table 1
[0020] C
Embodiment 2
[0022] 1. Flux composition (wt%): MgO 34, CaF 2 20, Al 2 o 3 20, SiO 2 18, MnO 3, FeO 1.29, rare earth fluoride composite additive 3, Na 2 O 0.435,K 2 O 0.218, S 0.026, P 0.031.
[0023] 2. The preparation method is the same as in Example 1.
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Abstract
The invention discloses a fluorine-base type sintered flux used for reducing sulfur and phosphorus contents of a welding joint and used in submerged arc hardfacing, relating to the flux technology. The fluorine-base type sintered flux comprises the following components in percent by weight: 30-35 percent of magnesium oxide (MgO), 16-21 percent of calcium fluoride (CaF2), 17-22 percent of aluminium oxide (Al2O3), 14-19 percent of silica (SiO2), 3-5 percent of manganese oxide (MnO), less than 3 percent of ferrous oxide (FeO), 1-3 percent of rare earth fluoride compound additive, 0.3-0.6 percent of sodium oxide (Na2O), 0.15-0.3 percent of potassium oxide (K2O), not more than 0.03 percent of sulphur (S) and not more than 0.04 percent of phosphorus (P).Through controlling the basicity range of the flux and adding the rare earth fluoride compound additive, the oxygen content, the sulfur and phosphorus contents and the impurities in the flux are reduced, and the purity of weld metal is ensured, and higher flexibility and cracking resistance are obtained by hardfacing deposited metal.
Description
technical field [0001] The invention relates to the technical field of flux, and is a fluorine-alkali type sintered flux for submerged arc wear-resistant surfacing welding, which effectively reduces the sulfur and phosphorus content of weld metal. Background technique [0002] Industries such as metallurgy, mining, machinery, building materials and coal transportation all need to use a large amount of wear-resistant materials. In order to improve the service life of the wear-resistant spare parts, a layer of hard surface material meeting the above properties is usually surfacing on its surface to improve the service life of the spare parts. Submerged arc automatic surfacing has the advantages of high degree of automation, fast deposition speed, and good forming, and has become the most widely used repair technology in the surfacing industry. Since the surfacing materials of these spare parts require high hardness and continuous surfacing, the requirements for flux are parti...
Claims
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