Ultralow-hydrogen type high-alkalinity high-toughness sintered flux

A sintered flux, high basicity technology, used in ultra-low hydrogen type high basicity and high toughness sintered flux, welding of thick-walled pressure vessels, automatic submerged arc welding of low-alloy steel, can solve serious silicon infiltration, low temperature impact The problems of poor toughness and high content of impurity elements can achieve the effect of excellent technical effect
CN112059473APending Publication Date: 2020-12-11BEIJING JINWEI WELDING MATERIAL +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING JINWEI WELDING MATERIAL
Publication Date
2020-12-11

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Abstract

The invention relates to an ultralow-hydrogen high-alkalinity high-toughness sintered flux. The sintered flux is specifically prepared from dry powder of multiple components and binder water glass, and the dry powder comprises the following components in parts by weight: 12-23 parts of MgO, 15-25 parts of CaF2, 16-26 parts of Al2O3, 10-20 parts of CaCO3, 1-8 parts of SiO2, 1-5 parts of BaCO3, 1-5parts of Li2CO3, 2-5 parts of K2O+Na2O, and 1-5 parts of silicon-manganese-iron alloy. The ultralow-hydrogen type high-alkalinity high-toughness sintered flux is prepared through the method includingthe following steps that the dry powder materials are evenly mixed according to the proportions, the water glass is added, wet mixing is conducted, then granulation is conducted, drying is conducted at the temperature of 280-380 DEG C to remove the moisture, screening is conducted, high-temperature sintering is conducted at the temperature of 750-850 DEG C, cooling and screening are conducted, andthe ultralow-hydrogen type high-alkalinity high-toughness sintered flux is obtained. The ultralow-hydrogen type high-alkalinity high-toughness sintered flux has the excellent technical effects as shown in the specification.
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Description

technical field

[0001] The invention belongs to the technical field of welding materials, and in particular relates to an ultra-low hydrogen type high-alkalinity and high-toughness sintered flux, which is mainly suitable for submerged arc automatic welding of low alloy steel, and is especially suitable for welding of thick-walled pressure vessels. Background technique

[0002] With the development of modern industry and the improvement of automation level, submerged arc automatic welding is widely used in the production of large-scale welding structures such as pipelines, ships, boilers, and thick-walled pressure vessels due to its high degree of automation, fast welding speed, and stable weld performance. be widely used. For example, thick-walled pressure vessels such as hydrogenation reactors in the petroleum refining and chemical industry work under high temperature, high pressure, and hydrogen exposure for a long time. Therefore, in addition to high strength and high tou...

Claims

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