Inverse proportion formula high alkalinity slag-based nickel-based electrode for lng structure and marine 9-nickel steel welding

Abstract

Provided are an LNG structure and an inverse proportion formula high-alkalinity slag-system nickel-based welding rod for welding marine 9 nickel steel. The inverse proportion formula high-alkalinity slag-system nickel-based welding rod for welding the marine 9 nickel steel comprises a welding core and a coating arranged on the surface of the welding core in a wrapping mode, the content of chemical components and weight percentage of the welding core comprises 0.02% or less of C, 0.01% or less of S, 0.01% or less of P, 99.0% or more of Ni, 0.50% or less of remaining elements, and the total amount of all the components is 100%; the components and the weight percentage of power materials in the coating comprises 5-10% of marble, 20-30% of fluorite, 5-11% of strontium carbonate, 24-30% of chromium metal, 4-10% of manganese metal, 8-13% of molybdenum, 1-5% of ferrotungsten, 3-8% of ferroniobium, 0.5-1.5% of organic matter, 0.5-1.5% of soda ash, 2-4% of silicon iron, 1-3% of ferrotitanium, and the total amount of all the components is 100%; the the power materials of all the components are evenly mixed with water glass which accounts for 16%-35% of the total mass of the coating according to proportion, the mixture is conveyed to a press coating machine and arranged on the welding core in the wrapping mode, and the LNG structure and inverse proportion formula high-alkalinity slag-system nickel-based welding rod for welding the marine 9 nickel steel is obtained through low-temperature baking and high-temperature baking. According to the LNG structure and the inverse proportion formula high-alkalinity slag-system nickel-based welding rod for welding the marine 9 nickel steel, the comprehensive mechanical property can be achieved at the temperature of -196 DEG C, the welding technological property is achieved simultaneously, and all-position welding can be conducted.

Description

technical field [0001] The invention relates to a nickel-based welding material, in particular to an ENiCrFe-9 nickel-based welding rod for welding a new high-alkalinity slag-based LNG structure with an inverse proportion formula and marine 9-nickel steel (also known as 9% Ni steel). Background technique [0002] With the acceleration of global industrialization and informatization, the demand for energy in countries around the world is increasing rapidly. At the same time, problems such as energy shortage and coal burning pollution, which seriously restrict the sustainable development of the economy, are also increasingly exposed. As a high-quality clean fuel and an important chemical raw material, natural gas has become one of the three pillar energy sources in the world today. In the past 10 years, the status and role of natural gas in social development have become increasingly prominent, and global natural gas production and consumption have shown a steady growth trend....

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Problems solved by technology

[0004] With the adjustment of my country's energy strategy, the LNG industry has maintained a momentum of rapid development in my country. The development of the LNG industry has greatly increased the demand for 9Ni steel and 9Ni steel welding materials. It is far from satisfying the development of 9Ni steel welding technology.

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