Titanium-molybdenum-nickel alloy composite board and manufacturing method thereof

Abstract

The invention discloses a titanium-molybdenum-nickel alloy composite board which is used for manufacturing a power plant chimney. The titanium-molybdenum-nickel alloy composite board comprises a titanium-molybdenum-nickel alloy board and a substrate steel board; the titanium-molybdenum-nickel alloy board is made of titanium-molybdenum-nickel alloy and prepared from, by weight, 0.2%-0.4% of molybdenum, 0.6%-0.9% of nickel, 0.08% of carbon, 0.15% of silicon, 0-0.015% of hydrogen, 0-0.2% of oxygen, 0.3% of ferrum and the balance titanium. According to the titanium-molybdenum-nickel alloy composite board, the structures of the titanium-molybdenum-nickel alloy board and the substrate steel board are more reasonable, the cost performance of the metal composite board for a power plant is improved, the life of the metal composite board is prolonged, the usage temperature is increased, the unit capacity is increased, the design requirements are completely met, and the economical effeciency is high. The invention further provides a manufacturing method of the composite board.

Description

Technical field [0001] The invention relates to the field of steel chimneys, in particular to a titanium-molybdenum-nickel alloy composite plate and a manufacturing method thereof. Background technique [0002] Generally speaking, the current larger power plant smoke and dust desulfurization is divided into GGH (GasGasHeater) and wet desulfurization without GGH. The flue gas temperature of the former is about 80℃, and it will not immediately form corrosive droplets when cold, while the latter The flue gas temperature is about 40-50℃. When it is cold, it will form corrosive white mist droplets (containing fluoride, chloride, SO2 and S03, etc.) and the water vapor in the air will condense into highly corrosive hydrogen fluoride Acid, hydrochloric acid, sulfuric acid, etc.), so the flue gas environment after wet desulfurization, low temperature and high humidity will further deteriorate the corrosive environment of the chimney. Summary of the invention [0003] In order to solve t...

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Problems solved by technology

[0002] Generally speaking, the flue dust desulfurization of larger power plants is divided into wet desulfurization with GGH (GasGasHeater) and wet desulfurization without GGH. The temperature of the flue gas is about 40 to 50 ° C. When it is cold, it will form the corrosive white mist droplets (containing fluoride, chloride, SO2 and S03, etc., and the water vapor in the air will condense into highly corrosive hydrofluorine. acid, hydrochloric acid and sulfuric acid, etc.), so the flue gas environment after wet desulfurization, low temperature and high humidity will further deteriorate the corrosion environment of the chimney