Sulphuric acid dew point corrosion resisting steel and method for producing same

A dew point corrosion and sulfuric acid resistance technology, applied in metal rolling, electric furnace, furnace, etc., can solve the problems of no successful experience, high cost, low cost, etc.
CN101736202AInactive Publication Date: 2010-06-16GUANGZHOU PEARL RIVER STEEL & IRON
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
GUANGZHOU PEARL RIVER STEEL & IRON
Publication Date
2010-06-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses sulphuric acid dew point corrosion resisting steel and a method for producing the same by continuously casting and rolling a thin steel billet with an electric furnace. The molten steel comprises the following chemical components by weight percent: 0.03-0.08 percent of C, 0.10-0.45 percent of Si, 0.40-1.0 percent of Mn, 0.025 percent of P or less, 0.035 percent of S or less, 0.15-0.50 percent of Cu, 0.40-1.0 percent of Cr, 0.02-0.15 percent of Sb, 0.04-0.30 percent of Ni and 0.01-0.05 percent of Ti and also comprises 100ppm of N or less. The thin steel billet is continuously cast at the speed of 3.5-5.5m / min, and the cast thin steel billet is placed in the electric furnace of 900-1050 DEG C, soaked at 1100-1200 DEG C, rolled at 1040-1120 DEG C, finally rolled at 850-920 DEG C and winded at 550-650 DEG C. The Cu-Cr-Sb composite micro-alloyed sulphuric acid dew point corrosion resisting steel having good mechanical performance, welding performance and corrosion resisting performance can be produced by continuously casting and rolling the thin steel billet with the electric furnace.
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Description

technical field

[0001] The invention belongs to the technical field of production of sulfuric acid dew point corrosion resistant steel, in particular relates to a sulfuric acid dew point corrosion resistant steel and a preparation method thereof. Background technique

[0002] 3.1 Application fields and development significance of acid-resistant steel

[0003] Sulfuric acid dew point corrosion resistant steel is a kind of steel resistant to both sulfuric acid dew point corrosion and atmospheric corrosion. Heat exchangers for ovens, air preheaters for low-temperature parts of boilers, economizers, flues, chimneys, and desulfurization devices.

[0004] Sulfuric acid dew point corrosion refers to various forms of sulfur oxides contained in boiler flue gas that uses higher sulfur content fuels. Condensation on parts, causing sulfuric acid dew point corrosion.

[0005] As the global energy becomes increasingly tense, along with the massive mining and use of fossil fuels such as...

Claims

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