Rust-proof heat-resistant deformed steel and processing technology thereof

Abstract

The invention provides anti-rust heat-resistant deformed steel and a processing technology thereof. The deformed steel comprises a base material, a heat-resistant layer and an anti-rust layer; the base material comprises the following chemical components in percentage by mass: 0.2 to 1 percent of carbon, 2 to 3 percent of silicon, 8.2 to 10 percent of tungsten, 2 to 6 percent of molybdenum, 20 to 45 percent of chromium, 0.1 to 0.2 percent of cobalt, 0.5 to 1 percent of manganese, 0.2 to 0.6 percent of vanadium and the balance of iron; the processing technology of the base material comprises the steps of cleaning, dephosphorization, rolling, controlled cooling and straightening; specifically, a steel billet is placed in a cleaning solution, subjected to ultrasonic cleaning and drying and then heated to 1000-1200 DEG C in a furnace, the steel billet is discharged out of the furnace, cooled and then descaled through high-pressure water of 15-25 MPa, the steel billet is sent to a two-roller reversible rolling mill to be roughly rolled, then a universal continuous rolling unit is adopted for continuous rolling, controlled cooling and straightening, and the base material is obtained; the base material is subjected to sand blasting treatment, the surface of the base material is coated with the epoxy micaceous iron oxide intermediate paint, and then the epoxy micaceous iron oxide intermediate paint is coated with the anti-rust coating to serve as an anti-rust layer; and the antirust layer is coated with a heat-resistant coating as a heat-resistant layer.

Description

technical field [0001] The invention relates to the field of steel rolling processing, in particular to a rust-proof and heat-resistant special-shaped steel and a processing technology thereof. Background technique [0002] Section steel is one of the four major types of steel (type, line, plate, pipe). According to the cross-sectional shape, section steel can be divided into simple section section steel and complex and special-shaped section section steel (special-shaped steel), such as "Wang" character middle beam steel, " C" type steel, "H" type steel, "E" type steel, "Z" type steel, "SQ" type steel, etc. [0003] Because of the singleness and particularity of use, the precision requirements for special-shaped steel are high, so the ability of equipment is required to be higher; because of the complex cross-sectional shape, many special-shaped steels are special for specific occasions, which increases the pass design and production. Therefore, the production cost of spec...

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Problems solved by technology

[0003] Because of the singleness and particularity of use, the precision requirements for special-shaped steel are high, so the ability of equipment is required to be higher; because of the complex cross-sectional shape, many special-shaped steels are special for specific occasions, which increases the pass design and production. Difficulty, so the production cost of special-shaped steel is higher than that of simple cross-section steel

[0004] With the development of the national economy, more and more shaped steels related to the national economy and the people's livelihood, such as large H-shaped steels, high-speed rails, etc., have increased demand, so there are higher requirements for the dimensional accuracy control of special-shaped steels and the detailed treatment of cross-sectional shapes; in In a complex environment, special-shaped steel needs to have the characteristics of high temperature resistance, corrosion resistance, high strength, long service life, and excellent comprehensive performance; however, the materials currently used to manufacture special-shaped steel have low strength and limited toughness, and the existing special-shaped After long-term use of steel, it is easy to cause rust on special-shaped steel pipes, and it is easily corroded by acidic and alkaline objects, which affects the service life of special-shaped steel pipes

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