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

A processing technology and special-shaped steel technology, which is applied in the field of steel rolling processing, can solve the problems of being easily corroded by acidic and alkaline objects, increasing the difficulty of pass design and production, and affecting the service life of special-shaped steel pipes, etc. Controllable quality, enhanced high-temperature oxidation resistance, anti-rust and reasonable heat effect

Inactive Publication Date: 2021-11-02
常州市方正型钢有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] S1: Prepare the substrate

[0049] (1) Add molten iron and scrap steel to the converter for compound blowing, tap steel at 1580°C, blow argon and stir throughout the tapping process; add carbon powder, cobalt powder, molybdenum powder, high-carbon ferromanganese, high-carbon ferrochrome, high-carbon The ferro-tungsten and vanadium-iron alloy powders are then hoisted to the ladle refining furnace for argon blowing and stirring, the pH is adjusted to 5.0, and then the temperature of the molten steel is heated to 1450°C by a graphite electrode, and then an insulating agent is added. The chemical composition of the molten steel is: carbon: 0.2% , silicon: 2%, tungsten: 8.2%, molybdenum: 2%, chromium: 45%, cobalt: 0.1%, manganese: 0.5%, vanadium: 0.2%, the rest is iron, poured into billets, and put the billets into In the cleaning solution, under the action of ultrasound, wash at 60°C for 30 minutes, take it out and dry it; after drying, heat it in the furnace to 1000°C, and...

Embodiment 2

[0060] S1: Prepare the substrate

[0061] (1) Add molten iron and scrap steel to the converter for compound blowing, tap steel at 1610°C, blow argon and stir throughout the tapping process; add carbon powder, cobalt powder, molybdenum powder, high-carbon ferromanganese, high-carbon ferrochrome, high-carbon The ferro-tungsten and vanadium-iron alloy powders are then hoisted to the ladle refining furnace for argon blowing and stirring, and the pH is adjusted to 6.2. After that, the temperature of the molten steel is heated to 1480°C by graphite electrodes, and then an insulating agent is added. The chemical composition of the molten steel is: carbon: 0.5% , silicon: 2.4%, tungsten: 8.6%, molybdenum: 4%, chromium: 40%, cobalt: 0.15%, manganese: 0.8%, vanadium: 0.4%, and the rest is iron. In the cleaning solution, under the action of ultrasound, wash at 80°C for 20 minutes, take it out and dry it; after drying, heat it in the furnace to 1100°C, and after cooling out of the furnace...

Embodiment 3

[0072] S1: Prepare the substrate

[0073](1) Add molten iron and scrap steel to the converter for compound blowing, tap steel at 1620°C, blow argon and stir throughout the tapping process; add carbon powder, cobalt powder, molybdenum powder, high-carbon ferromanganese, high-carbon ferrochrome, high-carbon Iron-tungsten and iron-vanadium alloy powders are then hoisted to the ladle refining furnace for argon blowing and stirring, and the pH is adjusted to 7.0. Afterwards, the temperature of the molten steel is heated to 1500°C by a graphite electrode, and then an insulating agent is added. The chemical composition of the molten steel is: carbon: 1% , silicon: 3%, tungsten: 10%, molybdenum: 6%, chromium: 20%, cobalt: 0.2%, manganese: 1%, vanadium: 0.6%, the rest is iron, poured into billets, and put the billets into In the cleaning solution, under the action of ultrasound, wash at 100°C for 10 minutes, take it out and dry it; after drying, heat it in the furnace to 1200°C, and af...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D133/04C09D5/08C09D7/61C09D7/62C09D7/65C09D183/04C09D161/06C22C33/04C22C38/02C22C38/44C22C38/52C22C38/46B21C37/00
CPCC09D163/00C09D5/08C09D7/61C09D7/62C09D7/65C09D7/70C09D183/04C09D161/06C09D5/18C22C33/04C22C38/02C22C38/44C22C38/52C22C38/46B21C37/00C08K2003/2241C08K2003/327C08L2201/08C08L33/04C08L1/284C08K3/042C08K3/22C08K3/32C08L61/06C08K9/10C08K7/20C08L83/04
Inventor 吴小虎王啸桐吴志超
Owner 常州市方正型钢有限公司
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