Hot rolling weather-resistant steel belt and flexible production method thereof

A technology of flexible manufacturing and weathering steel, applied in the field of metallurgy, can solve the problems of production organization and waste of resources, frequent changes of smelting control, and difficulties in production organization, and achieve the effects of saving construction costs, shortening the construction period, and easy welding

Inactive Publication Date: 2020-09-29
TANGSHAN STAINLESS STEEL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In conventional hot-rolled steel strip production, one component corresponds to one finished product, which will lead to problems such as multiple design of grades, chaotic management of grades, frequent changes in smelting control, difficulties in production organization, and a large number of mixed billets, which will cause serious damage to production organization and resources. big waste

Method used

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  • Hot rolling weather-resistant steel belt and flexible production method thereof
  • Hot rolling weather-resistant steel belt and flexible production method thereof
  • Hot rolling weather-resistant steel belt and flexible production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The thickness of the hot-rolled Q355NH weathering steel strip in this embodiment is 3.0 mm, and its chemical composition and mass percentage are shown in Table 1.

[0037] The production method of the hot-rolled Q355NH weather-resistant steel strip in this embodiment includes converter smelting, LF refining, slab continuous casting, heating, rough rolling, finish rolling, cooling and coiling processes, and the specific process steps are as follows:

[0038] (1) Converter smelting and LF refining process: control the chemical composition and mass percentage of molten steel as described in Table 1;

[0039] (2) Slab continuous casting process: continuous casting to obtain a slab with a thickness of 200mm;

[0040] (3) Heating process: heating by a walking heating furnace, the temperature of the billet heating soaking section is 1260°C, the soaking time is 32 minutes, and the total heating time is 200 minutes;

[0041] (4) Rough rolling process: single-stand reciprocating...

Embodiment 2

[0047] The thickness of the hot-rolled Q460NH weathering steel strip in this embodiment is 3.0 mm, and its chemical composition and mass percentage are shown in Table 1.

[0048] The production method of the hot-rolled Q460NH weather-resistant steel strip in this embodiment includes converter smelting, LF refining, slab continuous casting, heating, rough rolling, finish rolling, cooling and coiling processes, and the specific process steps are as follows:

[0049] (1) Converter smelting and LF refining process: control the chemical composition and mass percentage of molten steel as described in Table 1;

[0050] (2) Slab continuous casting process: continuous casting to obtain a steel slab with a thickness of 190mm;

[0051] (3) Heating process: heating by a walking heating furnace, the temperature of the billet heating soaking section is 1250°C, the soaking time is 30 minutes, and the total heating time is 190 minutes;

[0052] (4) Rough rolling process: single-stand recipro...

Embodiment 3

[0058] The thickness of the hot-rolled Q500NH weather-resistant steel strip in this embodiment is 3.0mm, and its chemical composition and mass percentage are shown in Table 1.

[0059] The production method of the hot-rolled Q500NH weather-resistant steel strip in this embodiment includes converter smelting, LF refining, slab continuous casting, heating, rough rolling, finish rolling, cooling and coiling processes, and the specific process steps are as follows:

[0060] (1) Converter smelting and LF refining process: control the chemical composition and mass percentage of molten steel as described in Table 1;

[0061] (2) Slab continuous casting process: continuous casting to obtain a slab with a thickness of 210mm;

[0062] (3) Heating process: heating by a walking heating furnace, the temperature of the billet heating soaking section is 1270°C, the soaking time is 35 minutes, and the total heating time is 230 minutes;

[0063] (4) Rough rolling process: single-stand recipro...

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Abstract

The invention discloses a hot rolling weather-resistant steel belt and a flexible production method thereof. Marks of the weather-resistant steel belt are Q355NH, Q460NH, Q500NH. Chemical components of the hot rolling weather-resistant steel belt comprise, by weight, 0.08-0.10% of C, 0.80-1.00% of Mn, less than or equal to 0.010% of S, less than or equal to 0.025% of P, less than or equal to 0.30%of Si, 0.020-0.050% of Als, 0.020-0.040% of Ti, 0.50-0.75% of Cr, 0.12-0.20% of Ni, 0.25-0.35% of Cu and the balance Fe and inevitable impurity elements. The production method comprises the procedures of converter smelting, LF refining, slab continuous casting, heating, rough rolling, finish rolling, cooling and coiling. By means of the hot rolling weather-resistant steel belt and the flexible production method thereof, the hot rolling weather-resistant steel belts of three levels can be produced from the same components; and performance of the hot rolling weather-resistant steel belts meetsrequirements for welding structure weather-resistant steel.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a hot-rolled weather-resistant steel strip and a flexible manufacturing method thereof. Background technique [0002] Welded structural steel for construction has the characteristics of high strength, light weight, good plasticity and toughness, and fast construction. It is suitable for various engineering structures. In recent years, with the steady growth of steel production and the deepening of global application technology research, welded structural weathering steel has been more and more widely used in the construction industry, especially in super high-rise and long-span buildings. vitality. [0003] Welded structure weathering steel is made of ordinary carbon steel with a small amount of corrosion-resistant elements such as Cu, Cr, Ni, etc., so it has excellent weather resistance, which can not only reduce the coating process of anti-corrosion materials on...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/42C22C38/50C21D8/02C22C33/04
CPCC22C38/02C22C38/04C22C38/06C22C38/42C22C38/50C22C33/04C21D8/0205C21D8/0226C21D8/0263C21D2211/005C21D2211/002
Inventor 贾丽慧张玉文李建设闫萍翁张军赵杨尹宽吴汉科张红娟
Owner TANGSHAN STAINLESS STEEL
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