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System and process for cooling after H-shaped steel is hot-rolled

A technology of cooling system and H-shaped steel, which is applied in metal rolling, manufacturing tools, metal rolling, etc., can solve the problems of large investment and poor effect, and achieve the effect of improving yield strength

Active Publication Date: 2012-09-05
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using such a system for small-sized hot-rolled H-beams is too much investment and the effect is not good

Method used

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  • System and process for cooling after H-shaped steel is hot-rolled
  • System and process for cooling after H-shaped steel is hot-rolled
  • System and process for cooling after H-shaped steel is hot-rolled

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The hot-rolled H-shaped steel enters the post-rolling cooling system, the cooling nozzles on the cooling nozzles on the upper and lower sides are aligned with the upper and lower R parts of the hot-rolled H-shaped steel, and the cooling nozzles on the cooling nozzles on both horizontal sides are aligned with the hot-rolled H-shaped steel The center of the flange on both sides of the horizontal side is sprayed for cooling, and the cooling water pressure and cooling water flow are controlled through the control system, and the cooling water pressure is controlled at 8MPa; the cooling water flow rate is 600m 3 / hour; the continuous cooling time of each section on the control section steel is 10 seconds; the cooling rate is controlled at 50 ° C / second.

Embodiment 2

[0058] The hot-rolled H-shaped steel enters the post-rolling cooling system, the cooling nozzles on the cooling nozzles on the upper and lower sides are aligned with the upper and lower R parts of the hot-rolled H-shaped steel, and the cooling nozzles on the cooling nozzles on both horizontal sides are aligned with the hot-rolled H-shaped steel The center of the flange on both sides of the horizontal is sprayed for cooling, and the cooling water pressure and cooling water flow are controlled through the control system, and the cooling water pressure is controlled at 10MPa; the cooling water flow rate is 400m 3 / hour; control the continuous cooling time of each section on the steel section to 10 seconds; control the cooling rate at 40°C / s.

Embodiment 3

[0060] The hot-rolled H-shaped steel enters the post-rolling cooling system, the cooling nozzles on the cooling nozzles on the upper and lower sides are aligned with the upper and lower R parts of the hot-rolled H-shaped steel, and the cooling nozzles on the cooling nozzles on both horizontal sides are aligned with the hot-rolled H-shaped steel The center of the flange on both sides of the horizontal side is sprayed for cooling, and the cooling water pressure and cooling water flow are controlled through the control system, and the cooling water pressure is controlled at 9MPa; the cooling water flow rate is 500m 3 / hour; control the continuous cooling time of each section on the steel section to 12 seconds; control the cooling rate at 30°C / s.

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Abstract

The invention discloses a system and a process for cooling after H-shaped steel is hot-rolled. The cooling system comprises a control system, a cooling module, a water tank, a water inlet pipeline and a water outlet pipeline, wherein one side of the water inlet pipeline is connected with a water supply system, and the other side of the water inlet pipeline is connected with the water tank; and one side of the water outlet pipeline is connected with the water tank, and the other side of the water outlet pipeline is connected with the cooling module. The cooling process comprises the following steps of: feeding the hot-rolled H-shaped steel into the cooling system, aligning upper and lower R parts of the hot-rolled H-shaped steel with cooling nozzles arranged on the upper and lower sides, aligning flange centers on the left and right sides of the hot-rolled H-shaped steel with cooling nozzles arranged on the left and right sides, performing spray cooling, and controlling the pressure ofcooling water to be between 8 and 10MPa, the flow of the cooling water to be between 400 and 600m<3> / h, the continuous cooling time of each cross section on section steel to be between 10 and 15 seconds and the cooling rate to be between 30 and 50 DEG C / s. The cooling system with small investment is particularly suitable for improving the strength of the hot-rolled H-shaped steel of small specification of below 400mm*200mm.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and relates to a post-rolling cooling system and process for hot-rolled H-shaped steel, in particular to a post-rolled cooling system and process for hot-rolled H-shaped steel with specifications below 400mm×200mm. Background technique [0002] Hot-rolled H-beams below 400mm×200mm, also known as small-size hot-rolled H-beams, are hot-rolled profiles commonly used in engineering and are widely used. The consumption of raw materials and the improvement of material utilization have become an inevitable development trend. To reduce material consumption and improve material utilization must increase the strength of the material per unit cross-sectional area, that is, increase the yield strength, tensile strength and impact toughness of the material. Usually, the main methods to improve the strength of steel under the premise of the same steel type are: in the steelmaking stage, the strength is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B45/02
Inventor 孙维鲁怀敏汪开忠程鼎严锋黄贞益吴正昌张卫斌臧波
Owner MAANSHAN IRON & STEEL CO LTD
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