Gas-bath slow-cooling process and device for processing best excellent steel sheets

A technology of steel and air bath, which is applied in the field of air bath slow cooling device for super-high-quality steel processing, which can solve the problems of uneven cooling of steel, slow slow cooling speed, high cutting rate, etc., and achieve low cutting rate and improved slow cooling effect , Improve slow cooling effect and efficiency

Active Publication Date: 2010-02-10
DAYE SPECIAL STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of slow cooling speed, low efficiency, uneven cooling of steel and high head-cutting rate in the existing slow cooling method, and provide a new process and device for slow cooling in an air bath for special steel processing

Method used

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  • Gas-bath slow-cooling process and device for processing best excellent steel sheets
  • Gas-bath slow-cooling process and device for processing best excellent steel sheets
  • Gas-bath slow-cooling process and device for processing best excellent steel sheets

Examples

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Effect test

example 1

[0026] Example 1: Air-bath slow-cooling process for steel processing using structure 1 of the air-bath slow-cooling device: see figure 1 , at first add cold water to the bottom of slow cooling pit 4 by water inlet pipe 3, general water level is controlled at the 2 / 3 height of square steel horn 7, must not exceed square steel horn 7 at the most. Then high-temperature steel 6 (in bundles) is hoisted into the slow cooling pit 4 (placed on the square steel backing iron 7), covered with a thermal insulation cover 1, and passed through the water inlet pipe 3 to the bottom of the slow cooling pit 4 in a timely manner as required To replenish water, the cold water is vaporized by the temperature of the steel itself, forming an air bath for slow cooling, and the slow cooling pit can be lifted out in about 36 hours.

example 2

[0027] Example 2: Air-bath slow-cooling process for steel processing using the second structure of the air-bath slow-cooling device: see image 3 First, the high-temperature steel 6 (in bundles) is hoisted into the slow cooling pit 4 (placed on the square steel pad iron 7) and the heat preservation cover 1 is covered, and cold water is poured into the external inlet of the water storage tank 8, (the height of the cold water is not more than The height of water storage tank 8 gets final product), and observe water level, add water in right amount, make cold water gasification by the temperature of steel itself, form air bath slow cooling, about 38 hours, can hang out slow cooling pit.

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Abstract

The invention relates to a metallurgical processing technology, in particular to a gas-bath slow-cooling process and a device for processing best excellent steel sheets, which improve traditional slow-cooling technology. The gas-bath slow-cooling process is technically characterized by comprising the following steps: piling steel sheets processed and formed at high temperature in a slow-cooling pit of a special gas-bath slow-cooling device; covering with an insulating cover; immediately adding cold water to the bottom of the slow-cooling pit before or after the steel sheets are put in the slow-cooling pit, wherein the depth of the cold water is lower than or equal to the depth of square steel parallel blocks at the bottom of the slow-cooling pit; duly adding cold water to the bottom of theslow-cooling pit according to needs; gasifying the cold water by the self high temperature of the steel sheets to form a gas-bath slow-cooling phenomenon; and taking out of the slow-cooling pit after35-38 hours. The special gas-bath slow-cooling device has additional water-adding function. The invention changes a natural slow-cooling mode of a traditional device, greatly improves the slow-cooling effect and efficiency and the turnover utilization rate of the slow-cooling device and is particularly suitable for processing especially excellent steel sheets.

Description

(1) Technical field: [0001] The invention relates to metallurgical processing equipment, which is an air-bath slow cooling device for super-high-quality steel processing. (two) background technology: [0002] For special steel materials, during the cooling process of processing and production, the transformation of the structure will occur after cooling from the high temperature zone (above 800 °C). Due to the difference in cooling rate between the surface and the core of the steel, the steel will obtain different structures from the surface to the inside during the cooling process, and this change in structure will generate structural stress. At the same time, the temperature drop of the steel surface is too fast, and the temperature drop of the core is relatively slow. This temperature difference will generate thermal stress. As a result of the two kinds of stress, cracks often occur on the surface and core of the steel. The occurrence of such cracks increases with the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/84C21D11/00
CPCY02P10/20
Inventor 文武李名鹏雷应华左伯青张建安潘文桥
Owner DAYE SPECIAL STEEL CO LTD
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