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: 2010-11-03
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

Examples

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Effect test

example 1

[0026] Example 1: Using gas bath slow cooling device structure one for steel processing gas bath slow cooling process: see figure 1 , First add cold water to the bottom of the slow cooling pit 4 through the water inlet pipe 3. Generally, the water level is controlled at 2 / 3 of the height of the square steel horn 7, and the highest shall not exceed the square steel horn 7. Then, the high-temperature steel 6 (in bundles) is hoisted into the slow cooling pit 4 (shelved on the square steel horn 7), covered with the heat preservation cover 1, and in due course through the water inlet pipe 3 to the bottom of the slow cooling pit 4 For water replenishment, the cold water is vaporized by the temperature of the steel itself to form a gas bath for slow cooling, which can be lifted out of the slow cooling pit in about 36 hours.

example 2

[0027] Example 2: Using gas bath slow cooling device structure two for steel processing gas bath slow cooling process: see image 3 , First hoist the high-temperature steel 6 (in bundles) into the slow cooling pit 4 (shelving on the square steel horn 7) and cover the thermal insulation cover 1, and pour cold water through the external inlet of the water storage tank 8, (the height of the cold water does not exceed The height of the water storage tank 8 is sufficient), and observe the water level, add water in a timely and appropriate amount, and vaporize the cold water through the temperature of the steel itself to form a gas bath for slow cooling. After about 38 hours, the slow cooling pit can be lifted out.

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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 the slow-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 after 35-38 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, and is a gas bath slow cooling device for processing special steel materials. (2) Background technology: [0002] In the cooling process of processing, production, and cooling of premium steel materials, the structure will change when cooled from a 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 get different structures from the surface to the inside during the cooling process, and this change in the structure will produce organizational stress. At the same time, the temperature drop on the steel surface is too fast, and the temperature drop at the core is slow. This temperature difference will cause thermal stress. The results of the two kinds of stresses often cause cracks on the surface and core of the steel. The occurrence of such cracks increases with the expansion of production specifications. Th...

Claims

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Application Information

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Patent Type & Authority Patents(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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