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High-temperature water cooling device and method

A water-cooling device and water-cooling technology, applied in quenching devices, heat treatment equipment, manufacturing tools, etc., can solve the problems of small heat absorption, size and specification restrictions, laminar cooling cannot be realized, etc., and achieve the goal of preventing overcooling and high cooling speed Effect

Inactive Publication Date: 2012-12-26
LAIWU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the Chinese patent application with application number 200510046822.4 discloses a device and method using high-pressure water cooling, which uses high-pressure water flow as a cold source to realize rapid cooling of castings, but it has defects such as small actual heat absorption and difficult temperature control.
With the development of materials, many new requirements have been put forward for the heat treatment process. For example, in the online heat treatment of steel plates, it is necessary to quench the material to a temperature of bainite and martensite above 100°C. Common laminar flow cooling , air mist cooling, etc. cannot achieve this function
Quenching oil and salt bath furnaces can realize the cooling system of temperature control, but they are all limited by size and specifications, and the cost is high and the pollution is serious

Method used

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  • High-temperature water cooling device and method

Examples

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example 1

[0017] as attached figure 1 As shown, in this example, a steel plate with a thickness of 30mm and a temperature of 800°C is to be quenched to 180°C at the fastest possible cooling rate, and the temperature at the end of quenching needs to be controlled at 180°C without overcooling.

[0018] The device includes: an autoclave B-1, a water pump E-1 and a nozzle S-1, wherein the cooling water inlet P-1 is connected to the autoclave, the autoclave is connected to the water pump, and the water pump is connected to a high temperature and high pressure nozzle , There is also a stirring motor in the autoclave to ensure uniform temperature. All devices except P-1 can withstand a pressure of 30MPa and a temperature of 235°C.

[0019] The cooling process is detailed as follows:

[0020] Lead the cooling water (60°C, normal pressure) at the outlet of the continuous casting crystallizer into the autoclave and heat it to 180°C. At this time, the steam pressure in the autoclave reaches 1.003...

example 2

[0022] In this example, a steel plate with a thickness of 30 mm and a temperature of 800 °C is to be quenched to 190 °C at the fastest possible cooling rate, and the temperature at the end of quenching must be controlled at 190 °C without overcooling.

[0023] The device includes: an autoclave B-1, a water pump E-1 and a nozzle S-1, wherein the cooling water inlet P-1 is connected to the autoclave, the autoclave is connected to the water pump, and the water pump is connected to a high temperature and high pressure nozzle , There is also a stirring motor in the autoclave to ensure uniform temperature. All devices except P-1 can withstand a pressure of 30MPa and a temperature of 235°C.

[0024] The cooling process is detailed as follows:

[0025] Lead the cooling water (60°C, normal pressure) at the outlet of the continuous casting crystallizer into the autoclave and heat it to 190°C. At this time, the steam pressure in the autoclave reaches 1.256MPa, which is about 12.5 atmosph...

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Abstract

The invention discloses a high-temperature and high-pressure water cooling device and a method, which can realize ultra-high-speed cooling and control the bottom cooling temperature flexibly at the same time. The method comprises the steps that cooling water (below 100 DEG C and at atmospheric pressure) with a great quantity of surplus heat generated in other production processes is heated in a high-pressure autoclave continuously to reach the required temperature, and sprayed to the surface of an object to be cooled (for instance, a steel plate) at high speed through a high-pressure water pump and a pipeline, and the object is cooled depending on instantaneous intensive vaporization of high-temperature water for heat absorption; and the intensity of cooling can be controlled by water temperature, water pressure and water flow. Since the high-temperature water is adopted for cooling, the cooled object is not subjected to undercooling; some industrial conditions requiring that the bottom cooling temperature is not less than a certain temperature (for instance, 150 DEG C) can be satisfied, and the cooling system difficult for the ordinary water cooling to accomplish is realized. Taking the step quenching of the steel plate as an example, the purposes of rapid cooling and controlling of the bottom cooling temperature are realized.

Description

technical field [0001] The invention relates to the technical field of rapid cooling, in particular to a high-temperature and high-pressure water cooling device and a water cooling method that can realize ultra-high-speed cooling and flexibly control the temperature of the cooling bottom. Background technique [0002] Metal technology includes three basic components, smelting - to obtain a certain composition of metal; processing - to obtain a certain external shape of the product; heat treatment - through which the metal can obtain a certain internal microstructure, so as to achieve the required performance indicators . Any kind of heat treatment is to heat the metal to a certain temperature and then cool it down, so that the internal microstructure of the metal will undergo the desired change. [0003] Water-cooling or air-cooling methods are generally used now. For example, the Chinese patent application with application number 200510046822.4 discloses a device and meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/667B22D11/124
Inventor 朱京军刘成宝
Owner LAIWU IRON & STEEL GRP
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