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A kind of quenching cooling automatic control method

A technology of quenching machine and control system, which is applied in the direction of quenching device, heat treatment process control, manufacturing tools, etc. It can solve the problems of complex operation, large power consumption, and water consumption of wide and thick plates, so as to reduce production costs, water consumption, and The effect of production power consumption

Active Publication Date: 2022-04-15
LAIWU STEEL YINSHAN SECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a quenching machine cooling water control method to solve the problem that the current wide and thick plate uses a large amount of water and electricity in the quenching process, and the control process needs to be carried out manually, resulting in complicated operations

Method used

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  • A kind of quenching cooling automatic control method
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  • A kind of quenching cooling automatic control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0121] (1) The steel type of the steel plate is high-strength steel with a yield strength of 690MPa; the thickness is 10mm, and the width is 3100mm.

[0122] (2) The steel plate is subjected to shot blasting treatment before quenching, the speed of the shot blasting roller table is 4.0m / min, and the diameter of the shot material used for shot blasting is 1.0-1.4mm.

[0123] (3) Heating process control of the heat treatment furnace: the quenching temperature is 910°C, and the total time in the furnace is 21 minutes.

[0124] (4) Quenching and cooling process control: the water pressure in the high-pressure section is set to 0.8MPa, the roll gap is set to 10.3mm, and the speed of the quenching machine roller table is 13m / min.

Embodiment 2

[0126] (1) The steel type of the steel plate is high-strength steel with a yield strength of 1050MPa; the thickness is 30mm, and the width is 2750mm.

[0127] (2) The steel plate is subjected to shot blasting treatment before quenching, the speed of the shot blasting roller table is 4.0m / min, and the diameter of the shot material used for shot blasting is 1.0-1.4mm.

[0128] (3) Heating process control of the heat treatment furnace: the quenching temperature is 910°C, and the total time in the furnace is 62 minutes.

[0129] (4) Quenching and cooling process control: the water pressure in the high-pressure section is set to 0.8MPa, the roll gap is set to 30.3mm, and the speed of the quenching machine roller table is 7.8m / min.

Embodiment 3

[0131](1) The steel type of the steel plate is high-strength steel with a yield strength of 690MPa; the thickness is 55mm, and the width is 2200mm.

[0132] (2) The steel plate is subjected to shot blasting treatment before quenching, the speed of the shot blasting roller table is 4.0m / min, and the diameter of the shot material used for shot blasting is 1.0-1.4mm.

[0133] (3) Heating process control of the heat treatment furnace: the quenching temperature is 910°C, and the total time in the furnace is 62 minutes.

[0134] (4) Quenching and cooling process control: the water pressure in the high-pressure section is set to 0.8MPa, the roll gap is set to 55.4mm, and the speed of the quenching machine roller table is 4.6m / min.

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Abstract

The invention belongs to the technical field of heat treatment of wide and thick plates, in particular to an automatic control method for quenching and cooling. The method is implemented by a control system including a first-level system, a second-level system, and a third-level system. The third-level system transmits the steel plate information to the second-level system, and the second-level system transmits the quenching machine process to the first-level system. The first-level system controls the on-site quenching process parameters and judges the timing of allowing the steel plate to exit the heat treatment furnace according to the information transmitted by the second-level system. , determine the starting time of the steel plate entering the quenching machine and the position of the steel plate in the quenching machine, and control the flow rate of the nozzle and the switch of the valve according to the size and position of the steel plate. The present invention realizes different quenching and cooling water control strategies according to the thickness of the plate, accurately controls the opening and closing of each nozzle, effectively reduces the water consumption in the quenching process, effectively reduces the operating frequency and high-load operating time of the water supply pump group, and can effectively Reduce production power consumption and reduce production costs.

Description

technical field [0001] The invention belongs to the technical field of heat treatment of wide and thick plates, in particular to an automatic control method for quenching and cooling. Background technique [0002] Steel plate quenching is very important to adjust the performance and shape of wide and thick plate high-strength steel, wear-resistant steel, oil tank steel and other steel types. Roller quenching machine is the key equipment for the heat treatment line of major domestic steel plants. The roller press quenching machine has the advantages of high cooling strength and no soft spots on the surface of the quenched steel plate, and is a key heat treatment method for the development of high value-added and high-strength plate products. [0003] The control of the plate quenching process in major domestic steel mills is: before the steel plate exits the heat treatment furnace, the high-pressure section and low-pressure section of the quenching machine simultaneously open...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/667C21D9/00C21D11/00
CPCC21D1/667C21D9/0081C21D9/0062C21D11/005
Inventor 李涛于全成刘军刚冯文义麻衡谭维钰魏军广张长宏秦港刘青王猛李强高海军邢长怀张梅
Owner LAIWU STEEL YINSHAN SECTION CO LTD
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