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Method for improving quenching medium agitation strength

A quenching medium and strength technology, which is applied in heat treatment process control, manufacturing tools, heat treatment equipment, etc., can solve the problems of uneven heat conduction, weak flow velocity and impact force, etc., to solve the problem of weak flow velocity and impact force, simple implementation, Reduce the effect of uneven heat conduction

Inactive Publication Date: 2008-08-27
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention proposes a method for improving the agitation strength of the quenching medium, and adopts the method of combining mechanical agitation and compressed air agitation to agitate the medium, which solves the problem of weak flow velocity and impact force of the purely mechanical agitation medium At the same time, it also weakens the problem of uneven heat conduction caused by pure compressed air stirring

Method used

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  • Method for improving quenching medium agitation strength
  • Method for improving quenching medium agitation strength
  • Method for improving quenching medium agitation strength

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This example uses a quenching tank with a combination of pump stirring and compressed air stirring, see attached figure 1 . The quenching tank is composed of an overflow tank 1, a tank body 2, a quenching effective area 3, a compressed air nozzle 4, an annular compressed air pipe 5, a compressed air pipe 6, a liquid pipeline 7, a pump 8 and a liquid equalization device 9.

[0023] Mechanical stirring: The pump stirring of the quenching tank is to extract the medium from the overflow tank 1 under the action of the pump 8. The medium flows through the liquid pipeline 7 into the liquid equalization device 9 in the tank body 2 for flow equalization, and then the medium flows After the quenching effective area 3 is returned to the overflow tank 1, so that the flow of the medium is formed reciprocatingly, and multiple sets of pump stirring systems can be arranged in a quenching tank.

[0024] Stirring of compressed air: firstly, compressed air is passed into the compressed air p...

Embodiment 2

[0027] This example uses a quenching tank with a propeller agitator and compressed air agitating compound, see attached figure 2 . The quenching tank is composed of a propeller stirrer 1, a tank body 2, a quenching effective area 3, a compressed air nozzle 4, an annular compressed air pipe 5, a compressed air pipe 6, a flow guide tube 7 and a flow equalizing device 8.

[0028] Mechanical stirring: The propeller agitator 1 of the quenching tank pushes the medium from the upper part of the quenching tank to the bottom of the quenching tank through the guide tube 7, the medium is evened by the flow equalization device 8, and then the medium flows through the quenching effective area 3 and then returns to the quenching In the upper part of the tank, the flow of the medium is formed reciprocatingly, and multiple sets of propeller agitators 1 can be arranged in a quenching tank.

[0029] Stirring of compressed air: firstly, compressed air is passed into the compressed air pipe 6, and t...

Embodiment 3

[0032] This example uses a quenching tank with a propeller agitator, pump agitation and compressed air agitation, see attached image 3 . The quenching tank consists of propeller agitator 1, tank body 2, quenching effective area 3, compressed air nozzle 4, annular compressed air pipe 5, compressed air pipe 6, pipeline 7, pump 8, flow equalization device 9, and guide tube 10 , The ring-shaped medium pipeline 11, the medium nozzle 12, the overflow pipe 13 and the overflow groove 14 are composed.

[0033] Mechanical stirring: The propeller stirrer 1 of the quenching tank pushes the medium from the upper part of the quenching tank to the bottom of the quenching tank through the guide tube 10, the medium is evened by the flow equalization device 9, and then the medium flows through the quenching effective area 3 and then returns to the quenching In the upper part of the tank, the flow of the medium is formed reciprocatingly, and multiple sets of propeller agitators 1 can be arranged in ...

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Abstract

A process for increasing the stirring strengthen of quenching medium belongs to the metal material heat treatment field. The invention stirs the quenching medium through the combination method of the mechanical stirring and compressed air jet, and the mechanical stirring and compressed air jet are conducted simultaneously, or be conducted in the order of the mechanical stirring and compressed air jet, wherein the mechanical stirring realizes the motion of quenching medium under the set speed, forces medium to flow along the fixed route, and provides new medium for the quenching region, and the compressed air jet accelerates the flowing medium and increases the vibration speed thereof, thereby realizing the purpose of eliminating in advance or thinning steam blanket which is formed on the surface of metal. The process solves the problems of weak flow speed and impact through stirring medium merely by the mechanical stirring, simultaneously weakens the problem of uneven heat conductivity existing in the mere compressed air stirring.

Description

Technical field [0001] The invention relates to a method in the field of heat treatment of metal materials, in particular to a method for improving the stirring strength of quenching medium, especially for the situation where the stirring area is large and the stirring strength is particularly high. Background technique [0002] Quenching refers to heating the steel to A C3 Or A C1 A certain temperature above the point, keep it for a certain period of time, and then cool at the required speed to obtain the heat treatment process of the desired structure. One of the important factors that determine the quality of quenching is the quenching medium, and one of the important factors affecting the cooling characteristics of the quenching medium is the movement of the medium. One of the effects of the movement of the medium is to impact the vapor film formed on the metal surface to make it disappear or thin in advance, so as to achieve rapid and relatively uniform cooling of the metal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D11/00
Inventor 陈乃录左训伟张幸徐骏
Owner SHANGHAI JIAO TONG UNIV
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