CN1240854C - High pressure gas quenching cooling method of aerosol forced circulation - Google Patents
High pressure gas quenching cooling method of aerosol forced circulation Download PDFInfo
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- CN1240854C CN1240854C CN 03150783 CN03150783A CN1240854C CN 1240854 C CN1240854 C CN 1240854C CN 03150783 CN03150783 CN 03150783 CN 03150783 A CN03150783 A CN 03150783A CN 1240854 C CN1240854 C CN 1240854C
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Abstract
The present invention relates to a high pressure gas quenching cooling method of aerosol forced circulation, which belongs to the heat treatment field of metal materials. The present invention leads gases and water fog into a container provided with a strong stirring blower and a heat exchanger; the mixture of the gases and the water fog can realize heat exchange with heat workpieces driven by the strong stirring blower; heat absorbed by the gases and the water fog form the workpieces can be carried away by the heat exchanger arranged in the container or exhausted by the exhaust blower from the container; thereby, the purpose of the quickly cooling quenching components can be realized. The combination of the gases and the water fog of the present invention obviously enhances the heat exchange coefficient between a medium and a workpiece, the cooling power between water and still air can be achieved, and the cooling power can be adjusted within definite range.
Description
Technical field
What the present invention relates to is a kind of quenching and cooling method, and particularly a kind of Aerosol Forced Circulating High-Pressure Gas Cooling ﹠ Quenching Method that is applicable to heated parts under vacuum or protective atmosphere belongs to the metal heat treatmet field.
Background technology
For tissue and the performance that obtains to be scheduled to, adopt method of cooling and equipment conventional, special and combination usually.High pressure gas quenching is exactly adopted two kinds of different quenching and cooling methods with fog quenching.High pressure gas quenching is to be medium with neutrality such as nitrogen, helium or rare gas element, feed in process furnace or the special container with certain pressure (2～20bar or higher), gas carries out forced convection under the driving of high-power blower, realize the heat exchange between gas and the workpiece, gas is taken away by the heat exchanger that is arranged on wherein again from the heat that workpiece absorbs, thereby reaches the purpose of quench cooled.This technical disadvantages is: 1) the quench cooled ability is lower, only between gas at rest and salt bath (550 ℃) quench cooled ability, even adopt the helium of 20bar also to be difficult to reach the cooling power of working as with oil phase; 2) need to consume a large amount of high-purity gas and the required electric power of blower fan stirring in the quenching process, cost is higher.Fog quenching is the water of certain pressure and high pressure gas are mixed by nozzle and to be ejected into quenching part surface with the form of mist, realizes the purpose of quench cooled.This technical disadvantages is that the directivity of spraying is stronger, and cooling uniformity is had certain influence.
In order to improve the cooling power of heating under vacuum high pressure gas quenching, generally adopt gaseous tension and the higher helium of price that improves when quenching at present.Find by literature search, Yan Chengpei chief editor's " vacuum heat treatment process and equipment ", China Machine Press, Beijing 1998.10, P40, introduced: adopting the thermal conductivity of helium medium under the situation of 20bar pressure and pump circulation is 900～1000 (Wm
2K
-1), the thermal conductivity of 20～80 ℃ static oil is 1000～1500 (Wm
2K
-1).This shows that the cooling power of the 20bar high-pressure gas quenching furnace of present manufacturing does not still reach the cooling power of static oil.But, adopt the helium quenching of 20bar can make the increase at double of equipment manufacturing cost and running cost, restricted the popularization and the application of this technology.
Summary of the invention
The present invention is directed to existing high pressure gas quenching and two kinds of methods of fog quenching deficiency and defective separately, a kind of Aerosol Forced Circulating High-Pressure Gas Cooling ﹠ Quenching Method has been proposed, advantage to two kinds of methods is carried out the advantage grafting, make it improve quench cooled intensity greatly, and cooling intensity can in very large range be regulated (between the cooling power of water and still air), the characteristics of have simultaneously that production cost is low, pollution-free, production process safety and suitable large-size workpiece quenching.
The present invention is achieved by the following technical solutions, the present invention is by feeding gas and water smoke in the container that is provided with powerful stirring blower fan and heat exchanger, gas and water smoke carry out heat exchange with heated work pieces under the driving of brute force stirring blower fan, the heat that gas and water smoke absorb from workpiece is again by being arranged on that wherein heat exchanger is taken away or by the exhaust blower amount discharge container, thereby realizes the quick cooling purpose of quenching part.The gas of certain pressure and water smoke combine its thermal conductivity is obviously improved, can reach the cooling power of working as with oil or water, and cooling power can be regulated within the specific limits, can realize adjustment to cooling intensity by adjustments of gas pressure, spray intensity and the powerful rotating speed that stirs blower fan.The present invention is that the gas that utilizes fog quenching to have higher cooling intensity and high pressure gas quenching can be realized even refrigerative characteristics under the effect of pump circulation blower fan, water smoke and high pressure gas are mixed into the aerosol mixture, the aerosol mixture is realized fast evenly motion in container under brute force stirring blower fan drives, overcome the insufficient shortcoming of the even high pressure gas cooling power of fog quenching inhomogeneous cooling, realized the purpose of quench cooled rapidly and uniformly.
Gaseous tension is 10 in the container
3～2 * 10
6Between the Pa, the pressure that sprays into water smoke is 5 * 10
4～10
6Between the Pa, the water smoke water content is 0～100% adjustable, and the powerful speed of rotation that stirs blower fan is between 500～2800rpm, adjusts cooling intensity by adjusting these parameters, reaches at water to the cooling power between the still air.Intensity (entering the air quantity and the water yield of cooling room by nozzle) by the computer control spraying, or the pressure of cooling gas or the powerful parameters such as rotating speed that stir blower fan, realize the stepless continuous adjusting of rate of cooling, provide higher cooling intensity in the least stable temperature range of the supercooled austenite of processed steel, the temperature range more stable at supercooled austenite adopts lower rate of cooling, the principle of regulating is that the cooling for each stage provides enough cooling intensity, guarantee to obtain the tissue of expection, do not adopt excessive intensive cooling as far as possible putting before this, with effective control distortion with avoid cracking.The control of cooling intensity can be determined by test or determine according to Computer simulation results in advance, by computer realization open loop control or closed-loop control.
The present invention has substantive distinguishing features and marked improvement, quench with conventional high-tension gas and to compare with the method for fog quenching, the present invention has following characteristics and effect: 1) improved the cooling power of medium greatly by spray into water smoke and high pressure gas in the container with high pressure gas quenching function, overcome high pressure gas quenching method cooling power defect of insufficient; 2) the aerosol mixture is realized fast evenly motion in container under brute force stirring blower fan drives, and has overcome the shortcoming that the fog quenching inhomogeneous cooling is spared.3) can change speed of cooling easily and quickly by the intensity of change spraying or the pressure or the powerful rotating speed that stirs blower fan of cooling gas.
Embodiment
Content in conjunction with the inventive method provides following examples:
Embodiment 1
The tool steel that at first will be heated to quenching temperature in process furnace is transferred in the container that is provided with powerful stirring blower fan, heat exchanger and gas and spraying nozzle, open the powerful blower fan that stirs then, in container, feed nitrogen simultaneously and spray into water smoke, nitrogen and water smoke form gas liquid mixture under the driving of brute force stirring blower fan, gas liquid mixture carries out heat exchange with heated work pieces under the driving of brute force stirring blower fan, adjusting the interior gaseous tension of container is 5 * 10
5Pa, the pressure that sprays into water smoke are 5 * 10
5Pa and water content 50% thereof, the powerful speed of rotation 1500rpm that stirs blower fan, thereby adjustment cooling intensity, reach at water to the cooling power between the still air, the heat that gas liquid mixture absorbs from workpiece is again by being arranged on that wherein heat exchanger is taken away or by the exhaust blower amount discharge container, thereby realizes the quick cooling purpose of quenching part.Present embodiment high pressure gas quenching method cooling power is better, and the fog quenching cooling evenly.
Embodiment 2
The tool steel that at first will be heated to quenching temperature in process furnace is transferred in the container that is provided with powerful stirring blower fan, heat exchanger and gas and spraying nozzle, open the powerful blower fan that stirs then, in container, feed helium simultaneously and spray into water smoke, helium and water smoke form gas liquid mixture under the driving of brute force stirring blower fan, gas liquid mixture carries out heat exchange with heated work pieces under the driving of brute force stirring blower fan, adjusting the interior gaseous tension of container is 2 * 10
5Pa, the pressure that sprays into water smoke are 5 * 10
6Pa and water content 100% thereof, the powerful speed of rotation 2800rpm that stirs blower fan, thereby adjustment cooling intensity, reach at water to the cooling power between the still air, the heat that gas liquid mixture absorbs from workpiece is again by being arranged on that wherein heat exchanger is taken away or by the exhaust blower amount discharge container, thereby realizes the quick cooling purpose of quenching part.Present embodiment high pressure gas quenching method cooling power is very good, and the fog quenching cooling evenly.
Embodiment 3
The tool steel that at first will be heated to quenching temperature in process furnace is transferred in the container that is provided with powerful stirring blower fan, heat exchanger and gas and spraying nozzle, open the powerful blower fan that stirs then, bubbling air and spray into water smoke in container simultaneously, air and water smoke form gas liquid mixture under the driving of brute force stirring blower fan, gas liquid mixture carries out heat exchange with heated work pieces under the driving of brute force stirring blower fan, adjusting the interior gaseous tension of container is 10
3Pa, the pressure that sprays into water smoke are 5 * 10
4Pa and water content 10% thereof, the powerful speed of rotation 500rpm that stirs blower fan, thereby adjustment cooling intensity, reach at water to the cooling power between the still air, the heat that gas liquid mixture absorbs from workpiece is again by being arranged on that wherein heat exchanger is taken away or by the exhaust blower amount discharge container, thereby realizes the quick cooling purpose of quenching part.Present embodiment high pressure gas quenching method cooling power is good, and the fog quenching cooling evenly.
Claims (5)
1, a kind of Aerosol Forced Circulating High-Pressure Gas Cooling ﹠ Quenching Method, it is characterized in that, in the container that is provided with powerful stirring blower fan and heat exchanger, feed gas and spray into water smoke, this container is the container with high pressure gas quenching function, water smoke and high pressure gas are mixed into the aerosol mixture, the aerosol mixture is realized fast evenly motion in container under brute force stirring blower fan drives, the mixture of gas and water smoke carries out heat exchange with heated work pieces under the driving of brute force stirring blower fan, the heat that gas and water smoke absorb from workpiece is again by being arranged on that wherein heat exchanger is taken away or by the exhaust blower amount discharge container, thereby realizes the quick cooling purpose of quenching part.
2, Aerosol Forced Circulating High-Pressure Gas Cooling ﹠ Quenching Method according to claim 1 is characterized in that, gaseous tension is 10 in the container
3～2 * 10
6Between the Pa, the pressure that sprays into water smoke is 5 * (10
4～10
6) between the Pa, the powerful speed of rotation that stirs blower fan is between 500～2800rpm.
3, Aerosol Forced Circulating High-Pressure Gas Cooling ﹠ Quenching Method according to claim 1 and 2, it is characterized in that, intensity by the computer control spraying promptly enters the blast of cooling room and the pressure or the powerful rotating speed that stirs blower fan of the water yield or cooling gas by nozzle, realizes that the stepless continuous of rate of cooling is regulated.
4, Aerosol Forced Circulating High-Pressure Gas Cooling ﹠ Quenching Method according to claim 1 and 2 is characterized in that, the gas in the feeding container is any one in air, nitrogen, the helium.
5, Aerosol Forced Circulating High-Pressure Gas Cooling ﹠ Quenching Method according to claim 1 is characterized in that, the control of cooling intensity is determined by test in advance or determined according to Computer simulation results, by computer realization open loop control or closed-loop control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03150783 CN1240854C (en) | 2003-09-04 | 2003-09-04 | High pressure gas quenching cooling method of aerosol forced circulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03150783 CN1240854C (en) | 2003-09-04 | 2003-09-04 | High pressure gas quenching cooling method of aerosol forced circulation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1492060A CN1492060A (en) | 2004-04-28 |
| CN1240854C true CN1240854C (en) | 2006-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03150783 Expired - Fee Related CN1240854C (en) | 2003-09-04 | 2003-09-04 | High pressure gas quenching cooling method of aerosol forced circulation |
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| Country | Link |
|---|---|
| CN (1) | CN1240854C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111074047A (en) * | 2019-12-19 | 2020-04-28 | 江苏信诺亿科环境技术有限公司 | Quenching waste gas collecting device |
-
2003
- 2003-09-04 CN CN 03150783 patent/CN1240854C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1492060A (en) | 2004-04-28 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Yancheng Fengdong Heat Treatment Co., Ltd. Assignor: Shanghai Jiao Tong University Contract fulfillment period: 2005.6.1 to 2010.6.1 contract change Contract record no.: 2008320000181 Denomination of invention: High pressure gas quenching cooling method of aerosol forced circulation Granted publication date: 20060208 License type: Exclusive license Record date: 2008.9.22 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2005.6.1 TO 2010.6.1 Name of requester: YANCHENG FENGDONG HEAT TREATMENT CO., LTD. Effective date: 20080922 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Yancheng Fengdong Heat Treatment Co., Ltd. Assignor: Shanghai Jiao Tong University Contract fulfillment period: 2007.5.10 to 2012.12.31 contract change Contract record no.: 2008320000181 Denomination of invention: High pressure gas quenching cooling method of aerosol forced circulation Granted publication date: 20060208 License type: Exclusive license Record date: 2008.9.22 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2007.5.10 TO 2012.12.31; CHANGE OF CONTRACT Name of requester: YANCHENG FENGDONG HEAT TREATMENT CO., LTD. Effective date: 20080922 |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060208 Termination date: 20120904 |