CN1269987C - Heat treatment method and apparatus - Google Patents
Heat treatment method and apparatus Download PDFInfo
- Publication number
- CN1269987C CN1269987C CN 02115149 CN02115149A CN1269987C CN 1269987 C CN1269987 C CN 1269987C CN 02115149 CN02115149 CN 02115149 CN 02115149 A CN02115149 A CN 02115149A CN 1269987 C CN1269987 C CN 1269987C
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- retort
- penetration enhancer
- treating method
- heat treating
- vacuum extractor
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Abstract
The present invention relates to a heat treatment method and a device thereof, which has the technical scheme that air and ageing atmosphere in an oven tank is quickly removed by a negative pressure transformation process, and then, the negative pressure prompts a medium to enter the oven tank quickly and automatically and uniformly diffuses everywhere by a blower; because the medium enter the oven tank without the air and the ageing atmosphere quantitatively, the present invention has the advantages of high quality of workpieces after heat treatment (no black structure from oxidation), small energy consumption, high seeping speed and no pollution.
Description
Technical field:
The present invention relates to a kind of heat treating method.
Background technology:
Existing carburizing, carbonitriding are carried out under constant voltage, penetration enhancer in the burner hearth around the workpiece is a mobile, when fresh penetration enhancer enters burner hearth continuously, waste gas in the stove (aging atmosphere) continuously is discharged from outside the burner hearth, and take away a large amount of heat energy, workpiece is finished the carburizing or carbonitriding process under constant voltage and penetration enhancer flow condition.This kind technology is owing to will constantly add fresh penetration enhancer, constantly waste gas is drained simultaneously, to keep carbon potential or nitrogen gesture in the burner hearth to meet the requirements, and the useful penetration enhancer of part pyritous also will be drained inevitably in the exhaust gas discharging process, like this, not only wasted penetration enhancer, the more important thing is and to consume a large amount of energy, simultaneously, owing to remain malleation in the burner hearth, remain in the waste gas between slight gap between workpiece (aging atmosphere) and be not easy to flow and obtain replacing, make this part surface of workpiece can not obtain required infiltration layer, therefore, certain clearance must be kept between the workpiece in the burner hearth, output certainly will be influenced like this, in addition, blind hole is arranged on the workpiece, during micropore, because blind hole under constant voltage, waste gas in the micropore (aging atmosphere) can not be drained, and makes blind hole, micropore can not obtain required infiltration layer, as for the groove on the workpiece surface, if groove is very dark, then can not get required infiltration layer equally because of the waste gas in the groove can not obtain upgrading.
Summary of the invention:
Goal of the invention of the present invention be to provide the workpiece quality after a kind of thermal treatment good (the black tissue that non-oxidation generates), less energy consumption, infiltration rate soon, the heat treating method of pollution-free green.
Heat treating method of the present invention is to realize like this, comprise the heat treated workpiece of needs put in the airtight thermal treatment retort and to the workpiece in the thermal treatment retort and carry out the heat treated process of surface chemistry, its special feature is that the thermo-chemical treatment process is such:
The first step: earlier retort is pumped into rough vacuum, then in retort, sucks or injection penetration enhancer (gas or liquid), so that rapidly with air in the retort or waste gas (aging atmosphere) emptying;
In order to guarantee that said process can repeat repeatedly with air in the retort or waste gas (aging atmosphere) emptying;
Pressure in the said process in the retort remains in the 0.05-0.005MP scope;
Second step: fresh penetration enhancer enters retort by under meter immediately quantitatively, directionally, rapidly under negative pressure, and be diffused into automatically in the retort everywhere, fresh penetration enhancer enters behind the retort pressure in the retort and is elevated to normal pressure from negative pressure and is elevated to malleation again, keep the atmosphere of regular hour in retort aging in malleation, the time that malleation keeps is 1 to 20 minute;
After the penetration enhancer atmosphere in the retort was aging, vacuum pump started, and repeated first, second above-mentioned step then, obtained required infiltration layer until workpiece.
Here, can be distributed to equably rapidly in the retort in order to make penetration enhancer, penetration enhancer is to enter quantitatively voluntarily in the retort and by blower fan by the hole that retort covers face to make furnace gas carry out internal recycle.
Vacuum extractor adopts the water ring vacuum extractor, puts into sterilizing agent in the recirculated water of water ring vacuum extractor, carries out disinfection voluntarily behind the cyclic water tank of harmful furnace gas by the water ring vacuum extractor of extracting out in the retort.Sterilizing agent can be ferrous sulfate, can be chlorinated lime.
Thermal treatment unit of the present invention is to realize like this, comprise the body of heater that has electric heater unit, be arranged on the intravital retort of stove, sealable lid tightly the lid of the retort on retort, drive electric pushrod device, penetration enhancer adding set, vacuum extractor, the control device of the action of retort lid, vacuum extractor connects with valve tube on the retort, its special feature is that retort covers and is provided with seal fan that penetration enhancer adds pipe and is positioned at the draught fan impeller top.
For the structure of simplified apparatus, reduce the volume of equipment, be provided with water jacket on retort top, the valve tube of bleeding that connects with the retort wall is arranged in the water jacket, and the valve tube of bleeding of drawing from water jacket links to each other with vacuum extractor.The effect one of water jacket is the waste gas in valve tube cooling, and two prevent the seal washer Yin Gaowen below the retort lid and softening transform makes its loss of seal performance.
The present invention compared with the prior art, owing to adopted the thermal treatment process of exhaust of rough vacuum transformation and malleation pressurization, (being no more than 10 minutes) at short notice just can be with air in the retort or waste gas (aging atmosphere) emptying, quantitatively add penetration enhancer then, carbon potential or nitrogen gesture in the heat treatment of workpieces process are met the requirements, make workpiece energy closely packed in retort, significantly improved the batch of retort, and infiltration rate is fast, aperture blind hole hole wall and very dark groove all can obtain satisfied infiltration layer, the penetration enhancer consumption is few, energy consumption is little, need not handle by the three wastes, clean environment, composition of fumes adopts static control (quantitatively adding penetration enhancer after air or the waste gas emptying), easy to operate, and at an easy rate carbon potential is remained in the optimum regime, adopt the rough vacuum structure, make the cost of vacuum system be lower than high vacuum system widely, and reduced maintenance cost (can reach 80%) significantly, adopt the carbon potential or the nitrogen gesture of static control furnace gas, the cost of Controlling System and maintenance cost reduce (can reach 90%) significantly than the cost and the maintenance cost of kinetic control system.
Description of drawings:
Fig. 1 is the structural representation of thermal treatment unit of the present invention;
Fig. 2 is a control flow chart of the present invention.
Embodiment:
Now in conjunction with the accompanying drawings and embodiments the present invention is described in further detail:
Heat treating method of the present invention is to realize like this, comprise the heat treated workpiece of needs put in the airtight thermal treatment retort and to the workpiece in the thermal treatment retort and carry out the heat treated process of surface chemistry, its special feature is that the thermo-chemical treatment process is such:
The first step: earlier retort is pumped into rough vacuum, then suck in retort or injection penetration enhancer (gas or liquid), the pressure of above-mentioned steps in retort remains on and repeats voluntarily repeatedly in the 0.05-0.005MP scope so that rapidly with air in the retort or waste gas (aging atmosphere) emptying;
Second step: fresh penetration enhancer enters retort by under meter immediately quantitatively, directionally, rapidly under negative pressure, and be diffused into automatically in the retort everywhere, fresh penetration enhancer enters behind the retort pressure in the retort and is elevated to normal pressure from negative pressure and is elevated to malleation again, keeps 5 to the 10 minutes atmosphere in retort aging in malleation;
After the penetration enhancer atmosphere in the retort was aging, vacuum pump started, and repeated first, second above-mentioned step then voluntarily, obtained required infiltration layer until workpiece.
Here, can be distributed to equably rapidly in the retort in order to make penetration enhancer, penetration enhancer is to enter quantitatively voluntarily in the retort and by seal fan by the hole that retort covers face to make furnace gas carry out internal recycle.
Vacuum extractor adopts the water ring vacuum extractor, puts into sterilizing agents such as ferrous sulfate, chlorinated lime in the recirculated water of water ring vacuum extractor, carries out disinfection voluntarily behind the cyclic water tank of harmful furnace gas by the water ring vacuum extractor of extracting out in the retort.
Thermal treatment unit of the present invention is to realize like this, comprise the body of heater 2 that has electric heater unit 1, be arranged on the retort 3 in the body of heater 2, sealable lid is the lid of the retort on retort 34 tightly, drive the electric pushrod device 5 of retort lid 4 actions, penetration enhancer adding set 6, vacuum extractor 7, control device 8, vacuum extractor 7 connects with valve tube 9 on the retort 3, its special feature is that retort lid 4 is provided with seal fan 11, penetration enhancer adds pipe 12 and is positioned at seal fan 11 impellers 13 tops, be provided with water jacket 14 on retort 3 tops, the valve tube 9 of bleeding that connects with retort 3 walls is arranged in the water jacket 14, and the valve tube 9 of bleeding of drawing from water jacket 14 links to each other with vacuum extractor 7.As shown in Figure 2, control device 8 is according to opportunity, time and the number of times of the work of the amount of the interpolation penetration enhancer of pressure in the retort 3 and pre-set programs control penetration enhancer adding set 6 and vacuum extractor 7.
Claims (6)
1, a kind of heat treating method comprises the heat treated workpiece of needs put in the airtight thermal treatment retort and to the workpiece in the thermal treatment retort and carries out the heat treated process of surface chemistry, it is characterized in that the thermo-chemical treatment process is such:
The first step: earlier retort is pumped into rough vacuum, then in retort, sucks or the injection penetration enhancer, so that rapidly with air in the retort or waste gas emptying;
Second step: fresh penetration enhancer enters retort quantitatively, directionally, rapidly by under meter immediately, and be diffused into automatically in the retort everywhere, fresh penetration enhancer enters behind the retort pressure in the retort and is elevated to normal pressure from negative pressure and is elevated to malleation again, keep the regular hour in malleation, the time that malleation keeps is 1 to 20 minute;
Above-mentioned steps repeats repeatedly to obtain required infiltration layer until workpiece.
2, heat treating method according to claim 1 is characterized in that the first step can repeat repeatedly air in retort or waste gas emptying.
3, heat treating method according to claim 1 and 2, when it is characterized in that carrying out the first step, the pressure in the retort remains in the 0.05-0.005MP scope.
4, heat treating method according to claim 1 is characterized in that penetration enhancer is to enter quantitatively voluntarily in the retort and by blower fan by the hole that retort covers face to make furnace gas carry out internal recycle.
5, heat treating method according to claim 1, it is characterized in that vacuum extractor adopts the water ring vacuum extractor, in the recirculated water of water ring vacuum extractor, put into sterilizing agent, carry out disinfection voluntarily behind the cyclic water tank of harmful furnace gas of extracting out in the retort by the water ring vacuum extractor.
6, heat treating method according to claim 5 is characterized in that sterilizing agent can be ferrous sulfate, can be chlorinated lime.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02115149 CN1269987C (en) | 2002-04-26 | 2002-04-26 | Heat treatment method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02115149 CN1269987C (en) | 2002-04-26 | 2002-04-26 | Heat treatment method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1401814A CN1401814A (en) | 2003-03-12 |
| CN1269987C true CN1269987C (en) | 2006-08-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02115149 Expired - Fee Related CN1269987C (en) | 2002-04-26 | 2002-04-26 | Heat treatment method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1269987C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106676443A (en) * | 2016-12-15 | 2017-05-17 | 贵州安吉航空精密铸造有限责任公司 | Vacuum heat treatment technology for magnesium alloy casting |
| CN112662970A (en) * | 2020-12-03 | 2021-04-16 | 上海航天精密机械研究所 | Environment-friendly magnesium alloy part heat treatment method and device |
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2002
- 2002-04-26 CN CN 02115149 patent/CN1269987C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1401814A (en) | 2003-03-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Foshan city Yang Ge Furnace Co., Ltd. Assignor: Yangge Heat Treatment Co., Ltd., Foshan City Contract fulfillment period: 2008.4.17 to 2022.4.25 contract change Contract record no.: 2009440001399 Denomination of invention: Anti-large-deformation pipe line steel prepared by thermal treatment method and preparation method thereof Granted publication date: 20060816 License type: Exclusive license Record date: 2009.9.9 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.4.17 TO 2022.4.25; CHANGE OF CONTRACT Name of requester: FOSHAN CITY YANGGE STOVE CO., LTD. Effective date: 20090909 |
|
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Foshan city Yang Ge Furnace Co., Ltd. Assignor: Yangge Heat Treatment Co., Ltd., Foshan City Contract record no.: 2009440001399 Date of cancellation: 20151224 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160125 Address after: 528231, Guangdong Province, Foshan City, Nanhai District lion Town Tan Tan Second Industrial Zone on the west side of the rainbow road Patentee after: Foshan city Yang Ge Furnace Co., Ltd. Address before: The five peak of 528000 in Guangdong province Foshan City Rhombomys Industrial Zone No. four Patentee before: Yangge Heat Treatment Co., Ltd., Foshan City |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060816 Termination date: 20160426 |