US20060157169A1 - Gas quenching cell for steel parts - Google Patents
Gas quenching cell for steel parts Download PDFInfo
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- US20060157169A1 US20060157169A1 US11/109,429 US10942905A US2006157169A1 US 20060157169 A1 US20060157169 A1 US 20060157169A1 US 10942905 A US10942905 A US 10942905A US 2006157169 A1 US2006157169 A1 US 2006157169A1
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- speed
- plateau
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- quenching
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- 238000010791 quenching Methods 0.000 title claims abstract description 133
- 230000000171 quenching effect Effects 0.000 title claims abstract description 132
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 16
- 239000010959 steel Substances 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 41
- 239000012809 cooling fluid Substances 0.000 claims description 41
- 230000007704 transition Effects 0.000 claims description 11
- 230000003068 static effect Effects 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 80
- 229910000734 martensite Inorganic materials 0.000 description 14
- 230000009466 transformation Effects 0.000 description 11
- 230000001174 ascending effect Effects 0.000 description 9
- 238000001816 cooling Methods 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 7
- 230000006872 improvement Effects 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 229910001566 austenite Inorganic materials 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 229910000658 steel phase Inorganic materials 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/613—Gases; Liquefied or solidified normally gaseous material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2241/00—Treatments in a special environment
- C21D2241/01—Treatments in a special environment under pressure
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
Definitions
- the present invention relates to a gas-quenching cell for steel parts and more specifically a steel part gas quenching method implemented in such a quenching cell.
- the gas quenching of steel parts which have previously undergone a heat processing is generally performed with a pressurized gas, generally between 4 and 20 bars.
- the quenching gas for example is nitrogen, argon, helium, carbon dioxide, or a mixture of these gases.
- a quenching operation consists of rapidly cooling down steel parts which generally are at temperatures ranging between 750° C. and 1000° C. At such temperatures, the steel essentially is in the form of austenite, which is only stable at high temperatures.
- a quenching operation provides by a fast cooling down, a transformation of the austenite into martensite, which exhibits high hardness properties. The quenching operation must be relatively fast so that all the austenite turns into martensite with no forming of other steel phases of perlite or bainite type, which have lower hardness properties than martensite.
- a quenching cell generally comprises at least one motor, generally of electric type, rotating a stirring element, for example, a helix, adapted to circulating the quenching gas in the quenching cell.
- the quenching gas is usually circulated at the level of the parts to be cooled down at the highest possible speed for the entire quenching operation.
- a quenching operation is thus conventionally performed by imposing a static quenching gas pressure in the quenching cell, and by controlling the motor at a maximum rotation speed to obtain a maximum circulation speed of the quenching gas at the level of the steel parts to be cooled down.
- gas quenching methods enable obtaining quenched parts having strongly decreased deformations with respect to oil quenching methods, it would be desirable to provide a gas quenching method enabling further decreasing the deformations of the quenched parts.
- the present invention aims at obtaining a method for quenching steel parts and a quenching cell for implementing such a method providing quenched parts with an improved fatigue strength and/or with reduced deformations.
- Another object of the present invention is to obtain a quenching cell enabling implementation of the quenching method according to the present invention and with a structure which is little modified with respect to a conventional quenching cell.
- the present invention provides a method for quenching a steel load by flowing of a gas at the level of the load via gas moving means.
- the moving means are controlled to have the gas flow at the load level at a speed which varies according to a speed profile, at least a portion of which comprises, successively, a plateau at a first speed and a plateau at a second speed greater than the first speed.
- the gas after having flowed at the level of the load, is cooled down by an exchanger in which flows a cooling fluid.
- the moving means are controlled to have the gas flow at the level of the load from the plateau at the first speed to the plateau at the second speed when the temperature of the cooling fluid reaches a given threshold temperature.
- the static pressure of the gas at the level of the load is decreased during the plateau at the first speed with respect to the plateau at the second speed.
- the gas after having flowed at the level of the load, is cooled down by an exchanger in which flows a cooling fluid, the moving means being controlled to have the gas flow at the load level according to a speed profile successively comprising a first plateau at the second speed, a plateau at the first speed and a second plateau at the second speed, the transition between the first plateau at the second speed and the plateau at the first speed being performed during a cooling fluid temperature increase phase.
- the moving means are controlled to have the gas flow at the level of the load from the first plateau at the second speed to the plateau at the first speed when the cooling fluid temperature exceeds a given threshold temperature.
- the moving means are controlled to have the gas flow at the level of the load from the plateau at the first speed to the second plateau at the second speed when the cooling fluid temperature decreases under a given additional threshold temperature.
- the moving means are controlled to have the gas flow at the level of the load from the first plateau at the second speed to the plateau at the first speed after a determined time.
- the gas after having flowed at the level of the load, is cooled down by a exchanger in which flows a cooling fluid, the moving means being controlled to have the gas flow at the level of the load according to a speed profile comprising, from the beginning of a quenching operation, successively a plateau at the first speed and a plateau at the second speed, the transition between the plateau at the first speed and the plateau at the second speed being performed during an increase phase of the cooling fluid temperature.
- the moving means are controlled to have the gas flow at the level of the load from the plateau at the first speed to the plateau at the second speed after a determined time.
- the present invention also provides a gas quenching cell of a load comprising a stirring element driven by a motor to cause a gas flow between the load and an exchanger.
- the cell comprises means capable of varying the stirring element drive speed to have the gas flow at the load level at a speed which varies according to a speed profile comprising at least successively a plateau at a first speed and a plateau at a second speed greater than the first speed.
- FIGS. 1A and 1B show two views of an example of the forming of a gas quenching cell according to the present invention
- FIG. 2 shows the variation of the quenching gas speed at the level of a load contained in a quenching cell according to FIGS. 1A and 1B and the temperature variation of the cooling fluid of an exchanger of the cell in the case of a conventional quenching method;
- FIG. 3 shows the variation of the quenching gas speed at the level of a load contained in a quenching cell according to FIGS. 1A and 1B and the temperature variation of the cooling fluid of an exchanger of the cell in the case of a first example of a quenching method according to the present invention
- FIG. 4 shows the variation of the temperature at the level of a load contained in a quenching cell according to FIGS. 1A and 1B processed according to a conventional quenching method and the first example of quenching method according to the present invention
- FIG. 5 shows the variation of the quenching gas speed at the level of a load contained in a quenching cell according to FIGS. 1A and 1B and the temperature variation of the cooling fluid of an exchanger of the cell in the case of a second example of a quenching method according to the present invention
- FIG. 6 shows the variation of the quenching gas speed at the level of a load contained in a quenching cell according to FIGS. 1A and 1B and the temperature variation of the cooling fluid of an exchanger of the cell in the case of a third example of a quenching method according to the present invention.
- FIGS. 1A and 1B schematically show a lateral cross-section view and a front cross-section view of a gas quenching cell likely to be used according to the present invention.
- the cell comprises an enclosure 10 of general cylindrical or parallelepipedal shape with a horizontal axis.
- the cell is closed at one end while the other end comprises a guillotine door system 12 providing access to the cell to introduce into it or extract from it a load to be processed 14 .
- door 12 enables tightly closing the quenching cell.
- Load 14 is maintained substantially at the center of the cell on a plate 16 .
- the upper cell portion is provided with two external motors with a vertical axis 18 , arranged next to each other in the longitudinal cell direction.
- Such motors drive respective stirring elements 20 inside of the cell.
- motors 18 are electric motors.
- the cell is provided with an exchanger 22 arranged on either side of load 14 in a horizontal plane.
- Exchanger 22 comprises a cooling fluid circulation duct and is capable of cooling the quenching gas flowing therethrough.
- guiding plates 24 which join stirring devices 20 to direct the gas flow generated by the latter between load 14 and exchanger 22 .
- the quenching gas flows, for example, downwards through load 14 and upwards through exchanger 22 .
- stirring elements 20 are turbines or ventilators.
- the quenching gas is, for example, nitrogen or a mixture of carbon dioxide and helium.
- the present invention consists of controllably modifying the quenching gas circulation speed at the level of load 14 in a quenching operation.
- quenching cell 18 is equipped with a speed variation system.
- the speed variation may be obtained via a frequency variator for electric motors.
- motors 18 are hydraulic motors, a system of variation of the oil flow supplying motors 18 may be provided.
- the elaboration of a speed profile of the quenching gas flowing at the level of load 14 is obtained from a characteristic parameter representative of the average temperature at the level of load 14 .
- the characteristic parameter corresponds to the cooling fluid temperature at the level of the exit of exchanger 22 , that is, when the temperature of the cooling fluid flowing through exchanger 22 is highest.
- the curve representative of the cooling fluid temperature variation at the exit of exchanger 22 is characteristic of the power taken from load 14 .
- FIG. 2 illustrates the principle underlying the selection of the cooling fluid temperature at the exit of exchanger 22 as a characteristic parameter to vary the quenching gas circulation speed.
- FIG. 2 shows a conventional embodiment of a curve 26 of variation of the quenching gas speed at the level of load 14 , in which the quenching gas flow speed is constant and corresponds to the maximum of the capacities of motors 18 .
- FIG. 2 also shows a curve 30 of the variation of the quenching fluid temperature at the exit of exchanger 22 obtained for such a speed profile.
- Curve 30 comprises an ascending portion 32 deviating at the level of a highest point 34 and followed by a descending portion 36 .
- the applicant has shown that the austenite-martensite transformation of the steel forming load 14 substantially occurs at the level of highest point 34 of curve 30 .
- the applicant has shown that an improvement of the fatigue strength may be obtained by limiting the temperature variations of load 14 in the austenite-to-martensite transformation to enable the austenite-to-martensite transition to occur at relatively homogenous temperatures of load 14 .
- FIG. 3 shows a curve 40 representative of the variation of the quenching gas flow speed at the level of load 14 for a first example of a quenching method according to the present invention and a curve 42 representative of the temperature variation of the cooling fluid of exchanger 22 corresponding to such a quenching gas speed profile.
- curve 30 of variation of the cooling fluid temperature for a quenching gas flowing at maximum speed for the entire quenching operation has been reproduced in dotted lines.
- the first quenching method consists of controlling motors 18 so that the quenching gas flow speed at the level of load 14 successively corresponds to a first maximum speed plateau 42 for a time T 1 , to an intermediary speed plateau 44 for a time T 2 , and to a second maximum speed plateau 46 until the end of the quenching operation.
- motors 18 are controlled so that the quenching gas flow speed drops by 30 to 60% with respect to the maximum speed.
- curve 42 of variation of the cooling fluid temperature comprises an ascending portion 48 which substantially follows that of curve 30 .
- the intermediary speed plateau 44 the cooling fluid temperature tends to stabilize so that curve 40 comprises a portion of small variations 50 .
- curve 42 follows a descending portion 52 .
- first maximum speed plateau 42 to intermediary speed plateau 44 is performed when the cooling fluid temperature reaches a first given threshold temperature, which corresponds to a temperature slightly lower than the temperature at highest point 34 of curve 30 . It thus substantially is the cooling fluid temperature for which the austenite-to-martensite transformation of load 14 starts.
- the transition from intermediary speed plateau 44 to second maximum speed plateau 46 is performed when the cooling fluid temperature, towards the end of low variation portion 50 , decreases beyond a second given threshold temperature, for example, equal to the first given threshold temperature, and which is representative of the fact that the austenite-to-martensite transformation of load 14 is over.
- the austenite-to-martensite transformation of load 14 is then totally performed for a quenching gas flow speed smaller than the maximum value.
- the intermediary speed is adjusted to a value such that the thermal power recovered by exchanger 22 corresponds to the thermal power released by load 14 during the austenite-to-martensite transformation, which is an exothermic reaction.
- the temperature of load 14 is then maintained at a substantially constant and homogenous temperature during the entire austenite-to-martensite transformation of the entire load 14 .
- the intermediary speed is adapted to obtain as constant as possible a temperature of the cooling fluid during portion 50 .
- the static pressure of the quenching gas may be maintained at a constant value for the entire quenching operation, between 4 and 20 bars.
- the static pressure of the quenching gas in the quenching cell is decreased on application of the intermediary speed plateau in a range from 30% to 80% of the static quenching gas pressure during the first and second maximum speed plateaus. This enables controlling, in combination with the intermediary quenching gas speed, the thermal power recovered at load 14 during the austenite-to-martensite transformation.
- FIG. 4 shows two curves 54 , 56 of variation of the temperature measured at the level of load 14 during a quenching operation of load 14 respectively for a conventional quenching method for which the quenching gas flow speed remains constant and maximum and the first example of a quenching method according to the present invention. More specifically, curve 56 has been obtained in the case where duration T 1 of application of first maximum speed plateau 42 is of 50 seconds and duration T 2 of intermediary speed plateau 44 is 310 seconds. The intermediary speed corresponds, in the present example, to 30% of the maximum speed.
- the static pressure of the quenching gas which is, in the present example, nitrogen, is 16 bars during the first and second maximum speed plateaus 42 , 46 , and 2 bars during intermediary speed plateau 44 . It should be noted that after 50 seconds, curve 56 decreases much less than curve 54 .
- the temperature variation of load 14 is thus limited during the austenite-to-martensite transformation.
- the applicant has shown an improvement of the fatigue strength of the parts forming load 14 quenched according to the first example of quenching method of the present invention. An explanation would be that since the austenite-to-martensite transformation occurs at temperatures with limited variations, much less internal mechanical stress appears in load 14 , whereby the fatigue strength is improved.
- the applicant has shown an increase in the fatigue strength on the order of 20% with respect to a cold oil quenching (oil at 60° C.) or a nitrogen quenching at constant pressure (16 bars) and at maximum quenching gas flow speed.
- the first and second threshold temperatures depend on many parameters, especially on the type of steel forming load 14 and on the area of the exchange surface between load 14 and the quenching gas.
- the first and second threshold temperatures may be determined by quenching load 14 with a maximum gas flow speed to determine curve 30 shown in FIG. 2 associated with load 14 .
- the first and second threshold temperatures then correspond to a given percentage of the maximum temperature of curve 30 .
- the first example of the method of the present invention can then be implemented for a same load type by providing a temperature sensor at the level of the exit of exchanger 22 connected to a microcontroller capable of controlling motors 18 .
- first maximum speed plateau 42 to intermediary speed plateau 44 and from intermediary speed plateau 44 to second maximum speed plateau 46 are respectively performed when the cooling fluid temperature exceeds the first threshold temperature and decreases below the second threshold temperature.
- time T 1 required for the cooling fluid temperature to reach the first threshold temperature can be determined. It is then not necessary, in normal operation, to provide a temperature sensor at the level of exchanger 22 , the transition from first maximum speed plateau 42 to intermediary speed plateau 44 being automatically performed at the end of time T 1 .
- the transition from intermediary speed plateau 44 to second maximum speed plateau 46 can then be automatically performed at the end of time T 2 , determined, for example, empirically.
- the present invention also provides a second example of a quenching method of a load 14 enabling reducing the deformations of load 14 during the quenching operation, especially local deformations of the load when said load comprises parts of complex shapes. This enables limiting the subsequent rectification steps to be provided for the quenched parts and/or simplifying the previous steps of design of the part shapes before quenching.
- FIG. 5 shows a curve 58 representative of the variation of the quenching gas flow speed at the level of load 14 for the second example of quenching method according to the present invention and a curve 60 representative of the temperature variation of the cooling fluid of exchanger 22 obtained with such a quenching gas speed profile.
- curve 30 of variation of the quenching fluid temperature has been reproduced for a quenching gas flowing at maximum speed for the entire quenching operation.
- the second embodiment of the quenching method of the present invention consists of controlling motors 18 so that the quenching gas flow speed at the level of load 14 successively corresponds to a first intermediary speed plateau 62 for a duration T 1 ′ and to a second maximum speed plateau 64 on to the end of the quenching operation.
- motors 18 are controlled so that the quenching gas speed varies between 0% and 70% of the maximum speed.
- curve 60 of variation of the cooling fluid temperature comprises an ascending portion 66 less marked than ascending portion 32 of curve 30 . The cooling fluid temperature thus increases slower than in the case where the quenching speed is maximum.
- Time T 1 ′ may extend from 5 to 30 seconds according to the total duration of the quenching operation. Further, duration T 1 ′ may be determined empirically.
- the cooling speed of load 14 is smaller than that which would result from a maximum quenching gas flow speed. Since the cooling is slower, the deformations of load 14 are less significant.
- the mechanical inertia of load 14 has increased. Such an increase in the mechanical inertia limits subsequent deformations of load 14 when the quenching gas flow speed increases back again.
- the local deformations of load 14 in the quenching operation, are thus globally reduced since the cooling of load 14 with the maximum quenching gas flow speed is performed when the load has already acquired a sufficient mechanical inertia and thus opposes a resistance greater than the deformations.
- the static pressure of the quenching gas may be maintained constant for the entire quenching operation.
- an increase in the static pressure of the quenching gas may be provided in the transition from intermediary speed plateau 62 to maximum speed plateau 64 .
- the static pressure may be increased by from 2 to 5 times the initial pressure to reach a value, for example, between 4 and 20 bars.
- a load 14 comprising wheels with helical teeth formed of a 15CrM6 type steel
- the applicant has shown a reduction of the deformations at the level of the tooth profile in a plane perpendicular to the helix direction, likely to reach approximately 45% with respect to a hot oil quenching (oil at 180° C.) and approximately 30% with respect to a gas quenching at maximum quenching gas flow speed.
- the present invention also provides a third example of a method for quenching a load 14 corresponding to the combination of the two previously-described examples of embodiment.
- the third example of embodiment thus enables obtaining an improvement of the fatigue strength of the parts forming the load and a reduction in the deformations of the parts forming load 14 .
- FIG. 6 shows a curve 72 representative of the variation of the quenching gas flow speed at the level of load 14 for the third example of a quenching method according to the present invention and a curve 74 representative of the temperature variation of the cooling fluid of exchanger 22 obtained with such a quenching gas speed profile.
- curve 30 of variation of the cooling fluid temperature has been shown in dotted lines for a quenching gas flowing at maximum speed for the entire quenching operation.
- the third example of embodiment of the quenching method of the present invention consists of controlling motors 18 so that the quenching gas flow speed at the level of load 14 successively corresponds to an intermediary speed plateau 76 for a time T 1 ′′, a maximum speed plateau 78 for a time T 2 ′′, an intermediary speed plateau 80 for a time T 3 ′′, and a maximum speed plateau 82 until the end of the quenching operation.
- motors 18 are controlled so that the quenching gas flow speed varies between 0% and 70% of the maximum speed and that, during intermediary speed plateau 80 , the quenching gas flow speed varies between 40% and 70% of the maximum speed.
- curve 74 of the variation of the cooling fluid temperature comprises an ascending portion 84 less marked than ascending portion 32 of curve 30 .
- curve 74 comprises an ascending portion 86 more strongly marked than ascending portion 84 .
- curve 74 comprises a small variation plateau 88 and during maximum speed plateau 82 , curve 74 comprises a descending portion 90 .
- the quenching cell may be different from the previously-described cell.
- the axis of motors 18 may be arranged horizontally, the quenching gas flow at the level of load 14 occurring substantially horizontally.
- the cell may comprise a duct forming a loop outside of the cell, exchanger 22 being inserted in the duct.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Control Of Heat Treatment Processes (AREA)
- Furnace Details (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0550134A FR2880898B1 (fr) | 2005-01-17 | 2005-01-17 | Cellule de trempe au gaz pour pieces en acier |
FR05/50134 | 2005-01-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20060157169A1 true US20060157169A1 (en) | 2006-07-20 |
Family
ID=34953723
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/109,429 Abandoned US20060157169A1 (en) | 2005-01-17 | 2005-04-19 | Gas quenching cell for steel parts |
Country Status (10)
Country | Link |
---|---|
US (1) | US20060157169A1 (de) |
EP (1) | EP1844169B1 (de) |
JP (1) | JP5638737B2 (de) |
KR (1) | KR20070099648A (de) |
CN (1) | CN101107368A (de) |
BR (1) | BRPI0606652B1 (de) |
CA (1) | CA2595020A1 (de) |
FR (1) | FR2880898B1 (de) |
MX (1) | MX2007008652A (de) |
WO (1) | WO2006075120A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10370734B2 (en) * | 2013-10-11 | 2019-08-06 | Mitsubishi Hitachi Power Systems, Ltd. | Method for heat treatment of stainless member, and method for producing forged stainless product |
CN111575460A (zh) * | 2020-07-02 | 2020-08-25 | 武汉轻工大学 | 一种热处理冷却装置 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE0801263L (sv) * | 2007-05-29 | 2008-11-30 | Indexator Ab | Metod & arbetsstycke |
JP4916545B2 (ja) * | 2009-12-21 | 2012-04-11 | エジソンハード株式会社 | 熱処理装置 |
CN112556426B (zh) * | 2020-12-15 | 2022-08-23 | 江西科技学院 | 一种具有气相淬火功能的烧结炉及其淬火工艺 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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US3224910A (en) * | 1963-02-18 | 1965-12-21 | Monsanto Co | Quenching process |
US4610435A (en) * | 1983-12-23 | 1986-09-09 | Ipsen Industries International Gmbh | Industrial furnace for the thermal treatment of metal workpieces |
US5478985A (en) * | 1993-09-20 | 1995-12-26 | Surface Combustion, Inc. | Heat treat furnace with multi-bar high convective gas quench |
US6216358B1 (en) * | 1998-05-29 | 2001-04-17 | Etudes Et Constructions Mecaniques | Gas-quenching cell |
US6554926B2 (en) * | 1999-12-17 | 2003-04-29 | The Boc Group, Plc | Quenching heated metallic objects |
US6554922B2 (en) * | 2000-06-19 | 2003-04-29 | Ald Vacuum Technologies Ag | Method and apparatus for determining the cooling action of a flowing gas atmosphere on workpieces |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63149313A (ja) * | 1986-12-12 | 1988-06-22 | Daido Steel Co Ltd | ガス焼入炉 |
DE4004295A1 (de) * | 1990-02-13 | 1991-08-14 | Karl Heess Gmbh & Co | Verfahren und vorrichtung zum haerten von werkstuecken mittels presswerkzeugen |
DE4135313A1 (de) * | 1991-10-25 | 1993-04-29 | Ipsen Ind Int Gmbh | Verfahren zum abkuehlen einer werkstueckcharge innerhalb eines waermebehandlungsprozesses |
JP3289949B2 (ja) * | 1992-04-27 | 2002-06-10 | パーカー熱処理工業株式会社 | 密閉循環式ガス焼入装置及びガス焼入方法 |
JPH1081913A (ja) * | 1996-09-06 | 1998-03-31 | Ishikawajima Harima Heavy Ind Co Ltd | ガス冷却による等温焼き入れ装置 |
JP2000129341A (ja) * | 1998-10-20 | 2000-05-09 | Toyota Motor Corp | 低歪み焼入れ方法 |
JP2002249819A (ja) * | 2001-02-22 | 2002-09-06 | Chugai Ro Co Ltd | 金属材料のガス冷却方法 |
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2005
- 2005-01-17 FR FR0550134A patent/FR2880898B1/fr not_active Expired - Fee Related
- 2005-04-19 US US11/109,429 patent/US20060157169A1/en not_active Abandoned
-
2006
- 2006-01-16 JP JP2007550823A patent/JP5638737B2/ja active Active
- 2006-01-16 CA CA002595020A patent/CA2595020A1/en not_active Abandoned
- 2006-01-16 CN CNA2006800024423A patent/CN101107368A/zh active Pending
- 2006-01-16 EP EP06709405.2A patent/EP1844169B1/de active Active
- 2006-01-16 KR KR1020077018766A patent/KR20070099648A/ko not_active Application Discontinuation
- 2006-01-16 MX MX2007008652A patent/MX2007008652A/es active IP Right Grant
- 2006-01-16 WO PCT/FR2006/050017 patent/WO2006075120A1/fr active Application Filing
- 2006-01-16 BR BRPI0606652-6A patent/BRPI0606652B1/pt active IP Right Grant
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US3224910A (en) * | 1963-02-18 | 1965-12-21 | Monsanto Co | Quenching process |
US4610435A (en) * | 1983-12-23 | 1986-09-09 | Ipsen Industries International Gmbh | Industrial furnace for the thermal treatment of metal workpieces |
US5478985A (en) * | 1993-09-20 | 1995-12-26 | Surface Combustion, Inc. | Heat treat furnace with multi-bar high convective gas quench |
US5550858A (en) * | 1993-09-20 | 1996-08-27 | Surface Combustion, Inc. | Heat treat furnace with multi-bar high convective gas quench |
US6216358B1 (en) * | 1998-05-29 | 2001-04-17 | Etudes Et Constructions Mecaniques | Gas-quenching cell |
US6554926B2 (en) * | 1999-12-17 | 2003-04-29 | The Boc Group, Plc | Quenching heated metallic objects |
US6554922B2 (en) * | 2000-06-19 | 2003-04-29 | Ald Vacuum Technologies Ag | Method and apparatus for determining the cooling action of a flowing gas atmosphere on workpieces |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10370734B2 (en) * | 2013-10-11 | 2019-08-06 | Mitsubishi Hitachi Power Systems, Ltd. | Method for heat treatment of stainless member, and method for producing forged stainless product |
CN111575460A (zh) * | 2020-07-02 | 2020-08-25 | 武汉轻工大学 | 一种热处理冷却装置 |
Also Published As
Publication number | Publication date |
---|---|
WO2006075120A1 (fr) | 2006-07-20 |
BRPI0606652B1 (pt) | 2015-06-02 |
EP1844169B1 (de) | 2019-04-24 |
JP2008527176A (ja) | 2008-07-24 |
EP1844169A1 (de) | 2007-10-17 |
CN101107368A (zh) | 2008-01-16 |
JP5638737B2 (ja) | 2014-12-10 |
MX2007008652A (es) | 2007-10-18 |
BRPI0606652A2 (pt) | 2009-07-07 |
FR2880898B1 (fr) | 2007-05-11 |
CA2595020A1 (en) | 2006-07-20 |
FR2880898A1 (fr) | 2006-07-21 |
KR20070099648A (ko) | 2007-10-09 |
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