CN211451845U - Isothermal hot compression device for high-temperature alloy - Google Patents
Isothermal hot compression device for high-temperature alloy Download PDFInfo
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- CN211451845U CN211451845U CN202020106829.0U CN202020106829U CN211451845U CN 211451845 U CN211451845 U CN 211451845U CN 202020106829 U CN202020106829 U CN 202020106829U CN 211451845 U CN211451845 U CN 211451845U
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Abstract
The utility model provides a device for isothermal hot compression of high-temperature alloy, which comprises a pressure rod and a high-temperature furnace for isothermal heating of a sample and the pressure rod, wherein the pressure rod comprises an upper pressure rod and a lower pressure rod which are respectively positioned right above and right below the sample, and the sample is subjected to isothermal hot compression in the high-temperature furnace through the upper pressure rod and the lower pressure rod; the high temperature furnace includes furnace and the second temperature measurement piece that is located furnace, be equipped with in the furnace and be used for going up the depression bar and carry out the last heating group that heats, be used for carrying out the middle heating group that heats and be used for carrying out the lower heating group that heats to the depression bar down on the depression bar and sample department all set up the second temperature measurement piece, realize the isothermal heating to last depression bar, depression bar and sample through the cooperation between three heating group and the second temperature measurement piece that corresponds separately, reduce the cold junction effect through setting up three district's accuse temperature.
Description
Technical Field
The utility model relates to a hot compression experiment technical field, concretely relates to be used for high temperature alloy isothermal hot compression device.
Background
The high-temperature alloy is a metal material which takes iron, nickel and cobalt as the base and can work for a long time at a high temperature of more than 600 ℃ under the action of certain stress. When the evolution conditions of alloy microstructures under different strains are researched, the double-cone frustum sample is compressed once by adopting a high-flux method so as to obtain different strain values, and the temperature uniformity of the sample is particularly important for ensuring the accuracy of an experimental result.
In the prior art, a heat compression experiment is generally carried out on a Gleeble thermal simulation testing machine, and in the method, a sample heating mode is resistance heat generation, namely, a metal sample is electrified to generate heat by taking the metal sample as a resistor. But the temperature of the pressure rod and the sample have larger temperature difference, the cold end effect is obvious, and the Gleeble thermal simulation testing machine has larger operation difficulty and needs professional operation training.
Chinese patent CN 101773979B proposes a heating device suitable for a dynamic isothermal forging die, which uses an upper heating furnace and a lower heating furnace to heat an upper die and a lower die respectively, so as to ensure that the die keeps high temperature, thereby implementing isothermal forging. The heat of the upper heating furnace and the lower heating furnace is adopted for heating the sample, but the upper heating furnace and the lower heating furnace are not integrated and have a distance, so the sample has certain heat loss; in addition, a certain distance exists between the upper heating furnace and the sample, and the temperature difference exists between the sample and the heating furnace, so that the heating temperature of the sample cannot be accurately controlled.
In view of the above, there is a need for an isothermal hot compression apparatus for high temperature alloys to solve the problems in the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a be used for superalloy isothermal hot compression device, concrete technical scheme as follows:
the device for isothermal hot compression of the high-temperature alloy comprises a pressure lever for applying pressure to a sample and a high-temperature furnace for carrying out isothermal heating on the sample and the pressure lever, wherein the pressure lever comprises an upper pressure lever and a lower pressure lever which are respectively positioned right above and right below the sample, and the sample is subjected to isothermal hot compression in the high-temperature furnace through the upper pressure lever and the lower pressure lever;
the high-temperature furnace comprises a hearth and a second temperature measuring piece located in the hearth, an upper heating group used for heating the upper pressure rod, a middle heating group used for heating the sample and a lower heating group used for heating the lower pressure rod are arranged in the hearth, the second temperature measuring piece is arranged on the upper pressure rod, the lower pressure rod and the sample, and the isothermal heating of the upper pressure rod, the lower pressure rod and the sample is realized through the cooperation between the three heating groups and the corresponding second temperature measuring pieces.
The temperature difference relationship between the heating sheet of the upper heating group and the upper pressure rod, between the heating sheet of the middle heating group and the sample and between the heating sheet of the lower heating group and the lower pressure rod is respectively obtained through the matching of the corresponding second temperature measuring piece and the first temperature measuring piece, the heating temperature of the upper pressure rod, between the heating sheet of the middle heating group and the sample and between the heating sheet of the lower heating group and the temperature difference relationship between the lower pressure rod are respectively set through the corresponding temperature difference relationship, and the isothermal heating of the upper pressure rod, the sample and the lower pressure rod is realized.
Preferably, in the above technical solution, the high temperature furnace further includes a heat insulation plate and a heating plate protection plate, the heat insulation plate is disposed between the heating plate of the upper heating group and the heating plate of the middle heating group, and between the heating plate of the middle heating group and the heating plate of the lower heating group, and the heat insulation plate divides the furnace chamber into three heating regions;
heating plate protection plates are arranged between the heating plate of the upper heating group and the upper pressure rod, between the heating plate of the middle heating group and the sample, and between the heating plate of the lower heating group and the lower pressure rod.
Preferably, a plurality of heating sheets in a single heating group are connected in series, and an upper heating group, a middle heating group and a lower heating group are connected in parallel, so that the heating temperatures of an upper pressure rod, a lower pressure rod and a sample are respectively controlled.
Preferably, in the above technical scheme, the high-temperature furnace further comprises a furnace body, the furnace body comprises a left furnace body and a right furnace body, the hearth is a space formed by closing a left hearth body and a right hearth body, the left hearth body is arranged on the left furnace body to form a left heating furnace, the right hearth body is arranged on the right furnace body to form a right heating furnace, and the left heating furnace and the right heating furnace are butted to form a complete high-temperature furnace;
the upper heating group, the middle heating group and the lower heating group respectively comprise two heating sheets, and the two heating sheets in a single heating group are respectively arranged on the left hearth body and the right hearth body;
the left hearth body and the right hearth body are respectively provided with a heat insulation plate, and the hearth is divided into three heating areas through the heat insulation plates after the left hearth body and the right hearth body are butted;
and heating plate protection plates are arranged on the left hearth body and the right hearth body.
Preferably in the above technical scheme, the left hearth body and the right hearth body both include a hearth body, a hearth upper cover arranged at the top end of the hearth body, and a hearth bottom plate arranged at the bottom end of the hearth body.
The furnace body comprises a left furnace body and a right furnace body, wherein the left furnace body is provided with a movable part, the right furnace body is provided with a lock catch, the left furnace body is provided with a fixed part, and the left heating furnace and the right heating furnace are in butt joint through the cooperation of the rotating device and the lock catch.
The preferable in the technical scheme further comprises a hydraulic press, the upper pressing rod and the lower pressing rod are connected with the hydraulic press through a wedge-shaped clamping block, the wedge-shaped clamping block is connected with a circulating cooling water path to cool the wedge-shaped clamping block, and the high-temperature furnace is arranged on the hydraulic press through a support.
Preferably, the temperature measuring device further comprises a control cabinet, and the first temperature measuring part, the second temperature measuring part, the upper heating group, the middle heating group and the lower heating group are all connected with the control cabinet;
the surface of the test sample, which is in contact with the pressure rod, is sequentially provided with boron nitride, a first mica sheet and a second mica sheet; the sample is in a double-cone structure;
set up the heat preservation ring between high temperature furnace and last depression bar and between high temperature furnace and depression bar, the heat preservation ring is including the heat preservation ring monomer that the symmetry set up, the heat preservation ring monomer includes semicircle ring base member and magnetic part, the magnetic part sets up in the bottom of semicircle ring base member, realizes through the magnetic part that the heat preservation ring monomer adsorbs on the high temperature furnace.
Use the technical scheme of the utility model, following beneficial effect has:
(1) the utility model discloses an isothermal thermal compression device high temperature furnace sets up and heats the group, middle heating group and lower heating group realize respectively to last depression bar, sample and depression bar heat down, simultaneously on last depression bar, the sample is in place and all set up the second temperature measurement piece on the depression bar down and carry out temperature detection, can obtain the depression bar, the temperature of sample and depression bar down, adjust the heating group realization depression bar that corresponds, sample and depression bar isothermal down, realize carrying out isothermal thermal compression to the sample through three district's accuse temperature, reduce the cold junction effect, promote the accuracy of experiment.
(2) The utility model discloses an isothermal hot compression device is at last heating group, middle heating group and lower heating group department all set up first temperature measurement spare, can directly obtain the temperature of heating plate, cooperation second temperature measurement spare can obtain between the heating plate of heating group and last depression bar, the difference in temperature relation between the heating plate of middle heating group and sample and heating plate of heating group and depression bar down, effectual solution corresponds the heating plate and last depression bar of group, there is the condition that the distance leads to the test temperature error that sets up temperature and sample of heating plate between sample and the depression bar down, the depression bar can be realized accurate settlement through the cooperation of first temperature measurement spare and second temperature measurement spare, the temperature of sample and depression bar down, prevent to go up the depression bar, there is the condition that the difference in temperature leads to the cold junction effect between sample and the depression bar.
(3) The utility model discloses an isothermal hot compression device still includes the heat insulating board, the heat insulating board sets up between the heating plate of last heating group and the heating plate of middle heating group and between the heating plate of middle heating group and the heating plate of lower heating group, divides into three heating region with furnace through the heat insulating board. The heat insulation plate is arranged, so that radiation influence between the heating sheets can be prevented, accurate temperature control of the upper pressing rod, the sample and the lower pressing rod is realized, and the precision of experimental data is improved.
(4) The utility model discloses an adopt series connection between the many heating plates that heat group, middle heating group and lower heating group on the isothermal hot compression device, go up and heat group, middle heating group and adopt parallel connection between the lower heating group to the realization is controlled the heating temperature of depression bar, lower depression bar and sample respectively, thereby realizes going up depression bar, sample and lower depression bar adjustment to the isothermal, reduces the cold junction effect.
(5) In the isothermal hot compression device of the utility model, the left hearth body and the right hearth body both comprise a hearth body, a hearth upper cover arranged at the top end of the hearth body and a hearth bottom plate arranged at the bottom end of the hearth body; the left-side hearth body (or the right-side hearth body) is built by the hearth body, the hearth upper cover and the hearth bottom plate, a certain lap joint gap exists, and the left-side hearth body or the right-side hearth body can be prevented from cracking due to expansion with heat and contraction with cold.
(6) The utility model discloses an isothermal hot compression device includes rotary device and hasp, realizes left side heating furnace and right side heating furnace butt joint through rotary device, realizes locking through the hasp and prevents that the heat scatters and disappears.
(7) The utility model discloses a wedge clamp splice connection circulative cooling water route realizes cooling down the wedge clamp splice among the isothermal hot compression device, realizes reducing wedge clamp splice temperature, ensures experimental facilities safety.
(8) The utility model discloses an experiment sample adopts two circular cone platform structures, and after the hot compression, its compression cross section center can produce obvious strain gradient to the edge, can obtain multiunit strain data through a sample, has avoided the error that causes by the experimental conditions difference from this, application high flux experimental method that can be better, and compression cross section strain range should be great, and compression stroke load should be less simultaneously.
(9) The utility model is provided with boron nitride, a first mica sheet and a second mica sheet in sequence on the contact surface of the sample and the pressure bar; the boron nitride has the demolding effect, so that the sample can be prevented from being adhered to the end face of the compression bar, and the sampling is facilitated; the first mica sheet can play a role in heat insulation, so that the heat conduction effect of the test sample on the pressure rod is reduced, and the cold end effect is further reduced; the second mica sheet is used for lubricating and reducing the friction of the end face of the sample.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
fig. 1 is a schematic view of the overall structure of the isothermal thermal compression apparatus of the present invention;
FIG. 2 is a schematic view of the structure of the high temperature furnace of FIG. 1;
FIG. 3 is a schematic view of the right-hand hearth structure of FIG. 2;
FIG. 4 is a schematic view of the furnace of FIG. 2 open prior to testing;
FIG. 5 is a schematic close-up view of the high temperature furnace of FIG. 2 during an experiment;
FIG. 6 is a schematic view of the heat retaining ring of FIG. 5;
FIG. 7 is a schematic diagram illustrating the principle of the sample of the present invention in the thermal compression experiment;
fig. 8 is a schematic structural view of the sample of the present invention;
fig. 9 is a schematic structural view of the circulation cooling water path of the present invention;
the device comprises a sample 1, a sample 2, a hydraulic machine 3, a wedge-shaped clamping block 4, a pressure rod 5, a high-temperature furnace 5.1, a heating sheet 5.2, a heat insulation plate 5.3, a hearth 5.31, a hearth upper cover 5.32, a hearth body 5.33, a hearth bottom plate 5.4, a lock catch 5.5, a first temperature measuring piece 5.6, a furnace body 5.7, a rotating device 5.8, a heating sheet protection plate 6, a support 7, a circulating cooling water channel 7.1, a circulating cooling water pipe 7.2, a cooling water pipe fixing device 7.3, a temperature measuring instrument 7.4, a flow controller 8, a control cabinet 9, a second temperature measuring piece 10, a heat insulation ring 10.1, a semicircular ring base 10.2 and a magnet.
Detailed Description
The embodiments of the invention will be described in detail hereinafter with reference to the accompanying drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Example 1:
referring to fig. 1-9, a device for isothermal hot compression of a high-temperature alloy comprises a pressure bar 4 for applying pressure to a sample and a high-temperature furnace 5 for isothermal heating of the sample 1 and the pressure bar 4, wherein the pressure bar 4 comprises an upper pressure bar and a lower pressure bar which are respectively positioned right above and right below the sample, and the sample 1 is subjected to isothermal hot compression in the high-temperature furnace through the upper pressure bar and the lower pressure bar; in the embodiment, the pressure rod is formed by hot-pressing and sintering silicon carbide and can resist the temperature of about 1600 ℃.
Referring to fig. 2 and 4, the high temperature furnace 5 includes a furnace 5.3 and a second temperature measurement component 9 located in the furnace 5.3, an upper heating group for heating the upper pressure rod, a middle heating group for heating the sample 1, and a lower heating group for heating the lower pressure rod are provided in the furnace 5.3, the second temperature measurement components 9 are provided on the upper pressure rod, the lower pressure rod, and at the sample, and isothermal heating (respectively controlling the temperatures of the upper pressure rod, the sample, and the lower pressure rod, i.e., three-zone temperature control) is performed on the upper pressure rod, the lower pressure rod, and the sample 1 by the cooperation of the upper heating group and the second temperature measurement component 9 on the upper pressure rod, the cooperation of the middle heating group and the second temperature measurement component 9 on the sample, and the cooperation of the lower heating group and the second temperature measurement component 9 on the lower pressure rod, thereby implementing isothermal heating of the sample 1, see fig. 7.
Referring to fig. 4, a second temperature measuring part 9 for detecting the temperature of the upper pressure lever is directly arranged on the upper pressure lever to detect the temperature of the upper pressure lever;
the second temperature measuring piece 9 for detecting the temperature of the sample 1 is arranged at the sample through the upper pressure rod, namely near the sample, and the temperature measured by the second temperature measuring piece can be regarded as the temperature of the sample because the distance between the second temperature measuring piece and the sample is very close;
the second temperature measuring part for detecting the temperature of the lower pressing rod is directly arranged on the lower pressing rod to detect the temperature of the lower pressing rod.
Referring to fig. 2, the high temperature furnace further includes a first temperature measuring member 5.5, the upper heating group, the middle heating group and the lower heating group each include at least one heating sheet 5.1, the upper heating group, the middle heating group and the lower heating group are respectively provided with the first temperature measuring member 5.5 at the heating sheet 5.1, the temperatures of the heating sheets 5.1 in the upper heating group, the middle heating group and the lower heating group are respectively and correspondingly detected through the first temperature measuring member 5.5, the temperature difference relations between the heating sheet 5.1 of the upper heating group and the upper compression bar, between the heating sheet 5.1 of the middle heating group and the sample and between the heating sheet 5.1 of the lower heating group and the lower compression bar are respectively obtained through the corresponding second temperature measuring member 9 and the first temperature measuring member 5.5, and the temperature difference relations between the heating sheets 5.1 of the upper heating group and the upper compression bar, between the heating sheet 5.1 of the middle heating group and the lower compression bar are respectively matched, and the heating temperatures of the upper compression bar, the.
The temperature difference relation is equal to the temperature value measured by the corresponding second temperature measuring part 9 minus the temperature value measured by the first temperature measuring part 5.5, so that the set values, namely the input values, of the upper heating group, the middle heating group and the lower heating group can be directly obtained through the corresponding temperature difference relation and the required test temperature (namely the heating temperature) of the sample.
Because the distance between the first temperature measurement piece and the second temperature measurement piece in each group can not change in the actual test process, the corresponding temperature difference relation is also certain, the corresponding temperature difference relation can be made into a table or a graph in the actual test process, an input value can be directly obtained according to the test temperature and the table (or the graph) required by the sample, and the test efficiency is conveniently improved.
The high-temperature furnace further comprises a heat insulation plate 5.2 and a heating sheet protection plate 5.8, the heat insulation plate 5.2 is arranged between the heating sheet 5.1 of the upper heating group and the heating sheet 5.1 of the middle heating group and between the heating sheet 5.1 of the middle heating group and the heating sheet 5.1 of the lower heating group, and the hearth 5.3 is divided into three heating regions through the heat insulation plate 5.2.
Referring to fig. 3, heating plate protection plates 5.8 are arranged between the heating plate 5.1 of the upper heating set and the upper pressure rod, between the heating plate 5.1 of the middle heating set and the sample 1, and between the heating plate 5.1 of the lower heating set and the lower pressure rod, heat generated by the heating plate is transmitted to the upper pressure rod, the sample and the lower pressure rod through the heating plate protection plates, and the heating plate is protected by the heating plate protection plates.
Preferably, the heating plate protection plate is made of quartz glass. In the actual test process, because the second temperature measurement piece need use the high temperature rope to bind, because the high temperature rope fibre scatters easily, when it and heating plate contact, easily causes the heating plate to damage, sets up the heating plate protection shield and can keep apart high temperature rope and heating plate, plays the effect of protection heating plate. Preferably, the maximum temperature rise of the heating sheet in the embodiment can reach 1400 ℃, and the temperature rise performance is stable.
In the embodiment, a plurality of heating sheets 5.1 in a single heating group are connected in series, and an upper heating group, a middle heating group and a lower heating group are connected in parallel, so that the heating temperatures of an upper pressure rod, a lower pressure rod and a sample are respectively controlled; namely, the temperature of the upper heating group, the middle heating group and the lower heating group, namely the input temperature, is controlled respectively.
Referring to fig. 2 (the heating plate protection plate is hidden in fig. 2), the high-temperature furnace 5 further comprises a furnace body 5.6, the furnace body 5.6 comprises a left side furnace body and a right side furnace body, the hearth 5.3 is a space formed by closing a left side hearth body and a right side hearth body, and the hearth is made of alumina fiber plates and can resist temperature of about 1800 ℃. The left hearth body is arranged on the left furnace body to form a left heating furnace, the right hearth body is arranged on the right furnace body to form a right heating furnace, and the left heating furnace and the right heating furnace are butted to form a complete high-temperature furnace 5;
preferably, the inner wall of the hearth is arc-shaped, that is, the inner walls of the left hearth body and the right hearth body are arc-shaped, so that the heat reflection efficiency of the inner wall of the hearth can be guaranteed, and the uniformity of the furnace temperature can be improved, as shown in detail in fig. 2-4.
Referring to fig. 2, the upper heating group, the middle heating group and the lower heating group each include two heating plates 5.1, and the two heating plates 5.1 in a single heating group are respectively disposed on the left hearth body and the right hearth body; the two heating plates 5.1 in the upper heating group, the two heating plates 5.1 in the middle heating group and the two heating plates 5.1 in the lower heating group are all symmetrically arranged along the compression direction of the sample 1. The uniform heating can be realized, and the accuracy of experimental data is ensured.
The left hearth body and the right hearth body are both provided with heat insulation plates 5.2, and after the left hearth body and the right hearth body are butted, a hearth 5.3 is divided into three heating areas through the heat insulation plates 5.2; the heat insulation plate 5.2 is an alumina heat insulation plate.
And heating plate protection plates 5.8 are arranged on the left hearth body and the right hearth body.
Referring to fig. 2, in this embodiment, the first temperature measuring member 5.5 is disposed on the right hearth body. Preferably, the first temperature measuring part and the second temperature measuring part are both thermocouples, it should be noted that the first temperature measuring part 5.5 is arranged to penetrate through the right furnace body and the right hearth body, and the temperature of the heating sheets in each group in the right hearth body is tested.
Referring to fig. 3, the left hearth body and the right hearth body both include a hearth body 5.32, a hearth upper cover 5.31 arranged at the top end of the hearth body 5.32, and a hearth bottom plate 5.33 arranged at the bottom end of the hearth body 5.32. The hearth body 5.32, the hearth upper cover 5.31 and the hearth bottom plate 5.33 are all made of aluminum oxide heat insulation plates.
Referring to fig. 2, the high-temperature furnace further comprises a rotating device 5.7 and a lock catch 5.4, the rotating device 5.7 is arranged on the bottom surfaces of the left side furnace body and the right side furnace body, the movable part of the lock catch 5.4 is arranged on the right side furnace body, the fixed part of the lock catch 5.4 is arranged on the left side furnace body, and the left side heating furnace and the right side heating furnace are butted through the cooperation of the rotating device 5.7 and the lock catch 5.4.
The rotating device specifically comprises a base and a hinge, the left furnace body and the right furnace body are correspondingly provided with the base, and the left furnace body and the base and the right furnace body and the base are connected through the hinge, so that the left furnace body and the right furnace body can rotate relative to the base.
Referring to fig. 1, the isothermal hot compression device further comprises a hydraulic press 2, the upper pressing rod and the lower pressing rod are connected with the hydraulic press 2 through a wedge-shaped clamping block 3, the wedge-shaped clamping block 3 is connected with a circulating cooling water path 7 to cool the wedge-shaped clamping block 3, the high-temperature furnace 5 is arranged on the hydraulic press 2 through a support 6, and the high-temperature furnace is arranged on the support 6 through a rotating device.
The wedge-shaped clamping blocks 3 are internally provided with water channels which are connected with a circulating cooling water channel 7 to realize cooling and heat dissipation and protect the hydraulic machine from working normally.
Referring to fig. 9, the circulating cooling water path 7 includes a circulating cooling water pipe 7.1, a cooling water pipe fixing device 7.2, a temperature measuring instrument 7.3 and a flow controller 7.4, the circulating cooling water pipe 7.1 is connected with a water inlet and a water outlet of a water channel inside the wedge-shaped clamping block 3 to form the circulating cooling water path, the cooling water pipe fixing device 7.2 is connected with the circulating cooling water pipe and a hydraulic machine to fix the circulating cooling water pipe, the temperature measuring instrument is connected with the flow controller, the temperature measuring instrument is used for measuring the temperature of the wedge-shaped clamping block, the flow controller is used for controlling the flow of cooling liquid in the circulating cooling water pipe, and the flow of cooling liquid is adjusted according to the temperature measured by the temperature measuring.
The isothermal hot compression device also comprises a control cabinet 8, and the first temperature measuring part 5.5, the second temperature measuring part 9, the upper heating group, the middle heating group and the lower heating group are all connected with the control cabinet 8;
the high-temperature furnace body has simple structure and small size, and is about 370 multiplied by 220 multiplied by 110 mm. The maximum temperature can be raised to 1400 ℃, the long-term use temperature is below 1300 ℃, and the optimal temperature rise rate range is 10-15 ℃/min. 30 sections of program control functions are supported by the control cabinet, and the use requirements of multiple temperature sections can be met.
The surface of the sample 1, which is in contact with the pressure rod, is sequentially provided with boron nitride, a first mica sheet and a second mica sheet; the boron nitride has the demolding effect, so that the sample can be prevented from being adhered to the end face of the compression bar, and the sampling is facilitated; the first mica sheet can play a role in heat insulation, so that the heat conduction effect of the test sample on the pressure rod is reduced, and the cold end effect is further reduced; the second mica sheet is used for lubricating and reducing the friction of the end face of the sample. In the industry, the second mica sheet is replaced by a graphite sheet to realize lubrication, but the graphite sheet has poor lubrication effect at high temperature through experimental tests.
Referring to fig. 8, the sample 1 is a double-truncated cone structure, and a high-flux method can be applied to the double-truncated cone structure to obtain a strain distribution gradient from the center to the edge of a compression section, so that an error of a thermal compression experiment performed on a cylindrical sample in the prior art can be eliminated. The dimensions of the sample are shown in fig. 7, where the dimension a × b × c × d is 6 × 4 × 18 × 16mm, which allows better application of the high throughput experimental method, and the range of the compressive cross-sectional strain should be large, while the compressive stroke load should be small.
Set up heat preservation ring 10 between high temperature furnace and last depression bar and between high temperature furnace and depression bar, heat preservation ring 10 includes the heat preservation ring monomer that the symmetry set up, heat preservation ring monomer includes semicircle ring base member 10.1 and magnetic part, the magnetic part sets up in the bottom of semicircle ring base member 10.1, realizes through the magnetic part that heat preservation ring monomer adsorbs on the high temperature furnace. The semicircular ring substrate is made of flexible aluminum oxide heat-insulating material and can be better tightly attached to the pressure rod. The magnetic element is preferably a magnet 10.2.
The technical scheme of the embodiment is specifically as follows:
the method for carrying out the experiment by using the isothermal hot compression device of the utility model specifically comprises the following steps:
step 1: sequentially arranging boron nitride, a first mica sheet and a second mica sheet on the surface of the sample 1, which is in contact with the pressure rod, arranging the sample on the lower pressure rod, and operating the upper pressure rod to move downwards to clamp the sample;
step 2: the butt joint and closing of the left heating furnace and the right heating furnace are realized through the rotating device, the left heating furnace and the right heating furnace are locked through the lock catch, heat preservation rings 10 are arranged between the high-temperature furnace and the upper pressure rod and between the high-temperature furnace and the lower pressure rod, see the figure 5, and a cooling circulation water path is opened to cool the wedge-shaped clamping block on the hydraulic machine;
and step 3: the temperatures of the upper heating group, the middle heating group and the lower heating group are respectively set according to the temperature difference relations between the heating sheet 5.1 of the upper heating group and the upper pressure rod, between the heating sheet 5.1 of the middle heating group and the sample and between the heating sheet 5.1 of the lower heating group and the lower pressure rod, so that the upper pressure rod, the sample and the lower pressure rod reach the set heating temperature, the upper pressure rod, the sample and the lower pressure rod are isothermal, and the temperature is kept for 8-15 minutes, preferably 10 minutes in the embodiment;
and step 3: controlling the upper pressure rod to press down according to the test speed until the test pressing amount is reached (the test speed and the test pressing amount are determined according to the requirements of the experiment);
and 4, step 4: and controlling the upper pressure rod to release pressure, controlling the lower pressure rod to move downwards to move out of the high-temperature furnace, putting the sample into water for quenching, and finishing the high-flux thermal compression experiment.
Use the technical scheme of the utility model, the effect is:
the utility model discloses an isothermal thermal compression device sets up and heats the group, middle heating group and lower heating group realize respectively to last depression bar, sample and depression bar heat down, simultaneously on last depression bar, the sample is in place and all set up the second temperature measurement piece on the depression bar down and carry out temperature detection, can obtain the depression bar, the temperature of sample and depression bar down, adjust the heating group realization depression bar that corresponds, sample and depression bar isothermal down, thereby realize carrying out isothermal thermal compression to the sample, reduce the cold junction effect through setting up three district's accuse temperature, promote the accuracy of experiment.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The isothermal hot compression device for the high-temperature alloy is characterized by comprising a pressure lever (4) for applying pressure to a sample and a high-temperature furnace (5) for carrying out isothermal heating on the sample (1) and the pressure lever (4), wherein the pressure lever (4) comprises an upper pressure lever and a lower pressure lever which are respectively positioned right above and right below the sample, and the sample (1) is subjected to isothermal hot compression in the high-temperature furnace through the upper pressure lever and the lower pressure lever;
high temperature furnace (5) include furnace (5.3) and be located second temperature measurement spare (9) in furnace (5.3), be equipped with in furnace (5.3) and be used for going up the compression bar and carry out the last heating group that heats, be used for carrying out the middle heating group that heats and be used for carrying out the lower heating group that heats to pushing down the compression bar to sample (1) all set up second temperature measurement spare (9) on the upper and lower compression bar and sample department, realize the isothermal heating to upper compression bar, pushing down bar and sample (1) through the cooperation between three heating group and the second temperature measurement spare that corresponds separately.
2. The isothermal hot compression device for the high-temperature alloy according to claim 1, further comprising a first temperature measuring component (5.5), wherein the upper heating group, the middle heating group and the lower heating group each comprise at least one heating sheet (5.1), the first temperature measuring component (5.5) is disposed at each heating sheet (5.1) of the upper heating group, the middle heating group and the lower heating group, the temperatures of the heating sheets (5.1) in the upper heating group, the middle heating group and the lower heating group are respectively and correspondingly detected through the first temperature measuring component (5.5), the temperature difference relationships between the heating sheet (5.1) and the upper compression bar of the upper heating group, between the heating sheet (5.1) and the sample (1) of the middle heating group and between the heating sheet (5.1) and the lower compression bar of the lower heating group are respectively obtained through the corresponding second temperature measuring component (9) and the first temperature measuring component (5.5), and the temperature difference relationships between the heating sheets (5.1) and the lower compression bar of the upper heating group are accurately set through the corresponding compression bar relationships, The heating temperature of the sample (1) and the lower pressure rod realizes isothermal heating of the upper pressure rod, the sample and the lower pressure rod.
3. The isothermal hot compacting device for superalloys according to claim 2, characterized in that the high temperature furnace (5) further comprises heat insulation plates (5.2) and heat sheet protection plates (5.8), the heat insulation plates (5.2) being arranged between the heat sheets (5.1) of the upper heating group and the heat sheets (5.1) of the middle heating group and between the heat sheets (5.1) of the middle heating group and the heat sheets (5.1) of the lower heating group, the furnace chamber (5.3) being divided into three heating zones by the heat insulation plates (5.2);
and heating plate protection plates (5.8) are arranged between the heating plate (5.1) of the upper heating group and the upper pressing rod, between the heating plate (5.1) of the middle heating group and the sample (1) and between the heating plate (5.1) of the lower heating group and the lower pressing rod.
4. The isothermal hot compacting device for high-temperature alloys according to claim 3, characterized in that the heating sheets (5.1) in a single heating group are connected in series, and the upper heating group, the middle heating group and the lower heating group are connected in parallel, so as to control the heating temperature of the upper pressing rod, the lower pressing rod and the sample.
5. The isothermal hot compression device for high-temperature alloy according to claim 4, wherein the high-temperature furnace (5) further comprises a furnace body (5.6), the furnace body (5.6) comprises a left furnace body and a right furnace body, the hearth (5.3) is a space formed by closing a left hearth body and a right hearth body, the left hearth body is arranged on the left furnace body to form a left heating furnace, the right hearth body is arranged on the right furnace body to form a right heating furnace, and the left heating furnace and the right heating furnace are butted to form the complete high-temperature furnace (5);
the upper heating group, the middle heating group and the lower heating group respectively comprise two heating sheets (5.1), and the two heating sheets (5.1) in a single heating group are respectively arranged on the left hearth body and the right hearth body;
the left hearth body and the right hearth body are both provided with heat insulation plates (5.2), and the hearth (5.3) is divided into three heating areas through the heat insulation plates (5.2) after the left hearth body and the right hearth body are butted;
and heating plate protection plates (5.8) are arranged on the left hearth body and the right hearth body.
6. The isothermal hot compression device for high-temperature alloys according to claim 5, characterized in that the left and right hearth bodies each comprise a hearth body (5.32), a hearth upper cover (5.31) arranged at the top end of the hearth body (5.32), and a hearth bottom plate (5.33) arranged at the bottom end of the hearth body (5.32).
7. The isothermal hot compression device for high-temperature alloy according to claim 6, further comprising a rotating device (5.7) and a lock catch (5.4), wherein the rotating device (5.7) is arranged on the bottom surface of each of the left furnace body and the right furnace body, a movable part of the lock catch (5.4) is arranged on the right furnace body, a fixed part of the lock catch (5.4) is arranged on the left furnace body, and the left heating furnace and the right heating furnace are butted through the cooperation of the rotating device (5.7) and the lock catch (5.4).
8. The isothermal hot compression device for the high-temperature alloy according to claim 7, further comprising a hydraulic machine (2), wherein the upper pressure rod and the lower pressure rod are connected with the hydraulic machine (2) through a wedge-shaped clamping block (3), the wedge-shaped clamping block (3) is connected with a circulating cooling water path (7) to cool the wedge-shaped clamping block (3), and the high-temperature furnace (5) is arranged on the hydraulic machine (2) through a support (6).
9. The isothermal hot compression device for high-temperature alloys according to any one of claims 2 to 8, characterized by further comprising a control cabinet (8), wherein the first temperature measuring part (5.5), the second temperature measuring part (9), the upper heating group, the middle heating group and the lower heating group are all connected with the control cabinet (8);
the surface of the test sample (1) in contact with the pressure rod is sequentially provided with boron nitride, a first mica sheet and a second mica sheet; the sample is in a double-cone structure;
set up heat preservation ring (10) between high temperature furnace and last depression bar and between high temperature furnace and depression bar, heat preservation ring (10) are including the heat preservation ring monomer that the symmetry set up, heat preservation ring monomer includes semicircle ring base member (10.1) and magnetic part, the magnetic part sets up in the bottom of semicircle ring base member (10.1), realizes through the magnetic part that heat preservation ring monomer adsorbs on the high temperature furnace.
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