CN112666202B - Device and method for measuring alloy solidification behavior under different cooling speeds - Google Patents
Device and method for measuring alloy solidification behavior under different cooling speeds Download PDFInfo
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- 238000001816 cooling Methods 0.000 title claims abstract description 109
- 239000000956 alloy Substances 0.000 title claims abstract description 83
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 83
- 238000007711 solidification Methods 0.000 title claims abstract description 62
- 230000008023 solidification Effects 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 28
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 81
- 239000010439 graphite Substances 0.000 claims abstract description 81
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 81
- 239000010425 asbestos Substances 0.000 claims abstract description 39
- 238000001514 detection method Methods 0.000 claims abstract description 39
- 229910052895 riebeckite Inorganic materials 0.000 claims abstract description 39
- 230000006399 behavior Effects 0.000 claims description 32
- 239000000498 cooling water Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000000110 cooling liquid Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 6
- 238000012512 characterization method Methods 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 description 5
- 238000009529 body temperature measurement Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
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- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
A device and a method for measuring alloy solidification behavior under different cooling speeds. The device for measuring the alloy solidification behavior under different cooling speeds comprises a graphite mold with a mold cavity arranged in, a graphite mold cover for opening and closing the mold cavity, a water-cooling cylinder sleeve sleeved on the outer wall of the graphite mold, an upper asbestos felt, a lower asbestos felt, a plurality of thermocouples and a temperature acquisition system for receiving thermocouple detection signals, wherein the upper asbestos felt and the lower asbestos felt are respectively arranged on the top surface of the graphite mold cover and the bottom surface of the graphite mold, the mold cavity is formed by sequentially and coaxially communicating a plurality of cylindrical detection cavities with different cross sections, each detection cavity is internally provided with a temperature measuring point, the distance between the radial direction of the corresponding detection cavity and the inner wall of the graphite mold is equal to the distance between the corresponding detection cavity and the corresponding detection cavity, and the thermocouples are respectively used for detecting the alloy temperature of each temperature measuring point. The device and the method for measuring the solidification behavior of the alloy under different cooling speeds can detect the solidified alloy under different cooling speeds in the same experimental process.
Description
Technical Field
The application relates to the field of alloy solidification, in particular to a device and a method for measuring alloy solidification behaviors at different cooling speeds.
Background
In the process of manufacturing metallic materials, solidification of metallic materials has been one of the most fundamental and important links. On the premise of determining the alloy components, the performance of the casting or the ingot is mainly determined by the solidification structure of the alloy, and the cooling speed is an important factor influencing nucleation and growth in the solidification process of the alloy. Therefore, in order to obtain an ideal solidification structure, the solidification behavior of the alloy at different cooling rates needs to be studied to establish an internal connection between the cooling rate of the solidification process and the solidification structure of the corresponding alloy, and clear a solidification cooling rate range (window) that should be adopted for the corresponding alloy to obtain a certain solidification structure.
At present, after a target alloy is smelted in a laboratory, the target alloy is solidified at a certain cooling speed by adopting a corresponding process, and the corresponding solidification behavior of the alloy at the cooling speed is analyzed by combining an alloy cooling curve test and a corresponding solidification structure characterization in the solidification process. Undoubtedly, in order to analyze the influence of the cooling rate on the solidification behavior of the alloy, the above experiment needs to be repeated under different cooling rates, and the experiment period is long and the cost is high. In addition, it is difficult to repeat the above experiment at different cooling rates under the condition that other factors are identical, that is, the influence of other factors is unavoidable to remain in the experimental result.
Disclosure of Invention
The application aims to provide a device and a method for measuring the solidification behavior of an alloy at different cooling speeds, which can detect the solidified alloy at different cooling speeds in the same experimental process, are beneficial to shortening the experimental period, saving the experimental cost and improving the accuracy and the credibility of an analysis result.
Embodiments of the present application are implemented as follows:
the embodiment of the application provides a device for measuring alloy solidification behaviors at different cooling speeds, which comprises a graphite mold, a graphite mold cover, a water-cooling cylinder sleeve, an upper asbestos felt, a lower asbestos felt, a plurality of thermocouples and a temperature acquisition system, wherein the graphite mold is internally provided with a mold cavity, the graphite mold cover is used for opening and closing the mold cavity, the water-cooling cylinder sleeve is sleeved on the outer wall of the graphite mold, the upper asbestos felt and the lower asbestos felt are respectively arranged on the top surface of the graphite mold cover and the bottom surface of the graphite mold, the plurality of thermocouples are respectively used for receiving thermocouple detection signals, the mold cavity is formed by sequentially and coaxially communicating a plurality of cylindrical detection cavities, the areas of the cross sections of the detection cavities are different, each detection cavity is internally provided with a temperature measurement point, the distance between each temperature measurement point and the inner wall of the corresponding detection cavity is equal, the distance between each temperature measurement point and the top surface and the bottom surface of the corresponding detection cavity is equal, and the thermocouples are respectively used for detecting the alloy temperatures of the temperature measurement points.
In some alternative embodiments, the mold cavity is formed by sequentially coaxially communicating a plurality of detection cavities with gradually increasing cross-sectional areas from bottom to top.
In some alternative embodiments, a thermocouple is arranged through the graphite mould cover and the upper asbestos felt, the thermocouple is sleeved with a fastening rubber ring, and the bottom of the fastening rubber ring presses against the top of the upper asbestos felt.
In some alternative embodiments, the projection of the mould cavity in the vertical direction is located in the upper and lower asbestos felts.
In some alternative embodiments, a cooling cavity and a spiral cooling water channel are arranged in the cooling cavity, the cooling water channel is communicated with a water inlet, and the cooling cavity is communicated with a water outlet.
In some alternative embodiments, a Ga-In-Sn cooling fluid is arranged between the graphite mould and the water-cooled cylinder sleeve.
In some alternative embodiments, the bottom of the graphite mold expands outwards to form a protruding part, the bottom of the water-cooling cylinder sleeve is recessed inwards to form a recessed part, the protruding part and the recessed part are connected through threads, ga-In-Sn cooling liquid is poured between the outer wall of the top of the graphite mold and the inner wall of the top of the water-cooling cylinder sleeve, and a sealing gasket is arranged on the top surface of the protruding part.
The application also provides a method for measuring the solidification behavior of the alloy at different cooling speeds, which is carried out by using the device for measuring the solidification behavior of the alloy at different cooling speeds, and comprises the following steps:
introducing cooling water into the water-cooling cylinder sleeve, pouring molten alloy melt into the die cavity after the cooling water flows out from the water outlet of the water-cooling cylinder sleeve, and receiving the temperature change in the alloy cooling process detected by each thermocouple through a temperature acquisition system to obtain an alloy solidification cooling curve;
taking out the alloy cast ingot after the alloy is cooled to room temperature, sampling near the temperature measuring points of the thermocouples, and analyzing the solidification structure characteristics of the samples;
and (3) integrating the solidification structure characteristics of each sample and the corresponding alloy solidification cooling curve characterization results, and analyzing the solidification behaviors of the alloy at different cooling speeds.
The beneficial effects of the application are as follows: the device for measuring alloy solidification behavior under different cooling rates provided by the embodiment comprises a graphite mold internally provided with a mold cavity, a graphite mold cover for opening and closing the mold cavity, a water-cooling cylinder sleeve sleeved on the outer wall of the graphite mold, an upper asbestos felt, a lower asbestos felt, a plurality of thermocouples and a temperature acquisition system for receiving thermocouple detection signals, wherein the upper asbestos felt and the lower asbestos felt are respectively arranged on the top surface of the graphite mold cover and the bottom surface of the graphite mold, the mold cavity is formed by sequentially and coaxially communicating a plurality of cylindrical detection cavities, the cross sections of the detection cavities are different in area, temperature measuring points are arranged in each detection cavity, the distance between each temperature measuring point and the inner wall of the graphite mold along the radial direction of the corresponding detection cavity is equal, the distance between each temperature measuring point and the top surface and the bottom surface of the corresponding detection cavity is equal, and the thermocouples are respectively used for detecting the alloy temperatures of the temperature measuring points. The device and the method for measuring the alloy solidification behavior under different cooling speeds can detect the alloy solidified under different cooling speeds in the same experimental process, are beneficial to shortening the experimental period, saving the experimental cost and improving the accuracy and the credibility of the analysis result.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of an apparatus for measuring solidification behavior of an alloy at different cooling rates according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a graphite mold in an apparatus for measuring alloy solidification behavior at different cooling rates according to an embodiment of the present application;
FIG. 3 is a cross-sectional view of a water-cooled cylinder liner in an apparatus for measuring alloy solidification behavior at different cooling rates according to an embodiment of the present application.
In the figure: 100. a graphite mold; 101. a mold cavity; 102. a boss; 110. a graphite mold cover; 120. water-cooling the cylinder sleeve; 121. a cooling chamber; 122. a cooling water channel; 123. a water inlet; 124. a water outlet; 125. a recessed portion; 130. applying asbestos felt; 140. discharging asbestos felt; 150. Ga-In-Sn cooling liquid; 160. a type K thermocouple; 170. a temperature acquisition system; 180. fastening the rubber ring; 190. a sealing gasket; 200. and a temperature measuring point.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use of the product of the application, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The characteristics and properties of the apparatus and method for measuring solidification behavior of an alloy at different cooling rates according to the present application are described in further detail below with reference to examples.
As shown In fig. 1, fig. 2 and fig. 3, the embodiment of the application provides a device for measuring alloy solidification behavior under different cooling rates, which comprises a graphite mold 100 with a mold cavity 101, a graphite mold cover 110 for opening and closing the mold cavity 101, a water-cooling cylinder sleeve 120 sleeved on the outer wall of the graphite mold 100, an upper asbestos felt 130 and a lower asbestos felt 140 respectively arranged on the top surface of the graphite mold cover 110 and the bottom surface of the graphite mold 100, a Ga-In-Sn cooling liquid 150 arranged between the graphite mold 100 and the water-cooling cylinder sleeve 120, five K-type thermocouples 160 and a temperature acquisition system 170 for receiving detection signals of the K-type thermocouples 160, wherein the mold cavity 101 is formed by sequentially and coaxially communicating five cylindrical detection cavities, the diameters of the five detection cavities are gradually increased from bottom to top, each detection cavity is internally provided with one temperature measuring point 200, the five K-type thermocouples 160 are respectively used for detecting alloy temperatures of the five temperature measuring points 200, the distances between the temperature measuring points 200 along the radial direction of the corresponding detection cavities and the nearest inner wall of the graphite mold 100 are equal, and the distances between the temperature measuring points 200 and the top and the bottom of the corresponding detection cavities are equal. Each K-type thermocouple 160 penetrates through the graphite mold cover 110 and the upper asbestos felt 130, a fastening rubber ring 180 is sleeved on the K-type thermocouple 160, the bottom of the fastening rubber ring 180 is propped against the top of the upper asbestos felt 130, projections of the mold cavity 101 in the vertical direction are positioned in the upper asbestos felt 130 and the lower asbestos felt 140, a cooling cavity 121 and a spiral cooling water channel 122 arranged in the cooling cavity 121 are arranged in the water cooling cylinder sleeve 120, the cooling water channel 122 is communicated with a water inlet 123, and the cooling cavity 121 is communicated with a water outlet 124; the bottom of graphite mold 100 outwards expands to form annular bellying 102, and the bottom of water-cooling cylinder liner 120 inwards caves In to form concave part 125, bellying 102 and concave part 125 pass through threaded connection, and the top outer wall of graphite mold 100 and the top inner wall of water-cooling cylinder liner 120 are poured with Ga-In-Sn coolant 150 between, and the top surface of bellying 102 is equipped with sealed pad 190. Wherein, the thickness of the middle part of the bottom wall of the graphite mold 100 is equal to the thickness of the middle part of the top wall of the graphite mold cover 110 and is 5mm, the thickness of the upper asbestos felt 130 and the lower asbestos felt 140 is equal to each other and is 5mm, and the water-cooling cylinder sleeve 120 is formed by welding inner and outer cylindrical surfaces and upper and lower annular surfaces; the Ga-In-Sn cooling liquid 150 and the die cavity 101 are projected on the side wall of the graphite die 100 to be the same In height and coincide, the cooling water channels 122 are arranged at equal intervals In a spiral mode and are fixed between the inner cylindrical surface and the outer cylindrical surface of the water-cooling cylinder sleeve 120 In a spot welding mode, and the water inlet 123 is communicated with the spiral cooling water channels 122 through welding.
The application also provides a method for measuring the solidification behavior of the alloy at different cooling speeds, which is carried out by using the device for measuring the solidification behavior of the alloy at different cooling speeds, and comprises the following steps:
placing an annular sealing gasket 190 on the top surface of the protruding part 102 of the graphite mold 100, sleeving the water-cooling cylinder sleeve 120 outside the graphite mold 100, rotating to enable the protruding part 102 at the bottom of the graphite mold 100 and the recessed part 125 at the bottom of the water-cooling cylinder sleeve 120 to be connected through threads, enabling the graphite mold 100 and the water-cooling cylinder sleeve 120 to clamp the sealing gasket 190, respectively installing an upper asbestos felt 130 and a lower asbestos felt 140 on the top surface of the graphite mold cover 110 and the bottom surface of the graphite mold 100, and pouring Ga-In-Sn cooling liquid 150 between the top outer wall of the graphite mold 100 and the top inner wall of the water-cooling cylinder sleeve 120;
the method comprises the steps that temperature measuring points 200 are respectively arranged in five detection cavities of a die cavity 101 of a graphite die 100, the distance between each temperature measuring point 200 and the nearest side of the inner wall of the graphite die 100 along the radial direction of the corresponding detection cavity is equal to 5mm, meanwhile, each temperature measuring point 200 is positioned in the middle of the corresponding detection cavity along the height of the axis, five K-type thermocouples 160 penetrate through a graphite die cover 110 and an upper asbestos felt 130 respectively, fastening rubber rings 180 are sleeved on the five K-type thermocouples 160 respectively, the bottom of the fastening rubber rings 180 presses against the top of the asbestos felt 130, and when the graphite die cover 110 covers the sealed die cavity 101, the five K-type thermocouples 160 respectively measure the temperature of the five temperature measuring points 200, and the five K-type thermocouples 160 are electrically connected with a temperature acquisition system 170 respectively through wires;
cooling water is introduced into the cooling water channel 122 of the water-cooling cylinder sleeve 120 through the water inlet 123, after the cooling water enters the cooling cavity 121 through the cooling water channel 122 and is discharged through the water outlet 124, the completely melted alloy melt to be detected is poured into the die cavity 101, the graphite die cover 110 is covered to cover the sealing die cavity 101, and the alloy cooling temperature changes detected by each K-type thermocouple 160 are received through the temperature acquisition system 170, so that an alloy solidification cooling curve is obtained;
taking out the alloy ingot after the alloy is cooled to room temperature, cutting the alloy ingot by adopting a wire electric discharge cutting technology, sampling near the temperature measuring points of each K-type thermocouple 160, and analyzing the solidification structure characteristics of each sample;
and (3) integrating the solidification structure characteristics of each sample and the corresponding alloy solidification cooling curve characterization results, and analyzing the solidification behaviors of the alloy at different cooling speeds.
The device and the method for measuring the solidification behavior of the alloy under different cooling speeds provided by the embodiment are provided with the graphite mold 100, the water-cooling cylinder sleeve 120 for conducting heat conduction and cooling on the outer wall of the graphite mold 100 and the five K-type thermocouples 160, wherein the mold cavity 101 is formed by sequentially and coaxially communicating five detection cavities with different cross sections, the five K-type thermocouples 160 are respectively used for detecting the cooling speeds of the alloy in each detection cavity, and the device can be used for analyzing the solidification behavior of the alloy under different cooling speeds in one detection process, so that the experimental period is effectively shortened, the experimental cost is saved, and the accuracy and the reliability of analysis results are improved.
Wherein, the mold cavity 101 in the graphite mold 100 has a plurality of coaxially communicated cylindrical detection cavities with different cross-sectional areas, which can provide an alloy solidification process with different cooling speeds, the principle is as follows:
alloy heat dissipation in a certain tiny time (dt) is as follows:
Q t ＝mc.dT
wherein Q is 1 The heat quantity of the alloy in dT time is m is the mass of the alloy of the investigation unit, c is the specific heat capacity of the alloy, and dT is the temperature change of the alloy in dT time;
heat Q dissipated by the side walls of graphite mold 100 at the same time dt 2 The method comprises the following steps:
wherein A is the heat conduction area, lambda is the heat conduction coefficient of the graphite mold 100, d is the thickness of the corresponding section of the graphite mold 100, T is the temperature of the alloy near the inner wall of the graphite mold 100 at the investigation moment, T 0 Is the outside temperature of the graphite mold 100;
because the upper and lower parts of the graphite mold 100 are respectively provided with the upper asbestos felt 130 and the lower asbestos felt 140 which are insulated, the alloy heat In the solidification process is basically guided out from the side wall of the graphite mold 100, and is taken away by circulating cooling water after passing through the Ga-In-Sn cooling liquid 150 and the inner wall of the water-cooling cylinder sleeve 120. According to conservation of energy (Q 1 ＝Q 2 ) Can be obtained
From the above, it can be seen that the cooling rate and phase of the alloy in the vicinity of the inner wall of the graphite mold 100 during solidification processThe thickness d of the side wall is inversely proportional, and the design of variable cross-section thickness is adopted on the same graphite mold 100, so that different cooling speeds can be obtained at different positions in the same graphite mold 100 in the same experiment. Furthermore, as can be seen from the above formula, the alloy cooling rateAlso subjected to the outside temperature T of the graphite mold 100 0 T 0 The lower the cooling rate, the faster. T (T) 0 Is mainly influenced by the Ga-In-Sn cooling intensity and is finally limited by the water temperature and the flow rate of circulating cooling water. Therefore, in the actual operation process, after the graphite mold with the variable cross-section thickness is designed, the fine adjustment of the actual cooling speed of each temperature measuring point can be realized through the control of circulating cooling water, so that the actual cooling speed approaches to the preset cooling speed.
Wherein, through setting up Ga-In-Sn coolant 150 between graphite mould 100 and water-cooling cylinder liner 120, can strengthen the heat exchange rate between graphite mould 100 and the water-cooling cylinder liner 120, shorten experimental period, practice thrift the experiment cost.
In other alternative embodiments, the thickness of the middle of the bottom wall of the graphite mold 100 and the thickness of the middle of the top wall of the graphite mold cover 110 are equal and may also be 5-7 mm, and the thickness of the upper and lower asbestos felts 130 and 140 are equal and may also be 4-5 mm.
The embodiments described above are some, but not all embodiments of the application. The detailed description of the embodiments of the application is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Claims (8)
1. The device for measuring the alloy solidification behavior under different cooling rates is characterized by comprising a graphite mold, a graphite mold cover, a water-cooling cylinder sleeve, an upper asbestos felt, a lower asbestos felt, a plurality of thermocouples and a temperature acquisition system, wherein the graphite mold is internally provided with a mold cavity, the graphite mold cover is used for opening and closing the mold cavity, the water-cooling cylinder sleeve is sleeved on the outer wall of the graphite mold, the upper asbestos felt and the lower asbestos felt are respectively arranged on the top surface and the bottom surface of the graphite mold cover, the thermocouples are used for receiving thermocouple detection signals, the mold cavity is formed by sequentially and coaxially communicating a plurality of cylindrical detection cavities, the cross sections of the detection cavities are different in area, each detection cavity is internally provided with a temperature measuring point, the distance between the radial direction corresponding detection cavity and the inner wall of the graphite mold is equal to the distance between each temperature measuring point and the top surface and the bottom surface corresponding to the detection cavity, and the thermocouples are respectively used for detecting the alloy temperatures of the temperature measuring points.
2. The apparatus for measuring solidification behavior of an alloy at different cooling rates according to claim 1, wherein said cavity is composed of a plurality of said detection chambers having gradually increasing cross-sectional areas from bottom to top, which are sequentially and coaxially connected.
3. Device for measuring the solidification behaviour of an alloy at different cooling rates according to claim 1, characterized in that the thermocouple is arranged through the graphite mould cover and the upper asbestos felt, the thermocouple being provided with a fastening rubber ring, the bottom of which abuts against the top of the upper asbestos felt.
4. An apparatus for measuring the solidification behaviour of an alloy at different cooling rates according to claim 1, characterized in that the projections of the mould cavity in the vertical direction are located in the upper and lower asbestos felts.
5. The device for measuring the solidification behavior of the alloy at different cooling speeds according to claim 1, wherein a cooling cavity and a spiral cooling water channel arranged in the cooling cavity are arranged in the water-cooling cylinder sleeve, the cooling water channel is communicated with a water inlet, and the cooling cavity is communicated with a water outlet.
6. The apparatus for measuring solidification behavior of an alloy at different cooling rates according to claim 5, wherein a Ga-In-Sn cooling liquid is provided between the graphite mold and the water-cooled cylinder liner.
7. The device for measuring the solidification behavior of an alloy at different cooling rates according to claim 6, wherein the bottom of the graphite mold is expanded outwards to form a convex part, the bottom of the water-cooling cylinder sleeve is recessed inwards to form a concave part, the convex part and the concave part are connected through threads, the Ga-In-Sn cooling liquid is poured between the top outer wall of the graphite mold and the top inner wall of the water-cooling cylinder sleeve, and a sealing gasket is arranged on the top surface of the convex part.
8. A method of measuring the solidification behavior of an alloy at different cooling rates using the apparatus for measuring solidification behavior of an alloy at different cooling rates as set forth in claim 1, comprising the steps of:
cooling water is introduced into the water-cooling cylinder sleeve, molten alloy melt is poured into the die cavity after the cooling water flows out from the water outlet of the water-cooling cylinder sleeve, and the temperature acquisition system receives the temperature change in the alloy cooling process detected by each thermocouple, so that an alloy solidification cooling curve is obtained;
taking out the alloy cast ingot after the alloy is cooled to room temperature, sampling near the temperature measuring points of the thermocouples, and analyzing the solidification structure characteristics of the samples;
and (3) integrating the solidification structure characteristics of each sample and the corresponding alloy solidification cooling curve characterization results, and analyzing the solidification behaviors of the alloy at different cooling speeds.
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| CN204405574U (en) * | 2015-02-12 | 2015-06-17 | 哈尔滨理工大学 | Rotary thermal shock sample chamber and the chamber based on this sample chamber |
| CN214749900U (en) * | 2020-12-31 | 2021-11-16 | 辽宁科技学院 | Detection tube for determining molar mass of substance by freezing point depression method |
| CN114324449A (en) * | 2021-12-29 | 2022-04-12 | 重庆大学 | Novel casting mold testing device and shrinkage porosity control method thereof |
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