CN111578711A - High-temperature creep furnace for metal creep test - Google Patents
High-temperature creep furnace for metal creep test Download PDFInfo
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- CN111578711A CN111578711A CN202010403009.2A CN202010403009A CN111578711A CN 111578711 A CN111578711 A CN 111578711A CN 202010403009 A CN202010403009 A CN 202010403009A CN 111578711 A CN111578711 A CN 111578711A
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- furnace
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- high temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any preceding group
- F27B17/02—Furnaces of a kind not covered by any preceding group specially designed for laboratory use
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
- F27D21/0014—Devices for monitoring temperature
Abstract
The invention relates to a high-temperature creep furnace for a metal creep test, which comprises a furnace body stainless steel-cold rolled sheet double-layer type shell, a hearth ceramic fiber heat preservation and insulation layer, a molybdenum disilicide alloy heating element, a thermocouple type temperature control meter, a wiring aluminum bar and a wiring protective cover; the test temperature range provided by the high-temperature creep furnace is 800-1600 ℃; the main body of the high-temperature creep furnace is arranged on a main frame rail of the testing machine and can slide up and down along the rail, and a clamp for clamping a sample enters the furnace body through openings reserved at the upper end and the lower end of the furnace body; when the high-temperature creep furnace is used, the furnace body is moved upwards firstly to enable the upper clamp and the lower clamp to be arranged outside the furnace body, then a sample is clamped, a corresponding number of thermocouples are selected to be bound in a sample gauge length range, finally the furnace body is moved downwards to place the sample in the center of a hearth, a lead is connected through a wiring aluminum bar and is electrified for heating, and the temperature in the furnace can be monitored and adjusted in real time through a temperature control meter in a test.
Description
Technical Field
The invention discloses a high-temperature creep furnace for a metal creep test, belongs to the technical field of material mechanical property testing, can be applied to the new process field of new materials such as semiconductors, aerospace, microelectronics, nanotechnology, carbon fibers and the like, and mainly provides a high-temperature test environment for the metal creep test for laboratories of units such as colleges and universities and scientific research institutions.
Background
The metal material can generate a creep phenomenon under the action of certain temperature and stress, the creep phenomenon of the material is more and more non-negligible along with the higher and more high requirement of a novel engine on the working temperature of the high-temperature metal material, and the research on the creep phenomenon of the material has important significance for the development of the design work of devices such as boilers, internal combustion engines, gas turbines, nuclear reactors and the like which need to work at high temperature for a long time. The development of a creep test of a metal material requires a heating device to provide a stable high-temperature environment for a sample for a long time. The development of a new generation of high-temperature creep furnace with high reliability and high heating performance can provide help for the deep exploration of the work of the creep endurance test.
Disclosure of Invention
The invention provides a high-temperature creep furnace for a metal creep rupture test, which is designed and provided aiming at the prior art, and aims to provide a heating capacity of 800-1600 ℃ for a sample.
In order to solve the technical problem, the technical scheme of the invention is as follows:
this kind of a high temperature creep furnace for lasting creep test of metal includes furnace body stainless steel-cold-rolled sheet double-layer equation shell 1, furnace ceramic fibre heat preservation insulating layer 2, molybdenum disilicide alloy heating element 3, thermocouple formula temperature control table 4, wiring aluminium bar 5 and wiring protection casing 6, wherein:
the hearth ceramic fiber heat-insulation layer 2 is fixedly lined on the inner side of a furnace body stainless steel-cold-rolled sheet double-layer type shell 1, the molybdenum disilicide alloy heating elements 3 are in a strip shape and are uniformly distributed along the circumference of the inner side of the hearth ceramic fiber heat-insulation layer 2, gaps are kept between the heating elements and the surface of the inner side of the hearth ceramic fiber heat-insulation layer 2, and a heating interval is formed towards the center of the hearth.
In one implementation, the molybdenum disilicide alloy heating elements 3 are U-shaped, four heating elements are uniformly distributed along the inner circumference of the hearth ceramic fiber heat-insulation layer 2, and the end parts of the heating elements upwards penetrate through the hearth ceramic fiber heat-insulation layer 2 to be connected with the wiring aluminum bar 5 of the external lead wire, so that a power supply is provided for the molybdenum disilicide alloy heating elements 3.
The power of a single group of heating elements of the four groups of molybdenum disilicide alloy heating elements 3 is 1.8 kilowatts, the total heating power is 7.2 kilowatts, the molybdenum disilicide alloy heating elements 3 have the dual characteristics of metal and ceramic, can resist 2030 ℃ high temperature and have oxidation resistance at 1800 ℃, and are made by sintering uniform molybdenum disilicide alloy particles without impurities, and a silicon dioxide passivation layer formed on the surface of the molybdenum disilicide alloy heating elements 3 at high temperature has the function of preventing further oxidation; the heating elements adopt a two-in-one connection mode, and the temperature rise process is smooth and rapid;
further, the distance between the heating rods of the U-shaped molybdenum disilicide alloy heating element 3 is 50mm, and the length of the heating section part of the heating rod of the U-shaped molybdenum disilicide alloy heating element 3 is 400 mm.
In one implementation, the thermocouple type temperature control meter 4 is installed on the side surface of the middle part of the double-layer shell 1 made of stainless steel and cold-rolled sheet of the furnace body, and the main body part of the thermocouple type temperature control meter penetrates through the double-layer shell 1 made of stainless steel and cold-rolled sheet of the furnace body and the ceramic fiber heat-insulating layer 2 of the furnace hearth to reach the inside of the furnace hearth and is connected with a thermocouple bound on a sample for measuring the temperature of the sample at the center of the furnace hearth.
In one implementation, the double-layer outer shell 1 of the stainless steel-cold rolled sheet of the furnace body is a cylinder, and is provided with a fixing part which can be connected with a track of a main frame of the testing machine, the outer shell is made of 304 stainless steel and adopts a mesh structure to prevent the surface temperature of the furnace body from being overhigh, and the inner shell is made of cold rolled sheet to prevent the temperature loss in the furnace and control the uniformity of the furnace temperature.
In one implementation, round openings for allowing a sample and a clamp to pass through are reserved at the upper end and the lower end of the hearth ceramic fiber heat-insulation layer 2, and the hearth ceramic fiber heat-insulation layer 2 is made of vacuum alumina ceramic fibers with compact tissue structures through one-step hot-press molding.
In one implementation, the diameter of the hearth cavity surrounded by the hearth ceramic fiber heat-insulating layer 2 is 170mm, the height is 400mm, the outer diameter of a 200 mm-long temperature-equalizing zone of the strip-shaped molybdenum disilicide alloy heating element 3 in the center of the hearth is 9 +/-0.1 mm, the outer diameter of the strip-shaped molybdenum disilicide alloy heating element 3 above the temperature-equalizing zone is 9.5mm, and the outer diameter of the strip-shaped molybdenum disilicide alloy heating element 3 below the temperature-equalizing zone is 8.5 mm. The hearth structure adopts a stepped design and is divided into three areas, the temperature of the lower high-temperature area is slightly higher than that of the working area, the middle heating area is a furnace chamber working temperature area, the temperature of the upper low-temperature area is slightly lower than that of the working area, and the three areas form temperature complementation to ensure the temperature gradient of the 200 mm uniform temperature area;
in one embodiment, the side of the wire protective cover 6 is provided with a square opening for passing an external wire.
In one implementation, the thermocouple-type temperature control gauge 4 employs a type B double platinum rhodium metal plate as the temperature measuring element.
In practice, the high temperature creep furnace may provide a test temperature range of 800 to 1600 degrees celsius, a temperature gradient of 4 degrees from 300 to 1200 degrees, a temperature gradient of 1% above 1200 degrees, and a ramp rate of 5 to 20 degrees per minute.
The technical scheme of the invention has the beneficial effects that:
the high-temperature creep furnace can be properly matched with the existing endurance testing machine in the aspects of external size and structural form, and can provide the highest heating capacity of 1600 ℃ for a sample, so that the endurance creep test work of a metal material under the condition of 800-1600 ℃ can be carried out, and the high-temperature creep furnace has wide application prospect in the technical field of material mechanical property testing.
Drawings
FIG. 1 is a schematic view of the general structure of a high temperature creep furnace according to the present invention;
FIG. 2 is a schematic view of a control panel of the thermocouple-type temperature control gauge 4 according to the present invention;
FIG. 3 is a schematic view of a U-shaped molybdenum disilicide alloy heating element according to the present invention;
Detailed Description
The technical scheme of the invention is further detailed in the following by combining the drawings and the embodiment:
as shown in figure 1, the high-temperature creep furnace of the embodiment comprises a furnace body stainless steel-cold-rolled sheet double-layer type shell 1, a hearth ceramic fiber heat preservation and insulation layer 2, a molybdenum disilicide alloy heating element 3, a thermocouple type temperature control table 4, wiring aluminum rows 5 and 6, and a wiring protective cover. The furnace body heat-insulating layer 2 is fixedly lined inside a furnace body stainless steel-cold-rolled sheet double-layer type shell 1, the end part of a molybdenum disilicide alloy heating element 3 is arranged at the top of the furnace body, an external lead can be connected to a wiring aluminum bar 5 through an opening on a wiring protective cover 6 to provide a power supply for the molybdenum disilicide alloy heating element 3, and the main body part of the molybdenum disilicide alloy heating element 3 penetrates through the furnace body ceramic fiber heat-insulating layer 2 to be arranged inside the furnace body; the thermocouple type temperature control meter 4 is arranged on the side surface of the middle part of the high-temperature creep furnace, the main part of the thermocouple type temperature control meter passes through the furnace body stainless steel-cold-rolled sheet double-layer type shell 1 and the hearth ceramic fiber heat-preservation and heat-insulation layer 2 to reach the inside of the hearth, and is connected with a thermocouple bound on a sample; the double-layer outer shell 1 of the stainless steel-cold rolled sheet of the furnace body is a cylinder, and is provided with a fixing part which can be connected with a main frame rail of the testing machine, the shell is designed into a double-layer structure of the stainless steel-cold rolled sheet, the outer shell is made of 304 stainless steel, a mesh structure is adopted to prevent the surface temperature of the furnace body from being overhigh, and the inner shell is made of the cold rolled sheet to prevent the temperature loss in the furnace and control the uniformity of the furnace temperature; the molybdenum disilicide alloy heating element 3 adopts a U-shaped structure, the span distance of two sides is 50mm, the total length of the heating section parts of two sides of each group of heating element is 400mm, the heating section adopts a stepped structure, the outer diameter of the middle 200 mm uniform temperature zone part is 9 +/-0.1 mm, the outer diameter of the upper 100 mm part is 9.5mm, the outer diameter of the bottom 100 mm part is 8.5mm, the total length of the cold end part at the bottom of the heating element is 225 mm, and four groups of heating elements are uniformly distributed on the inner side of the hearth along a circumferential distribution mode; circular openings for allowing a sample and a clamp to pass through are reserved at the upper end and the lower end of the hearth ceramic fiber heat-insulating layer 2, the material is made of vacuum alumina ceramic fibers with compact tissue structures through one-step hot press molding, the diameter of a hearth cavity surrounded by the heat-insulating layer is 170mm, the height of the hearth cavity is 400mm, the hearth structure is designed in a ladder mode and is divided into three areas which can form temperature complementation and are a lower high-temperature area, a middle heating area and an upper low-temperature area, and the temperature gradient of a 200 mm uniform-temperature area is guaranteed; a square opening through which an external lead passes is reserved on the side surface of the wiring protective cover 6; the thermocouple type temperature control meter 4 adopts a B-type double platinum rhodium metal sheet as a temperature measuring element.
The high-temperature creep furnace of the embodiment can be properly matched with the existing endurance testing machine in the aspects of external dimension and structural form, the main body of the high-temperature creep furnace is arranged on a main frame rail of the testing machine and can slide up and down along the rail, and a clamp for clamping a sample enters the furnace body through openings reserved at the upper end and the lower end of the furnace body; when the high-temperature creep furnace is used, the furnace body is moved upwards firstly to enable the upper clamp and the lower clamp to be arranged outside the furnace body, then the sample is clamped, a corresponding number of thermocouples are selected to be bound in a sample gauge length range, finally the furnace body is moved downwards to place the sample in the center of the hearth and is electrified for heating, and the temperature in the furnace can be monitored and adjusted in real time through the temperature control meter in the test. The high-temperature creep furnace of the embodiment can provide the maximum heating capacity of 1600 ℃ for the sample, so that the lasting creep test work of the metal material under the condition of 800-1600 ℃ can be carried out.
Claims (10)
1. A high temperature creep furnace for a metal creep rupture test is characterized in that: this high temperature creep furnace includes furnace body stainless steel-cold-rolled sheet double-layer equation shell (1), furnace ceramic fibre heat preservation insulating layer (2), molybdenum disilicide alloy heating element (3), thermocouple formula control by temperature change table (4), wiring aluminium bar (5) and wiring protection casing (6), wherein:
the hearth ceramic fiber heat-insulation layer (2) is fixedly lined on the inner side of a furnace body stainless steel-cold-rolled plate double-layer shell (1), the molybdenum disilicide alloy heating elements (3) are in a strip shape and are uniformly distributed along the inner side circumference of the hearth ceramic fiber heat-insulation layer (2), gaps are kept between the heating elements and the inner side surface of the hearth ceramic fiber heat-insulation layer (2), and a heating interval is formed towards the central part of the hearth.
2. The high temperature creep furnace for metal creep rupture tests according to claim 1, characterized in that: the molybdenum disilicide alloy heating elements (3) are U-shaped, four heating elements are uniformly distributed along the circumference of the inner side of the hearth ceramic fiber heat-insulation layer (2), and the end parts of the heating elements upwards penetrate through the hearth ceramic fiber heat-insulation layer (2) to be connected with the wiring aluminum bar (5) of the external lead, so that a power supply is provided for the molybdenum disilicide alloy heating elements (3).
3. A high temperature creep furnace for metal creep rupture tests according to claim 2, characterized in that: the distance between the heating rods of the U-shaped molybdenum disilicide alloy heating element (3) is 50mm, and the length of the heating section part of the heating rod of the U-shaped molybdenum disilicide alloy heating element (3) is 400 mm.
4. The high temperature creep furnace for metal creep rupture tests according to claim 1, characterized in that: the thermocouple type temperature control meter (4) is arranged on the side surface of the middle part of the double-layer shell (1) of the stainless steel-cold rolled sheet of the furnace body and is used for measuring the temperature of a sample at the center of the hearth.
5. The high temperature creep furnace for metal creep rupture tests according to claim 1, characterized in that: the double-layer outer shell (1) of the stainless steel-cold rolled sheet of the furnace body is a cylinder, a fixing component which can be connected with a track of a main frame of the testing machine is arranged on the double-layer outer shell (1), the outer shell is made of 304 stainless steel, a mesh structure is adopted to prevent the surface temperature of the furnace body from being overhigh, and the inner shell is made of the cold rolled sheet to prevent the temperature loss in the furnace and control the uniformity of the furnace temperature.
6. The high temperature creep furnace for metal creep rupture tests according to claim 1, characterized in that: round openings for the sample and the clamp to pass through are reserved at the upper end and the lower end of the hearth ceramic fiber heat-insulation layer (2), and the hearth ceramic fiber heat-insulation layer (2) is made of vacuum alumina ceramic fibers with compact tissue structures through one-step hot-press molding.
7. A high temperature creep furnace for metal creep rupture tests according to claim 1 or 2, characterized in that: the diameter of a hearth inner cavity surrounded by the hearth ceramic fiber heat-insulating layer (2) is 170mm, the height of the hearth inner cavity is 400mm, the outer diameter of a 200 mm-length temperature-equalizing zone of the strip-shaped molybdenum disilicide alloy heating element (3) positioned at the center of the hearth is 9 +/-0.1 mm, the outer diameter of the strip-shaped molybdenum disilicide alloy heating element (3) above the temperature-equalizing zone part is 9.5mm, and the outer diameter of the strip-shaped molybdenum disilicide alloy heating element (3) below the temperature-equalizing zone part is 8.5 mm.
8. The high temperature creep furnace for metal creep rupture tests according to claim 1, characterized in that: and a square opening through which an external lead passes is reserved on the side surface of the wiring protective cover (6).
9. A high temperature creep furnace for metal creep rupture tests according to claim 1 or 4, characterized in that: the thermocouple type temperature control meter (4) adopts a B-type double platinum rhodium metal sheet as a temperature measuring element.
10. The high temperature creep furnace for metal creep rupture tests according to claim 7, characterized in that: the high temperature creep furnace can provide a test temperature range of 800-1600 ℃, a temperature gradient of 4 ℃ at 300-1200 ℃, a temperature gradient of 1% above 1200 ℃, and a raising rate of 5-20 ℃ per minute.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010403009.2A CN111578711A (en) | 2020-05-13 | 2020-05-13 | High-temperature creep furnace for metal creep test |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010403009.2A CN111578711A (en) | 2020-05-13 | 2020-05-13 | High-temperature creep furnace for metal creep test |
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| CN111578711A true CN111578711A (en) | 2020-08-25 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101639325A (en) * | 2009-08-28 | 2010-02-03 | 华南理工大学 | Combined multifunctional resistance furnace |
| CN101706213A (en) * | 2009-12-11 | 2010-05-12 | 中国航空工业集团公司北京航空材料研究院 | Heating furnace for creep and rupture life tester |
| US20120223066A1 (en) * | 2011-03-01 | 2012-09-06 | Tokyo Electron Limited | Thermal processing apparatus and method of controlling the same |
| CN103869848A (en) * | 2014-03-12 | 2014-06-18 | 中国航空工业集团公司北京航空材料研究院 | Heating furnace for plate sample fatigue test |
| CN205119780U (en) * | 2015-10-13 | 2016-03-30 | 天津市盛通达实验设备有限公司 | Full fibre box furnace of rapid heating up |
| CN210070582U (en) * | 2019-11-26 | 2020-02-14 | 北京北方华创微电子装备有限公司 | Heating furnace body and semiconductor device |
-
2020
- 2020-05-13 CN CN202010403009.2A patent/CN111578711A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101639325A (en) * | 2009-08-28 | 2010-02-03 | 华南理工大学 | Combined multifunctional resistance furnace |
| CN101706213A (en) * | 2009-12-11 | 2010-05-12 | 中国航空工业集团公司北京航空材料研究院 | Heating furnace for creep and rupture life tester |
| US20120223066A1 (en) * | 2011-03-01 | 2012-09-06 | Tokyo Electron Limited | Thermal processing apparatus and method of controlling the same |
| CN103869848A (en) * | 2014-03-12 | 2014-06-18 | 中国航空工业集团公司北京航空材料研究院 | Heating furnace for plate sample fatigue test |
| CN205119780U (en) * | 2015-10-13 | 2016-03-30 | 天津市盛通达实验设备有限公司 | Full fibre box furnace of rapid heating up |
| CN210070582U (en) * | 2019-11-26 | 2020-02-14 | 北京北方华创微电子装备有限公司 | Heating furnace body and semiconductor device |
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Application publication date: 20200825 |
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