CN103105336A - Micro sample creep and creep fatigue test system and test method - Google Patents
Micro sample creep and creep fatigue test system and test method Download PDFInfo
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- CN103105336A CN103105336A CN2013100117595A CN201310011759A CN103105336A CN 103105336 A CN103105336 A CN 103105336A CN 2013100117595 A CN2013100117595 A CN 2013100117595A CN 201310011759 A CN201310011759 A CN 201310011759A CN 103105336 A CN103105336 A CN 103105336A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/54—Performing tests at high or low temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0071—Creep
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
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- G01N2203/0226—High temperature; Heating means
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Abstract
The invention discloses a micro sample creep and creep fatigue test system and a test method. The micro sample creep and creep fatigue test system comprises a host frame, a high-temperature furnace, a servo motor loading system, a distance measuring device, a force measuring device, a cooling system, a clamping mechanism, a quartz tube, an air supply device, a computer control system and a data collection system. The micro sample creep and creep fatigue test system provided by the invention can perform a micro-tensile sample creep test and a micro-bending sample creep test, thereby facilitating test operation by researchers and test popularization.
Description
Technical field
The present invention relates to a kind of micro-test sample creep, creep fatigue pilot system and test method.
Background technology
In the high energy consumption industries such as thermoelectricity, nuclear power, petrochemical industry and oil refining, in order to realize the target of energy-saving and emission-reduction, need to improve the utilization factor that the technical parameters such as temperature, pressure improve resource, thereby relevant high-temperature component is had higher requirement.How to guarantee that the safety and stability of relevant device in high temperature and rugged surroundings becomes great research topic.Under hot environment, the main failure mode of in-service equipment is creep and fatigue, but under some specific operating modes, as steam, contain in the higher gaseous environment of oxygen, load and oxidation exist certain reciprocal effect, thereby affect serviceable life and the safe operation of in-service equipment.Therefore, need fully to understand the creep oxidation of in-service equipment, the reciprocation between fatigue-creep oxidation, thereby carry out accurately and effectively life appraisal.
At present, the assessment of the material property of in-service equipment is mainly Non-Destructive Testing and micro-test sample test.But the defective of present Dynamic Non-Destruction Measurement main test material mainly adopts the micro-test sample test for the mechanical property of material.GB/T2039-1997 " metal stretching creep and duration running method " has unified standard to simple tension creep test, but specimen size is larger, can't satisfy the requirement that in-service equipment sampling is tested.The people's such as Tu Shandong and Ling Xiang invention has realized 3 curved, 4 dissimilar microbend sample creep tests such as curved, but carrying out little tensile sample creep test and microbend sample creep test needs two different pilot systems to realize, with high costs, not general, be unfavorable for the popularization that the researchist tests and tests.
Summary of the invention
The technical problem to be solved in the present invention is can't take into account the defective of little tensile sample creep test and microbend sample creep test in order to overcome prior art equipment, and a kind of micro-test sample creep, creep fatigue pilot system, a kind of little tensile sample creep test method and a kind of microbend sample creep test method are provided.
The present invention solves above-mentioned technical matters by following technical proposals:
A kind of micro-test sample creep, creep fatigue pilot system, its characteristics are, described micro-test sample creep, creep fatigue pilot system comprise main machine frame, high temperature furnace, servomotor charger, distance measuring equipment, device for measuring force, cooling system, clamping mechanism, quartz ampoule, feeder, computer control system and data acquisition system (DAS), wherein
Described main machine frame comprises base, an entablature, a middle cross beam and two root posts;
Described servomotor charger is arranged on described main machine frame base, and described middle cross beam is passed in its upper end, and coordinates with an orienting sleeve that is nested on described middle cross beam;
Described device for measuring force is connected with described servomotor charger, and is arranged at the top of described servomotor charger;
Described distance measuring equipment is fixed on the middle cross beam of described main machine frame, and its sensing head is placed between described device for measuring force and cooling system;
Described cooling system is arranged at above device for measuring force, and it is cooling that described cooling system provides recirculated water to carry out by water tank;
Described clamping mechanism is arranged at above described cooling system, comprise lower support bar, fixture external member and upper support bar, described fixture external member is placed in described quartz ampoule, the lower end of described upper support bar is threaded with described fixture external member and is embedded in described quartz ampoule upper end, the detent mechanism that the upper end of described upper support bar and is arranged on described entablature is connected, and the upper end of described lower support bar is threaded with described fixture external member and is embedded in described quartz ampoule lower end;
Described fixture external member is stretching clamp external member, three-point bending fixture external member, four-point bending fixture external member or little punching fixture external member;
Be provided with some thermopairs that are connected with temperature controller on described fixture external member, described temperature controller is for the temperature of regulating described high temperature furnace;
Described quartz ampoule is connected with described high temperature furnace is nested, and its two ends penetrate in described high temperature furnace;
Described feeder delivers gas in the space that is made of described clamping mechanism and described quartz ampoule by draft tube.
Preferably, micro-test sample comprises little tensile sample and microbend sample, and described microbend sample comprises little 3 curved samples, little 4 curved samples and small punching sample, and wherein, the two ends of described little tensile sample respectively are provided with a convex shoulder.
Preferably, be provided with at least one pore on described three-point bending fixture external member, four-point bending fixture external member and little punching fixture external member, wherein,
Described stretching clamp external member comprises two chucks, each described chuck respectively comprises a front mould and a rear mold that is detachably connected, described front mould and rear mold are provided with one for the groove that holds the micro-test sample convex shoulder, described two chucks are threaded with described upper support bar and described lower support bar respectively, the stress that produces in the time of can avoiding adopting the fixture clamping by the design of convex shoulder and groove collocation, and convex shoulder is also spacing in groove, thereby the impact that is difficult for sliding is measured;
Described three-point bending fixture external member comprises that a top is provided with the single head depression bar that pedestal and that the locating sleeve of a pilot hole, is arranged at described locating sleeve below has a pressure head, the size shape of the xsect of described pressure head is identical with the size shape of described pilot hole, described pressure head passes described pilot hole, and contact with micro-test sample on being placed in described pedestal, described pedestal and described lower support bar are threaded, and described single head depression bar and described upper support bar are threaded;
Described four-point bending fixture external member comprises that a top is provided with the double end depression bar that pedestal and that the locating sleeve of two pilot holes, is arranged at described locating sleeve below has two pressure heads, the size shape of the xsect of described pressure head is identical with the size shape of described pilot hole, described pressure head passes described pilot hole, and contact with micro-test sample on being placed in described pedestal, described pedestal and described lower support bar are threaded, and described double end depression bar and described upper support bar are threaded;
Described little punching fixture external member comprises a top be provided with the locating sleeve of a pilot hole, a pedestal that is arranged at described locating sleeve below, the single head depression bar that a pressure ball and has a pressure head, the size shape of the xsect of described pressure head is identical with the size shape of described pilot hole, described pressure head passes described pilot hole, and contact with described pressure ball on being placed in micro-test sample, described pedestal and described lower support bar are threaded, and described single head depression bar and described upper support bar are threaded.
Preferably, described feeder comprises gas cylinder or a steam generating system that is connected with described draft tube, institute's draft tube is provided with flowmeter and is used for controlling the flow valve of gas flow, described steam generating system comprises a nitrogen gas cylinder, a water tank that is connected with described nitrogen gas cylinder and is connected the steam raising plant that is connected with described water tank, and described steam raising plant also is connected with described draft tube.Contain aerobic in general water, the water vapour of generation is unsaturated, is difficult to the Pass Test condition during test, and the described steam generating system oxygen in water of can draining produces saturated vapor, and is simultaneously simple in structure, successful.
Preferably, the described quartz ampoule partial coverage that is exposed to described high temperature furnace has insulation material.Because having part, described quartz ampoule is exposed to outside described high temperature furnace, and have part to be in described high temperature furnace, easily make the different temperature difference of γ-ray emission in described quartz ampoule, make like this test not meet test condition, wrong data have been measured in test, the accuracy of testing had a huge impact, and by described insulation material (being generally asbestos), can keep the gas temperature in described quartz ampoule constant, guarantee the accuracy of test.
Preferably, described distance measuring equipment is distance measuring sensor, and described device for measuring force is force cell, all is connected with computer control system, and described data acquisition system (DAS) is used for recording the data of described distance measuring sensor, the measurement of described force cell.
Preferably, described servomotor charger comprises servomotor, Timing Belt, reductor and pull bar, described servomotor drives reductor by Timing Belt, and reductor drives pull bar and carries out axially-movable, and described computer control system is used for arranging the creep loading condition.
A kind of little tensile sample creep test method, its characteristics are, comprising:
Step 1, the two ends of micro-test sample are embedded respectively in the groove of rear mold of chuck, the front mould that closes is connected bolt to connect with rear mold front mould, and thermopair is attached on fixture, and chuck is threaded with upper support bar and lower support bar respectively;
Step 4, with device for measuring force zeroing, fine setting servomotor charger is laid down the prestress that produces in installation process, with the distance measuring equipment zeroing, sets spacing distance and spacing power value;
Step 7, computer control system is set, determines load mode and the loading force value of servomotor charger;
Step 8, device for measuring force and distance measuring equipment obtain test figure, and by the data acquisition system (DAS) record.
Preferably, step 3 is: upper support bar is connected with support bar pin on entablature, is exposed to the high temperature furnace place at quartz ampoule and coats insulation material.Because having part, described quartz ampoule is exposed to outside described high temperature furnace, and have part to be in described high temperature furnace, easily make the different temperature difference of γ-ray emission in described quartz ampoule, make like this test not meet test condition, wrong data have been measured in test, the accuracy of testing had a huge impact, and by described insulation material (being generally asbestos), can keep the gas temperature in described quartz ampoule constant, guarantee the accuracy of test.
Preferably, step 7 is: allow the servomotor charger load permanent load, perhaps load triangular waveform, sinusoidal waveform or square waveform alternate load.What general test applied is all permanent load power, and in reality, most cases is alternate load power, and by applying the multiple alternate load power such as triangular wave, sine wave, square wave, the simulating reality situation is tested effectively.
A kind of microbend sample creep test method, its characteristics are, comprising:
Step 1, micro-test sample is embedded in the fixture of clamping mechanism, locating sleeve is enclosed within on fixture, thermopair is attached on fixture;
Step 4, with device for measuring force zeroing, fine setting servomotor charger is moved upward to when sample contact with depression bar lower support bar and stops, and distance measuring equipment is returned to zero, set spacing distance and with spacing power value;
Step 7, computer control system is set, determines load mode and the loading force value of servomotor charger;
Step 8, device for measuring force and distance measuring equipment obtain test figure, and by the data acquisition system (DAS) record.
Preferably, step 3 is: the rotation upper support bar, upper support bar is fixed on entablature after making depression bar embed locating sleeve, and be exposed to the high temperature furnace place at quartz ampoule and coat insulation material.Because having part, described quartz ampoule is exposed to outside described high temperature furnace, and have part to be in described high temperature furnace, easily make the different temperature difference of γ-ray emission in described quartz ampoule, make like this test not meet test condition, wrong data have been measured in test, the accuracy of testing had a huge impact, and by described insulation material (being generally asbestos), can keep the gas temperature in described quartz ampoule constant, guarantee the accuracy of test.
Preferably, step 7 is: allow the servomotor charger load permanent load, perhaps load triangular waveform, sinusoidal waveform or square waveform alternate load.What general test applied is all permanent load power, and in reality, most cases is alternate load power, and by applying the multiple alternate load power such as triangular wave, sine wave, square wave, the simulating reality situation is tested effectively.
In the present invention, but above-mentioned optimum condition combination in any on the basis that meets this area general knowledge namely gets each preferred embodiment of the present invention.
Positive progressive effect of the present invention is: by application of the present invention, can carry out micro-test sample tensile test and two kinds of tests of micro-test sample bending creep test in a cover system, be beneficial to the popularization that the researchist tests and tests.
Description of drawings
Fig. 1 is micro-test sample creep, the creep fatigue test system architecture schematic diagram of the embodiment of the present invention 1.
Fig. 2 is quartz ampoule and the high temperature furnace connection diagram of the embodiment of the present invention 1.
Fig. 3 is the stretching clamp external member structure schematic diagram of the embodiment of the present invention 2.
Fig. 4 is the three-point bending fixture external member structure schematic diagram of the embodiment of the present invention 3.
Fig. 5 is the four-point bending fixture external member structure schematic diagram of the embodiment of the present invention 4.
Embodiment
The below enumerates preferred embodiment, and comes by reference to the accompanying drawings the clearer the present invention that intactly illustrates.
Embodiment 1
as shown in Figure 1, micro-test sample creep of the present invention, the creep fatigue pilot system, comprise gas cylinder 1, nitrogen cylinder 2, valve 3, water tank 4, tensimeter 5, flowmeter 6, safety valve 7, switch 8, steam generator 9, water pump 10, base 11, AC servo motor 12, column 13, distance measuring sensor 14, force cell 15, main machine frame 16, cooling system 17, quartz ampoule 18, high temperature furnace 19, entablature 20, locking device 21, pin 22, upper support bar 23, clamping mechanism 24, fixture external member 25, lower support bar 26, air intake opening 27, middle cross beam 28, chilled water 29, temperature controller 30, device controller 31, emergency stop switch 32, computing machine 33.
As shown in Figure 2, high temperature furnace 19 is for splitting the vertical high-temperature stove, during test, rotatable and be enclosed within outside quartz ampoule 18, its temperature is regulated by temperature controller after being placed in the thermocouple measuring temperature that is attached in quartz ampoule 18 on fixture external member 25, high temperature furnace 19 is connected with temperature controller 30 use wires, and thermopair is connected with temperature controller 30, and high temperature furnace 19 is fixed on the column 13 of main machine frame 16.
When other gases of use are used in test, open gas cylinder 1, gas is filled with in quartz ampoule 18.When using water vapour, nitrogen in nitrogen cylinder 2 is passed into the oxygen that drains in water tank 4 in deionized water, pass into steam generator 9, the steam that produces is controlled flow by flow valve, pass into by draft tube the relatively airtight space that is consisted of by quartz ampoule at last, passed into by quartz ampoule 18 bottoms, discharge from the top, consist of a metastable steam ambient, be used for the mechanical behavior under high temperature of research under steam ambient.
As shown in Figure 3, the present embodiment fixture external member 25 comprises front mould 37 and rear mold 35, and the front and back mould is connected by hexagon socket head cap screw 36, and rear mold 35 is connected with lower support bar 26 or upper support bar 23 by screw thread, little tensile sample 34 is placed in the groove of rear mold 35, relies on the convex shoulder of little tensile sample 34 to fix; High temperature furnace 19 is for splitting the vertical high-temperature stove, during test, rotatable and be enclosed within outside quartz ampoule 18, its temperature is regulated by temperature controller after being placed in the thermocouple measuring temperature that is attached in quartz ampoule 18 on fixture external member 25, high temperature furnace 19 is connected with temperature controller 30 use wires, thermopair is connected with temperature controller 30, and high temperature furnace 19 is fixed on the column 13 of main machine frame 16.
The step that the present embodiment carries out little tensile sample test is as follows:
Step 1, the two ends of little tensile sample 34 are embedded respectively in the groove of rear mold 35 of chuck, front mould 37 closes, front mould 37 is connected with rear mold with hexagon socket head cap screw 36 connections, thermopair is attached on fixture, chuck is threaded with upper support bar and lower support bar respectively;
Step 4, with device for measuring force zeroing, fine setting servomotor charger is laid down the prestress that produces in installation process, with the distance measuring equipment zeroing, sets spacing distance and spacing power value;
Step 7, allow the servomotor charger load constant or alternate load power;
Step 8, device for measuring force and distance measuring equipment obtain test figure, and by the data acquisition system (DAS) record.
Be illustrated in figure 4 as the fixture external member 25 of the present embodiment, fixture external member 25 is three-point bending fixture external member, can realize the theoretical model of three-point bending, precision is high, can fully contact with environmental gas, as shown in Figure 4, comprise locating sleeve 41, single head depression bar 40, pedestal 38.Wherein, described upper support bar is embedded in described quartz ampoule upper end, is threaded connection with single head depression bar 40; Described lower support bar is embedded in described quartz ampoule lower end, is threaded connection with described pedestal 38, and two cylindrical roller 39 are embedded on pedestal 38, forms two fulcrums of sample, and pedestal 38 has part to hollow out between two cylindrical roller 39, is beneficial to sample deformation.Microbend sample 42 is placed on cylindrical roller 39, and two ends embed approximately 0.5mm of fixture, drips wax and fixes.Pedestal 38 has internal thread, is connected with lower support bar.Single head depression bar 40 outsides have part to prune, and conveniently coordinate with locating sleeve 41.Locating sleeve 41 is enclosed within on pedestal 38, and the center section indent can coordinate with pedestal 38, and leave certain altitude.Locating sleeve 41 sides have out small sircle hole to be connected connection with draft tube, are convenient to environmental gas and contact with microbend sample 42.Have oblong shaped orifices in the middle of locating sleeve 41, single head depression bar 40 is positioned, single head depression bar 40 has a pressure head, can pass aperture and contact with microbend sample 42, guarantees the verticality of single head depression bar 40 and microbend sample 42.
The step that the present embodiment carries out little Three Point Bending Creep Test is as follows:
In step 1, the fixture with microbend sample 42 embedding clamping mechanisms, locating sleeve 41 is enclosed within on fixture, thermopair is attached on fixture;
Step 4, with device for measuring force zeroing, fine setting servomotor charger is moved upward to when sample contact with depression bar lower support bar and stops, and distance measuring equipment is returned to zero, set spacing distance and with spacing power value;
Step 7, allow the servomotor charger load constant or alternate load power;
Step 8, device for measuring force and distance measuring equipment obtain test figure, and by the data acquisition system (DAS) record.
Embodiment 4
The present embodiment is substantially the same manner as Example 3, and difference only is, described fixture external member is four-point bending fixture external member, and structure as shown in Figure 5.Four-point bending fixture external member can realize the theoretical model of four-point bending, and precision is high, can fully contact with environmental gas.Basic identical with three-point bending fixture external member structure, difference is double end depression bar 44 and locating sleeve 45, has two oblong shaped orifices in the middle of the locating sleeve 45 of four-point bending, and double end depression bar 44 has two pressure heads.
Although more than described the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is limited by appended claims.Those skilled in the art can make various changes or modifications to these embodiments under the prerequisite that does not deviate from principle of the present invention and essence, but these changes and modification all fall into protection scope of the present invention.
Claims (13)
1. a micro-test sample creep, creep fatigue pilot system, it is characterized in that, described micro-test sample creep, creep fatigue pilot system comprise main machine frame, high temperature furnace, servomotor charger, distance measuring equipment, device for measuring force, cooling system, clamping mechanism, quartz ampoule, feeder, computer control system and data acquisition system (DAS), wherein
Described main machine frame comprises base, an entablature, a middle cross beam and two root posts;
Described servomotor charger is arranged on described main machine frame base, and described middle cross beam is passed in its upper end, and coordinates with an orienting sleeve that is nested on described middle cross beam;
Described device for measuring force is connected with described servomotor charger, and is arranged at the top of described servomotor charger;
Described distance measuring equipment is fixed on the middle cross beam of described main machine frame, and its sensing head is placed between described device for measuring force and cooling system;
Described cooling system is arranged at above device for measuring force, and it is cooling that described cooling system provides recirculated water to carry out by water tank;
Described clamping mechanism is arranged at above described cooling system, comprise lower support bar, be used for fixture external member and the upper support bar of clamping micro-test sample, described fixture external member is placed in described quartz ampoule, the lower end of described upper support bar is threaded with described fixture external member and is embedded in described quartz ampoule upper end, the detent mechanism that the upper end of described upper support bar and is arranged on described entablature is connected, and the upper end of described lower support bar is threaded with described fixture external member and is embedded in described quartz ampoule lower end;
Described fixture external member is stretching clamp external member, three-point bending fixture external member, four-point bending fixture external member or little punching fixture external member;
Be provided with some thermopairs that are connected with temperature controller on described fixture external member, described temperature controller is for the temperature of regulating described high temperature furnace;
Described quartz ampoule is connected with described high temperature furnace is nested, and its two ends penetrate in described high temperature furnace;
Described feeder delivers gas in the space that is made of described clamping mechanism and described quartz ampoule by draft tube.
2. micro-test sample creep as claimed in claim 1, creep fatigue pilot system, it is characterized in that, micro-test sample comprises little tensile sample and microbend sample, described microbend sample comprises little 3 curved samples, little 4 curved samples and small punching sample, wherein, the two ends of described little tensile sample respectively are provided with a convex shoulder.
3. micro-test sample creep as claimed in claim 1, creep fatigue pilot system, is characterized in that, is provided with at least one pore on described three-point bending fixture external member, four-point bending fixture external member and little punching fixture external member, wherein,
Described stretching clamp external member comprises two chucks, each described chuck respectively comprises a front mould and a rear mold that is detachably connected, described front mould and rear mold are provided with one for the groove that holds the micro-test sample convex shoulder, and described two chucks are threaded with described upper support bar and described lower support bar respectively;
Described three-point bending fixture external member comprises that a top is provided with the single head depression bar that pedestal and that the locating sleeve of a pilot hole, is arranged at described locating sleeve below has a pressure head, the size shape of the xsect of described pressure head is identical with the size shape of described pilot hole, described pressure head passes described pilot hole, and contact with micro-test sample on being placed in described pedestal, described pedestal and described lower support bar are threaded, and described single head depression bar and described upper support bar are threaded;
Described four-point bending fixture external member comprises that a top is provided with the double end depression bar that pedestal and that the locating sleeve of two pilot holes, is arranged at described locating sleeve below has two pressure heads, the size shape of the xsect of described pressure head is identical with the size shape of described pilot hole, described pressure head passes described pilot hole, and contact with micro-test sample on being placed in described pedestal, described pedestal and described lower support bar are threaded, and described double end depression bar and described upper support bar are threaded;
Described little punching fixture external member comprises a top be provided with the locating sleeve of a pilot hole, a pedestal that is arranged at described locating sleeve below, the single head depression bar that a pressure ball and has a pressure head, the size shape of the xsect of described pressure head is identical with the size shape of described pilot hole, described pressure head passes described pilot hole, and contact with described pressure ball on being placed in micro-test sample, described pedestal and described lower support bar are threaded, and described single head depression bar and described upper support bar are threaded.
4. micro-test sample creep as claimed in claim 1, creep fatigue pilot system, it is characterized in that, described feeder comprises gas cylinder or a steam generating system that is connected with described draft tube, institute's draft tube is provided with flowmeter and is used for controlling the flow valve of gas flow, described steam generating system comprises a nitrogen gas cylinder, a water tank that is connected with described nitrogen gas cylinder and is connected the steam raising plant that is connected with described water tank, and described steam raising plant also is connected with described draft tube.
5. micro-test sample creep as claimed in claim 1, creep fatigue pilot system, is characterized in that, the partial coverage that described quartz ampoule is exposed to described high temperature furnace has insulation material.
6. micro-test sample creep as described in claim 1-5 any one, creep fatigue pilot system, it is characterized in that, described distance measuring equipment is distance measuring sensor, described device for measuring force is force cell, all be connected with computer control system, described data acquisition system (DAS) is used for recording the data of described distance measuring sensor, the measurement of described force cell.
7. micro-test sample creep as described in claim 1-5 any one, creep fatigue pilot system, it is characterized in that, described servomotor charger comprises servomotor, Timing Belt, reductor and pull bar, described servomotor drives reductor by Timing Belt, reductor drives pull bar and carries out axially-movable, and described computer control system is used for arranging creep, creep fatigue loading environment.
8. a little tensile sample creep, creep fatigue test method is characterized in that, comprising:
Step 1, the two ends of micro-test sample are embedded respectively in the groove of rear mold of chuck, the front mould that closes is connected bolt to connect with rear mold front mould, and thermopair is attached on fixture, and chuck is threaded with upper support bar and lower support bar respectively;
Step 2, quartz ampoule is enclosed within on lower support bar from top to bottom, gas can not be spilt from the bottom; Gland bonnet is inserted in upper support bar, makes the space that forms sealing between quartz ampoule and clamping mechanism;
Step 3, upper support bar is connected with support bar pin on entablature;
Step 4, with device for measuring force zeroing, fine setting servomotor charger is laid down the prestress that produces in installation process, with the distance measuring equipment zeroing, sets spacing distance and spacing power value;
Step 5, startup feeder, the adjust flux valve makes gas enter in quartz ampoule with constant flow velocity; When supply steam, with nitrogen, the oxygen in water is drained, pass into steam generator, produce saturated water vapour and send in quartz ampoule;
Step 6, unlatching high temperature furnace heat up;
Step 7, computer control system is set, determines load mode and the loading force value of servomotor charger;
Step 8, device for measuring force and distance measuring equipment obtain test figure, and by the data acquisition system (DAS) record.
9. little tensile sample creep test method as claimed in claim 8, is characterized in that, step 3 is: upper support bar is connected with support bar pin on entablature, is exposed to the high temperature furnace place at quartz ampoule and coats insulation material.
10. little tensile sample creep test method as claimed in claim 8, is characterized in that, step 7 is: allow the servomotor charger load permanent load, perhaps load triangular waveform, sinusoidal waveform or square waveform alternate load.
11. a microbend sample creep test method is characterized in that, comprising:
Step 1, micro-test sample is embedded in the fixture of clamping mechanism, locating sleeve is enclosed within on fixture, thermopair is attached on fixture;
Step 2, quartz ampoule is enclosed within on lower support bar from top to bottom, gas can not be spilt from the bottom; Upper support bar is packed in quartz ampoule from top to bottom, make the space that forms sealing between quartz ampoule and clamping mechanism;
Step 3, rotation upper support bar are fixed on upper support bar on entablature after making depression bar embed locating sleeve;
Step 4, with device for measuring force zeroing, fine setting servomotor charger is moved upward to when sample contact with depression bar lower support bar and stops, and distance measuring equipment is returned to zero, set spacing distance and with spacing power value;
Step 5, startup feeder, the adjust flux valve makes gas enter in quartz ampoule with constant flow velocity; When supply steam, with nitrogen, the oxygen in water is drained, pass into steam generator, produce saturated water vapour and send in quartz ampoule;
Step 6, unlatching high temperature furnace heat up;
Step 7, computer control system is set, determines load mode and the loading force value of servomotor charger;
Step 8, device for measuring force and distance measuring equipment obtain test figure, and by the data acquisition system (DAS) record.
12. microbend sample creep test method as claimed in claim 11 is characterized in that, step 3 is: the rotation upper support bar, upper support bar is fixed on entablature after making depression bar embed locating sleeve, and be exposed to the high temperature furnace place at quartz ampoule and coat insulation material.
13. microbend sample creep test method as claimed in claim 11 is characterized in that, step 7 is: allow the servomotor charger load permanent load, perhaps load triangular waveform, sinusoidal waveform or square waveform alternate load.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100117595A CN103105336A (en) | 2013-01-11 | 2013-01-11 | Micro sample creep and creep fatigue test system and test method |
| PCT/CN2013/075628 WO2014107941A1 (en) | 2013-01-11 | 2013-05-15 | Micro-sample creep and creep fatigue test system and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN106680121B (en) * | 2016-12-23 | 2019-08-20 | 西南交通大学 | Synchrotron radiation in situ imaging fatigue tester and its test method containing temperature control mechanism |
| CN106885664A (en) * | 2017-02-24 | 2017-06-23 | 长春机械科学研究院有限公司 | Suitable for the sag method of testing and device of vacuum environment |
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| CN110879129A (en) * | 2019-11-05 | 2020-03-13 | 昆明理工大学 | Device for testing influence of pipeline deformation on liquid flow in closed-loop pressure system |
| CN110879129B (en) * | 2019-11-05 | 2021-06-01 | 昆明理工大学 | Device for testing influence of pipeline deformation on liquid flow in closed-loop pressure system |
| CN110954411A (en) * | 2019-11-17 | 2020-04-03 | 宁波诺丁汉大学 | Novel small sample micro-tensile test device and test method thereof |
| CN113588446A (en) * | 2021-08-10 | 2021-11-02 | 中机试验装备股份有限公司 | Tensile creep test device |
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