CN204188503U - A kind of metal material stress corrosion (cracking) test charger - Google Patents
A kind of metal material stress corrosion (cracking) test charger Download PDFInfo
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- CN204188503U CN204188503U CN201420675892.0U CN201420675892U CN204188503U CN 204188503 U CN204188503 U CN 204188503U CN 201420675892 U CN201420675892 U CN 201420675892U CN 204188503 U CN204188503 U CN 204188503U
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Abstract
The utility model relates to material mechanical performance technical field, is specifically related to a kind of metal material stress corrosion (cracking) test charger.Comprise pedestal, two loading blocks, pin, nut, guide rail and testpieces; Testpieces surface mount has strain measurement element; Two sidewalls of pedestal symmetry have coaxial through hole and are provided with guide rail; Two loading blocks are each passed through the through hole of pedestal two ends sidewall and expose; Testpieces two ends are arranged on respectively in two loading blocks grooves, by pin through testpieces and loading blocks; At the male thread portion mounting nuts of loading blocks.Beneficial effect: the stress corrosion (cracking) test test of metallographictest part under pure extension stress can be realized, the accurate control of stress level can be realized by adopting strain measurement element and carry out while testing in enormous quantities, the mode of complete immersion can be adopted to study, and test figure can the anti-stress corrosion performance of more effective reacting metal material.
Description
Technical field
The utility model relates to material mechanical performance technical field, is specifically related to a kind of metal material stress corrosion (cracking) test charger.
Background technology
When metal material is in Korrosionsmedium for a long time, when itself there is again certain effect of stress simultaneously, its corrosion rate is usually than faster under unstressed operative condition, its life-span is shorter, therefore, carrying out research for the stress corrosion performance of metal material is guarantee to be in corrosion environment structural safety Key experiments.
Mainly include constant load method for stress corrosion (cracking) test at present, permanent distortion/Strain Method eases up slow rate pulling method etc., often kind of method has its scope of application and test emphasis, wherein constant load method adopts lever principle to apply a certain permanent load usually, testing equipment is comparatively large, is usually applicable to a small amount of test; Permanent distortion/Strain Method applies certain distortion or strain by certain charger, and then carry out immersion and load, the method can prepare a large amount of charger, can carry out soak test in enormous quantities; Slow rate tensile method is that test specimen is placed in corrosion environment, adopts high precision loading tester to carry out Slow loading simultaneously, and strain rate is generally within 1 × 10-6/s, and the Sensitivity of Stress Corrosion of main research metal material, is applicable to a small amount of test usually.
The mode that original permanent distortion/strain loading device have employed three-point bending loads, loading stress level is determined by 3 curved formula, due to the frequent out of true of the measurement of sag, thus the usual out of true of loaded load, strain can be detected by pasting strain transducer, reaching loading effect; Also have some to adopt the special shape sample such as U-shaped, Ω shape, adopt the simple mechanisms such as bolt to load, its principle is also apply stress by applying certain bending load.The control of this method counter stress is under normal circumstances not accurate enough, and specimen cross section upper stress is uneven simultaneously, and after corrosion cracking expansion, the impact of counter stress state is comparatively large, is unfavorable for the analysis of test findings.Therefore, need to propose a kind of novel metal material stress corrosion (cracking) test charger, the pure extension that can realize sample loads.
Summary of the invention
The purpose of this utility model is to provide a kind of metal material stress corrosion (cracking) test charger, realize the stress corrosion (cracking) test when perseverance of metal material is out of shape/is strained under pure extension stress state in enormous quantities, solve sample section stress state uniformity problem in metal material stress corrosion (cracking) test.
Realize the technical scheme of the utility model object:
A kind of metal material stress corrosion (cracking) test charger, comprises pedestal, two loading blocks, pin, nut, guide rail and testpieces;
The two ends of testpieces have through hole as loading hole, and shape and the pin of loading hole adapt, and surface mount has strain measurement element, also have precrack in the middle of testpieces; Two sidewalls of pedestal symmetry have coaxial through hole, are provided with guide rail in through hole; One end of loading blocks has groove, and also have perpendicular to the pin mounting hole also through groove, the other end is cylindrical, and has external thread; Two loading blocks are each passed through the through hole of pedestal two ends sidewall, and expose the external thread of loading blocks; Testpieces two ends are arranged on respectively in the groove of two loading blocks, are passed the pin mounting hole of testpieces and loading blocks by pin; At the male thread portion mounting nuts of loading blocks.
The through hole that two sidewalls of described pedestal symmetry are opened is square opening, and it is square that loading blocks opens reeded one end profile, adapts with the square opening shape of pedestal sidewall.
Between the external thread of described loading blocks and nut, pad is installed.
Described nut is the nut with auto-lock function.
Guide rail on described pedestal, the external thread in loading blocks and nut and pad gap are all lubricated.
The beneficial effects of the utility model are: the technical solution of the utility model can realize the stress corrosion (cracking) test test under the pure extension stress of metallographictest part, by the accurate control adopting strain transducer can realize stress level, this device is carried out while can realizing test in enormous quantities, the mode of complete immersion can be adopted to study, test figure can the anti-stress corrosion performance of more effective reacting metal material, and device provided by the utility model can be widely used in the study of stress corrosion testing of metal material.
Accompanying drawing explanation
Fig. 1 is the wiring layout of device described in the utility model
Fig. 2 is the loading principle figure of device described in the utility model
Fig. 3 is the base construction schematic diagram of device described in the utility model
Fig. 4 is the loading blocks structural representation of device described in the utility model
Fig. 5 is the suggestion testpieces schematic diagram of device described in the utility model
In figure, 1-pedestal, 2-loading blocks, 3-pin, 4-pad, 5-nut, 6-guide rail, 7-testpieces.
Embodiment
Think example below, in conjunction with the accompanying drawings and embodiments the utility model is further described.
A kind of metal material stress corrosion (cracking) test charger, its structure as depicted in figs. 1 and 2, comprises pedestal 1, two loading blocks 2, two pins 3, two pads 4 and two nuts 5.
The testpieces 7 that the present embodiment adopts is rectangular sheet, and as shown in Figure 5, two ends have through hole as loading hole to its shape, and shape and the pin 3 of loading hole adapt, and has precrack in the middle of testpieces 7; Testpieces 7 surface mount has strain measurement element, for measuring the stress be carried on testpieces 7; The strain transducer of the strain measurement element in the present embodiment;
Pedestal 1 is the support section of the present embodiment charger, its shape as shown in Figure 3, can be rectangular parallelepiped framed structure, one side with reeded rectangular parallelepiped or polyhedron, have two parallel and be positioned at the vertical panel of on same axis two pieces, two sidewall centers symmetrical in pedestal 1 have coaxial square through hole, are provided with guide rail 6 in through hole;
As shown in Figure 4, loading blocks 2 has a rectangular parallelepiped end and a cylindrical end; Axis direction along loading blocks 2 has groove in the outer end of rectangular parallelepiped, has the pin mounting hole perpendicular to axis in the reeded part of rectangular parallelepiped tool, for installing pin 3; Columniform outer end has external thread;
The rectangular parallelepiped end of two loading blocks 2 inserts in the square through hole at sidewall center, pedestal 1 two ends respectively, and exposes the external thread of loading blocks 2 cylindrical end; Testpieces 7 is arranged in the rectangular parallelepiped end groove of two loading blocks 2, is connected with loading blocks 2 through testpieces 7 by pin 3; The external thread of loading blocks 2 cylindrical end stretches out the outside of pedestal 1, and after installation pad 4, mounting nuts 5 can drive loading blocks 2 mobile to pedestal 1 outside by fastening nut 5, applies tensile loads by pin 3 pairs of testpieces.
Guide rail on pedestal 1 described in the present embodiment is coaxial, ensures that loading blocks 2 is coaxial, can not produce inclined square to loading.
Testpieces described in the present embodiment is connected with loading blocks 2 by pin 3, can not produce additional bending moment.
Loading blocks 2 described in the present embodiment coordinates with the guide rail on pedestal 1, and owing to being square rail, therefore loading at employing nut 5 is to rotate, and therefore can not apply moment of torsion to testpieces.
Nut 5 described in the present embodiment is the nuts with auto-lock function.
The testpieces 7 of device described in the present embodiment is connected with charger by two ends loading hole, adopts precrack form accelerated stress corrosion test in the middle part of testpieces, shortens test period.
Device described in the present embodiment is tackled the guide rail on pedestal 1, the screw thread in loading blocks 2 and nut 5 in use and is lubricated with pad 4 gap, convenient loading, can consider to adopt other locking measures to ensure that loadings can not relax simultaneously.
The metal material stress corrosion (cracking) test charger of the present embodiment can realize the pure extension loading of sample, ensure the homogeneity of specimen cross section load, by at testpieces 7 surface mount strain measurement element, the accurate loading strained can be accomplished, in order to accelerated stress corrosion test, usual employing is containing the test of precrack, and precrack is the crackle of impenetrating thickness, adopts enough devices can carry out complete immersion test in enormous quantities.
Obviously, those skilled in the art can carry out various change and modification to the present embodiment and not depart from spirit and scope of the present utility model.If these amendments and modification belong within the scope of the utility model claim and equivalent technologies thereof, then the utility model is also intended to comprise these change and modification.
Claims (5)
1. a metal material stress corrosion (cracking) test charger, is characterized in that: comprise pedestal (1), two loading blocks (2), pin (3), nut (5), guide rail (6) and testpieces (7);
The two ends of testpieces (7) have through hole as loading hole, and the shape of loading hole and pin (3) adapt, and surface mount has strain measurement element, also have precrack in the middle of testpieces (7); Two sidewalls of pedestal (1) symmetry have coaxial through hole, are provided with guide rail (6) in through hole; One end of loading blocks (2) has groove, and also have perpendicular to the pin mounting hole also through groove, the other end is cylindrical, and has external thread; Two loading blocks (2) are each passed through the through hole of pedestal (1) two ends sidewall, and expose the external thread of loading blocks (2); Testpieces (7) two ends are arranged on respectively in the groove of two loading blocks (2), by the pin mounting hole of pin (3) through testpieces (7) and loading blocks (2); At the male thread portion mounting nuts (5) of loading blocks (2).
2. a kind of metal material stress corrosion (cracking) test charger as claimed in claim 1, it is characterized in that: the through hole that two sidewalls of described pedestal (1) symmetry are opened is square opening, it is square that loading blocks (2) opens reeded one end profile, adapts with the square opening shape of pedestal (1) sidewall.
3. a kind of metal material stress corrosion (cracking) test charger as claimed in claim 1, is characterized in that: be provided with pad (4) between the external thread of described loading blocks (2) and nut (5).
4. a kind of metal material stress corrosion (cracking) test charger as claimed in claim 1, is characterized in that: described nut (5) is the nut with auto-lock function.
5. a kind of metal material stress corrosion (cracking) test charger as claimed in claim 1, is characterized in that: the external thread in the guide rail on described pedestal (1), loading blocks (2) and nut (5) all lubricate with pad (4) gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420675892.0U CN204188503U (en) | 2014-11-06 | 2014-11-06 | A kind of metal material stress corrosion (cracking) test charger |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420675892.0U CN204188503U (en) | 2014-11-06 | 2014-11-06 | A kind of metal material stress corrosion (cracking) test charger |
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| CN204188503U true CN204188503U (en) | 2015-03-04 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104697873A (en) * | 2015-03-06 | 2015-06-10 | 合肥通用机械研究院 | Sulfide stress corrosion cracking testing apparatus |
| CN104931372A (en) * | 2015-06-03 | 2015-09-23 | 中国石油大学(华东) | Experimental method for simulating stress corrosion of metal material under working conditions |
| CN105021455A (en) * | 2015-06-03 | 2015-11-04 | 中国石油大学(华东) | Experimental apparatus for simulating stress corrosion of metal material under actual working conditions |
| CN105136596A (en) * | 2015-07-20 | 2015-12-09 | 西安科技大学 | Crack tip stress corrosion cracking situation test system and crack tip stress corrosion cracking situation test method having constant-displacement load |
| CN105738206A (en) * | 2016-03-29 | 2016-07-06 | 北京工业大学 | Mini-type bidirectional stress loading device |
| CN105891099A (en) * | 2016-06-16 | 2016-08-24 | 天津大学 | Experimental method and device for welding joint force-corrosion coupling test |
| CN107345878A (en) * | 2017-07-25 | 2017-11-14 | 淮北庆荣高光建筑科技有限公司 | A kind of aluminium alloy plate tensile property test device being located in sodium chloride solution |
| CN110160863A (en) * | 2019-05-24 | 2019-08-23 | 西北工业大学 | A kind of composite laminated plate shock-testing special fixture applying pretension |
| CN113281154A (en) * | 2021-05-28 | 2021-08-20 | 清华大学 | Steel uniaxial tensile stress corrosion test force transmission clamp and device |
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2014
- 2014-11-06 CN CN201420675892.0U patent/CN204188503U/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104697873B (en) * | 2015-03-06 | 2017-08-25 | 合肥通用机械研究院 | A kind of sulfide-stress cracking experimental rig |
| CN104697873A (en) * | 2015-03-06 | 2015-06-10 | 合肥通用机械研究院 | Sulfide stress corrosion cracking testing apparatus |
| CN104931372A (en) * | 2015-06-03 | 2015-09-23 | 中国石油大学(华东) | Experimental method for simulating stress corrosion of metal material under working conditions |
| CN105021455A (en) * | 2015-06-03 | 2015-11-04 | 中国石油大学(华东) | Experimental apparatus for simulating stress corrosion of metal material under actual working conditions |
| CN105136596A (en) * | 2015-07-20 | 2015-12-09 | 西安科技大学 | Crack tip stress corrosion cracking situation test system and crack tip stress corrosion cracking situation test method having constant-displacement load |
| CN105738206A (en) * | 2016-03-29 | 2016-07-06 | 北京工业大学 | Mini-type bidirectional stress loading device |
| CN105891099A (en) * | 2016-06-16 | 2016-08-24 | 天津大学 | Experimental method and device for welding joint force-corrosion coupling test |
| CN105891099B (en) * | 2016-06-16 | 2018-08-31 | 天津大学 | Experimental method and device for welding joint force-corrosion coupling test |
| CN107345878A (en) * | 2017-07-25 | 2017-11-14 | 淮北庆荣高光建筑科技有限公司 | A kind of aluminium alloy plate tensile property test device being located in sodium chloride solution |
| CN107345878B (en) * | 2017-07-25 | 2019-07-30 | 安徽中嘉环保建材科技有限公司 | A kind of aluminium alloy plate tensile property test device in sodium chloride solution |
| CN110160863A (en) * | 2019-05-24 | 2019-08-23 | 西北工业大学 | A kind of composite laminated plate shock-testing special fixture applying pretension |
| CN110160863B (en) * | 2019-05-24 | 2021-12-03 | 西北工业大学 | Composite material laminated plate impact test special fixture capable of applying pretension force |
| CN113281154A (en) * | 2021-05-28 | 2021-08-20 | 清华大学 | Steel uniaxial tensile stress corrosion test force transmission clamp and device |
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