CN201993271U - Environmental box device for slow tension stress corrosion test of rectangular section sample - Google Patents
Environmental box device for slow tension stress corrosion test of rectangular section sample Download PDFInfo
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- CN201993271U CN201993271U CN2011200930750U CN201120093075U CN201993271U CN 201993271 U CN201993271 U CN 201993271U CN 2011200930750 U CN2011200930750 U CN 2011200930750U CN 201120093075 U CN201120093075 U CN 201120093075U CN 201993271 U CN201993271 U CN 201993271U
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Abstract
The utility model relates to an environmental box device for a slow tension stress corrosion test of a rectangular section sample, which comprises a cylinder body, a base and a sealing cover. The cylinder body is fixedly connected with the base and is in movable connection with the sealing cover. An upper sealing connector which is in clearance fit with the sealing cover and capable of moving without friction is also included. An installment groove is arranged on the upper sealing connector on a portion located inside the cylinder body. The section of the installment groove adapts to the head of the rectangular sample so as to be fixedly connected with the rectangular sample. A lower sealing connector comprises an upper portion connected with the base and located inside the cylinder body, and an installment groove is arranged inside. The section of the installment groove adapts to the head of the rectangular sample so as to be fixedly connected with the rectangular sample. The upper and lower sealing connectors inside which the installment grooves with sections adapting to the rectangular sample are disposed are arranged, so that stable clamping of the plate-like sample and sealing of the cylinder body are realized. The environmental box device is easy to fabricate and process, convenient to store and install, easy to use and good in operation controllability.
Description
Technical field
The present invention is a kind of special environment casing that is suitable for the slow tensile stress etching test of square-section sample, is used for the slow tensile stress etching test of square-section sample.The stress corrosion (cracking) test technology that relates to material is specially adapted to the square-section sample at normal temperature or slow tensile stress etching test under the corrosive medium existence condition of specified temp requirement is arranged.
Background technology
Stress corrosion crack occupied larger proportion in plant equipment loses efficacy.The anti-stress corrosion performance of correct evaluation material, it is significant to improve the quality of products.
Since carrying out stress corrosion crack research from eighties of last century, multi-form sample form and corresponding testing machine have appearred, and all kinds of test methods of standard.Usually, different samples comprises at different test objectives: the limit stress σ of the susceptibility of test stress corrosion cracking, stress corrosion cracking (SCC) spreading rate (da/dt), stress corrosion crack
c, or the stress intensity factor initial value K of stress corrosion
ISCC(also being critical value).The test method of existing stress corrosion crack has following a few class substantially:
(1) test for stress corrosion cracking under the permanent displacement; (2) WOL sample; (3) test for stress corrosion cracking under the constant load; (4) the slow tension test method of constant strain rate.
Wherein, the slow tension test method of constant strain rate is with special round bar shape tensile sample or plate shaped sample, and two ends are clamped on the special cupping machine, and sample puts the environmental cabinet of corrosive medium outward, keeps constant during loading and strain rate slowly.If tested material has stress corrosion inclination to this medium, then can in continual plastic strain deformation process, germinate stress corrosion cracking (SCC), and constantly expansion, preferably impel sample to rupture.The characteristics of this test method mainly are that the people imposes on the continuous plastic strain slowly of sample, and to keep this strain rate be constant.If stress corrosion crack has taken place, the fracture of final sample is the rock-candy structure of macroscopic view, if stress corrosion crack does not take place, then finally is the plastic fracture that is formed with obvious constriction after plastic strain is quite big.This test also is called " slowly stretch " test for short, and is considered to a kind of reliable stress corrosion crack rapid testing procedure, the result accurately and reliably, the counter stress corrosion test has higher sensitivity, is particularly suitable for the rapid screening that material is carried out in the laboratory.Existing slow tensile stress etching experiment, its style all adopts the cylinder sample of two sides cutting thread so that carry out thread seal with the environment casing, its chuck shape as shown in Figure 1, one of cylinder sample embeds internal thread, the outside car of cylinder sample has external thread.But because cylinder sample is not easy to its surface is handled, so tend to limit the content and the degree of depth of research, the present invention is exactly in order to design a kind of slow tensile stress etching environmental cabinet device that can be used in the sheet sample, can be convenient to carry out all kinds of processing at specimen surface and can make itself and environmental cabinet carry out the dual purpose of excellent sealing again to reach.
Slow tensile stress etching test is because its characteristics fast and accurately are widely used in the detection of material stress corrosion dehiscence resistant ability.Stress corrosion is as the term suggests must exist stress and corrosion environment simultaneously, and Neither of the two can be dispensed.And the key issue that the slow tensile stress etching that carries out on universal tensile testing machine test faces be exactly the environment casing design and with being connected and sealing of sample, cupping machine.The present invention is directed to the difficult problem that square-section sample and environmental cabinet be difficult to be connected sealing and proposed a kind of brand-new design.
Summary of the invention
Be difficult to the difficult problem that is tightly connected with environmental cabinet for overcoming the square-section sample in the stress corrosion (cracking) test process, the technical problem to be solved in the present invention provides a kind of square-section sample stress corrosion (cracking) test environmental cabinet system.
The objective of the invention is to realize by following measure:
The slow tensile stress etching experimental enviroment of a kind of square-section sample case apparatus, comprise cylindrical shell, base, capping, cylindrical shell is affixed with base, cylindrical shell is with the removable connection of capping, also comprise the head that is tightly connected, the head that is tightly connected on this can frictionless motion with the capping clearance fit, on the head that is tightly connected go into inner barrel and be arranged with a mounting groove, the mounting groove cross section adapts with affixed with it with the rectangular specimen nose shape;
The lower seal connector comprises a top, and this lower seal connector top connects with base, and cylindrical shell is gone on lower seal connector top, and inside is provided with a mounting groove, and the mounting groove cross section adapts with affixed with it with the rectangular specimen nose shape.
Further, be tightly connected on the described rectangular specimen mounting groove and lower seal connector mounting groove cross section are greater than the sample cross section, and frontier distance is 1.5～3mm.
Further, described lower seal connector comprises that also a bottom is located under the base, and described lower seal connector top and bottom are affixed by screw thread and base.
Further, be tightly connected on described head and lower seal connector top are provided with screw, sample by bolt hole respectively with on be tightly connected and the lower seal connector fixed.
Further, the logotype of described cylindrical shell outer cover is with the ceramic heater of heating with temperature control.
Further, described capping has condensation hole or thermometer hole.
Further, be provided with in the condensation hole in order to condensing reflux to guarantee that solution concentration is kept condenser pipe constant, looping teflon adhesive tape in the cylindrical shell.
Further, be provided with stopper in the described thermometer hole or twine the thermometer of tying up band.
Further, the material of described cylindrical shell, base and capping is 2205 two phase stainless steels.
This slow tensile stress etching experimental enviroment case apparatus, it by cylindrical shell, base, capping and upper-lower seal connector totally five parts form, and can be as required at the outside ceramic heater that be connected with temperature regulating device that twines of cylindrical shell.It is characterized in that: cylindrical shell, base and capping are adopted has good heat conductivity and corrosion proof 2205 two phase stainless steel processing and fabricatings.Cylindrical shell and base adopt and are welded to connect, and adopt bolt to be connected between capping and cylindrical shell.Have the threaded hole and the through hole that feed the head that is tightly connected in base and the capping.Also have the position, hole of cut-in temperature meter and condenser pipe in the capping.The upper-lower seal connector also adopts 2205 two phase stainless steels to make.Wherein upper binding head has the rectangular specimen mounting groove, and mounting groove is consistent with specimen shape, but size extends out 1.5～3mm than sample, and this is to tie up the space that band is reserved in order to smear sealing silica gel or to twine at the sample head from now on.During installation, it is firm that through hole by the sample head and threaded hole on the chuck adopt bolt that sample is connected with chuck, under connect chuck and be divided into up and down two parts, wherein top is similar substantially to the upper grip structure, only because the lower seal connector is born the responsibility of sealed cylinder simultaneously, so adopted good sealing performance to be threaded with the cylindrical shell junction.The lower union joint bottom is divided into the conversion body of connecting cylinder body and cupping machine, need bear former also employing of big acting force and be threaded.
Beneficial effect of the present invention is:
The present invention has realized the stable holding of plate shaped sample and the problem of cylindrical shell sealing by establishing the cross section in being provided with the adapt upper and lower head that is tightly connected of mounting groove of sample, and this device is easy to make processing, deposits, easy for installation, uses simply, and operation controllability is good.
The cross sectional shape and the sample cross sectional shape of the rectangular specimen mounting groove of being opened on the lower union joint in the present invention adapt, but size extends out 1.5～3mm than sample cross section, tie up the space that band is reserved in order to smear sealing silica gel or to twine at the sample head from now on.
The present invention has adopted good sealing performance to be threaded by transformational structure and cylindrical shell and has realized that the lower seal connector is to the sealing of cylindrical shell and the heavy burden of cylindrical shell deadweight.
The present invention by the logotype of cylindrical shell overcoat with heating and the ceramic heater of temperature control to realize the corrosive liquid adjustment.
Fill in the outer looping teflon adhesive tape of condenser pipe in condensation hole among the present invention, guarantee that to carry out condensing reflux solution concentration is kept constant in the cylindrical shell.
The thermometer that the present invention fills in thermometer hole need embed stopper or twine outward ties up band, to stop up thermometer hole, volatilizees in a large number at thermometer hole to prevent solution.
Description of drawings
Fig. 1 is the chuck shape synoptic diagram of the slow tensile stress etching experiment environment box of existing cylindrical sample;
Fig. 2 is slow tensile stress etching experimental enviroment case diagrammatic cross-section;
Fig. 3 is the ratio tensile sample synoptic diagram of selecting;
Fig. 4 is the base synoptic diagram, and wherein, Fig. 4-1 is the vertical view of base, and Fig. 4-2 is the A-A cut-open view;
Fig. 5 is the capping synoptic diagram, and wherein, Fig. 5-1 is the capping vertical view, and Fig. 5-2 is the B-B cut-open view;
Fig. 6 is the cylindrical shell synoptic diagram, and wherein, Fig. 6-1 is the cylindrical shell vertical view, and Fig. 6-2 is the C-C cut-open view;
Fig. 7 synoptic diagram that is tightly connected on being, wherein, Fig. 7-1 on a front view that is tightly connected, Fig. 7-2 on a vertical view that is tightly connected, Fig. 7-3 is the D-D cut-open view;
Fig. 8 is a lower seal connector top synoptic diagram, and wherein, Fig. 8-1 is a lower seal connector top front view, and Fig. 8-2 is a lower seal connector top vertical view, and Fig. 8-3 is a lower seal connector top E-E cut-open view;
Fig. 9 is a lower seal connector bottom synoptic diagram, and wherein, Fig. 9-1 is a lower seal connector bottom front view, and Fig. 9-2 is a lower seal connector bottom vertical view.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further detail, but should limit protection scope of the present invention with this.
Environmental cabinet device of the present invention can be installed to existing universal testing machine (being cupping machine) and go up the realization loading.
Concrete enforcement participated in shown in the accompanying drawing 2～9, comprise cylindrical shell 1, base 2, capping 3, on be tightly connected 7 and the lower seal connector.Cylindrical shell 1 connects by welding technology with base 2, and cylindrical shell 1 is with capping 3 removable connections.Cylindrical shell 1 outer cover logotype is with the ceramic heater of heating with temperature control.Capping 3 can have condensation hole 10 or thermometer hole 11: be provided with in the condensation hole 10 in order to condensing reflux to guarantee that solution concentration is kept condenser pipe constant, looping teflon adhesive tape in the cylindrical shell; Be provided with stopper or twine the thermometer of tying up band in the thermometer hole (11).
On be tightly connected 7 with capping 3 clearance fit, can frictionless motion, on the head that is tightly connected go into cylindrical shell 1 inside and be arranged with a mounting groove 71, mounting groove 71 cross sections adapt with rectangular specimen 8 nose shapes and connect to carry out bolt by pilot hole with it; The lower seal connector is made up of top 5 and bottom 6, this lower seal connector top 5 connects with base 2, cylindrical shell 1 is gone on lower seal connector top 5, and inside is provided with a mounting groove 51, and mounting groove 51 cross sections adapt with rectangular specimen 8 nose shapes and connect by carry out bolt by pilot hole.Lower seal connector bottom 6 is located under the base 2, lower seal connector top 5 is affixed by screw thread and base 2 with bottom 6, has adopted good sealing performance to be threaded by transformational structure and cylindrical shell and has realized that the lower seal connector is to the sealing of cylindrical shell and the heavy burden of cylindrical shell deadweight.
Being tightly connected on the rectangular specimen, slightly cross sections are greater than sample 8 cross sections for a mounting groove 71 and lower seal connector mounting groove 51, and frontier distance is 1.5～3mm, think that the sample head is smeared sealing silica gel or twined to tie up the band headspace.
During use, bottom and the lower seal connector top 5 with sample 8 is connected and fixed by bolt hole 9 earlier, tightens fixing by screw thread and base lower seal connector top 5 and bottom 6 then.At this moment the environment casing can be placed on the universal testing machine and by lower chuck bottom 6 and be fixedly clamped.After fixing cylindrical shell, with sample 8 with on be tightly connected and 7 be connected and fixed by bolt hole 9.Inject corrosion environment liquid, liquid level should guarantee that the sample parallel-segment is immersed in the solution all the time in loading procedure.If corrosive liquid has temperature requirement, the ceramic heater that can be connected with temperature regulating device on cylindrical shell 1 outer cover heats and temperature control.After above-mentioned steps is finished capping 3 and cylindrical shell 1 are sealed by bolt 4.Be tightly connected wherein 7 and capping 3 between be clearance fit, can guarantee that the two can make not have friction slip as long as the gap is minimum.Can have thermometer hole 11 as required in the capping 3, thermometer be embedded the stopper latter twine to tie up and fill in hole 11 behind the band again and carry out thermometric and prevent that solution from volatilizing in a large number at thermometer hole.Fill in condensation hole 10 behind the condenser pipe looping teflon adhesive tape and carry out condensing reflux to guarantee that solution concentration is kept constant in the cylindrical shell.Size extends out 1.5～3mm than sample cross section.
Loading procedure is by 7 a upwards stretching realization that are tightly connected in the universal tensile testing machine clamping, and the test rate of extension should meet the regulation of testing for slow strain rate tension among the GB-T15970.7-2000, and scope is 10
-1～10
-7S
-1, preferential usually on probation 10
-6S
-1
The advantage that apparatus of the present invention compared with prior art have is:
1, designs a kind of rational mechanism, when using the square-section sample to do slow tension test, guaranteed good test stability and cylindrical shell sealing property.
2, be easy to make processing, deposit, easy for installation, use simply, operation controllability is good.
The above is preferred embodiment of the present invention only, is not to be used for limiting practical range of the present invention.Be that all equivalences of being done according to the present patent application claim content change and modification, all should be technology category of the present invention.
Claims (9)
1. the environmental cabinet device of the slow tensile stress etching test of square-section sample comprises cylindrical shell (1), base (2), capping (3), and the same base of cylindrical shell (1) (2) is affixed, and the removable connection of the same capping of cylindrical shell (1) (3) is characterized in that, also comprises
On be tightly connected the head (7), head (7) same capping (3) clearance fit is tightly connected on being somebody's turn to do, can frictionless motion, on the head that is tightly connected go into cylindrical shell (1) inside and be arranged with a mounting groove (71), the same rectangular specimen in mounting groove (71) cross section (8) nose shape adapts with affixed with it;
The lower seal connector comprises a top (5), this same base in lower seal connector top (5) (2) connects, cylindrical shell (1) is gone on lower seal connector top (5), and inside is provided with a mounting groove (51), and the same rectangular specimen in mounting groove (51) cross section (8) nose shape adapts with affixed with it.
2. the slow tensile stress etching experimental enviroment of square-section according to claim 1 sample case apparatus, it is characterized in that, a mounting groove (71) and lower seal connector mounting groove (51) cross section be tightly connected on the described rectangular specimen greater than sample (8) cross section, and frontier distance is 1.5～3mm.
3. the slow tensile stress etching experimental enviroment of square-section according to claim 1 sample case apparatus, it is characterized in that, described lower seal connector comprises that also a bottom (6) is located under the base (2), and described lower seal connector top (5) is affixed by screw thread and base (2) with bottom (6).
4. the slow tensile stress etching experimental enviroment of square-section according to claim 1 sample case apparatus, it is characterized in that, be tightly connected on described head (7) and lower seal connector top (5) is provided with screw (9), sample (8) by bolt hole (9) respectively with on be tightly connected (7) and lower seal connector (5) affixed.
5. according to the slow tensile stress etching experimental enviroment of arbitrary described square-section sample case apparatus in the claim 1～5, it is characterized in that described cylindrical shell (1) outer cover logotype is with the ceramic heater of heating with temperature control.
6. according to the slow tensile stress etching experimental enviroment of arbitrary described square-section sample case apparatus in the claim 1～5, it is characterized in that described capping (3) has condensation hole (10) or thermometer hole (11).
7. according to the slow tensile stress etching experimental enviroment of the sample of square-section described in the claim 6 case apparatus, it is characterized in that, be provided with in condensation hole (10) in order to condensing reflux to guarantee that solution concentration is kept condenser pipe constant, looping teflon adhesive tape in the cylindrical shell.
8. according to the slow tensile stress etching experimental enviroment of the sample of square-section described in the claim 7 case apparatus, it is characterized in that, be provided with stopper or twine the thermometer of tying up band in the described thermometer hole (11).
9. according to the slow tensile stress etching experimental enviroment of arbitrary described square-section sample case apparatus in the claim 1～5, it is characterized in that the material of described cylindrical shell, base and capping is 2205 two phase stainless steels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200930750U CN201993271U (en) | 2011-04-01 | 2011-04-01 | Environmental box device for slow tension stress corrosion test of rectangular section sample |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200930750U CN201993271U (en) | 2011-04-01 | 2011-04-01 | Environmental box device for slow tension stress corrosion test of rectangular section sample |
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| CN201993271U true CN201993271U (en) | 2011-09-28 |
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| CN2011200930750U Expired - Fee Related CN201993271U (en) | 2011-04-01 | 2011-04-01 | Environmental box device for slow tension stress corrosion test of rectangular section sample |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103018097A (en) * | 2012-12-10 | 2013-04-03 | 上海锅炉厂有限公司 | Simple tensile test tool for tube-tube plate and manufacturing technology thereof |
| CN103115816A (en) * | 2011-11-17 | 2013-05-22 | 江苏亚星锚链股份有限公司 | Slow strain rate test method and device for R6-stage mooring cable |
| CN104807711A (en) * | 2015-04-21 | 2015-07-29 | 中信重工机械股份有限公司 | Corrosion fatigue test device |
| CN104931369A (en) * | 2015-07-08 | 2015-09-23 | 华东交通大学 | Subway steel bar erosion and tension fatigue coupling test device |
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| JP2018096890A (en) * | 2016-12-15 | 2018-06-21 | Ｊｆｅスチール株式会社 | Sulphide stress corrosion crack testing method of steel material |
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| CN109444029A (en) * | 2018-09-30 | 2019-03-08 | 山东省分析测试中心 | A kind of fatigue test environment simulator |
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| WO2021013116A1 (en) * | 2019-07-23 | 2021-01-28 | 西安热工研究院有限公司 | High-temperature and high-pressure water slow tensile stress corrosion test system for metal tube full-tube sample |
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2011
- 2011-04-01 CN CN2011200930750U patent/CN201993271U/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103115816A (en) * | 2011-11-17 | 2013-05-22 | 江苏亚星锚链股份有限公司 | Slow strain rate test method and device for R6-stage mooring cable |
| CN103018097A (en) * | 2012-12-10 | 2013-04-03 | 上海锅炉厂有限公司 | Simple tensile test tool for tube-tube plate and manufacturing technology thereof |
| CN103018097B (en) * | 2012-12-10 | 2016-04-06 | 上海锅炉厂有限公司 | A kind of simple and easy tube-tube plate tension test frock and processing technology thereof |
| CN104807711A (en) * | 2015-04-21 | 2015-07-29 | 中信重工机械股份有限公司 | Corrosion fatigue test device |
| CN104931369A (en) * | 2015-07-08 | 2015-09-23 | 华东交通大学 | Subway steel bar erosion and tension fatigue coupling test device |
| CN105547853A (en) * | 2015-11-20 | 2016-05-04 | 江南大学 | Apparatus capable of testing stress-strain curve of fluid |
| JP2018096890A (en) * | 2016-12-15 | 2018-06-21 | Ｊｆｅスチール株式会社 | Sulphide stress corrosion crack testing method of steel material |
| CN108844810A (en) * | 2018-05-29 | 2018-11-20 | 西安热工研究院有限公司 | A kind of full pipe sample stress-rupture tester fixture of small diameter metal thin-wall tube |
| CN109444029A (en) * | 2018-09-30 | 2019-03-08 | 山东省分析测试中心 | A kind of fatigue test environment simulator |
| CN109520873A (en) * | 2018-12-21 | 2019-03-26 | 南京工程学院 | A kind of slow Compression and Expansion device to be slowed down based on chain pitch wheel |
| CN109520873B (en) * | 2018-12-21 | 2024-01-26 | 南京工程学院 | Slow stretching compression device based on chain gear reduction |
| WO2021013116A1 (en) * | 2019-07-23 | 2021-01-28 | 西安热工研究院有限公司 | High-temperature and high-pressure water slow tensile stress corrosion test system for metal tube full-tube sample |
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Granted publication date: 20110928 Termination date: 20130401 |