CN103983507A - A test device of high temperature stress corrosion of a large-size specimen - Google Patents
A test device of high temperature stress corrosion of a large-size specimen Download PDFInfo
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- CN103983507A CN103983507A CN201410174129.4A CN201410174129A CN103983507A CN 103983507 A CN103983507 A CN 103983507A CN 201410174129 A CN201410174129 A CN 201410174129A CN 103983507 A CN103983507 A CN 103983507A
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Abstract
A test device of stress corrosion sensitivity in high temperature solution medium of a large-size specimen is provided. The test device consists of a stainless steel electric heating plate, a condensation reflux pipe, a variable diameter ground joint, a glass container, a specimen champing fixture and a disc-shaped glass bracket. A corrosive medium, the specimen champing fixture and a specimen are added into the stress corrosion glass container, circulation cooling water is added into the condensation reflux pipe to achieve an effect of cooling reflux, the top end of the glass container is communicated with the bottom end of the condensation reflux pipe by the variable diameter glass ground joint, the glass container has a high temperature resistance of 1000 DEG C, the size and material of the lager-size specimen champing fixture are decided by specimen loading requirements and specimen materials. The device is of simple structure, is of easy operation, is of accurate test result, is convenient for immediate observation and recording of the state of stress corrosion of the specimen, has a small size, is suitable for promotion and use in research laboratories, and can be widely used in the fields of large-scale industrial production and test analysis of Iron and steel and nonferrous metals.
Description
Technical field
The present invention relates to a kind of stress corrosion testing device, particularly a kind of large dimension specimen high temperature stress corrosion experimental device, can be used for the detection of material anticorrosion stress-resistant cracking sensitivity under hot conditions.
Technical background
Stress corrosion is the failure phenomenon that material, mechanical component or member produce under the acting in conjunction of static stress and corrosion.Stress corrosion causes the fracture of material to be called stress corrosion fracture.It often comes across in high-strength aluminum alloy and stainless steel.Stress corrosion research is the key areas of equipment anticorrosion and safe and reliable Journal of Sex Research, and stress corrosion testing device is the important foundation device of research stress corrosion process and mechanism.
Due to the unpredictability of stress corrosion crack, if sample ftractures, determine in time and record macroscopic cracking time of origin, sample penetration of cracks time.For ease of the corrosion cracking situation of immediate observation sample.So should power corrosion device be vertical nearly cylindrical glass container for loading constant strain sample holder stationary device employing main body section.When requirement of experiment is in the time that high temperature corrosion medium carries out in as fluidizing chlorination sodium solution or fluidizing chlorination magnesium solution, during due to high temperature, in solution, the evaporation of moisture can cause the change of corrosive medium solubility, will certainly impact experiment accuracy, reduce the accuracy of test findings.So necessary appropriate design condensation reflux unit, the condensation effect of guarantee boil-off gas, reduces the gasification loss of corrosive medium to greatest extent.Simple glass container bore is less, can only be applicable to the detection of the Sensitivity of Stress Corrosion of small size sample, in order to facilitate the observation that picks and places of sample, described stress corrosion glass container adopts heavy caliber glass container, and general condensing reflux pipe cannot directly mate, the joint and seal of condensing reflux pipe and glass container is by the quality of direct relation condensation effect.The fixture that sample is loaded wants the constant strain loading that can maintain sample to avoid again the bimetallic corrosion causing because of the difference of material.
Summary of the invention
Object of the present invention is exactly to solve the technological difficulties that common stress corrosion testing device cannot be put into large dimension specimen and carries out stress corrosion (cracking) test, facilitate the corrosion cracking situation of immediate observation sample simultaneously, overcome variation and the impact of other corrosion types on sample stress corrosion (cracking) test process and result of high temperature corrosion concentration of medium, a set of large dimension specimen Sensitivity of Stress Corrosion pick-up unit in high temperature corrosion medium is provided.Have simple in structure, easy to operate, the measurement result advantage such as accurately and reliably.
The present invention is achieved through the following technical solutions:
A kind of large dimension specimen high temperature stress corrosion experimental device, is characterized in that: comprise that stainless steel electric boiling plate, condensing reflux pipe, reducing ground connection, glass container, constant strain sample accommodate fixture, disc glass supporter; Glass container is placed on stainless steel electric boiling plate top, is placed with corrosive medium, disc glass supporter, constant strain sample blessing fixture and sample in glass container.Glass container, condensing reflux pipe are realized and being tightly connected by reducing ground connection; Sample accommodates fixture and base is same material, is placed on disc glass supporter top.Condensing reflux pipe passes into cooling circulating water and reaches cooling for reflux effect.
Further, described a kind of large dimension specimen high temperature stress corrosion experimental device device, is characterized in that: wherein glass container is for closely cylindrical, and glass container upper end is communicated with condensing reflux pipe lower end by reducing ground glass joint.
Further, described large scale, constant strain sample accommodate fixture, it is characterized in that: the fixture that large dimension specimen is corresponding, and jig Design is flexible and changeable, and its size and material load requirement and material is determined because of sample.
Constant strain sample accommodates clamp base has level to extending support plate, and fixture can be steadily firmly sitting on glass supporter, and constant strain sample holder fixture can clamp 3 and above sample simultaneously, and specimen size is 130 × 15 × 3mm.
Further, described a kind of large dimension specimen high temperature stress corrosion experimental device, is characterized in that: install all high temperature resistantly with glass container, heatproof is greater than 1000 DEG C.
Beneficial effect of the present invention is mainly reflected in: (1) selected glass container is high temperature resistant 1000 DEG C; (2) glass container bore is large, is convenient to picking and placeing of large dimension specimen, and main body section is straight wall, convenient to sample corrosion cracking situation immediate observation.(3) wherein circular glass container, condensing reflux pipe are realized and being tightly connected by reducing ground connection.Sealing is good, effectively reduces distributing of water vapor, and greatly degree maintains the constant of corrosive medium solubility.(4) large dimension specimen has corresponding fixture, and jig Design can be flexible and changeable, and its size and material are determined because sample loads requirement and material.
Brief description of the drawings
Fig. 1 is one-piece construction schematic diagram of the present invention;
In figure, Reference numeral is: stainless steel electric boiling plate 1, condensing reflux pipe 2, reducing ground connection 3, glass container 4, constant strain sample accommodate fixture 5, disc glass supporter 6.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described further.
With reference to Fig. 1, a kind of large dimension specimen high temperature stress corrosion experimental device, comprise the glass container 4 that loads sample for placing stress etching experiment, described device also comprises constant strain sample holder fixture 5, condensation reflux unit 2, reducing ground connection 3, described cylindrical glass container 4, condensing reflux pipe 2 are realized and being tightly connected by reducing ground connection 3, and sealing is good.Described stress corrosion glass container 4 is placed on stainless steel electric boiling plate 1 top, and it is same material integrated design with base that described, constant strain sample accommodates fixture 5, is placed on disc glass supporter 6 tops.
Described cylindrical glass container 4, adopts heavy caliber glass container, is convenient to picking and placeing of large dimension specimen, and main body section is straight wall, convenient to sample cracking situation immediate observation.Described condenser pipe 2 is provided with water inlet, water stream channel and water delivering orifice, and cooled region length reaches 50cm, and cooling effect is good.Described condenser pipe connects cooling water circulating device.It is changeable that described constant strain sample loads fixture 5 flexible designs, and its size and material load requirement and material is determined because of sample.
Start before experiment, first the etchant solution configuring is contained in 4, disc glass supporter 6 is positioned over the bottom of glass container 4, fill in container 4 with the reducing ground connection 3 that is connecting condensing reflux pipe 2, in condenser pipe, pass into condensate water, set electric boiling plate 1 temperature, open heating plate switch, reach after requirement of experiment a period of time until the interior solution temperature of glass container 4, condensate water stops, take off the reducing ground connection that is connected with condenser pipe, by the ready large scale that is loaded with, constant strain specimen holder 5 is put into glass container 4 fast, adjust sample orientation, so that observe, connect reducing ground connection, in condenser pipe, pass into condensate water.Experiment starts.
The device of the present embodiment is applicable to the high temperature stress corrosion experiment of large dimension specimen, is equally applicable to small size sample high temperature stress corrosion experiment.Load mode adopts constant strain load mode, certainly, is also applicable to other stress loading modes.
Claims (5)
1. a large dimension specimen high temperature stress corrosion experimental device, is characterized in that: comprise stainless steel electric boiling plate (1), condensing reflux pipe (2), reducing ground connection (3), glass container (4), constant strain sample holder fixture (5), disc glass supporter (6); Glass container (4) is placed on stainless steel electric boiling plate (1) top, is placed with corrosive medium, disc glass supporter, constant strain sample holder fixture and sample in glass container; Glass container (4), condensing reflux pipe (2) are realized and being tightly connected by reducing ground connection (3); Constant strain sample holder fixture (5) is same material with base, is placed on disc glass supporter (6) top.
2. large dimension specimen high temperature stress corrosion experimental device according to claim 1, is characterized in that: wherein glass container is cylindrical, and glass container upper end is communicated with condensing reflux pipe lower end by reducing ground glass joint.
3. large dimension specimen high temperature stress corrosion experimental device according to claim 1, is characterized in that: constant strain sample accommodates clamp base has level to extending support plate, and fixture can be steadily firmly sitting on glass supporter.
4. large dimension specimen high temperature stress corrosion experimental device according to claim 1, is characterized in that: constant strain sample holder fixture can clamp 3 and above sample simultaneously, specimen size is 130 × 15 × 3mm.
5. large dimension specimen high temperature stress corrosion experimental device according to claim 1, is characterized in that: experimental provision can be high temperature resistant with glass container, and heatproof is greater than 1000 DEG C.
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| CN201410174129.4A CN103983507A (en) | 2014-04-28 | 2014-04-28 | A test device of high temperature stress corrosion of a large-size specimen |
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| CN201410174129.4A CN103983507A (en) | 2014-04-28 | 2014-04-28 | A test device of high temperature stress corrosion of a large-size specimen |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614255A (en) * | 2015-01-26 | 2015-05-13 | 中国科学院金属研究所 | High-temperature axial loading stress corrosion test device |
| CN106404577A (en) * | 2016-08-25 | 2017-02-15 | 江苏大学 | High temperature radial loading stress corrosion sample device |
| CN113797579A (en) * | 2021-08-17 | 2021-12-17 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Instrument for stainless steel nitric acid method intergranular corrosion test and use method |
| CN114486709A (en) * | 2022-03-15 | 2022-05-13 | 中国核动力研究设计院 | Three-phase corrosion test device and test method |
| CN115112551A (en) * | 2022-06-24 | 2022-09-27 | 中国核动力研究设计院 | Acid corrosion resistant dissolution kinetic reaction device and experimental method thereof |
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| JPH0296637A (en) * | 1988-10-03 | 1990-04-09 | Babcock Hitachi Kk | System for monitoring stress corrosion cracking generating life |
| CN2914069Y (en) * | 2006-06-28 | 2007-06-20 | 航天科工防御技术研究试验中心 | Tester of intercrystalline corrosion |
| CN201555795U (en) * | 2009-11-03 | 2010-08-18 | 中国船舶重工集团公司第七二五研究所 | Device applied to high-temperature stress corrosion test of large-size sample |
| CN203241330U (en) * | 2013-04-07 | 2013-10-16 | 中国石油天然气集团公司 | Magnesium chloride stress corrosion testing device |
| CN203824829U (en) * | 2014-04-28 | 2014-09-10 | 北京科技大学 | High-temperature stress corrosion test device for large-size samples |
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2014
- 2014-04-28 CN CN201410174129.4A patent/CN103983507A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0296637A (en) * | 1988-10-03 | 1990-04-09 | Babcock Hitachi Kk | System for monitoring stress corrosion cracking generating life |
| CN2914069Y (en) * | 2006-06-28 | 2007-06-20 | 航天科工防御技术研究试验中心 | Tester of intercrystalline corrosion |
| CN201555795U (en) * | 2009-11-03 | 2010-08-18 | 中国船舶重工集团公司第七二五研究所 | Device applied to high-temperature stress corrosion test of large-size sample |
| CN203241330U (en) * | 2013-04-07 | 2013-10-16 | 中国石油天然气集团公司 | Magnesium chloride stress corrosion testing device |
| CN203824829U (en) * | 2014-04-28 | 2014-09-10 | 北京科技大学 | High-temperature stress corrosion test device for large-size samples |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614255A (en) * | 2015-01-26 | 2015-05-13 | 中国科学院金属研究所 | High-temperature axial loading stress corrosion test device |
| CN104614255B (en) * | 2015-01-26 | 2017-11-03 | 中国科学院金属研究所 | A kind of axially loaded stress corrosion testing device of high temperature |
| CN106404577A (en) * | 2016-08-25 | 2017-02-15 | 江苏大学 | High temperature radial loading stress corrosion sample device |
| CN113797579A (en) * | 2021-08-17 | 2021-12-17 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Instrument for stainless steel nitric acid method intergranular corrosion test and use method |
| CN114486709A (en) * | 2022-03-15 | 2022-05-13 | 中国核动力研究设计院 | Three-phase corrosion test device and test method |
| CN115112551A (en) * | 2022-06-24 | 2022-09-27 | 中国核动力研究设计院 | Acid corrosion resistant dissolution kinetic reaction device and experimental method thereof |
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