CN104330312A - Detection testing device for hydrogen embrittlement resistance of materials - Google Patents
Detection testing device for hydrogen embrittlement resistance of materials Download PDFInfo
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- CN104330312A CN104330312A CN201410667300.5A CN201410667300A CN104330312A CN 104330312 A CN104330312 A CN 104330312A CN 201410667300 A CN201410667300 A CN 201410667300A CN 104330312 A CN104330312 A CN 104330312A
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- hydrogen embrittlement
- pressurization system
- pressure
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- performance detection
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Abstract
The invention relates to a detection testing device for the hydrogen embrittlement resistance of materials. The detection testing device comprises a sample clamping device which is connected with a vacuumizing system and a gas pressurization system, respectively, wherein the gas pressurization system is connected with an air compressor; a pressure sensor is mounted on a pipeline of the gas pressurization system and is connected with a data collector. According to the detection testing device, a processed sample is put on the sample clamping device and is fastened by virtue of bolts; the vacuumizing system is utilized for vacuumizing a gas storage chamber at the bottom of the sample, and the whole pipeline, the pressure sensor and a second chronograph are utilized for controlling the pressure rise velocity to be as smooth as possible, and the data collector is utilized for recording the transient pressure when the sample explodes and the consumed time. The detection testing device has the characteristics of simple structure, stable experimental testing result and low detection difficulty.
Description
Technical field
The present invention relates to a kind of test unit, be specifically related to a kind of material anti-hydrogen embrittlement performance detection tester, for the test that metal material anti-hydrogen embrittlement detects.
Background technology
Hydrogen embrittlement is the hydrogen be dissolved in steel, is polymerized to hydrogen molecule, causes stress to concentrate, and exceedes the strength degree of steel, forms tiny crackle in steel inside.Under the effect at internal residual stress of manufacture and the Microamounts of Hydrogen entering steel inside in assembling process (electroplate, weld) of material metallurgical process and part, cause material embrittlement even to ftracture.Hydrogen embrittlement is prevented only, uncurable disease, and hydrogen embrittlement, once generation, just cannot be eliminated.Therefore, all need to detect its anti-hydrogen embrittlement performance with the pressure vessel etc. of hydrogen atoms contact.
At present, hydrogen embrittlement test method has sustained load test method(s) and can diffusible hydrogen determination method.Sustained load hydrogen embrittlement test method comprises " notch tension test " and " stress loop test " that specify in ASTM F519, specifies " test of securing member slant cleats ", slow strain rate test etc. in ASTM B839; Diffusible hydrogen determination method can comprise non-electrochemical method of testing and electro-chemical test method etc.
Now two quasi-representative hydrogen embrittlement method of testings are described below.
1. sustained load hydrogen embrittlement test method
In ASTM F519 to the HB5067 hydrogen embrittlement sample adopted in hydrogen embrittlement test method as shown in Figure 1.
As can be seen from Figure 1 sustained load hydrogen embrittlement test is extremely high to the processing request of sample, and Notch angle controls at 60 ° ± 1 °, breach surface roughness requirements Ra0.8, and also very strict to indentation, there diametric requirements.
So the processing of sample will be crucial, if sample processing goes wrong, will directly cause the inefficacy of test findings.
2. double-electrolyzer test
Can belong to electrochemical method by diffusible hydrogen assay method, electrolytic cell used as shown in Figure 2.
As seen from Figure 2, the double-electrolyzer apparatus structure measuring hydrogen richness is complicated, add difficulty like this, being not easy to operation for surveying hydrogen richness measurement.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the object of this invention is to provide a kind of material anti-hydrogen embrittlement performance detection tester, having the advantages that experimental provision structure is simple, laboratory test results is stablized, detection difficulty is low.
For achieving the above object, the technical solution used in the present invention is: a kind of material anti-hydrogen embrittlement performance detection tester, includes sample holding device 1, sample holding device 1 respectively with pumped vacuum systems 2 and gas pressurization system 3; Gas pressurization system 3 is connected with air compressor machine 4; The pipeline of gas pressurization system 3 is provided with pressure transducer 5; Pressure transducer 5 is connected with data acquisition unit 6.
Described sample holding device includes upper flange and lower flange; Upper flange and lower flange adopt 8 high-strength bolts to be connected; Lower flange is provided with high pressure O type circle; Style is located on high pressure O type circle; Style top is high strength steel packing ring; The side of lower flange be provided be connected with pumped vacuum systems vacuumize hole; Air intake opening is provided with bottom lower flange; Upper flange top is provided with vent port.Described sample holding device place adopts 8 high-strength bolts to clamp sample,
Air storage chamber bottom described sample holding device and whole gas circuit are connected with pumped vacuum systems 2.
Described gas pressurization system adopts 100:1 gas boosting pump, and its power resources are the pressurized air of 0.4 ~ 0.8MPa of air compressor machine, and specified maximum output pressure 80MPa, output pressure is accurate stepless adjustable.
Described gas pressurization system 3 is provided with manual pressure regulating valve.
Described gas pressurization system is provided with electric contact type pressure gauge and solenoid valve.
The invention has the beneficial effects as follows:
This test unit subjects is sheet disc sample, and sample holding device place adopts 8 high-strength bolts to clamp sample, and sample picks and places conveniently; Coordinated accurately can be controlled rate of pressure rise by pressure transducer and stopwatch, data acquisition unit can gather moment burst pressure, accomplishes accurate recording, guarantees the accuracy of hydrogen embrittlement test data.
This patent, according to content " selecting the metal material test method of the resistance to hydrogen embrittlement " requirement of BS EN ISO 11114-4-2005 Part IV, have developed and can meet standard-required and the material anti-hydrogen embrittlement performance test apparatus being easy to operation.Solve existing material anti-hydrogen embrittlement Performance Detection, sustained load hydrogen embrittlement sample difficulty of processing is comparatively large, and coupon results is unstable, and electrochemical measurement hydrogen richness device is comparatively complicated again, measures the technical matters that difficulty is large.
Accompanying drawing explanation
Fig. 1 is prior art sustained load hydrogen embrittlement test sample.
Fig. 2 is prior art double-electrolyzer schematic diagram.
Fig. 3 is structure principle chart of the present invention.
Fig. 4 is the structural representation of sample holding device of the present invention.
Embodiment
Below in conjunction with accompanying drawing, structural principle of the present invention and principle of work are described in further detail.
See Fig. 1, a kind of material anti-hydrogen embrittlement performance detection tester, includes sample holding device 1, is connected with pumped vacuum systems 2 and gas pressurization system 3 bottom sample holding device 1; Gas pressurization system 3 is connected with air compressor machine 4; The pipeline of gas pressurization system 3 is provided with pressure transducer 5; Pressure transducer 5 is connected with data acquisition unit 6.
See Fig. 4, described sample holding device includes upper flange 9 and lower flange 14; Upper flange 9 and lower flange 14 adopt 8 high-strength bolts 10 to be connected; Lower flange 14 is provided with high pressure O type circle 13; Style 12 is located on high pressure O type circle 13; Style 12 top is high strength steel packing ring 11; The side of lower flange 14 be provided be connected with pumped vacuum systems 2 vacuumize hole 7; Air intake opening 15 is provided with bottom lower flange 14; Upper flange 9 top is provided with vent port 8.Described sample holding device place adopts 8 high-strength bolts to clamp sample.
Before described test, air storage chamber bottom sample holding device and whole gas circuit are vacuumized, complete after vacuumizing, close vacuum pump and connect valve.
Described gas pressurization system adopts 100:1 gas boosting pump, and its power resources are the pressurized air of 0.4 ~ 0.8MPa of air compressor machine, and specified maximum output pressure 80MPa, output pressure is accurate stepless adjustable.Gas pressurization system is furnished with manual pressure regulating valve, is got final product the pressure of the output high-pressure side of electrodeless adjustment supercharge pump by the driving pressure adjusting supercharge pump, for raising the efficiency, uses electric contact type pressure gauge and solenoid control output pressure.
Comparatively stable rate of pressure rise can be realized by pressure transducer and stopwatch, by data acquisition unit, gather final burst pressure.
The concrete steps of cylinder material anti-hydrogen embrittlement performance test of the present invention are as follows:
1) be 58 ± 0.5mm by the diameter processed, thickness is that the sample of 0.75 ± 0.005mm is positioned over sample holding device place, and by bolted;
2) by pumped vacuum systems, air storage chamber bottom sample and whole pipeline are carried out vacuumizing process, the air of whole pipeline is gone out completely, avoid the oxygen in air on the impact of test findings;
3) after on-test, use pressure transducer and stopwatch to control rate of pressure rise, ensure that rate of pressure rise is steady as far as possible, by data acquisition unit record sample explosion instantaneous pressure, and write down elapsed time;
4), after completing 6 groups of helium tests and 9 groups of hydrogen gas tests, complete evaluation is carried out to the anti-hydrogen embrittlement performance of material.
Claims (6)
1. a material anti-hydrogen embrittlement performance detection tester, includes sample holding device (1), it is characterized in that, sample holding device (1) respectively with pumped vacuum systems (2) and gas pressurization system (3); Gas pressurization system (3) is connected with air compressor machine (4); The pipeline of gas pressurization system (3) is provided with pressure transducer (5); Pressure transducer (5) is connected with data acquisition unit (6).
2. a kind of material anti-hydrogen embrittlement performance detection tester according to claim 1, is characterized in that, described sample holding device includes upper flange (9) and lower flange (14); Upper flange (9) and lower flange (14) adopt 8 high-strength bolts (10) to be connected; Lower flange (14) is provided with high pressure O type circle (13); Style (12) is located in high pressure O type circle (13); Style (12) top is high strength steel packing ring (11); The side of lower flange (14) be provided be connected with pumped vacuum systems (2) vacuumize hole (7); Lower flange (14) bottom is provided with air intake opening (15); Upper flange (9) top is provided with vent port (8).
3. a kind of material anti-hydrogen embrittlement performance detection tester according to claim 1, is characterized in that, the air storage chamber bottom described sample holding device and whole gas circuit are connected with pumped vacuum systems (2).
4. a kind of material anti-hydrogen embrittlement performance detection tester according to claim 1, it is characterized in that, described gas pressurization system adopts 100:1 gas boosting pump, its power resources are the pressurized air of 0.4 ~ 0.8MPa of air compressor machine, specified maximum output pressure 80MPa, output pressure is accurate stepless adjustable.
5. a kind of material anti-hydrogen embrittlement performance detection tester according to claim 1, is characterized in that, described gas pressurization system (3) is provided with manual pressure regulating valve.
6. a kind of material anti-hydrogen embrittlement performance detection tester according to claim 1, it is characterized in that, described gas pressurization system is provided with electric contact type pressure gauge and solenoid valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410667300.5A CN104330312A (en) | 2014-11-20 | 2014-11-20 | Detection testing device for hydrogen embrittlement resistance of materials |
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| CN201410667300.5A CN104330312A (en) | 2014-11-20 | 2014-11-20 | Detection testing device for hydrogen embrittlement resistance of materials |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104897744A (en) * | 2015-04-23 | 2015-09-09 | 中国石油大学(华东) | Metal hydrogen permeation behavior research device and method |
| CN104897472A (en) * | 2015-06-19 | 2015-09-09 | 浙江大学 | Multifunctional differential pressure tester for compatibility of high pressure hydrogen with material |
| CN106855483A (en) * | 2016-12-23 | 2017-06-16 | 中国矿业大学 | Hydrogen Vapor Pressure fatigue rupture and hydrogen-induced delayed failure sensitivity test equipment and method |
| CN111380659A (en) * | 2020-03-20 | 2020-07-07 | 中国北方车辆研究所 | Airtightness testing device and method for power battery water cooling system |
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| CN204128907U (en) * | 2014-11-20 | 2015-01-28 | 西安摩尔石油工程实验室有限公司 | A kind of material anti-hydrogen embrittlement performance detection tester |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104897744A (en) * | 2015-04-23 | 2015-09-09 | 中国石油大学(华东) | Metal hydrogen permeation behavior research device and method |
| CN104897472A (en) * | 2015-06-19 | 2015-09-09 | 浙江大学 | Multifunctional differential pressure tester for compatibility of high pressure hydrogen with material |
| CN104897472B (en) * | 2015-06-19 | 2017-11-24 | 浙江大学 | The experimental rig of multi-functional pressure differential High Pressure Hydrogen and material compatibility |
| CN106855483A (en) * | 2016-12-23 | 2017-06-16 | 中国矿业大学 | Hydrogen Vapor Pressure fatigue rupture and hydrogen-induced delayed failure sensitivity test equipment and method |
| CN106855483B (en) * | 2016-12-23 | 2020-02-14 | 中国矿业大学 | Hydrogen pressure fatigue fracture and hydrogen induced hysteresis fracture sensitivity test device and method |
| CN111380659A (en) * | 2020-03-20 | 2020-07-07 | 中国北方车辆研究所 | Airtightness testing device and method for power battery water cooling system |
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Address after: High tech Zone Zhang Bayi Road 710065 in Shaanxi Province, Xi'an City Huixin IBC-B block 13 layer Applicant after: XI'AN MAURER PETROLEUM ENGINEERING LABORATORY CO., LTD. Address before: High tech Zone Zhang Bayi Road 710065 in Shaanxi Province, Xi'an City Huixin IBC-B block 13 layer Applicant before: Xi'an Maurer Petroleum Engineering Laboratory Co.,Ltd. |
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Application publication date: 20150204 |
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