CN202599726U - Test sample for testing welding joint high-temperature strength and notch sensitivity - Google Patents
Test sample for testing welding joint high-temperature strength and notch sensitivity Download PDFInfo
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- CN202599726U CN202599726U CN 201220196643 CN201220196643U CN202599726U CN 202599726 U CN202599726 U CN 202599726U CN 201220196643 CN201220196643 CN 201220196643 CN 201220196643 U CN201220196643 U CN 201220196643U CN 202599726 U CN202599726 U CN 202599726U
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- 238000012360 testing method Methods 0.000 title claims abstract description 77
- 230000035945 sensitivity Effects 0.000 title claims abstract description 19
- 238000003466 welding Methods 0.000 title abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 29
- 238000007373 indentation Methods 0.000 claims description 7
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000009864 tensile test Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 230000007704 transition Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 230000002045 lasting effect Effects 0.000 description 5
- 238000010998 test method Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The utility model relates to a test sample for testing welding joint high-temperature strength and notch sensitivity, which belongs to the technical field of material sciences. The test sample comprises a stripe-shaped test sample, wherein two ends of the test sample are thick and serve as clamping and supporting ends, and the middle of the test sample is thin and serves as a testing section; inwardly recessed smooth transition sections are arranged at the clamping and the supporting ends at the two ends of the test sample toward the testing section in the middle; and a notch is formed at the testing section. According to the utility model, as the variable cross-section notch is added on the test sample, the test sample breaks in welding joint metal and the welding joint metal strength and the notch sensitivity thereof can be tested; the problem that a traditional test sample can not test the welding joint strength and the notch sensitivity is solved; the processing of the test sample is simple, the testing process is basically the same as a conventional tensile test method; and the test sample fills the technological gap in the field, and has larger social and economic benefits.
Description
Technical field
The utility model relates to a kind of weld seam elevated temperature strength and notch sensitivity test sample thereof, belongs to materials science field.
Background technology
Along with China's development of electric power industry; Many high parameter high capacity fired power generating unit put into operation in succession; Power station high temperature and high pressure steam pipeline extensively adopts high-alloy steel; Like P91, P92 or the like, be the problem that domestic and international design, manufacturing, operation, maintenance, supervision and inspection personnel are extremely paid close attention to intensity, security, reliability and the serviceable life of these high-alloy steel jet chimney weld seams always.Along with the high temperature long-time running, the safety issue of weld metal becomes increasingly conspicuous.Show that mainly along with the high temperature long-play, the decline of its elevated temperature strength and weld metal are to the sensitive question of breach.Performance variation law under research and grasp weld metal act on when high temperature is long has important theory to the safe operation that guarantees the high-temperature metal parts and is worth and practical significance.
For obtaining to move the back performance variation law when weld metal high temperature is long, Erichsen test when needing the butt welded seam metal to carry out high temperature length.The present prior standard method of inspection, sample mainly contains circular specimen, template sample and homogeneous tube tensile sample, and the test section sectional area is invariable usually.As shown in Figure 1, Fig. 1 is conventional tabular lasting tensile sample object construction synoptic diagram.
Should comprise weld seam, heat-affected zone and mother metal for the weld seam test section; Because weld metal intensity is far above mother metal and heat-affected zone; Especially P91 steel weld seam; Conventional tensile sample generally all breaks at weld heat-affected zone, and the strength of welded joint that records is actually weld heat-affected zone intensity, and the weld metal actual performance is difficult to record.Power station its safe operation of high temperature and high pressure steam pipe welding seam performance impact for research weld metal performance, needs the butt welded seam metal to carry out Performance Detection usually; Conventional stretching; Comprise test methods such as normal temperature stretching, drawing by high temperature and creep rupture strength, the test section cross-sectional area is generally invariable, because weld strength is far above mother metal and heat-affected zone; Sample is big multibreak in the heat-affected zone, and the lateral performance of weld metal has no way of learning.
Summary of the invention
In order to solve technical matters of the prior art; The utility model provides a kind of weld seam elevated temperature strength and notch sensitivity test sample thereof; Its objective is in order to provide a kind of method of testing to guarantee that tensile sample breaks at welded seam area, thereby record the notch sensitivity of weld metal intensity and weld metal.
The utility model is realized through following technical scheme:
Weld seam elevated temperature strength and notch sensitivity test sample thereof comprise that two ends are thick, middle thin elongate in shape sample, and two ends are bare terminal end, the centre is a test section.The bare terminal end at said sample two ends is provided with inwardly recessed rounding off section to middle test section direction, and test section is provided with breach.
Described breach is opened the side at test section.
Described breach is opened on weld metal.
Described breach is located at the centre position of test section.
Described is rectangular configuration by test agent, and the test width of bare terminal end is 24mm, and monolateral length is 20mm, and center test section length is 35-45mm, and thickness is 3mm, the dark 2mm of test section central indentation, and wide 2mm, length equals by the sample thickness of having a try.
Advantage and effect:
The utility model is a kind of weld seam elevated temperature strength and notch sensitivity test sample thereof; Owing on sample, added a kind of variable cross section band notched specimen; Breach is opened in the weld metal part; It can guarantee that sample breaks in weld metal, and can record weld metal intensity and to the susceptibility of breach.Because there are defectives such as lack of penetration unavoidably in the root of weld, weld metal intensity and foundation is provided to the security that the measurement of the susceptibility of breach can be the long-time running under HTHP of assessment weld seam.Solved traditional sample and can't measure problems such as weld strength and weld seam notch sensitivity, this sample processing is simple, and process of the test is the same basically with conventional stretching test method.This utility model has been filled up the blank of this technical field, has bigger social benefit and economic benefit.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation.
Fig. 1 is conventional tabular lasting tensile sample object construction synoptic diagram;
The lasting tensile sample object construction of the band breach synoptic diagram that Fig. 2 the utility model is done;
The test unit schematic diagram that Fig. 3 the utility model adopts;
Tensile test piece indentation, there proof stress was a 350MPa object construction synoptic diagram when high temperature that Fig. 4 the utility model is done was long;
Tensile test piece indentation, there proof stress was a 290MPa object construction synoptic diagram when high temperature that Fig. 5 the utility model is done was long;
Tensile test piece indentation, there proof stress was a 250MPa object construction synoptic diagram when high temperature that Fig. 6 the utility model is done was long.
Among the figure: test section 1, bare terminal end 2, breach 3, levelling device 4, leverage 5, charger 6, temperature survey and temperature control 7, sample chuck 8, sample 9, high-temperature heater 10.
Embodiment
Embodiment 1:
The utility model is weld seam elevated temperature strength and notch sensitivity test sample thereof, and is as shown in Figure 2, and the said sample 9 of the utility model is that strip is identical with conventional lasting sample, and two ends are thick, middle thin structure; Two ends are bare terminal end 2, and the centre is a test section 1, and the bare terminal end 2 at two ends is inside recessed rounding off section to middle test section 1 direction, and the middle part of test section 1 wherein is provided with breach 3.
The band notched specimen Weld Performance test sample of the utility model, stretching test method was identical when its test operation step was long with conventional high temperature, and difference is sample production; As shown in Figure 2, the sample of the utility model is rectangular template, and two ends are that gripping section is identical with conventional lasting sample; The centre is a test section; Be provided with the rounding off section between two sections, test section wherein is notched rectangular shape, and breach is opened on weld metal.
The described sample of the utility model is the rectangle sheet, and bare terminal end test width is 24mm, and monolateral length is 20mm, and center test section length is 35-45mm, and thickness is 3mm, the dark 2mm of central indentation, and wide 2mm, notch length equals sample thickness.
As shown in Figure 3; Utilize the utility model sample do experiment on conventional high temperature tension test machine, to accomplish; Through the rupture time under the different stress of same temperature such as weld seam band notched specimen, mother metal band notched specimen, measure Weld Performance and weld seam notch sensitivity.During test; Sample 9 is clipped on the sample chuck 8 in the high-temperature heater 10; The heating furnace two ends seal with insulation material, and adjustment levelling device 4 makes sample transfer to the middle part of heating furnace 10, and energized heats up; Through temperature survey and temperature control 7 test temperature is risen to 540 ℃ of test temperatures, and keep constant temperature.After temperature reaches test temperature, load through leverage 5 and charger 6, adjust levelling device 4 again after loading is accomplished and make sample remain on the middle part of heating furnace 10.Under 540 ℃, do tension test when long, break, calculate rupture time, draw the corresponding relation of stress and rupture time until sample.
Embodiment 2:
Adopt square-section P91 button, test section sample sectional dimension is 7 * 3mm, and breach is opened in welded joints, the dark 2mm of opening, the wide 2mm of opening.Test temperature is 540 ℃, and 4 sample break place proof stresses are respectively 364MPa, 350MPa, 290MPa, 250MPa, and the sample fracture time is respectively 0,20,1582,9600 hour, and is extremely shown in Figure 6 like Fig. 4.
Adopt square-section P91 base metal test specimen, test section sample sectional dimension is 7 * 3mm, and breach is opened at test section middle part, the dark 2mm of opening, the wide 2mm of opening.Test temperature is 540 ℃, and 2 sample break place proof stresses are respectively 350MPa, 250MPa, and the sample fracture time is respectively 10,4220 hours.
Relatively more visible; Proof stress is that P91 button its rupture time under 540 ℃ of 350MPa and 250MPa is more than 2 times of P91 base metal test specimen; It is thus clear that under 540 ℃, the indentation, there weld strength is higher than mother metal, at high temperature (540 ℃) weld seam notch sensitivity is lower than mother metal.Stretch test result when test findings sees table 1:P91 weld seam and mother metal v-notch sample high temperature (540 ℃) length for details.
Claims (5)
1. weld seam elevated temperature strength and notch sensitivity test sample thereof; Comprise that two ends are thick; Middle thin elongate in shape sample, two ends are bare terminal end (2), the centre is test section (1); It is characterized in that: the bare terminal end at two ends (2) is provided with inwardly recessed rounding off section to middle test section (1) direction, and test section (1) is provided with breach (3).
2. weld seam elevated temperature strength according to claim 1 and notch sensitivity test sample thereof is characterized in that: described breach (3) is opened the side at test section (1).
3. weld seam elevated temperature strength according to claim 1 and notch sensitivity test sample thereof is characterized in that: described breach (3) is opened on weld metal.
4. weld seam elevated temperature strength according to claim 1 and notch sensitivity test sample thereof, its spy is: described breach (3) is located at the centre position of test section (1).
5. weld seam elevated temperature strength according to claim 1 and notch sensitivity test sample thereof is characterized in that: described sample is a rectangular configuration, and the test width of bare terminal end (2) is 24mm; Monolateral length is 20mm; Center test section (1) length is 35-45mm, and thickness is 3mm, the dark 2mm of test section (1) central indentation (3); Wide 2mm, length equals by the sample thickness of having a try.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220196643 CN202599726U (en) | 2012-05-04 | 2012-05-04 | Test sample for testing welding joint high-temperature strength and notch sensitivity |
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| CN 201220196643 CN202599726U (en) | 2012-05-04 | 2012-05-04 | Test sample for testing welding joint high-temperature strength and notch sensitivity |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636385A (en) * | 2012-05-04 | 2012-08-15 | 东北电力科学研究院有限公司 | Test specimen for high-temperature strength and notch sensitivity of welding seam |
| CN103499494A (en) * | 2013-10-15 | 2014-01-08 | 北京星航机电装备有限公司 | Brazing metal honeycomb structure plane inner stretching performance testing method |
| CN106248714A (en) * | 2016-07-25 | 2016-12-21 | 太原理工大学 | A kind of infrared detection method for concrete high-temperature damage |
| CN112326551A (en) * | 2020-11-13 | 2021-02-05 | 江苏省沙钢钢铁研究院有限公司 | Method for testing performance of composite steel plate |
-
2012
- 2012-05-04 CN CN 201220196643 patent/CN202599726U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636385A (en) * | 2012-05-04 | 2012-08-15 | 东北电力科学研究院有限公司 | Test specimen for high-temperature strength and notch sensitivity of welding seam |
| CN103499494A (en) * | 2013-10-15 | 2014-01-08 | 北京星航机电装备有限公司 | Brazing metal honeycomb structure plane inner stretching performance testing method |
| CN106248714A (en) * | 2016-07-25 | 2016-12-21 | 太原理工大学 | A kind of infrared detection method for concrete high-temperature damage |
| CN112326551A (en) * | 2020-11-13 | 2021-02-05 | 江苏省沙钢钢铁研究院有限公司 | Method for testing performance of composite steel plate |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |