CN105643131A - Device for testing cold cracking tendency of welding joint on basis of adjustable rigid restraint and apparition of device - Google Patents
Device for testing cold cracking tendency of welding joint on basis of adjustable rigid restraint and apparition of device Download PDFInfo
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- CN105643131A CN105643131A CN201610120701.8A CN201610120701A CN105643131A CN 105643131 A CN105643131 A CN 105643131A CN 201610120701 A CN201610120701 A CN 201610120701A CN 105643131 A CN105643131 A CN 105643131A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
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Abstract
The invention discloses a device for testing cold cracking tendency of a welding joint on the basis of adjustable rigid restraint and an apparition of the device. The device is characterized in that a first support plate and a second support plate are arranged on a base, and guide columns are connected between the first support plate and the second support plate; sliders are arranged on the guide columns, a movable clamp is arranged on the sliders, an oil cylinder is arranged on the base and connected with the sliders, a load sensor is arranged on the second support plate, a fixed clamp is fixedly connected with the second support plate and is opposite to the movable clamp, and each of a first displacement sensor and a second displacement sensor is connected with two samples; the load sensor, the first displacement sensor and the second displacement sensor are collected with a data acquisition card respectively, and the data acquisition card is connected with a controller which is connected with the oil cylinder. External restraint conditions of the welding joint are simulated by the device, and the welding samples keep fixed restraint length in a test process for rigid restraint cracking test, so that the critical restraint stress of steel during cold cracking can be obtained.
Description
Technical field
The invention belongs to welding technology field, more specifically, relate to the welding point cold cracking based on adjustable rigid is restrained and incline/hot cracking tendency assay device, particularly relate to a kind of restrain based on adjustable rigid, for welding point cold cracking/hot cracking tendency assay device.
Background technology
Crackle is modal defect in welding point, and in many heavy construction structures, Joint Cracking is to be caused by welding cold cracking or fire check. For offshore engineering structure, the cold cracking that also happens occasionally in the welding point such as guide pipe on offshore platform, spud leg/fire check occurs, and causes huge economic loss. At present, a large amount of Novel high-strength steels are applied in offshore engineering structure, and in welding procedure, crack problem is more and more prominent, and the hysteresis quality of weld crack makes its hazardness be particularly acute. Therefore, how to determine the tearing tendency of steel quantitatively, be always up the difficult problem that Welder author faces. Purpose simple to operation for test, cost is low, China applies oblique Y groove lock test and implant test is more, and both approaches was all once formulated to China's national standard. But, both test methods can not simulate real constraint (restraint) degree during practical structures welding, this limitation causes that result of the test can not reflect the tearing tendency that steel are real, and the standard that therefore China tests about both is all revoked, at present the domestic new standard that formulation is not relevant.
It practice, have been proposed for considering the welding cold crack test method of actual constraint (restraint) degree in the world, the rigid restraint cracking test method that namely Holland scholar A.T.Fikkers proposed in 1974, is called for short RRC test. RRC test can simulate weldment produced contained counteracting force in cooling procedure, reflect the stress of welding point more truly, therefore, it is possible to determine the critical constraint stress or critical constraint (restraint) degree that tested steel crack quantitatively, it is used for judging the cold cracking inclination of actual welding joint. But this test method is simply possible to use in welding cold cracking test, and the adjustment of rigid restraint must flow through the size changing sample and solves.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, a kind of welding point crackle tendency assay device restrained based on adjustable rigid is provided, in welding point cooling procedure, based on the stress produced by autogenous shrinkage, condition is restrained in the outside that simulation welding point bears. In process of the test, welding piece keeps fixing contained length, just as welding point two ends are rigidly fixed the same, therefore becomes rigid restraint crackle (RRC) and tests. The core of this RRC test method is to obtain critical constraint stress �� during steel generation cold crack by RRC testcr, then compare with practical structures actual measurement or calculated constraint stress ��. If ��cr>=��, then do not crack; If ��cr�� ��, then crack.
The technical purpose of the present invention is achieved by following technical proposals:
Based on the welding point cold cracking inclination assay device that adjustable rigid is restrained, including base, movable clamp, stationary fixture, the first gripper shoe, oil cylinder, lead, the second gripper shoe, load transducer, slide block, the first displacement transducer and second displacement sensor, wherein:
Base arranges the first gripper shoe and the second gripper shoe, between the first gripper shoe and the second gripper shoe, is connected to horizontally disposed lead; Lead is provided with slide block, can move along lead, slide block arranges movable clamp, moves along lead along with slide block; Oil cylinder base arranges oil cylinder, and oil cylinder output shaft is connected with the middle position of slide block, so that can pass through output shaft and move on the direction of lead with movable slider; Second gripper shoe arranges load transducer, and stationary fixture and the second gripper shoe are fixedly linked, when oil cylinder is moved with movable slider by output shaft on the direction of lead, movable clamp produce relative to stationary fixture near or away from motion, compression or the load stretched is produced between sample, owing to stationary fixture and the second gripper shoe are fixedly linked, just gathered by load transducer; Stationary fixture and movable clamp are oppositely arranged, and both distances in the same size and with lead are consistent, so that the weld joint stable between the fixing respectively two pieces of samples of stationary fixture and movable clamp is in a plane being perpendicular to lead;
First displacement transducer is connected with two pieces of samples respectively by the first displacement sensor bracket, and the first displacement sensor bracket is across two samples and weld seam, so that the first displacement transducer can gather because weld seam welds the deformation of the two pieces of samples caused; Second displacement sensor is connected with two pieces of samples respectively by the second displacement sensor bracket, and the second displacement sensor bracket is across two samples and weld seam, so that second displacement sensor can gather because weld seam welds the deformation of the two pieces of samples caused;
Load transducer, the first displacement transducer is connected with data collecting card respectively with second displacement sensor, and data collecting card is connected with controller, and controller is connected with oil cylinder, to control the action of oil cylinder output shaft.
In technique scheme, controller is computer.
In technique scheme, oil cylinder is arranged on the outside of the first gripper shoe.
In technique scheme, servo oil pump is adopted to be connected with oil cylinder, the hydraulic oil that servo oil pump is got enters the flow seat of oil cylinder through smart oil filter, and the oil entering flow seat is used for system is applied test force (being driven slide block movement by output shaft) through servo valve on the one hand;Enter into accumulator on the other hand, in order to reduce the fluctuation of system oil pressure; The control system of servo oil pump is totally digitized control device, and this controller adopts PIDS control model.
Assembly of the invention application in rigid restraint cold crack test, when utilizing this assay device to test, displacement transducer selects Changchun Hao Yuan testing machine company limited to produce, control accuracy is 0.005mm, two pieces of samples are separately fixed on movable clamp and stationary fixture, choose different contained distances simultaneously, when a selected contained distance is tested, owing to the welding of commissure can produce to stretch or compression, two displacement transducers can gather signal respectively and pass through data collecting card, pass to controller, controller can judge that whether two pieces of samples are because welding produces displacement, if two pieces of samples are close to each other, then controller sends signal, so that oil cylinder output shaft moves to the direction away from stationary fixture with movable slider and movable clamp, so that it is zero that displacement transducer gathers deformation signal, the load data of load transducer collecting test process simultaneously, controller is passed to by data collecting card.
In technique scheme, sample according to test, select wlding that this sample job site under arms uses and welding procedure to test specimen welding (such as single track), in conjunction with the signal that displacement sensing provides, apply cut lotus and kept by contained distance principle of invariance, as ftractureed (by observing face crack rate, root crack rate and section crack rate judge, if three be 0 regard as ftracture), reduce again and restrain distance, until drawing cracking and indehiscent contained distance, i.e. critical contained distance, contained it is critical constraint stress (�� apart from corresponding binding force and constraint (restraint) degree with criticalcr), critical constraint (restraint) degree (Rcr) till.
Assembly of the invention application in HOT CRACK FOR WELDING P is tested, when utilizing this assay device to test, sample is welded, while welding, Welded Joints stretches, namely oil cylinder output shaft pulls slide block and movable clamp to move to the direction away from stationary fixture, so that weld metal is subject to force-extension in crystallisation by cooling process, until weld. Observing fracture subsequently, whether inspection weld metal has fire check feature. The test experiments of HOT CRACK FOR WELDING P, is controlled by rate of extension, it is not necessary to displacement transducer, namely adopts different stretch speed Welded Joints to stretch, it is judged that the impact of different stretch speed Welded Joints.
Compared with prior art, beneficial effects of the present invention is as follows: (1) uses the present invention can obtain steel contained performance of (rate of cooling, diffusible hydrogen content etc.) under welding material and welding condition, avoid the critical constraint stress that cracks or critical constraint (restraint) degree, to judge the cold cracking inclination of actual welding joint; (2) except welding cold cracking, the present invention also can carry out HOT CRACK FOR WELDING P test, make weld metal zone in welding cooling procedure that plastic deformation occur by changing rate of extension, thus increasing the probability that fire check occurs, evaluate the hot cracking tendency under mother metal, wlding and welding procedure combination condition by recording the maximum tension speed of weld metal opposing cold crack; (3) it is applicable not only to sheet material, is also applied for tubing and plate angle welding; (4) present invention has the scalable function of rigid restraint, all sample uniform sizes, changes rigid restraint level by adjusting displacement transducer.
Accompanying drawing explanation
Fig. 1 is the structural representation (1) of the present invention, and wherein 1 is base, and 2-1 is movable clamp, 2-2 is stationary fixture, 3 is the first gripper shoe, and 4 is oil cylinder, and 4-1 is oil cylinder output shaft, 5 is lead, 6 is the second gripper shoe, and 7 is load transducer, and 8 is slide block, 9 is the first displacement transducer, and 9-1 is the first displacement sensor bracket.
Fig. 2 is the structural representation (2) of the present invention, and wherein 2-1 is movable clamp, and 2-2 is stationary fixture, and 7 is load transducer, and 9 is the first displacement transducer, and 10 is second displacement sensor, and 11-1 is the first sample, and 11-2 is the second sample, and 12 is weld seam.
Fig. 3 is the signal connection diagram of the present invention, and wherein 4 is oil cylinder, and 7 is load transducer, and 9 is the first displacement transducer, and 10 is second displacement sensor, and 13 is data collecting card, and 14 is controller.
Fig. 4 is the divided edge structure schematic diagram used in the embodiment of the present invention, and a is 2 4mm, b be 300mm, c be 50mm, c/2 be 25mm, d is 60 ��, and e is 60 ��.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, technical solution of the present invention is described in further detail.
As shown in drawings, a kind of welding point cold cracking inclination assay device restrained based on adjustable rigid of the present invention, including base, movable clamp, stationary fixture, the first gripper shoe, oil cylinder, lead, second gripper shoe, load transducer, slide block, first displacement transducer and second displacement sensor, wherein:
Base arranges the first gripper shoe and the second gripper shoe, between the first gripper shoe and the second gripper shoe, is connected to horizontally disposed lead; Lead is provided with slide block, can move along lead, slide block arranges movable clamp, moves along lead along with slide block; Oil cylinder base arranges oil cylinder, and oil cylinder output shaft is connected with the middle position of slide block, so that can pass through output shaft and move on the direction of lead with movable slider; Second gripper shoe arranges load transducer, and stationary fixture and the second gripper shoe are fixedly linked, when oil cylinder is moved with movable slider by output shaft on the direction of lead, movable clamp produce relative to stationary fixture near or away from motion, compression or the load stretched is produced between sample, owing to stationary fixture and the second gripper shoe are fixedly linked, just gathered by load transducer; Stationary fixture and movable clamp are oppositely arranged, and both distances in the same size and with lead are consistent, so that the weld joint stable between the fixing respectively two pieces of samples of stationary fixture and movable clamp is in a plane being perpendicular to lead;
First displacement transducer is connected with two pieces of samples respectively by the first displacement sensor bracket, and the first displacement sensor bracket is across two samples and weld seam, so that the first displacement transducer can gather because weld seam welds the deformation of the two pieces of samples caused; Second displacement sensor is connected with two pieces of samples respectively by the second displacement sensor bracket, and the second displacement sensor bracket is across two samples and weld seam, so that second displacement sensor can gather because weld seam welds the deformation of the two pieces of samples caused;
Load transducer, the first displacement transducer is connected with data collecting card respectively with second displacement sensor, and data collecting card is connected with controller, and controller is connected with oil cylinder, to control the action of oil cylinder output shaft.
In technique scheme, controller is computer.
In technique scheme, oil cylinder is arranged on the outside of the first gripper shoe.
In technique scheme, servo oil pump is adopted to be connected with oil cylinder, the hydraulic oil that servo oil pump is got enters the flow seat of oil cylinder through smart oil filter, and the oil entering flow seat is used for system is applied test force (being driven slide block movement by output shaft) through servo valve on the one hand; Enter into accumulator on the other hand, in order to reduce the fluctuation of system oil pressure; The control system of servo oil pump is totally digitized control device, and this controller adopts PIDS control model.
Assembly of the invention application in rigid restraint cold crack test, when utilizing this assay device to test, displacement transducer selects Changchun Hao Yuan testing machine company limited to produce, control accuracy is 0.005mm, two pieces of samples are separately fixed on movable clamp and stationary fixture, choose different contained distances simultaneously, when a selected contained distance is tested, owing to the welding of commissure can produce to stretch or compression, two displacement transducers can gather signal respectively and pass through data collecting card, pass to controller, controller can judge that whether two pieces of samples are because welding produces displacement, if two pieces of samples are close to each other, then controller sends signal, so that oil cylinder output shaft moves to the direction away from stationary fixture with movable slider and movable clamp, so that it is zero that displacement transducer gathers deformation signal, the load data of load transducer collecting test process simultaneously, controller is passed to by data collecting card, otherwise two pieces of samples are located remotely from each other, then oil cylinder output shaft moves to the direction near stationary fixture with movable slider and movable clamp, so that it is zero that displacement transducer gathers deformation signal.
In technique scheme, the sample according to test, select wlding that this sample job site under arms uses and welding procedure to test specimen welding (such as single track), in conjunction with the signal that displacement sensing provides, apply a section lotus by restraining distance principle of invariance. (judge by observing face crack rate, root crack rate and section crack rate as ftractureed, if three be 0 regard as ftracture), reduce again and restrain distance, until drawing cracking and indehiscent contained distance, i.e. critical contained distance, contained is critical constraint stress (�� apart from corresponding binding force and constraint (restraint) degree with criticalcr), critical constraint (restraint) degree (Rcr) till.
In technique scheme, the displacement signal of two displacement transducer collections is carried out taking the mean by controller, judges further according to average.
In technique scheme, the first displacement transducer is connected with two pieces of samples respectively by the first displacement sensor bracket, and the first displacement sensor bracket is across two samples and weld seam, the first displacement transducer alignment weld seam middle position; And first displacement sensor bracket fixing point on two samples equal to the distance of weld seam central authorities.
In technique scheme, second displacement sensor is connected with two pieces of samples respectively by the second displacement sensor bracket, and the second displacement sensor bracket is across two samples and weld seam, second displacement sensor alignment weld seam middle position; And second displacement sensor bracket fixing point on two samples equal to the distance of weld seam central authorities.
In technique scheme, when carrying out cold crack test, generally keep cutting lotus at least 48h, it is preferable that 48 72h.
It is E36 steel plate that the cold cracking inclination assay device utilizing invention carries out high-strength steel cold cracking performance testing test material, and Plate Welding adopts carbon dioxide gas arc welding welding method, and selecting wlding is GFL-71NI wlding, and protective gas is pure carbon dioxide gas.Pilot seam is of a size of 80mm, divided edge structure form as shown in drawings, for X-type groove. Welding current 180-185A, voltage 20-23V, thermal weld stress is 1.05-1.10kJ/mm, the contained distance chosen respectively 1.5,1.6,1.65 and 1.7m, it is thus achieved that the contained distance under the welding procedure of material, wlding and correspondence is 1.7m, critical constraint stress is 666.7MPa, and critical constraint (restraint) degree is 6058.82MPa.
It is E36 steel plate that the cold cracking inclination assay device utilizing invention carries out high-strength steel cold cracking performance testing test material; Plate Welding adopts carbon dioxide gas arc welding welding method; selecting wlding is DW-A55L wlding, and protective gas is for mixing gas for 20% argon+80%CO2. The size of pilot seam and divided edge structure form are ibid. Welding current 180-185A, voltage 20-23V, thermal weld stress is 1.05-1.10kJ/mm, the contained distance chosen respectively 1.5,1.6,1.65 and 1.7m, it is thus achieved that the contained distance under the welding procedure of material, wlding and correspondence is 1.65m, critical constraint stress is 632.5MPa, and critical constraint (restraint) degree is 6242.42MPa.
Assembly of the invention application in HOT CRACK FOR WELDING P is tested, when utilizing this assay device to test, sample is welded, while welding, Welded Joints stretches, namely oil cylinder output shaft pulls slide block and movable clamp to move to the direction away from stationary fixture, so that weld metal is subject to force-extension in crystallisation by cooling process, until weld. Observing fracture subsequently, whether inspection weld metal has fire check feature. The test experiments of HOT CRACK FOR WELDING P, is controlled by rate of extension, it is not necessary to displacement transducer, namely adopts different stretch speed Welded Joints to stretch, it is judged that the impact of different stretch speed Welded Joints.
Above the present invention has been done exemplary description; should be noted that; when without departing from the core of the present invention, any simple deformation, amendment or other those skilled in the art can not spend the equivalent replacement of creative work to each fall within protection scope of the present invention.
Claims (8)
1. the welding point cold cracking inclination assay device restrained based on adjustable rigid, it is characterised in that include base, movable clamp, stationary fixture, first gripper shoe, oil cylinder, lead, the second gripper shoe, load transducer, slide block, the first displacement transducer and second displacement sensor, wherein:
Base arranges the first gripper shoe and the second gripper shoe, between the first gripper shoe and the second gripper shoe, is connected to horizontally disposed lead; Lead is provided with slide block, can move along lead, slide block arranges movable clamp, moves along lead along with slide block; Oil cylinder base arranges oil cylinder, and oil cylinder output shaft is connected with the middle position of slide block, so that can pass through output shaft and move on the direction of lead with movable slider; Second gripper shoe arranges load transducer, and stationary fixture and the second gripper shoe are fixedly linked, when oil cylinder is moved with movable slider by output shaft on the direction of lead, movable clamp produce relative to stationary fixture near or away from motion, compression or the load stretched is produced between sample, owing to stationary fixture and the second gripper shoe are fixedly linked, just gathered by load transducer; Stationary fixture and movable clamp are oppositely arranged, and both distances in the same size and with lead are consistent, so that the weld joint stable between the fixing respectively two pieces of samples of stationary fixture and movable clamp is in a plane being perpendicular to lead;
First displacement transducer is connected with two pieces of samples respectively by the first displacement sensor bracket, and the first displacement sensor bracket is across two samples and weld seam, so that the first displacement transducer can gather because weld seam welds the deformation of the two pieces of samples caused;Second displacement sensor is connected with two pieces of samples respectively by the second displacement sensor bracket, and the second displacement sensor bracket is across two samples and weld seam, so that second displacement sensor can gather because weld seam welds the deformation of the two pieces of samples caused;
Load transducer, the first displacement transducer is connected with data collecting card respectively with second displacement sensor, and data collecting card is connected with controller, and controller is connected with oil cylinder, to control the action of oil cylinder output shaft.
2. the welding point cold cracking inclination assay device restrained based on adjustable rigid according to claim 1, it is characterized in that, servo oil pump is adopted to be connected with oil cylinder, the hydraulic oil that servo oil pump is got enters the flow seat of oil cylinder through smart oil filter, and the oil entering flow seat is used for system is applied test force through servo valve on the one hand; Enter into accumulator on the other hand, in order to reduce the fluctuation of system oil pressure; The control system of servo oil pump is totally digitized control device, and this controller adopts PIDS control model.
3. the welding point cold cracking inclination assay device restrained based on adjustable rigid according to claim 1, it is characterised in that controller is computer.
4. the welding point cold cracking inclination assay device restrained based on adjustable rigid according to claim 1, it is characterised in that oil cylinder is arranged on the outside of the first gripper shoe.
5. the welding point cold cracking inclination assay device restrained based on adjustable rigid according to claim 1, it is characterized in that, first displacement transducer is connected with two pieces of samples respectively by the first displacement sensor bracket, and first displacement sensor bracket across two samples and weld seam, the first displacement transducer alignment weld seam middle position; And first displacement sensor bracket fixing point on two samples equal to the distance of weld seam central authorities.
6. the welding point cold cracking inclination assay device restrained based on adjustable rigid according to claim 1, it is characterized in that, second displacement sensor is connected with two pieces of samples respectively by the second displacement sensor bracket, and second displacement sensor bracket across two samples and weld seam, second displacement sensor alignment weld seam middle position; And second displacement sensor bracket fixing point on two samples equal to the distance of weld seam central authorities.
7. the welding point cold cracking inclination assay device contained based on adjustable rigid as claimed in claim 1 application in rigid restraint cold crack test.
8. the welding point cold cracking inclination assay device contained based on adjustable rigid as claimed in claim 1 application in HOT CRACK FOR WELDING P is tested.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610120701.8A CN105643131A (en) | 2016-03-03 | 2016-03-03 | Device for testing cold cracking tendency of welding joint on basis of adjustable rigid restraint and apparition of device |
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| CN201610120701.8A CN105643131A (en) | 2016-03-03 | 2016-03-03 | Device for testing cold cracking tendency of welding joint on basis of adjustable rigid restraint and apparition of device |
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| CN108672890A (en) * | 2018-07-24 | 2018-10-19 | 温州大学 | It is a kind of can plus load high-strength steel welding system and welding method |
| CN108723631A (en) * | 2018-06-21 | 2018-11-02 | 天津大学 | Method for determining cracking mechanism of pipe welding joint based on rigidity adjustable constraint test |
| CN109141705A (en) * | 2017-06-19 | 2019-01-04 | 神华集团有限责任公司 | Device and method for testing welding constraint stress |
| CN110539076A (en) * | 2019-09-19 | 2019-12-06 | 天津玛斯特车身装备技术有限公司 | protective gas for laser welding and laser welding method using same |
| CN114002391A (en) * | 2021-11-22 | 2022-02-01 | 江苏科技大学 | Method and device for evaluating welding filler material solidification crack sensitivity |
| CN114136827A (en) * | 2021-08-31 | 2022-03-04 | 江阴兴澄特种钢铁有限公司 | Test method for evaluating hydrogen-induced delayed crack tendency of high-strength steel welding |
| CN114152504A (en) * | 2021-11-22 | 2022-03-08 | 山东钢铁集团日照有限公司 | Rigidity constraint test device and method for evaluating central delamination tendency of welded steel plate |
| CN114166630A (en) * | 2021-11-30 | 2022-03-11 | 天津大学 | Transverse crack sensitivity test device and method based on composite restraint |
| CN115365696A (en) * | 2022-08-25 | 2022-11-22 | 河北鑫达钢铁集团有限公司 | Hot-rolled H-shaped steel weldability test method and device using same |
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| CN109141705A (en) * | 2017-06-19 | 2019-01-04 | 神华集团有限责任公司 | Device and method for testing welding constraint stress |
| CN109141705B (en) * | 2017-06-19 | 2020-12-15 | 神华集团有限责任公司 | Device and method for testing solder restraint stress |
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| CN114136827A (en) * | 2021-08-31 | 2022-03-04 | 江阴兴澄特种钢铁有限公司 | Test method for evaluating hydrogen-induced delayed crack tendency of high-strength steel welding |
| CN114002391A (en) * | 2021-11-22 | 2022-02-01 | 江苏科技大学 | Method and device for evaluating welding filler material solidification crack sensitivity |
| CN114152504A (en) * | 2021-11-22 | 2022-03-08 | 山东钢铁集团日照有限公司 | Rigidity constraint test device and method for evaluating central delamination tendency of welded steel plate |
| CN114002391B (en) * | 2021-11-22 | 2024-03-26 | 江苏科技大学 | Method and device for evaluating solidification crack sensitivity of welding filling material |
| CN114166630A (en) * | 2021-11-30 | 2022-03-11 | 天津大学 | Transverse crack sensitivity test device and method based on composite restraint |
| CN114166630B (en) * | 2021-11-30 | 2023-09-12 | 天津大学 | Transverse crack sensitivity test device and method based on composite restraint |
| CN115365696A (en) * | 2022-08-25 | 2022-11-22 | 河北鑫达钢铁集团有限公司 | Hot-rolled H-shaped steel weldability test method and device using same |
| CN115365696B (en) * | 2022-08-25 | 2023-10-10 | 河北鑫达钢铁集团有限公司 | Hot rolled H-shaped steel weldability test method and device adopting same |
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