CN104842085B - Simulation and experiment method for high-temperature alloy thin-wall pipe surface air hole detects - Google Patents
Simulation and experiment method for high-temperature alloy thin-wall pipe surface air hole detects Download PDFInfo
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- CN104842085B CN104842085B CN201510202450.3A CN201510202450A CN104842085B CN 104842085 B CN104842085 B CN 104842085B CN 201510202450 A CN201510202450 A CN 201510202450A CN 104842085 B CN104842085 B CN 104842085B
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 23
- 239000000956 alloy Substances 0.000 title claims abstract description 23
- 238000004088 simulation Methods 0.000 title claims abstract description 15
- 238000002474 experimental method Methods 0.000 title claims abstract description 14
- 230000007547 defect Effects 0.000 claims abstract description 23
- 239000011148 porous material Substances 0.000 claims description 19
- 238000012360 testing method Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 13
- 238000004080 punching Methods 0.000 claims description 13
- 238000002360 preparation method Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 7
- 238000001514 detection method Methods 0.000 abstract description 5
- 238000002591 computed tomography Methods 0.000 abstract 1
- 238000011156 evaluation Methods 0.000 abstract 1
- 238000011158 quantitative evaluation Methods 0.000 abstract 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 4
- 229910000601 superalloy Inorganic materials 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000000289 melt material Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
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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
- B23K31/125—Weld quality monitoring
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
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- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Mechanical Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a simulation and experiment method for high-temperature alloy thin-wall pipe surface air hole detects. According to the simulation and experiment method, a quantitative evaluation method of the typical high-temperature alloy thin-wall pipe surface air hole defects is established by simulating surface air holes of a welding part and accurately evaluating the air holes. According to the technical scheme, the simulation and experiment method is characterized in that the surface of a welding pipe is perforated through a laser perforating method, and the size and number of the holes are designed and controlled; a nondestructive detection method is used for CT scanning, and the surface diameter and depth of the holes are detected; mechanical properties of the pipe are tested through tensile experiments, and it is guaranteed that the air holes of the pipe are pulled apart; a scanning electron microscope is used for observing the morphology of fractures, the relation between the size of the air holes and tensile performance is determined, and the relation between the number of the air holes and the tensile performance and the relation between the number of the air holes and fracture characteristics are determined; through the experiment means, the relations between the size and number of the air holes, and the performance and the fracture characteristics are obtained, and finally the comprehensive evaluation experiment method for the typical high-temperature alloy thin-wall pipe surface air hole defects is achieved.
Description
Technical field
The present invention is a kind of simulation of high temperature alloy thin-wall pipes surface pores defect and experimental technique, the method laser
Punching, to simulate surface pores, and the technological means using lossless, mechanical test and microscopic analyses, is verified to it, is belonged to
Measurement technical field of measurement and test.
Background technology
For the welding process of tubing, inevitably introduce gas hole defect, many researcheres adopt tension test and
Testing the basic mechanical performance of tubing to simulate its actual operating mode failure conditions, document report, in shadow for fatigue test means
Ring in the many factors of crack initiation, the position of pore is particularly significant, the inefficacy fracture of the actually used part of weldment or simulation
Performance test fracture observation analysis show, the crackle source region of fracture has weld blowhole, the performance impact of defect Welded Joints
Very big, the closer to specimen surface, fatigue crack is easier to be germinated at pore pore.For the thin-wall pipes of wall thickness≤1mm, surface
The simulation of gas hole defect and assessment method are difficult to implement compared with thick-wall tube.Therefore, simulate the surface pores of weldment, and to surface
Pore is accurately evaluated, and sets up the quantitative evaluating method that high temperatures typical alloy thin-wall welds tubing surface defect, becomes welded pipe
The importance of part experimental study, at present appraisal procedure in this respect have no detailed report.
Content of the invention
The present invention is exactly directed to above-mentioned the deficiencies in the prior art and designs and provide a kind of high temperature alloy light-wall pipe
The simulation of material surface pores defect and experimental technique, this simulation and experimental technique are the light-wall pipe accurately evaluating wall thickness≤1mm
The surface pores defect of material provides technical basis and supports, the method adopts laser drilling, in high temperature alloy pipes
Punch in material surface, all less to the oxidation of material, deformation, heat affected area, and adds in welding this inclined plane of tubing
Work hole, Laser Processing is a kind of feasible method, then carries out tension test to high temperature alloy pipe, sets up the different pore size in hole
And quantity and the relation of performance, utilize scanning electron microscopic observation fracture apperance, the result obtaining by above test method simultaneously, be
The comprehensive assessment of high temperature alloy thin walled welds tube surfaces gas hole defect provides foundation.
The purpose of the present invention is achieved through the following technical solutions:
Technical solution of the present invention provides a kind of simulation of high temperature alloy thin-wall pipes surface pores defect and experimental technique,
Wall thickness≤the 1mm of described high temperature alloy thin-wall pipes, it is complete that gb/t28295-2012 is pressed in the manufacture of described high temperature alloy thin-wall pipes
Become it is characterised in that: the step of the method is as follows:
Step one, adopt pulse laser, punch to simulate pore on different high temperature alloy thin wall pipe sample surfaces
Defect, the quantity in hole is 1,2 or 3, and the depth in hole is less than the 1/4 of tube wall thickness, and the tubing at its position vertical of hole is cut
Line direction, the vertical angle deviation in hole is less than 0.02 degree, wherein:
3 punching quantity of preparation are the tubular product sample of 1, and the diameter in hole is respectively 1/2,1/3, the 1/4 of tube wall thickness；
3 punching quantity of preparation are the tubular product samples of 2, and the diameter in 2 holes is identical, respectively tube wall thickness 1/2,
1/3rd, 1/4, two holes are located normal on the same cross section of tubing axis, and the spacing of holes is more than the diameter in one times of hole
And the diameter less than twice hole；
3 punching quantity of preparation are the tubular product samples of 3, and the diameter in 3 holes is identical, respectively tube wall thickness 1/2,
1/3rd, 1/4, the distance between adjacent holes is equal, this distance more than one times of hole diameter and less than twice hole diameter；
The length of tubular product sample is 200mm, the model of the Working position in the hole center both sides 3mm in tubular product sample length
In enclosing；
Method in step 2, reference gb/t 228-2002, to tubular product sample, tubular product sample and pipe on stretching-machine
Material sample carries out tension test, and the fracture position of tension test requires, in the range of the Working position in hole, to record tubular product sample
Post-rift yield strength and tensile strength；
Step 3, the different-diameter for the respective hole of tubular product sample, tubular product sample and tubular product sample, draw and bend
Take the relation curve of intensity, tensile strength；
Tubing for the diameter of same holes, the number in different hole in tubular product sample, tubular product sample and tubular product sample
Sample, draws and yield strength, the relation curve of tensile strength；
Step 4, using scanning electron microscopic observation tubular product sample, tubular product sample and tubular product sample fracture apperance, paint
Tubular product sample processed, the tubular product sample and tubular product sample each different-diameter in hole and fracture source region, expansion area and hit area face
Long-pending relation curve；
It is directed to the diameter of same holes in tubular product sample, tubular product sample and tubular product sample, the pipe of the number in different hole again
Material sample, draws the relation curve with fracture source region, expansion area and hit area area.
Brief description
Fig. 1 is the different-diameter of tubular product sample, tubular product sample and tubular product sample mesopore and tensile strength in embodiment
Relation curve
Fig. 2 is the diameter of same holes in tubular product sample, tubular product sample and tubular product sample in embodiment, different hole
The tubular product sample of number and the relation curve of tensile strength
Fig. 3 is tubular product sample, tubular product sample and the tubular product sample each different-diameter in hole and fracture wink in embodiment
The relation curve of disconnected area area
Fig. 4 is the diameter of same holes in tubular product sample, tubular product sample and tubular product sample in embodiment, different hole
The tubular product sample of number and the relation curve of fracture hit area area
Specific embodiment
Below with reference to drawings and Examples, technical solution of the present invention is further described:
Test material is wrought superalloy gh625, and the thickness of thin-wall pipes is 1mm, this high temperature alloy thin-wall pipes
Manufacture and complete according to gb/t28295-2012 and qs/10-0406-2004, tube surfaces are carried out using method of the present invention
The step of the simulation of gas hole defect and experiment is as follows:
Step one, adopt pulse laser, high energy pulse laser beam focuses on workpiece by focusing system, in focus
Place produces the hot spot of high power density, and this hot spot is irradiated to surface of the work, so that irradiated region temperature is drastically raised, melt material, vapour
Change and form hole, the size in hole moves to determine by xy axle, and punching depth is passed through to adjust single point laser energy, goes out light frequency and weight
Again Number synthesis determine.Width and depth using electronic software control hole.Prefabricated surface pores defect inwall should be smooth, in advance
There is not other defect such as crackle in the surface pores planted agent of system.
Design and control the size and number of laser boring.The quantity in hole is 1,2 or 3, and the depth in hole is 0.25mm, hole
Tubing tangential direction at its position vertical, the vertical angle deviation in hole is less than 0.02 degree.The length of tubular product sample is
200mm, tube outer diameter a size of 18mm, the Working position in hole is in the central weld area of tubular product sample length；Wherein:
3 punching quantity of preparation are the tubular product sample of 1, and the diameter in hole is respectively 0.25mm, 0.35mm, 0.5mm；
3 punching quantity of preparation are the tubular product samples of 2, and the diameter in 2 holes is identical, respectively 0.25mm, 0.35mm,
0.5mm, two holes are located normal on the same cross section of tubing axis, and the spacing of holes is more than the diameter in one times of hole simultaneously
Diameter less than twice hole；
3 punching quantity of preparation are the tubular product samples of 3, and the diameter in 3 holes is identical, respectively 0.25mm, 0.35mm,
0.5mm, the distance between adjacent holes is equal, this distance more than one times of hole diameter and less than twice hole diameter；
Step 2, using lossless detection method ct scanning, detection in the hole whether there is other defect such as crackle, and device to hole
Size detects, is contrasted with the size of software system setting in laser drilling device, the size of final apertures is with laser boring
The size of setting is defined；
Method in step 3, reference gb/t 228-2002, to tubular product sample, tubular product sample and pipe on stretching-machine
Material sample carries out tension test, and the fracture position of tension test requires, in the range of the Working position in hole, to record tubular product sample
Post-rift tensile strength；
Step 4, the different-diameter for the respective hole of tubular product sample, tubular product sample and tubular product sample, draw with anti-
The relation curve of tensile strength, as shown in Figure 1；
Tubing for the diameter of same holes, the number in different hole in tubular product sample, tubular product sample and tubular product sample
Sample, draws the relation curve with tensile strength, as shown in Figure 2；
Step 5, using scanning electron microscopic observation tubular product sample, tubular product sample and tubular product sample fracture apperance, paint
The relation curve of tubular product sample processed, tubular product sample and the tubular product sample each different-diameter in hole and fracture hit area area,
As shown in Figure 3；
It is directed to the diameter of same holes in tubular product sample, tubular product sample and tubular product sample, the pipe of the number in different hole again
Material sample, draws the relation curve with fracture hit area area, as shown in Figure 4.
Technical solution of the present invention adopt laser pulse tubing welding central segment punching, by adjust single point laser energy,
Go out light frequency and number of repetition comprehensively determines the size of punching, using width and the depth of electronic software control hole, can be accurate
The efficiently weld blowhole of simulation tubing.Laser boring is suitable for adding in the big material of high temperature alloy this fusing point high rigidity
Work, the Laser Processing time is shorter, for high temperature alloy, does not result in oxidation, the deformation of material, heat affected area very little, because
This can complete drill process in high quality.Ct scanning can the quality of device to hole be passed judgment on, and whether detection in the hole has the other such as crackle
Defect.By tension test, obtain the curve linear relationship between the size and number in hole and tensile strength, can determine that with hole from curve
Size and number increase, the tensile strength of tubing is gradually lowered, and the quantity in hole is more and when size is larger, tubing
Tensile strength is very low, it is contemplated that abolishing this part when there is intensive or larger-size defect when tubing welding position.By sweeping
Retouch Electronic Speculum detection stretching fracture, obtain the curve linear relationship between the size and number in hole and Fracture Characteristics value, from curve can determine that with
The increase of the size and number in hole, the hit area area of drawing pipe fracture is gradually increased, and shows that tubing bears applied stress
Ability reduce, i.e. intensity decreases.Also refer to that above four curve charts are counter to be pushed away, pore counter can be pushed away by Fracture Characteristics value
Size and welded tube quality, by the numerical value of tensile strength can speculate with the presence or absence of pore etc. other defects.
The comprehensive assessment that high temperatures typical alloy thin-wall welds tubing surface pores defect is achieved by above research technique
Test method, the method wrought superalloy tubing mainly on probation.Above simulation and test appraisal procedure can be used for making pipe
Other wrought superalloys of material are it is known that the intensity of tubing or Fracture Characteristics value can speculate its welding quality.
Claims (1)
1. a kind of simulation of high temperature alloy thin-wall pipes surface pores defect and experimental technique, described high temperature alloy thin-wall pipes
Wall thickness≤1mm, the manufacture of described high temperature alloy thin-wall pipes complete by gb/t28295-2012 it is characterised in that: the method
Step is as follows:
Step one, adopt pulse laser, punch to simulate gas hole defect on different high temperature alloy thin wall pipe sample surfaces,
The quantity in hole is 1,2 or 3, and the depth in hole is less than the 1/4 of tube wall thickness, the tubing tangent line side at its position vertical of hole
To the vertical angle deviation in hole is less than 0.02 degree, wherein:
3 punching quantity of preparation are the tubular product sample of 1, and the diameter in hole is respectively 1/2,1/3, the 1/4 of tube wall thickness；
3 punching quantity of preparation are the tubular product samples of 2, and the diameter in 2 holes is identical, respectively tube wall thickness 1/2,1/3,
1/4, two holes are located normal on the same cross section of tubing axis, and the spacing of holes is more than the diameter in one times of hole little
Diameter in twice hole；
3 punching quantity of preparation are the tubular product samples of 3, and the diameter in 3 holes is identical, respectively tube wall thickness 1/2,1/3,
1/4, the distance between adjacent holes is equal, this distance more than one times of hole diameter and less than twice hole diameter；
The length of tubular product sample is 200mm, the scope of the Working position in the hole center both sides 3mm in tubular product sample length
Interior；
Method in step 2, reference gb/t 228-2002, tries to tubular product sample, tubular product sample and tubing on stretching-machine
Sample carries out tension test, and the fracture position of tension test requires in the range of the Working position in hole, record tubular product sample fracture
Yield strength afterwards and tensile strength；
Step 3, the different-diameter for the respective hole of tubular product sample, tubular product sample and tubular product sample, draw strong with surrender
Degree, the relation curve of tensile strength；
Tubing examination for the diameter of same holes, the number in different hole in tubular product sample, tubular product sample and tubular product sample
Sample, draws and yield strength, the relation curve of tensile strength；
Step 4, using scanning electron microscopic observation tubular product sample, tubular product sample and tubular product sample fracture apperance, draw pipe
Material sample, the tubular product sample and tubular product sample each different-diameter in hole and fracture source region, expansion area and hit area area
Relation curve；
It is directed to the tubing examination of the diameter of same holes in tubular product sample, tubular product sample and tubular product sample, the number in different hole again
Sample, draws the relation curve with fracture source region, expansion area and hit area area.
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| CN115436125A (en) * | 2022-08-31 | 2022-12-06 | 中信戴卡股份有限公司 | A preparation method and application method of a defect sample for X-ray detection |
| CN115870588B (en) * | 2022-11-16 | 2025-06-27 | 上海电气核电设备有限公司 | Preparation method of welding porosity defect simulation specimen and simulation specimen |
| CN120183583B (en) * | 2025-05-16 | 2025-09-02 | 常州润来科技有限公司 | A method and system for testing micropore performance of rare earth microalloyed copper tube ingots |
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| EP1363248A1 (en) * | 2002-05-14 | 2003-11-19 | Siemens Aktiengesellschaft | Method for identifying the condition of a mechanically loaded element, computer system to perform this method, computer program with program-code means and computer program product |
| CN1207550C (en) * | 2003-06-23 | 2005-06-22 | 国电热工研究院 | Test method of high-temp, component creep life |
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| CN104268383B (en) * | 2014-09-17 | 2017-02-22 | 合肥通用机械研究院 | Safety evaluation method for high-temperature pressure pipeline containing crack defects |
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