CN105397435B - A kind of preparation method of tubing welding point fracture toughness test sample - Google Patents
A kind of preparation method of tubing welding point fracture toughness test sample Download PDFInfo
- Publication number
- CN105397435B CN105397435B CN201511021433.6A CN201511021433A CN105397435B CN 105397435 B CN105397435 B CN 105397435B CN 201511021433 A CN201511021433 A CN 201511021433A CN 105397435 B CN105397435 B CN 105397435B
- Authority
- CN
- China
- Prior art keywords
- pipeline section
- briquetting
- arc pipeline
- tubing
- arc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
Abstract
The invention provides a kind of preparation method of tubing welding point fracture toughness test sample, comprise the following steps：Step 1, the joint area bevel (2) to be welded in two tubing (1)；Step 2, after the docking of two tubing (1) in groove (2) place filler wire welding, welding pipeline section (3) will be obtained；Step 3, intercept the arc pipeline section (4) that section in the welding pipeline section (3) is shaped as arc；Step 4, by the arc pipeline section (4) flatten be band sample (5).The sample that the preparation method of the tubing welding point fracture toughness test sample is prepared can be used in testing tubing welding point Fracture Toughness, solves tubing welding point Fracture Toughness in engineering practice and is difficult to the bottleneck problem measured.
Description
Technical field
The present invention relates to welding technical field of measurement and test, a kind of particularly tubing welding point fracture toughness test sample
Preparation method.
Background technology
As the cold rolling of thin-wall pipes, drawing technique are ripe day by day, the performance of thin-wall pipes is gradually stepped up, and it is excellent that it is protruded
Point is while having higher mechanical property and fatigue behaviour, to disclosure satisfy that the light-weighted demand of component.Thin-wall pipes are
In the requirement of the extensive application of the industries such as food machinery, communications and transportation, particularly aerospace field for aircraft loss of weight synergy,
Thin-wall pipes is had in aircraft manufacture field and be more widely applied space.
Thin-wall pipes are mainly used on the medium delivery pipe road that a typical application of aviation field is aero-engine
The media such as fuel oil, hydraulic pressure, lubricating oil and air are conveyed, are the important components of engine accessory system.These thin-wall pipes exist
The stress state of complexity is subject during work, in addition to the pressure of internal liquid or gas is born, also inevitably bears to install
Stress, and the dynamic stress that engine luggine is caused.The failure of aviation thin-wall pipes, there is deep lesson both at home and abroad.According to
Report, abroad in new machine development process, defect and the hot tearing of heat affected area due to thin-wall pipes welding point weld metal zone
Caused by failure, joint oil leakage fault it is very frequent, after aircraft manufacturing or repairing before can also in 50~60 pilot time
The thin-wall pipes failure of appearance 70%~80%；In China's service aircraft (containing engine), tubing malfunction and failure failure is also accounted for always
The 52% of fault rate.There are two kinds of types of attachment between pipe joint and tubing in aero-engine thin-wall pipes component, that is, roll
And welding, welding procedure is more easy to realize relative to rolling technology, therefore is welded in most all use of engine tubes
Form.The main welding method of engine tubes has melting welding, soldering etc., and its joint quality and performance directly affect aviation
The service behaviour and service life of engine.
Welding point fracture toughness is to evaluate the important referential data of joint Anticrack ability, is that welding structure is complete
Whole property parameter important in assessing.Application study for many years is passed through by foreign countries, and the pin under the normal temperature environment of maturation has been formd at present
Pipeline, the isostructural integrity assessment specification of bridge are held to pressure, some have also been formulated in the welding structure of aviation field complete
The method of testing of joint breaking toughness is included in whole property review approach, these evaluating regulations.
The country is concentrated mainly under the structure use environment such as pressure vessel, pipeline in the research in terms of civil area at present
Performance test and life appraisal；For the titanium alloy fusion welds joint used in aero-engine fatigue life carried out it is more
Research, the Fatigue Crack Growth and fatigue surplus life of such as titanium alloy EBW joints, titanium alloy welding joint
Fatigue Damage Evolution scale-model investigation, the evolution research of TC11 titanium alloy weldings fatigue damage branch etc..
There is weld defect, welding residual stress, external force damage, local stress in aero-engine thin-wall pipes welding point
Collect the factor of medium influence structural intergrity, inevitably occur the damage of structure, the height of degree of injury in use
It is low to determine that can welding structure be continuing with.The analysis of welding structure fracture toughness is set up mostly at present slab construction,
On the basis of certain thickness three point bending test or compact tension specimen experiment.For tubing welding structure, because that can not prepare
Fracture toughness test sample and lack Analysis of fracture toughness means, it would be highly desirable to take the necessary measures solution this technical bottleneck.
The content of the invention
The problem of in order to solve that in the prior art fracture toughness test sample can not be prepared, the present invention provides a kind of tubing weldering
The preparation method of joint breaking toughness test sample is connect, prepared by the preparation method of the tubing welding point fracture toughness test sample
The sample gone out can be used in testing tubing welding point Fracture Toughness, solve tubing welding point fracture toughness in engineering practice
Value is difficult to the bottleneck problem measured.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of preparation method of tubing welding point fracture toughness test sample, comprises the following steps：
Step 1, the joint area bevel to be welded in two tubing；
Step 2, by after the docking of two tubing at groove filler wire welding, obtain welding pipeline section；
Step 3, intercept the welding pipeline section and interrupt face and be shaped as the arc pipeline section of arc；
Step 4, by the arc pipeline section flatten be band sample.
The beneficial effects of the invention are as follows the examination that the preparation method of, the tubing welding point fracture toughness test sample is prepared
The performance of sample and the degree of approximation of true tubing welding point can reach more than 85%, thus tubing welding point fracture is tough
The sample that the preparation method of property test sample is prepared can objectively reflect the fracture toughness of true tubing welding point, the examination
Sample can be used for testing tubing welding point Fracture Toughness, so that it is tough to solve tubing welding point fracture in engineering practice
Property value is difficult to the bottleneck problem measured.
Brief description of the drawings
The present invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the bevelled schematic diagram of joint area to be welded of two tubing.
Fig. 2 is the schematic diagram of the postwelding of two tubing.
Fig. 3 is the schematic diagram of arc pipeline section.
Fig. 4 is the schematic diagram that the first briquetting presses arc pipeline section.
Fig. 5 is the schematic diagram that the second briquetting presses arc pipeline section.
Fig. 6 is the schematic diagram that the 3rd briquetting presses arc pipeline section.
Fig. 7 is that arc pipeline section is depressed into the after-applied pressure of extreme position and the schematic diagram of time by the second briquetting.
Fig. 8 is the schematic diagram of band sample gap.
Description of reference numerals：
1. tubing, 2. grooves, 3. welding pipeline sections, 4. arc pipeline sections, 5. band samples, 6. breach, 7. weld seams,
11. the first briquetting, 12. second briquettings, 11. the 3rd briquettings.
Embodiment
In order to which technical characteristic, purpose and effect to the present invention are more clearly understood from, now control illustrates this hair
Bright embodiment.
A kind of preparation method of tubing welding point fracture toughness test sample, comprises the following steps：
Step 1, the joint area bevel 2 to be welded in two tubing 1, as shown in Figure 1；
Step 2, two tubing 1 are docked after at groove 2 filler wire welding, obtain weld pipeline section 3, as shown in Figure 2；
Step 3, the arc pipeline section 4 that section in the welding pipeline section 3 is shaped as arc is intercepted, as shown in Figure 3；
Step 4, the arc pipeline section 4 flattened as band sample 5, shown in Fig. 4 to Fig. 5.
In the step 1 of the present embodiment, the internal diameter of tubing 1 is 45mm~55mm, the wall thickness of tubing 1 for 2.5mm~
3.5mm, along the axis direction of tubing 1, the length of a tubing 1 is 50mm~70mm.In step 2, front on welding pipeline section 3
Welding reinforcement be less than 1mm, welding pipeline section 3 on the back side welding reinforcement be less than 0.5mm, its weld pipeline section 3 on front for weldering
Weld the inner surface of pipeline section 3 in the back side on the outer surface of nozzle belt 3, welding pipeline section 3.In step 3, along the week of welding pipeline section 3
To the arc length of the inner surface of arc pipeline section 4 is 25mm~30mm, along the axis direction of welding pipeline section 3, the length of arc pipeline section 4
For 100mm~140mm, weld seam 7 is located at the center of arc pipeline section 4, axis direction of the weld seam 7 perpendicular to welding pipeline section 3.
In the step 4 of the present embodiment, by the arc pipeline section 4 flatten for band sample 5 (band sample 5 containing length and
Width, the length of band sample 5 is more than width) comprise the following steps：
Step 4.1, make the opening down of the arc pipeline section 4, flattened arc pipeline section 4 with the first briquetting 11, the first briquetting
11 working face is rectangle, and the width of the working face of the first briquetting 11 is more than the circumferential width of arc pipeline section 4, the first briquetting 11
The length of working face is more than the axial length of arc pipeline section 4, length direction and the arc pipeline section 4 of the working face of the first briquetting 11
Axially in parallel, the pressure limit of the first briquetting 11 pressing arc pipeline section 4 is 10kN~30kN, as shown in figure 4, the first briquetting 11 is pressed
The whole surface of arc pipeline section 4 is pressed.
Step 4.2, make the circumference (width) of the second briquetting 12 arcuately pipeline section 4 mobile and pressing arc pipeline section successively
4, the second briquetting 12 presses the whole surface of an arc pipeline section 4, and the working face of the second briquetting 12 is rectangle, the second briquetting 12
The width of working face is 1st/1st to three/2nd of the circumferential width of arc pipeline section 4, the length of the working face of the second briquetting 12
Degree is more than the axial length of arc pipeline section 4, and it is the second briquetting 12 that the second briquetting 12 presses the distance moved after arc pipeline section 4 every time
Face width 1/1st to three/2nd, the length direction of the second briquetting 12 and the axis direction of arc pipeline section 4 are put down
OK, the pressure limit of the second briquetting 12 pressing arc pipeline section 4 is 5kN~10kN, as shown in figure 5, under the first time of the second briquetting 12
Press to be shown in solid in Fig. 5, after pushing once, the second briquetting 12 returns and is moved to the left the face width of the second briquetting 12
1/1st to three/2nd, then proceed to push, move in circles, as shown in broken line in fig. 5, the dashed surface is next time
The depressed position of second briquetting 12, for the ease of observation position, the longitudinal direction of the second briquetting 12 pushed every time being represented by dotted lines
Staggered certain spacing, when actually pushing, and the second briquetting 12 moves up and down the surface of pressing arc pipeline section 4 every time.
Step 4.3, make the circumference (width) of the 3rd briquetting 13 arcuately pipeline section 4 mobile and pressing arc pipeline section successively
4, the 3rd briquetting 13 presses the whole surface of an arc pipeline section 4, and the working face of the 3rd briquetting 13 is rectangle, the 3rd briquetting 13
The width of working face for arc pipeline section 4 circumferential width a quarter to 1/5th, the 3rd briquettings 13 working face length
Degree is more than the axial length of arc pipeline section 4, and it is the 3rd briquetting 13 that the 3rd briquetting 13 presses the distance moved after arc pipeline section 4 every time
Face width 1/1st to three/2nd, the length direction of the 3rd briquetting 13 and the axis direction of arc pipeline section 4 are put down
OK, the pressure limit of the 3rd briquetting 13 pressing arc pipeline section 4 is 5kN~10kN, as shown in fig. 6, under the first time of the 3rd briquetting 13
Press to be shown in solid in Fig. 5, after pushing once, the 3rd briquetting 13 returns and is moved to the left the face width of the 3rd briquetting 13
1/1st to three/2nd, then proceed to push, move in circles, as shown in the dotted line in Fig. 6, the dashed surface is next time
The depressed position of 3rd briquetting 13.
It is preferred that, in step 4.2, arc pipeline section 4 is depressed into after extreme position by the second briquetting 12 every time when applying one section
Between the first change pressure just leave the arc pipeline section 4, first change pressure and between the force time be SIN function relation,
As shown in Figure 7.Even if arc pipeline section 4 is depressed into after extreme position by the second briquetting 12 every time applies vibration to the arc pipeline section 4, this
When, the peak value of first change pressure pressing arc pipeline section 4 is not higher than 10kN, such as 8kN.In step 4.3, the 3rd briquetting 13 is every
Secondary be depressed into arc pipeline section 4 applies the second change pressure of a period of time and just leaves the arc pipeline section 4 after extreme position, this
It is SIN function relation between two change pressures and force time.Even if arc pipeline section 4 is depressed into the limit by the 3rd briquetting 13 every time
The arc pipeline section 4 is applied behind position and vibrated, now, the peak value of second change pressure pressing arc pipeline section 4 is not higher than 10kN,
Such as 8kN.
Step 4.4, make the axial direction (length direction) of the second briquetting 12 arcuately pipeline section 4 mobile and pressing arc pipeline section successively
4, the second briquetting 12 presses the whole surface of an arc pipeline section 4, the second briquetting 12 move every time after pressing arc pipeline section 4 away from
From the length direction and arc pipeline section of 1/1st to three/2nd of the face width for the second briquetting 12, second briquetting 12
4 circumference is parallel, and the pressure limit of the second briquetting 12 pressing arc pipeline section 4 is 5kN~10kN.
Step 4.5, make the axial direction (length direction) of the 3rd briquetting 13 arcuately pipeline section 4 mobile and pressing arc pipeline section successively
4, the 3rd briquetting 13 presses the whole surface of an arc pipeline section 4, the 3rd briquetting 13 move every time after pressing arc pipeline section 4 away from
From the length direction and arc pipeline section of 1/1st to three/2nd of the face width for the 3rd briquetting 13, the 3rd briquetting 13
4 circumference is parallel, and the pressure limit of the 3rd briquetting 13 pressing arc pipeline section 4 is 5kN~10kN.
In step 4.4, arc pipeline section 4 is depressed into by the second briquetting 12 every time applies the of a period of time after extreme position
One change pressure just leaves the arc pipeline section 4, first change pressure and between the force time be SIN function relation, such as Fig. 7
It is shown.Even if arc pipeline section 4 is depressed into after extreme position by the second briquetting 12 every time applies vibration to the arc pipeline section 4, now, should
The pressure limit of first change pressure pressing arc pipeline section 4 is 5kN~10kN.In step 4.5, the 3rd briquetting 13 is every time by arc
Shape pipeline section 4, which is depressed into, to be applied the second change pressure of a period of time and just leaves the arc pipeline section 4 after extreme position, second change
It is SIN function relation between pressure and force time.Even if arc pipeline section 4 is depressed into after extreme position by the 3rd briquetting 13 every time
The arc pipeline section 4 is applied and vibrated, now, the pressure limit of second change pressure pressing arc pipeline section 4 is 5kN~10kN.
In the present embodiment, the preparation method of the tubing welding point fracture toughness test sample also includes：Step 5,
Band sample 5 is heat-treated；
Step 5 comprises the following steps：
Step 5.1, band sample 5 is heated to 250 DEG C~350 DEG C, programming rate is 50 DEG C/h~80 DEG C/h；
Step 5.2, band sample 5 is heated to 350 DEG C~400 DEG C, programming rate is 50 DEG C/h；
Step 5.3, band sample 5 is incubated 15min~25min；
Step 5.4, band sample 5 is cooled to room temperature, cooling velocity is not more than 200 DEG C/h.
In the present embodiment, the preparation method of the tubing welding point fracture toughness test sample also includes：
Step 6, to band sample 5 carry out sample cut, corrode and mark, it is described cut for by width in 25mm~30mm
Arc pipeline section 4 in the middle of 20mm part take out, i.e., band sample 5 becomes width for 20mm after cutting, and length is not
The sample to be tested become.
Step 7, to the gap 6 of band sample 5, as shown in figure 8, obtaining in final fracture toughness test sample, Fig. 8
Dimensional units are mm.
The tubing using joint material as TC4 is in order to introduce the preparation side of tubing welding point fracture toughness test sample below
Method,
The external diameter 50mm of first tubing 1, wall thickness 3mm, material is TC4, and length is 50mm, the external diameter 50mm of the second tubing 1,
Wall thickness 3mm, material is TC4, and length is 50mm, after filling TC4 welding wire welding as indicated with 2.The welding pipeline section 3 of postwelding is through X-ray
The circumference of zero defect, arcuately pipeline section 4 is detected, the inner side arc length of arc pipeline section 4 is in 30mm.Arc pipeline section 4 is first suppressed, after
Be heat-treated, and heat treatment after band sample 5 should be heat-treated with postwelding homogeneous tube after microstructure, hardness it is identical with
Parallel-segment cuts the wide plate welding joints of 20mm in pipeline section afterwards, and Three Points Bending Specimen is made.Prepare before Three Points Bending Specimen, should
First corrode and weld seam, heat affected area and be marked；During preparing Three Points Bending Specimen, using wire cutting mode in weld seam or
Heat affected area prepares micro-crack, and should carry out three point bending test respectively to the weld seam of Three Points Bending Specimen, welding heat affected zone,
Obtain Fracture Toughness.By weld seam metallograph, several regions such as weld seam, heat affected area and mother metal can be substantially observed,
And weld seam, heat affected area crystal grain have the tendency of to grow up, meet thin-wall pipes welding point feature.Break for measuring thin-wall pipes
Welding point metallographic structure, the microhardness for splitting toughness value are identical with actual thin-wall pipes welding point.Thus tubing weldering
True tubing welding point can objectively be reflected by connecing the sample that the preparation method of joint breaking toughness test sample prepares
Fracture toughness, the sample can be used for testing tubing welding point Fracture Toughness, so as to solve tubing in engineering practice
Welding point Fracture Toughness is difficult to the bottleneck problem measured.
Table 1 is according to BS7448-1《Determine the KIC of metal material, critical CTOD and critical J-integral test method》Test
The material fracture toughness K of gainedqValue, in test process, enters line label, wherein H2 represents TC4 calorimetrics to test sample respectively
The zone of influence, F2 represent that TC4 is surveyed at melt run, W is expressed as Weld pipe mill, F5 and is expressed as at TA16 survey melt runs.Experiment is obtained simultaneously
To 2.5 (KQ/σS)2And Fmax/FQ, it is possible to use the two parameter decision material fracture toughnesses KqWhether value is the disconnected of material
Split toughness KICValue.Fracture toughness K obtained by the methodqValue, less than thin-wall pipes actual crack toughness value, can be used as thin-walled
The reference of tubing Fracture Toughness, for characterizing thin-wall pipes Resisting fractre ability, the weight of structure design is carried out as designing unit
Refer to.By substantial amounts of analysis of experimental data, the preparation method of the tubing welding point fracture toughness test sample is prepared
The performance of sample and the degree of approximation of true tubing welding point can reach more than 85%,
The fracture toughness kq values of table 1
Schematical embodiment of the invention is the foregoing is only, the scope of the present invention is not limited to.It is any
Those skilled in the art, the equivalent variations made on the premise of the design of the present invention and principle is not departed from and modification, all should
Belong to the scope of protection of the invention.And it should be noted that the present invention each part be not limited in above-mentioned entirety should
With each technical characteristic described in specification of the invention can select one individually to use or select multinomial according to actual needs
Combine and use, therefore, the present invention naturally covers other relevant with this case innovative point and combined and concrete application.
Claims (9)
1. a kind of preparation method of tubing welding point fracture toughness test sample, it is characterised in that the tubing welding point
The preparation method of fracture toughness test sample comprises the following steps：
Step 1, the joint area bevel (2) to be welded in two tubing (1)；
Step 2, after the docking of two tubing (1) in groove (2) place filler wire welding, welding pipeline section (3) will be obtained；
Step 3, intercept the arc pipeline section (4) that section in the welding pipeline section (3) is shaped as arc；
Step 4, by the arc pipeline section (4) flatten be band sample (5)；
In step 4, the arc pipeline section (4) is flattened and comprised the following steps for band sample (5)：
Step 4.1, make the opening down of the arc pipeline section (4), flattened arc pipeline section (4) with the first briquetting (11), the first pressure
The working face of block (11) is rectangle, and the width of the working face of the first briquetting (11) is more than the circumferential width of arc pipeline section (4), first
The length of the working face of briquetting (11) is more than the axial length of arc pipeline section (4), the length side of the working face of the first briquetting (11)
To axially in parallel with arc pipeline section (4), the pressure limit of the first briquetting (11) pressing arc pipeline section (4) is 10kN~30kN；
Step 4.2, make the circumference of the second briquetting (12) arcuately pipeline section (4) mobile and pressing arc pipeline section (4) successively, second presses
The working face of block (12) is rectangle, and the width of the working face of the second briquetting (12) is two points of the circumferential width of arc pipeline section (4)
One of to 1/3rd, second briquettings (12) working face length be more than arc pipeline section (4) axial length, the second briquetting
(12) pressing arc pipeline section (4) distance that moves afterwards is 1 to three/2nd point of the face width of the second briquetting (12) every time
One of, the length direction of the second briquetting (12) is parallel with the axis direction of arc pipeline section (4), the second briquetting (12) pressing curved pipe
The pressure limit of section (4) is 5kN~10kN；
Step 4.3, make the circumference of the 3rd briquetting (13) arcuately pipeline section (4) mobile and pressing arc pipeline section (4) successively, the 3rd presses
The working face of block (13) is rectangle, and the width of the working face of the 3rd briquetting (13) is four points of the circumferential width of arc pipeline section (4)
One of to 1/5th, the 3rd briquettings (13) working face length be more than arc pipeline section (4) axial length, the 3rd briquetting
(13) pressing arc pipeline section (4) distance that moves afterwards is 1 to three/2nd point of the face width of the 3rd briquetting (13) every time
One of, the length direction of the 3rd briquetting (13) is parallel with the axis direction of arc pipeline section (4), the 3rd briquetting (13) pressing curved pipe
The pressure limit of section (4) is 5kN~10kN.
2. the preparation method of tubing welding point fracture toughness test sample according to claim 1, it is characterised in that
In step 1, the internal diameter of tubing (1) is 45mm~55mm, and the wall thickness of tubing (1) is 2.5mm~3.5mm.
3. the preparation method of tubing welding point fracture toughness test sample according to claim 1, it is characterised in that
In step 2, weld the welding reinforcement that positive welding reinforcement is less than the back side on 1mm, welding pipeline section (3) on pipeline section (3) and be less than
0.5mm。
4. the preparation method of tubing welding point fracture toughness test sample according to claim 1, it is characterised in that
In step 3, along the circumference of welding pipeline section (3), the arc length of the inner surface of arc pipeline section (4) is 25mm~30mm, along welding pipeline section
(3) axis direction, the length of arc pipeline section (4) is 100mm~140mm.
5. the preparation method of tubing welding point fracture toughness test sample according to claim 1, it is characterised in that
In step 4.2, arc pipeline section (4) is depressed into the first change for applying a period of time after extreme position by the second briquetting (12) every time
Pressure just leaves the arc pipeline section (4), first change pressure and be SIN function relation between action time, first change
The peak value of pressure is not higher than 10kN.
6. the preparation method of tubing welding point fracture toughness test sample according to claim 1, it is characterised in that
In step 4.3, arc pipeline section (4) is depressed into the second change for applying a period of time after extreme position by the 3rd briquetting (13) every time
Pressure just leaves the arc pipeline section (4), second change pressure and be SIN function relation between action time, second change
The peak value of pressure is not higher than 10kN.
7. the preparation method of tubing welding point fracture toughness test sample according to claim 1, it is characterised in that step
Rapid 4 is further comprising the steps of：
Step 4.4, make the second briquetting (12) arcuately the axial movement of pipeline section (4) and successively pressing arc pipeline section (4), second pressure
Block (12) distance that pressing arc pipeline section (4) is moved afterwards every time is 1st to three/2nd of the face width of the second briquetting (12)
/ mono-, the length direction of the second briquetting (12) is parallel with the circumference of arc pipeline section (4), the second briquetting (12) pressing arc pipeline section
(4) pressure limit is 5kN~10kN；
Step 4.5, make the 3rd briquetting (13) arcuately the axial movement of pipeline section (4) and successively pressing arc pipeline section (4), the 3rd pressure
Block (13) distance that pressing arc pipeline section (4) is moved afterwards every time is 1st to three/2nd of the face width of the 3rd briquetting (13)
/ mono-, the length direction of the 3rd briquetting (13) is parallel with the circumference of arc pipeline section (4), the 3rd briquetting (13) pressing arc pipeline section
(4) pressure limit is 5kN~10kN.
8. the preparation method of tubing welding point fracture toughness test sample according to claim 1, it is characterised in that institute
Stating the preparation method of tubing welding point fracture toughness test sample also includes：Step 5, band sample (5) is heat-treated；
Step 5 comprises the following steps：
Step 5.1, band sample (5) is heated to 250 DEG C~350 DEG C, programming rate is 50 DEG C/h~80 DEG C/h；
Step 5.2, band sample (5) is heated to 350 DEG C~400 DEG C, programming rate is 50 DEG C/h；
Step 5.3, by band sample (5) be incubated 15min~25min；
Step 5.4, band sample (5) is cooled to room temperature, cooling velocity is not more than 200 DEG C/h.
9. the preparation method of tubing welding point fracture toughness test sample according to claim 8, it is characterised in that institute
Stating the preparation method of tubing welding point fracture toughness test sample also includes：
Step 6, sample cuts, corrodes and marked；
Step 7, to band sample (5) gap (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511021433.6A CN105397435B (en) | 2015-12-30 | 2015-12-30 | A kind of preparation method of tubing welding point fracture toughness test sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511021433.6A CN105397435B (en) | 2015-12-30 | 2015-12-30 | A kind of preparation method of tubing welding point fracture toughness test sample |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105397435A CN105397435A (en) | 2016-03-16 |
| CN105397435B true CN105397435B (en) | 2017-07-28 |
Family
ID=55463363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511021433.6A Active CN105397435B (en) | 2015-12-30 | 2015-12-30 | A kind of preparation method of tubing welding point fracture toughness test sample |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105397435B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109682658B (en) * | 2018-12-27 | 2021-06-01 | 中国石油天然气集团有限公司 | DWTT test sample for avoiding DWTT abnormal fracture of large-wall-thickness high-toughness X80 steel pipe and method thereof |
| CN111766094A (en) * | 2020-05-19 | 2020-10-13 | 巨力索具股份有限公司 | Sampling method for butt joint of round steel and pipe |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101271048B (en) * | 2008-05-04 | 2011-01-19 | 天津钢管集团股份有限公司 | Small-caliber steel pipe lateral impact sample flattening method |
| CN201540225U (en) * | 2009-09-25 | 2010-08-04 | 上海宝钢工业检测公司 | Mould for flattening tensile sample of UOE welding tube |
| CN103323297B (en) * | 2013-03-18 | 2015-06-24 | 上海振华重工(集团)股份有限公司 | Fatigue crack prefabricating method for fracture sample of high-strength steel welding joint |
| CN104070263B (en) * | 2013-03-29 | 2016-07-13 | 中国石油天然气集团公司 | V150 steel grade oil well casing Full scale testing preparation method of sample |
| JP2015227859A (en) * | 2014-06-03 | 2015-12-17 | 株式会社ケーヒン | Creation method of solder test piece |
| CN104931321B (en) * | 2015-06-25 | 2017-12-29 | 青岛武船重工有限公司 | Sample for testing seamless steel pipe Z-direction performance and preparation method thereof |
| CN105149880B (en) * | 2015-09-16 | 2017-10-27 | 中国航空工业集团公司北京航空材料研究院 | A kind of preparation method of the fatigue test piece of high temperature alloy thin walled welds tubing |
-
2015
- 2015-12-30 CN CN201511021433.6A patent/CN105397435B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105397435A (en) | 2016-03-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2452779C2 (en) | Welded structures from rustproof alloys in structures and pipelines from carbon steel sustaining high axial plastic strains | |
| Yeom et al. | Integrity assessment of API X70 pipe with corroded girth and seam welds via numerical simulation and burst test experiments | |
| CN105397435B (en) | A kind of preparation method of tubing welding point fracture toughness test sample | |
| Ameli et al. | Determination of CMOD-force curves and R-curves in side-grooved single edge notched tensile (SENT) specimens in welded X42 pipeline steel | |
| Liu et al. | Strain-based design and assessment in critical areas of pipeline systems with realistic anomalies | |
| CN103196715B (en) | A kind of processing method of Charpy bar | |
| Oh | Bending fatigue strength and the effect of assembling stress on fillet welded joints of catalyst muffler flange pipes | |
| Igi et al. | Strain Capacity of 48" OD X80 Pipeline in Pressurized Full-scale Bending Test | |
| Igi et al. | Tensile strain capacity of X80 pipeline under tensile loading with internal pressure | |
| Ning et al. | Stress state analysis of root notch for X80 girth welds with variable wall thickness and misalignment geometric features | |
| Radu et al. | Structural integrity of a wind loaded cylindrical steel shell structure | |
| Liu et al. | Investigation of weld cracking of a BOG booster pipeline in an LNG receiving station | |
| Baek et al. | Influence of welding processes and weld configurationon fatigue failure of natural gas branch pipe | |
| Tewari et al. | A case study: Failure analysis of crude oil pipeline rupture | |
| Kalyanam et al. | Mode mixity in the fracture toughness characterization of HAZ material using SEN (T) testing | |
| Höhler et al. | Influence of material heterogeneity on the strain capacity of pipelines | |
| CN201225491Y (en) | Oil delivery pipeline on-line restoring reinforced structure | |
| Wang et al. | Verification Analysis of X70 Type B Sleeve for In-service Pipeline Repair | |
| Shen et al. | Fracture toughness testing of pipeline girth welds | |
| Darcis et al. | Fatigue Qualification of Heavy Wall Line Pipe and Girth Weld for High Pressure Applications | |
| Park et al. | Interlaboratory Study of All-Weld-Metal Strip Tensile Testing of Narrow Groove Pipeline Girth Welds | |
| Jia et al. | Material Properties and Flaw Characteristics of Vintage Girth Welds | |
| Andrews et al. | Estimation of residual stress levels in fitness for service evaluations of linepipe | |
| Uddin et al. | Fracture Toughness of Welds Using As-Welded-Geometry/SENT Specimens | |
| Morgan et al. | The use of automated ultrasonic testing (AUT) in pipeline construction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100024 North East military villa, eight Li bridge, Chaoyang District, Beijing Patentee after: China Institute of Aeronautical Manufacturing Technology Address before: 100024 North East military villa, eight Li bridge, Chaoyang District, Beijing Patentee before: Beijing Aviation Manufacturing Engineering Institute of China Aviation Industry Group Company |