CN114544359A - Method and device for testing strength and plasticity of titanium alloy welding strip - Google Patents
Method and device for testing strength and plasticity of titanium alloy welding strip Download PDFInfo
- Publication number
- CN114544359A CN114544359A CN202210120922.0A CN202210120922A CN114544359A CN 114544359 A CN114544359 A CN 114544359A CN 202210120922 A CN202210120922 A CN 202210120922A CN 114544359 A CN114544359 A CN 114544359A
- Authority
- CN
- China
- Prior art keywords
- welding strip
- titanium alloy
- plasticity
- testing
- strength
- 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.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 108
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000012360 testing method Methods 0.000 title claims abstract description 33
- 229910000679 solder Inorganic materials 0.000 claims abstract description 20
- 238000006073 displacement reaction Methods 0.000 claims abstract description 6
- 238000012545 processing Methods 0.000 claims abstract description 3
- 230000007246 mechanism Effects 0.000 claims description 22
- 230000001681 protective effect Effects 0.000 claims description 16
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000010998 test method Methods 0.000 claims description 2
- 238000007689 inspection Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- 229910052719 titanium Inorganic materials 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 241000221535 Pucciniales Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a method and a device for testing the strength and the plasticity of a titanium alloy welding strip, and belongs to the technical field of welding material inspection. The problem of prior art can't measure the intensity and the plasticity index of titanium alloy solder strip is solved. The method comprises the steps of intercepting a titanium alloy welding strip with a certain length, processing two notches at the center of the welding strip in the length direction, symmetrically arranging the two notches along the width direction of the welding strip, and marking the positions 5mm away from the center of each of the two notches; installing the treated titanium alloy welding strip into a testing device, stretching the welding strip through the testing device until the welding strip is broken, and recording the tensile stress and displacement curve in the stretching process through a computer to obtain the maximum tensile force of the welding strip; the broken welding strips are closed tightly, and the distance between the two mark positions is measured; and calculating the plasticity and tensile strength of the titanium alloy welding strip through a formula. The method is mainly used for testing the strength and the plasticity of the alloy welding strip.
Description
Technical Field
The invention belongs to the technical field of welding material inspection, and particularly relates to a method and a device for testing the strength and the plasticity of a titanium alloy welding strip.
Background
The titanium alloy has the characteristics of low density, high specific strength, excellent corrosion resistance and the like, and is widely applied to the fields of aerospace, weaponry and nuclear power equipment manufacturing. Especially in the field of nuclear submarines, titanium alloy is widely applied due to the non-magnetic characteristic of the titanium alloy. However, in the service application process of equipment such as a nuclear submarine, corrosion pits, rusts and the like are formed on the surface of the titanium alloy shell due to corrosion of the titanium alloy shell when the titanium alloy shell is contacted with a medium with strong seawater corrosion for a long time, and certain threat is caused to the safe and stable operation of the nuclear submarine, so that after the nuclear submarine operates for a period of time, the surface of the titanium alloy shell needs to be maintained and repaired in time, and at this time, the surface of the titanium alloy shell needs to be subjected to surfacing so as to ensure the safe and reliable operation in the later period.
The titanium alloy strip surfacing method is widely used in surface repair of titanium alloy nuclear submarines due to high efficiency and simple welding process and equipment. The strength and plasticity of the titanium alloy welding strip have great influence on the strength and plasticity of the surfacing cladding metal, so that the quality of the titanium alloy welding strip is very important. In addition, in the manufacturing process of the titanium alloy flux-cored wire, the outer skin wrapping the flux-cored powder is also formed by rolling the titanium alloy welding strip, and the strength and the plasticity of the titanium alloy welding strip also determine the difficulty degree of the drawing and reducing process of the titanium alloy flux-cored wire in the subsequent production process of the welding wire, so that certain influence is generated on the welding manufacturability of the flux-cored wire. Therefore, the strength and plasticity indexes of the titanium alloy welding strip are very important and critical.
Disclosure of Invention
In view of this, the present invention provides a method and a device for testing strength and plasticity of a titanium alloy solder strip, so as to solve the problem that the strength and plasticity indexes of the titanium alloy solder strip cannot be measured in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: a method for testing the strength and the plasticity of a titanium alloy welding strip comprises the following steps:
step 1: cutting a certain length of the titanium alloy welding strip, processing two notches at the center of the welding strip in the length direction, symmetrically arranging the two notches along the width direction of the welding strip, and marking the positions 5mm away from the center of each notch;
step 2: installing the treated titanium alloy welding strip into a testing device, stretching the welding strip by the testing device until the welding strip is broken, and recording the tensile stress and displacement curve in the stretching process by a computer to obtain the maximum tensile force F of the welding stripnIn the unit of N;
and step 3: the broken solder strips are closed, and the distance between two mark positions is measured to be L1；
And 4, step 4: calculating the elongation A after fracture of the titanium alloy welding strip through a formula (1), evaluating the plasticity of the titanium alloy welding strip through the elongation A after fracture,
in the formula:
a-elongation after break (%),
L1-the spacing (mm) of two marked locations of the solder strip;
and 5: calculating the tensile strength R of the titanium alloy welding strip by the formula (2)S
In the formula:
RS-the tensile strength (MPa) of the solder strip,
s-effective area of welding strip (mm)2)，
H-gap length (mm)
B-width of the welding strip (mm),
delta-weld strip thickness (mm).
Further, the length of the titanium alloy welding strip is 200 mm.
Furthermore, the notch in the step 1 is in a V-shaped structure.
Further, the single side angle of the V-shaped notch is 20 degrees.
Further, when B/delta is less than or equal to 5, the gap length H is 2.5mm, and when B/delta is greater than 5, the gap length H is 1.0 mm.
Further, the test method simultaneously performs the measurement of two solder strips.
The invention also provides a device for testing the strength and the plasticity of the titanium alloy welding strip, which comprises a protective shell, a cross beam, a stretching mechanism, welding strip clamps and a driving mechanism, wherein the upper part and the lower part of the inner side of the protective shell are respectively connected with the cross beam, the stretching mechanism comprises two stretching rods, the two stretching rods respectively penetrate through the upper end and the lower end of the protective shell and are respectively connected with the cross beam positioned at the upper part and the lower part of the protective shell, one ends of the two stretching rods are provided with the welding strip clamps, the two welding strip clamps are oppositely arranged, the two welding strip clamps respectively clamp two ends of the welding strip, the other ends of the stretching rods are connected with the driving mechanism, and the stretching rods are driven by the driving mechanism to move along the vertical direction.
Furthermore, the stretching rod is a screw rod, the screw rod is in threaded connection with the protective shell and the cross beam, the driving mechanism is a motor, and the screw rod is driven to rotate through the motor.
Furthermore, the welding strip clamp is provided with patterns, and the welding strip clamp is connected with the welding strip through the patterns.
Further, the number of the stretching mechanisms is two.
Compared with the prior art, the invention has the beneficial effects that: the method can measure the strength and plasticity indexes of the titanium alloy welding strip, can accurately obtain the strength and plasticity indexes of the titanium alloy welding strip, is simple to operate, and provides technical support for surfacing repair of the titanium alloy and preparation of the titanium alloy flux-cored wire.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of a treated titanium alloy weld strip according to the present invention;
FIG. 2 is a schematic side view of a treated titanium alloy weld strip according to the present invention;
FIG. 3 is a stress-strain plot of a first titanium alloy weld bead in accordance with an embodiment of the present invention;
FIG. 4 is a stress-strain plot of a second titanium alloy weld bead according to an embodiment of the present disclosure;
FIG. 5 is a schematic structural view of a device for testing strength and plasticity of a titanium alloy welding strip according to the present invention;
FIG. 6 is a schematic perspective view of a device for testing strength and plasticity of a titanium alloy solder strip according to the present invention.
1-protective shell, 2-beam, 3-screw, 4-welding strip clamp, 5-welding strip, and 6-motor.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely explained below with reference to the drawings in the embodiments of the present invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict, and the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments.
Referring to fig. 1-6, the method for testing the strength and the plasticity of the titanium alloy solder strip in the embodiment comprises the following steps:
step 1: cutting a certain length of the titanium alloy welding strip, wherein any method can be adopted for cutting, but the titanium strip is ensured not to deform in the cutting process, the two ends of the titanium alloy are smooth and neat, two notches are machined in the center of the length direction of the welding strip, the two notches are symmetrically arranged along the width direction of the welding strip, and the marks are respectively marked at the positions 5mm away from the center of each notch;
step 2: installing the treated titanium alloy welding strip into a testing device, stretching the welding strip by the testing device until the welding strip is broken, and recording the tensile stress and displacement curve in the stretching process by a computer to obtain the maximum tensile force F of the welding stripnIn the unit of N;
and step 3: the broken solder strips are closed, and the distance between two mark positions is measured to be L1；
And 4, step 4: calculating the elongation A after fracture of the titanium alloy welding strip through a formula (1), evaluating the plasticity of the titanium alloy welding strip through the elongation A after fracture,
in the formula:
a-elongation after break (%),
L1-the spacing (mm) of two marked locations of the solder strip;
and 5: calculating the tensile strength R of the titanium alloy welding strip by the formula (2)S
In the formula:
RS-the tensile strength (MPa) of the solder strip,
s-effective area of welding strip (mm)2)，
H-gap length (mm)
B-width of the welding strip (mm),
delta-weld strip thickness (mm).
When B/delta is less than or equal to 5, the gap length H is 2.5mm, and when B/delta is more than 5, the gap length H is 1.0 mm.
This embodiment is long through the wire cut intercepting 200mm, and δ is 1mm thick, and width B is 40 mm's titanium alloy solder strip two, guarantees simultaneously that in the cutting process, any deformation does not take place for the titanium strip, and the both ends position of titanium alloy should be level and neat. Two V-shaped notches are symmetrically processed at the end parts of the two titanium belts at the central positions, namely the 100mm length positions, of the two titanium belts so as to ensure that the titanium alloy titanium belt to be measured is broken at the notch positions in the stretching process.
Two titanium alloy solder strips were marked at 5mm positions around the 100mm center position before the tensile test. And (4) loading the processed titanium alloy solder strip to be tested into a testing device for testing. After stretching, the sample is tightly closed, and the distance L between the two marked positions is adjusted1The measurement was performed, and the plasticity was measured by the formula (1). The stress-strain curves of the two titanium alloy welding strips are shown in figures 3 and 4.
The calculation results of the elongation after fracture of the two titanium alloy welding strips are respectively as follows:
the plasticity index of the titanium alloy welding strip is represented by elongation A after fracture.
The ratio of the width B of the titanium alloy welding strip to the thickness delta of the titanium alloy welding strip is as follows:
as B/delta is larger than 5, the H value is selected to be 1.0mm, the H value is substituted into the formula (2), the tensile strength of the two welding strips is calculated respectively, and the calculation results are respectively as follows:
thereby obtaining the tensile strength indexes of the two welding strips.
The embodiment is a titanium alloy welds area intensity and plastic testing arrangement, it includes protective housing 1, crossbeam 2, stretching mechanism, weld area anchor clamps 4 and actuating mechanism 6, the upper portion and the lower part of protective housing 1 inboard are connected with crossbeam 2 respectively, stretching mechanism includes two tensile poles, two tensile poles pass the upper and lower both ends of protective housing 1 respectively and link to each other with crossbeam 2 that is located protective housing 1 upper portion and lower part respectively, the one end of two tensile poles is provided with welds area anchor clamps 4, two weld and take anchor clamps 4 to set up relatively, two weld and take anchor clamps 4 to press from both sides the both ends of tightly welding area 5 respectively, the other end of tensile pole links to each other with actuating mechanism 6, remove along vertical direction through actuating mechanism 6 drive tensile pole, tensile pole drives and welds area anchor clamps 4 and remove to opposite direction, thereby realize welding the tensile of area 5, test welding area intensity and plasticity. And calculating the strain value of the welding strip 5 in the stretching process through the displacement value of the stretching rod.
The stretching rod is a screw rod 3, the screw rod 3 is in threaded connection with the protective shell 1 and the cross beam 2, the driving mechanism 6 is a motor, the screw rod 3 is driven to rotate through the motor, the welding strip clamp 4 is driven to move in the opposite direction through rotation of the screw rod, therefore, stretching of the welding strip 5 is achieved, and the strain value of the welding strip 5 in the stretching process is calculated through the displacement value of the screw rod 3.
The stretching rod is of a polished rod structure, the polished rod is in sliding connection with the protective shell 1 and the cross beam 2, the driving mechanism 6 is a hydraulic cylinder, and the polished rod is driven to stretch along the vertical direction through the stretching of the hydraulic cylinder, so that the stretching of the welding strip 5 is realized.
The welding strip clamp 4 is provided with patterns, is connected with the welding strip 5 through the patterns and is used for increasing the friction force of the titanium alloy welding strip 5 to be measured.
The number of the stretching mechanisms is two, and the two welding strips can be tested simultaneously.
The embodiments of the invention disclosed above are intended merely to aid in the explanation of the invention. The examples are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention.
Claims (10)
1. A method for testing the strength and the plasticity of a titanium alloy welding strip is characterized by comprising the following steps: it comprises the following steps:
step 1: cutting a certain length of the titanium alloy welding strip, processing two notches at the center of the welding strip in the length direction, symmetrically arranging the two notches along the width direction of the welding strip, and marking the positions 5mm away from the center of each notch;
step 2: installing the treated titanium alloy welding strip into a testing device, stretching the welding strip by the testing device until the welding strip is broken, recording a tensile stress displacement curve in the stretching process by a computer, and obtaining the maximum tensile force F of the welding stripnIn the unit of N;
and step 3: the broken solder strips are closed, and the distance between two mark positions is measured to be L1；
And 4, step 4: calculating the elongation A after fracture of the titanium alloy welding strip through a formula (1), evaluating the plasticity of the titanium alloy welding strip through the elongation A after fracture,
in the formula:
a-elongation after fracture (%),
L1-the spacing (mm) of the two marked locations of the solder strip;
and 5: calculating the tensile strength R of the titanium alloy welding strip by the formula (2)S
In the formula:
RS-the tensile strength (MPa) of the solder strip,
s-effective area of welding strip (mm)2)，
H-gap length (mm)
B-width of the welding strip (mm),
delta-weld strip thickness (mm).
2. The method for testing the strength and the plasticity of the titanium alloy welding strip according to claim 1, wherein the method comprises the following steps: the length of the titanium alloy welding strip is 200 mm.
3. The method for testing the strength and the plasticity of the titanium alloy welding strip according to claim 1, wherein the method comprises the following steps: the notch in the step 1 is of a V-shaped structure.
4. The method for testing the strength and the plasticity of the titanium alloy welding strip according to claim 3, wherein the method comprises the following steps: the single-side angle of the V-shaped notch is 20 degrees.
5. The method for testing the strength and the plasticity of the titanium alloy welding strip according to any one of claims 1 to 4, wherein the method comprises the following steps: when B/delta is less than or equal to 5, the gap length H is 2.5mm, and when B/delta is more than 5, the gap length H is 1.0 mm.
6. The method for testing the strength and the plasticity of the titanium alloy welding strip according to claim 5, wherein the method comprises the following steps: the test method simultaneously measures two solder strips.
7. The utility model provides a testing arrangement of titanium alloy solder strip intensity and plasticity which characterized in that: it includes protective housing (1), crossbeam (2), tension mechanism, welds and takes anchor clamps (4) and actuating mechanism (6), the upper portion and the lower part of protective housing (1) inboard are connected with crossbeam (2) respectively, tension mechanism includes two tensile poles, and two tensile poles pass the upper and lower both ends of protective housing (1) respectively and link to each other with crossbeam (2) that are located protective housing (1) upper portion and lower part respectively, the one end of two tensile poles is provided with welds and takes anchor clamps (4), and two weld and take anchor clamps (4) to set up relatively, and two weld and take anchor clamps (4) to press from both sides the both ends of welding area (5) respectively, the other end of tensile pole links to each other with actuating mechanism (6), moves along vertical direction through actuating mechanism (6) drive tensile pole.
8. The device for testing the strength and the plasticity of the titanium alloy welding strip according to claim 7, wherein: the stretching rod is a screw rod (3), the screw rod (3) is in threaded connection with the protective shell (1) and the cross beam (2), the driving mechanism (6) is a motor, and the screw rod (3) is driven to rotate through the motor.
9. The device for testing the strength and the plasticity of the titanium alloy welding strip according to claim 7, wherein: the welding strip fixture (4) is provided with patterns, and is connected with the welding strip (5) through the patterns.
10. The device for testing the strength and the plasticity of the titanium alloy welding strip according to claim 7, wherein: the number of the stretching mechanisms is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210120922.0A CN114544359A (en) | 2022-02-09 | 2022-02-09 | Method and device for testing strength and plasticity of titanium alloy welding strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210120922.0A CN114544359A (en) | 2022-02-09 | 2022-02-09 | Method and device for testing strength and plasticity of titanium alloy welding strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114544359A true CN114544359A (en) | 2022-05-27 |
Family
ID=81674413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210120922.0A Pending CN114544359A (en) | 2022-02-09 | 2022-02-09 | Method and device for testing strength and plasticity of titanium alloy welding strip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114544359A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929897A (en) * | 2009-06-18 | 2010-12-29 | 宝理塑料株式会社 | The method of the stress-strain curve of local stress measuring method, derivation resin material and the life-span prediction method of resin forming product |
| CN104406854A (en) * | 2014-12-10 | 2015-03-11 | 美巢集团股份公司 | Device and method for measuring viscoplasticity tensile strength of slurry |
| CN105527163A (en) * | 2014-10-24 | 2016-04-27 | 中国石油化工股份有限公司 | Method for evaluating plastic pipe butt-fusion welding quality |
| CN110940600A (en) * | 2018-09-21 | 2020-03-31 | 宁波方太厨具有限公司 | Device and method for automatically measuring elongation at break of plastic |
| CN112697588A (en) * | 2020-12-15 | 2021-04-23 | 沈阳工业大学 | Cable protective sleeve elongation measuring device based on vision and using method |
| CN113588421A (en) * | 2021-08-04 | 2021-11-02 | 唐山钢铁集团有限责任公司 | Method for evaluating forming performance of sheared edge of metal plate |
-
2022
- 2022-02-09 CN CN202210120922.0A patent/CN114544359A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929897A (en) * | 2009-06-18 | 2010-12-29 | 宝理塑料株式会社 | The method of the stress-strain curve of local stress measuring method, derivation resin material and the life-span prediction method of resin forming product |
| CN105527163A (en) * | 2014-10-24 | 2016-04-27 | 中国石油化工股份有限公司 | Method for evaluating plastic pipe butt-fusion welding quality |
| CN104406854A (en) * | 2014-12-10 | 2015-03-11 | 美巢集团股份公司 | Device and method for measuring viscoplasticity tensile strength of slurry |
| CN110940600A (en) * | 2018-09-21 | 2020-03-31 | 宁波方太厨具有限公司 | Device and method for automatically measuring elongation at break of plastic |
| CN112697588A (en) * | 2020-12-15 | 2021-04-23 | 沈阳工业大学 | Cable protective sleeve elongation measuring device based on vision and using method |
| CN113588421A (en) * | 2021-08-04 | 2021-11-02 | 唐山钢铁集团有限责任公司 | Method for evaluating forming performance of sheared edge of metal plate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102197351B1 (en) | A jig assembly comprising bending jig, an apparatus for measuring bending tensile strength and a method for measuring bending tensile strength using the same | |
| CN108788610B (en) | Adjustable flat plate welding fixture | |
| CN217359377U (en) | Device for testing strength and plasticity of titanium alloy welding strip | |
| CN114544359A (en) | Method and device for testing strength and plasticity of titanium alloy welding strip | |
| JPWO2018088273A1 (en) | CTOD specimen manufacturing method and plastic strain adjustment jig | |
| CN109923395B (en) | Clamp assembly including bending clamp, and apparatus and method for measuring bending tensile strength using the same | |
| CN108426769B (en) | Mechanical property testing device for metal material miniature tensile sample | |
| US11747241B2 (en) | Method of testing longitudinal submerged arc welded pipe susceptibility through-thickness hydrogen cracking | |
| CN108918257A (en) | A kind of stretching clamp for Al and Al superalloy sheet microspecimen | |
| CN113588421A (en) | Method for evaluating forming performance of sheared edge of metal plate | |
| CN220289250U (en) | Tensile strength detection device of steel bar | |
| CN113405893A (en) | Special device for testing thickness performance of economic steel plate | |
| CN215217677U (en) | Heat exchanger control valve detection device | |
| Sang et al. | A plane strain tensile apparatus | |
| CN212722329U (en) | Fixed rail device suitable for magnetic Brinell hardness tester | |
| CN213209719U (en) | Fatigue test clamping device suitable for reinforcing bar mechanical joint | |
| CN218297824U (en) | Small-size heavy H-shaped steel Z-direction tensile test auxiliary device | |
| CN219348441U (en) | Zinc-plating electric welding net solder joint tensile clamp | |
| CN221007048U (en) | Shear test device for composite steel plate | |
| CN219915139U (en) | Quick test positioner after tensile test breaks | |
| CN220339895U (en) | Extensometer and geotechnical cloth test system | |
| CN219142466U (en) | Small-size thick plate-shaped tensile sample clamp | |
| CN210690232U (en) | Impact testing machine for shot bag | |
| CN114813319B (en) | Clamping device for miniature plate sample tensile test | |
| Do et al. | Effect of ageing on residual stresses in welded stainless steel cylinders |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220527 |
|
| RJ01 | Rejection of invention patent application after publication |