CN217359377U - Device for testing strength and plasticity of titanium alloy welding strip - Google Patents

Device for testing strength and plasticity of titanium alloy welding strip Download PDF

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Publication number
CN217359377U
CN217359377U CN202220262537.5U CN202220262537U CN217359377U CN 217359377 U CN217359377 U CN 217359377U CN 202220262537 U CN202220262537 U CN 202220262537U CN 217359377 U CN217359377 U CN 217359377U
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titanium alloy
welding strip
plasticity
testing
strength
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黄瑞生
方乃文
武鹏博
徐锴
龙伟民
尹立孟
张天理
邹吉鹏
王善林
曹浩
陈玉华
刘西洋
谢吉林
闫德俊
宋南
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Harbin Research Institute of Welding
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Harbin Research Institute of Welding
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Abstract

The utility model provides a titanium alloy welds area intensity and plastic testing arrangement belongs to welding material inspection technical field. The problem of current device can't measure the intensity and the plasticity index of titanium alloy solder strip is solved. It includes protective housing, crossbeam, tension mechanism, welds and takes anchor clamps and actuating mechanism, the inboard upper portion of protective housing and lower part are connected with the crossbeam respectively, tension mechanism includes two tensile poles, and two tensile poles pass the upper and lower both ends of protective housing respectively and link to each other with the crossbeam that is located protective housing upper portion and lower part respectively, the one end of two tensile poles is provided with welds and takes anchor clamps, and two weld and take anchor clamps to set up relatively, and two weld and take anchor clamps to press from both sides the both ends of tightly welding the area respectively, the other end of tensile pole links to each other with actuating mechanism, moves along vertical direction through the tensile pole of actuating mechanism drive. The method is mainly used for testing the strength and the plasticity of the titanium alloy welding strip.

Description

Device for testing strength and plasticity of titanium alloy welding strip
Technical Field
The utility model belongs to the technical field of the welding material inspection, especially, relate to a titanium alloy welds test device of taking intensity and plasticity.
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 characteristic of non-magnetism. 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 because of high deposition 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 deposited 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.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a titanium alloy welds area intensity and plastic testing arrangement to solve the unable intensity and the plasticity index of welding the area to the titanium alloy of current device and carry out measuring problem.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a titanium alloy welds takes intensity and plastic testing arrangement, it includes protective housing, crossbeam, tension mechanism, welds and takes anchor clamps and actuating mechanism, the upper portion and the lower part of protective housing inboard are connected with the crossbeam respectively, tension mechanism includes two tensile poles, and two tensile poles pass the upper and lower both ends of protective housing respectively and link to each other with the crossbeam that is located protective housing upper portion and lower part respectively, the one end of two tensile poles is provided with welds and takes anchor clamps, and two weld and take anchor clamps to set up relatively, and two weld and take anchor clamps to press from both sides the both ends of tightly welding the area respectively, the other end of tensile pole links to each other with actuating mechanism, and the tensile pole of drive through actuating mechanism moves along vertical direction.
Furthermore, the stretching rod is a screw rod, and the screw rod is in threaded connection with the protective shell and the cross beam.
Furthermore, the driving mechanism is a motor, and the screw rod is driven to rotate by the motor.
Furthermore, the stretching rod is of a polished rod structure, and the polished rod is connected with the protective shell and the cross beam in a sliding mode.
Further, the driving mechanism is a hydraulic cylinder.
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 beneficial effects of the utility model are that: the utility model discloses can weld intensity and the plasticity index of taking to the titanium alloy and measure, the centre gripping is stable, easy operation, can accord with the test requirement that the area was welded to the titanium alloy. The strength and plasticity indexes of the titanium alloy welding strip can be accurately obtained, and technical guarantee is provided for titanium alloy surfacing repair and preparation of the titanium alloy flux-cored wire.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a schematic view of a structure of a device for testing the strength and plasticity of a titanium alloy welding strip according to the present invention;
fig. 2 is a schematic view of a three-dimensional structure of a testing device for strength and plasticity of a titanium alloy welding strip.
FIG. 3 is a schematic view of a front view of the treated titanium alloy welding strip of the present invention;
FIG. 4 is a schematic side view of the treated titanium alloy weld zone of the present invention;
fig. 5 is a stress-strain curve of a first titanium alloy weld strip according to the embodiment of the present invention;
fig. 6 is a second titanium alloy weld strip stress-strain plot according to an embodiment of the present invention;
1-protective shell, 2-beam, 3-screw, 4-welding strip clamp, 5-welding strip and 6-motor.
2 detailed description of the invention
The technical solution in the embodiment of the present invention will be clearly and completely explained below with reference to the drawings in the embodiment 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 to illustrate the embodiment, a device for testing the strength and plasticity of a titanium alloy welding strip comprises a protective shell 1, a cross beam 2, a stretching mechanism, welding strip clamps 4 and a driving mechanism 6, wherein the cross beam 2 is respectively connected to the upper part and the lower part of the inner side of the protective shell 1, 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 1 and are respectively connected with the cross beam 2 positioned at the upper part and the lower part of the protective shell 1, the welding strip clamps 4 are arranged at one end of the two stretching rods, the two welding strip clamps 4 are oppositely arranged, the two welding strip clamps 4 respectively clamp two ends of a welding strip 5, the other end of the stretching rod is connected with the driving mechanism 6, the driving mechanism 6 drives the stretching rod to move along the vertical direction, and the stretching rod drives the welding strip clamp 4 to move in the opposite direction, so that the welding strip 5 is stretched, and the strength and the plasticity of the welding strip are tested. 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 test method comprises the following steps:
step 1: cutting a certain length of the titanium alloy welding strip, and cutting by any method, wherein 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 formed in the center of the welding strip in the length direction and are symmetrically arranged in the width direction of the welding strip, and the positions 5mm away from the center of each notch are marked;
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 stretching force and the displacement curve in the stretching process by a computer to obtain the maximum stretching force F of the welding strip n In the unit of N;
and step 3: the broken solder strips are closed, and the distance between two mark positions is measured to be L 1 ；
And 4, step 4: calculating the elongation A after fracture of the titanium alloy welding strip by a formula (1), measuring the plasticity of the titanium alloy welding strip by the elongation A after fracture,
Figure BDA0003498574330000041
in the formula:
a-elongation after break (%),
L 1 -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
Figure BDA0003498574330000042
In the formula:
R S -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 leaned, and then the distance L between the two marked positions is measured 1 The 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:
Figure BDA0003498574330000051
Figure BDA0003498574330000052
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:
Figure BDA0003498574330000053
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:
Figure BDA0003498574330000054
Figure BDA0003498574330000055
thereby obtaining the tensile strength indexes of the two welding strips.
The embodiment of the present invention disclosed above is only used to help illustrate the present 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 its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention.

Claims (7)

1. 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 that tightly weld 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.
2. The device for testing the strength and the plasticity of the titanium alloy welding strip according to claim 1, wherein: the stretching rod is a screw rod (3), and the screw rod (3) is in threaded connection with the protective shell (1) and the cross beam (2).
3. The device for testing the strength and the plasticity of the titanium alloy welding strip according to claim 2, wherein: the driving mechanism (6) is a motor, and the screw rod (3) is driven to rotate by the motor.
4. The device for testing the strength and the plasticity of the titanium alloy welding strip according to claim 1, wherein: the stretching rod is of a polished rod structure, and the polished rod is connected with the protective shell (1) and the cross beam (2) in a sliding mode.
5. The device for testing the strength and the plasticity of the titanium alloy welding strip according to claim 4, wherein: the driving mechanism (6) is a hydraulic cylinder.
6. The device for testing the strength and the plasticity of the titanium alloy welding strip according to claim 1, wherein: the welding strip clamp (4) is provided with patterns and is connected with the welding strip (5) through the patterns.
7. The device for testing the strength and the plasticity of the titanium alloy welding strip according to claim 1, wherein: the number of the stretching mechanisms is two.
CN202220262537.5U 2022-02-09 2022-02-09 Device for testing strength and plasticity of titanium alloy welding strip Active CN217359377U (en)

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