CN111060367A - Aluminum alloy conductor stress relaxation evaluation method - Google Patents
Aluminum alloy conductor stress relaxation evaluation method Download PDFInfo
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- CN111060367A CN111060367A CN201911309367.0A CN201911309367A CN111060367A CN 111060367 A CN111060367 A CN 111060367A CN 201911309367 A CN201911309367 A CN 201911309367A CN 111060367 A CN111060367 A CN 111060367A
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- 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
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- 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
- G01N1/32—Polishing; Etching
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- 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
- G01N1/44—Sample treatment involving radiation, e.g. heat
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- 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
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- 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
- G01N2001/2866—Grinding or homogeneising
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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Abstract
The invention relates to an aluminum alloy wire stress relaxation evaluation method, which sequentially comprises the following steps: preparing a stress relaxation sample, heating the stress relaxation sample, and performing a stress relaxation test; the invention has the advantages that: through polishing, polishing the stress relaxation sample of preparing to step one, can effectually solve the stress relaxation process fracture in clamping position, improved experimental reliability, secondly, step two is stress relaxation sample heat treatment to keep warm 10min, can ensure the homogeneity of whole stress relaxation sample temperature, with the stress relaxation performance of aluminum alloy wire under the quick different temperatures that obtains, through practice testifying: the aluminum alloy wire has small stress relaxation degree within the experiment temperature range (room temperature-200 ℃), the stress relaxation test is carried out by setting the initial strain in the third step, and the measurement precision is high because the strain gauge is used for measuring the initial strain, thereby providing a theoretical basis for the design and application of the aluminum alloy wire.
Description
Technical Field
The invention relates to an aluminum alloy wire stress relaxation evaluation method.
Background
Metal wires have important application in the power industry, and particularly, in recent years, various novel energy-saving wires such as steel-cored high-conductivity duralumin strands, aluminum alloy-cored aluminum strands, medium-strength all-aluminum alloy strands and the like are widely concerned by people. The tensile property is an important index for evaluating the aluminum alloy conductor, but the stress relaxation property of the aluminum alloy conductor is not considered, whether the aluminum alloy conductor has stress relaxation or not in the actual use process, and if so, an operator cannot know how much the relaxation degree can reach.
Disclosure of Invention
The invention aims to provide an aluminum alloy wire stress relaxation evaluation method, which can more easily simulate the use temperature of an aluminum alloy wire under laboratory conditions, so as to obtain the stress relaxation performance of the aluminum alloy wire under different use temperatures.
In order to solve the technical problems, the invention is realized by the following technical scheme: an aluminum alloy wire stress relaxation evaluation method sequentially comprises the following steps:
the method comprises the following steps: preparing an aluminum alloy wire into a stress relaxation sample, and polishing the stress relaxation sample;
step two: heating the stress relaxation sample prepared in the step one, and preserving heat for 10 min;
step three: and setting initial strain and carrying out a stress relaxation test on the stress relaxation sample treated in the step two to obtain a stress relaxation curve.
Preferably, the stress relaxation sample in step one is prepared by wire cutting.
Preferably, the stress relaxation sample in the step one is subjected to a grinding and polishing treatment by using sandpaper.
Preferably, the stress relaxation sample in the second step is subjected to a heating treatment by an environmental chamber.
Preferably, the length C of the middle parallel section of the stress relaxation sample in the first step is equal to 20mm, the width b of the middle parallel section of the stress relaxation sample is equal to 1.8mm, the length L of the stress relaxation sample in the first step is equal to 60mm, and the width W of the end part of the stress relaxation sample is equal to 3.86 mm.
In conclusion, the invention has the advantages that: through polishing, polishing the stress relaxation sample of preparing to step one, can effectually solve the stress relaxation process fracture in clamping position, improved experimental reliability, secondly, step two is stress relaxation sample heat treatment to keep warm 10min, can ensure the homogeneity of whole stress relaxation sample temperature, with the stress relaxation performance of aluminum alloy wire under the quick different temperatures that obtains, through practice testifying: the aluminum alloy wire has small stress relaxation degree within the experiment temperature range (room temperature-200 ℃), the stress relaxation test is carried out by setting the initial strain in the third step, and the measurement precision is high because the strain gauge is used for measuring the initial strain, thereby providing a theoretical basis for the design and application of the aluminum alloy wire.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic structural diagram of an aluminum alloy conductor stress relaxation evaluation method of the present invention;
FIG. 2 is a stress relaxation curve according to a first embodiment of the present invention;
FIG. 3 is a stress relaxation curve of a second embodiment of the present invention;
fig. 4 is a stress relaxation curve of a third embodiment of the present invention.
Detailed Description
An aluminum alloy wire stress relaxation evaluation method sequentially comprises the following steps:
the method comprises the following steps: preparing an aluminum alloy wire into a stress relaxation sample, and polishing the stress relaxation sample;
step two: heating the stress relaxation sample prepared in the step one, and preserving heat for 10 min;
step three: and setting initial strain and carrying out a stress relaxation test on the stress relaxation sample treated in the step two to obtain a stress relaxation curve.
Through polishing, polishing the stress relaxation sample of preparing to step one, can effectually solve the stress relaxation process fracture in clamping position, improved experimental reliability, secondly, step two is stress relaxation sample heat treatment to keep warm 10min, can ensure the homogeneity of whole stress relaxation sample temperature, with the stress relaxation performance of aluminum alloy wire under the quick different temperatures that obtains, through practice testifying: the aluminum alloy wire has small stress relaxation degree within the experiment temperature range (room temperature-200 ℃), the stress relaxation test is carried out by setting the initial strain in the third step, and the measurement precision is high because the strain gauge is used for measuring the initial strain, thereby providing a theoretical basis for the design and application of the aluminum alloy wire.
The stress relaxation sample is prepared by wire cutting in the first step, the processing precision is high, the flatness of the tensile sample can be ensured, the polishing is facilitated, the stress relaxation sample is polished by abrasive paper in the first step, the abrasive paper processing effect is good, the operation is simple, the stress relaxation sample is heated by an environment box in the second step, the environment box is the prior art, the embodiment is not described in detail, the tensile sample is heated by the environment box, the environment temperature can be introduced in the heating process, the mechanical property of the aluminum alloy wire can be better evaluated, as shown in figure 1, the length C of the middle parallel section of the stress relaxation sample in the first step is equal to 20mm, the width b of the middle parallel section of the stress relaxation sample is equal to 1.8mm, the length L of the stress relaxation sample in the first step is equal to 60mm, and the width W of the end part of the stress relaxation sample is equal to 3.86mm, the clamping quality of the stress relaxation sample can be improved.
The first embodiment is as follows:
an aluminum alloy wire stress relaxation evaluation method sequentially comprises the following steps:
the method comprises the following steps: preparing an aluminum alloy wire into a stress relaxation sample, and polishing the stress relaxation sample;
step two: heating the stress relaxation sample prepared in the step one to 50 ℃, and preserving heat for 10 min;
step three: setting initial strain and performing a stress relaxation test on the stress relaxation sample treated in the second step to obtain a stress relaxation curve as shown in fig. 2.
Example two:
an aluminum alloy wire stress relaxation evaluation method sequentially comprises the following steps:
the method comprises the following steps: preparing an aluminum alloy wire into a stress relaxation sample, and polishing the stress relaxation sample;
step two: heating the stress relaxation sample prepared in the step one to 100 ℃, and preserving heat for 10 min;
step three: setting initial strain and performing a stress relaxation test on the stress relaxation sample treated in the second step to obtain a stress relaxation curve as shown in fig. 3.
Example three:
an aluminum alloy wire stress relaxation evaluation method sequentially comprises the following steps:
the method comprises the following steps: preparing an aluminum alloy wire into a stress relaxation sample, and polishing the stress relaxation sample;
step two: heating the stress relaxation sample prepared in the step one to 150 ℃, and preserving heat for 10 min;
step three: setting initial strain and performing a stress relaxation test on the stress relaxation sample treated in the second step to obtain a stress relaxation curve as shown in fig. 4.
Other embodiments of the present invention than the preferred embodiments described above will be apparent to those skilled in the art from the present invention, and various changes and modifications can be made therein without departing from the spirit of the present invention as defined in the appended claims.
Claims (5)
1. An aluminum alloy wire stress relaxation evaluation method is characterized in that: the method sequentially comprises the following steps:
the method comprises the following steps: preparing an aluminum alloy wire into a stress relaxation sample, and polishing the stress relaxation sample;
step two: heating the stress relaxation sample prepared in the step one, and preserving heat for 10 min;
step three: and setting initial strain and carrying out a stress relaxation test on the stress relaxation sample treated in the step two to obtain a stress relaxation curve.
2. The aluminum alloy wire stress relaxation evaluation method according to claim 1, characterized in that: and step one, the stress relaxation sample is prepared by wire cutting.
3. The aluminum alloy wire stress relaxation evaluation method according to claim 1, characterized in that: and in the step one, the stress relaxation sample is polished and polished by sand paper.
4. The aluminum alloy wire stress relaxation evaluation method according to claim 1, characterized in that: and in the second step, the stress relaxation sample is heated through an environment box.
5. The aluminum alloy wire stress relaxation evaluation method according to claim 1, characterized in that: the length C of the middle parallel section of the stress relaxation sample in the first step is equal to 20mm, the width b of the middle parallel section of the stress relaxation sample is equal to 1.8mm, the length L of the stress relaxation sample in the first step is equal to 60mm, and the width W of the end part of the stress relaxation sample is equal to 3.86 mm.
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| CN201911309367.0A CN111060367A (en) | 2019-12-18 | 2019-12-18 | Aluminum alloy conductor stress relaxation evaluation method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095637A (en) * | 2010-11-12 | 2011-06-15 | 中国建筑材料检验认证中心有限公司 | Method for assessing elastic modulus and strength of circular or circular-tube brittle material |
| CN102445401A (en) * | 2011-10-20 | 2012-05-09 | 新兴铸管股份有限公司 | Method for quickly testing alternating thermal stress resistance of metal |
| CN105388101A (en) * | 2015-12-02 | 2016-03-09 | 中国石油天然气集团公司 | Combined-loading stress corrosion testing apparatus and method |
-
2019
- 2019-12-18 CN CN201911309367.0A patent/CN111060367A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095637A (en) * | 2010-11-12 | 2011-06-15 | 中国建筑材料检验认证中心有限公司 | Method for assessing elastic modulus and strength of circular or circular-tube brittle material |
| CN102445401A (en) * | 2011-10-20 | 2012-05-09 | 新兴铸管股份有限公司 | Method for quickly testing alternating thermal stress resistance of metal |
| CN105388101A (en) * | 2015-12-02 | 2016-03-09 | 中国石油天然气集团公司 | Combined-loading stress corrosion testing apparatus and method |
Non-Patent Citations (1)
| Title |
|---|
| 张勇: "GH4169 高温低周疲劳和蠕变疲劳交互行为研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》 * |
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Application publication date: 20200424 |