CN104568244A - Cutting method for detecting transverse residual stress of steel rail - Google Patents
Cutting method for detecting transverse residual stress of steel rail Download PDFInfo
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- CN104568244A CN104568244A CN201410826665.8A CN201410826665A CN104568244A CN 104568244 A CN104568244 A CN 104568244A CN 201410826665 A CN201410826665 A CN 201410826665A CN 104568244 A CN104568244 A CN 104568244A
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- Prior art keywords
- residual stress
- steel rail
- cutting method
- rail
- detection piece
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to a cutting method for detecting transverse residual stress of a steel rail. The cutting method is characterized in that a steel rail section which is 500 mm long is cut out from one end of the to-be-detected steel rail to be used as a detection piece, and the detection piece is longitudinally cut off from the waist center of the detection part. The cutting method has the advantages as follows: the method is simple, the cutting position and the cutting direction are selected reasonably, and the transverse residual stress of the steel rail can be detected quickly and accurately.
Description
Technical field
The present invention relates to a kind of cutting method detecting rail horizontal residual stress, belong to detection technique field.
Background technology
What unrelieved stress physical test method adopted has: x-ray method, method of magnetic, brittle coating method, optical method, acoustic method, electric resistance strain film method, wherein electric resistance strain film method is a kind of method of relatively generally acknowledging both at home and abroad, the residual stress test of rail longitudinal direction, current employing strain gauge method, performs European EN13674-1 standard.
EN European standard only proposes detection method to the meridional stress of rail, and does not propose the method for testing of transverse stress; In U.S. AREMA standard, test unrelieved stress, be in fact exactly the horizontal residual stress measuring rail, but its actual computing method, use vernier caliper measurement data, compare its openings of sizes, judge qualified and defective.The strain gauge method that is out of use carries out the report of rail horizontal residual stress test.
Adopt electric resistance strain film method (paster method) to detect rail horizontal residual stress, need counter stress to discharge, how to cut tested rail and cut direction is the key detected, the selection of cutting position seems particularly important.
Summary of the invention
The object of the invention is, in order to fast, accurately rail horizontal residual stress can be detected, to provide a kind of cutting method detecting rail horizontal residual stress.
Technical scheme of the present invention is as follows:
Intercept the rail section of long 500mm from rail one end to be detected as detection piece, in the waist centre of detection piece, longitudinally detection piece cuts off by (length direction).
Advantage of the present invention is: method is simple, and cutting position and set direction rationally, can detect the horizontal residual stress of rail fast and accurately.
Embodiment
Intercept the rail section of long 500mm from rail one end to be detected as detection piece, with foil gauge, after measuring detection piece unrelieved stress initial value, protect foil gauge with medical proof fabric, in the waist centre of detection piece, longitudinally detection piece is cut off.
Because the stress surveyed is horizontal residual stress, so cut direction is detection piece length direction, make detection piece when not fettering, release stress, rail longitudinal stress situation could be measured truly, cut direction is incorrect, and the stress value measured is not meridional stress value, or does not measure result or data are inaccurate.
Claims (1)
1. detect a cutting method for rail horizontal residual stress, it is characterized in that: intercept the rail section of long 500mm from rail one end to be detected as detection piece, in the waist centre of detection piece, longitudinally detection piece is cut off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410826665.8A CN104568244A (en) | 2014-12-26 | 2014-12-26 | Cutting method for detecting transverse residual stress of steel rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410826665.8A CN104568244A (en) | 2014-12-26 | 2014-12-26 | Cutting method for detecting transverse residual stress of steel rail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104568244A true CN104568244A (en) | 2015-04-29 |
Family
ID=53084832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410826665.8A Pending CN104568244A (en) | 2014-12-26 | 2014-12-26 | Cutting method for detecting transverse residual stress of steel rail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104568244A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6244637A (en) * | 1985-08-22 | 1987-02-26 | Mitsubishi Heavy Ind Ltd | Measuring method for residual stress |
| CN103234666A (en) * | 2013-04-26 | 2013-08-07 | 内蒙古包钢钢联股份有限公司 | Method for testing residual stress of steel rail |
| CN104142194A (en) * | 2014-06-25 | 2014-11-12 | 西南交通大学 | Method for monitoring longitudinal force of seamless rail symmetrically and precisely based on bidirectional strain method |
-
2014
- 2014-12-26 CN CN201410826665.8A patent/CN104568244A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6244637A (en) * | 1985-08-22 | 1987-02-26 | Mitsubishi Heavy Ind Ltd | Measuring method for residual stress |
| CN103234666A (en) * | 2013-04-26 | 2013-08-07 | 内蒙古包钢钢联股份有限公司 | Method for testing residual stress of steel rail |
| CN104142194A (en) * | 2014-06-25 | 2014-11-12 | 西南交通大学 | Method for monitoring longitudinal force of seamless rail symmetrically and precisely based on bidirectional strain method |
Non-Patent Citations (4)
| Title |
|---|
| 安天生: "钢轨轨腰水平脆断敏感性评定", 《铁道学报》 * |
| 张祖光: "钢轨残余应力研究", 《钢铁》 * |
| 祝洪川等: "重轨残余应力检测的全释放法和释放法的比较", 《钢铁研究》 * |
| 詹新伟等: "热轧钢轨中残余应力的测试与分析", 《铁道技术监督》 * |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150429 |