CN104596684A - Transverse residual stress detection method for steel rail - Google Patents
Transverse residual stress detection method for steel rail Download PDFInfo
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- CN104596684A CN104596684A CN201410825996.XA CN201410825996A CN104596684A CN 104596684 A CN104596684 A CN 104596684A CN 201410825996 A CN201410825996 A CN 201410825996A CN 104596684 A CN104596684 A CN 104596684A
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- detection piece
- residual stress
- steel rail
- rail
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to a transverse residual stress detection method for a steel rail. The transverse residual stress detection method for the steel rail includes that cutting a steel rail section with 500 millimeters in length from one end of the steel rail to be detected, using the steel rail section as a detection piece, using a central point of one side of the rail waist of the detection piece as a symmetrical point, selecting two points away from the central point in 10 millimeters from the two sides of the central point in the direction vertical to the axial line of the detection piece, using the two points as patch positions, bonding a strain gauge at each patch position, measuring an initial value, and resetting an apparatus, wherein the length direction of each strain gauge is vertical to the axial line of the detection piece; using a molybdenum wire cut method to cut off the detection piece along the longitudinal direction at the center of the waist of the detection piece, measuring a final residual stress value, and calculating to obtain an average value-the transverse residual stress value of the steel rail. The transverse residual stress detection method for the steel rail has advantages that the method is simple, the patch position and cutting position selection is reasonable, and the transverse residual stress of the steel rail can be detected quickly and precisely.
Description
Technical field
The present invention relates to a kind of detection method of 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.
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 detection method of rail horizontal residual stress.
Technical scheme of the present invention is as follows:
The rail section of long 500mm is intercepted as detection piece from rail one end to be detected, with the central point of the web of the rail side of detection piece for symmetric points, on the direction perpendicular to detection piece axis, distance center point both sides 10mm respectively selects a bit as patch location, paste a slice foil gauge respectively, the length direction of foil gauge and detection piece axes normal, measure initial value, instrument resets; Use molybdenum filament wire cutting method, in the waist centre of detection piece, longitudinally detection piece cuts off by (length direction), then surveys unrelieved stress final value, calculates the horizontal residual stress value that mean value is rail.
Advantage of the present invention is: method is simple, and patch location and cutting position are selected rationally, to detect the horizontal residual stress of rail fast and accurately.
Embodiment
The rail section of long 500mm is intercepted as detection piece from rail one end to be detected, with the central point of the web of the rail side of detection piece for symmetric points, on the direction perpendicular to detection piece axis, distance center point both sides 10mm respectively selects a bit as patch location, paste a slice foil gauge respectively, foil gauge specification 3mm × 3mm, model BX-120-3AA, the length direction of foil gauge and detection piece axes normal, measure initial value, instrument resets; Use molybdenum filament wire cutting method, in the waist centre of detection piece, longitudinally detection piece is cut off, then survey unrelieved stress final value, calculate the horizontal residual stress value that mean value is rail.
At present, outlet rail quantity gets more and more, and has requirement to detect horizontal residual stress buyer and also gets more and more, provide a kind of horizontal residual stress method of testing rail to be very important.Because rail waist unrelieved stress is bigger than normal, rail will certainly be caused not ftracture from web of the rail portion, particularly new steel grade, as K1250 rail.
Claims (1)
1. the detection method of a 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, with the central point of the web of the rail side of detection piece for symmetric points, on the direction perpendicular to detection piece axis, distance center point both sides 10mm respectively selects a bit as patch location, paste a slice foil gauge respectively, the length direction of foil gauge and detection piece axes normal, measure initial value, and instrument resets; Use molybdenum filament wire cutting method, in the waist centre of detection piece, longitudinally detection piece is cut off, then survey unrelieved stress final value, calculate the horizontal residual stress value that mean value is rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410825996.XA CN104596684A (en) | 2014-12-26 | 2014-12-26 | Transverse residual stress detection method for steel rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410825996.XA CN104596684A (en) | 2014-12-26 | 2014-12-26 | Transverse residual stress detection method for steel rail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104596684A true CN104596684A (en) | 2015-05-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410825996.XA Pending CN104596684A (en) | 2014-12-26 | 2014-12-26 | Transverse residual stress detection method for steel rail |
Country Status (1)
| Country | Link |
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| CN (1) | CN104596684A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105371996A (en) * | 2015-10-16 | 2016-03-02 | 上海应用技术学院 | Method for measuring residual stress generated by metallic material pressure processing |
| CN107202655A (en) * | 2017-05-27 | 2017-09-26 | 内蒙古包钢钢联股份有限公司 | The test method of heat-treated rail residual stress |
| CN113670810A (en) * | 2021-07-22 | 2021-11-19 | 包头钢铁（集团）有限责任公司 | Test method for testing residual stress of H-shaped steel by adopting linear cutting |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1263258A (en) * | 1999-02-09 | 2000-08-16 | 中国科学院金属研究所 | Determination method of residual stress |
| KR20070028982A (en) * | 2005-09-08 | 2007-03-13 | (주)미래아이에스이 | Stress measuring method for a building |
| 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 |
-
2014
- 2014-12-26 CN CN201410825996.XA patent/CN104596684A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1263258A (en) * | 1999-02-09 | 2000-08-16 | 中国科学院金属研究所 | Determination method of residual stress |
| KR20070028982A (en) * | 2005-09-08 | 2007-03-13 | (주)미래아이에스이 | Stress measuring method for a building |
| 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 |
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》 * |
| 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》 * |
| 穆恩生等: "AP1钢轨三维残余应力测量及分析", 《中国铁道科学》 * |
| 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》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105371996A (en) * | 2015-10-16 | 2016-03-02 | 上海应用技术学院 | Method for measuring residual stress generated by metallic material pressure processing |
| CN107202655A (en) * | 2017-05-27 | 2017-09-26 | 内蒙古包钢钢联股份有限公司 | The test method of heat-treated rail residual stress |
| CN113670810A (en) * | 2021-07-22 | 2021-11-19 | 包头钢铁（集团）有限责任公司 | Test method for testing residual stress of H-shaped steel by adopting linear cutting |
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Application publication date: 20150506 |