CN109374178A - A kind of seamless steel pipe axial direction residual stress detection method - Google Patents
A kind of seamless steel pipe axial direction residual stress detection method Download PDFInfo
- Publication number
- CN109374178A CN109374178A CN201811318715.6A CN201811318715A CN109374178A CN 109374178 A CN109374178 A CN 109374178A CN 201811318715 A CN201811318715 A CN 201811318715A CN 109374178 A CN109374178 A CN 109374178A
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- CN
- China
- Prior art keywords
- steel pipe
- seamless steel
- residual stress
- foil gauge
- piece
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- 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.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0047—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to residual stresses
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of seamless steel pipe axial direction residual stress detection methods, the seamless steel pipe of long 700mm is intercepted as detection piece from seamless steel pipe one end to be detected, in detection piece away from the position 350mm of end pasting a piece of first foil gauge, again along the circumferential direction with the first foil gauge at pasting a piece of second foil gauge on the position of 180 degree, total patch two panels foil gauge, the length direction of two panels foil gauge is consistent with detection piece length direction, measures initial value, resets；In the centre of detection piece, 25mm is respectively measured to two sides, along the circumferential direction cuts the annulus that length is 50mm, measures axial residual stress final value, the average value of residual stress for calculating two test points is the axial residual-stress value of seamless steel pipe.The method of the present invention is simple, and patch location and cutting position selection rationally, can quickly and accurately measure the residual stress of detection piece.
Description
Technical field
The present invention relates to detection technique fields, more particularly to a kind of seamless steel pipe axial direction residual stress detection method.
Background technique
Residual stress refers to component in the fabrication process, will be by effect and influence from factors such as various techniques；When
After these factors disappear, if above-mentioned effect suffered by component cannot completely disappear therewith with influence, still there is partial action
Remain in component with influence, then this remaining effect is known as residual stress or residual stress with influence.
Metal material can all generate different residual in machining and hot-working (casting, weldment, forging) during
Residue stress.The presence of residual stress has great influence, the manufacture and heat treatment process of weldment to the mechanical property of material
In it is particularly evident.The presence of residual stress, one side workpiece can reduce intensity, and workpiece is made to be deformed and crack during fabrication
Defective workmanship；On the other hand it can make the mechanics such as fatigue strength, the stress corrosion of material during Spontaneous release after fabrication again
Reduced performance.To cause using the problems in.Therefore, the detection of residual stress is for heat treatment process, surface Hardening Treatment
Technique, the effect for eliminating stress technique and scrap diagnosis etc. all have very important significance.
Summary of the invention
The present invention provides a kind of seamless steel pipe axial direction residual stress detection methods, adopt the technical scheme that
A kind of seamless steel pipe axial direction residual stress detection method, it is characterised in that: cut from seamless steel pipe one end to be detected
Take the seamless steel pipe of long 700mm as detection piece, in detection piece away from pasting a piece of first foil gauge on the position 350mm of end, then
Along the circumferential direction amount to patch two panels foil gauge at a piece of second foil gauge is pasted on the position of 180 degree with the first foil gauge, two panels is answered
The length direction for becoming piece is consistent with detection piece length direction, measures initial value, resets；In the centre of detection piece, to two
Side respectively measures 25mm, along the circumferential direction cuts the annulus that length is 50mm, measures axial residual stress final value, calculates two tests
The average value of residual stress of point is the axial residual-stress value of seamless steel pipe.
The present invention has following the utility model has the advantages that method is simple, patch location and cutting position selection rationally, can quickly,
Accurately measure the residual stress of detection piece.
Specific embodiment
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.
A kind of seamless steel pipe axial direction residual stress detection method intercepts long 700mm's from seamless steel pipe one end to be detected
Seamless steel pipe is as detection piece, in detection piece away from pasting a piece of first foil gauge on the position 350mm of end, then along the circumferential direction with
First foil gauge amounts to patch two panels foil gauge, the length side of two panels foil gauge at a piece of second foil gauge is pasted on the position of 180 degree
To consistent with detection piece length direction, measurement initial value, clearing；In the centre of detection piece, 25mm is respectively measured to two sides,
The annulus that length is 50mm is along the circumferential direction cut, axial residual stress final value is measured, calculates the residual stress of two test points
Average value is the axial residual-stress value of seamless steel pipe.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (1)
1. a kind of seamless steel pipe axial direction residual stress detection method, it is characterised in that: intercepted from seamless steel pipe one end to be detected
The seamless steel pipe of long 700mm is as detection piece, in detection piece away from pasting a piece of first foil gauge, then edge on the position 350mm of end
Circumferencial direction and the first foil gauge amount to patch two panels foil gauge, two panels strain at a piece of second foil gauge is pasted on the position of 180 degree
The length direction of piece is consistent with detection piece length direction, measures initial value, resets；In the centre of detection piece, to two sides
25mm is respectively measured, the annulus that length is 50mm is along the circumferential direction cut, axial residual stress final value is measured, calculates two test points
Average value of residual stress be seamless steel pipe axial residual-stress value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811318715.6A CN109374178A (en) | 2018-11-07 | 2018-11-07 | A kind of seamless steel pipe axial direction residual stress detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811318715.6A CN109374178A (en) | 2018-11-07 | 2018-11-07 | A kind of seamless steel pipe axial direction residual stress detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109374178A true CN109374178A (en) | 2019-02-22 |
Family
ID=65383690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811318715.6A Withdrawn CN109374178A (en) | 2018-11-07 | 2018-11-07 | A kind of seamless steel pipe axial direction residual stress detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109374178A (en) |
-
2018
- 2018-11-07 CN CN201811318715.6A patent/CN109374178A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190222 |