CN103727974A - Sensor for integral detection of stress and retained austenite content of four-pin magnetic probe - Google Patents
Sensor for integral detection of stress and retained austenite content of four-pin magnetic probe Download PDFInfo
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- CN103727974A CN103727974A CN201210381152.1A CN201210381152A CN103727974A CN 103727974 A CN103727974 A CN 103727974A CN 201210381152 A CN201210381152 A CN 201210381152A CN 103727974 A CN103727974 A CN 103727974A
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Abstract
The invention relates to a sensor for integral detection of the stress and the retained austenite content of a four-pin magnetic probe. The sensor comprises four magnetic probing pins used for integral detection of the stress and the retained austenite content, two sets of coils for transmitting signals, a round base with an aviation plug combination part and a round through hole used for leading out a winding wire. The round base can be screwed on an aviation plug, magnetization signals and detection signals of a coil winding wire led out of the round through hole can form a relation curve, and the relation curve can represent the residual stress or reflect the retained austenite content of ferromagnetic material. Through the sensor for integral detection of the stress and the retained austenite content of the four-pin magnetic probe, integral detection of the stress and the retained austenite is achieved, the test precision is high, the measurement difficulty is low, the detection period is short, and the test method is easy and convenient to operate and flexible. The sensor can reach any portion of a test object made of ferromagnetic material, the material can be measured without loss, and moreover the material can be tested in a layered mode.
Description
Technical field
The present invention relates to residual stress and the retained austenite of ferrimagnet, more specifically say a kind of stress of ferrimagnet and four pin magnetic probe sensors that residual austenite content one detects of being adapted to.
Background technology
Ferrimagnet all can produce different residual stresss in machining and hot worked process, and the existence of residual stress has very large impact to the mechanical property of material; Austenite is a kind of phase of iron, and another kind is common is martensite mutually; Retained austenite refers to and occurs after martensite transfor mation, also has a small amount of austenite that transformation does not occur;
A large amount of engineering practice confirms that residual stress is the principal element of the mechanical properties such as the fatigue strength that affects large bridge, large pressurized vessel, large-scale metal structure material, stress corrosion; Mechanical property, physical property, the shop characteristic of retained austenite on material has important impact; Appropriate retained austenite can be improved toughness, and anti-contact fatigue and low-temperature flexibility reduce structural stress and quenching distortion; But excessive residual austenite is known from experience reduction hardness, wearing quality; Very high to some sizes, stability requirement especially part, measurer and bearing, the existence of retained austenite can affect precision and life-span;
Therefore, test material residual stress and residual austenite content have very important meaning to guaranteeing iron workpiece quality; But the detection of traditional stress is different with the detection method of residual austenite content, and all exist separately detection difficulty large, sense cycle length and higher shortcoming and the method for testing inconvenience of testing cost.
Summary of the invention
The object of the present invention is to provide a kind of stress of four pin magnetic probes and the sensor that residual austenite content one detects.It detects stress measurement and residual austenite content to be put on a probe instrument, has detection difficulty low, and sense cycle is short, greatly reduces consumables cost, and method of testing is easy, guaranteed the feature of low-cost advantage simultaneously;
The object of the invention is to be achieved through the following technical solutions:
The sensor that a kind of stress of four pin magnetic probes and residual austenite content one detect, it comprises: four magnetic for stress and residual austenite content detection are visited pin, the coiling of two groups of transmission of signals, and with the physa seat at aviation plug junction surface, also has a round tube hole that is used for drawing coiling;
Visit pin uniform array on physa seat for four, wherein two symmetrical spy pin are one group, two other visits pin is another group, same group two visit pin with a copper conductor respectively around the upper identical number of turn, visit pin with regard to corresponding two groups of coilings for four, wherein one group as magnetizing coil, and another group is as magnetic test coil; When magnetizing coil passes into after marking current, can produce alternating magnetization signal magnetic field, visiting pin, be placed on detected material, just can on magnetic test coil, produce corresponding detection signal magnetic field,
Around the spy pin of upper coiling, be grown on physa seat, physa seat further part is with aviation plug junction surface, aviation plug junction surface outside surface is helicitic texture (screw structural), described in that is to say, with the physa seat at aviation plug junction surface, can be screwed on the aviation plug (nut structure) of standard
In physa seat center, design a little round tube hole, be used for drawing coiling, and then both can input magnetization signal, can export again the detection signal of material;
Beneficial effect of the present invention is, the sensor that the stress of described four pin magnetic probes and residual austenite content one detect utilizes the different of stress magnetic anisotropy in ferrimagnet and austenite and martensite magnetic characteristic, realized by the phenetic analysis to detection signal, the stress in ferrimagnet and residual austenite content have been detected; This not only completes the detection set of stress and retained austenite on an instrument, and has reduced the difficulty detecting, and has shortened sense cycle, thereby has extended the actual life of equipment; Due to material is not damaged and reduced consumables cost, cost is lower again.
Accompanying drawing explanation
According to drawings and embodiments the present invention is described in further details below;
Accompanying drawing 1 is two-dimensional side view of the present invention;
Accompanying drawing 3 is that sensor of the present invention is visited foot section schematic diagram;
In figure:
1, the sensor that the stress of four pin magnetic probes and residual austenite content one detect; 2, magnetic is visited pin; 3, coiling; 4, physa seat; 5, aviation plug junction surface; 6, helicitic texture; 7, round tube hole;
Embodiment
Please refer to shown in Fig. 1,2, Fig. 1 is two-dimensional side view of the present invention; Fig. 2 is two-dimentional vertical view of the present invention.The sensor 1 that the stress of described four pin magnetic probes and residual austenite content one detect comprises magnetic spy pin 2, coiling 3, the physa seat 4 with aviation plug junction surface, aviation plug junction surface 5, helicitic texture 6 and round tube hole 7.Wherein coiling 3 is visited on pin 2 for generation of magnetization signal and detection signal around magnetic; Magnetic is visited pin 2 and is grown on physa seat 4, and physa seat 4 further parts are with aviation plug junction surface 5, and aviation plug junction surface 5 outside surfaces are helicitic textures 6, can be screwed on the aviation plug of standard; In physa seat 4 centers, designed a little round tube hole 7, the coiling of coiling 3 can have been drawn, also just magnetization signal can have been imported, and the detection signal of generation is drawn;
Shown in Fig. 3, the sensor 1 that the stress of described four pin magnetic probes and residual austenite content one detect utilizes the different of magnetic characteristic between ferrimagnet stress magnetic anisotropy and retained austenite and martensite, in coiling 3, utilize the marking current passing into produce magnetization signal, magnetic is visited to pin 2 to contact with measured material, material is magnetized, by coiling 3, the retained austenite detection signal in material is conducted out again, by the phenetic analysis to detection signal, realized the harmless of stress in ferrimagnet or austenite content, one detects efficiently,
The sensor that the stress of above-mentioned four pin magnetic probes and residual austenite content detect has been realized stress in ferrimagnet and the one of austenite content detects, measuring accuracy is high, method of testing is easy, flexible, can reach any position of tested ferrimagnet object, and can carry out the nondestructive measurement of material, more can carry out zonation test to material.
Claims (4)
1. the sensor that the stress of four pin magnetic probes and residual austenite content one detect, is characterized in that: comprises,
Four magnetic that detect for stress and residual austenite content one are visited pin, and two groups are used for the coiling of transmission of signal around visiting on pin, and with the physa seat at aviation plug junction surface, and a round tube hole that is used for drawing coiling; Two groups of coilings are respectively magnetizing coil and magnetic test coil, magnetizing coil can provide a magnetization signal magnetic field, magnetic test coil can produce a corresponding detection signal magnetic field, by the data processing of two field signals, can measure ferrimagnet residual stress or residual austenite content.
2. in two groups of coilings according to claim 1, each group all with the identical number of turn on two symmetrical spy pin.
3. the residual austenite content survey sensor of four jiaos of magnetic probes according to claim 1, because the residual austenite content survey sensor of two jiaos of magnetic probes that comprise to invent, so when visiting pin coiling, can select
(1), wherein two symmetrical spy pin are one group, two other is visited pin and is one group and winds the line;
(2), only use four Arbitrary Relatives of visiting in pin to claim two, visit pin for one and be one group and wind the line.
4. magnetic spy pin according to claim 1 can contact with the arbitrary face of measured material when measuring, and measures, and the measured material area of contact is changeable; In the time of large, can adopt multimetering method; In the time of little, can adopt direct measuring method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210381152.1A CN103727974A (en) | 2012-10-10 | 2012-10-10 | Sensor for integral detection of stress and retained austenite content of four-pin magnetic probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210381152.1A CN103727974A (en) | 2012-10-10 | 2012-10-10 | Sensor for integral detection of stress and retained austenite content of four-pin magnetic probe |
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| Publication Number | Publication Date |
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| CN103727974A true CN103727974A (en) | 2014-04-16 |
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| CN201210381152.1A Pending CN103727974A (en) | 2012-10-10 | 2012-10-10 | Sensor for integral detection of stress and retained austenite content of four-pin magnetic probe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109661565A (en) * | 2016-07-25 | 2019-04-19 | 特拉法格股份公司 | For power or the sensing head of torque sensor |
| CN112857468A (en) * | 2021-03-10 | 2021-05-28 | 中国科学院宁波材料技术与工程研究所 | Dual-mode sensor for measuring strain and magnetic field and preparation method thereof |
-
2012
- 2012-10-10 CN CN201210381152.1A patent/CN103727974A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109661565A (en) * | 2016-07-25 | 2019-04-19 | 特拉法格股份公司 | For power or the sensing head of torque sensor |
| CN112857468A (en) * | 2021-03-10 | 2021-05-28 | 中国科学院宁波材料技术与工程研究所 | Dual-mode sensor for measuring strain and magnetic field and preparation method thereof |
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Application publication date: 20140416 |