SU1350483A1 - Method of determining internal stresses in specimens made of ferromagnetic materials - Google Patents
Method of determining internal stresses in specimens made of ferromagnetic materials Download PDFInfo
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- SU1350483A1 SU1350483A1 SU853931335A SU3931335A SU1350483A1 SU 1350483 A1 SU1350483 A1 SU 1350483A1 SU 853931335 A SU853931335 A SU 853931335A SU 3931335 A SU3931335 A SU 3931335A SU 1350483 A1 SU1350483 A1 SU 1350483A1
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- USSR - Soviet Union
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- magnetic susceptibility
- internal stresses
- ferromagnetic materials
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- zero
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
Изобретение относитс к способам неразрушающего контрол объектов из ферромагнитных .материалов и может быть использовано дл определени напр жений в детал х . Целью изобретени вл етс повышение достоверности. В качестве магнитного параметра , завис щего от наличи внутренних напр жений в образце, используют магнитную восприимчивость, которую измер ют в процессе нагрева образца до температуры уменьп ени .магнитной восприи.мчивости до нул , наблюдают наличие или отсутствие максимума магнитной восприимчивости перед ее уменьи)енисм до нул . со О1 о 00 СОThe invention relates to methods for non-destructive testing of objects from ferromagnetic materials and can be used to determine stresses in parts. The aim of the invention is to increase reliability. As a magnetic parameter, depending on the presence of internal stresses in the sample, magnetic susceptibility is used, which is measured during heating of the sample to the temperature of decreasing magnetic susceptibility to zero, the presence or absence of a maximum of magnetic susceptibility is observed to zero. with O1 about 00 WITH
Description
Изобретение относитс к способам кераз- рушающего контрол объектов из ферромагнитных материалов и может быть использовано дл определени напр жений в детал х .The invention relates to methods for ceracological control of objects made of ferromagnetic materials and can be used to determine stresses in parts.
Целью изобретени вл етс повышение достоверности.The aim of the invention is to increase reliability.
Способ осуществл етс следующим образом .The method is carried out as follows.
Исследуемый ферромагнитный образец помещают в печь, расположенную над датчиком прибора, измер ющим магнитную восприимчивость , нагревают образец и в процессе нагрева измер ют магнитную восприимчивость . Нагревание производ т до температуры уменьщени магнитной восприимчивости до нул , т. е. до температуры Кюри. Определ ют характер зависимости магнитной восприимчивости от температуры . Если магнитна восприимчивость в процессе нагрева не измен етс вплоть до температуры Кюри, где магнитна восприимчивость уменьшаетс до нул , то считают, что ферромагнитный образец не имеет внутренних напр жений. В случае, когда за 200-400°С до температуры Кюри начинаетс рост магнитной восприимчивости и не дохоThe ferromagnetic sample under investigation is placed in a furnace located above the sensor of the device that measures the magnetic susceptibility, the sample is heated, and the magnetic susceptibility is measured during the heating process. The heating is carried out to a temperature of decreasing magnetic susceptibility to zero, i.e., to the Curie temperature. The dependence of the magnetic susceptibility on temperature is determined. If the magnetic susceptibility during the heating process does not change up to the Curie temperature, where the magnetic susceptibility decreases to zero, then it is considered that the ferromagnetic sample has no internal stresses. In the case when, for 200-400 ° C, the magnetic susceptibility begins to rise to the Curie temperature and does not reach
д 10-30°С до температуры Кюри, наблюдаетс максимум значений магнитной восприимчивости , считают, что ферромагнитный образец имеет внутренние напр жени . Температура , при которой начинаетс рост магнитной восприимчивости, определ етс составом образца, количеством и величиной внутренних напр жений. Температура максимума магнитной восприимчивости зависит от степени однородности состава образца.d 10-30 ° C to the Curie temperature, a maximum of magnetic susceptibility values is observed, it is considered that the ferromagnetic sample has internal voltages. The temperature at which the growth of magnetic susceptibility begins is determined by the composition of the sample, the number and magnitude of internal stresses. The temperature of the maximum magnetic susceptibility depends on the degree of homogeneity of the sample composition.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU853931335A SU1350483A1 (en) | 1985-07-15 | 1985-07-15 | Method of determining internal stresses in specimens made of ferromagnetic materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU853931335A SU1350483A1 (en) | 1985-07-15 | 1985-07-15 | Method of determining internal stresses in specimens made of ferromagnetic materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1350483A1 true SU1350483A1 (en) | 1987-11-07 |
Family
ID=21189830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU853931335A SU1350483A1 (en) | 1985-07-15 | 1985-07-15 | Method of determining internal stresses in specimens made of ferromagnetic materials |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU1350483A1 (en) |
-
1985
- 1985-07-15 SU SU853931335A patent/SU1350483A1/en active
Non-Patent Citations (1)
| Title |
|---|
| Авторское свидетельство СССР № 892203, кл. G 01 В 7/24, 1978 * |
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