What are the detection methods for oil casings?Let's take a brief look:
1. Ultrasonic testing. When ultrasonic waves are scattered in the
tested raw materials, the acoustic properties of the raw materials and
the transformation of the internal structure have a positive impact on
the dissemination of the ultrasonic waves. After the ultrasonic level
and condition are detected, the functional and structural changes of
the raw materials are understood. .
2. Radiation detection. Radiation detection is the use of the
difference in the amount of radiation transmitted through the normal
parts and defects, and the resolution of the blackness on the film is
formed.
3. Permeation detection. Penetration detection is the use of liquid
capillary action, the permeate penetrates the shortcomings of the
surface opening of the solid raw material, and then through the
developer to absorb the permeate permeate to the surface to appear the
defects. Penetration testing is suitable for a variety of metal and
ceramic workpieces, and from the osmotic manipulation to the
shortcomings, the light is relatively short, usually about half an
hour, may be tested surface fatigue, stress corrosion and welding
cracks, may directly measure the size of the crack.
4. Magnetic particle detection. Magnetic particle detection is the use
of magnetic flux leakage to absorb magnetic powder, the formation of
magnetic marks, to provide shortcomings, can detect surface and sub-
surface defects, shortcomings of this nature, simple identification,
paint and plating surface does not affect the detection of vividness.
5. Eddy current detection. Eddy current detection If the eddy current
induced by the ferromagnetic coil in the workpiece is used to analyze
the internal quality of the workpiece, the surface and near surface
defects of various conductive materials can be detected. The control
of common parameters is troublesome, and the detection result is
difficult to explain. Moreover, it is required that the object to be
tested must be a conductive crack, and the length of the defect can be
measured by euphemism.
6. Magnetic flux leakage detection.The magnetic leakage detection of
oil casing is based on the high magnetic permeability of ferromagnetic
raw materials. The permeability of the in-service oil casing is
measured by measuring the permeability change caused by the defects in
the ferromagnetic raw materials.
7. Magnetic impression detection. Magnetic impression detection is the
relationship between the physical nature of the magnetic phenomenon of
metal and the dislocation process. It has many advantages such as high
utilization rate, low cost, no need to polish, and has important and
ordinary use prospects in the industry.
The above is the detection method of the oil casing.
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Informations From: Omnipotent