Enhancing Quality Control with DEFECTOMETER M

2 min read
June 5, 2024
Enhancing Quality Control with DEFECTOMETER M

Discover how the DEFECTOMETER M revolutionizes quality control processes with its mobile and user-friendly design.

Maintenance and inspection of hot rolling rolls

Hot-rolled rolls for steel are used continuously for long periods of time at high temperatures and under extremely high pressure. Therefore, heat and abrasion resistance, surface roughness resistance, and crack resistance are required. If the rolls have cracks or defects on the surface, cracks will occur on the rolled material. If further cracks develop from this, the surface will be greatly gouged and the rolling line may be disturbed. To prevent this from happening, the rolls are periodically removed from the line for maintenance. They are being inspected for defects by ultrasonic and eddy current testing, and defects are removed by machining the surface. During the maintenance process, the portable DEFECTOMETER M identifies the location of surface defects, predicts their depth, and confirms that no defects remain after machining.

A rolling mill in operation during the manufacturing process of hot rolled steel.

Material differentiation of various types of rolls

Rolls are used in a variety of industries and are used for different purposes. Rolls can be made of various materials. However, if the external dimensions and shape are the same, it is difficult to visually distinguish between different materials. If rolls made of different materials from the original specifications are installed and used in the line, the quality of the products manufactured from them will be greatly affected. Roll makers therefore use the mobile DEFECTOMETER M to identify the material during the manufacturing process and in storage management.

Quality control in heat treatment process

Metal parts are heat treated to ensure surface hardness depending on the application. It is possible to easily determine hardness without spending time adjusting equipment in advance in the manufacturing process. When parts that have undergone normal heat treatment are used as the standard, an LED indicator will show abnormal parts either above or below that standard.


The portable DEFECTOMETER M comprises a central unit featuring an LED level meter that showcases the signal amplitude alongside a probe. With a straightforward process of positioning the probe on the designated part for inspection, the device swiftly assesses and indicates whether the component meets the required standards, marking it as either 'OK' or 'NOK'.



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