20240027402. METHOD FOR DESTRUCTION-FREE DETERMINATION OF THE DEPTH OF HARDENING ON SURFACE-HARDENED COMPONENTS simplified abstract (Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung E.V.)

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METHOD FOR DESTRUCTION-FREE DETERMINATION OF THE DEPTH OF HARDENING ON SURFACE-HARDENED COMPONENTS

Organization Name

Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung E.V.

Inventor(s)

Paul Graja of Dresden (DE)

Norbert Meyendorf of Dresden (DE)

Ralf Schallert of Dresden (DE)

METHOD FOR DESTRUCTION-FREE DETERMINATION OF THE DEPTH OF HARDENING ON SURFACE-HARDENED COMPONENTS - A simplified explanation of the abstract

This abstract first appeared for US patent application 20240027402 titled 'METHOD FOR DESTRUCTION-FREE DETERMINATION OF THE DEPTH OF HARDENING ON SURFACE-HARDENED COMPONENTS

Simplified Explanation

The abstract describes a method for determining the depth of hardening in a component using transverse ultrasonic waves. The method involves coupling a predefined number of pulses of ultrasonic waves into the component's surface. The variance in the amplitude heights of the backscattered or reflected ultrasonic waves between the pulses is detected, and the propagation time of the waves is determined. The difference between the maximum and minimum variances following the in-coupling is calculated and multiplied by a factor between 0 and 1. This product is then summed with the minimum variance. The depth of hardening is determined by considering the product of the propagation time, the cosine of the angle at which the waves are coupled into the surface, and the sound velocity of the waves in the component material.

  • The method involves coupling transverse ultrasonic waves into a component's surface.
  • The variance in the amplitude heights of the backscattered or reflected ultrasonic waves is detected.
  • The propagation time of the ultrasonic waves is determined.
  • The difference between the maximum and minimum variances is calculated and multiplied by a factor between 0 and 1.
  • The product is then summed with the minimum variance.
  • The depth of hardening is determined by considering the product of the propagation time, the cosine of the coupling angle, and the sound velocity of the waves in the component material.

Potential Applications:

  • Non-destructive testing of hardened components in industries such as automotive, aerospace, and manufacturing.
  • Quality control in the production of hardened components.
  • Monitoring the depth of hardening during heat treatment processes.

Problems Solved:

  • Accurately determining the depth of hardening in components.
  • Non-destructively assessing the quality and integrity of hardened components.
  • Providing a reliable and efficient method for depth measurement in hardening processes.

Benefits:

  • Enables precise depth measurement of hardening without damaging the component.
  • Reduces the need for destructive testing methods.
  • Improves quality control and ensures the integrity of hardened components.
  • Increases efficiency and accuracy in heat treatment processes.


Original Abstract Submitted

in the method for determining the depth of hardening d, a predefinable number of at least 5 pulses of transverse ultrasonic waves are coupled into a component at a surface of the component. an individual pulse has at least one oscillation period. between the individual pulses, the variance in the amplitude heights of ultrasonic waves backscattered or reflected back from the component is detected, during which the propagation time tof the ultrasonic waves is determined. the difference between maxima and minima of the determined variances of the ultrasonic waves following the in-coupling is then formed, this value being multiplied by a factor between >0 and 1 and the product being summed with the minimum of the determined variances. the depth of hardening dis determined under consideration of the product from the determined propagation time v, the cosine of the angle �at which the ultrasonic waves are coupled into the component surface, and the sound velocity cof the ultrasonic waves in the component material.

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