where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

381 views
Technical Discussions
Maarten Nijsse
Trainee
Smit, Netherlands, Joined Dec 2004, 2

Maarten Nijsse

Trainee
Smit,
Netherlands,
Joined Dec 2004
2
05:41 Dec-02-2004
The correlation of hardness versus distance of slitting-edge with core metal sheets and the deformation of the metal properties.

Recent investigations of magnetic en mechanical properties during mechanical cutting of non-oriented electrical steels have shown deteriorating effects. At the cut edge of the steels (with a thickness of 0.65 mm) a hardening has occurred. This is the result of plastic deformation where mechanical energy, which is used to make the cut, is absorbed by the lattice through a shift of the neighbouring layers and the appearance of micro-structural defects.
According to a NEN-norm the hardness is related to the permeability which says something about the losses due to eddy currents (transformer-core). But at the moment I haven’t been able to find documentation which prove this with non-oriented electrical steels, thickness of 0.65 mm. Furthermore the increase of hardness can cause a problem when the sheets are further processed, here again is the lack of information that supports that. Is there anyone who can help me with any information on the topic described above?



    
 
 Reply 
 
Elmar van den Elzen
Engineering,
Lismar Engineering B.V., Netherlands, Joined Aug 2000, 15

Elmar van den Elzen

Engineering,
Lismar Engineering B.V.,
Netherlands,
Joined Aug 2000
15
09:01 Dec-05-2004
Re: The correlation of hardness versus distance of slitting-edge with core metal sheets and the deformation of the metal properties.
Hello Maarten,

The cutting will cause some deformation in the material and this will affect the mechanical hardness, the electrical conductivity as well as the permeability. This will be true for all ferromagnetic steel types. My guess would be that the deformation and the associated changes of the material properties will be very, very local.

Bye, Elmar van den Elzen

----------- Start Original Message -----------
: Recent investigations of magnetic en mechanical properties during mechanical cutting of non-oriented electrical steels have shown deteriorating effects. At the cut edge of the steels (with a thickness of 0.65 mm) a hardening has occurred. This is the result of plastic deformation where mechanical energy, which is used to make the cut, is absorbed by the lattice through a shift of the neighbouring layers and the appearance of micro-structural defects.
: According to a NEN-norm the hardness is related to the permeability which says something about the losses due to eddy currents (transformer-core). But at the moment I haven’t been able to find documentation which prove this with non-oriented electrical steels, thickness of 0.65 mm. Furthermore the increase of hardness can cause a problem when the sheets are further processed, here again is the lack of information that supports that. Is there anyone who can help me with any information on the topic described above?
------------ End Original Message ------------




    
 
 Reply 
 

Product Spotlight

NDTkit RT

NDTkit RT, TESTIA's Digital Radiography software The NDTkit product line software for X-ray analysi
...
s. NDTkit RT is a software benefiting from the Ultis kernel which is dedicated to radiographic image analysis. It offers a set of tools and filtering processes to assist RT operators in finding relevant flaws.
>

SITEX CPSERIES

Teledyne ICM’s CPSERIES has been designed with a view to revolutionizing the handling and perfor
...
mances of portable X-Ray sets. Despite having managed to halve the weight of similar portable X-Ray generators available on the market (while continuing to provide the same power output), the SITEX CPSERIES generators feature a shutter, a laser pointer, a beryllium window, an aluminum filter and two integrated diaphragms (customized sizes are available upon request). Without compromising the robustness and reliability for which ICM products are renowned, the small size and light weight of the SITEX CPSERIES will radically change the way that you perform your RT inspections. And you will see a positive impact in terms of both quality and return on investment (ROI).
>

PROlineTOP Plug & Play Ultrasonic inspection device

As Plug & Play solution it units all control and operation elements in a small housing and therefo
...
re replaces the typical control cabinet...
>

Combination of Digital Image Correlation and Thermographic Measurements

The combination of measuring results from the digital image correlation (ARAMIS, DIC) and temperat
...
ure measuring data from infrared cameras permits the simultaneous analysis of the thermal and mechanical behavior of test specimens in the materials and components testing field.
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window