[MW:9621] Re: Cr. % Variation after Heat Treatment.

Dear Harish,
Could u please give me some litratute how PMI machine work (How
electrons transmitted to material and detect elements)?

Regards
Israr Ahmed
09930308261

On Jan 31, 11:56 am, Harish Kannepalli <harishkannepa...@gmail.com>
wrote:
> Dear Israr,
>                PMI  is technique for fast identification of materials. When
> it is used for accurate measurements of chemical composition, problems
> arise. If you observe the standard deviation beside the reading, you may
> understand the reason for this variation. In XRF, the reading is given by
> the electron signal generated by the incident X-rays, so during X-ray
> irradiation the number of electrons removed may vary for each reading taken;
> the detector noise may also affect the reading. As a precaution, please use
> the PMI at max. temp of 40°C beyond which detector has more noise signal.
>
> 2011/1/31 israr ahmed <ahmedisrar...@gmail.com>
>
>
>
>
>
> > Dear All,
>
> > I had Witnessed a PMI test on Material 34CrNiMo6 The Cr. % obtain 1.3 to
> > 1.4, After Machining the Rod and Heat treatment and temparing the same
> > material is tested fore PMI and found Cr.0.98 to 1.2 Percent.The Cr. %
> > become less by 0.1 to 0.2 %. Can any body tell what may be the reason.
>
> > Regards
> > Israr Ahmed Noor Mohammed
> > +919930308261
>
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> --
> regards,
> Harish.- Hide quoted text -
>
> - Show quoted text -

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