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e-mail: [email protected] – web: www.pamp.comPAMP: PowerPoint Presentation – 03.2009

USE OF ULTRASONIC ANALYSIS FOR THE USE OF ULTRASONIC ANALYSIS FOR THE QUALITY CONTROL OF GOLD STANDARD QUALITY CONTROL OF GOLD STANDARD

LARGE BARSLARGE BARS


M. Genel, D. Manara, B. Badiello, A. Pozzi, A. Tessier M. Genel, D. Manara, B. Badiello, A. Pozzi, A. Tessier -- Laboratory of Assay and Analysis PAMPLaboratory of Assay and Analysis PAMPPresented byPresented by M. GenelM. Genel

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USE OF ULTRASONIC ANALYSIS FOR THE QUALITY CONTROL OF GOLD STANDARD LARGE BARSUSE OF ULTRASONIC ANALYSIS FOR THE QUALITY CONTROL OF GOLD STANDARD LARGE BARS

“What you can see and that can be seen it is only shape “What you can see and that can be seen it is only shape

and colour, what you can ear and that can be heard it is only name and and colour, what you can ear and that can be heard it is only name and

sound. But how can mankind believe that shape and colour, name and sound. But how can mankind believe that shape and colour, name and

“What you can see and that can be seen it is only shape “What you can see and that can be seen it is only shape

and colour, what you can ear and that can be heard it is only name and and colour, what you can ear and that can be heard it is only name and

sound. But how can mankind believe that shape and colour, name and sound. But how can mankind believe that shape and colour, name and

Chuang TzuChuang Tzu ((370 370 -- 318 a C.318 a C.))Chinese philosopherChinese philosopher

Chuang TzuChuang Tzu ((370 370 -- 318 a C.318 a C.))Chinese philosopherChinese philosopher

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sound can be enough to understand the object !…”sound can be enough to understand the object !…”

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sound can be enough to understand the object !…”sound can be enough to understand the object !…”


Introduction - Reference FrameReference Frame

International norm


ASTM E1816-07 Standard practice for Ultrasonic Testing Using Electromagnetic Acoustic Transducer

ASTM E797 Practice for measuring thickness by manual ultrasonic pulse-echo contact method

UNI EN 14127:2004 Non destructive check- Thickness measurement with ultrasonic probe


probe

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Objective and formal quality control system of our productObjective and formal quality control system of our product

USE OF ULTRASONIC ANALYSIS FOR THE QUALITY CONTROL OF GOLD STANDARD LARGE BARSUSE OF ULTRASONIC ANALYSIS FOR THE QUALITY CONTROL OF GOLD STANDARD LARGE BARSIntroduction – RequirementRequirement


Materials and MethodsTheory: Ultrasound

APPLICATIONAPPLICATION


SUBSONIC SUBSONIC RANGERANGE

SUBSONIC SUBSONIC RANGERANGE

AUDIBLE RANGEAUDIBLE RANGEAUDIBLE RANGEAUDIBLE RANGE ULTRASONIC RANGEULTRASONIC RANGEULTRASONIC RANGEULTRASONIC RANGE


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Materials and MethodsTransducers



Krautkramer USM 35XUniversal Ultrasonic Flaw Detector

Sound velocity

Materials and MethodsInstrumentation


Sound velocity1,000 to 15,000 m/s,Display delayFrom -10 to 1,000 mm (340 μs)Probe delay0 to 200 μsAuto calibration2 point calibrationPulse intensity220 pF, 1 nFDamping50 ohms, 500 ohmsPulse repetition frequency4 to 1,000 Hz, variable in 10 stepsFrequency ranges (-3 dB)0.2 to 1 MHz 0.5 to 4 MHz 0 8 8 MH


0.8 to 8 MHz 2 to 20 MHzGain0 to 110 DbFine gain4 dB, continuously variable in 40 stepsRectificationFull-wave, negative and positive half-wave, RF modeRejectLinear, 0 to 80 % screen height Variable in steps of 1 %

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Results – Layering USE OF ULTRASONIC ANALYSIS FOR THE QUALITY CONTROL OF GOLD STANDARD LARGE BARSUSE OF ULTRASONIC ANALYSIS FOR THE QUALITY CONTROL OF GOLD STANDARD LARGE BARS


Results – Gas bubbles USE OF ULTRASONIC ANALYSIS FOR THE QUALITY CONTROL OF GOLD STANDARD LARGE BARSUSE OF ULTRASONIC ANALYSIS FOR THE QUALITY CONTROL OF GOLD STANDARD LARGE BARS

DISSIPATION OF SIGNALDISSIPATION OF SIGNALDISSIPATION OF SIGNALDISSIPATION OF SIGNAL


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Results – Inclusions USE OF ULTRASONIC ANALYSIS FOR THE QUALITY CONTROL OF GOLD STANDARD LARGE BARSUSE OF ULTRASONIC ANALYSIS FOR THE QUALITY CONTROL OF GOLD STANDARD LARGE BARS

REFLECTION OF SIGNALREFLECTION OF SIGNAL


TOOL TOOL DROPPED DROPPED DURING DURING CASTINGCASTING

Results- Counterfeit USE OF ULTRASONIC ANALYSIS FOR THE QUALITY CONTROL OF GOLD STANDARD LARGE BARSUSE OF ULTRASONIC ANALYSIS FOR THE QUALITY CONTROL OF GOLD STANDARD LARGE BARS


Good Standard BarGood Standard Bar “Metal inside Bar”…“Metal inside Bar”… Different Metal BarDifferent Metal Bar

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Remarks

Control asked from marketControl asked from market


Continuous quality improvement (ISO 9001)Continuous quality improvement (ISO 9001)

Not equivalent check but support routine checkNot equivalent check but support routine check

Not definitive check : if bar has not expected ultrasonic profile, but it comply to Not definitive check : if bar has not expected ultrasonic profile, but it comply to routine check, it is remelted or/and it is assigned to other use.routine check, it is remelted or/and it is assigned to other use.


Conclusion

• Rapid method (we check all bars produced)Rapid method (we check all bars produced)


Rapid method (we check all bars produced)Rapid method (we check all bars produced)

•• Non destructive methodNon destructive method

•• Quality check of melting and castingQuality check of melting and casting

•• Market standard controls fittingMarket standard controls fitting


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Thank you for your attention


For any further questions please [email protected]

Bibliography

Industrial Applications of Ultrasound -A Review II. Measurements, Tests, and Process Control Using Low-Intensity Ultrasound-L. C. Lynwnworth - IEEE Transactions on sonics and ultrasonics, VOL. su-22, N. 2, March 1975


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ASTM E1816-07. Standard practice for Ultrasonic Testing Using Electromagnetic Acoustic Transducer

ASTM E797. Practice for measuring thickness by manual ultrasonic pulse-echo contact method


UNI EN 14127:2004. Non destructive check- Thickness measurement with ultrasonic probe

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