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20

 

UCI- Ultrasonic Contact Impedance Method 

 

Terminology: 

Definitions: 

UCI Method

:

  

UCI method Ultrasonic Contact Impedance, a hardness testing method developed by 

Dr. Claus Kleesattel in 1961 based on the measurement of the frequency shift of a resonating 
rod caused by the essentially elastic nature of a of the finite area of contact between the 
indenter and the test piece during the penetration. 

 

UCI Hardness Test: a hardness testing practice using a calibrated instrument by pressing 

a resonating rod with a defined indentor, for example, a Vickers Diamond, with a 
fixed force against the surface of the part to be tested. 

 
Calibration: determination of the specific values of the significant operating parameters of 

the UCI instrument by comparison with values indicated by a standardized 

workbench hardness tester or by a set of certified test blocks. 

 

 

Verification according to ASTM A 1038-05 

Check the UCI hardness testing instrument by making at least 5 measurements on a standard reference 

test block of the selected hardness scale. 

The instrument shall be considered verified if each hardness reading falls /- 3% of the actual 

reference test block value. 

 

 

 

 

Summary of Contents for MET-U1A

Page 1: ... Manual 201 933 6300 www phase2plus com Precision Measuring Tools Indexing Fixtures Workholding Fixtures Hardness Testers Ultrasonic Thickness Surface Finish Coating Thickness IP66 Dust Waterproof Protection Non Destructive Hardness Tester ...

Page 2: ...expressed by the following formula HL 1000 x VB VA Where HL is Leeb Hardness VB is the rebound velocity of the impact body VA is the impact velocity of the impact body Ultrasonic Testing UCI Method information UCI method Ultrasonic Contact Impedance a hardness testing method developed by Dr Claus Kleesattel in 1961 based on the measurement of the frequency shift of a resonating rod caused by the e...

Page 3: ...e of checking hardness on a variety of metals with varying mass and thickness Especially suited for checking finished articles with a polished surface since there is no visible imprint left after testing Restrictions include all coarse grain structured metals such as Iron or items that are less than 1mm in thickness Choosing between Dynamic and Ultrasonic Testing The choice between using the dynam...

Page 4: ...ss tests in other scales i e Superficial Rockwell HRN and HRT or any other common hardness scale Conduct hardness test of metals that have significantly different properties from steel iron aluminum and copper alloys etc Setting Test Parameters 1 Scale Selection Press Left or Right Arrow for selections HRC HRB HB HV HLD H1 H2 H3 Ø Yes No 2 Operation Mode Selection Press Left or Right Arrow for sel...

Page 5: ...rity of the battery Be sure to dispose of the battery according to local regulations The battery capacity indicator is shown on the right side of the display Three dark squares inside the battery symbol show the battery condition As the battery discharges the squares disappear one by one from top to bottom Battery charging can be done with the supplied a c adapter or via USB connection to your PC ...

Page 6: ...sducer plug is equipped with a rotating cylindrical lock To connect the transducer make the following steps turn the lock counterclockwise up to the stop Insert the plug of the transducer into the 5 pin female port by pushing slightly turn the lock clockwise slightly until you feel it lock Power Unit On Press Ð button to power on the hardness tester The MET will automatically recognize the type of...

Page 7: ... level TEST Operation Mode Selection Select the required operation mode TEST or CALIBRATE or PROCESS by pushing either Í and Î buttons when you are in the parameter that you need press the Ð button to confirm this procedure The hardness tester is now ready for that operation Operation Canceling To cancel an operation or to return to the previous one press the Ï button Test Mode Test mode and all o...

Page 8: ... Display Archive Mode Archive cell number changing While in the Archive mode Display is shown above you need to push either the Í or Î buttons to change the archive cell number The change of the archive cell number will result in the change of the readings of the measured value 58 1 into the readings of another measured value saved under the relevant archive number 06 07 08 etc The hardness scale ...

Page 9: ...ll automatically start the archive operation for you to save the obtained results If you do not want to save the results and want to continue your measurement push Ð button to switch to measurement and recording operation Deleting Test Results Measurement mode only After you have taken a test you should push the Í button This will delete that test result and the display will then show the previous...

Page 10: ...ss the Î button to change the archive location by increasing numbers Î Once you have selected your archive starting point you need to press the Ð button to bring you to the Measurement mode At this point you may begin taking tests Recording measurements in the archive after choosing starting point recording the measured hardness value 58 1 or mean value into the archive is done by pushing the Î bu...

Page 11: ...blocks with maximum and minimum values in the hardness scale Examples for calibration along the whole C Rockwell scale two reference hardness blocks are required with the values of 25 5 HRC and 65 5 HRC If you do not use the whole range of C Rockwell but only the range of 20 40 HRC perform the calibration on reference hardness blocks with the values of 25 5 HRC and 45 5 HRC Reasons to perform a ca...

Page 12: ...e with each test taken 0 00 the measured value on Rockwell hardness scale HRC no test taken yet Calib No 1 calibration tests performed will increase after each Set Blinking symbol Transducer is ready Battery symbol charge remaining in battery Measurement on reference hardness block 1 step 1 obtaining of mean hardness number Take one reference hardness block Conduct at least FIVE measurements Avera...

Page 13: ... be within acceptable tolerances for the scale If the obtained value exceeds the tolerance of the nominal value then you need to perform CLEAR CALIBRATION function and repeat the CALIBRATION procedure Clear Calibration Operation Hardness tester calibration by users requires highly skilled professional personnel If you failed to introduce the correction to the hardness tester calibration for the se...

Page 14: ...ion by Í or Î button and confirm your selection by the Ð button Mean Value Operation Mean Value operation is used for mean value computation within any interval of the archive cell sample interval Display indication is shown on the figure Hardness scale Mean hardness value on Hrc scale Battery charge symbol Sample interval The meaning of words and symbols on the display HRC Rockwell C hardness sca...

Page 15: ...ls within the sample limits Clear Archive Operation Clear archive operation is designed for deleting ALL stored content in the archive cells In the Processing operation mode select clear archive operation by pushing Í or Î button Push Ð yes button The words Please wait clear archive will appear and in two seconds the archive will be deleted The First Measurement U1 ultrasonic hardness transducer B...

Page 16: ...position The first measurement has been completed and the hardness tester is ready for the next measurement Experimental Measurement It is advisable to consider the first measurement as experimental measurement In order to acquire some experience of how to use the transducer it is recommended to conduct a number of experimental measurements Acquiring some experience working with the transducer To ...

Page 17: ...re Use the supplied Leeb test block to check your hardness tester prior to your own testing applications Loading the impact device Press down the loading tube to lock the impact body Placement Place the support ring Round part on the bottom of device on the surface to be measured The distance between two test points should not be less than 0 1 in 3mm ...

Page 18: ...the purpose of acquiring some experience of using the transducer you may use Clear Archive function to delete the results of the experimental measurements Acquiring some experience of working with the transducer To acquire some experience of working with the transducer it is recommended to use reference hardness blocks Measure the hardness of a reference hardness block not less than 10 20 measurem...

Page 19: ...mpact body after it has performed 1000 2000 tests using the following procedure Screw off the support ring and take out the impact body Clean the tube by winding the brush counter clockwise into the tube until it reaches the bottom and then pull it out Repeat this procedure 5 6 times Replace the impact body and support ring Release the impact spring after each test Never apply lubrication of any k...

Page 20: ...ssing a resonating rod with a defined indentor for example a Vickers Diamond with a fixed force against the surface of the part to be tested Calibration determination of the specific values of the significant operating parameters of the UCI instrument by comparison with values indicated by a standardized workbench hardness tester or by a set of certified test blocks Verification according to ASTM ...

Page 21: ...en carbide is propelled against the sample surface by a spring force and then rebounds back At a distance of 1mm from the sample surface the impact and rebound velocity of the impact body are measured by the following method A permanent magnet embedded in the impact body when passing through the coil in its coil holder induces in the coil an electric voltage proportional to the velocities of the m...

Page 22: ... its structure Increase the number of measurements to obtain average Tested area has not been prepared properly Smooth out surface finish The diamond pyramid or carbide ball are dirty Clean using rubbing alcohol The diamond pyramid tip or hardmetal ball are damaged Contact the service center D1 Dynamic Transducer The impact device is not making proper contact or alignment with the surface The hard...

Page 23: ... 0 0 0 0 0 90 0 5 0 0 0 0 0 0 0 0 Hardness Diameters of Convex Cylindrical Surfaces Reading 1 4 in 3 8 in 1 2 in 5 8 in 3 4 in 7 8 in 1 in 6 4 mm 10mm 13mm 16 mm 19 mm 22 mm 25 mm 0 12 5 8 5 6 5 5 5 4 5 3 5 3 0 10 12 0 8 0 6 0 5 0 4 0 3 5 3 0 20 11 0 7 5 5 5 4 5 4 0 3 5 3 0 30 10 0 6 5 5 0 4 5 3 5 3 0 2 5 40 9 0 6 0 4 5 4 0 3 0 2 5 2 5 50 8 0 5 5 4 0 3 5 3 0 2 5 2 0 60 7 0 5 0 3 5 3 0 2 5 2 0 2 0 ...

Page 24: ... 65 8 51 4 471 495 443 229 46 73 6 60 83 5 64 8 50 3 458 480 432 221 45 73 1 59 2 83 0 64 0 49 0 446 466 421 215 44 72 5 58 5 82 5 63 1 47 8 434 452 409 208 43 72 0 57 7 82 0 62 2 46 7 423 438 400 201 42 71 5 56 9 81 5 61 3 45 5 412 426 390 195 41 70 9 56 2 80 9 60 4 44 3 402 414 381 188 40 70 4 55 4 80 4 59 5 43 1 392 402 371 182 39 69 9 54 6 79 9 58 6 41 9 382 391 362 177 38 69 4 53 8 79 4 57 7 ...

Page 25: ...76 162 81 140 83 51 1 87 6 71 8 55 8 159 173 159 80 137 82 50 6 87 3 71 1 54 8 156 170 156 76 135 81 50 86 9 70 4 53 8 153 167 153 73 133 80 49 5 86 6 69 7 52 8 150 164 150 72 130 79 48 9 86 3 69 1 51 8 147 161 147 70 128 78 48 4 86 0 68 4 50 8 144 158 144 69 126 77 47 9 85 6 67 7 49 8 141 155 141 68 124 76 47 3 85 3 67 1 48 8 139 152 139 67 122 75 46 8 86 0 66 4 47 8 137 150 137 66 120 74 46 3 84...

Page 26: ...inted from the Annual Book of ASTM Standards copyright American Society for Testing and Materials 100 Barr Harbor Drive West Conshohocken PA 19428 2959 _____________________________________________________________________________________________________ ASTM Hardness Minimum Thickness Requirements Minimum allowable thickness for a corresponding hardness in the respective scales Minimum Minimum Roc...

Page 27: ...to the usage and methodology of the UCI transducer and related components a Power unit on by pressing the Ð button This will bring you to the archive screen b Press the Ð button again and that will put you in the measurement screen c Place the UCI transducer on the top of one of the supplied test blocks Hold the footing at the bottom of the transducer firmly flat against the block This must be hel...

Page 28: ...ct Beijing 100192 China Tel 86 10 82752121 Fax 86 10 82750352 General E mail info phase2china com cn MEXICO Phase II de Mexico Calle A No 4 Promer Piso Col San Marcos Azcapotzalco C P 02020 Mexico Tel 011 525 5538 39771 Fax same General E mail phase2mexico hotmail com VENEZUELA Phase II Herramientas Universales EDCM CA Av Francisco Lazo Marti CC Plaza Santa Monica PB Local Santa Monica Caracas 104...

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