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Equotip Live UCI

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The World’s First Wireless Ultrasonic Contact Impedance (UCI) Tester

Equotip Live UCI creates new opportunities for collaboration in
portable ultrasonic hardness testing. The Equotip iOS app allows you to
conduct measurements at a remote location and provide instant access of
your results to your team. There is no longer a need to physically
transport USB sticks or manually send reports by email.

  The UCI method uses the same pyramidshaped diamond as a
conventional Vickers hardness tester. Unlike Vickers testing, no optical
evaluation of the indentation is required, enabling fast and portable
measurements. The UCI method excites a rod into an ultrasonic
oscillation. The test load is applied by a spring and typically ranges
from 1 to 5 kg of force (HV1 – HV5 and HV10). As the diamond is forced
into the material, the frequency of the rod oscillation changes in
response to the contact area between the diamond and the material under
test. The instrument detects the shift in frequency, converts it to a
hardness value which is immediately displayed on the screen. UCI testers
can be used for different applications and typically are used as
portable equivalent to conventional bench top Vickers machines. One of
the main applications is the measurement of hardness in the heat
affected zone (HAZ) of welds in thinner materials. Due to the small
footprint of the Vickers diamond, it is quite effective at measuring up
to the toe of a weld. Other portable testers have a larger footprint and
this limits their ability to measure in this area. It is also an
excellent tool for looking at the hardness of gear teeth due to the
small indentation. Case hardened materials can also be analyzed since
the lighter load does not penetrate into the softer substrate.

 
 
The frequency shift is not only proportional to the indentation
size of a Vickers indenter but is also dependent on the Young’s modulus
of elasticity for the material. Factory calibration is performed on
unalloyed and low alloy steel test blocks for testing materials with a
different Young’s modulus, a special calibration is required. To
calibrate the instrument, specific samples of the material to be
examined are needed. These samples should have hardness values defined
using standard Rockwell, Brinell or Vickers testers. To compensate for
Youngs Modulus differences in the material, the UCI shall be adjusted to
the values measured using the conventional tester. With UCI testers,
the material under test must be fine-grained and homogeneous due to the
small area being examined. The surface condition must also be polished.
Therefore, raw castings and forgings are generally ruled out since the
surface hardness varies from one location to the next – in this case the
rebound method has to be preferred. Large errors in measurement can
also occur if the object is of small size with respect to its weight, as
the object can also vibrate during indentation.

Feature

Native Scale

HV (UCI)

HL

HV (UCI)

µm, µinch

HL

HL

Measuring Range

20 – 2000 HV

150 – 950 HL

20 – 2000 HV

0 – 100 µm; 19 – 70 HRC; 35 – 1‘000 HV

150 – 950 HL

150 – 950 HL

Measuring Accuracy

± 2% (150 – 950 HV)

± 4 HL (0.5% at 800 HL)

± 2% (150 – 950 HV)

± 0.8 µm; ~ ± 1.0 HRC

± 4 HL (0.5% at 800 HL)

± 4 HL (0.5% at 800 HL)

Available Scales

HB, HV, HLD, HRA, HRB, HRC, HR15N, HR15T, MPA

HB, HV, HRB, HRC, HS, MPA

HB, HV, HRA, HRB, HRC, HR15N, HR15T, MPA

HB, HV, HRA, HRB, HRC, R15N, HR15T, HMMRC, MPA

HB, HV, HRA, HRB, HRC, HS, MPA

HB, HV, HRB, HRC, HS, MPA (Equotip Piccolo 2 only)

Available Probes

Universal probe with adjustable test load between HV1 and HV10

Leeb D

UCI (Adjustable HV1 – HV5)

Portable Rockwell Probe 50N (can also be connected directly to PC)

Leeb D / DC / DL / S / E / G / C

Leeb D / DL

Combination With Other Methods

Leeb, Portable Rockwell

Leeb, UCI

Portable Rockwell, UCI

Average Roughness Ra (µm / µinch)

12.5 / 500

2 / 80

12.5 / 500

2 / 80

7 / 275 (Leeb G)

2 / 80

Minimum Mass (kg / lbs)

0.3 / 0.66

0.05 / 0.2

0.3 / 0.66

No requirement

0.02 / 0.045 (Leeb C)

0.05 / 0.2

Minimum Thickness (mm / inch)

5 / 0.2

3 / 0.12

5 / 0.2

10 x indendation depth

1 / 0.04 (Leeb C)

3 / 0.12

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