Leeb Hardness Tester
Leeb Hardness Tester
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LEEB HARDNESS TESTER TKM‑359CE

High precision rebound/leeb hardness tester TKM‑359CE intended for quick measuring of metal items in laboratorial, manufacturing, and field conditions.

The leeb hardness tester is intended for non-destructive testing of production quality in metallurgy, mechanical engineering, aircraft, shipbuilding, atomic industry, oil and gas industry.

Leeb hardness tester functions by Leeb method.

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Description

Description

Description of Portable Leeb Hardness Tester

Leeb TKM-359CE Controls Hardness of Following:

  • All basic types of metals and alloys without additional calibrations (structural, tool, corrosion-proof, heat-proof, non-corrosive steels and alloys as well as alloys of nonferrous metals, cast iron, aluminum, bronze, brass);
  •  Items with a surface hardening and high-frequency current hardening;
  •  Items of complicated configuration;
  •  Heavy and big items with a rough surface.

Exploitation Advantages

  • Wide range of controlled metals and alloys.
  •  Low sensitivity to the curvative and roughness of the surface.
  •  Monitoring of hardness change along the surface.
  •  Stable measurements independent from force and time of pressing the probe to the surface.
  •  Possibility of material identification in blank production.
  •  Control of “volumetric” hardness.

Features of Portable Leeb Hardness Tester TKM-359CE:

  •  Impact-, dust- and waterproof housing;
  •  Intuitive graphic interface;
  •  The bright color graphic display allows working at below zero temperature and stays bright at any lighting;
  •  Signalization of exceeding of prescribed readings threshold;
  •  A unique system of statistic data processing and averaging of readings;
  •  Fast adjustment of readings and programming of additional calibrations to basic scales by 2 or fewer standard blocks;
  •  Flexible device memory for the recording of readings and their analysis;
  •  Programming of additional scales calibrations of hardness tester by 2 or less standard test blocks;
  •  Fast programming of additional scales by 2 to 10 standard test blocks.

Leeb Probes characteristics

Photo Probe Type Length, mm Diameter, mm Application
«D» 138 21 Solving the bulk of control problems
«E» 138 21 Probe with indenter made of polycrystalline of boron nitride intended for control
of materials with high hardness
«G» 200 29 Control of items with high structural heterogeneity and roughness Ra from 3.2
Distinctive Attributes

Distinctive Attributes

Requirements to Controlled Item:

  •  Items heavier than 5 kg and thicker than 6 mm need no additional preparation.
  •  Hard items (eg tubes) with awaited hardness from 90 to 250 HB and thicker than 4 mm need no additional preparation.
  •  Other items should be fixed on a support plate by fixing paste.
  •  Roughness of controlled surface providing best measurement accuracy depends on a probe.

Hardness Testers modes

Measurement mode  Readings  Using
By basic scales Basic hardness units (HRC, HB, HV)  Hardness testing of the bulk of products
By additional calibrations to basic scales By HRA, HRB, HSD scales and ultimate tensile strength Hardness testing of high-alloy steels, special cast iron and nonferrous metals
By additional scales  Scales are programmed by the user Special problems solving

The parameters of the statistical processing of measurements

  • Maximum, minimum, mean value, standard deviation from the mean.
  •  The average deviation from the values set by a user, results are more/less the values, the maximum deviation in the large/smaller side of the value.
  •  Number of results outside the upper/lower limit of range (user specified), maximum deviation from the upper/lower border.
  •  Automatic garbage results, incorrect measurement.
  •  Comparison of results of measurements in the series (the comparison charts on the display of the hardness tester).
Technical Parameters

Technical Parameters

Characteristic Values
Accuracy  3%
Calibration error with the first rate test blocks:
Rockwell  1.5 HRC
Brinell 10 HB
Vickers 12 HV
Spot diameter on the item surface for probe positioning From 7 mm
Quantity of possible additional calibrations of scales 5 for every scale
Quantity of additional scales 3
Duration of one measurement 2 seconds
Quantity of measurements for average reading calculation 1-99
Memory capacity, readings 12 400
Maximum quantity of name units of readings generated in memory 100
Quantity of algorithms for known to be false readings during average value calculation 3
PC Connection USB
Power Supply LI-ion accumulator
Dimensions of hardness tester electronic unit 121x69x41 mm
Weight of electronic unit 0.3 kg
Weight of D-probe 0.15 kg
Operating temperature range -15…+50 0C
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